tearoff.tcl –

This file contains procedures that implement tear-off menus.

RCS: @(#) $Id: tearoff.tcl,v 1.7.4.2 2007/04/29 02:24:49 das Exp $

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.

::tk::TearoffMenu –

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 ::tk::TearOffMenu {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 $w]
if {[tk windowingsystem] eq "aqua"} {
    # Shift by height of tearoff entry minus height of window titlebar
    catch {incr y [expr {[$w yposition 1] - 16}]}
    # Avoid the native menu bar which sits on top of everything.
    if {$y < 22} { set y 22 }
}
}

set parent [winfo parent $w]
while {[winfo toplevel $parent] ne $parent || [winfo class $parent] eq "Menu"} {
set parent [winfo parent $parent]
}
if {$parent eq "."} {
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] ne ""} {
	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 tk::Priv(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 tk::Priv(focus) %W
}

# If there is a -tearoffcommand option for the menu, invoke it
# now.

set cmd [$w cget -tearoffcommand]
if {$cmd ne ""} {
uplevel #0 $cmd [list $w $menu]
}
return $menu

}

::tk::MenuDup –

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 ::tk::MenuDup {src dst type} {
set cmd [list menu $dst -type type] foreach option [src configure] {
if {[llength $option] == 2} {
continue
}
if {[lindex $option 0] eq “-type”} {
continue
}
lappend cmd [lindex $option 0] [lindex $option 4]
}
eval cmd set last [src index last]
if {last eq "none"} { return } for {set i [src cget -tearoff]} {$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.

set tags [bindtags $src]
set srcLen [string length $src]

# Copy tags to x, replacing each substring of src with dst.

while {[set index [string first $src $tags]] != -1} {
append x [string range $tags 0 [expr {$index - 1}]]$dst
set tags [string range $tags [expr {$index + $srcLen}] end]
}
append x $tags

bindtags $dst $x

foreach event [bind $src] {
unset x
set script [bind $src $event]
set eventLen [string length $event]

# Copy script to x, replacing each substring of event with dst.

while {[set index [string first $event $script]] != -1} {
    append x [string range $script 0 [expr {$index - 1}]]
    append x $dst
    set script [string range $script [expr {$index + $eventLen}] end]
}
append x $script

bind $dst $event $x
}

}