[composer] Add signal for when composition print resolution changes (sponsored by City of Uster, Switzerland)

Author: nyalldawson

python/core/composer/qgscomposition.sip

@@ -416,6 +416,9 @@ class QgsComposition : QGraphicsScene
     void paperSizeChanged();
     void nPagesChanged();
 
+    /**Is emitted when the compositions print resolution changes*/
+    void printResolutionChanged();
+
     /**Is emitted when selected item changed. If 0, no item is selected*/
     void selectedItemChanged( QgsComposerItem* selected );
     /**Is emitted when new composer arrow has been added to the view*/

src/core/composer/qgscomposition.cpp

@@ -507,6 +507,11 @@ const QgsComposerItem* QgsComposition::getComposerItemByUuid( QString theUuid )
   return 0;
 }
 
+void QgsComposition::setPrintResolution( int dpi )
+{
+  mPrintResolution = dpi;
+  emit printResolutionChanged();
+}
 
 void QgsComposition::setUseAdvancedEffects( bool effectsEnabled )
 {

src/core/composer/qgscomposition.h

@@ -241,7 +241,7 @@ class CORE_EXPORT QgsComposition : public QGraphicsScene
     const QgsComposerItem* getComposerItemByUuid( QString theUuid ) const;
 
     int printResolution() const {return mPrintResolution;}
-    void setPrintResolution( int dpi ) {mPrintResolution = dpi;}
+    void setPrintResolution( int dpi );
 
     bool printAsRaster() const {return mPrintAsRaster;}
     void setPrintAsRaster( bool enabled ) { mPrintAsRaster = enabled; }
@@ -570,6 +570,9 @@ class CORE_EXPORT QgsComposition : public QGraphicsScene
     void paperSizeChanged();
     void nPagesChanged();
 
+    /**Is emitted when the compositions print resolution changes*/
+    void printResolutionChanged();
+
     /**Is emitted when selected item changed. If 0, no item is selected*/
     void selectedItemChanged( QgsComposerItem* selected );
     /**Is emitted when new composer arrow has been added to the view*/