diff options
Diffstat (limited to 'doc/grab.n')
| -rw-r--r-- | doc/grab.n | 7 |
1 files changed, 4 insertions, 3 deletions
@@ -1,3 +1,4 @@ +'\" -*- nroff -*- '\" '\" Copyright (c) 1992 The Regents of the University of California. '\" Copyright (c) 1994-1996 Sun Microsystems, Inc. @@ -5,7 +6,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: grab.n,v 1.8 2007/12/13 15:23:43 dgp Exp $ +'\" RCS: @(#) $Id: grab.n,v 1.9 2008/06/30 22:57:02 dkf Exp $ '\" .so man.macros .TH grab n "" Tk "Tk Built-In Commands" @@ -18,7 +19,6 @@ grab \- Confine pointer and keyboard events to a window sub-tree .sp \fBgrab \fIoption \fR?\fIarg arg \fR...? .BE - .SH DESCRIPTION .PP This command implements simple pointer and keyboard grabs for Tk. @@ -104,6 +104,7 @@ Returns \fBnone\fR if no grab is currently set on \fIwindow\fR, \fBlocal\fR if a local grab is set on \fIwindow\fR, and \fBglobal\fR if a global grab is set. .SH WARNING +.PP It is very easy to use global grabs to render a display completely unusable (e.g. by setting a grab on a widget which does not respond to events and not providing any mechanism for releasing the grab). Take @@ -123,6 +124,7 @@ only one of those applications can have a local grab for a given display at any given time. If the applications are in different processes, this restriction does not exist. .SH EXAMPLE +.PP Set a grab so that only one button may be clicked out of a group. The other buttons are unresponsive to the mouse until the middle button is clicked. @@ -132,6 +134,5 @@ pack [button .b2 \-text "Click me! #2" \-command {destroy .b2}] pack [button .b3 \-text "Click me! #3" \-command {destroy .b3}] \fBgrab\fR .b2 .CE - .SH KEYWORDS grab, keyboard events, pointer events, window |