XtRegisterDrawable - register a drawable with the Intrinsics event
void XtRegisterDrawable(Display* display, Drawable drawable, Widget
void XtUnregisterDrawable(Display* display, Drawable drawable);
display Specifies the drawable's display.
drawable Specifies the drawable to register.
widget Specifies the widget to register the drawable for.
XtRegisterDrawable associates the specified drawable with the specified
widget so that future calls to XtWindowToWidget with the drawable will
return the widget. The default event dispatcher will dispatch future
core events that arrive with the drawable to the widget as though the
event contained the widget's window, but the event itself will not be
changed in any way when being passed to even handler or action
If the drawable is already registered with another widget, or if the
drawable is the window of a widget in the client's widget tree, the
results of calling XtRegisterDrawable are undefined.
XtUnregisterDrawable removes an association created with
XtRegisterDrawable. If the drawable is the window of a widget in the
client's widget tree the results of calling XtUnregisterDrawable are
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface