+++ /dev/null
-'\"
-'\" Copyright (c) 1990 The Regents of the University of California.
-'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\"
-.TH bindtags n 4.0 Tk "Tk Built-In Commands"
-.so man.macros
-.BS
-'\" Note: do not modify the .SH NAME line immediately below!
-.SH NAME
-bindtags \- Determine which bindings apply to a window, and order of evaluation
-.SH SYNOPSIS
-\fBbindtags \fIwindow \fR?\fItagList\fR?
-.BE
-.SH DESCRIPTION
-.PP
-When a binding is created with the \fBbind\fR command, it is
-associated either with a particular window such as \fB.a.b.c\fR,
-a class name such as \fBButton\fR, the keyword \fBall\fR, or any
-other string.
-All of these forms are called \fIbinding tags\fR.
-Each window contains a list of binding tags that determine how
-events are processed for the window.
-When an event occurs in a window, it is applied to each of the
-window's tags in order: for each tag, the most specific binding
-that matches the given tag and event is executed.
-See the \fBbind\fR command for more information on the matching
-process.
-.PP
-By default, each window has four binding tags consisting of the
-name of the window, the window's class name, the name of the window's
-nearest toplevel ancestor, and \fBall\fR, in that order.
-Toplevel windows have only three tags by default, since the toplevel
-name is the same as that of the window.
-The \fBbindtags\fR command allows the binding tags for a window to be
-read and modified.
-.PP
-If \fBbindtags\fR is invoked with only one argument, then the
-current set of binding tags for \fIwindow\fR is returned as a list.
-If the \fItagList\fR argument is specified to \fBbindtags\fR,
-then it must be a proper list; the tags for \fIwindow\fR are changed
-to the elements of the list.
-The elements of \fItagList\fR may be arbitrary strings; however,
-any tag starting with a dot is treated as the name of a window; if
-no window by that name exists at the time an event is processed,
-then the tag is ignored for that event.
-The order of the elements in \fItagList\fR determines the order in
-which binding scripts are executed in response to events.
-For example, the command
-.CS
-\fBbindtags .b {all . Button .b}\fR
-.CE
-reverses the order in which binding scripts will be evaluated for
-a button named \fB.b\fR so that \fBall\fR bindings are invoked
-first, following by bindings for \fB.b\fR's toplevel
-.PQ . "" ,
-followed by class bindings, followed by bindings for \fB.b\fR.
-If \fItagList\fR is an empty list then the binding tags for \fIwindow\fR
-are returned to the default state described above.
-.PP
-The \fBbindtags\fR command may be used to introduce arbitrary
-additional binding tags for a window, or to remove standard tags.
-For example, the command
-.CS
-\fBbindtags .b {.b TrickyButton . all}\fR
-.CE
-replaces the \fBButton\fR tag for \fB.b\fR with \fBTrickyButton\fR.
-This means that the default widget bindings for buttons, which are
-associated with the \fBButton\fR tag, will no longer apply to \fB.b\fR,
-but any bindings associated with \fBTrickyButton\fR (perhaps some
-new button behavior) will apply.
-.SH EXAMPLE
-.PP
-If you have a set of nested \fBframe\fR widgets and you want events
-sent to a \fBbutton\fR widget to also be delivered to all the widgets
-up to the current \fBtoplevel\fR (in contrast to Tk's default
-behavior, where events are not delivered to those intermediate
-windows) to make it easier to have accelerators that are only active
-for part of a window, you could use a helper procedure like this to
-help set things up:
-.CS
-proc setupBindtagsForTreeDelivery {widget} {
- set tags [list $widget [winfo class $widget]]
- set w $widget
- set t [winfo toplevel $w]
- while {$w ne $t} {
- set w [winfo parent $w]
- lappend tags $w
- }
- lappend tags all
- \fBbindtags\fR $widget $tags
-}
-.CE
-.SH "SEE ALSO"
-bind(n)
-.SH KEYWORDS
-binding, event, tag
-'\" Local Variables:
-'\" mode: nroff
-'\" End:
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