XtBuildEventMask() XtBuildEventMask()
Name
XtBuildEventMask - retrieve a widget's event mask.
Synopsis
EventMask XtBuildEventMask(w)
Widget w;
Inputs
w Specifies the widget. Must be of class Core or any subclass thereof.
Returns
An event mask with a bit set for each event type the widget is receiving.
Description
XtBuildEventMask() returns a widget's event mask. The mask reflects the events the widget is currently selecting. (If the widget is unre-
alized, then the mask reflects the events the widget will select when it is realized.) This event mask is the logical OR of all event
masks selected by adding event handlers and event translations (including accelerators). It is updated whenever event handlers or transla-
tions are installed or removed for the specified widget.
Structures
The event_mask is formed by combining the event mask symbols listed in the table below using the bitwise OR operator ( ). Each mask symbol
sets a bit in the event_mask.
NoEventMask Button1MotionMask StructureNotifyMask
KeyPressMask Button2MotionMask ResizeRedirectMask
KeyReleaseMask Button3MotionMask SubstructureNotifyMask
ButtonPressMask Button4MotionMask SubstructureRedirectMask
ButtonReleaseMask Button5MotionMask FocusChangeMask
EnterWindowMask ButtonMotionMask PropertyChangeMask
LeaveWindowMask KeymapStateMask ColormapChangeMask
PointerMotionMask ExposureMask OwnerGrabButtonMask
PointerMotionHintMask VisibilityChangeMask
See Also
XtAddEventHandler(1), XtAddRawEventHandler(1), XtRealizeWidget(1).
Xt - Event Handling XtBuildEventMask()
