fixed ticket 90 (post grass edit right click crash)

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5676 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/gui/qgsmapcanvas.cpp

@@ -823,6 +823,20 @@ void QgsMapCanvas::setMapTool(QgsMapTool* tool)
 
 } // setMapTool
 
+void QgsMapCanvas::unsetMapTool(QgsMapTool* tool)
+{
+  if (mMapTool && mMapTool == tool)
+  {
+    mMapTool->deactivate();
+    mMapTool = NULL;
+  }
+
+  if ( mLastNonZoomMapTool && mLastNonZoomMapTool == tool)
+  {
+    mLastNonZoomMapTool->deactivate(); // ? necessary
+    mLastNonZoomMapTool = NULL;
+  }
+} 
 
 /** Write property of QColor bgColor. */
 void QgsMapCanvas::setCanvasColor(const QColor & theColor)

src/gui/qgsmapcanvas.h

@@ -114,6 +114,13 @@ class QgsMapCanvas : public Q3CanvasView
 
     /** \brief Sets the map tool currently being used on the canvas */
     void setMapTool(QgsMapTool* mapTool);
+
+    /** \brief Unset the current mapset tool or last non zoom tool if 
+     *         it the same as passed map tool pointer. The tool is not 
+     *         referenced/used any more, but the instance is not deleted 
+     *         by this method.
+     */
+    void unsetMapTool(QgsMapTool* mapTool);
 
     /**Returns the currently active tool*/
     QgsMapTool* mapTool();

src/plugins/grass/qgsgrassedit.cpp

@@ -106,7 +106,7 @@ bool QgsGrassEdit::mRunning = false;
 
 QgsGrassEdit::QgsGrassEdit ( QgisApp *qgisApp, QgisIface *iface, 
     QWidget * parent, Qt::WFlags f )
-    :QMainWindow(parent,f), QgsGrassEditBase ()
+    :QMainWindow(parent,f), QgsGrassEditBase (), mMapTool(0)
 {
 #ifdef QGISDEBUG
   std::cerr << "QgsGrassEdit()" << std::endl;
@@ -193,7 +193,7 @@ void QgsGrassEdit::keyPress(QKeyEvent *e)
 QgsGrassEdit::QgsGrassEdit ( QgisApp *qgisApp, QgisIface *iface, 
     QgsGrassProvider *provider,
     QWidget * parent, Qt::WFlags f )
-    :QMainWindow(parent, 0, f), QgsGrassEditBase ()
+    :QMainWindow(parent, 0, f), QgsGrassEditBase (), mMapTool(0)
 {
 #ifdef QGISDEBUG
   std::cerr << "QgsGrassEdit()" << std::endl;
@@ -927,6 +927,10 @@ QgsGrassEdit::~QgsGrassEdit()
     delete mRubberBandLine;
     delete mRubberBandIcon;
     delete mCanvasEdit;
+
+    if ( mMapTool ) mCanvas->unsetMapTool ( mMapTool );
+    // TODO: delete tool? Probably
+
     mCanvas->refresh();
   }
 
@@ -1235,7 +1239,10 @@ void QgsGrassEdit::startTool(int tool)
     displayElement ( mSelectedLine, mSymb[mLineSymb[mSelectedLine]], mSize );
 
   // close old tool by setting NULL tool
-  mCanvas->setMapTool(NULL);
+  // TODO: delete old tool? (check in set/unsetMapTool canvas methods)
+  if ( mMapTool ) mCanvas->unsetMapTool ( mMapTool );
+  mCanvas->setMapTool(NULL); // ? necessary
+  mMapTool = NULL;
 
   // All necessary data were written -> reset mEditPoints etc.
   Vect_reset_line ( mEditPoints );
@@ -1321,7 +1328,7 @@ void QgsGrassEdit::startTool(int tool)
   // assign newly created tool to map canvas
   // canvas will take care of destroying it
   mCanvas->setMapTool(t);
-
+  mMapTool = t;
 }
 
 

src/plugins/grass/qgsgrassedit.h

@@ -38,6 +38,7 @@ class QCloseEvent;
 class QgsRubberBand;
 class QgsVertexMarker;
 class QgsVectorLayer;
+class QgsMapTool;
 class QgsGrassEditLayer;
 class QgsGrassAttributes;
 
@@ -437,6 +438,9 @@ public slots:
     QAction *mEditAttributesAction;
     QAction *mCloseEditAction;
 
+    // Current map tool
+    QgsMapTool	*mMapTool;
+
     // Is projection enabled?
     bool mProjectionEnabled;