Pixmap Overlay

[ToddAtWSU]

Should it matter what the activeX control wants since I have my DirectShow object inside a QAxWidget? I would think the QAxWidget would allow an alomst-transparent QPixmap to be displayed over it. Or does the QAxWidget have no control or say over this? Thanks again but I will take what you said into consideration!

[ToddAtWSU]

After looking through adding an overlay through some DirectShow commands, I discovered DirectShow's functionality to add the overlay was not sufficient enough to handle my needs. Right now, I am trying to just create an overlay to put on top of my buttons to get a handle on how to use transparent overlays. Here is essentially what I want it to do.

I intialize a couple things like this:

QWidget* privateLayoutWidget = new QWidget( this );
	privateLayoutWidget->setGeometry( QRect( 182, 429, 248, 40 ) );
	mpButtonLayout = new QHBoxLayout( privateLayoutWidget );
 
	QSize videoButtonSize( 30, 25 );
	mpGoBeginningButton = new QToolButton( privateLayoutWidget );
	mpGoBeginningButton->setMinimumSize(videoButtonSize );
	QFont webDings_font( "Webdings", 12 );
	mpGoBeginningButton->setFont( webDings_font ); 
	mpGoBeginningButton->setText( "9" );
	mpGoBeginningButton->setToolTip( "Jump to beginning of video" );
	mpButtonLayout->addWidget( mpGoBeginningButton );
                ...
   mpTest = new QPixmap( 500, 500 );
   mpTest->fill( Qt::transparent );

QWidget* privateLayoutWidget = new QWidget( this );
	privateLayoutWidget->setGeometry( QRect( 182, 429, 248, 40 ) );
	mpButtonLayout = new QHBoxLayout( privateLayoutWidget );

	QSize videoButtonSize( 30, 25 );
	mpGoBeginningButton = new QToolButton( privateLayoutWidget );
	mpGoBeginningButton->setMinimumSize(videoButtonSize );
	QFont webDings_font( "Webdings", 12 );
	mpGoBeginningButton->setFont( webDings_font ); 
	mpGoBeginningButton->setText( "9" );
	mpGoBeginningButton->setToolTip( "Jump to beginning of video" );
	mpButtonLayout->addWidget( mpGoBeginningButton );
                ...
   mpTest = new QPixmap( 500, 500 );
   mpTest->fill( Qt::transparent );

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Then to draw my pixmap onto my object, I do the following:

if( event->type( ) == QEvent::Paint )
   {
      if( pMediaSeeking != NULL )
      {
         QPainter* painter2;
         painter2 = new QPainter( mpTest );
         painter2->setPen( QPen( Qt::green, 3 ) );
         for( int i = 0 ; i < azElPoints.size( ) ; i++ )
         {
            if( azElPoints[i].frameNumber == getCurrentFrame( ) )
            {
               if( erasePoint == true )
               {
                   // Fill the overlay with transparent again since using a
                   // transparent pen does not remove the red dot.
                  mpTest->fill( Qt::transparent );
               }
               painter2->drawPoint( azElPoints[i].xPos, azElPoints[i].yPos );
            }
         }
         //updateAlphaBitmap( );
         repaintWindow( );
         delete painter2;
         QPainter *painter = new QPainter( mpGoBeginningButton );
         painter->drawPixmap( 0, 0, *mpTest ); 
         delete painter;
         return true;
      }
   }

if( event->type( ) == QEvent::Paint )
   {
      if( pMediaSeeking != NULL )
      {
         QPainter* painter2;
         painter2 = new QPainter( mpTest );
         painter2->setPen( QPen( Qt::green, 3 ) );
         for( int i = 0 ; i < azElPoints.size( ) ; i++ )
         {
            if( azElPoints[i].frameNumber == getCurrentFrame( ) )
            {
               if( erasePoint == true )
               {
                   // Fill the overlay with transparent again since using a
                   // transparent pen does not remove the red dot.
                  mpTest->fill( Qt::transparent );
               }
               painter2->drawPoint( azElPoints[i].xPos, azElPoints[i].yPos );
            }
         }
         //updateAlphaBitmap( );
         repaintWindow( );
         delete painter2;
         QPainter *painter = new QPainter( mpGoBeginningButton );
         painter->drawPixmap( 0, 0, *mpTest ); 
         delete painter;
         return true;
      }
   }

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Is this the correct way to try and make a transparent QPixmap because if so, I cannot get it to work. I am thinking maybe I should do something other than a fill( transparent ) to make the transparent QPixmap besides the occasional dot of color, but I do not know what it is that I am missing. Any more guidance with this would be great! Thanks!