1 files changed, 68 insertions, 0 deletions
diff --git a/vcl/inc/qt5/QtPainter.hxx b/vcl/inc/qt5/QtPainter.hxx
new file mode 100644
index 0000000000..9702a19bdb
--- /dev/null
+++ b/vcl/inc/qt5/QtPainter.hxx
@@ -0,0 +1,68 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <QtCore/QRectF>
+#include <QtGui/QPainter>
+#include <QtWidgets/QWidget>
+
+#include "QtFrame.hxx"
+#include "QtGraphics.hxx"
+
+class QtPainter final : public QPainter
+{
+    QtGraphicsBackend& m_rGraphics;
+    QRegion m_aRegion;
+
+public:
+    QtPainter(QtGraphicsBackend& rGraphics, bool bPrepareBrush = false,
+              sal_uInt8 nTransparency = 255);
+    ~QtPainter()
+    {
+        if (m_rGraphics.m_pFrame && !m_aRegion.isEmpty())
+            m_rGraphics.m_pFrame->GetQWidget()->update(m_aRegion);
+    }
+
+    void update(int nx, int ny, int nw, int nh)
+    {
+        if (m_rGraphics.m_pFrame)
+            m_aRegion += scaledQRect({ nx, ny, nw, nh }, 1 / m_rGraphics.devicePixelRatioF());
+    }
+
+    void update(const QRect& rRect)
+    {
+        if (m_rGraphics.m_pFrame)
+            m_aRegion += scaledQRect(rRect, 1 / m_rGraphics.devicePixelRatioF());
+    }
+
+    void update(const QRectF& rRectF)
+    {
+        if (m_rGraphics.m_pFrame)
+            update(scaledQRect(rRectF.toAlignedRect(), 1 / m_rGraphics.devicePixelRatioF()));
+    }
+
+    void update()
+    {
+        if (m_rGraphics.m_pFrame)
+            m_aRegion += m_rGraphics.m_pFrame->GetQWidget()->rect();
+    }
+};
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */