The Label widget does not accept any button or key input, and the help callback is the only callback defined.
Label also receives enter and leave events.
Label can contain either text or a pixmap. Label text is a compound string. When a Label is insensitive, its text is stippled, or the user-supplied insensitive pixmap is displayed. Label supports both accelerators and mnemonics primarily for use in Label subclass widgets that are contained in menus. Mnemonics are available in a menu system when the button is visible.