roundrectitem.cpp Example File

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  #include "roundrectitem.h"

  #include <QApplication>
  #include <QPainter>
  #include <QPalette>

  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();
  }