partly fixed issue #99: for horizontal axes, additional space at the left and/or right of the plot is allowed so labels are no longer clipped (thanks to user:allenbarnett5 for reporting)

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>partly FIXED issue <a href="https://github.com/jkriege2/JKQtPlotter/pull/99">#99: Clipping of Tick Labels</a>: for horizontal axes, additional space at the left  and/or right of the plot is allowed so labels are no longer clipped (thanks to <a href="https://github.com/allenbarnett5">user:allenbarnett5/a> for reporting)</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>

lib/jkqtplotter/jkqtpbaseplotter.cpp

@@ -874,8 +874,12 @@ void JKQTBasePlotter::calcPlotScaling(JKQTPEnhancedPainter& painter){
     }*/
 
     // read additional size required for coordinate axes
-    QSizeF s=xAxis->getSize1(painter);
+    double elongateLeft=0,elongateRight=0;
+    double elongateMin=0,elongateMax=0;
+    QSizeF s=xAxis->getSize1(painter, &elongateMin, &elongateMax);
     internalPlotBorderBottom+=s.height();
+    if (elongateMin>0) elongateLeft=qMax(elongateLeft,elongateMin);
+    if (elongateMax>0) elongateRight=qMax(elongateRight,elongateMax);
     s=xAxis->getSize2(painter);
     internalPlotBorderTop+=s.height();
 
@@ -900,6 +904,9 @@ void JKQTBasePlotter::calcPlotScaling(JKQTPEnhancedPainter& painter){
         internalPlotBorderTop+=ax->getSize2(painter).height()+plotterStyle.secondaryAxisSeparation;
     }
 
+    if (internalPlotBorderRight<elongateRight) internalPlotBorderRight=elongateRight;
+    if (internalPlotBorderLeft<elongateLeft) internalPlotBorderLeft=elongateLeft;
+
     internalPlotBorderTop_notIncludingOutsidePlotSections=internalPlotBorderTop;
     internalPlotBorderLeft_notIncludingOutsidePlotSections=internalPlotBorderLeft;
     internalPlotBorderBottom_notIncludingOutsidePlotSections=internalPlotBorderBottom;

lib/jkqtplotter/jkqtpcoordinateaxes.cpp

@@ -1332,7 +1332,7 @@ std::pair<QSizeF,QSizeF> JKQTPVerticalAxisBase::getSize0(JKQTPEnhancedPainter& p
 }
 
 
-QSizeF JKQTPVerticalAxisBase::getSize1(JKQTPEnhancedPainter& painter) {
+QSizeF JKQTPVerticalAxisBase::getSize1(JKQTPEnhancedPainter& painter, double* elongateBottom, double *elongateTop) {
     if (axisStyle.drawMode1==JKQTPCADMnone) return QSize(0,0);
     double ptwidth=axisStyle.axisLineOffset;
     const double arrowSize=((axisStyle.drawMode1&(JKQTPCADMMinArrow|JKQTPCADMMinFilledArrow|JKQTPCADMMaxArrow|JKQTPCADMMaxFilledArrow))!=int(0))?(axisStyle.getArrowSize(painter, parent)/2.0):0.0;
@@ -2070,7 +2070,7 @@ std::pair<QSizeF,QSizeF> JKQTPHorizontalAxisBase::getSize0(JKQTPEnhancedPainter&
                 );
 }
 
-QSizeF JKQTPHorizontalAxisBase::getSize1(JKQTPEnhancedPainter& painter) {
+QSizeF JKQTPHorizontalAxisBase::getSize1(JKQTPEnhancedPainter& painter, double *elongateLeft, double *elongateRight) {
     if (axisStyle.drawMode1==JKQTPCADMnone) return QSize(0,0);
     double ptheight=axisStyle.axisLineOffset;
     const double arrowSize=((axisStyle.drawMode1&(JKQTPCADMMinArrow|JKQTPCADMMinFilledArrow|JKQTPCADMMaxArrow|JKQTPCADMMaxFilledArrow))!=int(0))?(axisStyle.getArrowSize(painter, parent)/2.0):0.0;
@@ -2079,7 +2079,20 @@ QSizeF JKQTPHorizontalAxisBase::getSize1(JKQTPEnhancedPainter& painter) {
     if (axisStyle.drawMode1.testFlag(JKQTPCADMTickLabels)) {
         ptheight+=axisStyle.tickLabelDistance;
         // find out the maximum width over all visible plot labels
-        labheight+=getMaxTickLabelSize(painter).height();
+        const QSizeF maxLabelSize=getMaxTickLabelSize(painter);
+        if (elongateLeft) {
+            if (getTickLabelAngle()<-0.0000001)
+                *elongateLeft=maxLabelSize.width();
+            else if (getTickLabelAngle()<0.0000001)
+                *elongateLeft=maxLabelSize.width()/2.0;
+        }
+        if (elongateRight) {
+            if (getTickLabelAngle()>0.0000001)
+                *elongateRight=maxLabelSize.width();
+            else if (getTickLabelAngle()>-0.0000001)
+                *elongateRight=maxLabelSize.width()/2.0;
+        }
+        labheight+=maxLabelSize.height();
     }
     if (axisStyle.drawMode1.testFlag(JKQTPCADMAxisLabel)) {
         ptheight+=axisStyle.labelDistance;

lib/jkqtplotter/jkqtpcoordinateaxes.h

@@ -246,7 +246,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPCoordinateAxis: public QObject {
         void addAxisTickLabels(const double* x, const QString* label, int items);
 
         /** \brief returns the size of the left/bottom axis in pixels */
-        virtual QSizeF getSize1(JKQTPEnhancedPainter& painter)=0;
+        virtual QSizeF getSize1(JKQTPEnhancedPainter& painter, double* elongateMin=nullptr, double* elongateMax=nullptr)=0;
 
         /** \brief returns the size of the right/top axis in pixels */
         virtual QSizeF getSize2(JKQTPEnhancedPainter& painter)=0;
@@ -900,7 +900,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPVerticalAxisBase: public JKQTPCoordinateAxis {
         JKQTPVerticalAxisBase(JKQTBasePlotter* parent);
 
         /** \brief returns the size of the left axis in pixels */
-        virtual QSizeF getSize1(JKQTPEnhancedPainter& painter) override;
+        virtual QSizeF getSize1(JKQTPEnhancedPainter& painter, double *elongateBottom=nullptr, double* elongateTop=nullptr) override;
 
         /** \brief returns the size of the right axis in pixels */
         virtual QSizeF getSize2(JKQTPEnhancedPainter& painter) override;
@@ -1081,7 +1081,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPHorizontalAxisBase: public JKQTPCoordinateAxis
         JKQTPHorizontalAxisBase(JKQTBasePlotter* parent);
 
         /** \brief returns the size of the bottom axis in pixels */
-        virtual QSizeF getSize1(JKQTPEnhancedPainter& painter) override;
+        virtual QSizeF getSize1(JKQTPEnhancedPainter& painter, double* elongateLeft=nullptr, double* elongateRight=nullptr) override;
 
         /** \brief returns the size of the top axis in pixels */
         virtual QSizeF getSize2(JKQTPEnhancedPainter& painter) override;