From 44c02b52a3b12b0ed2485ce38ad824bec9764a97 Mon Sep 17 00:00:00 2001
From: Thomas Hartmann <thomas.hartmann@qt.io>
Date: Mon, 11 Dec 2017 14:48:00 +0100
Subject: [PATCH] QmlDesigner: Enable clipping in FormEditorItem

When resizing an item the instanceIsRenderPixmap can be bigger than
the bounding rect. In this case we get painting artefacts.

Change-Id: I6da43f16a1e85d045a0ebbb01db594979ad89622
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>
---
 .../qmldesigner/components/formeditor/formeditoritem.cpp       | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/plugins/qmldesigner/components/formeditor/formeditoritem.cpp b/src/plugins/qmldesigner/components/formeditor/formeditoritem.cpp
index 1fa95273ff..54d5d1536d 100644
--- a/src/plugins/qmldesigner/components/formeditor/formeditoritem.cpp
+++ b/src/plugins/qmldesigner/components/formeditor/formeditoritem.cpp
@@ -338,6 +338,9 @@ void FormEditorItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *,
     if (isInStackedContainer)
         showPlaceHolder = qmlItemNode().instanceIsRenderPixmapNull() && isContentVisible();
 
+    painter->setClipRegion(m_boundingRect.toRect());
+    painter->setClipping(true);
+
     if (!hideCompletely) {
         if (showPlaceHolder) {
             if (scene()->showBoundingRects() && m_boundingRect.width() > 15 && m_boundingRect.height() > 15)
-- 
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