Change the color of QRubberBand

[aamer4yu]

Quote:
Originally Posted by aamer4yu View Post
Try this -
painter.setOpacity(0.5)... in the paintEvent
It doesn't work.

Hope it does now

[franco.amato]

Hope it does now

Sure, thank you.
I would also change the border color.
Lykurg suggested to me to use QPainter::setPen() but how? I only would
draw the border of a specified color and not all.

Best

[Lykurg]

Lykurg suggested to me to use QPainter::setPen() but how?

Come on, that's not a big deal, it like you set the opacity. And since you obviously don't need a style aware rubber band, get rid of that QStyleOptionFocusRect stuff and draw that rubber rect yourself using QPainter::drawRect(). This will also increase your speed.

[franco.amato]

Come on, that's not a big deal, it like you set the opacity. And since you obviously don't need a style aware rubber band, get rid of that QStyleOptionFocusRect stuff and draw that rubber rect yourself using QPainter::drawRect(). This will also increase your speed.

But wich QRect must I pass to the drawRect method?

[franco.amato]

I changed the code so but it doesn't work well:

class WfRubberBand : public QRubberBand
{
public:
 
	WfRubberBand( Shape s, QWidget * p = 0 ) : QRubberBand( s, p ) 
	{
		QPalette palette;
		//palette.setBrush( QPalette::WindowText, QBrush( Qt::red ) );
		palette.setBrush( QPalette::Foreground, QBrush( Qt::red ) );
		setPalette(palette);
	}
 
protected:
 
	virtual void paintEvent( QPaintEvent *pe ) 
	{
		QStylePainter painter( this );
		QRect rect = pe->rect();
 
		QPen pen( Qt::blue, 1 ); // blue solid line, 1 pixels wide
		painter.setPen( pen );
		// QStyleOptionFocusRect option;
		// option.initFrom( this );
		painter.setOpacity( 0.3 );
		// painter.drawControl(QStyle::CE_FocusFrame, option);
		painter.drawRect( rect );
	}
};

class WfRubberBand : public QRubberBand
{
public:

	WfRubberBand( Shape s, QWidget * p = 0 ) : QRubberBand( s, p ) 
	{
		QPalette palette;
		//palette.setBrush( QPalette::WindowText, QBrush( Qt::red ) );
		palette.setBrush( QPalette::Foreground, QBrush( Qt::red ) );
		setPalette(palette);
	}

protected:

	virtual void paintEvent( QPaintEvent *pe ) 
	{
		QStylePainter painter( this );
		QRect rect = pe->rect();

		QPen pen( Qt::blue, 1 ); // blue solid line, 1 pixels wide
		painter.setPen( pen );
		// QStyleOptionFocusRect option;
		// option.initFrom( this );
		painter.setOpacity( 0.3 );
		// painter.drawControl(QStyle::CE_FocusFrame, option);
		painter.drawRect( rect );
	}
};

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The rect is not filled with the red color, but it's empty.
Where my code is wrong?

[Lykurg]

Use QPainter instead of QStylePainter since you don't use it's possibilities. And then use QPainter::setBrush() to define the fill color.

[franco.amato]

Use QPainter instead of QStylePainter since you don't use it's possibilities. And then use QPainter::setBrush() to define the fill color.

It works,
thank you

[clement]

Hi

just for those not wanting to re-implement a paint event for changing colors:

calling

setStyleSheet("selection-background-color: yellow");

setStyleSheet("selection-background-color: yellow");

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on a QRubberBand changes the background color of the selected area to yellow as expected.

Hope this will help someone.

Clément.