vcl/source/control/imgctrl.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
  21 #include <vcl/event.hxx>
  22 #include <vcl/imgctrl.hxx>
  23 #include <tools/rcid.h>
  24
  25 #include <com/sun/star/awt/ImageScaleMode.hpp>
  26
  27 namespace ImageScaleMode = ::com::sun::star::awt::ImageScaleMode;
  28
  29 // -----------------------------------------------------------------------
  30
  31 ImageControl::ImageControl( Window* pParent, WinBits nStyle )
  32     :FixedImage( pParent, nStyle )
  33     ,mnScaleMode( ImageScaleMode::Anisotropic )
  34 {
  35 }
  36
  37 // -----------------------------------------------------------------------
  38
  39 ImageControl::ImageControl( Window* pParent, const ResId& rResId )
  40     :FixedImage( pParent, rResId )
  41     ,mnScaleMode( ImageScaleMode::Anisotropic )
  42 {
  43 }
  44
  45 // -----------------------------------------------------------------------
  46
  47 void ImageControl::SetScaleMode( const ::sal_Int16 _nMode )
  48 {
  49     if ( _nMode != mnScaleMode )
  50     {
  51         mnScaleMode = _nMode;
  52         Invalidate();
  53     }
  54 }
  55
  56 // -----------------------------------------------------------------------
  57
  58 void ImageControl::Resize()
  59 {
  60     Invalidate();
  61 }
  62
  63 // -----------------------------------------------------------------------
  64 namespace
  65 {
  66     static Size lcl_calcPaintSize( const Rectangle& _rPaintRect, const Size& _rBitmapSize )
  67     {
  68         const Size aPaintSize = _rPaintRect.GetSize();
  69
  70         const double nRatioX = 1.0 * aPaintSize.Width() / _rBitmapSize.Width();
  71         const double nRatioY = 1.0 * aPaintSize.Height() / _rBitmapSize.Height();
  72         const double nRatioMin = ::std::min( nRatioX, nRatioY );
  73
  74         return Size( long( _rBitmapSize.Width() * nRatioMin ), long( _rBitmapSize.Height() * nRatioMin ) );
  75     }
  76
  77     static Point lcl_centerWithin( const Rectangle& _rArea, const Size& _rObjectSize )
  78     {
  79         Point aPos( _rArea.TopLeft() );
  80         aPos.X() += ( _rArea.GetWidth() - _rObjectSize.Width() ) / 2;
  81         aPos.Y() += ( _rArea.GetHeight() - _rObjectSize.Height() ) / 2;
  82         return aPos;
  83     }
  84 }
  85
  86 // -----------------------------------------------------------------------
  87
  88 void ImageControl::ImplDraw( OutputDevice& rDev, sal_uLong nDrawFlags, const Point& rPos, const Size& rSize ) const
  89 {
  90     sal_uInt16 nStyle = 0;
  91     if ( !(nDrawFlags & WINDOW_DRAW_NODISABLE) )
  92     {
  93         if ( !IsEnabled() )
  94             nStyle |= IMAGE_DRAW_DISABLE;
  95     }
  96
  97     const Image& rImage( GetModeImage() );
  98     const Image* pImage = &rImage;
  99     const Rectangle aDrawRect( rPos, rSize );
 100     if ( !*pImage )
 101     {
 102         String  sText( GetText() );
 103         if ( !sText.Len() )
 104             return;
 105
 106         WinBits nWinStyle = GetStyle();
 107         sal_uInt16 nTextStyle = FixedText::ImplGetTextStyle( nWinStyle );
 108         if ( !(nDrawFlags & WINDOW_DRAW_NODISABLE) )
 109             if ( !IsEnabled() )
 110                 nTextStyle |= TEXT_DRAW_DISABLE;
 111
 112         rDev.DrawText( aDrawRect, sText, nTextStyle );
 113         return;
 114     }
 115
 116     const Size&      rBitmapSize = pImage->GetSizePixel();
 117
 118     switch ( mnScaleMode )
 119     {
 120     case ImageScaleMode::None:
 121     {
 122         rDev.DrawImage( lcl_centerWithin( aDrawRect, rBitmapSize ), *pImage, nStyle );
 123     }
 124     break;
 125
 126     case ImageScaleMode::Isotropic:
 127     {
 128         const Size aPaintSize = lcl_calcPaintSize( aDrawRect, rBitmapSize );
 129         rDev.DrawImage(
 130             lcl_centerWithin( aDrawRect, aPaintSize ),
 131             aPaintSize,
 132             *pImage, nStyle );
 133     }
 134     break;
 135
 136     case ImageScaleMode::Anisotropic:
 137     {
 138         rDev.DrawImage(
 139             aDrawRect.TopLeft(),
 140             aDrawRect.GetSize(),
 141             *pImage, nStyle );
 142     }
 143     break;
 144
 145     default:
 146         OSL_ENSURE( false, "ImageControl::ImplDraw: unhandled scale mode!" );
 147         break;
 148
 149     }   // switch ( mnScaleMode )
 150 }
 151
 152 // -----------------------------------------------------------------------
 153
 154 void ImageControl::Paint( const Rectangle& /*rRect*/ )
 155 {
 156     ImplDraw( *this, 0, Point(), GetOutputSizePixel() );
 157
 158     if( HasFocus() )
 159     {
 160         Window *pWin = GetWindow( WINDOW_BORDER );
 161
 162         bool bFlat = (GetBorderStyle() == 2);
 163         Rectangle aRect( Point(0,0), pWin->GetOutputSizePixel() );
 164         Color oldLineCol = pWin->GetLineColor();
 165         Color oldFillCol = pWin->GetFillColor();
 166         pWin->SetFillColor();
 167         pWin->SetLineColor( bFlat ? COL_WHITE : COL_BLACK );
 168         pWin->DrawRect( aRect );
 169         ++aRect.Left();
 170         --aRect.Right();
 171         ++aRect.Top();
 172         --aRect.Bottom();
 173         pWin->SetLineColor( bFlat ? COL_BLACK : COL_WHITE );
 174         pWin->DrawRect( aRect );
 175         pWin->SetLineColor( oldLineCol );
 176         pWin->SetFillColor( oldFillCol );
 177     }
 178 }
 179
 180 // -----------------------------------------------------------------------
 181 void ImageControl::Draw( OutputDevice* pDev, const Point& rPos, const Size& rSize, sal_uLong nFlags )
 182 {
 183     const Point     aPos  = pDev->LogicToPixel( rPos );
 184     const Size      aSize = pDev->LogicToPixel( rSize );
 185           Rectangle aRect( aPos, aSize );
 186
 187     pDev->Push();
 188     pDev->SetMapMode();
 189
 190     // Border
 191     if ( !(nFlags & WINDOW_DRAW_NOBORDER) && (GetStyle() & WB_BORDER) )
 192     {
 193         ImplDrawFrame( pDev, aRect );
 194     }
 195     pDev->IntersectClipRegion( aRect );
 196     ImplDraw( *pDev, nFlags, aRect.TopLeft(), aRect.GetSize() );
 197
 198     pDev->Pop();
 199 }
 200
 201 // -----------------------------------------------------------------------
 202
 203 void ImageControl::GetFocus()
 204 {
 205     FixedImage::GetFocus();
 206     GetWindow( WINDOW_BORDER )->Invalidate();
 207 }
 208
 209 // -----------------------------------------------------------------------
 210
 211 void ImageControl::LoseFocus()
 212 {
 213     FixedImage::GetFocus();
 214     GetWindow( WINDOW_BORDER )->Invalidate();
 215 }
 216
 217 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */