QT4 version for QT3 setBackgroundMode( NoBackground )

[jiveaxe]

Hi,
I'm trying to add an "on screen display" object to my application like amarok's osd. So reading Amarok 1.4.9 source code I have found the code in the object in the class OSDWidget of the files osd.h/osd.cpp. Here a sample:

class OSDWidget : public QWidget
{
    Q_OBJECT
 
           OSDWidget( QWidget *parent, const char *name = "osd" );
...
};
 
OSDWidget::OSDWidget( QWidget *parent, const char *name )
        : QWidget( parent, name)
{
    ...
    setBackgroundMode( NoBackground );
    ...
}

class OSDWidget : public QWidget
{
    Q_OBJECT

           OSDWidget( QWidget *parent, const char *name = "osd" );
...
};

OSDWidget::OSDWidget( QWidget *parent, const char *name )
        : QWidget( parent, name)
{
    ...
    setBackgroundMode( NoBackground );
    ...
}

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How port that line in qt4? Perhaps the solution is QWidget::setBackgroundRole but there isn't a Qt::NoBackground.

Or anybody knows a simple code?

Thanks

[jacek]

NoBackground != transparency. It just means that Qt doesn't draw the default background before calling paintEvent(). In Qt 4 you can achieve the same by setting WA_OpaquePaintEvent attribute.

[jiveaxe]

Very thanks, jacek.