roundrectitem.cpp Example File

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 #include "roundrectitem.h"

 #include <QtWidgets/QtWidgets>

 RoundRectItem::RoundRectItem(const QRectF &bounds, const QColor &color,
                              QGraphicsItem *parent)
     : QGraphicsObject(parent), fillRect(false), bounds(bounds)
 {
     gradient.setStart(bounds.topLeft());
     gradient.setFinalStop(bounds.bottomRight());
     gradient.setColorAt(0, color);
     gradient.setColorAt(1, color.dark(200));
     setCacheMode(ItemCoordinateCache);
 }

 QPixmap RoundRectItem::pixmap() const
 {
     return pix;
 }
 void RoundRectItem::setPixmap(const QPixmap &pixmap)
 {
     pix = pixmap;
     update();
 }

 QRectF RoundRectItem::boundingRect() const
 {
     return bounds.adjusted(0, 0, 2, 2);
 }

 void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                           QWidget *widget)
 {
     Q_UNUSED(option);
     Q_UNUSED(widget);
     painter->setPen(Qt::NoPen);
     painter->setBrush(QColor(0, 0, 0, 64));
     painter->drawRoundRect(bounds.translated(2, 2));
     if (fillRect)
         painter->setBrush(QApplication::palette().brush(QPalette::Window));
     else
         painter->setBrush(gradient);
     painter->setPen(QPen(Qt::black, 1));
     painter->drawRoundRect(bounds);
     if (!pix.isNull()) {
         painter->scale(1.95, 1.95);
         painter->drawPixmap(-pix.width() / 2, -pix.height() / 2, pix);
     }
 }

 bool RoundRectItem::fill() const
 {
     return fillRect;
 }
 void RoundRectItem::setFill(bool fill)
 {
     fillRect = fill;
     update();
 }