sw/source/core/inc/ptqueue.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.
   4  *
   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 #ifndef INCLUDED_SW_SOURCE_CORE_INC_PTQUEUE_HXX
  20 #define INCLUDED_SW_SOURCE_CORE_INC_PTQUEUE_HXX
  21
  22 /**
  23  * Unfortunately we have some problems with processing more than one Paint()
  24  * at a time. This happens especially often during printing.
  25  *
  26  * SwRootFrame::PaintSwFrame() determines that it's called a second time and adds the
  27  * rectangle and the corresponding Shell to the PaintCollector.
  28  * The call sites that are causing the double Paint() only need to process the
  29  * collected Paint()s at the right point in time.
  30  * Doing this during printing (after having printed one page) is very suitable
  31  * for doing that.
  32  *
  33  * Invalidating windows directly from the RootFrame::PaintSwFrame was not a successful
  34  * approach, because the Paint()s arrive at a very unfavourable point in time.
  35  * Triggering an update for all windows after printing each page does not seem
  36  * appropriate either: on the one hand we don't have direct access to the edit
  37  * windows and on the other hand the updates can become very costly on some
  38  * platforms.
  39  */
  40
  41 class SwQueuedPaint;
  42 class SwViewShell;
  43 class SwRect;
  44
  45 class SwPaintQueue
  46 {
  47 public:
  48     static SwQueuedPaint* s_pPaintQueue;
  49
  50     static void Add(SwViewShell* pSh, const SwRect& rNew);
  51     static void Remove(SwViewShell const* pSh);
  52     static void Repaint();
  53 };
  54
  55 #endif
  56
  57 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */