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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