slideshow/source/engine/waitsymbol.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 <canvas/canvastools.hxx>
  22
  23 #include <cppcanvas/customsprite.hxx>
  24
  25 #include <basegfx/point/b2dpoint.hxx>
  26 #include <basegfx/vector/b2dsize.hxx>
  27 #include <basegfx/vector/b2dvector.hxx>
  28
  29 #include <com/sun/star/rendering/XCanvas.hpp>
  30 #include <com/sun/star/presentation/XSlideShowView.hpp>
  31 #include <comphelper/diagnose_ex.hxx>
  32
  33 #include "waitsymbol.hxx"
  34 #include <eventmultiplexer.hxx>
  35
  36 #include <algorithm>
  37 #include <utility>
  38
  39
  40 using namespace com::sun::star;
  41
  42 namespace slideshow::internal {
  43
  44 const sal_Int32 LEFT_BORDER_SPACE  = 10;
  45 const sal_Int32 LOWER_BORDER_SPACE = 10;
  46
  47 WaitSymbolSharedPtr WaitSymbol::create( const uno::Reference<rendering::XBitmap>& xBitmap,
  48                                         ScreenUpdater&                            rScreenUpdater,
  49                                         EventMultiplexer&                         rEventMultiplexer,
  50                                         const UnoViewContainer&                   rViewContainer )
  51 {
  52     WaitSymbolSharedPtr pRet(
  53         new WaitSymbol( xBitmap,
  54                         rScreenUpdater,
  55                         rViewContainer ));
  56
  57     rEventMultiplexer.addViewHandler( pRet );
  58
  59     return pRet;
  60 }
  61
  62 WaitSymbol::WaitSymbol( uno::Reference<rendering::XBitmap>           xBitmap,
  63                         ScreenUpdater&                               rScreenUpdater,
  64                         const UnoViewContainer&                      rViewContainer ) :
  65     mxBitmap(std::move(xBitmap)),
  66     maViews(),
  67     mrScreenUpdater( rScreenUpdater ),
  68     mbVisible(false)
  69 {
  70     for( const auto& pView : rViewContainer )
  71         viewAdded( pView );
  72 }
  73
  74 void WaitSymbol::setVisible( const bool bVisible )
  75 {
  76     if( mbVisible == bVisible )
  77         return;
  78
  79     mbVisible = bVisible;
  80
  81     for( const auto& rView : maViews )
  82     {
  83         if( rView.second )
  84         {
  85             if( bVisible )
  86                 rView.second->show();
  87             else
  88                 rView.second->hide();
  89         }
  90     }
  91
  92     // sprites changed, need a screen update for this frame.
  93     mrScreenUpdater.requestImmediateUpdate();
  94 }
  95
  96 basegfx::B2DPoint WaitSymbol::calcSpritePos(
  97     UnoViewSharedPtr const & rView ) const
  98 {
  99     const awt::Rectangle aViewArea( rView->getUnoView()->getCanvasArea() );
 100     return basegfx::B2DPoint(
 101         aViewArea.X + std::min<sal_Int32>( aViewArea.Width, LEFT_BORDER_SPACE ),
 102         aViewArea.X + std::max<sal_Int32>( 0,
 103                                            aViewArea.Height
 104                                             - mxBitmap->getSize().Height
 105                                             - LOWER_BORDER_SPACE ) );
 106 }
 107
 108 void WaitSymbol::viewAdded( const UnoViewSharedPtr& rView )
 109 {
 110     cppcanvas::CustomSpriteSharedPtr sprite;
 111
 112     try
 113     {
 114         const geometry::IntegerSize2D spriteSize( mxBitmap->getSize() );
 115         sprite = rView->createSprite( basegfx::B2DSize( spriteSize.Width,
 116                                                           spriteSize.Height ),
 117                                       1000.0 ); // sprite should be in front of all
 118                                                 // other sprites
 119         rendering::ViewState viewState;
 120         canvas::tools::initViewState( viewState );
 121         rendering::RenderState renderState;
 122         canvas::tools::initRenderState( renderState );
 123         sprite->getContentCanvas()->getUNOCanvas()->drawBitmap(
 124             mxBitmap, viewState, renderState );
 125
 126         sprite->setAlpha( 0.9 );
 127         sprite->movePixel( calcSpritePos( rView ) );
 128         if( mbVisible )
 129             sprite->show();
 130     }
 131     catch( uno::Exception& )
 132     {
 133         TOOLS_WARN_EXCEPTION( "slideshow", "" );
 134     }
 135
 136     maViews.emplace_back( rView, sprite );
 137 }
 138
 139 void WaitSymbol::viewRemoved( const UnoViewSharedPtr& rView )
 140 {
 141     std::erase_if(
 142             maViews,
 143             [&rView]
 144             ( const ViewsVecT::value_type& cp )
 145             { return rView == cp.first; } );
 146 }
 147
 148 void WaitSymbol::viewChanged( const UnoViewSharedPtr& rView )
 149 {
 150     // find entry corresponding to modified view
 151     ViewsVecT::iterator aModifiedEntry(
 152         std::find_if(
 153             maViews.begin(),
 154             maViews.end(),
 155             [&rView]
 156             ( const ViewsVecT::value_type& cp )
 157             { return rView == cp.first; } ) );
 158
 159     OSL_ASSERT( aModifiedEntry != maViews.end() );
 160     if( aModifiedEntry == maViews.end() )
 161         return;
 162
 163     if( aModifiedEntry->second )
 164         aModifiedEntry->second->movePixel(
 165             calcSpritePos(aModifiedEntry->first) );
 166 }
 167
 168 void WaitSymbol::viewsChanged()
 169 {
 170     // reposition sprites on all views
 171     for( const auto& rView : maViews )
 172     {
 173         if( rView.second )
 174             rView.second->movePixel(
 175                 calcSpritePos( rView.first ) );
 176     }
 177 }
 178
 179 } // namespace slideshow::internal
 180
 181 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */