Merge pull request #66 from jkriege2/add_qt6_compatibility

Add qt6 compatibility

.github/workflows/codeql-analysis.yml

@@ -51,7 +51,11 @@ jobs:
         # queries: ./path/to/local/query, your-org/your-repo/queries@main
 
     - name: Install dependencies
-      run: sudo apt -y install build-essential cmake mesa-common-dev libglu1-mesa-dev libfontconfig1 qt5-qmake qtbase5-dev-tools qt5-default libqt5opengl5-dev qtdeclarative5-dev libqt5svg5-dev libqt5x11extras5-dev
+      run: |
+          sudo apt-get update
+          sudo apt-get update --fix-missing
+          sudo apt-get install -f
+          sudo apt -y install build-essential cmake mesa-common-dev libglu1-mesa-dev libfontconfig1 qt5-qmake qtbase5-dev-tools qt5-default libqt5opengl5-dev qtdeclarative5-dev libqt5svg5-dev libqt5x11extras5-dev
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
@@ -60,7 +64,7 @@ jobs:
           mkdir build
           cd build
           cmake --version
-          cmake -G "Unix Makefiles" "-DCMAKE_BUILD_TYPE=Release" ..
+          cmake -G "Unix Makefiles" "-DCMAKE_BUILD_TYPE=Release" "-DJKQtPlotter_BUILD_EXAMPLES:BOOL=OFF" ..
           cmake --build . --config "Release"
           cd ..
 

README.md

@@ -8,6 +8,8 @@ This software is licensed under the term of the [GNU Lesser General Public Licen
 
 ![Language](https://img.shields.io/github/languages/top/jkriege2/JKQtPlotter)
 [![Qt5](https://img.shields.io/badge/Qt-5-brightgreen)](https://doc.qt.io/qt-5/)
+[![Qt6](https://img.shields.io/badge/Qt-6-brightgreen)](https://doc.qt.io/qt-6/)
+
 [![Documentation](https://img.shields.io/badge/documentation-online-blue)](http://jkriege2.github.io/JKQtPlotter/index.html)
 
 [![Build status](https://ci.appveyor.com/api/projects/status/vq2o9pfi97isxm2a?svg=true)](https://ci.appveyor.com/project/jkriege2/jkqtplotter)
@@ -29,7 +31,7 @@ This software is licensed under the term of the [GNU Lesser General Public Licen
 ## Main Features
 - 2D Plotter widget class (JKQTPlotter)
   - high-quality plotting
-  - no other dependencies than Qt >= 5.0
+  - no other dependencies than Qt >= 5.0 ([CImg](https://cimg.eu/) and [OpenCV](https://opencv.org/) are optional dependencies)
   - highly customizable axes/grids (linear/log, date/time, custom ticks ...)
   - integrated LaTeX parser (pure C++, no dependencies) to render mathematical equations in axis labels, ticks, ...
   - extensive user-interactions pre-programmed (several zooming modes, selecting regions, custom context menus, switch graph visibility, ...)

appveyor.yml

@@ -37,6 +37,12 @@ environment:
       CMAKE_GENERATOR: "Visual Studio 16 2019"
       CMAKE_BUILDFLAGS: /verbosity:minimal /maxcpucount
       
+    - QTABI: msvc2019_64
+      COMPILER: MSVC
+      QTVER: 6.3.0
+      CMAKE_GENERATOR: "Visual Studio 16 2019"
+      CMAKE_BUILDFLAGS: /verbosity:minimal /maxcpucount
+      
 #    - QTABI: mingw81_64
 #      COMPILER: MinGW
 #      MINGWDIR: C:\Qt\Tools\mingw810_64
@@ -48,6 +54,11 @@ environment:
       QTVER: 5.15
       CMAKE_GENERATOR: "Unix Makefiles"
 
+    - QTABI: gcc_64
+      COMPILER: GCC
+      QTVER: 6.2
+      CMAKE_GENERATOR: "Unix Makefiles"
+      
 image:
   # AppVeyor builds are ordered by the image list:
   - Visual Studio 2019

cmake/jkqtplotter_common_compilersettings.cmake

@@ -1,8 +1,5 @@
 cmake_minimum_required(VERSION 3.1)
 
-# configure compiler
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED on)
 
 if(NOT APPLE)
     set(CMAKE_INSTALL_RPATH $ORIGIN)

cmake/jkqtplotter_common_qtsettings.cmake

@@ -6,3 +6,15 @@ set(CMAKE_AUTOUIC ON)
 
 find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
 find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
+if(${QT_VERSION_MAJOR} VERSION_GREATER_EQUAL "6")
+    find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS OpenGLWidgets)
+endif()
+
+# configure compiler
+if(${QT_VERSION_MAJOR} VERSION_LESS "6" )
+    set(CMAKE_CXX_STANDARD 11)
+    set(CMAKE_CXX_STANDARD_REQUIRED on)
+else()
+    set(CMAKE_CXX_STANDARD 17)
+    set(CMAKE_CXX_STANDARD_REQUIRED on)
+endif()

cmake/jkqtplotter_deployqt.cmake

@@ -3,13 +3,15 @@ function(jkqtplotter_deployqt TARGET_NAME)
     if (WIN32)
         get_target_property(_qmake_executable Qt${QT_VERSION_MAJOR}::qmake IMPORTED_LOCATION)
         get_filename_component(_qt_bin_dir "${_qmake_executable}" DIRECTORY)
-        find_program(WINDEPLOYQT_EXECUTABLE windeployqt HINTS "${_qt_bin_dir}")
+        find_program(WINDEPLOYQT_ENV_SETUP qtenv2.bat HINTS "${_qt_bin_dir}")
-
-        set(WINDEPLOYQTOPTION "--release")
         if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-            set(WINDEPLOYQTOPTION "--debug")
+          find_program(WINDEPLOYQT_EXECUTABLE NAMES windeployqt.debug.bat HINTS "${_qt_bin_dir}")
+        else()
+          find_program(WINDEPLOYQT_EXECUTABLE NAMES windeployqt HINTS "${_qt_bin_dir}")
         endif()        
 
+
+
         # install system runtime lib
         include( InstallRequiredSystemLibraries )
         if( CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS )
@@ -18,13 +20,7 @@ function(jkqtplotter_deployqt TARGET_NAME)
 
         get_filename_component(CMAKE_CXX_COMPILER_BINPATH ${CMAKE_CXX_COMPILER} DIRECTORY )
         add_custom_command(TARGET ${TARGET_NAME} POST_BUILD
-            COMMAND "${CMAKE_COMMAND}" -E
+            COMMAND "${WINDEPLOYQT_ENV_SETUP}" && "${WINDEPLOYQT_EXECUTABLE}" \"$<TARGET_FILE:${TARGET_NAME}>\"
-                env PATH="${CMAKE_CXX_COMPILER_BINPATH}\;${_qt_bin_dir}" "${WINDEPLOYQT_EXECUTABLE}"
-                    --compiler-runtime
-                       -xml
-                       -printsupport
-                    ${WINDEPLOYQTOPTION}
-                    \"$<TARGET_FILE:${TARGET_NAME}>\"
             COMMENT "Running windeployqt ... "
         )
     endif(WIN32)

doc/Doxyfile

@@ -44,7 +44,7 @@ PROJECT_NUMBER         =
 # for a project that appears at the top of each page and should give viewer a
 # quick idea about the purpose of the project. Keep the description short.
 
-PROJECT_BRIEF          = "an extensive Qt5 Plotter framework (including a feature-richt plotter widget, a speed-optimized, but limited variant and a LaTeX equation renderer!), written fully in C/C++ and without external dependencies"
+PROJECT_BRIEF          = "an extensive Qt5+Qt6 Plotter framework (including a feature-richt plotter widget, a speed-optimized, but limited variant and a LaTeX equation renderer!), written fully in C/C++ and without external dependencies"
 
 # With the PROJECT_LOGO tag one can specify a logo or an icon that is included
 # in the documentation. The maximum height of the logo should not exceed 55

doc/dox/buildinstructions.dox

@@ -89,6 +89,8 @@ Here is the \c CMakeLists.txt from that directory:
 
 	# Configure project for usage of Qt5
 	find_package(Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGl REQUIRED)
+	# Configure project for usage of Qt6
+	#find_package(Qt6 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGl OpenGLWidgets REQUIRED)
 
 	# include JKQTPlotter
 	find_package(JKQTCommonLib REQUIRED)

doc/dox/mainpage.dox

@@ -2,7 +2,7 @@
 
 \mainpage JKQTPlotter - A Qt Plotting Library
 
-- This is an extensive library of function/data plotter classes for Qt (>= 5.0, tested with Qt up to 5.12).
+- This is an extensive library of function/data plotter classes for Qt5 (tested with Qt up to 5.15) and  Qt6 (tested with Qt up to 6.3).
 - This software is licensed under the term of the GNU Lesser General Public License 2.1 
 (LGPL 2.1) or above. See \ref licensesec for details.
 - <a href="http://jkriege2.github.io/JKQtPlotter/index.html">Online-Documentation (http://jkriege2.github.io/JKQtPlotter/index.html)</a>
@@ -14,7 +14,7 @@
 \section jkqtp_main_features Main Features
 - <b>Extensive Scientific 2D Plotting framework (JKQTPlotter / JKQTBasePlotter)</b>
   - high-quality plotting
-  - no other dependencies than Qt >= 5.0
+  - no other required dependencies than Qt5 or Qt6
   - highly customizable axes/grids (linear/log, date/time, custom ticks ...)
   - integrated LaTeX parser/renderer JKQTMathText for axis labels, ticks, notes ...
   - \ref JKQTPLOTTER_USERINTERACTION "extensive user-interactions pre-programmed (several zooming modes, selecting regions, custom context menus, switch graph visibility, ...)"

doc/dox/whatsnew.dox

@@ -41,6 +41,7 @@ Changes, compared to  \ref page_whatsnew_V2019_11 "v2019.11" include:
   <li>improved/breaking change: made more functions and function parameters const</li>
   <li>improved/breaking change: image plots now manage CONST-data, not plain pointer arrays... This is OK, since the raw data is never owned nor modified by the plot, only referenced!.</li>
   <li>bugfixed/improved: aspect ratio handling in JKQTPlotter.</li>
+  <li>new: Compatibility with Qt 5.15 and Qt6</li>
   <li>new: added geometric plot objects JKQTPGeoArrow to draw arrows (aka lines with added line-end decorators, also extended JKQTPGeoLine, JKQTPGeoInfiniteLine, JKQTPGeoPolyLines to draw line-end decorator (aka arrows)</li>
   <li>new: all geometric objects can either be drawn as graphic element (i.e. lines are straight line, even on non-linear axes), or as mathematical curve (i.e. on non-linear axes, lines become the appropriate curve representing the linear function, connecting the given start/end-points). The only exceptions are ellipses (and the derived arcs,pies,chords), which are always drawn as mathematical curves</li>
   <li>new: a new graph class JKQTPXYFunctionLineGraph draws parametric 2D curves ( \f$ [x,y] = f(t) \f$ ), see \ref JKQTPlotterEvalCurves for an example</li>

examples/advplotstyling/advplotstyling.cpp

@@ -14,7 +14,8 @@
 int main(int argc, char* argv[])
 {
 
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/barchart/barchart.cpp

@@ -103,7 +103,8 @@ void doExample()
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/boxplot/boxplot.cpp

@@ -12,7 +12,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/cmake_link_example/CMakeLists.txt

@@ -1,5 +1,5 @@
 # set minimum required CMake-Version
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.20)
 
 # set Project name
 set(EXAMPLE_NAME simpletest)
@@ -12,7 +12,7 @@ set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_CXX_STANDARD 11)
 #set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 
-# Configure project for usage of Qt5
+# Configure project for usage of Qt5/Qt6
 find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGl REQUIRED)
 find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
 

examples/cmake_link_example/README.md

@@ -5,7 +5,7 @@ This project (see [`cmake_link_example`](https://github.com/jkriege2/JKQtPlotter
 This example uses very simple code, which simply displays a plotter and shows some data. The important part of this example is the ´CMakeLists.txt`-file:
 ```
 	# set minimum required CMake-Version
-	cmake_minimum_required(VERSION 3.10)
+	cmake_minimum_required(VERSION 3.20)
 
 	# set Project name
 	set(EXAMPLE_NAME simpletest)
@@ -15,11 +15,13 @@ This example uses very simple code, which simply displays a plotter and shows so
 	# some basic configurations
 	set(CMAKE_AUTOMOC ON)
 	set(CMAKE_INCLUDE_CURRENT_DIR ON)
-	set(CMAKE_CXX_STANDARD 11)
+	set(CMAKE_CXX_STANDARD 11)    # for Qt5
+	#set(CMAKE_CXX_STANDARD 17)   # for QT6
 	#set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 
-	# Configure project for usage of Qt5
+  # Configure project for usage of Qt5/Qt6
-	find_package(Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGl REQUIRED)
+  find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGl REQUIRED)
+  find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
 
 	# include JKQTPlotter
 	find_package(JKQTCommonLib REQUIRED)

examples/contourplot/contourplot.cpp

@@ -20,7 +20,7 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0)
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/datastore/datastore.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/datastore_groupedstat/datastore_groupedstat.cpp

@@ -19,7 +19,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/datastore_iterators/datastore_iterators.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/datastore_regression/datastore_regression.cpp

@@ -19,7 +19,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/datastore_statistics/datastore_statistics.cpp

@@ -19,7 +19,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/datastore_statistics_2d/datastore_statistics_2d.cpp

@@ -19,7 +19,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/dateaxes/dateaxes.cpp

@@ -169,7 +169,8 @@ void drawWithTimeAxis(JKQTPlotter& plot) {
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/distributionplot/test_distributionplot.cpp

@@ -18,7 +18,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/errorbarstyles/errorbarstyles.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/evalcurve/evalcurve.cpp

@@ -14,7 +14,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/filledgraphs/filledgraphs.cpp

@@ -11,7 +11,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/functionplot/functionplot.cpp

@@ -135,7 +135,8 @@ void drawExample(QApplication& app, const QString& name) {
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/geo_arrows/geo_arrows.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/geo_simple/geo_simple.cpp

@@ -85,7 +85,8 @@ void drawEllExample(JKQTPlotter* plot, double x0, double y0, double wid, double
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/geometric/geometric.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/imageplot/imageplot.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/imageplot_modifier/imageplot_modifier.cpp

@@ -12,7 +12,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/imageplot_nodatastore/imageplot_nodatastore.cpp

@@ -12,7 +12,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/imageplot_userpal/imageplot_userpal.cpp

@@ -18,7 +18,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/impulsesplot/impulsesplot.cpp

@@ -14,7 +14,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/jkqtmathtext_simpletest/jkqtmathtext_simpletest.cpp

@@ -12,7 +12,7 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/jkqtmathtext_test/jkqtmathtext_test.cpp

@@ -4,7 +4,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/jkqtmathtext_test/testform.cpp

@@ -400,7 +400,9 @@ void TestForm::updateMath()
 
     painter.begin(&pix);
     if (ui->chkAntiAlias->isChecked()) painter.setRenderHint(QPainter::Antialiasing);
+#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
     if (ui->chkAntiAliasHQ->isChecked()) painter.setRenderHint(QPainter::HighQualityAntialiasing);
+#endif
     if (ui->chkAntiAliasText->isChecked()) painter.setRenderHint(QPainter::TextAntialiasing);
     if (ui->chkSmoothTransform->isChecked()) painter.setRenderHint(QPainter::QPainter::SmoothPixmapTransform);
     ht.start();

examples/jkqtplot_test/jkqtplot_test.cpp

@@ -6,7 +6,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/logaxes/logaxes.cpp

@@ -15,7 +15,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/mandelbrot/mandelbrot.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/multiplot/test_multiplot.cpp

@@ -16,7 +16,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/parametriccurve/parametriccurve.cpp

@@ -12,7 +12,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/paramscatterplot/paramscatterplot.cpp

@@ -12,7 +12,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/paramscatterplot_image/paramscatterplot_image.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/parsedfunctionplot/parsedfunctionplot.cpp

@@ -18,7 +18,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/rgbimageplot/rgbimageplot.cpp

@@ -14,7 +14,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/rgbimageplot_qt/rgbimageplot_qt.cpp

@@ -15,7 +15,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/simpletest/simpletest.cpp

@@ -12,13 +12,15 @@
 int main(int argc, char* argv[])
 {
 
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif
 
 
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/speed/speed.cpp

@@ -8,7 +8,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/stackedbars/stackedbars.cpp

@@ -103,7 +103,8 @@ void addGraph(JKQTPlotter& plot, bool swapXY) {
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/stepplots/stepplots.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/styledboxplot/test_styledboxplot.cpp

@@ -12,7 +12,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/styling/test_styling_main.cpp

@@ -6,7 +6,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/symbols_and_errors/symbols_and_errors.cpp

@@ -14,7 +14,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/symbols_and_styles/symbols_and_styles.cpp

@@ -13,7 +13,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/ui/ui.cpp

@@ -5,7 +5,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/user_interaction/test_user_interaction_main.cpp

@@ -5,7 +5,8 @@
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

examples/violinplot/violinplot.cpp

@@ -164,7 +164,8 @@ JKQTPlotter* showPlot() {
 int main(int argc, char* argv[])
 {
         
-#if QT_VERSION >= 0x050600
+#if QT_VERSION >= QT_VERSION_CHECK(5,6,0) &&  QT_VERSION < QT_VERSION_CHECK(6,0,0)
+
     QApplication::setAttribute(Qt::AA_EnableHighDpiScaling); // DPI support
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
 #endif

lib/CMakeLists.txt

@@ -10,7 +10,10 @@ message( STATUS "Version:           ${PROJECT_VERSION}")
 if (CMAKE_BUILD_TYPE)
     message( STATUS "Build type:        ${CMAKE_BUILD_TYPE}")
 endif(CMAKE_BUILD_TYPE)
-message( STATUS "Using compiler:    ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}" )
+message( STATUS "Using CMake:       ${CMAKE_VERSION}")
+message( STATUS "        Generator: ${CMAKE_GENERATOR}")
+message( STATUS "Using compiler:    ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}, platform: ${CMAKE_CXX_PLATFORM_ID}" )
+message( STATUS "C++ Standard:      C++${CMAKE_CXX_STANDARD}, required: ${CMAKE_CXX_STANDARD_REQUIRED}" )
 message( STATUS "Architecture:      ${CMAKE_CXX_LIBRARY_ARCHITECTURE} / ${CMAKE_LIBRARY_ARCHITECTURE}" )
 message( STATUS "System Name:       ${CMAKE_SYSTEM_NAME}" )
 message( STATUS "Processor Name:    ${CMAKE_SYSTEM_PROCESSOR}" )

lib/jkqtcommon/CMakeLists.txt

@@ -100,9 +100,15 @@ if(JKQtPlotter_BUILD_SHARED_LIBS)
     target_link_libraries(${libsh_name} PUBLIC Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Gui Qt${QT_VERSION_MAJOR}::Xml Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::PrintSupport)
     target_compile_definitions(${libsh_name} PUBLIC JKQTCOMMON_LIB_IN_DLL)
     target_compile_definitions(${libsh_name} PRIVATE JKQTCOMMON_LIB_EXPORT_LIBRARY)
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 11)
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
         target_compile_features(${libsh_name} PUBLIC cxx_std_11)
+    else()
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${libsh_name} PUBLIC cxx_std_17)
+    endif()
     if(MINGW)
       # COMPILER-SETTINGS FOR MINGW
       target_compile_options(${libsh_name} PUBLIC -fexceptions)
@@ -125,9 +131,15 @@ if(JKQtPlotter_BUILD_STATIC_LIBS)
     add_library(${lib_name} STATIC ${SOURCES} ${HEADERS})
     set_property(TARGET ${lib_name} PROPERTY VERSION "${PROJECT_VERSION}")
     set_property(TARGET ${lib_name} PROPERTY OUTPUT_NAME  "${lib_name_decorated}")
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
         set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 11)
         set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
         target_compile_features(${lib_name} PUBLIC cxx_std_11)
+    else()
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${lib_name} PUBLIC cxx_std_17)
+    endif()
     if(MINGW)
       # COMPILER-SETTINGS FOR MINGW
       target_compile_options(${lib_name} PUBLIC -fexceptions)

lib/jkqtcommon/LibTarget.cmake.in

@@ -7,8 +7,7 @@
 
 
 # package requires Qt 5/6
-find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
+find_package(Qt@QT_VERSION_MAJOR@ COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
-find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
 
 # include auto-generated targets.cmake file
 include("${CMAKE_CURRENT_LIST_DIR}/@JKQTP_CURRENT_TARGET_FILENAME@")

lib/jkqtcommon/jkqtpbasicimagetools.cpp

@@ -25,6 +25,12 @@
 #ifdef QT_XML_LIB
 #  include <QtXml/QtXml>
 #endif
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+#include<QRegularExpression>
+#include<QRegularExpressionMatch>
+#else
+#include<QRegExp>
+#endif
 
 const int JKQTPImageTools::PALETTE_ICON_WIDTH = 64;
 const int JKQTPImageTools::PALETTE_IMAGEICON_HEIGHT = 64;
@@ -2609,7 +2615,7 @@ JKQTPImageTools::LUTType JKQTPBuildColorPaletteLUTLinInterpolate(const QMap<doub
 {
     QList<QPair<double, QRgb> > itemsi;
     for (auto it=items.begin(); it!=items.end(); ++it) {
-        itemsi.append(qMakePair<double, QRgb>(it.key(), it.value()));
+        itemsi.append(QPair<double, QRgb>(it.key(), it.value()));
     }
     return JKQTPBuildColorPaletteLUTLinInterpolateSorted(itemsi, lut_size);
 }
@@ -2618,7 +2624,7 @@ JKQTPImageTools::LUTType JKQTPBuildColorPaletteLUT(const QMap<double, QRgb> &ite
 {
     QList<QPair<double, QRgb> > itemsi;
     for (auto it=items.begin(); it!=items.end(); ++it) {
-        itemsi.append(qMakePair<double, QRgb>(it.key(), it.value()));
+        itemsi.append(QPair<double, QRgb>(it.key(), it.value()));
     }
     return JKQTPBuildColorPaletteLUTSorted(itemsi, lut_size);
 }
@@ -2820,26 +2826,48 @@ QVector<int> JKQTPImageTools::registerPalettesFromFile(const QString &filename,
             bool has4=false;
             bool rgb255=false;
             QList<QPair<double, QRgb> > pal;
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+            QRegularExpression rx3("\\s*([0-9eE.+-]+)\\s*([,\\t ])\\s*([0-9eE.+-]+)\\s*\\2\\s*([0-9eE.+-]+)\\s*", QRegularExpression::CaseInsensitiveOption|QRegularExpression::InvertedGreedinessOption);
+            QRegularExpression rx4("\\s*([0-9eE.+-]+)\\s*([,\\t ])\\s*([0-9eE.+-]+)\\s*\\2\\s*([0-9eE.+-]+)\\s*\\2\\s*([0-9eE.+-]+)\\s*", QRegularExpression::CaseInsensitiveOption|QRegularExpression::InvertedGreedinessOption);
+#else
             QRegExp rx3("\\s*([0-9eE.+-]+)\\s*([,\\t ])\\s*([0-9eE.+-]+)\\s*\\2\\s*([0-9eE.+-]+)\\s*", Qt::CaseInsensitive);
             rx3.setMinimal(false);
             QRegExp rx4("\\s*([0-9eE.+-]+)\\s*([,\\t ])\\s*([0-9eE.+-]+)\\s*\\2\\s*([0-9eE.+-]+)\\s*\\2\\s*([0-9eE.+-]+)\\s*", Qt::CaseInsensitive);
             rx4.setMinimal(false);
+#endif
+
             // determine format
             for (int i=slt.size()-1; i>=0; i--) {
                 slt[i]=slt[i].trimmed();
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+                const auto m4=rx4.match(slt[i]);
+                const auto m3=rx3.match(slt[i]);
+                if (m4.hasMatch()) {
+                    const double r=JKQTPImagePlot_QStringToDouble(m4.captured(3));
+                    const double g=JKQTPImagePlot_QStringToDouble(m4.captured(4));
+                    const double b=JKQTPImagePlot_QStringToDouble(m4.captured(5));
+#else
                 if (rx4.indexIn(slt[i])>=0) {
+                    const double r=JKQTPImagePlot_QStringToDouble(rx4.cap(3));
+                    const double g=JKQTPImagePlot_QStringToDouble(rx4.cap(4));
+                    const double b=JKQTPImagePlot_QStringToDouble(rx4.cap(5));
+#endif
                     has4=true;
-                    double r=JKQTPImagePlot_QStringToDouble(rx4.cap(3));
-                    double g=JKQTPImagePlot_QStringToDouble(rx4.cap(4));
-                    double b=JKQTPImagePlot_QStringToDouble(rx4.cap(5));
                     if (r>1.0 || g>1.0 || b>1.0) {
                         rgb255=true;
                     }
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+                } else if (m3.hasMatch()) {
+                    const double r=JKQTPImagePlot_QStringToDouble(m3.captured(1));
+                    const double g=JKQTPImagePlot_QStringToDouble(m3.captured(3));
+                    const double b=JKQTPImagePlot_QStringToDouble(m3.captured(4));
+#else
                 } else if (rx3.indexIn(slt[i])>=0) {
-                    has4=false;
                     double r=JKQTPImagePlot_QStringToDouble(rx3.cap(1));
                     double g=JKQTPImagePlot_QStringToDouble(rx3.cap(3));
                     double b=JKQTPImagePlot_QStringToDouble(rx3.cap(4));
+#endif
+                    has4=false;
                     if (r>1.0 || g>1.0 || b>1.0) {
                         rgb255=true;
                     }
@@ -2852,6 +2880,20 @@ QVector<int> JKQTPImageTools::registerPalettesFromFile(const QString &filename,
             for (int i=0; i<slt.size(); i++) {
                 double x=0;
                 double r=0, g=0, b=0;
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+                const auto m4=rx4.match(slt[i]);
+                const auto m3=rx3.match(slt[i]);
+                if (has4 && m4.hasMatch()) {
+                    x=JKQTPImagePlot_QStringToDouble(m4.captured(1));
+                    r=JKQTPImagePlot_QStringToDouble(m4.captured(3));
+                    g=JKQTPImagePlot_QStringToDouble(m4.captured(4));
+                    b=JKQTPImagePlot_QStringToDouble(m4.captured(5));
+                } else if (!has4 && m3.hasMatch()) {
+                    x=i;
+                    r=JKQTPImagePlot_QStringToDouble(m3.captured(1));
+                    g=JKQTPImagePlot_QStringToDouble(m3.captured(3));
+                    b=JKQTPImagePlot_QStringToDouble(m3.captured(4));
+#else
                 if (has4 && rx4.indexIn(slt[i])>=0) {
                     x=JKQTPImagePlot_QStringToDouble(rx4.cap(1));
                     r=JKQTPImagePlot_QStringToDouble(rx4.cap(3));
@@ -2863,15 +2905,16 @@ QVector<int> JKQTPImageTools::registerPalettesFromFile(const QString &filename,
                     g=JKQTPImagePlot_QStringToDouble(rx3.cap(3));
                     b=JKQTPImagePlot_QStringToDouble(rx3.cap(4));
                     //qDebug()<<r<<g<<b;
+#endif
                 } else {
                     ok=false;
                     break;
                 }
                 if (ok) {
                     if (!rgb255) {
-                        pal<<qMakePair(x, qRgb(qBound(0,static_cast<int>(round(255*r)), 255), qBound(0,static_cast<int>(round(255*g)), 255), qBound(0,static_cast<int>(round(255*b)), 255)));
+                        pal<<QPair<double,QRgb>(x, qRgb(qBound(0,static_cast<int>(round(255*r)), 255), qBound(0,static_cast<int>(round(255*g)), 255), qBound(0,static_cast<int>(round(255*b)), 255)));
                     } else {
-                        pal<<qMakePair(x, qRgb(qBound(0,static_cast<int>(round(r)), 255), qBound(0,static_cast<int>(round(g)), 255), qBound(0,static_cast<int>(round(b)), 255)));
+                        pal<<QPair<double,QRgb>(x, qRgb(qBound(0,static_cast<int>(round(r)), 255), qBound(0,static_cast<int>(round(g)), 255), qBound(0,static_cast<int>(round(b)), 255)));
                     }
                 }
             }

lib/jkqtcommon/jkqtpstringtools.cpp

@@ -45,7 +45,12 @@ Copyright (c) 2008-2020 Jan W. Krieger (<jan@jkrieger.de>)
 #include <ctype.h>
 #include <sstream>
 #include <locale>
-
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+#include<QRegularExpression>
+#include<QRegularExpressionMatch>
+#else
+#include<QRegExp>
+#endif
 
 std::string jkqtp_tolower(const std::string& s){
   std::string d;
@@ -527,6 +532,24 @@ QString jkqtp_QColor2String(QColor color, bool useSpecialTransparencySyntax) {
 
 QColor jkqtp_String2QColor(const QString &color)
 {
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+    QRegularExpression rxP("(.+)\\s*,\\s*(\\d+\\.?\\d+)\\%");
+    QRegularExpression rxNP("(.+)\\s*,\\s*([\\d]+)");
+    const auto mP=rxP.match(color);
+    if (mP.hasMatch()) {
+        QColor col(mP.captured(1));
+        double a=QLocale::c().toDouble(mP.captured(2));
+        col.setAlphaF(a/100.0);
+        return col;
+    }
+    const auto mNP=rxNP.match(color);
+    if (mNP.hasMatch()) {
+        QColor col(mNP.captured(1));
+        double a=QLocale::c().toInt(mNP.captured(2));
+        col.setAlphaF(a/255.0);
+        return col;
+    }
+#else
     QRegExp rxP("(.+)\\s*,\\s*(\\d+\\.?\\d+)\\%");
     QRegExp rxNP("(.+)\\s*,\\s*([\\d]+)");
     if (rxP.exactMatch(color)) {
@@ -541,6 +564,7 @@ QColor jkqtp_String2QColor(const QString &color)
         col.setAlphaF(a/255.0);
         return col;
     }
+#endif
     return QColor(color);
 }
 

lib/jkqtcommon/jkqttools.cpp

@@ -23,9 +23,17 @@
 
 #include <QList>
 #include <QApplication>
-#include <QDesktopWidget>
 #include <QLocale>
 #include <QtCore>
+#if (QT_VERSION>QT_VERSION_CHECK(5, 3, 0))
+#  include <QScreen>
+#  include <QGuiApplication>
+#else
+#  include <QDesktopWidget>
+#endif
+#if QT_VERSION>=QT_VERSION_CHECK(6,0,0)
+#  include <QByteArrayView>
+#endif
 
 void jksaveWidgetGeometry(QSettings& settings, QWidget* widget, const QString& prefix) {
     settings.setValue(prefix+"pos", widget->pos());
@@ -34,11 +42,15 @@ void jksaveWidgetGeometry(QSettings& settings, QWidget* widget, const QString& p
 
 void jkloadWidgetGeometry(QSettings& settings, QWidget* widget, QPoint defaultPosition, QSize defaultSize, const QString& prefix) {
     QPoint pos = settings.value(prefix+"pos", defaultPosition).toPoint();
-    QSize size = settings.value(prefix+"size", defaultSize).toSize();
+    const QSize size = settings.value(prefix+"size", defaultSize).toSize();
-
+#if (QT_VERSION>=QT_VERSION_CHECK(5, 3, 0))
-    widget->resize(size.boundedTo(QApplication::desktop()->screenGeometry(widget).size()));
+    const auto widgeo = widget->screen()->geometry();
-    if (pos.x()<0 || pos.x()>QApplication::desktop()->screenGeometry(widget).width()) pos.setX(0);
+#else
-    if (pos.y()<0 || pos.y()>QApplication::desktop()->screenGeometry(widget).height()) pos.setY(0);
+    const auto widgeo = QApplication::desktop()->screenGeometry(widget);
+#endif
+    widget->resize(size.boundedTo(widgeo.size()));
+    if (pos.x()<0 || pos.x()>widgeo.width()) pos.setX(0);
+    if (pos.y()<0 || pos.y()>widgeo.height()) pos.setY(0);
     widget->move(pos);
 }
 
@@ -78,7 +90,23 @@ QString jkVariantListToString(const QList<QVariant>& data, const QString& separa
     for (int i=0; i<data.size(); i++) {
         if (i>0) r=r+separator;
         QVariant v=data[i];
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+        if (v.typeId()==QMetaType::Bool) r=r+loc.toString(v.toBool());
+        else if (v.typeId()==QMetaType::Char) r=r+loc.toString(v.toInt());
+        else if (v.typeId()==QMetaType::QDate) r=r+loc.toString(v.toDate());
+        else if (v.typeId()==QMetaType::QDateTime) r=r+loc.toString(v.toDateTime());
+        else if (v.typeId()==QMetaType::Double) r=r+loc.toString(v.toDouble());
+        else if (v.typeId()==QMetaType::Int) r=r+loc.toString(v.toInt());
+        else if (v.typeId()==QMetaType::LongLong) r=r+loc.toString(v.toLongLong());
+        else if (v.typeId()==QMetaType::QString) r=r+QString("\"%1\"").arg(v.toString().replace("\"", "_").replace("\t", " ").replace("\r", "").replace("\n", " ").replace(",", " ").replace(";", " "));
+        else if (v.typeId()==QMetaType::QTime) r=r+loc.toString(v.toTime());
+        else if (v.typeId()==QMetaType::UInt) r=r+loc.toString(v.toUInt());
+        else if (v.typeId()==QMetaType::ULongLong) r=r+loc.toString(v.toULongLong());
+        else r=r+v.toString();
+
+#else
         switch (v.type()) {
+
             case QVariant::Bool: r=r+loc.toString(v.toBool()); break;
             case QVariant::Char: r=r+loc.toString(v.toInt()); break;
             case QVariant::Date: r=r+loc.toString(v.toDate()); break;
@@ -93,6 +121,7 @@ QString jkVariantListToString(const QList<QVariant>& data, const QString& separa
             //case : r=r+loc.toString(v.); break;
             default: r=r+v.toString(); break;
         }
+#endif
     }
     return r;
 }
@@ -101,7 +130,11 @@ JKQTCOMMON_LIB_EXPORT QString jkqtp_filenameize(const QString& data) {
     QString r;
     QString data1=data.simplified();
     for (int i=0; i<data1.size(); i++) {
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+        const auto c=data1[i];
+#else
         QCharRef c=data1[i];
+#endif
         if (c.isLetterOrNumber() || (c=='-') || (c=='_') || (c=='.')) {
             r+=c;
         } else {
@@ -167,7 +200,11 @@ QString jkqtp_MouseButton2String(Qt::MouseButton button, bool useNONE)
     }
     if (button==Qt::LeftButton) return "LEFT";
     if (button==Qt::RightButton) return "RIGHT";
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+    if (button==Qt::MiddleButton) return "MIDDLE";
+#else
     if (button==Qt::MidButton) return "MIDDLE";
+#endif
     if (button==Qt::BackButton) return "BACK";
     if (button==Qt::ForwardButton) return "FORWARD";
     if (button==Qt::TaskButton) return "TASK";
@@ -200,7 +237,11 @@ Qt::MouseButton jkqtp_String2MouseButton(const QString &button)
     auto but=button.toUpper().trimmed();
     if (but=="LEFT") return Qt::LeftButton;
     if (but=="RIGHT") return Qt::RightButton;
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+    if (but=="MIDDLE") return Qt::MiddleButton;
+#else
     if (but=="MIDDLE") return Qt::MidButton;
+#endif
     if (but=="BACK") return Qt::BackButton;
     if (but=="FORWARD") return Qt::ForwardButton;
     if (but=="TASK") return Qt::TaskButton;
@@ -227,3 +268,12 @@ Qt::MouseButton jkqtp_String2MouseButton(const QString &button)
     if (but=="EXTRA24") return Qt::ExtraButton24;
     return Qt::NoButton;
 }
+
+quint16 jkqtp_checksum(const void *data, size_t len)
+{
+#if QT_VERSION>=QT_VERSION_CHECK(6,0,0)
+    return qChecksum(QByteArrayView(static_cast<const uint8_t*>(data), len));
+#else
+    return qChecksum(static_cast<const char*>(data), len);
+#endif
+}

lib/jkqtcommon/jkqttools.h

@@ -134,6 +134,12 @@ JKQTCOMMON_LIB_EXPORT QString jkqtp_MouseButton2String(Qt::MouseButton button, b
  *  \see jkqtp_MouseButton2String()
  */
 JKQTCOMMON_LIB_EXPORT Qt::MouseButton jkqtp_String2MouseButton(const QString &button);
+/** \brief convert a <a href="http://doc.qt.io/qt-5/qstring.html">QString</a> (created by jkqtp_MouseButton2String() ) to <a href="http://doc.qt.io/qt-5/qt.html#MouseButton-enum">Qt::MouseButton</a>
+ *  \ingroup tools
+ *
+ *  \see jkqtp_MouseButton2String()
+ */
+JKQTCOMMON_LIB_EXPORT quint16 jkqtp_checksum(const void* data, size_t len);
 
 
 #endif // JKQTTOOLS_H

lib/jkqtfastplotter/CMakeLists.txt

@@ -21,7 +21,7 @@ set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 
 # Set up source files
 set(SOURCES
-  jkqtfastplotter.cpp
+  ${CMAKE_CURRENT_LIST_DIR}/jkqtfastplotter.cpp
 )
 
 set(HEADERS
@@ -40,10 +40,17 @@ if(JKQtPlotter_BUILD_SHARED_LIBS)
     set_property(TARGET ${libsh_name} PROPERTY VERSION "${PROJECT_VERSION}")
     set_property(TARGET ${libsh_name} PROPERTY OUTPUT_NAME  "${libsh_name_decorated}")
     target_link_libraries(${libsh_name} PUBLIC Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Gui Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::PrintSupport Qt${QT_VERSION_MAJOR}::OpenGL JKQTCommonSharedLib)
-    target_compile_definitions(${libsh_name} PUBLIC JKQTFASTPLOTTER_LIB_IN_DLL)
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 11)
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
         target_compile_features(${libsh_name} PUBLIC cxx_std_11)
+    else()
+        target_link_libraries(${libsh_name} PUBLIC Qt${QT_VERSION_MAJOR}::OpenGLWidgets)
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${libsh_name} PUBLIC cxx_std_17)
+    endif()
+    target_compile_definitions(${libsh_name} PUBLIC JKQTFASTPLOTTER_LIB_IN_DLL)
     if(MINGW)
       # COMPILER-SETTINGS FOR MINGW
       target_compile_options(${libsh_name} PUBLIC -fexceptions)
@@ -67,8 +74,6 @@ if(JKQtPlotter_BUILD_STATIC_LIBS)
     add_library(${lib_name} STATIC ${SOURCES} ${RESOURCES} ${HEADERS})
     set_property(TARGET ${lib_name} PROPERTY VERSION "${PROJECT_VERSION}")
     set_property(TARGET ${lib_name} PROPERTY OUTPUT_NAME  "${lib_name_decorated}")
-    set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 11)
-    set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
     if(MINGW)
       # COMPILER-SETTINGS FOR MINGW
       target_compile_options(${lib_name} PUBLIC -fexceptions)
@@ -77,8 +82,17 @@ if(JKQtPlotter_BUILD_STATIC_LIBS)
       target_compile_options(${lib_name} PUBLIC /EHsc)
       target_compile_definitions(${lib_name} PUBLIC NOMINMAX)
     endif()
-    target_compile_features(${lib_name} PUBLIC cxx_std_11)
     target_link_libraries(${lib_name} PUBLIC Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Gui Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::PrintSupport Qt${QT_VERSION_MAJOR}::OpenGL JKQTCommonLib)
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 11)
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${lib_name} PUBLIC cxx_std_11)
+    else()
+        target_link_libraries(${lib_name} PUBLIC Qt${QT_VERSION_MAJOR}::OpenGLWidgets)
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${lib_name} PUBLIC cxx_std_17)
+    endif()
     target_include_directories(${lib_name} PUBLIC
         $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/../>
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>  

lib/jkqtfastplotter/LibTarget.cmake.in

@@ -7,8 +7,10 @@
 
 
 # package requires Qt 5/6
-find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
+find_package(Qt@QT_VERSION_MAJOR@ COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
-find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
+if(${QT_VERSION_MAJOR} VERSION_GREATER_EQUAL "6")
+    find_package(Qt@QT_VERSION_MAJOR@ REQUIRED COMPONENTS OpenGLWidgets)
+endif()
 find_package(JKQTCommon@JKQTP_CURRENT_TARGET_SHAREDPART@Lib REQUIRED PATHS ${CMAKE_CURRENT_LIST_DIR} ${CMAKE_MODULE_PATH})
 
 # include auto-generated targets.cmake file

lib/jkqtfastplotter/jkqtfastplotter.cpp

@@ -69,7 +69,11 @@ void JKQTFPPlot::paint(QPainter& painter) {
 }
 
 JKQTFastPlotter::JKQTFastPlotter(QWidget *parent) :
-    QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel | QGL::Rgba), parent)//, mutexRepaint(QMutex::Recursive), mutexRepaintData(QMutex::Recursive), mutexRepaintSystem(QMutex::Recursive)
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+    JKQTFASTPLOTTER_BASE(parent)
+#else
+    JKQTFASTPLOTTER_BASE(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel | QGL::Rgba), parent)//, mutexRepaint(QMutex::Recursive), mutexRepaintData(QMutex::Recursive), mutexRepaintSystem(QMutex::Recursive)
+#endif
 {
     mouseDragStart=QPoint(0,0);
     mouseDragEnd=QPoint(0,0);
@@ -263,7 +267,7 @@ void JKQTFastPlotter::mouseReleaseEvent(QMouseEvent *event)
 }
 
 void JKQTFastPlotter::resizeEvent(QResizeEvent *event) {
-     QGLWidget::resizeEvent(event);
+     JKQTFASTPLOTTER_BASE::resizeEvent(event);
      if (width() > image.width() || height() > image.height()) {
          QImage newImage(QSize(width(), height()), QImage::Format_ARGB32);
          image=newImage;
@@ -350,7 +354,7 @@ void JKQTFastPlotter::plotSystem(QPainter& painter) {
             systemPath.moveTo(x2p(x), internalPlotBorderTop+plotHeight+tickLength);
             systemPath.lineTo(x2p(x), internalPlotBorderTop+plotHeight-tickLength);
             QString text=QLocale::system().toString(x);
-            painter.drawText(QPointF(x2p(x)-fmTicks.width(text)/2.0, internalPlotBorderTop+plotHeight+fmTicks.ascent()+fmTicks.width("x")/2.0+tickLength), text);
+            painter.drawText(QPointF(x2p(x)-fmTicks.boundingRect(text).width()/2.0, internalPlotBorderTop+plotHeight+fmTicks.ascent()+fmTicks.boundingRect("x").width()/2.0+tickLength), text);
         }
         if (xAxisLog) {
             x=x*10.0;
@@ -368,7 +372,7 @@ void JKQTFastPlotter::plotSystem(QPainter& painter) {
             systemPath.moveTo(x2p(x), internalPlotBorderTop+plotHeight+tickLength);
             systemPath.lineTo(x2p(x), internalPlotBorderTop+plotHeight-tickLength);
             QString text=QLocale::system().toString(x);
-            painter.drawText(QPointF(x2p(x)-fmTicks.width(text)/2.0, internalPlotBorderTop+plotHeight+fmTicks.ascent()+fmTicks.width("x")/2.0+tickLength), text);
+            painter.drawText(QPointF(x2p(x)-fmTicks.boundingRect(text).width()/2.0, internalPlotBorderTop+plotHeight+fmTicks.ascent()+fmTicks.boundingRect("x").width()/2.0+tickLength), text);
         }
         if (xAxisLog) {
             x=x/10.0;
@@ -387,7 +391,7 @@ void JKQTFastPlotter::plotSystem(QPainter& painter) {
             systemPath.moveTo(internalPlotBorderLeft-tickLength, y2p(y));
             systemPath.lineTo(internalPlotBorderLeft+tickLength, y2p(y));
             QString text=QLocale::system().toString(y);
-            painter.drawText(QPointF(internalPlotBorderLeft-fmTicks.width("x")/2.0-fmTicks.width(text)-tickLength, y2p(y)+fmTicks.ascent()/2.0), text);
+            painter.drawText(QPointF(internalPlotBorderLeft-fmTicks.boundingRect("x").width()/2.0-fmTicks.boundingRect(text).width()-tickLength, y2p(y)+fmTicks.ascent()/2.0), text);
         }
         if (yAxisLog) {
             y=y*10.0;
@@ -405,7 +409,7 @@ void JKQTFastPlotter::plotSystem(QPainter& painter) {
             systemPath.moveTo(internalPlotBorderLeft-tickLength, y2p(y));
             systemPath.lineTo(internalPlotBorderLeft+tickLength, y2p(y));
             QString text=QLocale::system().toString(y);
-            painter.drawText(QPointF(internalPlotBorderLeft-fmTicks.width("x")/2.0-fmTicks.width(text)-tickLength, y2p(y)+fmTicks.ascent()/2.0), text);
+            painter.drawText(QPointF(internalPlotBorderLeft-fmTicks.boundingRect("x").width()/2.0-fmTicks.boundingRect(text).width()-tickLength, y2p(y)+fmTicks.ascent()/2.0), text);
         }
         if (yAxisLog) {
             y=y/10.0;
@@ -453,11 +457,11 @@ void JKQTFastPlotter::plotSystem(QPainter& painter) {
     if (xAxisLabelVisible) {
         painter.setPen(pSystem);
         painter.setFont(fLabels);
-        painter.drawText(QPointF(internalPlotBorderLeft+plotWidth-fmLabels.width(xAxisLabel), internalPlotBorderTop+plotHeight+fmTicks.height()+fmTicks.width("x")/2.0+fmLabels.ascent()+tickLength), xAxisLabel);
+        painter.drawText(QPointF(internalPlotBorderLeft+plotWidth-fmLabels.boundingRect(xAxisLabel).width(), internalPlotBorderTop+plotHeight+fmTicks.height()+fmTicks.boundingRect("x").width()/2.0+fmLabels.ascent()+tickLength), xAxisLabel);
     }
     if (yAxisLabelVisible) {
         painter.save(); auto __finalpaintinner=JKQTPFinally([&painter]() {painter.restore();});
-        painter.translate(fmLabels.ascent(), internalPlotBorderTop+fmLabels.width(yAxisLabel));
+        painter.translate(fmLabels.ascent(), internalPlotBorderTop+fmLabels.boundingRect(yAxisLabel).width());
         painter.rotate(-90);
         painter.drawText(QPointF(0, 0), yAxisLabel);
 

lib/jkqtfastplotter/jkqtfastplotter.h

@@ -34,7 +34,13 @@
 #include <cmath>
 #include <iostream>
 #include <QMutex>
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+#include <QtOpenGLWidgets/QOpenGLWidget>
+#define JKQTFASTPLOTTER_BASE QOpenGLWidget
+#else
 #include <QGLWidget>
+#define JKQTFASTPLOTTER_BASE QGLWidget
+#endif
 #include "jkqtcommon/jkqtpmathtools.h"
 #ifdef DEBUG_TIMING
 #  include "jkqtcommon/jkqtphighrestimer.h"
@@ -83,7 +89,13 @@ class JKQTFPPlot;
     .
 
 */
-class JKQTFASTPLOTTER_LIB_EXPORT JKQTFastPlotter : public QGLWidget {
+class JKQTFASTPLOTTER_LIB_EXPORT JKQTFastPlotter :
+        #if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+        public QOpenGLWidget
+        #else
+        public QGLWidget
+        #endif
+{
         Q_OBJECT
     public:
 

lib/jkqtmathtext/CMakeLists.txt

@@ -47,9 +47,15 @@ if(JKQtPlotter_BUILD_SHARED_LIBS)
     target_link_libraries(${libsh_name} PUBLIC Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Gui Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::PrintSupport JKQTCommonSharedLib)
     target_compile_definitions(${libsh_name} PUBLIC JKQTMATHTEXT_LIB_IN_DLL)
     target_compile_definitions(${libsh_name} PRIVATE JKQTMATHTEXT_LIB_EXPORT_LIBRARY)
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 11)
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
         target_compile_features(${libsh_name} PUBLIC cxx_std_11)
+    else()
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${libsh_name} PUBLIC cxx_std_17)
+    endif()
     if(MINGW)
       # COMPILER-SETTINGS FOR MINGW
       target_compile_options(${libsh_name} PUBLIC -fexceptions)
@@ -75,9 +81,15 @@ if(JKQtPlotter_BUILD_STATIC_LIBS)
     add_library(${lib_name} STATIC ${SOURCES} ${RESOURCES} ${HEADERS})
     set_property(TARGET ${lib_name} PROPERTY VERSION "${PROJECT_VERSION}")
     set_property(TARGET ${lib_name} PROPERTY OUTPUT_NAME  "${lib_name_decorated}")
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
         set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 11)
         set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
         target_compile_features(${lib_name} PUBLIC cxx_std_11)
+    else()
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${lib_name} PUBLIC cxx_std_17)
+    endif()
     if(MINGW)
       # COMPILER-SETTINGS FOR MINGW
       target_compile_options(${lib_name} PUBLIC -fexceptions)

lib/jkqtmathtext/LibTarget.cmake.in

@@ -7,8 +7,7 @@
 
 
 # package requires Qt 5/6
-find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
+find_package(Qt@QT_VERSION_MAJOR@ COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
-find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
 
 find_package(JKQTCommon@JKQTP_CURRENT_TARGET_SHAREDPART@Lib REQUIRED PATHS ${CMAKE_CURRENT_LIST_DIR} ${CMAKE_MODULE_PATH})
 

lib/jkqtmathtext/jkqtmathtext.cpp

@@ -30,6 +30,7 @@
 #include <QApplication>
 #include <QPainterPath>
 
+
 const double JKQTMathText::ABS_MIN_LINEWIDTH=0.02;
 
 QPainterPath makeHBracePath(double x, double ybrace, double width, double bw, double cubicshrink=0.5, double cubiccontrolfac=0.3) {
@@ -277,14 +278,14 @@ void JKQTMathText::MTtextNode::getSizeInternal(QPainter& painter, JKQTMathText::
     QRectF tbr=parent->getTightBoundingRect(f, txt, painter.device()); //fm.tightBoundingRect(txt);
     if (txt=="|") {
         br=fm.boundingRect("X");
-        tbr=QRectF(0,0,fm.width("X"), fm.ascent());//fm.boundingRect("X");
+        tbr=QRectF(0,0,fm.boundingRect("X").width(), fm.ascent());//fm.boundingRect("X");
         br.setWidth(0.7*br.width());
     }
     width=br.width();//width(text);
 
     if (txt.size()>0) {
         if (txt[0].isSpace() /*&& br.width()<=0*/) width=width+fm.boundingRect("I").width();
-        if (txt.size()>1 && txt[txt.size()-1].isSpace() /*&& (fm.boundingRect("a ").width()==fm.boundingRect("a").width())*/) width=width+fm.width("I");
+        if (txt.size()>1 && txt[txt.size()-1].isSpace() /*&& (fm.boundingRect("a ").width()==fm.boundingRect("a").width())*/) width=width+fm.boundingRect("I").width();
     }
 
     //qDebug()<<"text: "<<text<<"   "<<tbr.height()<<tbr.top()<<tbr.bottom();
@@ -340,7 +341,7 @@ double JKQTMathText::MTtextNode::draw(QPainter& painter, double x, double y, JKQ
     QFontMetricsF fm(f, painter.device());
     /*if (txt.size()>1 && txt[txt.size()-1].isSpace()) {
         QFontMetricsF fm(f, painter.device());
-        //if ((fm.width("a ")==fm.width("a"))) dx=fm.boundingRect("I").width();
+        //if ((fm.QFMF_WIDTH("a ")==fm.QFMF_WIDTH("a"))) dx=fm.boundingRect("I").QFMF_WIDTH();
     }*/
 
     if (!hasDigits || !f.italic()) {
@@ -367,7 +368,7 @@ double JKQTMathText::MTtextNode::draw(QPainter& painter, double x, double y, JKQ
                     painter.setFont(ff);
                     painter.drawText(QPointF(xx, y), QString(txt[i]));
                 }
-                xx=xx+fmff.width(txt[i]);
+                xx=xx+fmff.boundingRect(txt[i]).width();
             } else {
                 if (currentEv.font==MTEblackboard && parent->blackboardSimulated) {
                     QPainterPath path;
@@ -377,7 +378,7 @@ double JKQTMathText::MTtextNode::draw(QPainter& painter, double x, double y, JKQ
                     painter.setFont(f);
                     painter.drawText(QPointF(xx, y), QString(txt[i]));
                 }
-                xx=xx+fm.width(txt[i]);
+                xx=xx+fm.boundingRect(txt[i]).width();
             }
             i++;
         }
@@ -465,7 +466,7 @@ void JKQTMathText::MTinstruction1Node::getSizeInternal(QPainter& painter, JKQTMa
     child->getSize(painter, ev, width, baselineHeight, overallHeight, strikeoutPos);
     if (name=="colorbox" || name=="fbox" || name=="boxed") {
         QFontMetricsF fm(ev.getFont(parent));
-        double xw=fm.width("x");
+        double xw=fm.boundingRect("x").width();
         width+=xw;
         overallHeight+=xw;
         baselineHeight+=xw/2.0;
@@ -488,7 +489,7 @@ double JKQTMathText::MTinstruction1Node::draw(QPainter& painter, double x, doubl
         child->getSize(painter, currentEv, width, baselineHeight, overallHeight, strikeoutPos);
         QPen p=painter.pen();
         QFontMetricsF fm(currentEv.getFont(parent));
-        double xw=fm.width("x");
+        double xw=fm.boundingRect("x").width();
         p.setColor(fcol);
         painter.setPen(p);
         painter.drawRect(QRectF(x,y-baselineHeight-xw/2,width+xw,overallHeight+xw));
@@ -2860,11 +2861,11 @@ void JKQTMathText::MTsymbolNode::getSizeInternal(QPainter& painter, JKQTMathText
     if (currentEv.insideMath) width=qMax(parent->getTightBoundingRect(f, symb, painter.device()).width(),parent->getTightBoundingRect(f, "i", painter.device()).width());//fm.width(symbol);
     else width=fm.boundingRect(symb).width();//fm.width(symbol);
 
-    width=qMax(fm.width("j"), width);
+    width=qMax(fm.boundingRect("j").width(), width);
     if (symb.isEmpty()) {
-        width=fm.width("a");
+        width=fm.boundingRect("a").width();
-        if (symbolName=="|") width=fm.width("1")*0.8;
+        if (symbolName=="|") width=fm.boundingRect("1").width()*0.8;
-        else if (symbolName=="infty") width=fm.width("M");
+        else if (symbolName=="infty") width=fm.boundingRect("M").width();
         else if (symbolName=="quad" || symbolName=="qquad") width=parent->getTightBoundingRect(f, "M", painter.device()).width();
         else if (symbolName==" " || symbolName=="space") width=parent->getTightBoundingRect(f, "x", painter.device()).width();
         else if (symbolName==";") width=parent->getTightBoundingRect(f, "x", painter.device()).width()*0.75;
@@ -2933,7 +2934,7 @@ double JKQTMathText::MTsymbolNode::draw(QPainter& painter, double x, double y, J
     p.setWidthF(fm.lineWidth());
     p.setStyle(Qt::SolidLine);
     painter.setPen(p);
-    double xwi=fm.width("x");
+    double xwi=fm.boundingRect("x").width();
     if (!props.symbol.isEmpty()) {
         // if the symbol has been recognized in the constructor: draw the symbol
         painter.drawText(QPointF(x+shift, y+props.yfactor*overallHeight), props.symbol);
@@ -2949,7 +2950,7 @@ double JKQTMathText::MTsymbolNode::draw(QPainter& painter, double x, double y, J
         f1.setItalic(false);
         painter.setFont(f1);
         painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
-        painter.translate(x+shift+fm1.width("8")/3.0, y-fm1.xHeight());
+        painter.translate(x+shift+fm1.boundingRect("8").width()/3.0, y-fm1.xHeight());
         painter.rotate(90);
         painter.drawText(QPointF(0,0), "8");
 
@@ -2961,7 +2962,7 @@ double JKQTMathText::MTsymbolNode::draw(QPainter& painter, double x, double y, J
         painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
         painter.translate(x+shift, y);
         painter.drawText(QPointF(0,0), "|");
-        painter.translate(fm1.width("8")/3.0, 0);
+        painter.translate(fm1.boundingRect("8").width()/3.0, 0);
         painter.drawText(QPointF(0,0), "|");
 
 
@@ -4876,7 +4877,9 @@ void JKQTMathTextLabel::internalPaint()
             //qDebug()<<"internalPaint(): "<<p.begin(&buffer);
             p.begin(&buffer);
             p.setRenderHint(QPainter::Antialiasing);
+#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
             p.setRenderHint(QPainter::HighQualityAntialiasing);
+#endif
             p.setRenderHint(QPainter::TextAntialiasing);
             size=m_mathText->getSize(p);
             p.end();
@@ -4889,7 +4892,9 @@ void JKQTMathTextLabel::internalPaint()
             //qDebug()<<"internalPaint(): "<<p.begin(&buffer);
             p.begin(&buffer);
             p.setRenderHint(QPainter::Antialiasing);
+#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
             p.setRenderHint(QPainter::HighQualityAntialiasing);
+#endif
             p.setRenderHint(QPainter::TextAntialiasing);
             m_mathText->draw(p,alignment(), QRectF(QPointF(0,0), size));
             p.end();

lib/jkqtmathtext/jkqtmathtext.h

@@ -1194,14 +1194,16 @@ class JKQTMATHTEXT_LIB_EXPORT JKQTMathText : public QObject {
 };
 
 
-
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
+inline size_t qHash(const JKQTMathText::tbrDataH& data, size_t /*seed=0*/) {
+#else
 inline uint qHash(const JKQTMathText::tbrDataH& data) {
+#endif
   return qHash(data.f.family())+qHash(data.text);
 }
 
 
 
-
 /*! \brief A QLabel-derived class that draws an equation with LaTeX markup using JKQTMathText
     \ingroup jkqtmathtext
 

lib/jkqtplotter/CMakeLists.txt

@@ -202,9 +202,15 @@ if(JKQtPlotter_BUILD_SHARED_LIBS)
     set_property(TARGET ${libsh_name} PROPERTY VERSION "${PROJECT_VERSION}")
     set_property(TARGET ${libsh_name} PROPERTY OUTPUT_NAME  "${libsh_name_decorated}")
     target_link_libraries(${libsh_name} PUBLIC Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Gui Qt${QT_VERSION_MAJOR}::Widgets Qt${QT_VERSION_MAJOR}::PrintSupport Qt${QT_VERSION_MAJOR}::Svg Qt${QT_VERSION_MAJOR}::Xml JKQTCommonSharedLib JKQTMathTextSharedLib)
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 11)
         set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
         target_compile_features(${libsh_name} PUBLIC cxx_std_11)
+    else()
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${libsh_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${libsh_name} PUBLIC cxx_std_17)
+    endif()
     target_compile_definitions(${libsh_name} PUBLIC JKQTPLOTTER_LIB_IN_DLL)
     target_compile_definitions(${libsh_name} PRIVATE JKQTPLOTTER_LIB_EXPORT_LIBRARY)
     if(MINGW)
@@ -229,8 +235,15 @@ if(JKQtPlotter_BUILD_STATIC_LIBS)
     add_library(${lib_name} STATIC ${SOURCES_BASE} ${SOURCES_GRAPHS} ${SOURCES_GUI} ${RESOURCES} ${HEADERS_BASE} ${HEADERS_GRAPHS} ${HEADERS_GUI})
     set_property(TARGET ${lib_name} PROPERTY VERSION "${PROJECT_VERSION}")
     set_property(TARGET ${lib_name} PROPERTY OUTPUT_NAME  "${lib_name_decorated}")
+    if(${QT_VERSION_MAJOR} VERSION_LESS "6")
         set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 11)
         set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${lib_name} PUBLIC cxx_std_11)
+    else()
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD 17)
+        set_property(TARGET ${lib_name} PROPERTY CXX_STANDARD_REQUIRED TRUE)
+        target_compile_features(${lib_name} PUBLIC cxx_std_17)
+    endif()
     if(MINGW)
       # COMPILER-SETTINGS FOR MINGW
       target_compile_options(${lib_name} PUBLIC -fexceptions)
@@ -239,7 +252,6 @@ if(JKQtPlotter_BUILD_STATIC_LIBS)
       target_compile_options(${lib_name} PUBLIC /EHsc)
       target_compile_definitions(${lib_name} PUBLIC NOMINMAX)
     endif()
-    target_compile_features(${lib_name} PUBLIC cxx_std_11)
     target_include_directories(${lib_name} PUBLIC
         $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/../>
         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>  

lib/jkqtplotter/LibTarget.cmake.in

@@ -6,8 +6,7 @@
 #
 
 # package requires Qt 5/6
-find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
+find_package(Qt@QT_VERSION_MAJOR@ COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
-find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui Widgets PrintSupport Svg Xml OpenGL REQUIRED)
 find_package(JKQTCommon@JKQTP_CURRENT_TARGET_SHAREDPART@Lib REQUIRED PATHS ${CMAKE_CURRENT_LIST_DIR} ${CMAKE_MODULE_PATH})
 find_package(JKQTMathText@JKQTP_CURRENT_TARGET_SHAREDPART@Lib REQUIRED PATHS ${CMAKE_CURRENT_LIST_DIR} ${CMAKE_MODULE_PATH})
 

lib/jkqtplotter/graphs/jkqtpcontour.cpp

@@ -25,6 +25,7 @@
 #include "jkqtcommon/jkqtpenhancedpainter.h"
 #include "jkqtplotter/jkqtplotter.h"
 #include "jkqtcommon/jkqtpgeometrytools.h"
+#include "jkqtcommon/jkqttools.h"
 #include <QDebug>
 #include <QImageWriter>
 #include <QFileDialog>
@@ -63,7 +64,7 @@ void JKQTPContourPlot::draw(JKQTPEnhancedPainter &painter)
 
     int64_t colChecksum=-1;
     if (data && Nx*Ny>0) {
-        colChecksum=static_cast<int64_t>(qChecksum(reinterpret_cast<const char*>(data), static_cast<int64_t>(Nx)*static_cast<int64_t>(Ny)* static_cast<int64_t>(getSampleSize()/sizeof(char))));
+        colChecksum=static_cast<int64_t>(jkqtp_checksum(reinterpret_cast<const char*>(data), static_cast<int64_t>(Nx)*static_cast<int64_t>(Ny)* static_cast<int64_t>(getSampleSize()/sizeof(char))));
     }
     /*if (parent && parent->getDatastore() && imageColumn>=0) {
         colChecksum=static_cast<int64_t>(parent->getDatastore()->getColumnChecksum(imageColumn));

lib/jkqtplotter/gui/jkqtpenhancedtableview.cpp

@@ -129,6 +129,26 @@ void JKQTPEnhancedTableView::copySelectionToExcel(int copyrole, bool storeHead)
     if (sel.size()==1) {
         QVariant vdata=sel[0].data(copyrole);
         QString txt="";
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+        switch (vdata.typeId()) {
+            case QMetaType::Int:
+            case QMetaType::LongLong:
+            case QMetaType::UInt:
+            case QMetaType::ULongLong:
+            case QMetaType::Bool:
+                txt=vdata.toString();
+                break;
+            case QMetaType::Double:
+                txt=loc.toString(vdata.toDouble());
+                break;
+            case QMetaType::QPointF:
+                txt=loc.toString(vdata.toPointF().x());
+                break;
+            default:
+                txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
+                break;
+        }
+#else
         switch (vdata.type()) {
             case QVariant::Int:
             case QVariant::LongLong:
@@ -147,6 +167,7 @@ void JKQTPEnhancedTableView::copySelectionToExcel(int copyrole, bool storeHead)
                 txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
                 break;
         }
+#endif
          QApplication::clipboard()->setText(txt);
     } else {
         QSet<int> rows, cols;
@@ -210,6 +231,26 @@ void JKQTPEnhancedTableView::copySelectionToExcel(int copyrole, bool storeHead)
             int c=collist.indexOf(sel[i].column());
             QVariant vdata=sel[i].data(copyrole);
             QString txt="";
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+            switch (vdata.typeId()) {
+                case QMetaType::Int:
+                case QMetaType::LongLong:
+                case QMetaType::UInt:
+                case QMetaType::ULongLong:
+                case QMetaType::Bool:
+                    txt=vdata.toString();
+                    break;
+                case QMetaType::Double:
+                    txt=loc.toString(vdata.toDouble());
+                    break;
+                case QMetaType::QPointF:
+                    txt=loc.toString(vdata.toPointF().x());
+                    break;
+                default:
+                    txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
+                    break;
+            }
+#else
             switch (vdata.type()) {
                 case QVariant::Int:
                 case QVariant::LongLong:
@@ -228,6 +269,7 @@ void JKQTPEnhancedTableView::copySelectionToExcel(int copyrole, bool storeHead)
                     txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
                     break;
             }
+#endif
             int shift=0;
             if (storeHead) shift=1;
             if ((r>=0) && (c>=0) && (r<=data.size()) && (c<=colcnt))data[r+shift][c+shift]=txt;
@@ -256,6 +298,26 @@ void JKQTPEnhancedTableView::copySelectionToCSV(int copyrole, bool storeHead, co
     if (sel.size()==1) {
         QVariant vdata=sel[0].data(copyrole);
         QString txt="";
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+        switch (vdata.typeId()) {
+            case QMetaType::Int:
+            case QMetaType::LongLong:
+            case QMetaType::UInt:
+            case QMetaType::ULongLong:
+            case QMetaType::Bool:
+                txt=vdata.toString();
+                break;
+            case QMetaType::Double:
+                txt=JKQTPDoubleToQString(vdata.toDouble(), 15, 'g', decimalpoint);
+                break;
+            case QMetaType::QPointF:
+                txt=JKQTPDoubleToQString(vdata.toPointF().x(), 15, 'g', decimalpoint);
+                break;
+            default:
+                txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
+                break;
+        }
+#else
         switch (vdata.type()) {
             case QVariant::Int:
             case QVariant::LongLong:
@@ -274,6 +336,7 @@ void JKQTPEnhancedTableView::copySelectionToCSV(int copyrole, bool storeHead, co
                 txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
                 break;
         }
+#endif
          QApplication::clipboard()->setText(txt);
     } else {
         QSet<int> rows, cols;
@@ -337,6 +400,26 @@ void JKQTPEnhancedTableView::copySelectionToCSV(int copyrole, bool storeHead, co
             int c=collist.indexOf(sel[i].column());
             QVariant vdata=sel[i].data(copyrole);
             QString txt="";
+#if (QT_VERSION>=QT_VERSION_CHECK(6, 0, 0))
+                switch (vdata.typeId()) {
+                    case QMetaType::Int:
+                    case QMetaType::LongLong:
+                    case QMetaType::UInt:
+                    case QMetaType::ULongLong:
+                    case QMetaType::Bool:
+                        txt=vdata.toString();
+                        break;
+                    case QMetaType::Double:
+                        txt=JKQTPDoubleToQString(vdata.toDouble(), 15, 'g', decimalpoint);
+                        break;
+                    case QMetaType::QPointF:
+                        txt=JKQTPDoubleToQString(vdata.toPointF().x(), 15, 'g', decimalpoint);
+                        break;
+                    default:
+                        txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
+                        break;
+                }
+#else
             switch (vdata.type()) {
                 case QVariant::Int:
                 case QVariant::LongLong:
@@ -355,6 +438,7 @@ void JKQTPEnhancedTableView::copySelectionToCSV(int copyrole, bool storeHead, co
                     txt=QString("\"%1\"").arg(vdata.toString().replace('"', "''").replace('\n', "\\n ").replace('\r', "\\r ").replace('\t', " "));
                     break;
             }
+#endif
             int shift=0;
             if (storeHead) shift=1;
             if ((r>=0) && (c>=0) && (r<=data.size()) && (c<=colcnt))data[r+shift][c+shift]=txt;
@@ -568,7 +652,12 @@ QSizeF JKQTPEnhancedTableView::getTotalSize() const
 void JKQTPEnhancedTableView::paint(QPainter &painter, double scale, int page, double hhh, double vhw, const QList<int>& pageCols, const QList<int>& pageRows, QPrinter* p)
 {
     painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
-    QStyleOptionViewItem option = viewOptions();
+    QStyleOptionViewItem option;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    initViewItemOption(&option);
+#else
+    option = viewOptions();
+#endif
     painter.scale(scale, scale);
     QPen headerPen("black");
     headerPen.setWidth(2);

lib/jkqtplotter/jkqtpbaseplotter.cpp

@@ -778,29 +778,30 @@ void JKQTBasePlotter::calcPlotScaling(JKQTPEnhancedPainter& painter){
     internalPlotKeyBorderBottom=0;
     internalPlotKeyBorderLeft=0;
     internalPlotKeyBorderRight=0;
+    const qreal Xwid=kfm.boundingRect('X').width();
     if (plotterStyle.keyStyle.position==JKQTPKeyOutsideTopRight) {
-        internalPlotKeyBorderTop=keyHeight+2*plotterStyle.keyStyle.yMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*kfm.width('X')+2;
+        internalPlotKeyBorderTop=keyHeight+2*plotterStyle.keyStyle.yMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*Xwid+2;
         internalPlotBorderTop = internalPlotBorderTop + internalPlotKeyBorderTop;
     } else if (plotterStyle.keyStyle.position==JKQTPKeyOutsideTopLeft) {
-        internalPlotKeyBorderTop=keyHeight+2*plotterStyle.keyStyle.yMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*kfm.width('X')+2;
+        internalPlotKeyBorderTop=keyHeight+2*plotterStyle.keyStyle.yMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*Xwid+2;
         internalPlotBorderTop = internalPlotBorderTop + internalPlotKeyBorderTop;
     } else if (plotterStyle.keyStyle.position==JKQTPKeyOutsideLeftTop) {
-        internalPlotKeyBorderLeft=keyWidth+2*plotterStyle.keyStyle.xMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*kfm.width('X')+2;
+        internalPlotKeyBorderLeft=keyWidth+2*plotterStyle.keyStyle.xMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*Xwid+2;
         internalPlotBorderLeft = internalPlotBorderLeft + internalPlotKeyBorderLeft;
     } else if (plotterStyle.keyStyle.position==JKQTPKeyOutsideLeftBottom) {
-        internalPlotKeyBorderLeft=keyWidth+2*plotterStyle.keyStyle.xMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*kfm.width('X')+2;
+        internalPlotKeyBorderLeft=keyWidth+2*plotterStyle.keyStyle.xMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*Xwid+2;
         internalPlotBorderLeft = internalPlotBorderLeft + internalPlotKeyBorderLeft;
     } else if (plotterStyle.keyStyle.position==JKQTPKeyOutsideBottomRight) {
-        internalPlotKeyBorderBottom=keyHeight+2*plotterStyle.keyStyle.yMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*kfm.width('X')+2;
+        internalPlotKeyBorderBottom=keyHeight+2*plotterStyle.keyStyle.yMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*Xwid+2;
         internalPlotBorderBottom = internalPlotBorderBottom + internalPlotKeyBorderBottom;
     } else if (plotterStyle.keyStyle.position==JKQTPKeyOutsideBottomLeft) {
-        internalPlotKeyBorderBottom=keyHeight+2*plotterStyle.keyStyle.yMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*kfm.width('X')+2;
+        internalPlotKeyBorderBottom=keyHeight+2*plotterStyle.keyStyle.yMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.yOffset*Xwid+2;
         internalPlotBorderBottom = internalPlotBorderBottom + internalPlotKeyBorderBottom;
     } else if (plotterStyle.keyStyle.position==JKQTPKeyOutsideRightTop) {
-        internalPlotKeyBorderRight = keyWidth+2*plotterStyle.keyStyle.xMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*kfm.width('X')+2;
+        internalPlotKeyBorderRight = keyWidth+2*plotterStyle.keyStyle.xMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*Xwid+2;
         internalPlotBorderRight = internalPlotBorderRight + internalPlotKeyBorderRight;
     } else if (plotterStyle.keyStyle.position==JKQTPKeyOutsideRightBottom) {
-        internalPlotKeyBorderRight = keyWidth+2*plotterStyle.keyStyle.xMargin*kfm.width('X')+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*kfm.width('X')+2;
+        internalPlotKeyBorderRight = keyWidth+2*plotterStyle.keyStyle.xMargin*Xwid+ceil(2*plotterStyle.keyStyle.frameWidth)+plotterStyle.keyStyle.xOffset*Xwid+2;
         internalPlotBorderRight = internalPlotBorderRight + internalPlotKeyBorderRight;
     }
 
@@ -1052,13 +1053,14 @@ void JKQTBasePlotter::drawKey(JKQTPEnhancedPainter& painter) {
     QFont kf(plotterStyle.defaultFontName, 10);
     kf.setPointSizeF(plotterStyle.keyStyle.fontSize*fontSizeMultiplier);
     QFontMetricsF kfm(kf);
+    const qreal Xwid=kfm.boundingRect('X').width();
 
     // get the size of the key and if keyWidth>0 && keyHeight>0 draw the frame and the contents
     double keyWidth=0;
     double keyHeight=0;
     getKeyExtent(painter, &keyWidth, &keyHeight);
-    double keyRectangleWidth=keyWidth+2.0*plotterStyle.keyStyle.xMargin*kfm.width('X')+2.0*plotterStyle.keyStyle.frameWidth*lineWidthPrintMultiplier;
+    double keyRectangleWidth=keyWidth+2.0*plotterStyle.keyStyle.xMargin*Xwid+2.0*plotterStyle.keyStyle.frameWidth*lineWidthPrintMultiplier;
-    double keyRectangleHeight=keyHeight+2.0*plotterStyle.keyStyle.yMargin*kfm.width('X')+2.0*plotterStyle.keyStyle.frameWidth*lineWidthPrintMultiplier;
+    double keyRectangleHeight=keyHeight+2.0*plotterStyle.keyStyle.yMargin*Xwid+2.0*plotterStyle.keyStyle.frameWidth*lineWidthPrintMultiplier;
 
     if ((keyWidth>0) && (keyHeight>0)) {
         // key position
@@ -1067,64 +1069,64 @@ void JKQTBasePlotter::drawKey(JKQTPEnhancedPainter& painter) {
 
         // default: inside top-right
         double x0=internalPlotBorderLeft+internalPlotWidth-keyRectangleWidth;
-        double x=x0-plotterStyle.keyStyle.xOffset*kfm.width('X');
+        double x=x0-plotterStyle.keyStyle.xOffset*Xwid;
         double y0=internalPlotBorderTop;
-        double y=y0+plotterStyle.keyStyle.yOffset*kfm.width('X');
+        double y=y0+plotterStyle.keyStyle.yOffset*Xwid;
 
         switch(plotterStyle.keyStyle.position) {
             case JKQTPKeyOutsideTopRight:
                 x0=internalPlotBorderLeft+internalPlotWidth+internalPlotBorderRight-keyRectangleWidth;
-                x=x0-plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0-plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalTitleHeight;
-                y=y0+plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0+plotterStyle.keyStyle.yOffset*Xwid;
                 break;
 
             case JKQTPKeyOutsideTopLeft:
                 x0=internalPlotBorderLeft;
-                x=x0+plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0+plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalTitleHeight;
-                y=y0+plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0+plotterStyle.keyStyle.yOffset*Xwid;
                 break;
 
             case JKQTPKeyOutsideBottomRight:
                 x0=internalPlotBorderLeft+internalPlotWidth-keyRectangleWidth;
-                x=x0-plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0-plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop+internalPlotHeight+internalPlotBorderBottom-keyRectangleHeight;
-                y=y0-plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0-plotterStyle.keyStyle.yOffset*Xwid;
                 break;
             case JKQTPKeyOutsideBottomLeft:
                 x0=internalPlotBorderLeft;
-                x=x0+plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0+plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop+internalPlotHeight+internalPlotBorderBottom-keyRectangleHeight;
-                y=y0-plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0-plotterStyle.keyStyle.yOffset*Xwid;
                 break;
 
 
 
             case JKQTPKeyOutsideRightTop:
                 x0=internalPlotBorderLeft+internalPlotWidth+internalPlotBorderRight-keyRectangleWidth;
-                x=x0-plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0-plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop;
-                y=y0+plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0+plotterStyle.keyStyle.yOffset*Xwid;
                 break;
             case JKQTPKeyOutsideRightBottom:
                 x0=internalPlotBorderLeft+internalPlotWidth+internalPlotBorderRight-keyRectangleWidth;
-                x=x0-plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0-plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop+internalPlotHeight-keyRectangleHeight;
-                y=y0-plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0-plotterStyle.keyStyle.yOffset*Xwid;
                 break;
 
             case JKQTPKeyOutsideLeftTop:
                 x0=0;
-                x=x0+plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0+plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop;
-                y=y0+plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0+plotterStyle.keyStyle.yOffset*Xwid;
                 break;
             case JKQTPKeyOutsideLeftBottom:
                 x0=0;
-                x=x0+plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0+plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop+internalPlotHeight-keyRectangleHeight;
-                y=y0-plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0-plotterStyle.keyStyle.yOffset*Xwid;
                 break;
 
 
@@ -1132,27 +1134,27 @@ void JKQTBasePlotter::drawKey(JKQTPEnhancedPainter& painter) {
 
             case JKQTPKeyInsideBottomRight:
                 x0=internalPlotBorderLeft+internalPlotWidth-keyRectangleWidth;
-                x=x0-plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0-plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop+internalPlotHeight-keyRectangleHeight;
-                y=y0-plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0-plotterStyle.keyStyle.yOffset*Xwid;
                 break;
             case JKQTPKeyInsideBottomLeft:
                 x0=internalPlotBorderLeft;
-                x=x0+plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0+plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop+internalPlotHeight-keyRectangleHeight;
-                y=y0-plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0-plotterStyle.keyStyle.yOffset*Xwid;
                 break;
             case JKQTPKeyInsideTopLeft:
                 x0=internalPlotBorderLeft;
-                x=x0+plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0+plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop;
-                y=y0+plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0+plotterStyle.keyStyle.yOffset*Xwid;
                 break;
             case JKQTPKeyInsideTopRight:
                 x0=internalPlotBorderLeft+internalPlotWidth-keyRectangleWidth;
-                x=x0-plotterStyle.keyStyle.xOffset*kfm.width('X');
+                x=x0-plotterStyle.keyStyle.xOffset*Xwid;
                 y0=internalPlotBorderTop;
-                y=y0+plotterStyle.keyStyle.yOffset*kfm.width('X');
+                y=y0+plotterStyle.keyStyle.yOffset*Xwid;
                 break;
         }
         QRectF rectKey;
@@ -1177,8 +1179,8 @@ void JKQTBasePlotter::drawKey(JKQTPEnhancedPainter& painter) {
             } else {
                 painter.drawRoundedRect(rectKey, pt2px(painter, plotterStyle.keyStyle.frameRounding), pt2px(painter, plotterStyle.keyStyle.frameRounding));
             }
-            y=y+plotterStyle.keyStyle.yMargin*kfm.width('X')+plotterStyle.keyStyle.frameWidth*lineWidthMultiplier/2.0;
+            y=y+plotterStyle.keyStyle.yMargin*Xwid+plotterStyle.keyStyle.frameWidth*lineWidthMultiplier/2.0;
-            x=x+plotterStyle.keyStyle.xMargin*kfm.width('X')+plotterStyle.keyStyle.frameWidth*lineWidthMultiplier/2.0;
+            x=x+plotterStyle.keyStyle.xMargin*Xwid+plotterStyle.keyStyle.frameWidth*lineWidthMultiplier/2.0;
 
             painter.setPen(pf);
 
@@ -1229,7 +1231,9 @@ void JKQTBasePlotter::drawPlot(JKQTPEnhancedPainter& painter) {
         if (plotterStyle.widgetBackgroundBrush!=QBrush(Qt::transparent)) painter.fillRect(QRectF(0,0,widgetWidth/paintMagnification, widgetHeight/paintMagnification), plotterStyle.widgetBackgroundBrush);
     }
     QRectF rPlotBack(internalPlotBorderLeft, internalPlotBorderTop, internalPlotWidth, internalPlotHeight);
+#if QT_VERSION<QT_VERSION_CHECK(6,0,0)
     painter.setRenderHint(JKQTPEnhancedPainter::NonCosmeticDefaultPen, true);
+#endif
     painter.setRenderHint(JKQTPEnhancedPainter::Antialiasing, plotterStyle.useAntiAliasingForSystem);
     painter.setRenderHint(JKQTPEnhancedPainter::TextAntialiasing, plotterStyle.useAntiAliasingForText);
     if (plotterStyle.plotFrameVisible) {
@@ -1742,7 +1746,7 @@ bool JKQTBasePlotter::exportpreview(QSizeF pageSize, bool unitIsMM) {
     {
         QPalette p(scroll->palette());
         // Set background colour to black
-        p.setColor(QPalette::Background, Qt::darkGray);
+        p.setColor(QPalette::Window, Qt::darkGray);
         scroll->setPalette(p);
     }
     exportPreviewLabel=new QLabel(scroll);
@@ -1751,7 +1755,7 @@ bool JKQTBasePlotter::exportpreview(QSizeF pageSize, bool unitIsMM) {
     {
         QPalette p(exportPreviewLabel->palette());
         // Set background colour to black
-        p.setColor(QPalette::Background, Qt::darkGray);
+        p.setColor(QPalette::Window, Qt::darkGray);
         exportPreviewLabel->setPalette(p);
     }
 
@@ -3306,8 +3310,8 @@ void JKQTBasePlotter::copyData() {
         QTextStream txt(&result);
         QLocale loc=QLocale::system();
         loc.setNumberOptions(QLocale::OmitGroupSeparator);
-        QChar dp=loc.decimalPoint();
+        const auto dp=loc.decimalPoint();
-        QString sep="\t";
+        const QString sep="\t";
         datastore->saveCSV(txt, cols, sep, QString(dp), " ", "\"");
         txt.flush();
     }
@@ -3753,11 +3757,13 @@ void JKQTBasePlotter::saveAsPixelImage(const QString& filename, bool displayPrev
             png.fill(Qt::transparent);
             JKQTPEnhancedPainter painter;
             painter.begin(&png);
-            painter.setRenderHint(JKQTPEnhancedPainter::NonCosmeticDefaultPen, true);
             painter.setRenderHint(JKQTPEnhancedPainter::Antialiasing);
             painter.setRenderHint(JKQTPEnhancedPainter::TextAntialiasing);
             painter.setRenderHint(JKQTPEnhancedPainter::SmoothPixmapTransform);
+#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
+            painter.setRenderHint(JKQTPEnhancedPainter::NonCosmeticDefaultPen, true);
             painter.setRenderHint(JKQTPEnhancedPainter::HighQualityAntialiasing);
+#endif
 
             /*calcPlotScaling(painter);
             gridPaint(painter, png.rect().size());*/\
@@ -3809,11 +3815,13 @@ void JKQTBasePlotter::copyPixelImage() {
                 png.fill(Qt::transparent);
                 JKQTPEnhancedPainter painter;
                 painter.begin(&png);
-                painter.setRenderHint(JKQTPEnhancedPainter::NonCosmeticDefaultPen, true);
                 painter.setRenderHint(JKQTPEnhancedPainter::Antialiasing);
                 painter.setRenderHint(JKQTPEnhancedPainter::TextAntialiasing);
                 painter.setRenderHint(JKQTPEnhancedPainter::SmoothPixmapTransform);
+#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
+                painter.setRenderHint(JKQTPEnhancedPainter::NonCosmeticDefaultPen, true);
                 painter.setRenderHint(JKQTPEnhancedPainter::HighQualityAntialiasing);
+#endif
 
                 /*calcPlotScaling(painter);
                 gridPaint(painter, png.rect().size());*/
@@ -4136,21 +4144,22 @@ void JKQTBasePlotter::drawKeyContents(JKQTPEnhancedPainter& painter, double x, d
 #ifdef JKQTBP_AUTOTIMER
             jkaaot.write(QString("one-col: graph %1: %2").arg(i).arg(g->getTitle()));
 #endif
+            const auto Xwid=kfm.boundingRect('X').width();
             if (!g->getTitle().isEmpty() && g->isVisible()) {
                 QSizeF fs=getTextSizeSize(plotterStyle.defaultFontName,plotterStyle.keyStyle.fontSize*fontSizeMultiplier,g->getTitle(),painter);//  mt.getSize(painter);
-                double itheight=qMax(plotterStyle.keyStyle.itemHeight*kfm.width('X'), fs.height());
+                double itheight=qMax(plotterStyle.keyStyle.itemHeight*Xwid, fs.height());
-                QRectF markerRect(x, y+1.5*lineWidthMultiplier, plotterStyle.keyStyle.sampleLineLength*kfm.width('X'), itheight-3.0*lineWidthMultiplier);
+                QRectF markerRect(x, y+1.5*lineWidthMultiplier, plotterStyle.keyStyle.sampleLineLength*Xwid, itheight-3.0*lineWidthMultiplier);
                 g->drawKeyMarker(painter, markerRect);
                 mathText.setFontColor(plotterStyle.keyStyle.textColor);
                 mathText.setFontSize(plotterStyle.keyStyle.fontSize*fontSizeMultiplier);
                 mathText.setFontRomanOrSpecial(plotterStyle.defaultFontName);
 
                 mathText.parse(g->getTitle());
-                QRectF txtRect(x+(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation)*kfm.width('X'),y, key_text_width, itheight);
+                QRectF txtRect(x+(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation)*Xwid,y, key_text_width, itheight);
                 mathText.draw(painter, Qt::AlignLeft|Qt::AlignVCenter, txtRect);
                 //if (itheight<key_item_height*kfm.height()) itheight=key_item_height*kfm.height();
                 //y=y+itheight+(plotterStyle.keyStyle.ySeparation)*kfm.height();
-                y=y+key_text_height+(plotterStyle.keyStyle.ySeparation)*kfm.width('X');
+                y=y+key_text_height+(plotterStyle.keyStyle.ySeparation)*Xwid;
                 if (plotterStyle.debugShowRegionBoxes) {
                     painter.save(); auto __finalpaintinner=JKQTPFinally([&painter]() {painter.restore();});
                     QPen p("orange");
@@ -4174,16 +4183,17 @@ void JKQTBasePlotter::drawKeyContents(JKQTPEnhancedPainter& painter, double x, d
             jkaaot.write(QString("one-row: graph %1: %2").arg(i).arg(g->getTitle()));
 #endif
             if (!g->getTitle().isEmpty() && g->isVisible()) {
+                const auto Xwid=kfm.boundingRect('X').width();
                 QSizeF fs=getTextSizeSize(plotterStyle.defaultFontName,plotterStyle.keyStyle.fontSize*fontSizeMultiplier,g->getTitle(),painter);//  mt.getSize(painter);
-                double itheight=qMax(plotterStyle.keyStyle.itemHeight*kfm.width('X'), fs.height());
+                double itheight=qMax(plotterStyle.keyStyle.itemHeight*Xwid, fs.height());
-                QRectF markerRect(x, y+1.5*lineWidthMultiplier, plotterStyle.keyStyle.sampleLineLength*kfm.width('X'), itheight-3.0*lineWidthMultiplier);
+                QRectF markerRect(x, y+1.5*lineWidthMultiplier, plotterStyle.keyStyle.sampleLineLength*Xwid, itheight-3.0*lineWidthMultiplier);
                 g->drawKeyMarker(painter, markerRect);
                 mathText.setFontColor(plotterStyle.keyStyle.textColor);
                 mathText.setFontSize(plotterStyle.keyStyle.fontSize*fontSizeMultiplier);
                 mathText.setFontRomanOrSpecial(plotterStyle.defaultFontName);
 
                 mathText.parse(g->getTitle());
-                QRectF txtRect(x+(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation)*kfm.width('X'),y, fs.width(), itheight);
+                QRectF txtRect(x+(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation)*Xwid,y, fs.width(), itheight);
                 mathText.draw(painter, Qt::AlignLeft|Qt::AlignVCenter, txtRect);
                 if (plotterStyle.debugShowRegionBoxes) {
                     painter.save(); auto __finalpaintinner=JKQTPFinally([&painter]() {painter.restore();});
@@ -4199,11 +4209,11 @@ void JKQTBasePlotter::drawKeyContents(JKQTPEnhancedPainter& painter, double x, d
                 }
                 //if (itheight<key_item_height*kfm.height()) itheight=key_item_height*kfm.height();
                 //y=y+itheight+(plotterStyle.keyStyle.ySeparation)*kfm.height();
-                x=x+fs.width()+(2.0*plotterStyle.keyStyle.xSeparation+plotterStyle.keyStyle.sampleLineLength)*kfm.width('X');
+                x=x+fs.width()+(2.0*plotterStyle.keyStyle.xSeparation+plotterStyle.keyStyle.sampleLineLength)*Xwid;
             }
         }
     } else if (plotterStyle.keyStyle.layout==JKQTPKeyLayoutMultiColumn) {
-        //int columns=floor(static_cast<double>(plotWidth)/static_cast<double>(key_item_width*kfm.width('X')));
+        //int columns=floor(static_cast<double>(plotWidth)/static_cast<double>(key_item_width*Xwid));
         bool colfirst=true;
 
         if (plotterStyle.keyStyle.position==JKQTPKeyInsideTopLeft || plotterStyle.keyStyle.position==JKQTPKeyInsideTopRight
@@ -4215,6 +4225,7 @@ void JKQTBasePlotter::drawKeyContents(JKQTPEnhancedPainter& painter, double x, d
         int c=1;
         double xx=x;
         double yy=y;
+        const auto Xwid=kfm.boundingRect('X').width();
         for (int i=0; i<graphs.size(); i++) {
             JKQTPPlotElement* g=graphs[i];
 #ifdef JKQTBP_AUTOTIMER
@@ -4222,15 +4233,15 @@ void JKQTBasePlotter::drawKeyContents(JKQTPEnhancedPainter& painter, double x, d
 #endif
             if (!g->getTitle().isEmpty() && g->isVisible()) {
                 //QSizeF fs=getTextSizeSize(plotterStyle.defaultFontName,plotterStyle.keyStyle.fontSize*fontSizeMultiplier,g->getTitle(),painter);//  mt.getSize(painter);
-                double itheight=qMax(plotterStyle.keyStyle.itemHeight*kfm.width('X'), key_text_height);
+                double itheight=qMax(plotterStyle.keyStyle.itemHeight*Xwid, key_text_height);
-                QRectF markerRect(xx, yy+1.5*lineWidthMultiplier, plotterStyle.keyStyle.sampleLineLength*kfm.width('X'), itheight-3.0*lineWidthMultiplier);
+                QRectF markerRect(xx, yy+1.5*lineWidthMultiplier, plotterStyle.keyStyle.sampleLineLength*Xwid, itheight-3.0*lineWidthMultiplier);
                 g->drawKeyMarker(painter, markerRect);
                 mathText.setFontColor(plotterStyle.keyStyle.textColor);
                 mathText.setFontSize(plotterStyle.keyStyle.fontSize*fontSizeMultiplier);
                 mathText.setFontRomanOrSpecial(plotterStyle.defaultFontName);
                 mathText.parse(g->getTitle());
                 //QSizeF fs=mt.getSize(painter);
-                QRectF txtRect(xx+(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation)*kfm.width('X'),yy, key_text_width, key_text_height);
+                QRectF txtRect(xx+(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation)*Xwid,yy, key_text_width, key_text_height);
                 mathText.draw(painter, Qt::AlignLeft|Qt::AlignVCenter, txtRect);
 
                 if (plotterStyle.debugShowRegionBoxes) {
@@ -4247,26 +4258,26 @@ void JKQTBasePlotter::drawKeyContents(JKQTPEnhancedPainter& painter, double x, d
                 }
 
                 if (colfirst) {
-                    yy=yy+key_text_height+(plotterStyle.keyStyle.ySeparation)*kfm.width('X');
+                    yy=yy+key_text_height+(plotterStyle.keyStyle.ySeparation)*Xwid;
                     l++;
                     if (l>lines) {
                         l=1;
                         c++;
-                        xx=xx+key_text_width+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');
+                        xx=xx+key_text_width+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*Xwid;
-                        /*if (plotterStyle.keyStyle.autosize) xx=xx+key_text_width+(key_line_length+3.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');
+                        /*if (plotterStyle.keyStyle.autosize) xx=xx+key_text_width+(key_line_length+3.0*plotterStyle.keyStyle.xSeparation)*Xwid;
-                        else xx=xx+(key_item_width+2.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');*/
+                        else xx=xx+(key_item_width+2.0*plotterStyle.keyStyle.xSeparation)*Xwid;*/
                         yy=y;
                     }
                 } else {
-                    /*if (plotterStyle.keyStyle.autosize) xx=xx+key_text_width+(key_line_length+3.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');
+                    /*if (plotterStyle.keyStyle.autosize) xx=xx+key_text_width+(key_line_length+3.0*plotterStyle.keyStyle.xSeparation)*Xwid;
-                    else xx=xx+(key_item_width+2.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');*/
+                    else xx=xx+(key_item_width+2.0*plotterStyle.keyStyle.xSeparation)*Xwid;*/
-                    xx=xx+key_text_width+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');
+                    xx=xx+key_text_width+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*Xwid;
                     c++;
                     if (c>columns) {
                         c=1;
                         l++;
                         //yy=yy+(key_item_height+plotterStyle.keyStyle.ySeparation)*kfm.height();
-                        yy=yy+itheight+(plotterStyle.keyStyle.ySeparation)*kfm.width('X');
+                        yy=yy+itheight+(plotterStyle.keyStyle.ySeparation)*Xwid;
                         xx=x;
                     }
                 }
@@ -4288,7 +4299,8 @@ void JKQTBasePlotter::getKeyExtent(JKQTPEnhancedPainter& painter, double* width,
     f.setFamily(plotterStyle.defaultFontName);
     f.setPointSizeF(plotterStyle.keyStyle.fontSize*fontSizeMultiplier);
     QFontMetricsF kfm(f);
-    if (text_height!=nullptr) *text_height=plotterStyle.keyStyle.itemHeight*kfm.width('X');
+    const qreal Xwid=kfm.boundingRect('X').width();
+    if (text_height!=nullptr) *text_height=plotterStyle.keyStyle.itemHeight*Xwid;
     if (plotterStyle.keyStyle.layout==JKQTPKeyLayoutOneColumn) {
         int keyHeight=graphs.size();
         double w=0;
@@ -4306,18 +4318,18 @@ void JKQTBasePlotter::getKeyExtent(JKQTPEnhancedPainter& painter, double* width,
                 QSizeF fs=getTextSizeSize(plotterStyle.defaultFontName, plotterStyle.keyStyle.fontSize*fontSizeMultiplier, graphs[i]->getTitle(), painter);
                 if (fs.width()>w) w=fs.width();
                 if (text_height && fs.height()>*text_height) *text_height=fs.height();
-                h=h+qMax(plotterStyle.keyStyle.itemHeight*kfm.width('X'), fs.height())+plotterStyle.keyStyle.ySeparation*kfm.width('X');
+                h=h+qMax(plotterStyle.keyStyle.itemHeight*Xwid, fs.height())+plotterStyle.keyStyle.ySeparation*Xwid;
             }
         }
         if (plotterStyle.keyStyle.autosize) {
-            if (width) *width=w+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');
+            if (width) *width=w+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*Xwid;
-            if (text_width!=nullptr) *text_width=w+2.0*kfm.width('X');
+            if (text_width!=nullptr) *text_width=w+2.0*Xwid;
         } else {
-            if (width) *width=plotterStyle.keyStyle.itemWidth*kfm.width('X');
+            if (width) *width=plotterStyle.keyStyle.itemWidth*Xwid;
-            if (text_width!=nullptr) *text_width=(plotterStyle.keyStyle.itemWidth-(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation))*kfm.width('X');
+            if (text_width!=nullptr) *text_width=(plotterStyle.keyStyle.itemWidth-(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation))*Xwid;
         }
-        if (h>plotterStyle.keyStyle.ySeparation*kfm.width('X')) h=h-plotterStyle.keyStyle.ySeparation*kfm.width('X');
+        if (h>plotterStyle.keyStyle.ySeparation*Xwid) h=h-plotterStyle.keyStyle.ySeparation*Xwid;
-        if (height) *height=h;//keyHeight*key_item_height*kfm.width('X');
+        if (height) *height=h;//keyHeight*key_item_height*Xwid;
         if (columns_count) *columns_count=1;
         if (lines_count) *lines_count=keyHeight;
     } else if (plotterStyle.keyStyle.layout==JKQTPKeyLayoutOneRow) {
@@ -4337,19 +4349,19 @@ void JKQTBasePlotter::getKeyExtent(JKQTPEnhancedPainter& painter, double* width,
                 QSizeF fs=getTextSizeSize(plotterStyle.defaultFontName, plotterStyle.keyStyle.fontSize*fontSizeMultiplier, graphs[i]->getTitle(), painter);
                 if (fs.height()>h) h=fs.height();
                 if (text_width && fs.width()>*text_width) *text_width=fs.width();
-                w=w+fs.width()+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X');
+                w=w+fs.width()+(plotterStyle.keyStyle.sampleLineLength+2.0*plotterStyle.keyStyle.xSeparation)*Xwid;
             }
         }
-        if (h<plotterStyle.keyStyle.itemHeight*kfm.width('X')) h=plotterStyle.keyStyle.itemHeight*kfm.width('X');
+        if (h<plotterStyle.keyStyle.itemHeight*Xwid) h=plotterStyle.keyStyle.itemHeight*Xwid;
         if (plotterStyle.keyStyle.autosize) {
             if (height) *height=h;
             if (text_height!=nullptr) *text_height=h;
         } else {
             if (height) *height=h;
-            if (text_height!=nullptr) *text_height=(plotterStyle.keyStyle.itemHeight-(plotterStyle.keyStyle.ySeparation))*kfm.width('X');
+            if (text_height!=nullptr) *text_height=(plotterStyle.keyStyle.itemHeight-(plotterStyle.keyStyle.ySeparation))*Xwid;
         }
-        if (w>(plotterStyle.keyStyle.xSeparation)*kfm.width('X')) w=w-(plotterStyle.keyStyle.xSeparation)*kfm.width('X');
+        if (w>(plotterStyle.keyStyle.xSeparation)*Xwid) w=w-(plotterStyle.keyStyle.xSeparation)*Xwid;
-        if (width) *width=w;//keyHeight*key_item_height*kfm.width('X');
+        if (width) *width=w;//keyHeight*key_item_height*Xwid;
         if (columns_count) *columns_count=keyWidth;
         if (lines_count) *lines_count=1;
     } else if (plotterStyle.keyStyle.layout==JKQTPKeyLayoutMultiColumn) {
@@ -4378,12 +4390,12 @@ void JKQTBasePlotter::getKeyExtent(JKQTPEnhancedPainter& painter, double* width,
 
         if (text_height) {
             if (plotterStyle.keyStyle.autosize) *text_height=txtH;
-            else *text_height=plotterStyle.keyStyle.itemHeight*kfm.width('X');
+            else *text_height=plotterStyle.keyStyle.itemHeight*Xwid;
         }
 
 
-        double columns=floor(double(internalPlotWidth)/(w+(2.0*plotterStyle.keyStyle.xSeparation+plotterStyle.keyStyle.sampleLineLength)*kfm.width('X')));
+        double columns=floor(double(internalPlotWidth)/(w+(2.0*plotterStyle.keyStyle.xSeparation+plotterStyle.keyStyle.sampleLineLength)*Xwid));
-        if (!plotterStyle.keyStyle.autosize) columns=floor(double(internalPlotWidth)/((plotterStyle.keyStyle.itemWidth+2.0*plotterStyle.keyStyle.xSeparation+plotterStyle.keyStyle.sampleLineLength)*kfm.width('X')));
+        if (!plotterStyle.keyStyle.autosize) columns=floor(double(internalPlotWidth)/((plotterStyle.keyStyle.itemWidth+2.0*plotterStyle.keyStyle.xSeparation+plotterStyle.keyStyle.sampleLineLength)*Xwid));
         columns=qMin(columns, keyHeight);
         int lines=static_cast<int>(ceil(static_cast<double>(keyHeight)/static_cast<double>(columns)));
         lines=jkqtp_roundTo<int>(qMin(static_cast<double>(lines), keyHeight));
@@ -4391,9 +4403,9 @@ void JKQTBasePlotter::getKeyExtent(JKQTPEnhancedPainter& painter, double* width,
         if (plotterStyle.keyStyle.position==JKQTPKeyInsideTopLeft || plotterStyle.keyStyle.position==JKQTPKeyInsideTopRight
             || plotterStyle.keyStyle.position==JKQTPKeyOutsideTopLeft || plotterStyle.keyStyle.position==JKQTPKeyOutsideTopRight) {
             if (plotterStyle.keyStyle.autosize) {
-                lines=static_cast<int>(floor(static_cast<double>(internalPlotHeight)/static_cast<double>(txtH+(plotterStyle.keyStyle.ySeparation)*kfm.width('X'))));
+                lines=static_cast<int>(floor(static_cast<double>(internalPlotHeight)/static_cast<double>(txtH+(plotterStyle.keyStyle.ySeparation)*Xwid)));
             } else {
-                lines=static_cast<int>(floor(static_cast<double>(internalPlotHeight)/static_cast<double>((plotterStyle.keyStyle.itemHeight+plotterStyle.keyStyle.ySeparation)*kfm.width('X'))));
+                lines=static_cast<int>(floor(static_cast<double>(internalPlotHeight)/static_cast<double>((plotterStyle.keyStyle.itemHeight+plotterStyle.keyStyle.ySeparation)*Xwid)));
             }
             columns=static_cast<int>(ceil(static_cast<double>(keyHeight)/static_cast<double>(lines)));
             lines=jkqtp_roundTo<int>(qMin(static_cast<double>(lines), keyHeight));
@@ -4404,15 +4416,15 @@ void JKQTBasePlotter::getKeyExtent(JKQTPEnhancedPainter& painter, double* width,
         if (lines_count) *lines_count=lines;
 
         if (plotterStyle.keyStyle.autosize) {
-            if (width) *width=(w+(plotterStyle.keyStyle.sampleLineLength+3.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X'))*columns;
+            if (width) *width=(w+(plotterStyle.keyStyle.sampleLineLength+3.0*plotterStyle.keyStyle.xSeparation)*Xwid)*columns;
-            if (height) *height=lines*(txtH+plotterStyle.keyStyle.ySeparation*kfm.width('X'));
+            if (height) *height=lines*(txtH+plotterStyle.keyStyle.ySeparation*Xwid);
-            if (lines>0) *height=*height-plotterStyle.keyStyle.ySeparation*kfm.width('X');
+            if (lines>0) *height=*height-plotterStyle.keyStyle.ySeparation*Xwid;
             if (text_width!=nullptr) *text_width=w;
         } else {
-            if (width) *width=(plotterStyle.keyStyle.itemWidth+2.0*plotterStyle.keyStyle.xSeparation)*kfm.width('X')*columns;
+            if (width) *width=(plotterStyle.keyStyle.itemWidth+2.0*plotterStyle.keyStyle.xSeparation)*Xwid*columns;
-            if (height) *height=lines*(plotterStyle.keyStyle.itemHeight+plotterStyle.keyStyle.ySeparation)*kfm.width('X');
+            if (height) *height=lines*(plotterStyle.keyStyle.itemHeight+plotterStyle.keyStyle.ySeparation)*Xwid;
-            if (lines>0) *height=*height-plotterStyle.keyStyle.ySeparation*kfm.width('X');
+            if (lines>0) *height=*height-plotterStyle.keyStyle.ySeparation*Xwid;
-            if (text_width!=nullptr) *text_width=(plotterStyle.keyStyle.itemWidth-(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation))*kfm.width('X');
+            if (text_width!=nullptr) *text_width=(plotterStyle.keyStyle.itemWidth-(plotterStyle.keyStyle.sampleLineLength+plotterStyle.keyStyle.xSeparation))*Xwid;
         }
 #ifdef SHOW_JKQTPLOTTER_DEBUG
         qDebug()<<"getKeyExtent(): mult-column: columns="<<columns<<"  lines="<<lines;
@@ -5019,7 +5031,14 @@ bool JKQTPPaintDeviceAdapter::useLatexParser() const
 
 QPaintDevice *JKQTPPaintDeviceAdapter::createPaintdeviceMM(const QString &filename, double widthMM, double heightMM) const
 {
-    return createPaintdevice(filename, jkqtp_roundTo<int>(widthMM/25.4*QApplication::desktop()->logicalDpiX()), jkqtp_roundTo<int>(heightMM/25.4*QApplication::desktop()->logicalDpiY()));
+#if QT_VERSION>=QT_VERSION_CHECK(6,0,0)
+    const qreal dpix=qGuiApp->primaryScreen()->logicalDotsPerInchX();
+    const qreal dpiy=qGuiApp->primaryScreen()->logicalDotsPerInchY();
+#else
+    const qreal dpix=QApplication::desktop()->logicalDpiX();
+    const qreal dpiy=QApplication::desktop()->logicalDpiY();
+#endif
+    return createPaintdevice(filename, jkqtp_roundTo<int>(widthMM/25.4*dpix), jkqtp_roundTo<int>(heightMM/25.4*dpiy));
 }
 
 JKQTPSaveDataAdapter::~JKQTPSaveDataAdapter() = default;

lib/jkqtplotter/jkqtpbaseplotter.h

@@ -2130,7 +2130,11 @@ class JKQTPLOTTER_LIB_EXPORT JKQTBasePlotter: public QObject {
 /** \brief qHash()-specialization
  *   \ingroup jkqtpplottersupprt
  */
-inline uint qHash(const JKQTBasePlotter::textSizeKey& data) {
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
+inline size_t qHash(const JKQTBasePlotter::textSizeKey& data, size_t /*seed=0*/) {
+#else
+inline uint qHash(const JKQTBasePlotter::textSizeKey& data, uint /*seed=0*/) {
+#endif
     return qHash(data.f.family())+qHash(data.text);
 }
 

lib/jkqtplotter/jkqtpdatastorage.cpp

@@ -1056,7 +1056,7 @@ void JKQTPDatastore::saveCSV(QTextStream& txt, const QSet<int>& userColumns, con
     // find out the decimal and the thousand separator
     QLocale loc=QLocale::c();
     loc.setNumberOptions(QLocale::OmitGroupSeparator);
-    QChar dsep=loc.decimalPoint();
+    const auto dsep=loc.decimalPoint();
 
 
     txt.setLocale(loc);

lib/jkqtplotter/jkqtpdatastorage.h

@@ -22,6 +22,7 @@
 #include "jkqtplotter/jkqtplotter_imexport.h"
 #include "jkqtplotter/jkqtptools.h"
 #include "jkqtcommon/jkqtpdebuggingtools.h"
+#include "jkqtcommon/jkqttools.h"
 #include <vector>
 #include <cmath>
 #include <iostream>
@@ -2518,7 +2519,7 @@ quint16 JKQTPColumn::calculateChecksum() const
 {
     if (!datastore) return 0;
     if (!datastore->getItem(datastoreItem)) return 0;
-    return qChecksum(reinterpret_cast<const char*>(getPointer(0)), static_cast<uint>(getRows()*sizeof(double)));
+    return jkqtp_checksum(reinterpret_cast<const char*>(getPointer(0)), static_cast<uint>(getRows()*sizeof(double)));
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////

lib/jkqtplotter/jkqtpgraphsbase.cpp

@@ -59,7 +59,9 @@ QImage JKQTPPlotElement::generateKeyMarker(QSize size)
         painter.setRenderHint(QPainter::Antialiasing, true);
         painter.setRenderHint(QPainter::TextAntialiasing, true);
         painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
+#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
         painter.setRenderHint(QPainter::HighQualityAntialiasing, true);
+#endif
         QRectF rect(0,0,size.width(),size.height());
         drawKeyMarker(painter, rect);
     }
@@ -414,6 +416,7 @@ void JKQTPXYGraph::setXYColumns(int xCol, int yCol)
     setYColumn(yCol);
 }
 
+#if QT_VERSION<QT_VERSION_CHECK(6,0,0)
 void JKQTPXYGraph::setXYColumns(std::pair<int, int> xyColPair)
 {
     setXColumn(xyColPair.first);
@@ -425,6 +428,7 @@ void JKQTPXYGraph::setXYColumns(std::pair<size_t, size_t> xyColPair)
     setXColumn(xyColPair.first);
     setYColumn(xyColPair.second);
 }
+#endif
 
 void JKQTPXYGraph::setXYColumns(QPair<int, int> xyColPair)
 {

lib/jkqtplotter/jkqtpgraphsbase.h

@@ -605,10 +605,12 @@ public slots:
     void setXYColumns(size_t xCol, size_t yCol);
     /** \brief sets xColumn and yColumn at the same time */
     void setXYColumns(int xCol, int yCol);
+#if QT_VERSION<QT_VERSION_CHECK(6,0,0)
     /** \brief sets xColumn and yColumn at the same time */
     void setXYColumns(std::pair<int,int> xyColPair);
     /** \brief sets xColumn and yColumn at the same time */
     void setXYColumns(std::pair<size_t,size_t> xyColPair);
+#endif
     /** \brief sets xColumn and yColumn at the same time */
     void setXYColumns(QPair<int,int> xyColPair);
     /** \brief sets xColumn and yColumn at the same time */

lib/jkqtplotter/jkqtplotter.cpp

@@ -479,7 +479,9 @@ void JKQTPlotter::paintUserAction() {
         image=oldImage;
         if (image.width()>0 && image.height()>0 && !image.isNull()) {
             JKQTPEnhancedPainter painter(&image);
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
             painter.setRenderHint(JKQTPEnhancedPainter::NonCosmeticDefaultPen, true);
+#endif
             painter.setRenderHint(JKQTPEnhancedPainter::Antialiasing, true);
             painter.setRenderHint(JKQTPEnhancedPainter::TextAntialiasing, true);
             painter.setPen(plotterStyle.userActionOverlayPen);
@@ -1437,12 +1439,12 @@ QAction* JKQTPlotter::getActMouseLeftAsToolTip() const {
 
 void JKQTPlotter::setOverrideMouseDragAction(Qt::MouseButton button, Qt::KeyboardModifiers modifier, JKQTPMouseDragActions action)
 {
-    registeredOverrideMouseDragActionModes.insert(qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier), action);
+    registeredOverrideMouseDragActionModes.insert(QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier), action);
 }
 
 void JKQTPlotter::resetOverrideMouseDragAction(Qt::MouseButton button, Qt::KeyboardModifiers modifier)
 {
-    registeredOverrideMouseDragActionModes.remove(qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier));
+    registeredOverrideMouseDragActionModes.remove(QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier));
 }
 
 void JKQTPlotter::setContextMenuMode(JKQTPContextMenuModes mode) {
@@ -1686,7 +1688,7 @@ JKQTPMouseDragActionsHashMapIterator JKQTPlotter::findMatchingMouseDragAction(Qt
     if (found) *found=false;
     JKQTPMouseDragActionsHashMapIterator it=registeredOverrideMouseDragActionModes.cbegin();
     while (it!=registeredOverrideMouseDragActionModes.cend() ) {
-        if (it.key()==qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifiers)) {
+        if (it.key()==QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifiers)) {
             if (found) *found=true;
             return it;
         }
@@ -1694,7 +1696,7 @@ JKQTPMouseDragActionsHashMapIterator JKQTPlotter::findMatchingMouseDragAction(Qt
     }
     it=plotterStyle.registeredMouseDragActionModes.cbegin();
     while (it!=plotterStyle.registeredMouseDragActionModes.cend() ) {
-        if (it.key()==qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifiers)) {
+        if (it.key()==QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifiers)) {
             if (found) *found=true;
             return it;
         }
@@ -1707,7 +1709,7 @@ JKQTPMouseDoubleClickActionsHashMapIterator JKQTPlotter::findMatchingMouseDouble
 {
     if (found) *found=false;
     for (JKQTPMouseDoubleClickActionsHashMapIterator it=plotterStyle.registeredMouseDoubleClickActions.cbegin(); it!=plotterStyle.registeredMouseDoubleClickActions.cend(); ++it) {
-        if (it.key()==qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifiers)) {
+        if (it.key()==QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifiers)) {
             if (found) *found=true;
             return it;
         }
@@ -1738,7 +1740,7 @@ void JKQTPlotter::setPlotUpdateEnabled(bool enable)
 
 void JKQTPlotter::registerMouseDragAction(Qt::MouseButton button, Qt::KeyboardModifiers modifier, JKQTPMouseDragActions action)
 {
-    plotterStyle.registeredMouseDragActionModes[qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier)]=action;
+    plotterStyle.registeredMouseDragActionModes[QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier)]=action;
     if (button==Qt::LeftButton && modifier==Qt::NoModifier) {
         actMouseLeftAsDefault->setChecked(true);
         resetMouseLeftAction();
@@ -1747,7 +1749,7 @@ void JKQTPlotter::registerMouseDragAction(Qt::MouseButton button, Qt::KeyboardMo
 
 void JKQTPlotter::deregisterMouseDragAction(Qt::MouseButton button, Qt::KeyboardModifiers modifier)
 {
-    plotterStyle.registeredMouseDragActionModes.remove(qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier));
+    plotterStyle.registeredMouseDragActionModes.remove(QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier));
 }
 
 void JKQTPlotter::clearAllRegisteredMouseDragActions()
@@ -1757,12 +1759,12 @@ void JKQTPlotter::clearAllRegisteredMouseDragActions()
 
 void JKQTPlotter::registerMouseDoubleClickAction(Qt::MouseButton button, Qt::KeyboardModifiers modifier, JKQTPMouseDoubleClickActions action)
 {
-    plotterStyle.registeredMouseDoubleClickActions[qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier)]=action;
+    plotterStyle.registeredMouseDoubleClickActions[QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier)]=action;
 }
 
 void JKQTPlotter::deregisterMouseDoubleClickAction(Qt::MouseButton button, Qt::KeyboardModifiers modifier)
 {
-    plotterStyle.registeredMouseDoubleClickActions.remove(qMakePair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier));
+    plotterStyle.registeredMouseDoubleClickActions.remove(QPair<Qt::MouseButton, Qt::KeyboardModifiers>(button, modifier));
 }
 
 void JKQTPlotter::clearAllRegisteredMouseDoubleClickActions()

lib/jkqtplotter/jkqtplotter.h

@@ -1727,8 +1727,11 @@ QT_BEGIN_NAMESPACE
  *  \internal
  *  \ingroup jkqtpplottersupprt
 */
-template<>
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
-inline uint qHash(const QPair<Qt::MouseButton,Qt::KeyboardModifiers> &key, uint seed ) noexcept(noexcept(qHash(key.first, seed)) && noexcept(qHash(key.second, seed))) {
+inline size_t qHash(const QPair<Qt::MouseButton,Qt::KeyboardModifiers> &key, size_t seed=0) {
+#else
+inline uint qHash(const QPair<Qt::MouseButton,Qt::KeyboardModifiers> &key, uint seed=0) {
+#endif
     return static_cast<uint>(key.first)+static_cast<uint>(key.second);
 }
 
@@ -1736,8 +1739,11 @@ inline uint qHash(const QPair<Qt::MouseButton,Qt::KeyboardModifiers> &key, uint
  *  \internal
  *  \ingroup jkqtpplottersupprt
 */
-template<>
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
-inline uint qHash(const Qt::MouseButton &key, uint /*seed*/ ) noexcept(noexcept(qHash(key)))  {
+inline size_t qHash(const Qt::MouseButton &key, size_t /*seed=0*/) {
+#else
+inline uint qHash(const Qt::MouseButton &key, uint /*seed=0*/) {
+#endif
     return static_cast<uint>(key);
 }
 
@@ -1745,8 +1751,11 @@ inline uint qHash(const Qt::MouseButton &key, uint /*seed*/ ) noexcept(noexcept(
  *  \internal
  *  \ingroup jkqtpplottersupprt
 */
-template<>
+#if QT_VERSION >= QT_VERSION_CHECK(6,0,0)
-inline uint qHash(const Qt::KeyboardModifiers &key, uint /*seed*/ ) noexcept(noexcept(qHash(key)))  {
+inline size_t qHash(const Qt::KeyboardModifiers &key, size_t /*seed=0*/) {
+#else
+inline uint qHash(const Qt::KeyboardModifiers &key, uint /*seed=0*/) {
+#endif
     return static_cast<uint>(key);
 }