slideshow/source/engine/pointersymbol.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/b2dvector.hxx>
  27
  28 #include <com/sun/star/rendering/XCanvas.hpp>
  29 #include <com/sun/star/presentation/XSlideShowView.hpp>
  30 #include <comphelper/diagnose_ex.hxx>
  31
  32 #include "pointersymbol.hxx"
  33 #include <eventmultiplexer.hxx>
  34
  35 #include <algorithm>
  36 #include <utility>
  37
  38
  39 using namespace com::sun::star;
  40
  41 namespace slideshow::internal {
  42
  43 PointerSymbolSharedPtr PointerSymbol::create( const uno::Reference<rendering::XBitmap>& xBitmap,
  44                                               ScreenUpdater&                            rScreenUpdater,
  45                                               EventMultiplexer&                         rEventMultiplexer,
  46                                               const UnoViewContainer&                   rViewContainer )
  47 {
  48     PointerSymbolSharedPtr pRet(
  49         new PointerSymbol( xBitmap,
  50                            rScreenUpdater,
  51                            rViewContainer ));
  52
  53     rEventMultiplexer.addViewHandler( pRet );
  54
  55     return pRet;
  56 }
  57
  58 PointerSymbol::PointerSymbol( uno::Reference<rendering::XBitmap>           xBitmap,
  59                               ScreenUpdater&                               rScreenUpdater,
  60                               const UnoViewContainer&                      rViewContainer ) :
  61     mxBitmap(std::move(xBitmap)),
  62     maViews(),
  63     mrScreenUpdater( rScreenUpdater ),
  64     maPos(),
  65     mbVisible(false)
  66 {
  67     for( const auto& rView : rViewContainer )
  68         viewAdded( rView );
  69 }
  70
  71 void PointerSymbol::setVisible( const bool bVisible )
  72 {
  73     if( mbVisible == bVisible )
  74         return;
  75
  76     mbVisible = bVisible;
  77
  78     for( const auto& rView : maViews )
  79     {
  80         if( rView.second )
  81         {
  82             if( bVisible )
  83                 rView.second->show();
  84             else
  85                 rView.second->hide();
  86         }
  87     }
  88
  89     // sprites changed, need a screen update for this frame.
  90     mrScreenUpdater.requestImmediateUpdate();
  91 }
  92
  93 basegfx::B2DPoint PointerSymbol::calcSpritePos(UnoViewSharedPtr const & rView) const
  94 {
  95     const awt::Rectangle aViewArea( rView->getUnoView()->getCanvasArea() );
  96     const geometry::IntegerSize2D realTranslationOffset ( rView->getTranslationOffset() );
  97
  98     return basegfx::B2DPoint(
  99         realTranslationOffset.Width + (aViewArea.Width * maPos.X),
 100         realTranslationOffset.Height + (aViewArea.Height * maPos.Y));
 101 }
 102
 103 void PointerSymbol::viewAdded( const UnoViewSharedPtr& rView )
 104 {
 105     cppcanvas::CustomSpriteSharedPtr sprite;
 106
 107     try
 108     {
 109         const geometry::IntegerSize2D spriteSize( mxBitmap->getSize() );
 110         sprite = rView->createSprite( basegfx::B2DSize( spriteSize.Width,
 111                                                           spriteSize.Height ),
 112                                       1000.0 ); // sprite should be in front of all
 113                                                 // other sprites
 114         rendering::ViewState viewState;
 115         canvas::tools::initViewState( viewState );
 116         rendering::RenderState renderState;
 117         canvas::tools::initRenderState( renderState );
 118         sprite->getContentCanvas()->getUNOCanvas()->drawBitmap(
 119             mxBitmap, viewState, renderState );
 120
 121         sprite->setAlpha( 0.9 );
 122         sprite->movePixel( calcSpritePos( rView ) );
 123         if( mbVisible )
 124             sprite->show();
 125     }
 126     catch( uno::Exception& )
 127     {
 128         TOOLS_WARN_EXCEPTION( "slideshow", "" );
 129     }
 130
 131     maViews.emplace_back( rView, sprite );
 132 }
 133
 134 void PointerSymbol::viewRemoved( const UnoViewSharedPtr& rView )
 135 {
 136     maViews.erase(
 137         std::remove_if(
 138             maViews.begin(), maViews.end(),
 139             [&rView]
 140             ( const ViewsVecT::value_type& cp )
 141             { return rView == cp.first; } ),
 142         maViews.end() );
 143 }
 144
 145 void PointerSymbol::viewChanged( const UnoViewSharedPtr& rView )
 146 {
 147     // find entry corresponding to modified view
 148     ViewsVecT::iterator aModifiedEntry(
 149         std::find_if(
 150             maViews.begin(),
 151             maViews.end(),
 152             [&rView]
 153             ( const ViewsVecT::value_type& cp )
 154             { return rView == cp.first; } ) );
 155
 156     OSL_ASSERT( aModifiedEntry != maViews.end() );
 157     if( aModifiedEntry == maViews.end() )
 158         return;
 159
 160     if( aModifiedEntry->second )
 161         aModifiedEntry->second->movePixel(
 162             calcSpritePos(aModifiedEntry->first) );
 163 }
 164
 165 void PointerSymbol::viewsChanged()
 166 {
 167     // reposition sprites on all views
 168     for( const auto& rView : maViews )
 169     {
 170         if( rView.second )
 171             rView.second->movePixel(
 172                 calcSpritePos( rView.first ) );
 173     }
 174 }
 175
 176 void PointerSymbol::viewsChanged(const geometry::RealPoint2D pos)
 177 {
 178     if( pos.X == maPos.X && pos.Y == maPos.Y )
 179         return;
 180
 181     maPos = pos;
 182
 183     // reposition sprites on all views
 184     for( const auto& rView : maViews )
 185     {
 186         if( rView.second )
 187         {
 188             rView.second->movePixel(
 189                 calcSpritePos( rView.first ) );
 190             mrScreenUpdater.notifyUpdate();
 191             mrScreenUpdater.commitUpdates();
 192         }
 193     }
 194 }
 195
 196 } // namespace slideshow::internal
 197
 198 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */