FIXED/NEW: placement of plot-title (was not centerd in its box, but glued to the bottom) by adding a plotstyle parameter JKQTBasePlotterStyle::plotLabelOffset

doc/dox/whatsnew.dox

@@ -39,6 +39,7 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>FIXED: fixes strange rendering with distortions (especially in text!), by correcting size calculation of internal image buffer</li>
     <li>FIXED: exporting gridPrinting plots when using only a JKQTBasePlotter</li>
     <li>FIXED: fixed impleentations of JKQTPlotter::beginGraphs(), which actually returned the end-iterator (COPY-PASTE-ERROR!!!)</li>
+    <li>FIXED/NEW: placement of plot-title (was not centerd in its box, but glued to the bottom) by adding a plotstyle parameter JKQTBasePlotterStyle::plotLabelOffset</li>
     <li>REORGANIZED: separated line-graphs from jkqtpscatter.h/.cpp into jkqtplines.h/.cpp</li>
     <li>IMPROVED: QT6-compatibility by removing deprecated warnings</li>
     <li>IMPROVED: added missing override declarations</li>

lib/jkqtplotter/jkqtpbaseplotter.cpp

@@ -821,8 +821,8 @@ void JKQTBasePlotter::calcPlotScaling(JKQTPEnhancedPainter& painter){
 
     if (!plotLabel.isEmpty()) {
         QSizeF s=getTextSizeSize(plotterStyle.plotLabelFontName, plotterStyle.plotLabelFontSize*fontSizeMultiplier, plotLabel, painter);
-        internalPlotBorderTop+=s.height()*1.2;
-        internalTitleHeight=s.height()*1.2;
+        internalTitleHeight=s.height()+2.0*pt2px(painter, plotterStyle.plotLabelOffset);
+        internalPlotBorderTop+=internalTitleHeight;
 
     }
 
@@ -1378,7 +1378,7 @@ void JKQTBasePlotter::drawPlot(JKQTPEnhancedPainter& painter) {
         double a=0,d=0,so=0,w=0;
         getTextSizeDetail(plotterStyle.plotLabelFontName,plotterStyle.plotLabelFontSize*fontSizeMultiplier,plotLabel, painter, w, a, d, so);
         QSizeF s=QSizeF(w, a+d);
-        mathText.draw(painter, internalPlotBorderLeft+(internalPlotWidth-s.width())/2.0,plotterStyle.plotBorderTop+a*1.2, plotterStyle.debugShowTextBoxes);
+        mathText.draw(painter, internalPlotBorderLeft+(internalPlotWidth-s.width())/2.0,plotterStyle.plotBorderTop+a+pt2px(painter, plotterStyle.plotLabelOffset), plotterStyle.debugShowTextBoxes);
         if (plotterStyle.debugShowRegionBoxes) {
             painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
             QPen p("blue");
@@ -2999,6 +2999,18 @@ double JKQTBasePlotter::getPlotLabelFontSize() const
     return this->plotterStyle.plotLabelFontSize;
 }
 
+void JKQTBasePlotter::setPlotLabelOffset(double __value)
+{
+    if (jkqtp_approximatelyUnequal(this->plotterStyle.plotLabelOffset , __value)) {
+        this->plotterStyle.plotLabelOffset = __value;
+        redrawPlot();
+    }
+}
+
+double JKQTBasePlotter::getPlotLabelOffset() const
+{
+    return this->plotterStyle.plotLabelOffset;
+}
 void JKQTBasePlotter::setPlotLabelColor(QColor __value)
 {
     if (this->plotterStyle.plotLabelColor != __value) {

lib/jkqtplotter/jkqtpbaseplotter.h

@@ -1137,6 +1137,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTBasePlotter: public QObject {
 
         /** \copydoc JKQTBasePlotterStyle::plotLabelFontSize */
         double getPlotLabelFontSize() const;
+        /** \copydoc JKQTBasePlotterStyle::plotLabelOffset */
+        double getPlotLabelOffset() const;
         /** \copydoc JKQTBasePlotterStyle::plotLabelFontName */
         QString getplotLabelFontName() const;
         /** \copydoc JKQTBasePlotterStyle::plotLabelColor */
@@ -2013,6 +2015,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTBasePlotter: public QObject {
         void setKeyLayout(const JKQTPKeyLayout & __value);
         /** \copydoc JKQTBasePlotterStyle::plotLabelFontSize */
         void setPlotLabelFontSize(double __value);
+        /** \copydoc JKQTBasePlotterStyle::plotLabelOffset */
+        void setPlotLabelOffset(double __value);
         /** \copydoc JKQTBasePlotterStyle::plotLabelFontName */
         void setplotLabelFontName(const QString & __value);
         /** \copydoc JKQTBasePlotterStyle::plotLabelColor */

lib/jkqtplotter/jkqtpbaseplotterstyle.cpp

@@ -23,6 +23,7 @@ JKQTBasePlotterStyle::JKQTBasePlotterStyle():
     plotFrameVisible(false),
     plotLabelFontName("GUI"),
     plotLabelFontSize(qCeil(QApplication::font().pointSizeF()*1.2)),
+    plotLabelOffset(qCeil(QApplication::font().pointSizeF()*0.4)),
     useAntiAliasingForSystem(true),
     useAntiAliasingForText(true),
     defaultTextColor(QColor("black")),
@@ -52,6 +53,7 @@ void JKQTBasePlotterStyle::loadSettings(const QSettings &settings, const QString
     debugTextBoxLineWidth=settings.value(group+"debug_textbox_linewidth", defaultStyle.debugTextBoxLineWidth).toDouble();
     plotLabelFontName=settings.value(group+"plot_label_font_name", defaultStyle.plotLabelFontName).toString();
     plotLabelFontSize=settings.value(group+"plot_label_font_size", defaultStyle.plotLabelFontSize).toDouble();
+    plotLabelOffset=settings.value(group+"plot_label_offset", defaultStyle.plotLabelOffset).toDouble();
     plotLabelColor=jkqtp_String2QColor(settings.value(group+"plot_label_color", jkqtp_QColor2String(defaultStyle.plotLabelColor)).toString());
     widgetBackgroundBrush=QBrush(jkqtp_String2QColor(settings.value(group+"widget_background_color", jkqtp_QColor2String(defaultStyle.widgetBackgroundBrush.color())).toString()));
     exportBackgroundBrush=QBrush(jkqtp_String2QColor(settings.value(group+"widget_background_color_for_export", jkqtp_QColor2String(defaultStyle.exportBackgroundBrush.color())).toString()));
@@ -100,6 +102,7 @@ void JKQTBasePlotterStyle::saveSettings(QSettings &settings, const QString &grou
     settings.setValue(group+"text_default_font_name", defaultFontName);
     settings.setValue(group+"plot_label_font_name", plotLabelFontName);
     settings.setValue(group+"plot_label_font_size", plotLabelFontSize);
+    settings.setValue(group+"plot_label_offset", plotLabelOffset);
     settings.setValue(group+"plot_label_color", jkqtp_QColor2String(plotLabelColor));
     settings.setValue(group+"plot_frame_visible", plotFrameVisible);
     settings.setValue(group+"plot_frame_color", jkqtp_QColor2String(plotFrameColor));

lib/jkqtplotter/jkqtpbaseplotterstyle.h

@@ -141,6 +141,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTBasePlotterStyle {
         double plotLabelFontSize;
         /** \brief the plot label color */
         QColor plotLabelColor;
+        /** \brief offset of the plot label from the next element [pt]. This offset is added below AND above the plot label! */
+        double plotLabelOffset;
         /** \brief specifies whether to use antialiasing for plotting the coordinate system */
         bool useAntiAliasingForSystem;
         /** \brief specifies whether to use antialiasing when drawing any text