Make QgsMapRendererCache protected members private

This class isn't designed to be subclassed

doc/api_break.dox

@@ -1335,6 +1335,11 @@ be returned instead of a null pointer if no transformation is required.
 - destinationSrsChanged() was renamed to destinationCrsChanged()
 - getCompositionMode(), getBlendModeEnum() and BlendMode enum have been moved to QgsPainting utility class.
 
+QgsMapRendererCache        {#qgis_api_break_3_0_QgsMapRendererCache}
+-------------------
+
+- All protected members have been made private. This class is not designed to be subclassed.
+
 
 QgsMapRendererJob        {#qgis_api_break_3_0_QgsMapRendererJob}
 -----------------

python/core/qgsmaprenderercache.sip

@@ -1,15 +1,3 @@
-
-/**
- * This class is responsible for keeping cache of rendered images of individual layers.
- *
- * Once a layer has rendered image stored in the cache (using setCacheImage(...)),
- * the cache listens to repaintRequested() signals from layer. If triggered, the cache
- * removes the rendered image (and disconnects from the layer).
- *
- * The class is thread-safe (multiple classes can access the same instance safely).
- *
- * @note added in 2.4
- */
 class QgsMapRendererCache : QObject
 {
 %TypeHeaderCode
@@ -20,27 +8,14 @@ class QgsMapRendererCache : QObject
 
     QgsMapRendererCache();
 
-    //! invalidate the cache contents
     void clear();
 
-    //! initialize cache: set new parameters and erase cache if parameters have changed
-    //! @return flag whether the parameters are the same as last time
     bool init( const QgsRectangle& extent, double scale );
 
-    //! set cached image for the specified layer ID
     void setCacheImage( const QString& layerId, const QImage& img );
 
-    //! get cached image for the specified layer ID. Returns null image if it is not cached.
     QImage cacheImage( const QString& layerId );
 
-    //! remove layer from the cache
     void clearCacheImage( const QString& layerId );
 
-  protected slots:
-    //! remove layer (that emitted the signal) from the cache
-    void layerRequestedRepaint();
-
-  protected:
-    //! invalidate cache contents (without locking)
-    void clearInternal();
 };

src/core/qgsmaprenderercache.h

@@ -42,31 +42,30 @@ class CORE_EXPORT QgsMapRendererCache : public QObject
 
     QgsMapRendererCache();
 
-    //! invalidate the cache contents
+    //! Invalidate the cache contents
     void clear();
 
-    //! initialize cache: set new parameters and erase cache if parameters have changed
+    //! Initialize cache: set new parameters and erase cache if parameters have changed
     //! @return flag whether the parameters are the same as last time
     bool init( const QgsRectangle& extent, double scale );
 
-    //! set cached image for the specified layer ID
+    //! Set the cached image for the specified layer ID
     void setCacheImage( const QString& layerId, const QImage& img );
 
-    //! get cached image for the specified layer ID. Returns null image if it is not cached.
+    //! Returns the cached image for the specified layer ID. Returns null image if it is not cached.
     QImage cacheImage( const QString& layerId );
 
-    //! remove layer from the cache
+    //! Removes a layer from the cache
     void clearCacheImage( const QString& layerId );
 
-  protected slots:
-    //! remove layer (that emitted the signal) from the cache
+  private slots:
+    //! Remove layer (that emitted the signal) from the cache
     void layerRequestedRepaint();
 
-  protected:
-    //! invalidate cache contents (without locking)
+  private:
+    //! Invalidate cache contents (without locking)
     void clearInternal();
 
-  protected:
     QMutex mMutex;
     QgsRectangle mExtent;
     double mScale;