vcl/inc/qt5/QtPainter.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #pragma once
  21
  22 #include <QtCore/QRectF>
  23 #include <QtGui/QPainter>
  24 #include <QtWidgets/QWidget>
  25
  26 #include "QtFrame.hxx"
  27 #include "QtGraphics.hxx"
  28
  29 class QtPainter final : public QPainter
  30 {
  31     QtGraphicsBackend& m_rGraphics;
  32     QRegion m_aRegion;
  33
  34 public:
  35     QtPainter(QtGraphicsBackend& rGraphics, bool bPrepareBrush = false,
  36               sal_uInt8 nTransparency = 255);
  37     ~QtPainter()
  38     {
  39         if (m_rGraphics.m_pFrame && !m_aRegion.isEmpty())
  40             m_rGraphics.m_pFrame->GetQWidget()->update(m_aRegion);
  41     }
  42
  43     void update(int nx, int ny, int nw, int nh)
  44     {
  45         if (m_rGraphics.m_pFrame)
  46             m_aRegion += scaledQRect({ nx, ny, nw, nh }, 1 / m_rGraphics.devicePixelRatioF());
  47     }
  48
  49     void update(const QRect& rRect)
  50     {
  51         if (m_rGraphics.m_pFrame)
  52             m_aRegion += scaledQRect(rRect, 1 / m_rGraphics.devicePixelRatioF());
  53     }
  54
  55     void update(const QRectF& rRectF)
  56     {
  57         if (m_rGraphics.m_pFrame)
  58             update(scaledQRect(rRectF.toAlignedRect(), 1 / m_rGraphics.devicePixelRatioF()));
  59     }
  60
  61     void update()
  62     {
  63         if (m_rGraphics.m_pFrame)
  64             m_aRegion += m_rGraphics.m_pFrame->GetQWidget()->rect();
  65     }
  66 };
  67
  68 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */