QmlDesigner: Avoid visual artefacts

Avoid visual artefacts when changing states.

Change-Id: I00aa1499ff027d060b06699b60ebd2d5162d0e16
Reviewed-by: Henning Gründl <henning.gruendl@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

2 files changed, 14 insertions, 4 deletions

diff --git a/src/plugins/qmldesigner/components/formeditor/formeditorview.cpp b/src/plugins/qmldesigner/components/formeditor/formeditorview.cpp
index 96dda07c51..1a9f165483 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditorview.cpp
+++ b/src/plugins/qmldesigner/components/formeditor/formeditorview.cpp
@@ -234,12 +234,12 @@ void FormEditorView::createFormEditorWidget()
     connect(m_formEditorWidget->resetAction(), &QAction::triggered, this, &FormEditorView::resetNodeInstanceView);
 }
 
-void FormEditorView::temporaryBlockView()
+void FormEditorView::temporaryBlockView(int duration)
 {
     m_formEditorWidget->graphicsView()->setUpdatesEnabled(false);
     static auto timer = new QTimer(qApp);
     timer->setSingleShot(true);
-    timer->start(1000);
+    timer->start(duration);
 
     connect(timer, &QTimer::timeout, this, [this]() {
         m_formEditorWidget->graphicsView()->setUpdatesEnabled(true);
@@ -496,6 +496,11 @@ void FormEditorView::customNotification(const AbstractView * /*view*/, const QSt
         m_formEditorWidget->zoomAction()->zoomOut();
 }
 
+void FormEditorView::currentStateChanged(const ModelNode & /*node*/)
+{
+    temporaryBlockView(100);
+}
+
 AbstractFormEditorTool *FormEditorView::currentTool() const
 {
     return m_currentTool;
diff --git a/src/plugins/qmldesigner/components/formeditor/formeditorview.h b/src/plugins/qmldesigner/components/formeditor/formeditorview.h
index d6a479e847..64c1f2a435 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditorview.h
+++ b/src/plugins/qmldesigner/components/formeditor/formeditorview.h
@@ -84,7 +84,12 @@ public:
 
     void documentMessagesChanged(const QList<DocumentMessage> &errors, const QList<DocumentMessage> &warnings) override;
 
-    void customNotification(const AbstractView *view, const QString &identifier, const QList<ModelNode> &nodeList, const QList<QVariant> &data) override;
+    void customNotification(const AbstractView *view,
+                            const QString &identifier,
+                            const QList<ModelNode> &nodeList,
+                            const QList<QVariant> &data) override;
+
+    void currentStateChanged(const ModelNode &node) override;
 
     // FormEditorView
     WidgetInfo widgetInfo() override;
@@ -134,7 +139,7 @@ private:
     void removeNodeFromScene(const QmlItemNode &qmlItemNode);
     void hideNodeFromScene(const QmlItemNode &qmlItemNode);
     void createFormEditorWidget();
-    void temporaryBlockView();
+    void temporaryBlockView(int duration = 1000);
     void resetNodeInstanceView();
 
     QPointer<FormEditorWidget> m_formEditorWidget;