# tearoff.tcl --## This file contains procedures that implement tear-off menus.## SCCS: @(#) tearoff.tcl 1.19 97/03/26 15:08:05## 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 createdproc 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 x [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    }}