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