Better synchronisation between node editor and node tool

Author: mhugent

src/app/nodetool/qgsmaptoolnodetool.cpp

@@ -90,6 +90,7 @@ void QgsMapToolNodeTool::canvasMapPressEvent( QgsMapMouseEvent* e )
     mSelectedFeature = new QgsSelectedFeature( snapResults[0].snappedAtGeometry, vlayer, mCanvas );
     connect( QgisApp::instance()->layerTreeView(), SIGNAL( currentLayerChanged( QgsMapLayer* ) ), this, SLOT( currentLayerChanged( QgsMapLayer* ) ) );
     connect( mSelectedFeature, SIGNAL( destroyed() ), this, SLOT( selectedFeatureDestroyed() ) );
+    connect( mSelectedFeature, SIGNAL( lastVertexChanged( const QgsPointV2& ) ), this, SLOT( changeLastVertex( const QgsPointV2& ) ) );
     connect( vlayer, SIGNAL( editingStopped() ), this, SLOT( editingToggled() ) );
     mIsPoint = vlayer->geometryType() == QGis::Point;
     mNodeEditor = new QgsNodeEditor( vlayer, mSelectedFeature, mCanvas );
@@ -113,7 +114,7 @@ void QgsMapToolNodeTool::canvasMapPressEvent( QgsMapMouseEvent* e )
 
       QgsPoint closestLayerVertex = mSelectedFeature->geometry()->closestVertex( e->mapPoint(), atVertex, beforeVertex, afterVertex, dist );
       mSelectedFeature->selectVertex( atVertex );
-      mClosestMapVertex = toMapCoordinates( vlayer, closestLayerVertex );
+      //mClosestMapVertex = toMapCoordinates( vlayer, closestLayerVertex );
     }
   }
 }
@@ -309,3 +310,8 @@ int QgsMapToolNodeTool::insertSegmentVerticesForSnap( const QList<QgsSnappingRes
 
   return editedLayer->insertSegmentVerticesForSnap( transformedSnapResults );
 }
+
+void QgsMapToolNodeTool::changeLastVertex( const QgsPointV2& pt )
+{
+  mClosestMapVertex = toMapCoordinates( currentVectorLayer(), QgsPoint( pt.x(), pt.y() ) );
+}

src/app/nodetool/qgsmaptoolnodetool.h

@@ -57,6 +57,8 @@ class QgsMapToolNodeTool: public QgsMapToolEdit
      */
     void editingToggled();
 
+    void changeLastVertex( const QgsPointV2& pt );
+
   private:
     /**
      * Deletes the rubber band pointers and clears mRubberBands

src/app/nodetool/qgsnodeeditor.cpp

@@ -225,12 +225,14 @@ void QgsNodeEditor::updateTableSelection()
 
 void QgsNodeEditor::updateNodeSelection()
 {
-  mSelectedFeature->blockSignals( true );
+  disconnect( mSelectedFeature, SIGNAL( selectionChanged() ), this, SLOT( updateTableSelection() ) );
+
   mSelectedFeature->deselectAllVertexes();
   foreach ( const QModelIndex& index, mTableWidget->selectionModel()->selectedRows() )
   {
     int nodeIdx = mTableWidget->item( index.row(), 0 )->data( Qt::DisplayRole ).toInt();
     mSelectedFeature->selectVertex( nodeIdx );
   }
-  mSelectedFeature->blockSignals( false );
+
+  connect( mSelectedFeature, SIGNAL( selectionChanged() ), this, SLOT( updateTableSelection() ) );
 }

src/app/nodetool/qgsselectedfeature.cpp

@@ -433,6 +433,7 @@ void QgsSelectedFeature::selectVertex( int vertexNr )
   entry->setSelected();
 
   emit selectionChanged();
+  emit lastVertexChanged( entry->point() );
 }
 
 void QgsSelectedFeature::deselectVertex( int vertexNr )
@@ -442,8 +443,23 @@ void QgsSelectedFeature::deselectVertex( int vertexNr )
 
   QgsVertexEntry *entry = mVertexMap[vertexNr];
   entry->setSelected( false );
-
   emit selectionChanged();
+
+  //todo: take another selected vertex as 'lastVertexChanged'
+  QList<QgsVertexEntry*>::const_iterator vIt = mVertexMap.constBegin();
+  for ( ; vIt != mVertexMap.constEnd(); ++vIt )
+  {
+    if (( *vIt )->isSelected() )
+    {
+      emit lastVertexChanged(( *vIt )->point() );
+      return;
+    }
+  }
+
+  if ( vIt == mVertexMap.constEnd() )
+  {
+    emit lastVertexChanged( QgsPointV2() ); //no selection anymore
+  }
 }
 
 void QgsSelectedFeature::deselectAllVertexes()
@@ -453,6 +469,7 @@ void QgsSelectedFeature::deselectAllVertexes()
     mVertexMap[i]->setSelected( false );
   }
   emit selectionChanged();
+  emit lastVertexChanged( QgsPointV2() );
 }
 
 void QgsSelectedFeature::invertVertexSelection( int vertexNr )
@@ -466,6 +483,10 @@ void QgsSelectedFeature::invertVertexSelection( int vertexNr )
 
   entry->setSelected( selected );
   emit selectionChanged();
+  if ( selected )
+  {
+    emit lastVertexChanged( entry->point() );
+  }
 }
 
 void QgsSelectedFeature::updateVertexMarkersPosition()

src/app/nodetool/qgsselectedfeature.h

@@ -133,6 +133,7 @@ class QgsSelectedFeature: public QObject
 
   signals:
     void selectionChanged();
+    void lastVertexChanged( const QgsPointV2& pt );
     void vertexMapChanged();
 
   public slots: