disconnect signals, check mValid in postRender, set newpoint on startup

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@4921 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: rblazek

src/plugins/grass/qgsgrassedit.cpp

@@ -454,6 +454,7 @@ void QgsGrassEdit::init()
   // TODO: how to get keyboard events from canvas (shortcuts)
 
   mNewPointAction->setOn(true); // Start NEW_POINT tool
+  startTool(QgsGrassEdit::NEW_POINT);
 
   restorePosition();
 
@@ -842,6 +843,15 @@ void QgsGrassEdit::closeEdit(void)
   std::cerr << "QgsGrassEdit::close()" << std::endl;
 #endif
 
+  // Disconnect signals
+  // Warning: it seems that slots (postRender) can be called even 
+  //          after disconnect (is it a queue?) 
+  disconnect( this, SLOT(mouseEventReceiverClick(QgsPoint &, Qt::ButtonState)));
+  disconnect( this, SLOT(mouseEventReceiverMove(QgsPoint &)));
+  disconnect( this, SLOT(postRender(QPainter *)));
+
+  mValid = false; // important for postRender
+
   if ( mAttributes ) {
     delete mAttributes;
   }
@@ -1908,6 +1918,12 @@ void QgsGrassEdit::postRender(QPainter *painter)
   std::cerr << "QgsGrassEdit::postRender" << std::endl;
 #endif
 
+  // Warning: it seems that this slot can be called even 
+  //          after disconnect (is it a queue?) 
+  //          -> check mValid
+
+  if ( !mValid ) return;
+
   displayMap(painter);
 
   // Redisplay highlighted