Added QgsMapCanvas::layers() method

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@12935 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

python/gui/qgsmapcanvas.sip

@@ -128,6 +128,9 @@ class QgsMapCanvas : QGraphicsView
     //! return number of layers on the map
     int layerCount() const;
 
+    //! return list of layers within map canvas. Added in v1.5
+    QList<QgsMapLayer*> layers() const;
+
     /*! Freeze/thaw the map canvas. This is used to prevent the canvas from
      * responding to events while layers are being added/removed etc.
      * @param frz Boolean specifying if the canvas should be frozen (true) or

src/gui/qgsmapcanvas.cpp

@@ -1164,6 +1164,18 @@ int QgsMapCanvas::layerCount() const
 } // layerCount
 
 
+QList<QgsMapLayer*> QgsMapCanvas::layers() const
+{
+  QList<QgsMapLayer*> lst;
+  foreach ( QString layerID, mMapRenderer->layerSet() )
+  {
+    QgsMapLayer* layer = QgsMapLayerRegistry::instance()->mapLayer( layerID );
+    if ( layer )
+      lst.append(layer);
+  }
+  return lst;
+}
+
 
 void QgsMapCanvas::layerStateChange()
 {

src/gui/qgsmapcanvas.h

@@ -185,6 +185,9 @@ class GUI_EXPORT QgsMapCanvas : public QGraphicsView
     //! return number of layers on the map
     int layerCount() const;
 
+    //! return list of layers within map canvas. Added in v1.5
+    QList<QgsMapLayer*> layers() const;
+
     /*! Freeze/thaw the map canvas. This is used to prevent the canvas from
      * responding to events while layers are being added/removed etc.
      * @param frz Boolean specifying if the canvas should be frozen (true) or