Hi,

Can someone please verify this? Click the 3rd button on the viewer, and print to a file, it appears to be a bug.

Qt Code: 
  1. #include <QtGui>
  2.  
  3. class MyGraphicsView : public QGraphicsView {
  4. public:
  5.   MyGraphicsView( QGraphicsScene * scene ) :
  6.     QGraphicsView( scene ) {
  7.   }
  8.  
  9. protected:
  10.  
  11.   virtual void contextMenuEvent ( QContextMenuEvent * event ) {
  13.     al << "Print..." << "Save as an image file...";
  14.  
  15.     QMenu menu;
  16.     for ( QStringList::const_iterator it=al.begin(); it!=al.end(); it++ ) {
  17.       menu.addAction( (*it) );
  18.     }
  19.  
  20.     QAction* action = menu.exec( event->globalPos() );
  21.     if ( action ) {
  22.       takeAction( al.indexOf( action->text() ) );
  23.     }
  24.  
  25.   }
  26.  
  27. private:
  28.  
  29.   void takeAction( int idx ) {
  30.     switch ( idx ) {
  31.     case 0: {
  32.       QPrinter printer( QPrinter::HighResolution );
  33.       printer.setDocName( "test" );
  34.       printer.setCreator( "test example" );
  35.       printer.setOrientation( QPrinter::Landscape );
  36.       QPrintDialog dialog( &printer );
  37.       if ( dialog.exec() ) {
  38.         QPainter painter( &printer );
  39.         scene()->render( &painter );
  40.       }
  41.     } break;
  42.     case 1: {
  43.       QString filter( "*.bmp *.jpg *.jpeg *.png *.ppm *.tiff *.xbm *.xpm" );
  44.       QString filename = QFileDialog::getSaveFileName( this, "Save as image",
  45.                                                        "", filter );
  46.       if ( !filename.isEmpty() ) {
  47.         QRectF frame( scene()->sceneRect() );
  48.         frame.moveTo( 0., 0. );
  49.         QImage image( frame.size().toSize(), QImage::Format_RGB32 );
  50.         QPainter painter( &image );
  51.         painter.fillRect( frame, QBrush( Qt::white ) );
  52.         scene()->render( &painter );
  53.         if ( !image.save( filename ) ) {
  54.           qDebug() << "Fail to save file";
  55.         }
  56.       }
  57.     } break;
  58.     }
  59.  
  60.   }
  61.  
  62. };
  63.  
  64. class MyImageItem : public QGraphicsItem {
  65. public:
  66.  
  67.   MyImageItem( QGraphicsItem* parent=0 ) :
  68.     QGraphicsItem( parent ) {
  69.   }
  70.  
  71.   QRectF boundingRect() const {
  72.     return QRectF( 0, 0, 400, 400 );
  73.   }
  74.  
  75.   void paint( QPainter *painter,
  76.               const QStyleOptionGraphicsItem *option,
  77.               QWidget* widget ) {
  78.  
  79.     QPen pen( Qt::red );
  80.     painter->setPen( pen );
  81.  
  82.     // create a mono image
  83.     QImage image( boundingRect().size().toSize(), QImage::Format_Mono );
  84.  
  85.     // set color1 to be transparent and fill the image
  86.     image.setColor( Qt::color1, Qt::transparent );
  87.     image.fill( Qt::color1 );
  88.  
  89.     // set foreground color
  90.     image.setColor( Qt::color0, pen.color().rgb() );
  91.  
  92.     for ( int ix = 0; ix < image.width(); ix++ ) {
  93.       image.setPixel( QPoint( ix, 1 ), Qt::color0 );
  94.       image.setPixel( QPoint( ix, image.height()/2 ), Qt::color0 );
  95.       image.setPixel( QPoint( ix, image.height() - 1 ), Qt::color0 );
  96.     }
  97.  
  98.     for ( int iy = 0; iy < image.height(); iy++ ) {
  99.       image.setPixel( QPoint( 1, iy ), Qt::color0 );
  100.       image.setPixel( QPoint( image.width()/2, iy ), Qt::color0 );
  101.       image.setPixel( QPoint( image.width()-1, iy ), Qt::color0 );
  102.     }
  103.  
  104.     painter->drawImage( image.rect(), image );
  105.     //painter->drawPixmap( QPoint( 0, 0 ), QBitmap::fromImage( image ) );
  106.  
  107.   }
  108.  
  109. };
  110.  
  111. int main( int argc, char** argv )
  112. {
  113.   QApplication app( argc, argv );
  115.   scene->setSceneRect( QRectF( 0, 0, 450, 450 ) );
  116.  
  117.   MyImageItem imgItem;
  118.   imgItem.setPos( 50, 50 );
  119.  
  120.   scene->addItem( &imgItem );
  121.  
  122.   // view
  123.   MyGraphicsView view( scene );
  124.   view.resize( 500, 500 );
  125.   view.show();
  126.  
  127.   return app.exec();
  128.  
  129. }
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