[Fix] Don't recreate vertex editor each time

Author: NathanW2

src/app/vertextool/qgsvertexeditor.cpp

@@ -277,18 +277,12 @@ QgsVertexEditor::QgsVertexEditor(
   QgsVectorLayer *layer,
   QgsSelectedFeature *selectedFeature,
   QgsMapCanvas *canvas )
-  : mUpdatingTableSelection( false )
+  : mCanvas( canvas )
+  , mUpdatingTableSelection( false )
   , mUpdatingVertexSelection( false )
 {
   setWindowTitle( tr( "Vertex Editor" ) );
-
-  mLayer = layer;
-  mSelectedFeature = selectedFeature;
-  mCanvas = canvas;
-
   mTableView = new QTableView( this );
-  mVertexModel = new QgsVertexEditorModel( mLayer, mSelectedFeature, mCanvas, this );
-  mTableView->setModel( mVertexModel );
 
   mTableView->setSelectionMode( QTableWidget::ExtendedSelection );
   mTableView->setSelectionBehavior( QTableWidget::SelectRows );
@@ -300,8 +294,26 @@ QgsVertexEditor::QgsVertexEditor(
 
   setWidget( mTableView );
 
-  connect( mSelectedFeature, &QgsSelectedFeature::selectionChanged, this, &QgsVertexEditor::updateTableSelection );
   connect( mTableView->selectionModel(), &QItemSelectionModel::selectionChanged, this, &QgsVertexEditor::updateVertexSelection );
+
+  updateEditor( layer, selectedFeature );
+}
+
+void QgsVertexEditor::updateEditor( QgsVectorLayer *layer, QgsSelectedFeature *selectedFeature )
+{
+  if ( mVertexModel )
+  {
+    delete mVertexModel;
+  }
+
+  mLayer = layer;
+  mSelectedFeature = selectedFeature;
+
+  // TOOD We really should just update the model itself.
+  mVertexModel = new QgsVertexEditorModel( mLayer, mSelectedFeature, mCanvas, this );
+  mTableView->setModel( mVertexModel );
+
+  connect( mSelectedFeature, &QgsSelectedFeature::selectionChanged, this, &QgsVertexEditor::updateTableSelection );
 }
 
 void QgsVertexEditor::updateTableSelection()

src/app/vertextool/qgsvertexeditor.h

@@ -75,6 +75,7 @@ class QgsVertexEditor : public QgsDockWidget
                      QgsMapCanvas *canvas );
 
   public:
+    void updateEditor( QgsVectorLayer *layer, QgsSelectedFeature *selectedFeature );
     QgsVectorLayer *mLayer = nullptr;
     QgsSelectedFeature *mSelectedFeature = nullptr;
     QgsMapCanvas *mCanvas = nullptr;

src/app/vertextool/qgsvertextool.cpp

@@ -1036,10 +1036,18 @@ void QgsVertexTool::showVertexEditor()  //#spellok
     return;
 
   mSelectedFeature.reset( new QgsSelectedFeature( m.featureId(), m.layer(), mCanvas ) );
-  mVertexEditor.reset( new QgsVertexEditor( m.layer(), mSelectedFeature.get(), mCanvas ) );
-  QgisApp::instance()->addDockWidget( Qt::LeftDockWidgetArea, mVertexEditor.get() );
-  connect( mVertexEditor.get(), &QgsVertexEditor::deleteSelectedRequested, this, &QgsVertexTool::deleteVertexEditorSelection );
-  connect( mVertexEditor.get(), &QgsVertexEditor::editorClosed, this, &QgsVertexTool::cleanupVertexEditor );
+  if ( !mVertexEditor )
+  {
+    mVertexEditor.reset( new QgsVertexEditor( m.layer(), mSelectedFeature.get(), mCanvas ) );
+    QgisApp::instance()->addDockWidget( Qt::LeftDockWidgetArea, mVertexEditor.get() );
+    connect( mVertexEditor.get(), &QgsVertexEditor::deleteSelectedRequested, this, &QgsVertexTool::deleteVertexEditorSelection );
+    connect( mVertexEditor.get(), &QgsVertexEditor::editorClosed, this, &QgsVertexTool::cleanupVertexEditor );
+  }
+  else
+  {
+    mVertexEditor->updateEditor( m.layer(), mSelectedFeature.get() );
+  }
+
   connect( mSelectedFeature.get()->vlayer(), &QgsVectorLayer::featureDeleted, this, &QgsVertexTool::cleanEditor );
 }