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sortingbox.h Example File
widgets/tooltips/sortingbox.h

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 #ifndef SORTINGBOX_H
 #define SORTINGBOX_H

 #include <QWidget>

 #include "shapeitem.h"

 class QAction;
 class QPoint;
 class QToolButton;

 class SortingBox : public QWidget
 {
     Q_OBJECT

 public:
     SortingBox();

 protected:
     bool event(QEvent *event);
     void resizeEvent(QResizeEvent *event);
     void paintEvent(QPaintEvent *event);
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);

 private slots:
     void createNewCircle();
     void createNewSquare();
     void createNewTriangle();

 private:
     int updateButtonGeometry(QToolButton *button, int x, int y);
     void createShapeItem(const QPainterPath &path, const QString &toolTip,
                          const QPoint &pos, const QColor &color);
     int itemAt(const QPoint &pos);
     void moveItemTo(const QPoint &pos);
     QPoint initialItemPosition(const QPainterPath &path);
     QPoint randomItemPosition();
     QColor initialItemColor();
     QColor randomItemColor();
     QToolButton *createToolButton(const QString &toolTip, const QIcon &icon,
                                   const char *member);

     QList<ShapeItem> shapeItems;
     QPainterPath circlePath;
     QPainterPath squarePath;
     QPainterPath trianglePath;

     QPoint previousPosition;
     ShapeItem *itemInMotion;

     QToolButton *newCircleButton;
     QToolButton *newSquareButton;
     QToolButton *newTriangleButton;
 };

 #endif