C++ (Cpp) QwtText::backgroundBrush Examples

Example #1

File: qwt_picker.cpp Project: LeeSaferite/OpenPilot

void QwtPicker::PickerWidget::updateMask()
{
    QRegion mask;

    if ( d_type == RubberBand )
    {
        QBitmap bm(width(), height());
        bm.fill(Qt::color0);

        QPainter painter(&bm);
        QPen pen = d_picker->rubberBandPen();
        pen.setColor(Qt::color1);
        painter.setPen(pen);

        d_picker->drawRubberBand(&painter);

        mask = QRegion(bm);
    }
    if ( d_type == Text )
    {
        d_hasTextMask = true;
#if QT_VERSION >= 0x040300
        if ( !parentWidget()->testAttribute(Qt::WA_PaintOnScreen) )
        {
#if 0
            if ( parentWidget()->paintEngine()->type() != QPaintEngine::OpenGL )
#endif
            {
                // With Qt >= 4.3 drawing of the tracker can be implemented in an
                // easier way, using the textRect as mask. 

                d_hasTextMask = false;
            }
        }
#endif
        
        if ( d_hasTextMask )
        {
            const QwtText label = d_picker->trackerText(
                d_picker->trackerPosition());
            if ( label.testPaintAttribute(QwtText::PaintBackground)
                && label.backgroundBrush().style() != Qt::NoBrush )
            {
#if QT_VERSION >= 0x040300
                if ( label.backgroundBrush().color().alpha() > 0 )
#endif
                // We don't need a text mask, when we have a background
                d_hasTextMask = false;
            }
        }

        if ( d_hasTextMask )
        {
            QBitmap bm(width(), height());
            bm.fill(Qt::color0);

            QPainter painter(&bm);
            painter.setFont(font());

            QPen pen = d_picker->trackerPen();
            pen.setColor(Qt::color1);
            painter.setPen(pen);

            d_picker->drawTracker(&painter);

            mask = QRegion(bm);
        }
        else
        {
            mask = d_picker->trackerRect(font());
        }
    }

#if QT_VERSION < 0x040000
    QWidget *w = parentWidget();
    const bool doUpdate = w->isUpdatesEnabled();
    const Qt::BackgroundMode bgMode = w->backgroundMode();
    w->setUpdatesEnabled(false);
    if ( bgMode != Qt::NoBackground )
        w->setBackgroundMode(Qt::NoBackground);
#endif

    setMask(mask);

#if QT_VERSION < 0x040000
    if ( bgMode != Qt::NoBackground )
        w->setBackgroundMode(bgMode);

    w->setUpdatesEnabled(doUpdate);
#endif

    setShown(!mask.isEmpty());
}

Example #2

File: qwt_picker.cpp Project: dcardenasnl/Test

void QwtPicker::PickerWidget::updateMask()
{
    QRegion mask;

    if ( d_type == RubberBand )
    {
        QBitmap bm( width(), height() );
        bm.fill( Qt::color0 );

        QPainter painter( &bm );
        QPen pen = d_picker->rubberBandPen();
        pen.setColor( Qt::color1 );
        painter.setPen( pen );

        d_picker->drawRubberBand( &painter );

        mask = QRegion( bm );
    }
    if ( d_type == Text )
    {
        d_hasTextMask = parentWidget()->testAttribute( Qt::WA_PaintOnScreen );

        if ( d_hasTextMask )
        {
            const QwtText label = d_picker->trackerText(
                d_picker->trackerPosition() );

            if ( label.testPaintAttribute( QwtText::PaintBackground )
                && label.backgroundBrush().style() != Qt::NoBrush )
            {
                if ( label.backgroundBrush().color().alpha() > 0 )
                {
                    // We don't need a text mask, when we have a background
                    d_hasTextMask = false;
                }
            }
        }

        if ( d_hasTextMask )
        {
            QBitmap bm( width(), height() );
            bm.fill( Qt::color0 );

            QPainter painter( &bm );
            painter.setFont( font() );

            QPen pen = d_picker->trackerPen();
            pen.setColor( Qt::color1 );
            painter.setPen( pen );

            d_picker->drawTracker( &painter );

            mask = QRegion( bm );
        }
        else
        {
            mask = d_picker->trackerRect( font() );
        }
    }

    QWidget *w = parentWidget();
    if ( w && !w->testAttribute( Qt::WA_PaintOnScreen ) )
    {
        // The parent widget gets an update for its complete rectangle
        // when the mask is changed in visible state.
        // With this hide/show we only get an update for the
        // previous mask.

        hide();
    }
    setMask( mask );
    setVisible( !mask.isEmpty() );
}