Generated during GDK_SOURCE_TABLET_PAD button presses and releases.
The pad button that was pressed.
the pad group the button belongs to. A GDK_SOURCE_TABLET_PAD device may have one or more groups containing a set of buttons/rings/strips each.
The current mode of group. Different groups in a GDK_SOURCE_TABLET_PAD device may have different current modes.
TRUE if the event was sent explicitly.
the time of the event in milliseconds.
the type of the event (GDK_PAD_BUTTON_PRESS or GDK_PAD_BUTTON_RELEASE).
the window which received the event.