[composer] Add a featureChanged signal for when the current atlas fea…

…ture changes (sponsored by City of Uster, Switzerland)
qgis · Apr 28, 2014 · ca186c7 · ca186c7
1 parent 85c2e14
commit ca186c7
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diff --git a/python/core/composer/qgsatlascomposition.sip b/python/core/composer/qgsatlascomposition.sip
@@ -187,4 +187,8 @@ public:
 
     /**Is emitted when atlas rendering has ended*/
     void renderEnded();
+
+    /**Is emitted when the current atlas feature changes*/
+    void featureChanged( QgsFeature* feature );
+
 };
diff --git a/src/core/composer/qgsatlascomposition.cpp b/src/core/composer/qgsatlascomposition.cpp
@@ -411,6 +411,10 @@ void QgsAtlasComposition::prepareForFeature( int featureI )
   // generate filename for current feature
   evalFeatureFilename();
 
+  emit featureChanged( &mCurrentFeature );
+
+  // TODO - move these updates to label/shape/page item
+
   // evaluate label expressions
   QList<QgsComposerLabel*> labels;
   mComposition->composerItems( labels );

diff --git a/src/core/composer/qgsatlascomposition.h b/src/core/composer/qgsatlascomposition.h
@@ -217,6 +217,9 @@ class CORE_EXPORT QgsAtlasComposition : public QObject
     /**Is emitted when atlas rendering has ended*/
     void renderEnded();
 
+    /**Is emitted when the current atlas feature changes*/
+    void featureChanged( QgsFeature* feature );
+
   private:
     /**Updates the filename expression*/
     void updateFilenameExpression();