In that case, this button can only be toggled off by another button being toggled on. Reimplemented from QWidget. Reimplemented from QWidget. Reimplemented from QWidget. Reimplemented from QWidget.
Handles paint events for buttons.
Reimplemented from QWidget. This signal is emitted when the button is pressed down. This signal is emitted when the button is released. You only need to call this function in order to specify a custom accelerator. This function is obsolete.