Make outline only simple markers work with categorised/graduated

etc renderers (fix #15132)

python/core/symbology-ng/qgsmarkersymbollayerv2.sip

@@ -220,6 +220,8 @@ class QgsSimpleMarkerSymbolLayerV2 : QgsSimpleMarkerSymbolLayerBase
     void setOutlineColor( const QColor& color );
     QColor fillColor() const;
     void setFillColor( const QColor& color );
+    void setColor( const QColor& color );
+    virtual QColor color() const;
 
     // new methods
 

src/core/symbology-ng/qgsmarkersymbollayerv2.cpp

@@ -1516,6 +1516,32 @@ QRectF QgsSimpleMarkerSymbolLayerV2::bounds( QPointF point, QgsSymbolV2RenderCon
   return symbolBounds;
 }
 
+void QgsSimpleMarkerSymbolLayerV2::setColor( const QColor& color )
+{
+  if ( shapeIsFilled( mShape ) )
+  {
+    setFillColor( color );
+  }
+  else
+  {
+    setOutlineColor( color );
+  }
+}
+
+QColor QgsSimpleMarkerSymbolLayerV2::color() const
+{
+  if ( shapeIsFilled( mShape ) )
+  {
+    return fillColor();
+  }
+  else
+  {
+    return outlineColor();
+  }
+}
+
+
+
 
 //
 // QgsFilledMarkerSymbolLayer

src/core/symbology-ng/qgsmarkersymbollayerv2.h

@@ -257,8 +257,10 @@ class CORE_EXPORT QgsSimpleMarkerSymbolLayerV2 : public QgsSimpleMarkerSymbolLay
     QRectF bounds( QPointF point, QgsSymbolV2RenderContext& context ) override;
     QColor outlineColor() const override { return borderColor(); }
     void setOutlineColor( const QColor& color ) override { setBorderColor( color ); }
-    QColor fillColor() const override { return color(); }
-    void setFillColor( const QColor& color ) override { setColor( color ); }
+    QColor fillColor() const override { return mColor; }
+    void setFillColor( const QColor& color ) override { mColor = color; }
+    void setColor( const QColor& color ) override;
+    virtual QColor color() const override;
 
     // new methods
 

src/gui/symbology-ng/qgssymbollayerv2widget.cpp

@@ -493,7 +493,7 @@ void QgsSimpleMarkerSymbolLayerV2Widget::setSymbolLayer( QgsSymbolLayerV2* layer
   btnChangeColorBorder->setColor( mLayer->borderColor() );
   btnChangeColorBorder->blockSignals( false );
   btnChangeColorFill->blockSignals( true );
-  btnChangeColorFill->setColor( mLayer->color() );
+  btnChangeColorFill->setColor( mLayer->fillColor() );
   btnChangeColorFill->blockSignals( false );
   spinSize->blockSignals( true );
   spinSize->setValue( mLayer->size() );

tests/src/core/testqgssimplemarker.cpp

@@ -66,6 +66,7 @@ class TestQgsSimpleMarkerSymbol : public QObject
     void boundsWithOffset();
     void boundsWithRotation();
     void boundsWithRotationAndOffset();
+    void colors();
 
   private:
     bool mTestHasError;
@@ -251,6 +252,27 @@ void TestQgsSimpleMarkerSymbol::boundsWithRotationAndOffset()
   QVERIFY( result );
 }
 
+void TestQgsSimpleMarkerSymbol::colors()
+{
+  //test logic for setting/retrieving symbol color
+
+  QgsSimpleMarkerSymbolLayerV2 marker;
+  marker.setOutlineColor( QColor( 200, 200, 200 ) );
+  marker.setFillColor( QColor( 100, 100, 100 ) );
+
+  //start with a filled shape - color should be fill color
+  marker.setShape( QgsSimpleMarkerSymbolLayerBase::Circle );
+  QCOMPARE( marker.color(), QColor( 100, 100, 100 ) );
+  marker.setColor( QColor( 150, 150, 150 ) );
+  QCOMPARE( marker.fillColor(), QColor( 150, 150, 150 ) );
+
+  //now try with a non-filled (outline only) shape - color should be outline color
+  marker.setShape( QgsSimpleMarkerSymbolLayerBase::Cross );
+  QCOMPARE( marker.color(), QColor( 200, 200, 200 ) );
+  marker.setColor( QColor( 250, 250, 250 ) );
+  QCOMPARE( marker.outlineColor(), QColor( 250, 250, 250 ) );
+}
+
 //
 // Private helper functions not called directly by CTest
 //