Reimplemented in QToolButton, QCheckBox, QRadioButton and QPushButton. Reimplemented from QWidget. Handles focus in events for the button. Reimplemented from QWidget. Reimplemented from QWidget.
Handles focus out events for the button.
Reimplemented from QWidget. This virtual function is reimplemented by subclasses. Reimplemented in QRadioButton. In that case, this button can only be toggled off by another buton beinhg toggled on. Handles keyboard events for the button.