chip.h Example File

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 #ifndef CHIP_H
 #define CHIP_H

 #include <QtGui/QColor>
 #include <QtWidgets/QGraphicsItem>

 class Chip : public QGraphicsItem
 {
 public:
     Chip(const QColor &color, int x, int y);

     QRectF boundingRect() const;
     QPainterPath shape() const;
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget);

 protected:
     void mousePressEvent(QGraphicsSceneMouseEvent *event);
     void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
     void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

 private:
     int x, y;
     QColor color;
     QVector<QPointF> stuff;
 };

 #endif