XmTrackingEvent - A Toolkit function that provides a modal interaction
Widget XmTrackingEvent (widget, cursor, confine_to, event_return)
XmTrackingEvent provides a modal interface
for selection of a component. It is intended to support context help. The
function grabs the pointer and discards succeeding events until BSelect is released or a key is pressed and then released. The function
then returns the widget or gadget that contains the pointer when BSelect is released or a key is released.
Specifies the widget ID of a widget to use as the basis of
the modal interaction. That is, the widget within which the interaction must
occur, usually a top level shell.
Specifies the cursor to be used for the pointer during the
interaction. This is a standard X cursor name.
Specifies whether or not the cursor should be confined to widget.
Returns the ButtonRelease or KeyRelease event that causes
the function to return.
Returns the widget or gadget that contains the pointer when BSelect is released or a key is released. If no widget or gadget
contains the pointer, the function returns NULL.