Fix for crash - ticket #756

git-svn-id: http://svn.osgeo.org/qgis/trunk@8057 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

src/plugins/grass/qgsgrassedit.cpp

@@ -112,7 +112,7 @@ class QgsGrassEditLayer : public QgsMapCanvasItem
 
 bool QgsGrassEdit::mRunning = false;
 
-QgsGrassEdit::QgsGrassEdit ( QgisInterface *iface, 
+QgsGrassEdit::QgsGrassEdit ( QgisInterface *iface, QgsMapLayer* layer, bool newMap,
     QWidget * parent, Qt::WFlags f )
     :QMainWindow(parent,f), QgsGrassEditBase (), mInited(false), 
      mMapTool(0), mCanvasEdit(0), mRubberBandLine(0), mRubberBandIcon(0)
@@ -128,17 +128,12 @@ QgsGrassEdit::QgsGrassEdit ( QgisInterface *iface,
   mTool = QgsGrassEdit::NONE;
   mSuspend = false;
   mIface = iface;
-  mNewMap = false;
+  mNewMap = newMap;
 
   mProjectionEnabled = (QgsProject::instance()->readNumEntry("SpatialRefSys","/ProjectionsEnabled",0)!=0);
 
   mCanvas = mIface->getMapCanvas();
 
-  // TODO QGIS: crash if canvas is empty
-
-  // At moment QgisIface::activeLayer() does not work
-  QgsMapLayer *layer = (QgsMapLayer *) mIface->activeLayer();
-
   if ( !isEditable(layer) ) return;
 
   //TODO dynamic_cast ?
@@ -198,33 +193,6 @@ void QgsGrassEdit::keyPress(QKeyEvent *e)
     }
 }
 
-QgsGrassEdit::QgsGrassEdit ( QgisInterface *iface, 
-    QgsGrassProvider *provider,
-    QWidget * parent, Qt::WFlags f )
-    :QMainWindow(parent, 0, f), QgsGrassEditBase (), mInited(false), 
-     mMapTool(0), mCanvasEdit(0), mRubberBandLine(0), mRubberBandIcon(0)
-{
-#ifdef QGISDEBUG
-  std::cerr << "QgsGrassEdit()" << std::endl;
-#endif
-
-  setupUi(this);
-
-  mRunning = true;
-  mValid = false;
-  mTool = QgsGrassEdit::NONE;
-  mSuspend = false;
-  mIface = iface;
-  mNewMap = true;
-
-  mProjectionEnabled = (QgsProject::instance()->readNumEntry("SpatialRefSys","/ProjectionsEnabled",0)!=0);
-
-  mCanvas = mIface->getMapCanvas();
-
-  mProvider = provider;
-
-  init();
-}
 
 void QgsGrassEdit::init()
 {

src/plugins/grass/qgsgrassedit.h

@@ -116,10 +116,7 @@ class QgsGrassEdit: public QMainWindow, private Ui::QgsGrassEditBase
 
     //! Constructor
     QgsGrassEdit ( QgisInterface *iface, 
-	           QWidget * parent = 0, Qt::WFlags f = 0 );
-
-    QgsGrassEdit ( QgisInterface *iface, 
-                   QgsGrassProvider *provider,
+                   QgsMapLayer *layer, bool newMap,
 	           QWidget * parent = 0, Qt::WFlags f = 0 );
 
     // Shared by constructors

src/plugins/grass/qgsgrassplugin.cpp

@@ -440,7 +440,8 @@ void QgsGrassPlugin::edit()
   }
 
   mEditAction->setEnabled(false);
-  QgsGrassEdit *ed = new QgsGrassEdit( qGisInterface, qGisInterface->getMainWindow(), Qt::WType_Dialog );
+  QgsGrassEdit *ed = new QgsGrassEdit( qGisInterface, qGisInterface->activeLayer(), false,
+                                       qGisInterface->getMainWindow(), Qt::WType_Dialog );
 
   if ( ed->isValid() ) {
     ed->show();
@@ -511,24 +512,22 @@ void QgsGrassPlugin::newVector()
     Vect_close ( &Map );
 
     // Open in GRASS vector provider
-    QgsProviderRegistry *pr = QgsProviderRegistry::instance();
 
     QString uri = QgsGrass::getDefaultGisdbase() + "/" 
                  + QgsGrass::getDefaultLocation() + "/" 
                  + QgsGrass::getDefaultMapset() + "/" 
                  + name + "/0_point";
-
-    QgsGrassProvider *provider = (QgsGrassProvider *) 
-                       pr->getProvider ( "grass", uri );
-
-    if ( !provider ) 
+    
+    QgsVectorLayer* layer = new QgsVectorLayer(uri, name, "grass");
+    
+    if ( !layer ) 
     {
         QMessageBox::warning( 0, tr("Warning"), tr("New vector created "
                   "but cannot be opened by data provider.") );
         return;
     }
 
-    QgsGrassEdit *ed = new QgsGrassEdit(qGisInterface, provider, 
+    QgsGrassEdit *ed = new QgsGrassEdit(qGisInterface, layer, true,
                qGisInterface->getMainWindow(), Qt::WType_Dialog );
 
     if ( ed->isValid() ) {