added currentLayerChanged signal

rblazek · rblazek · commit b25458f0ab06 · 2006-03-29T16:28:40.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk@5111 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/legend/qgslegend.cpp b/src/legend/qgslegend.cpp
@@ -87,14 +87,16 @@ QgsLegend::~QgsLegend()
 
 void QgsLegend::handleCurrentItemChanged(QTreeWidgetItem* current, QTreeWidgetItem* previous)
 {
+  QgsMapLayer *layer = currentLayer();
   if(mApp)
     {
-      mApp->activateDeactivateLayerRelatedActions(currentLayer());
+      mApp->activateDeactivateLayerRelatedActions( layer );
     }
   if(mMapCanvas)
     {
-      mMapCanvas->setCurrentLayer(currentLayer());
+      mMapCanvas->setCurrentLayer( layer );
     }
+  emit currentLayerChanged ( layer );
 }   
 
 void QgsLegend::addGroup()
diff --git a/src/legend/qgslegend.h b/src/legend/qgslegend.h
@@ -327,5 +327,8 @@ this item may be moved back to the original position with resetToInitialPosition
 signals:
   void zOrderChanged(QgsLegend * lv);
 
+  //! Emited whenever current (selected) layer changes
+  //  the pointer to layer can be null if no layer is selected
+  void currentLayerChanged ( QgsMapLayer * layer );
 };
 #endif

Original file line number	Diff line number	Diff line change
`@@ -87,14 +87,16 @@ QgsLegend::~QgsLegend()`
`87`	`87`
`88`	`88`	`void QgsLegend::handleCurrentItemChanged(QTreeWidgetItem* current, QTreeWidgetItem* previous)`
`89`	`89`	`{`
	`90`	`+ QgsMapLayer *layer = currentLayer();`
`90`	`91`	`if(mApp)`
`91`	`92`	`{`
`92`		`- mApp->activateDeactivateLayerRelatedActions(currentLayer());`
	`93`	`+ mApp->activateDeactivateLayerRelatedActions( layer );`
`93`	`94`	`}`
`94`	`95`	`if(mMapCanvas)`
`95`	`96`	`{`
`96`		`- mMapCanvas->setCurrentLayer(currentLayer());`
	`97`	`+ mMapCanvas->setCurrentLayer( layer );`
`97`	`98`	`}`
	`99`	`+ emit currentLayerChanged ( layer );`
`98`	`100`	`}`
`99`	`101`
`100`	`102`	`void QgsLegend::addGroup()`