Russian Qt Forum

#include <QGraphicsScene>

Legend::Legend(QGraphicsItem *parent, QString caption) :
        QGraphicsItem(parent) {
	setCacheMode(DeviceCoordinateCache);
	setZValue(8);
        //angle=10000.0;
	this->setFlag(QGraphicsItem::ItemIgnoresTransformations, true);
	this->caption = caption;
        QPainter p;
        QFontMetrics fm(p.font());
        QRectF rect=fm.boundingRect(caption);
        this->myrect=rect;
}

void Legend::setRect(QRectF rect) {
	this->myrect = rect;
}

void Legend::setCaption(QString caption) {
	this->caption = caption;
	update();
}

QString Legend::getCaption() {
	return this->caption;
}

QRectF Legend::boundingRect() const {
        return this->myrect;
}

QPainterPath Legend::shape() const {
	QPainterPath path;
	path.addRect(this->myrect);
	return path;
}

void Legend::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget) {
        if (this->myrect == QRectF(0, 0, 1000, 30)) {
		QRectF rect = painter->boundingRect(QRect(0, 0, 1000, 30),
				this->caption);
		this->myrect.setWidth(rect.width() + 4);
		this->myrect.setHeight(rect.height() + 2);
        } else {
		painter->setRenderHints(QPainter::Antialiasing, false);
		painter->setPen(QPen(Qt::black, 0));
		painter->setBrush(Qt::white);
		painter->drawRect(this->myrect);
		painter->drawText(this->myrect.x() + 3, this->myrect.y()
				+ this->myrect.height() - 3, this->caption);
        }
}