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 #include <vcl/toolkit/imgctrl.hxx>
  21
  22 #include <com/sun/star/awt/ImageScaleMode.hpp>
  23 #include <osl/diagnose.h>
  24
  25 namespace ImageScaleMode = css::awt::ImageScaleMode;
  26
  27 ImageControl::ImageControl( vcl::Window* pParent, WinBits nStyle )
  28     :FixedImage( pParent, nStyle )
  29     ,mnScaleMode( ImageScaleMode::ANISOTROPIC )
  30 {
  31 }
  32
  33 void ImageControl::SetScaleMode( const ::sal_Int16 _nMode )
  34 {
  35     if ( _nMode != mnScaleMode )
  36     {
  37         mnScaleMode = _nMode;
  38         Invalidate();
  39     }
  40 }
  41
  42 void ImageControl::Resize()
  43 {
  44     Invalidate();
  45 }
  46
  47 namespace
  48 {
  49     Size lcl_calcPaintSize( const tools::Rectangle& _rPaintRect, const Size& _rBitmapSize )
  50     {
  51         const Size aPaintSize = _rPaintRect.GetSize();
  52
  53         const double nRatioX = 1.0 * aPaintSize.Width() / _rBitmapSize.Width();
  54         const double nRatioY = 1.0 * aPaintSize.Height() / _rBitmapSize.Height();
  55         const double nRatioMin = ::std::min( nRatioX, nRatioY );
  56
  57         return Size( long( _rBitmapSize.Width() * nRatioMin ), long( _rBitmapSize.Height() * nRatioMin ) );
  58     }
  59
  60     Point lcl_centerWithin( const tools::Rectangle& _rArea, const Size& _rObjectSize )
  61     {
  62         Point aPos( _rArea.TopLeft() );
  63         aPos.AdjustX(( _rArea.GetWidth() - _rObjectSize.Width() ) / 2 );
  64         aPos.AdjustY(( _rArea.GetHeight() - _rObjectSize.Height() ) / 2 );
  65         return aPos;
  66     }
  67 }
  68
  69 void ImageControl::ImplDraw(OutputDevice& rDev, const Point& rPos, const Size& rSize) const
  70 {
  71     DrawImageFlags nStyle = DrawImageFlags::NONE;
  72     if ( !IsEnabled() )
  73         nStyle |= DrawImageFlags::Disable;
  74
  75     const Image& rImage( GetModeImage() );
  76     const tools::Rectangle aDrawRect( rPos, rSize );
  77     if (!rImage)
  78     {
  79         OUString  sText( GetText() );
  80         if ( sText.isEmpty() )
  81             return;
  82
  83         WinBits nWinStyle = GetStyle();
  84         DrawTextFlags nTextStyle = FixedText::ImplGetTextStyle( nWinStyle );
  85         if ( !IsEnabled() )
  86             nTextStyle |= DrawTextFlags::Disable;
  87
  88         rDev.DrawText( aDrawRect, sText, nTextStyle );
  89         return;
  90     }
  91
  92     const Size& rBitmapSize = rImage.GetSizePixel();
  93
  94     switch ( mnScaleMode )
  95     {
  96     case ImageScaleMode::NONE:
  97     {
  98         rDev.DrawImage(lcl_centerWithin( aDrawRect, rBitmapSize ), rImage, nStyle);
  99     }
 100     break;
 101
 102     case ImageScaleMode::ISOTROPIC:
 103     {
 104         const Size aPaintSize = lcl_calcPaintSize( aDrawRect, rBitmapSize );
 105         rDev.DrawImage(lcl_centerWithin(aDrawRect, aPaintSize), aPaintSize, rImage, nStyle);
 106     }
 107     break;
 108
 109     case ImageScaleMode::ANISOTROPIC:
 110     {
 111         rDev.DrawImage(
 112             aDrawRect.TopLeft(),
 113             aDrawRect.GetSize(),
 114             rImage, nStyle );
 115     }
 116     break;
 117
 118     default:
 119         OSL_ENSURE( false, "ImageControl::ImplDraw: unhandled scale mode!" );
 120         break;
 121
 122     }   // switch ( mnScaleMode )
 123 }
 124
 125 void ImageControl::Paint(vcl::RenderContext& rRenderContext, const tools::Rectangle& /*rRect*/)
 126 {
 127     ImplDraw(rRenderContext, Point(), GetOutputSizePixel());
 128
 129     if (!HasFocus())
 130         return;
 131
 132     vcl::Window* pBorderWindow = GetWindow(GetWindowType::Border);
 133
 134     bool bFlat = (GetBorderStyle() == WindowBorderStyle::MONO);
 135     tools::Rectangle aRect(Point(0,0), pBorderWindow->GetOutputSizePixel());
 136     Color oldLineCol = pBorderWindow->GetLineColor();
 137     Color oldFillCol = pBorderWindow->GetFillColor();
 138     pBorderWindow->SetFillColor();
 139     pBorderWindow->SetLineColor(bFlat ? COL_WHITE : COL_BLACK);
 140     pBorderWindow->DrawRect(aRect);
 141     aRect.AdjustLeft( 1 );
 142     aRect.AdjustRight( -1 );
 143     aRect.AdjustTop( 1 );
 144     aRect.AdjustBottom( -1 );
 145     pBorderWindow->SetLineColor(bFlat ? COL_BLACK : COL_WHITE);
 146     pBorderWindow->DrawRect(aRect);
 147     pBorderWindow->SetLineColor(oldLineCol);
 148     pBorderWindow->SetFillColor(oldFillCol);
 149
 150 }
 151
 152 void ImageControl::Draw( OutputDevice* pDev, const Point& rPos, const Size& rSize, DrawFlags )
 153 {
 154     const Point     aPos  = pDev->LogicToPixel( rPos );
 155     const Size      aSize = pDev->LogicToPixel( rSize );
 156     tools::Rectangle aRect( aPos, aSize );
 157
 158     pDev->Push();
 159     pDev->SetMapMode();
 160
 161     // Border
 162     if ( GetStyle() & WB_BORDER )
 163     {
 164         ImplDrawFrame( pDev, aRect );
 165     }
 166     pDev->IntersectClipRegion( aRect );
 167     ImplDraw( *pDev, aRect.TopLeft(), aRect.GetSize() );
 168
 169     pDev->Pop();
 170 }
 171
 172 void ImageControl::GetFocus()
 173 {
 174     FixedImage::GetFocus();
 175     GetWindow( GetWindowType::Border )->Invalidate();
 176 }
 177
 178 void ImageControl::LoseFocus()
 179 {
 180     FixedImage::GetFocus();
 181     GetWindow( GetWindowType::Border )->Invalidate();
 182 }
 183
 184 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */