qt5base-lts/tests/manual/qgraphicsitemgroup/widget.h

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#ifndef WIDGET_H
#define WIDGET_H

#include "customitem.h"

#include <QWidget>
#include <QGraphicsItemGroup>
#include <QPainter>

namespace Ui {
    class Widget;
}

class QGraphicsOpacityEffect;
class QPropertyAnimation;

class Widget : public QWidget
{
    Q_OBJECT
public:
    Widget(QWidget *parent = 0);
    ~Widget();

protected Q_SLOTS:
    void on_rotate_valueChanged(int value);
    void on_scale_valueChanged(int value);
    void on_rotateItem_valueChanged(int value);
    void on_scaleItem_valueChanged(int value);
    void on_group_clicked();
    void on_dismantle_clicked();
    void on_merge_clicked();
    void onSceneSelectionChanged();
    void on_ungroup_clicked();
    void on_buttonGroup_buttonClicked();

private:
    void updateUngroupButton();
    CustomItem * checkedItem() const;

    Ui::Widget *ui;
    CustomScene *scene;
    CustomItem *rectBlue;
    CustomItem *rectRed;
    CustomItem *rectGreen;
    CustomItem *rectYellow;
    QGraphicsOpacityEffect* effect;
    QPropertyAnimation *fadeIn;
    QPropertyAnimation *fadeOut;
    int previousSelectionCount;
};

#endif // WIDGET_H