sw/source/uibase/uiview/scroll.cxx

   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
  20 #include <scroll.hxx>
  21
  22 #define SCROLL_LINE_SIZE 250
  23
  24 SwScrollbar::SwScrollbar(vcl::Window *pWin, bool bHoriz)
  25     : ScrollAdaptor(pWin, bHoriz)
  26     , m_bAuto(false)
  27     , m_bVisible(false)
  28     , m_bSizeSet(false)
  29 {
  30     m_xScrollBar->show();
  31
  32     // No mirroring for horizontal scrollbars
  33     if (bHoriz)
  34         m_xScrollBar->set_direction(false);
  35 }
  36
  37 // Will be called after a change of the document size
  38 // to refresh the range of the scrollbars.
  39 void SwScrollbar::DocSzChgd( const Size &rSize )
  40 {
  41     m_aDocSz = rSize;
  42     SetRange( Range( 0, m_bHori ? rSize.Width() : rSize.Height()) );
  43     const tools::Long nVisSize = GetVisibleSize();
  44     SetLineSize( SCROLL_LINE_SIZE );
  45     SetPageSize( nVisSize * 77 / 100 );
  46 }
  47
  48 // Will be called after a change of the visible view section.
  49 void SwScrollbar::ViewPortChgd( const tools::Rectangle &rRect )
  50 {
  51     tools::Long nThumb, nVisible;
  52     if( m_bHori )
  53     {
  54         nThumb = rRect.Left();
  55         nVisible = rRect.GetWidth();
  56     }
  57     else
  58     {
  59         nThumb = rRect.Top();
  60         nVisible = rRect.GetHeight();
  61     }
  62
  63     SetVisibleSize( nVisible );
  64     DocSzChgd(m_aDocSz);
  65     SetThumbPos( nThumb );
  66     if(m_bAuto)
  67         AutoShow();
  68 }
  69
  70 void SwScrollbar::ExtendedShow( bool bSet )
  71 {
  72     m_bVisible = bSet;
  73     if( (!bSet ||  !m_bAuto) && IsUpdateMode() && m_bSizeSet)
  74     {
  75         ScrollAdaptor::Show(bSet);
  76     }
  77 }
  78
  79 void SwScrollbar::SetPosSizePixel( const Point& rNewPos, const Size& rNewSize )
  80 {
  81     ScrollAdaptor::SetPosSizePixel(rNewPos, rNewSize);
  82     m_bSizeSet = true;
  83     if(m_bVisible)
  84         ExtendedShow();
  85 }
  86
  87 void SwScrollbar::SetAuto(bool bSet)
  88 {
  89     if(m_bAuto != bSet)
  90     {
  91         m_bAuto = bSet;
  92
  93         // hide automatically - then show
  94         if(!m_bAuto && m_bVisible && !ScrollAdaptor::IsVisible())
  95             ExtendedShow();
  96         else if(m_bAuto)
  97             AutoShow(); // or hide automatically
  98     }
  99 }
 100
 101 void SwScrollbar::AutoShow()
 102 {
 103     tools::Long nVis = GetVisibleSize();
 104     tools::Long nLen = GetRange().Len();
 105     if (nVis >= nLen - 1)
 106     {
 107         if (ScrollAdaptor::IsVisible())
 108             ScrollAdaptor::Show(false);
 109     }
 110     else if (!ScrollAdaptor::IsVisible())
 111     {
 112         ScrollAdaptor::Show();
 113     }
 114 }
 115
 116 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */