Change the position of Label of the QwtPlotMarker

[kerberos84]

Hello i am using qwt 5.2 and qt 4.6 versions.

1) I checked the itemeditor example and hence qwt_widget_overlay class does not exist in qwt 5.2 i copied it to my project and tried to compile it.

But when i compile it i get a linking error for the line "QMetaObject::invokeMethod" line. I think the method trying to be invoked does not exist in my qwt version, right? (QwtPlotCanvas::borderPath).

What can i do in this situation? Please help, i have written everything for moving label, only this left.

void QwtWidgetOverlay::draw( QPainter *painter ) const
{
    QWidget *widget = const_cast< QWidget *>( parentWidget() );
    if ( widget )
    {
        painter->setClipRect( parentWidget()->contentsRect() );
 
        // something special for the plot canvas
        QPainterPath clipPath;
 
        ( void )QMetaObject::invokeMethod(
            widget, "borderPath", Qt::DirectConnection,
            Q_RETURN_ARG( QPainterPath, clipPath ), Q_ARG( QRect, rect() ) );
 
        if (!clipPath.isEmpty())
        {
            painter->setClipPath( clipPath, Qt::IntersectClip );
        }
    }
 
    drawOverlay( painter );
}

void QwtWidgetOverlay::draw( QPainter *painter ) const
{
    QWidget *widget = const_cast< QWidget *>( parentWidget() );
    if ( widget )
    {
        painter->setClipRect( parentWidget()->contentsRect() );

        // something special for the plot canvas
        QPainterPath clipPath;

        ( void )QMetaObject::invokeMethod(
            widget, "borderPath", Qt::DirectConnection,
            Q_RETURN_ARG( QPainterPath, clipPath ), Q_ARG( QRect, rect() ) );

        if (!clipPath.isEmpty())
        {
            painter->setClipPath( clipPath, Qt::IntersectClip );
        }
    }

    drawOverlay( painter );
}

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2) in the QwtWidgetOverlay class it calls "QwtPlotCanvas::invalidateBackingStore" method. Again this method does not exist in qwt 5.2. There is a method called "invalidateCache" in qwt 5.2.
Does it do the similar things? Can i use it?