BREAKING/FIXED: JKQTPXFunctionLineGraph and JKQTPYFunctionLineGraph do no longer contribute to auto-scaling, as that depends on the current plot-axes (hen-egg-problem).

doc/dox/whatsnew.dox

@@ -25,6 +25,7 @@ Changes, compared to  \ref page_whatsnew_V4_0_0 "v4.0.0" include:
     <li>BREAKING/REWORKED: Updated default styling of graphs. They are now more modern!</li>
     <li>BREAKING/REWORKED: Implement better/more access functions to the graphs (inlcuding sorting, moving up/down, appending/prepending, graphs-iterators ...), solves issue <a href="https://github.com/jkriege2/JKQtPlotter/pull/97">#97</a>, thanks to <a href="https://github.com/sim186">user:sim186</a> for bringing this up</li>
     <li>BREAKING/FIXED: fixed issue <a href="https://github.com/jkriege2/JKQtPlotter/pull/96">#96</a>: JKQTPlotter::saveAsPixelImage() does not add a border around the image any longer (can be reacivated by a new optional function parameter), thanks to <a href="https://github.com/nmielcarek">user:nmielcarek</a> for reporting</li>
+    <li>BREAKING/FIXED: JKQTPXFunctionLineGraph and JKQTPYFunctionLineGraph do no longer contribute to auto-scaling, as that depends on the current plot-axes (hen-egg-problem).</li>
     <li>FIXED/BREAKING: graph symbols were not properly applied when reading styles (in fact they were shuffled under some circumstances)</li>
     <li>FIXED issue described in <a href="https://github.com/jkriege2/JKQtPlotter/pull/62">#62: Fix custom labels draw, because giving exactly two label-strings did not display all of them</a>, thanks to <a href="https://github.com/FalsinSoft">user:FalsinSoft</a></li>
     <li>FIXED issue <a href="https://github.com/jkriege2/JKQtPlotter/pull/70">#70: Typo in jkqtplotter/CMakeLists.txt</a>, thanks to <a href="https://github.com/tedlinlab">user:tedlinlab</a></li>

lib/jkqtplotter/graphs/jkqtpevaluatedfunction.cpp

@@ -726,6 +726,16 @@ std::function<QPointF (double)> JKQTPXFunctionLineGraph::buildErrorFunctorSpec()
     return spec;
 }
 
+bool JKQTPXFunctionLineGraph::getXMinMax(double &minx, double &maxx, double &smallestGreaterZero)
+{
+    return false;
+}
+
+bool JKQTPXFunctionLineGraph::getYMinMax(double &miny, double &maxy, double &smallestGreaterZero)
+{
+    return false;
+}
+
 
 
 
@@ -825,6 +835,16 @@ std::function<QPointF (double)> JKQTPYFunctionLineGraph::buildErrorFunctorSpec()
     return spec;
 }
 
+bool JKQTPYFunctionLineGraph::getXMinMax(double &miny, double &maxy, double &smallestGreaterZero)
+{
+    return false;
+}
+
+bool JKQTPYFunctionLineGraph::getYMinMax(double &miny, double &maxy, double &smallestGreaterZero)
+{
+    return false;
+}
+
 
 
 

lib/jkqtplotter/graphs/jkqtpevaluatedfunction.h

@@ -281,6 +281,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPFunctorLineGraphBase: public JKQTPEvaluatedFun
 
     \image html plot_functionplots.png
 
+    \note Auto-scaling of the plot is deactivated (by overwriting getXMinMax() and getYMinMax() to return \c false ), as it depends on the axes (hen-egg-problem!)
+          Set the plot-ranges by hand!!!
+
     \see \ref JKQTPlotterFunctionPlots, JKQTPAdaptiveFunctionGraphEvaluator, JKQTPYFunctionLineGraph, JKQTPXYFunctionLineGraph, jkqtpstatAddPolyFit(), jkqtpstatAddWeightedRegression(), jkqtpstatAddRobustIRLSRegression(), jkqtpstatAddRegression(), jkqtpstatAddLinearWeightedRegression(), jkqtpstatAddRobustIRLSLinearRegression(), jkqtpstatAddLinearRegression()
  */
 class JKQTPLOTTER_LIB_EXPORT JKQTPXFunctionLineGraph: public JKQTPFunctorLineGraphBase {
@@ -320,6 +323,17 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXFunctionLineGraph: public JKQTPFunctorLineGra
         /** \copydoc JKQTPEvaluatedFunctionWithErrorsGraphBase::buildPlotFunctorSpec() */
         virtual std::function<QPointF(double)> buildErrorFunctorSpec() override;
 
+        /** \brief get the maximum and minimum x-value of the graph
+         *
+         * This functions returns 0 for both parameters, so that the plotter uses the predefined
+         * min and max values.
+         */
+        virtual bool getXMinMax(double& minx, double& maxx, double& smallestGreaterZero) override;
+        /** \brief get the maximum and minimum y-value of the graph
+         */
+        virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
+
+
 };
 
 /*! \brief This implements line plots where the data is taken from a user supplied function \f$ x=f(y) \f$
@@ -329,6 +343,9 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPXFunctionLineGraph: public JKQTPFunctorLineGra
 
     \image html functionplot_fy.png
 
+    \note Auto-scaling of the plot is deactivated (by overwriting getXMinMax() and getYMinMax() to return \c false ), as it depends on the axes (hen-egg-problem!)
+          Set the plot-ranges by hand!!!
+
     \see \ref JKQTPlotterFunctionPlots , JKQTPXFunctionLineGraph, JKQTPXYFunctionLineGraph
  */
 class JKQTPLOTTER_LIB_EXPORT JKQTPYFunctionLineGraph: public JKQTPFunctorLineGraphBase {
@@ -361,6 +378,15 @@ class JKQTPLOTTER_LIB_EXPORT JKQTPYFunctionLineGraph: public JKQTPFunctorLineGra
         /** \copydoc JKQTPEvaluatedFunctionWithErrorsGraphBase::buildPlotFunctorSpec() */
         virtual std::function<QPointF(double)> buildErrorFunctorSpec() override;
 
+
+        /** \brief get the maximum and minimum x-value of the graph
+         */
+        virtual bool getXMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
+        /** \brief get the maximum and minimum y-value of the graph
+         */
+        virtual bool getYMinMax(double& miny, double& maxy, double& smallestGreaterZero) override;
+
+
 };