XtAddGrab man page on Ultrix

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XtAddGrab(3Xt)			     X11R5			XtAddGrab(3Xt)

NAME
       XtAddGrab, XtRemoveGrab - redirect user input to a modal widget

SYNTAX
       void XtAddGrab(w, exclusive, spring_loaded)
	     Widget w;
	     Boolean exclusive;
	     Boolean spring_loaded;

       void XtRemoveGrab(w)
	     Widget w;

ARGUMENTS
       exclusive Specifies whether user events should be dispatched exclu‐
		 sively to this widget or also to previous widgets in the cas‐
		 cade.

       spring_loaded
		 Specifies whether this widget was popped up because the user
		 pressed a pointer button.

       w	 Specifies the widget to add to or remove from the modal cas‐
		 cade.

DESCRIPTION
       The function appends the widget (and associated parameters) to the
       modal cascade and checks that exclusive is if spring_loaded is If these
       are not generates an error.

       The modal cascade is used by when it tries to dispatch a user event.
       When at least one modal widget is in the widget cascade, first deter‐
       mines if the event should be delivered.	It starts at the most recent
       cascade entry and follows the cascade up to and including the most
       recent cascade entry added with the exclusive parameter

       This subset of the modal cascade along with all descendants of these
       widgets comprise the active subset.  User events that occur outside the
       widgets in this subset are ignored or remapped.	Modal menus with sub‐
       menus generally add a submenu widget to the cascade with exclusive
       Modal dialog boxes that need to restrict user input to the most deeply
       nested dialog box add a subdialog widget to the cascade with exclusive
       User events that occur within the active subset are delivered to the
       appropriate widget, which is usually a child or further descendant of
       the modal widget.

       Regardless of where on the screen they occur, remap events are always
       delivered to the most recent widget in the active subset of the cascade
       that has spring_loaded if any such widget exists.

       The function removes widgets from the modal cascade starting at the
       most recent widget up to and including the specified widget.  It issues
       an error if the specified widget is not on the modal cascade.

SEE ALSO
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

								XtAddGrab(3Xt)
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