Applied patch for legend refresh from plugins provided by Juergen

git-svn-id: http://svn.osgeo.org/qgis/trunk@7296 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

python/gui/qgisinterface.sip

@@ -81,6 +81,9 @@ class QgisInterface : QObject
     /** Return a pointer to the toolbox (where additional pages can be inserted) */
     virtual QToolBox* getToolBox()=0;
 
+    /** refresh legend of a layer */
+    virtual void refreshLegend( QgsMapLayer * layer )=0;
+
   signals:
     /** Emited whenever current (selected) layer changes.
      *  The pointer to layer can be null if no layer is selected

src/app/qgisappinterface.cpp

@@ -140,3 +140,11 @@ QToolBox* QgisAppInterface::getToolBox()
 {
   return qgis->toolBox;
 }
+
+void QgisAppInterface::refreshLegend(QgsMapLayer *l)
+{
+  if(l && qgis && qgis->legend())
+    {
+      qgis->legend()->refreshLayerSymbology( l->getLayerID() );
+    }
+}

src/app/qgisappinterface.h

@@ -104,6 +104,8 @@ class QgisAppInterface : public QgisInterface
         /** Return a pointer to the toolbox (where additional pages can be inserted) */
         virtual QToolBox* getToolBox();
 
+	virtual void refreshLegend(QgsMapLayer *l);
+
     private:
 
         /// QgisInterface aren't copied

src/gui/qgisinterface.h

@@ -113,6 +113,9 @@ class GUI_EXPORT QgisInterface : public QObject
     /** Return a pointer to the toolbox (where additional pages can be inserted) */
     virtual QToolBox* getToolBox()=0;
 
+    /** refresh the legend of a layer */
+    virtual void refreshLegend(QgsMapLayer *l)=0;
+
   signals:
     /** Emited whenever current (selected) layer changes.
      *  The pointer to layer can be null if no layer is selected