3 # This file defines the default bindings for Tk menus and menubuttons.
4 # It also implements keyboard traversal of menus and implements a few
5 # other utility procedures related to menus.
7 # RCS: @(#) $Id: menu.tcl,v 1.18 2002/08/31 06:12:28 das Exp $
9 # Copyright (c) 1992-1994 The Regents of the University of California.
10 # Copyright (c) 1994-1997 Sun Microsystems, Inc.
11 # Copyright (c) 1998-1999 by Scriptics Corporation.
13 # See the file "license.terms" for information on usage and redistribution
14 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
17 #-------------------------------------------------------------------------
18 # Elements of tk::Priv that are used in this file:
20 # cursor - Saves the -cursor option for the posted menubutton.
21 # focus - Saves the focus during a menu selection operation.
22 # Focus gets restored here when the menu is unposted.
23 # grabGlobal - Used in conjunction with tk::Priv(oldGrab): if
24 # tk::Priv(oldGrab) is non-empty, then tk::Priv(grabGlobal)
25 # contains either an empty string or "-global" to
26 # indicate whether the old grab was a local one or
28 # inMenubutton - The name of the menubutton widget containing
29 # the mouse, or an empty string if the mouse is
30 # not over any menubutton.
31 # menuBar - The name of the menubar that is the root
32 # of the cascade hierarchy which is currently
33 # posted. This is null when there is no menu currently
34 # being pulled down from a menu bar.
35 # oldGrab - Window that had the grab before a menu was posted.
36 # Used to restore the grab state after the menu
37 # is unposted. Empty string means there was no
38 # grab previously set.
39 # popup - If a menu has been popped up via tk_popup, this
40 # gives the name of the menu. Otherwise this
42 # postedMb - Name of the menubutton whose menu is currently
43 # posted, or an empty string if nothing is posted
44 # A grab is set on this widget.
45 # relief - Used to save the original relief of the current
47 # window - When the mouse is over a menu, this holds the
48 # name of the menu; it's cleared when the mouse
50 # tearoff - Whether the last menu posted was a tearoff or not.
51 # This is true always for unix, for tearoffs for Mac
53 # activeMenu - This is the last active menu for use
54 # with the <<MenuSelect>> virtual event.
55 # activeItem - This is the last active menu item for
56 # use with the <<MenuSelect>> virtual event.
57 #-------------------------------------------------------------------------
59 #-------------------------------------------------------------------------
61 # This file is tricky because there are five different ways that menus
64 # 1. As a pulldown from a menubutton. In this style, the variable
65 # tk::Priv(postedMb) identifies the posted menubutton.
66 # 2. As a torn-off menu copied from some other menu. In this style
67 # tk::Priv(postedMb) is empty, and menu's type is "tearoff".
68 # 3. As an option menu, triggered from an option menubutton. In this
69 # style tk::Priv(postedMb) identifies the posted menubutton.
70 # 4. As a popup menu. In this style tk::Priv(postedMb) is empty and
71 # the top-level menu's type is "normal".
72 # 5. As a pulldown from a menubar. The variable tk::Priv(menubar) has
73 # the owning menubar, and the menu itself is of type "normal".
75 # The various binding procedures use the state described above to
76 # distinguish the various cases and take different actions in each
78 #-------------------------------------------------------------------------
80 #-------------------------------------------------------------------------
81 # The code below creates the default class bindings for menus
83 #-------------------------------------------------------------------------
85 bind Menubutton <FocusIn> {}
86 bind Menubutton <Enter> {
89 bind Menubutton <Leave> {
93 if {$tk::Priv(inMenubutton) ne ""} {
94 tk::MbPost $tk::Priv(inMenubutton) %X %Y
97 bind Menubutton <Motion> {
98 tk::MbMotion %W up %X %Y
100 bind Menubutton <B1-Motion> {
101 tk::MbMotion %W down %X %Y
103 bind Menubutton <ButtonRelease-1> {
106 bind Menubutton <space> {
108 tk::MenuFirstEntry [%W cget -menu]
111 # Must set focus when mouse enters a menu, in order to allow
112 # mixed-mode processing using both the mouse and the keyboard.
113 # Don't set the focus if the event comes from a grab release,
114 # though: such an event can happen after as part of unposting
115 # a cascaded chain of menus, after the focus has already been
116 # restored to wherever it was before menu selection started.
118 bind Menu <FocusIn> {}
121 set tk::Priv(window) %W
122 if {[%W cget -type] eq "tearoff"} {
123 if {"%m" ne "NotifyUngrab"} {
124 if {[tk windowingsystem] eq "x11"} {
129 tk::MenuMotion %W %x %y %s
133 tk::MenuLeave %W %X %Y %s
136 tk::MenuMotion %W %x %y %s
138 bind Menu <ButtonPress> {
139 tk::MenuButtonDown %W
141 bind Menu <ButtonRelease> {
157 tk::MenuRightArrow %W
165 bind Menu <KeyPress> {
166 tk::TraverseWithinMenu %W %A
169 # The following bindings apply to all windows, and are used to
170 # implement keyboard menu traversal.
172 if {[string equal [tk windowingsystem] "x11"]} {
173 bind all <Alt-KeyPress> {
174 tk::TraverseToMenu %W %A
181 bind Menubutton <Alt-KeyPress> {
182 tk::TraverseToMenu %W %A
185 bind Menubutton <F10> {
191 # This procedure is invoked when the mouse enters a menubutton
192 # widget. It activates the widget unless it is disabled. Note:
193 # this procedure is only invoked when mouse button 1 is *not* down.
194 # The procedure ::tk::MbB1Enter is invoked if the button is down.
197 # w - The name of the widget.
199 proc ::tk::MbEnter w {
202 if {[string compare $Priv(inMenubutton) ""]} {
203 MbLeave $Priv(inMenubutton)
205 set Priv(inMenubutton) $w
206 if {[string compare [$w cget -state] "disabled"]} {
207 $w configure -state active
212 # This procedure is invoked when the mouse leaves a menubutton widget.
213 # It de-activates the widget, if the widget still exists.
216 # w - The name of the widget.
218 proc ::tk::MbLeave w {
221 set Priv(inMenubutton) {}
222 if {![winfo exists $w]} {
225 if {[string equal [$w cget -state] "active"]} {
226 $w configure -state normal
231 # Given a menubutton, this procedure does all the work of posting
232 # its associated menu and unposting any other menu that is currently
236 # w - The name of the menubutton widget whose menu
238 # x, y - Root coordinates of cursor, used for positioning
239 # option menus. If not specified, then the center
240 # of the menubutton is used for an option menu.
242 proc ::tk::MbPost {w {x {}} {y {}}} {
247 if {[$w cget -state] eq "disabled" || $w eq $Priv(postedMb)} {
250 set menu [$w cget -menu]
251 if {[string equal $menu ""]} {
254 set tearoff [expr {[tk windowingsystem] eq "x11" \
255 || [$menu cget -type] eq "tearoff"}]
256 if {[string first $w $menu] != 0} {
257 error "can't post $menu: it isn't a descendant of $w (this is a new requirement in Tk versions 3.0 and later)"
259 set cur $Priv(postedMb)
260 if {[string compare $cur ""]} {
263 set Priv(cursor) [$w cget -cursor]
264 set Priv(relief) [$w cget -relief]
265 $w configure -cursor arrow
266 $w configure -relief raised
268 set Priv(postedMb) $w
269 set Priv(focus) [focus]
271 GenerateMenuSelect $menu
273 # If this looks like an option menubutton then post the menu so
274 # that the current entry is on top of the mouse. Otherwise post
275 # the menu just below the menubutton, as for a pull-down.
279 switch [$w cget -direction] {
281 set x [winfo rootx $w]
282 set y [expr {[winfo rooty $w] - [winfo reqheight $menu]}]
283 PostOverPoint $menu $x $y
286 set x [winfo rootx $w]
287 set y [expr {[winfo rooty $w] + [winfo height $w]}]
288 PostOverPoint $menu $x $y
291 set x [expr {[winfo rootx $w] - [winfo reqwidth $menu]}]
292 set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}]
293 set entry [MenuFindName $menu [$w cget -text]]
294 if {[$w cget -indicatoron]} {
295 if {$entry == [$menu index last]} {
296 incr y [expr {-([$menu yposition $entry] \
297 + [winfo reqheight $menu])/2}]
299 incr y [expr {-([$menu yposition $entry] \
300 + [$menu yposition [expr {$entry+1}]])/2}]
303 PostOverPoint $menu $x $y
305 && [$menu entrycget $entry -state] ne "disabled"} {
306 $menu activate $entry
307 GenerateMenuSelect $menu
311 set x [expr {[winfo rootx $w] + [winfo width $w]}]
312 set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}]
313 set entry [MenuFindName $menu [$w cget -text]]
314 if {[$w cget -indicatoron]} {
315 if {$entry == [$menu index last]} {
316 incr y [expr {-([$menu yposition $entry] \
317 + [winfo reqheight $menu])/2}]
319 incr y [expr {-([$menu yposition $entry] \
320 + [$menu yposition [expr {$entry+1}]])/2}]
323 PostOverPoint $menu $x $y
325 && [$menu entrycget $entry -state] ne "disabled"} {
326 $menu activate $entry
327 GenerateMenuSelect $menu
331 if {[$w cget -indicatoron]} {
332 if {[string equal $y {}]} {
333 set x [expr {[winfo rootx $w] + [winfo width $w]/2}]
334 set y [expr {[winfo rooty $w] + [winfo height $w]/2}]
336 PostOverPoint $menu $x $y [MenuFindName $menu [$w cget -text]]
338 PostOverPoint $menu [winfo rootx $w] [expr {[winfo rooty $w]+[winfo height $w]}]
343 # Error posting menu (e.g. bogus -postcommand). Unpost it and
346 set savedInfo $errorInfo
348 error $msg $savedInfo
352 set Priv(tearoff) $tearoff
355 if {[winfo viewable $w]} {
362 # ::tk::MenuUnpost --
363 # This procedure unposts a given menu, plus all of its ancestors up
364 # to (and including) a menubutton, if any. It also restores various
365 # values to what they were before the menu was posted, and releases
366 # a grab if there's a menubutton involved. Special notes:
367 # 1. It's important to unpost all menus before releasing the grab, so
368 # that any Enter-Leave events (e.g. from menu back to main
369 # application) have mode NotifyGrab.
370 # 2. Be sure to enclose various groups of commands in "catch" so that
371 # the procedure will complete even if the menubutton or the menu
372 # or the grab window has been deleted.
375 # menu - Name of a menu to unpost. Ignored if there
376 # is a posted menubutton.
378 proc ::tk::MenuUnpost menu {
381 set mb $Priv(postedMb)
383 # Restore focus right away (otherwise X will take focus away when
384 # the menu is unmapped and under some window managers (e.g. olvwm)
385 # we'll lose the focus completely).
387 catch {focus $Priv(focus)}
390 # Unpost menu(s) and restore some stuff that's dependent on
394 if {[string compare $mb ""]} {
395 set menu [$mb cget -menu]
397 set Priv(postedMb) {}
398 $mb configure -cursor $Priv(cursor)
399 $mb configure -relief $Priv(relief)
400 } elseif {[string compare $Priv(popup) ""]} {
403 } elseif {[string compare [$menu cget -type] "menubar"] \
404 && [string compare [$menu cget -type] "tearoff"]} {
405 # We're in a cascaded sub-menu from a torn-off menu or popup.
406 # Unpost all the menus up to the toplevel one (but not
407 # including the top-level torn-off one) and deactivate the
408 # top-level torn off menu if there is one.
411 set parent [winfo parent $menu]
412 if {[string compare [winfo class $parent] "Menu"] \
413 || ![winfo ismapped $parent]} {
416 $parent activate none
417 $parent postcascade none
418 GenerateMenuSelect $parent
419 set type [$parent cget -type]
420 if {[string equal $type "menubar"] || \
421 [string equal $type "tearoff"]} {
426 if {[string compare [$menu cget -type] "menubar"]} {
432 if {($Priv(tearoff) != 0) || $Priv(menuBar) ne ""} {
433 # Release grab, if any, and restore the previous grab, if there
435 if {[string compare $menu ""]} {
436 set grab [grab current $menu]
437 if {[string compare $grab ""]} {
442 if {$Priv(menuBar) ne ""} {
443 $Priv(menuBar) configure -cursor $Priv(cursor)
446 if {[tk windowingsystem] ne "x11"} {
453 # This procedure handles mouse motion events inside menubuttons, and
454 # also outside menubuttons when a menubutton has a grab (e.g. when a
455 # menu selection operation is in progress).
458 # w - The name of the menubutton widget.
459 # upDown - "down" means button 1 is pressed, "up" means
461 # rootx, rooty - Coordinates of mouse, in (virtual?) root window.
463 proc ::tk::MbMotion {w upDown rootx rooty} {
466 if {[string equal $Priv(inMenubutton) $w]} {
469 set new [winfo containing $rootx $rooty]
470 if {[string compare $new $Priv(inMenubutton)] \
471 && ([string equal $new ""] \
472 || [string equal [winfo toplevel $new] [winfo toplevel $w]])} {
473 if {[string compare $Priv(inMenubutton) ""]} {
474 MbLeave $Priv(inMenubutton)
476 if {[string compare $new ""] \
477 && [string equal [winfo class $new] "Menubutton"] \
478 && ([$new cget -indicatoron] == 0) \
479 && ([$w cget -indicatoron] == 0)} {
480 if {[string equal $upDown "down"]} {
481 MbPost $new $rootx $rooty
489 # ::tk::MbButtonUp --
490 # This procedure is invoked to handle button 1 releases for menubuttons.
491 # If the release happens inside the menubutton then leave its menu
492 # posted with element 0 activated. Otherwise, unpost the menu.
495 # w - The name of the menubutton widget.
497 proc ::tk::MbButtonUp w {
501 set menu [$w cget -menu]
502 set tearoff [expr {[tk windowingsystem] eq "x11" || \
503 ($menu ne "" && [$menu cget -type] eq "tearoff")}]
504 if {($tearoff != 0) && $Priv(postedMb) eq $w \
505 && $Priv(inMenubutton) eq $w} {
506 MenuFirstEntry [$Priv(postedMb) cget -menu]
512 # ::tk::MenuMotion --
513 # This procedure is called to handle mouse motion events for menus.
514 # It does two things. First, it resets the active element in the
515 # menu, if the mouse is over the menu. Second, if a mouse button
516 # is down, it posts and unposts cascade entries to match the mouse
520 # menu - The menu window.
521 # x - The x position of the mouse.
522 # y - The y position of the mouse.
523 # state - Modifier state (tells whether buttons are down).
525 proc ::tk::MenuMotion {menu x y state} {
527 if {[string equal $menu $Priv(window)]} {
528 if {[string equal [$menu cget -type] "menubar"]} {
529 if {[info exists Priv(focus)] && \
530 [string compare $menu $Priv(focus)]} {
531 $menu activate @$x,$y
532 GenerateMenuSelect $menu
535 $menu activate @$x,$y
536 GenerateMenuSelect $menu
539 if {($state & 0x1f00) != 0} {
540 $menu postcascade active
544 # ::tk::MenuButtonDown --
545 # Handles button presses in menus. There are a couple of tricky things
547 # 1. Change the posted cascade entry (if any) to match the mouse position.
548 # 2. If there is a posted menubutton, must grab to the menubutton; this
549 # overrrides the implicit grab on button press, so that the menu
550 # button can track mouse motions over other menubuttons and change
552 # 3. If there's no posted menubutton (e.g. because we're a torn-off menu
553 # or one of its descendants) must grab to the top-level menu so that
554 # we can track mouse motions across the entire menu hierarchy.
557 # menu - The menu window.
559 proc ::tk::MenuButtonDown menu {
563 if {![winfo viewable $menu]} {
566 $menu postcascade active
567 if {[string compare $Priv(postedMb) ""] && \
568 [winfo viewable $Priv(postedMb)]} {
569 grab -global $Priv(postedMb)
571 while {[string equal [$menu cget -type] "normal"] \
572 && [string equal [winfo class [winfo parent $menu]] "Menu"] \
573 && [winfo ismapped [winfo parent $menu]]} {
574 set menu [winfo parent $menu]
577 if {[string equal $Priv(menuBar) {}]} {
578 set Priv(menuBar) $menu
579 set Priv(cursor) [$menu cget -cursor]
580 $menu configure -cursor arrow
583 # Don't update grab information if the grab window isn't changing.
584 # Otherwise, we'll get an error when we unpost the menus and
585 # restore the grab, since the old grab window will not be viewable
588 if {[string compare $menu [grab current $menu]]} {
592 # Must re-grab even if the grab window hasn't changed, in order
593 # to release the implicit grab from the button press.
595 if {[string equal [tk windowingsystem] "x11"]} {
602 # This procedure is invoked to handle Leave events for a menu. It
603 # deactivates everything unless the active element is a cascade element
604 # and the mouse is now over the submenu.
607 # menu - The menu window.
608 # rootx, rooty - Root coordinates of mouse.
609 # state - Modifier state.
611 proc ::tk::MenuLeave {menu rootx rooty state} {
614 if {[string equal [$menu index active] "none"]} {
617 if {[string equal [$menu type active] "cascade"]
618 && [string equal [winfo containing $rootx $rooty] \
619 [$menu entrycget active -menu]]} {
623 GenerateMenuSelect $menu
626 # ::tk::MenuInvoke --
627 # This procedure is invoked when button 1 is released over a menu.
628 # It invokes the appropriate menu action and unposts the menu if
629 # it came from a menubutton.
632 # w - Name of the menu widget.
633 # buttonRelease - 1 means this procedure is called because of
634 # a button release; 0 means because of keystroke.
636 proc ::tk::MenuInvoke {w buttonRelease} {
639 if {$buttonRelease && [string equal $Priv(window) {}]} {
640 # Mouse was pressed over a menu without a menu button, then
641 # dragged off the menu (possibly with a cascade posted) and
642 # released. Unpost everything and quit.
646 event generate $w <<MenuSelect>>
650 if {[string equal [$w type active] "cascade"]} {
651 $w postcascade active
652 set menu [$w entrycget active -menu]
654 } elseif {[string equal [$w type active] "tearoff"]} {
657 } elseif {[string equal [$w cget -type] "menubar"]} {
659 set active [$w index active]
660 set isCascade [string equal [$w type $active] "cascade"]
662 # Only de-activate the active item if it's a cascade; this prevents
663 # the annoying "activation flicker" you otherwise get with
664 # checkbuttons/commands/etc. on menubars
668 event generate $w <<MenuSelect>>
673 # If the active item is not a cascade, invoke it. This enables
674 # the use of checkbuttons/commands/etc. on menubars (which is legal,
675 # but not recommended)
678 uplevel #0 [list $w invoke $active]
682 uplevel #0 [list $w invoke active]
686 # ::tk::MenuEscape --
687 # This procedure is invoked for the Cancel (or Escape) key. It unposts
688 # the given menu and, if it is the top-level menu for a menu button,
689 # unposts the menu button as well.
692 # menu - Name of the menu window.
694 proc ::tk::MenuEscape menu {
695 set parent [winfo parent $menu]
696 if {[string compare [winfo class $parent] "Menu"]} {
698 } elseif {[string equal [$parent cget -type] "menubar"]} {
702 MenuNextMenu $menu left
706 # The following routines handle arrow keys. Arrow keys behave
707 # differently depending on whether the menu is a menu bar or not.
709 proc ::tk::MenuUpArrow {menu} {
710 if {[string equal [$menu cget -type] "menubar"]} {
711 MenuNextMenu $menu left
713 MenuNextEntry $menu -1
717 proc ::tk::MenuDownArrow {menu} {
718 if {[string equal [$menu cget -type] "menubar"]} {
719 MenuNextMenu $menu right
721 MenuNextEntry $menu 1
725 proc ::tk::MenuLeftArrow {menu} {
726 if {[string equal [$menu cget -type] "menubar"]} {
727 MenuNextEntry $menu -1
729 MenuNextMenu $menu left
733 proc ::tk::MenuRightArrow {menu} {
734 if {[string equal [$menu cget -type] "menubar"]} {
735 MenuNextEntry $menu 1
737 MenuNextMenu $menu right
741 # ::tk::MenuNextMenu --
742 # This procedure is invoked to handle "left" and "right" traversal
743 # motions in menus. It traverses to the next menu in a menu bar,
744 # or into or out of a cascaded menu.
747 # menu - The menu that received the keyboard
749 # direction - Direction in which to move: "left" or "right"
751 proc ::tk::MenuNextMenu {menu direction} {
754 # First handle traversals into and out of cascaded menus.
756 if {[string equal $direction "right"]} {
758 set parent [winfo parent $menu]
759 set class [winfo class $parent]
760 if {[string equal [$menu type active] "cascade"]} {
761 $menu postcascade active
762 set m2 [$menu entrycget active -menu]
763 if {[string compare $m2 ""]} {
768 set parent [winfo parent $menu]
769 while {[string compare $parent "."]} {
770 if {[string equal [winfo class $parent] "Menu"] \
771 && [string equal [$parent cget -type] "menubar"]} {
772 tk_menuSetFocus $parent
773 MenuNextEntry $parent 1
776 set parent [winfo parent $parent]
781 set m2 [winfo parent $menu]
782 if {[string equal [winfo class $m2] "Menu"]} {
784 GenerateMenuSelect $menu
789 if {[string compare [$m2 cget -type] "menubar"]} {
795 # Can't traverse into or out of a cascaded menu. Go to the next
796 # or previous menubutton, if that makes sense.
798 set m2 [winfo parent $menu]
799 if {[string equal [winfo class $m2] "Menu"]} {
800 if {[string equal [$m2 cget -type] "menubar"]} {
807 set w $Priv(postedMb)
808 if {[string equal $w ""]} {
811 set buttons [winfo children [winfo parent $w]]
812 set length [llength $buttons]
813 set i [expr {[lsearch -exact $buttons $w] + $count}]
818 while {$i >= $length} {
821 set mb [lindex $buttons $i]
822 if {[string equal [winfo class $mb] "Menubutton"] \
823 && [string compare [$mb cget -state] "disabled"] \
824 && [string compare [$mb cget -menu] ""] \
825 && [string compare [[$mb cget -menu] index last] "none"]} {
828 if {[string equal $mb $w]} {
834 MenuFirstEntry [$mb cget -menu]
837 # ::tk::MenuNextEntry --
838 # Activate the next higher or lower entry in the posted menu,
839 # wrapping around at the ends. Disabled entries are skipped.
842 # menu - Menu window that received the keystroke.
843 # count - 1 means go to the next lower entry,
844 # -1 means go to the next higher entry.
846 proc ::tk::MenuNextEntry {menu count} {
848 if {[string equal [$menu index last] "none"]} {
851 set length [expr {[$menu index last]+1}]
852 set quitAfter $length
853 set active [$menu index active]
854 if {[string equal $active "none"]} {
857 set i [expr {$active + $count}]
860 if {$quitAfter <= 0} {
861 # We've tried every entry in the menu. Either there are
862 # none, or they're all disabled. Just give up.
869 while {$i >= $length} {
872 if {[catch {$menu entrycget $i -state} state] == 0} {
873 if {$state ne "disabled" && \
874 ($i!=0 || [$menu cget -type] ne "tearoff" \
875 || [$menu type 0] ne "tearoff")} {
886 GenerateMenuSelect $menu
888 if {[string equal [$menu type $i] "cascade"] \
889 && [string equal [$menu cget -type] "menubar"]} {
890 set cascade [$menu entrycget $i -menu]
891 if {[string compare $cascade ""]} {
892 # Here we auto-post a cascade. This is necessary when
893 # we traverse left/right in the menubar, but undesirable when
894 # we traverse up/down in a menu.
896 MenuFirstEntry $cascade
902 # This procedure searches the entire window hierarchy under w for
903 # a menubutton that isn't disabled and whose underlined character
904 # is "char" or an entry in a menubar that isn't disabled and whose
905 # underlined character is "char".
906 # It returns the name of that window, if found, or an
907 # empty string if no matching window was found. If "char" is an
908 # empty string then the procedure returns the name of the first
909 # menubutton found that isn't disabled.
912 # w - Name of window where key was typed.
913 # char - Underlined character to search for;
914 # may be either upper or lower case, and
915 # will match either upper or lower case.
917 proc ::tk::MenuFind {w char} {
918 set char [string tolower $char]
919 set windowlist [winfo child $w]
921 foreach child $windowlist {
922 # Don't descend into other toplevels.
923 if {[string compare [winfo toplevel $w] [winfo toplevel $child]]} {
926 if {[string equal [winfo class $child] "Menu"] && \
927 [string equal [$child cget -type] "menubar"]} {
928 if {[string equal $char ""]} {
931 set last [$child index last]
932 for {set i [$child cget -tearoff]} {$i <= $last} {incr i} {
933 if {[string equal [$child type $i] "separator"]} {
936 set char2 [string index [$child entrycget $i -label] \
937 [$child entrycget $i -underline]]
938 if {[string equal $char [string tolower $char2]] \
939 || [string equal $char ""]} {
940 if {[string compare [$child entrycget $i -state] "disabled"]} {
948 foreach child $windowlist {
949 # Don't descend into other toplevels.
950 if {[string compare [winfo toplevel $w] [winfo toplevel $child]]} {
953 switch [winfo class $child] {
955 set char2 [string index [$child cget -text] \
956 [$child cget -underline]]
957 if {[string equal $char [string tolower $char2]] \
958 || [string equal $char ""]} {
959 if {[string compare [$child cget -state] "disabled"]} {
966 set match [MenuFind $child $char]
967 if {[string compare $match ""]} {
976 # ::tk::TraverseToMenu --
977 # This procedure implements keyboard traversal of menus. Given an
978 # ASCII character "char", it looks for a menubutton with that character
979 # underlined. If one is found, it posts the menubutton's menu
982 # w - Window in which the key was typed (selects
983 # a toplevel window).
984 # char - Character that selects a menu. The case
985 # is ignored. If an empty string, nothing
988 proc ::tk::TraverseToMenu {w char} {
990 if {[string equal $char ""]} {
993 while {[string equal [winfo class $w] "Menu"]} {
994 if {[string compare [$w cget -type] "menubar"] \
995 && [string equal $Priv(postedMb) ""]} {
998 if {[string equal [$w cget -type] "menubar"]} {
1001 set w [winfo parent $w]
1003 set w [MenuFind [winfo toplevel $w] $char]
1004 if {[string compare $w ""]} {
1005 if {[string equal [winfo class $w] "Menu"]} {
1010 TraverseWithinMenu $w $char
1013 MenuFirstEntry [$w cget -menu]
1018 # ::tk::FirstMenu --
1019 # This procedure traverses to the first menubutton in the toplevel
1020 # for a given window, and posts that menubutton's menu.
1023 # w - Name of a window. Selects which toplevel
1024 # to search for menubuttons.
1026 proc ::tk::FirstMenu w {
1028 set w [MenuFind [winfo toplevel $w] ""]
1029 if {[string compare $w ""]} {
1030 if {[string equal [winfo class $w] "Menu"]} {
1038 MenuFirstEntry [$w cget -menu]
1043 # ::tk::TraverseWithinMenu
1044 # This procedure implements keyboard traversal within a menu. It
1045 # searches for an entry in the menu that has "char" underlined. If
1046 # such an entry is found, it is invoked and the menu is unposted.
1049 # w - The name of the menu widget.
1050 # char - The character to look for; case is
1051 # ignored. If the string is empty then
1054 proc ::tk::TraverseWithinMenu {w char} {
1055 if {[string equal $char ""]} {
1058 set char [string tolower $char]
1059 set last [$w index last]
1060 if {[string equal $last "none"]} {
1063 for {set i 0} {$i <= $last} {incr i} {
1064 if {[catch {set char2 [string index \
1065 [$w entrycget $i -label] [$w entrycget $i -underline]]}]} {
1068 if {[string equal $char [string tolower $char2]]} {
1069 if {[string equal [$w type $i] "cascade"]} {
1071 $w postcascade active
1072 event generate $w <<MenuSelect>>
1073 set m2 [$w entrycget $i -menu]
1074 if {[string compare $m2 ""]} {
1079 uplevel #0 [list $w invoke $i]
1086 # ::tk::MenuFirstEntry --
1087 # Given a menu, this procedure finds the first entry that isn't
1088 # disabled or a tear-off or separator, and activates that entry.
1089 # However, if there is already an active entry in the menu (e.g.,
1090 # because of a previous call to tk::PostOverPoint) then the active
1091 # entry isn't changed. This procedure also sets the input focus
1095 # menu - Name of the menu window (possibly empty).
1097 proc ::tk::MenuFirstEntry menu {
1098 if {[string equal $menu ""]} {
1101 tk_menuSetFocus $menu
1102 if {[string compare [$menu index active] "none"]} {
1105 set last [$menu index last]
1106 if {[string equal $last "none"]} {
1109 for {set i 0} {$i <= $last} {incr i} {
1110 if {([catch {set state [$menu entrycget $i -state]}] == 0) \
1111 && [string compare $state "disabled"] \
1112 && [string compare [$menu type $i] "tearoff"]} {
1114 GenerateMenuSelect $menu
1115 # Only post the cascade if the current menu is a menubar;
1116 # otherwise, if the first entry of the cascade is a cascade,
1117 # we can get an annoying cascading effect resulting in a bunch of
1118 # menus getting posted (bug 676)
1119 if {[string equal [$menu type $i] "cascade"] && \
1120 [string equal [$menu cget -type] "menubar"]} {
1121 set cascade [$menu entrycget $i -menu]
1122 if {[string compare $cascade ""]} {
1123 $menu postcascade $i
1124 MenuFirstEntry $cascade
1132 # ::tk::MenuFindName --
1133 # Given a menu and a text string, return the index of the menu entry
1134 # that displays the string as its label. If there is no such entry,
1135 # return an empty string. This procedure is tricky because some names
1136 # like "active" have a special meaning in menu commands, so we can't
1137 # always use the "index" widget command.
1140 # menu - Name of the menu widget.
1141 # s - String to look for.
1143 proc ::tk::MenuFindName {menu s} {
1145 if {![regexp {^active$|^last$|^none$|^[0-9]|^@} $s]} {
1146 catch {set i [$menu index $s]}
1149 set last [$menu index last]
1150 if {[string equal $last "none"]} {
1153 for {set i 0} {$i <= $last} {incr i} {
1154 if {![catch {$menu entrycget $i -label} label]} {
1155 if {[string equal $label $s]} {
1163 # ::tk::PostOverPoint --
1164 # This procedure posts a given menu such that a given entry in the
1165 # menu is centered over a given point in the root window. It also
1166 # activates the given entry.
1169 # menu - Menu to post.
1170 # x, y - Root coordinates of point.
1171 # entry - Index of entry within menu to center over (x,y).
1172 # If omitted or specified as {}, then the menu's
1173 # upper-left corner goes at (x,y).
1175 proc ::tk::PostOverPoint {menu x y {entry {}}} {
1178 if {[string compare $entry {}]} {
1179 if {$entry == [$menu index last]} {
1180 incr y [expr {-([$menu yposition $entry] \
1181 + [winfo reqheight $menu])/2}]
1183 incr y [expr {-([$menu yposition $entry] \
1184 + [$menu yposition [expr {$entry+1}]])/2}]
1186 incr x [expr {-[winfo reqwidth $menu]/2}]
1188 if {$tcl_platform(platform) == "windows"} {
1189 # We need to fix some problems with menu posting on Windows.
1190 set yoffset [expr {[winfo screenheight $menu] \
1191 - $y - [winfo reqheight $menu]}]
1193 # The bottom of the menu is offscreen, so adjust upwards
1195 if {$y < 0} { set y 0 }
1197 # If we're off the top of the screen (either because we were
1198 # originally or because we just adjusted too far upwards),
1199 # then make the menu popup on the top edge.
1205 if {$entry ne "" && [$menu entrycget $entry -state] ne "disabled"} {
1206 $menu activate $entry
1207 GenerateMenuSelect $menu
1211 # ::tk::SaveGrabInfo --
1212 # Sets the variables tk::Priv(oldGrab) and tk::Priv(grabStatus) to record
1213 # the state of any existing grab on the w's display.
1216 # w - Name of a window; used to select the display
1217 # whose grab information is to be recorded.
1219 proc tk::SaveGrabInfo w {
1221 set Priv(oldGrab) [grab current $w]
1222 if {$Priv(oldGrab) ne ""} {
1223 set Priv(grabStatus) [grab status $Priv(oldGrab)]
1227 # ::tk::RestoreOldGrab --
1228 # Restores the grab to what it was before TkSaveGrabInfo was called.
1231 proc ::tk::RestoreOldGrab {} {
1234 if {$Priv(oldGrab) ne ""} {
1235 # Be careful restoring the old grab, since it's window may not
1236 # be visible anymore.
1239 if {[string equal $Priv(grabStatus) "global"]} {
1240 grab set -global $Priv(oldGrab)
1242 grab set $Priv(oldGrab)
1245 set Priv(oldGrab) ""
1249 proc ::tk_menuSetFocus {menu} {
1251 if {![info exists Priv(focus)] || [string equal $Priv(focus) {}]} {
1252 set Priv(focus) [focus]
1257 proc ::tk::GenerateMenuSelect {menu} {
1260 if {[string equal $Priv(activeMenu) $menu] \
1261 && [string equal $Priv(activeItem) [$menu index active]]} {
1265 set Priv(activeMenu) $menu
1266 set Priv(activeItem) [$menu index active]
1267 event generate $menu <<MenuSelect>>
1271 # This procedure pops up a menu and sets things up for traversing
1272 # the menu and its submenus.
1275 # menu - Name of the menu to be popped up.
1276 # x, y - Root coordinates at which to pop up the
1278 # entry - Index of a menu entry to center over (x,y).
1279 # If omitted or specified as {}, then menu's
1280 # upper-left corner goes at (x,y).
1282 proc ::tk_popup {menu x y {entry {}}} {
1285 if {$Priv(popup) ne "" || $Priv(postedMb) ne ""} {
1288 tk::PostOverPoint $menu $x $y $entry
1289 if {[tk windowingsystem] eq "x11" && [winfo viewable $menu]} {
1290 tk::SaveGrabInfo $menu
1292 set Priv(popup) $menu
1293 tk_menuSetFocus $menu