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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