added JKQTPCoordinateAxis::setRangeFixed() which disables changing th…

…e axis range (and thus the zoom)

add JKQTPCoordinateAxis::getMin() and JKQTPCoordinateAxis::getMax() getters

doc/dox/whatsnew.dox

@@ -137,6 +137,8 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>NEW: stacked barcharts may have a small separation (default 1pt)</li>
     <li>NEW: autoscaling for barcharts works now, also when stacked and unstacked charts are combined in one plot</li>
     <li>NEW: JKQTPGeoBezierCurve for drawing bezier curves of degree 1-4 (+example \ref JKQTPlotterGeometricBezier)</li>
+    <li>NEW: added JKQTPCoordinateAxis::setRangeFixed() which disables changing the axis range (and thus the zoom)</li>
+    <li>NEW: add JKQTPCoordinateAxis::getMin() and JKQTPCoordinateAxis::getMax() getters</li>
   </ul></li>
 
   <li>JKQTMathText:<ul>

examples/multithreaded/README.md

@@ -97,10 +97,10 @@ This test results in the following numbers (on my AMD Ryzen5 8/16-core laptop):
 <b>VERSION:</b> 5.0.0
 <b>BUILD MODE:</b> Release
 
-<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 12130.5ms<br/>single runtimes = (505.3 +/- 1773.2) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/><br/>  
+<u><b>SERIAL RESULTS:</b></u><br/>runtime, overall = 11182.4ms<br/>single runtimes = (465.8 +/- 1648.1) ms<br/>speedup = 1.00x<br/>threads / available = 1 / 16<br/><br/><br/>  
 
 <u><b>PARALLEL RESULTS:</b></u><br/>
-runtime, overall = 5495.3ms<br/>single runtimes = (1657.1 +/- 391.4) ms<br/>speedup = 7.24x<br/>threads / available = 8 / 16<br/>batch runs = 3<br/><br/><b>speedup vs. serial = 2.2x</b>
+runtime, overall = 5378.2ms<br/>single runtimes = (1639.8 +/- 416.7) ms<br/>speedup = 7.32x<br/>threads / available = 8 / 16<br/>batch runs = 3<br/><br/><b>speedup vs. serial = 2.1x</b>
 
 [comment]:RESULTS_END
 

lib/jkqtplotter/jkqtpcoordinateaxes.cpp

@@ -45,6 +45,7 @@ JKQTPCoordinateAxis::JKQTPCoordinateAxis(JKQTBasePlotter* _parent):
     parent(_parent),
     axismin(-10),
     axismax(10),
+    axisRangeFixed(false),
     axisabsoultemin(-DBL_MAX/100.),
     axisabsoultemax(DBL_MAX/100.0),
     axisStyle(),
@@ -671,6 +672,7 @@ void JKQTPCoordinateAxis::saveCurrentAxisStyle(QSettings &settings, const QStrin
 }
 
 void JKQTPCoordinateAxis::setRange(double aamin, double aamax) {
+    if (axisRangeFixed) return;
     const double oldamin=axismin;
     const double oldamax=axismax;
     double amin=std::min(aamin, aamax);
@@ -708,6 +710,21 @@ void JKQTPCoordinateAxis::setRange(double aamin, double aamax) {
     }
 }
 
+void JKQTPCoordinateAxis::setMin(double amin)
+{
+    setRange(amin, axismax);
+}
+
+void JKQTPCoordinateAxis::setMax(double amax)
+{
+    setRange(axismin, amax);
+}
+
+void JKQTPCoordinateAxis::setRangeFixed(bool fixed)
+{
+    axisRangeFixed=fixed;
+}
+
 void JKQTPCoordinateAxis::setNoAbsoluteRange() {
     axisabsoultemin=-DBL_MAX;
     axisabsoultemax=DBL_MAX;

lib/jkqtplotter/jkqtpcoordinateaxes.h

@@ -431,6 +431,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPCoordinateAxis: public QObject {
         /** \brief returns the current max */
         inline double getMax() const {return axismax; }
 
+        /** \brief returns whether the axis range is fixed, i.e. may not change! */
+        inline bool isAxisRangeFixed() const {return axisRangeFixed; }
+
         /** \brief returns the current absolute min */
         inline double getAbsoluteMin() const {return axisabsoultemin; }
 
@@ -498,8 +501,36 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPCoordinateAxis: public QObject {
         QString floattolabel(double data, int past_comma) const;
 
     public Q_SLOTS:
-        /** \brief set range of plot axis */
+        /** \brief set range of plot axis
+         *
+         *  \param amin new minimum
+         *  \param amax new maximum
+         *
+         *  \note the actually set range may differ from [amin...amax] in order to fullfill requirements e.g. for logarithmic axes or an absolute axis range (see setAbsoluteRange() )
+         *  \note if setRangeFixed(true) was called before this call, the axis range is fixed and this function has NO EFFECT!
+         */
         void setRange(double amin, double amax);
+        /** \brief set axis minimum range of plot axis
+         *
+         *  \param amin new minimum
+         *
+         *  \note the actually set range may differ from [amin...getMax()] in order to fullfill requirements e.g. for logarithmic axes or an absolute axis range (see setAbsoluteRange() )
+         *  \note if setRangeFixed(true) was called before this call, the axis range is fixed and this function has NO EFFECT!
+         */
+        void setMin(double amin);
+        /** \brief set axis minimum range of plot axis
+         *
+         *  \param amax new maximum
+         *
+         *  \note the actually set range may differ from [getMin()...amax] in order to fullfill requirements e.g. for logarithmic axes or an absolute axis range (see setAbsoluteRange() )
+         *  \note if setRangeFixed(true) was called before this call, the axis range is fixed and this function has NO EFFECT!
+         */
+        void setMax(double amax);
+        /** \brief fixes/ufixes the axis
+         *
+         *  a fixed axis's range (minimum/maximum) may not be changed by the user!)
+         */
+        void setRangeFixed(bool fixed);
         /** \brief sets absolutely limiting range of the plot
          *
          * The user (or programmer) cannot zoom to a viewport that is larger than the range given to this function.
@@ -753,6 +784,8 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPCoordinateAxis: public QObject {
         double axismin;
         /** \brief current view: maximum of axis */
         double axismax;
+        /** \brief indicates whether this axis is fixed, i.e. axismin and axismax are frozen to their current values */
+        bool axisRangeFixed;
 
         /** \brief absoulte minimum of axis (axismin/axismax xan not be set below this) */
         double axisabsoultemin;
@@ -904,7 +937,7 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPCoordinateAxis: public QObject {
         /** \brief calculate the position of the zero-axis (and whether to draw  it or not) */
         double getZeroAxisPos(bool*  drawZeroAxis=nullptr);
 
-        /** \brief figures out (possibly by probing the parent JKQTBasePloter), whether this axis is a secondary axis */
+        /** \brief figures out (possibly by probing the parent JKQTBasePlotter), whether this axis is a secondary axis */
         virtual bool isSecondaryAxis() const;