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# tearoff.tcl --
#
# This file contains procedures that implement tear-off menus.
#
# SCCS: @(#) tearoff.tcl 1.20 97/08/21 14:49:27
#
# Copyright (c) 1994 The Regents of the University of California.
# Copyright (c) 1994-1997 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
# tkTearoffMenu --
# Given the name of a menu, this procedure creates a torn-off menu
# that is identical to the given menu (including nested submenus).
# The new torn-off menu exists as a toplevel window managed by the
# window manager. The return value is the name of the new menu.
# The window is created at the point specified by x and y
#
# Arguments:
# w - The menu to be torn-off (duplicated).
# x - x coordinate where window is created
# y - y coordinate where window is created
proc tkTearOffMenu {w {x 0} {y 0}} {
# Find a unique name to use for the torn-off menu. Find the first
# ancestor of w that is a toplevel but not a menu, and use this as
# the parent of the new menu. This guarantees that the torn off
# menu will be on the same screen as the original menu. By making
# it a child of the ancestor, rather than a child of the menu, it
# can continue to live even if the menu is deleted; it will go
# away when the toplevel goes away.
if {$x == 0} {
set x [winfo rootx $w]
}
if {$y == 0} {
set y [winfo rooty $w]
}
set parent [winfo parent $w]
while {([winfo toplevel $parent] != $parent)
|| ([winfo class $parent] == "Menu")} {
set parent [winfo parent $parent]
}
if {$parent == "."} {
set parent ""
}
for {set i 1} 1 {incr i} {
set menu $parent.tearoff$i
if {![winfo exists $menu]} {
break
}
}
$w clone $menu tearoff
# Pick a title for the new menu by looking at the parent of the
# original: if the parent is a menu, then use the text of the active
# entry. If it's a menubutton then use its text.
set parent [winfo parent $w]
if {[$menu cget -title] != ""} {
wm title $menu [$menu cget -title]
} else {
switch [winfo class $parent] {
Menubutton {
wm title $menu [$parent cget -text]
}
Menu {
wm title $menu [$parent entrycget active -label]
}
}
}
$menu post $x $y
if {[winfo exists $menu] == 0} {
return ""
}
# Set tkPriv(focus) on entry: otherwise the focus will get lost
# after keyboard invocation of a sub-menu (it will stay on the
# submenu).
bind $menu <Enter> {
set tkPriv(focus) %W
}
# If there is a -tearoffcommand option for the menu, invoke it
# now.
set cmd [$w cget -tearoffcommand]
if {$cmd != ""} {
uplevel #0 $cmd $w $menu
}
return $menu
}
# tkMenuDup --
# Given a menu (hierarchy), create a duplicate menu (hierarchy)
# in a given window.
#
# Arguments:
# src - Source window. Must be a menu. It and its
# menu descendants will be duplicated at dst.
# dst - Name to use for topmost menu in duplicate
# hierarchy.
proc tkMenuDup {src dst type} {
set cmd [list menu $dst -type $type]
foreach option [$src configure] {
if {[llength $option] == 2} {
continue
}
if {[string compare [lindex $option 0] "-type"] == 0} {
continue
}
lappend cmd [lindex $option 0] [lindex $option 4]
}
eval $cmd
set last [$src index last]
if {$last == "none"} {
return
}
for {set i [$src cget -tearoff]} {$i <= $last} {incr i} {
set cmd [list $dst add [$src type $i]]
foreach option [$src entryconfigure $i] {
lappend cmd [lindex $option 0] [lindex $option 4]
}
eval $cmd
}
# Duplicate the binding tags and bindings from the source menu.
regsub -all . $src {\\&} quotedSrc
regsub -all . $dst {\\&} quotedDst
regsub -all $quotedSrc [bindtags $src] $dst x
bindtags $dst $x
foreach event [bind $src] {
regsub -all $quotedSrc [bind $src $event] $dst x
bind $dst $event $x
}
}
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