NEW: added JKQTBasePlotter::grabPixelImage() and JKQTPlotter::grabPixelImage(), which grab the plotter into a QImage

NEW: added option to not display the preview dialog to JKQTBasePlotter::copyPixelImage() and JKQTPlotter::copyPixelImage()

doc/dox/whatsnew.dox

@@ -35,6 +35,8 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>NEW: improved plotting speed for line-graphs by a compression algorithm (see JKQTPGraphLinesCompressionMixin) that removes overlaying lines (e.g. in JKQTPXYLineGraph)</li>
     <li>NEW: improved plotting speed for line-graphs by a clipping algorithm (applies to JKQTPXYLineGraph, JKQTPGraphErrorStyleMixin, JKQTPSpecialLineHorizontalGraph, JKQTPSpecialLineVerticalGraph and others)</li>
     <li>NEW: improved plotting speed for scatter-graphs by not calling draw functions for symbols outside the plot window (e.g. in JKQTPXYLineGraph)</li>
+    <li>NEW: added JKQTBasePlotter::grabPixelImage() and JKQTPlotter::grabPixelImage(), which grab the plotter into a QImage</li>
+    <li>NEW: added option to not display the preview dialog to JKQTBasePlotter::copyPixelImage() and JKQTPlotter::copyPixelImage()</li>
   </ul></li>
   
   <li>JKQTMathText:<ul>

lib/jkqtplotter/jkqtpbaseplotter.cpp

@@ -3851,41 +3851,21 @@ void JKQTBasePlotter::saveAsPixelImage(const QString& filename, bool displayPrev
     }
 }
 
-
+QImage JKQTBasePlotter::grabPixelImage(QSize size, bool showPreview)
-void JKQTBasePlotter::copyPixelImage() {
+{
-    /*qDebug()<<gridPrintingSize.width()<<", "<<gridPrintingSize.height();
-    qDebug()<<widgetWidth<<", "<<widgetHeight;
-    qDebug()<<paintMagnification;*/
-   /* QImage png(gridPrintingSize, QImage::Format_ARGB32);
-    {
-        JKQTPEnhancedPainter painter;
-        painter.begin(&png);
-        painter.setRenderHint(JKQTPEnhancedPainter::Antialiasing);
-        painter.setRenderHint(JKQTPEnhancedPainter::TextAntialiasing);
-        painter.setRenderHint(JKQTPEnhancedPainter::SmoothPixmapTransform);
-        painter.setRenderHint(JKQTPEnhancedPainter::HighQualityAntialiasing);
-        //calcPlotScaling(painter);
-        gridPaint(painter, gridPrintingSize);
-        painter.end();
-    }
-
-    QClipboard *clipboard = QApplication::clipboard();
-    qDebug()<<"clipboard before adding content:\n"<<clipboard->mimeData()->formats();
-    clipboard->setImage(png);
-    qDebug()<<"clipboard after adding content:\n"<<clipboard->mimeData()->formats();
-
-*/
-
     gridPrintingCalc();
     //std::cout<<gridPrintingSize.width()<<", "<<gridPrintingSize.height()<<std::endl;
     printSizeX_Millimeter=gridPrintingSize.width();
     printSizeY_Millimeter=gridPrintingSize.height();
+    if (!showPreview) {
+        printSizeX_Millimeter=widgetWidth;
+        printSizeY_Millimeter=widgetHeight;
+    }
+    if (!showPreview||exportpreview(gridPrintingSize, false)) {
 
-    if (exportpreview(gridPrintingSize, false)) {
         QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
-
+        if (size.isEmpty() || size.isNull() || !size.isValid() || size.width()*size.height()==0) size=QSizeF(double(printSizeX_Millimeter), double(printSizeY_Millimeter)).toSize();
-        //if (exportpreview(gridPrintingSize, false)) {
+        QImage png(size, QImage::Format_ARGB32);
-        QImage png(QSizeF(double(printSizeX_Millimeter), double(printSizeY_Millimeter)).toSize(), QImage::Format_ARGB32);
         {
             png.fill(Qt::transparent);
             JKQTPEnhancedPainter painter;
@@ -3893,16 +3873,35 @@ void JKQTBasePlotter::copyPixelImage() {
             painter.setRenderHint(JKQTPEnhancedPainter::Antialiasing);
             painter.setRenderHint(JKQTPEnhancedPainter::TextAntialiasing);
             painter.setRenderHint(JKQTPEnhancedPainter::SmoothPixmapTransform);
-#if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
+    #if (QT_VERSION<QT_VERSION_CHECK(6, 0, 0))
             painter.setRenderHint(JKQTPEnhancedPainter::NonCosmeticDefaultPen, true);
             painter.setRenderHint(JKQTPEnhancedPainter::HighQualityAntialiasing);
-#endif
+    #endif
 
             /*calcPlotScaling(painter);
             gridPaint(painter, png.rect().size());*/
             exportpreviewPaintRequested(painter, QSizeF(printSizeX_Millimeter, printSizeY_Millimeter).toSize());
             painter.end();
         }
+        QApplication::restoreOverrideCursor();
+
+        return png;
+    }
+    return QImage();
+
+}
+
+
+void JKQTBasePlotter::copyPixelImage(bool showPreview) {
+
+    gridPrintingCalc();
+    //std::cout<<gridPrintingSize.width()<<", "<<gridPrintingSize.height()<<std::endl;
+    printSizeX_Millimeter=gridPrintingSize.width();
+    printSizeY_Millimeter=gridPrintingSize.height();
+
+    if (!showPreview||exportpreview(gridPrintingSize, false)) {
+        QApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
+
         QByteArray svgdata;
             {
 
@@ -3926,6 +3925,28 @@ void JKQTBasePlotter::copyPixelImage() {
 
             }
 
+        if (!showPreview) {
+            printSizeX_Millimeter=widgetWidth;
+            printSizeY_Millimeter=widgetHeight;
+        }
+        QImage png(QSizeF(double(printSizeX_Millimeter), double(printSizeY_Millimeter)).toSize(), QImage::Format_ARGB32);
+            {
+                png.fill(Qt::transparent);
+                JKQTPEnhancedPainter painter;
+                painter.begin(&png);
+                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());*/
+                exportpreviewPaintRequested(painter, QSizeF(printSizeX_Millimeter, printSizeY_Millimeter).toSize());
+                painter.end();
+            }
 
 
 
@@ -3950,8 +3971,6 @@ void JKQTBasePlotter::copyPixelImage() {
 
 
         QApplication::restoreOverrideCursor();
-
-        //}
     }
 
 

lib/jkqtplotter/jkqtpbaseplotter.h

@@ -1314,8 +1314,10 @@ class JKQTPLOTTER_LIB_EXPORT JKQTBasePlotter: public QObject {
         /** \brief save the current plot as a pixel image image (PNG ...), if filename is empty a file selection dialog is displayed */
         void saveAsPixelImage(const QString& filename=QString(""), bool displayPreview=true, const QByteArray &outputFormat=QByteArray());
 
-        /** \brief copy the current plot as a pixel image to the clipboard */
+        /** \brief save the current plot as a pixel image into a QImage with the given size */
-        void copyPixelImage();
+        QImage grabPixelImage(QSize size=QSize(), bool showPreview=false);
+        /** \brief copy the current plot as a pixel+svg image to the clipboard */
+        void copyPixelImage(bool showPreview=true);
 
 #ifndef JKQTPLOTTER_COMPILE_WITHOUT_PRINTSUPPORT
         /** \brief save the current plot as a SVG file, with the current widget aspect ratio, if filename is empty a file selection dialog is displayed

lib/jkqtplotter/jkqtplotter.h

@@ -937,6 +937,14 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPlotter: public QWidget {
         /** \brief \copydoc actMouseLeftAsPanView */
         const QAction *getActMouseLeftAsPanView() const;
 
+        /** \brief save the current plot as a pixel image into a QImage with the given size */
+        inline QImage grabPixelImage(QSize size=QSize(), bool showPreview=false) {
+            return plotter->grabPixelImage(size,showPreview);
+        }
+        /** \brief copy the current plot as a pixel+svg image to the clipboard */
+        inline void copyPixelImage(bool showPreview=true) {
+            plotter->copyPixelImage(showPreview);
+        }
 
     public slots:
         /** \brief set the current plot magnification */
@@ -1041,6 +1049,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPlotter: public QWidget {
         inline void copyDataMatlab() {
             plotter->copyDataMatlab();
         }
+
+
         /** \brief this method zooms the graph so that all plotted datapoints are visible.
          *
          * \param zoomX if set \c true (default) zooms the x axis