src/can/canCanvas.cpp

   1 /*
   2 Qanava - Graph drawing library for QT
   3 Copyright (C) 2005 Benoit AUTHEMAN
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 */
  19
  20 //-----------------------------------------------------------------------------
  21 // This file is a part of the Qanava software.
  22 //
  23 // \file        canCanvas.cpp
  24 // \author      Benoit Autheman (benoit@faktiss.net)
  25 // \date        2004 October 13
  26 //-----------------------------------------------------------------------------
  27
  28
  29 // Qanava headers
  30 #include "canCanvas.h"
  31
  32
  33 // QT headers
  34 #include <qwmatrix.h>
  35
  36
  37 namespace qan {  // ::qan
  38 namespace can {  // ::qan::can
  39
  40
  41 /* Image Management *///-------------------------------------------------------
  42 QImage*         ImageManager::getImage( const std::string& fileName )
  43 {
  44         NameImageMap::iterator imageIter = _nameImageMap.find( fileName );
  45         if ( imageIter != _nameImageMap.end( ) )
  46                 return ( *imageIter ).second;
  47         else
  48         {
  49                 QImage* image = new QImage( fileName.c_str( ) );
  50                 if ( image != 0 && image->isNull( ) )
  51                 {
  52                         delete image;
  53                         return 0;
  54                 }
  55                 else if ( image != 0 && !image->isNull( ) )
  56                 {
  57                         _nameImageMap.insert( std::pair< const std::string, QImage* >( fileName, image ) );
  58                         return image;
  59                 }
  60         }
  61
  62         return 0;
  63 }
  64 //-----------------------------------------------------------------------------
  65
  66
  67
  68 /* Canvas Constructor/Destructor *///------------------------------------------
  69 Canvas::Canvas( int w, int h, QColor backColor ) :
  70         QCanvas( w, h ),
  71         _view( 0 ),
  72         _grid( *this )
  73 {
  74         setDoubleBuffering( true );
  75         setBackgroundColor( backColor );
  76         setAdvancePeriod( 30 );  // Fix a refresh bug with shadows (item affected by style do not refresh the
  77                                  // canvas state properly
  78
  79         // Connect the resized() signal to slot canvasResized()
  80         connect( this, SIGNAL(resized()), this, SLOT(canvasResized()) );
  81 }
  82 //-----------------------------------------------------------------------------
  83
  84
  85
  86 /* Item Management  *///-------------------------------------------------------
  87 void    Canvas::addItem( Item& item )
  88 {
  89         _items.push_back( &item );
  90 }
  91
  92 Canvas::Items&  Canvas::getItems( )
  93 {
  94         return _items;
  95 }
  96
  97 bool    Canvas::isFreed( void* item )
  98 {
  99         std::set< void* >::const_iterator itemIter = _freezed.find( item );
 100         if ( itemIter != _freezed.end( ) )
 101                 return true;
 102         return false;
 103 }
 104
 105 void    Canvas::setFreezed(  void* item )
 106 {
 107         _freezed.insert( item );
 108 }
 109
 110 void    Canvas::canvasResized( )
 111 {
 112         getGrid( ).resize( width( ), height( ) );
 113 }
 114 //-----------------------------------------------------------------------------
 115
 116
 117 } // ::qan::can
 118 } // ::qan