void selectedChanged(bool selected) override;
void siblingsInformationChanged(const QBitArray& current, const QBitArray& previous) override;
void editedRoleChanged(const QByteArray& current, const QByteArray& previous) override;
+ void iconSizeChanged(int current, int previous) override;
void resizeEvent(QGraphicsSceneResizeEvent* event) override;
void showEvent(QShowEvent* event) override;
void hideEvent(QHideEvent* event) override;