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-# menu.tcl --
-#
-# This file defines the default bindings for Tk menus and menubuttons.
-# It also implements keyboard traversal of menus and implements a few
-# other utility procedures related to menus.
-#
-# Copyright (c) 1992-1994 The Regents of the University of California.
-# Copyright (c) 1994-1997 Sun Microsystems, Inc.
-# Copyright (c) 1998-1999 by Scriptics Corporation.
-# Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net>
-#
-# See the file "license.terms" for information on usage and redistribution
-# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-#
-
-#-------------------------------------------------------------------------
-# Elements of tk::Priv that are used in this file:
-#
-# cursor - Saves the -cursor option for the posted menubutton.
-# focus - Saves the focus during a menu selection operation.
-# Focus gets restored here when the menu is unposted.
-# grabGlobal - Used in conjunction with tk::Priv(oldGrab): if
-# tk::Priv(oldGrab) is non-empty, then tk::Priv(grabGlobal)
-# contains either an empty string or "-global" to
-# indicate whether the old grab was a local one or
-# a global one.
-# inMenubutton - The name of the menubutton widget containing
-# the mouse, or an empty string if the mouse is
-# not over any menubutton.
-# menuBar - The name of the menubar that is the root
-# of the cascade hierarchy which is currently
-# posted. This is null when there is no menu currently
-# being pulled down from a menu bar.
-# oldGrab - Window that had the grab before a menu was posted.
-# Used to restore the grab state after the menu
-# is unposted. Empty string means there was no
-# grab previously set.
-# popup - If a menu has been popped up via tk_popup, this
-# gives the name of the menu. Otherwise this
-# value is empty.
-# postedMb - Name of the menubutton whose menu is currently
-# posted, or an empty string if nothing is posted
-# A grab is set on this widget.
-# relief - Used to save the original relief of the current
-# menubutton.
-# window - When the mouse is over a menu, this holds the
-# name of the menu; it's cleared when the mouse
-# leaves the menu.
-# tearoff - Whether the last menu posted was a tearoff or not.
-# This is true always for unix, for tearoffs for Mac
-# and Windows.
-# activeMenu - This is the last active menu for use
-# with the <<MenuSelect>> virtual event.
-# activeItem - This is the last active menu item for
-# use with the <<MenuSelect>> virtual event.
-#-------------------------------------------------------------------------
-
-#-------------------------------------------------------------------------
-# Overall note:
-# This file is tricky because there are five different ways that menus
-# can be used:
-#
-# 1. As a pulldown from a menubutton. In this style, the variable
-# tk::Priv(postedMb) identifies the posted menubutton.
-# 2. As a torn-off menu copied from some other menu. In this style
-# tk::Priv(postedMb) is empty, and menu's type is "tearoff".
-# 3. As an option menu, triggered from an option menubutton. In this
-# style tk::Priv(postedMb) identifies the posted menubutton.
-# 4. As a popup menu. In this style tk::Priv(postedMb) is empty and
-# the top-level menu's type is "normal".
-# 5. As a pulldown from a menubar. The variable tk::Priv(menubar) has
-# the owning menubar, and the menu itself is of type "normal".
-#
-# The various binding procedures use the state described above to
-# distinguish the various cases and take different actions in each
-# case.
-#-------------------------------------------------------------------------
-
-#-------------------------------------------------------------------------
-# The code below creates the default class bindings for menus
-# and menubuttons.
-#-------------------------------------------------------------------------
-
-bind Menubutton <FocusIn> {}
-bind Menubutton <Enter> {
- tk::MbEnter %W
-}
-bind Menubutton <Leave> {
- tk::MbLeave %W
-}
-bind Menubutton <1> {
- if {$tk::Priv(inMenubutton) ne ""} {
- tk::MbPost $tk::Priv(inMenubutton) %X %Y
- }
-}
-bind Menubutton <Motion> {
- tk::MbMotion %W up %X %Y
-}
-bind Menubutton <B1-Motion> {
- tk::MbMotion %W down %X %Y
-}
-bind Menubutton <ButtonRelease-1> {
- tk::MbButtonUp %W
-}
-bind Menubutton <space> {
- tk::MbPost %W
- tk::MenuFirstEntry [%W cget -menu]
-}
-bind Menubutton <<Invoke>> {
- tk::MbPost %W
- tk::MenuFirstEntry [%W cget -menu]
-}
-
-# Must set focus when mouse enters a menu, in order to allow
-# mixed-mode processing using both the mouse and the keyboard.
-# Don't set the focus if the event comes from a grab release,
-# though: such an event can happen after as part of unposting
-# a cascaded chain of menus, after the focus has already been
-# restored to wherever it was before menu selection started.
-
-bind Menu <FocusIn> {}
-
-bind Menu <Enter> {
- set tk::Priv(window) %W
- if {[%W cget -type] eq "tearoff"} {
- if {"%m" ne "NotifyUngrab"} {
- if {[tk windowingsystem] eq "x11"} {
- tk_menuSetFocus %W
- }
- }
- }
- tk::MenuMotion %W %x %y %s
-}
-
-bind Menu <Leave> {
- tk::MenuLeave %W %X %Y %s
-}
-bind Menu <Motion> {
- tk::MenuMotion %W %x %y %s
-}
-bind Menu <ButtonPress> {
- tk::MenuButtonDown %W
-}
-bind Menu <ButtonRelease> {
- tk::MenuInvoke %W 1
-}
-bind Menu <space> {
- tk::MenuInvoke %W 0
-}
-bind Menu <<Invoke>> {
- tk::MenuInvoke %W 0
-}
-bind Menu <Return> {
- tk::MenuInvoke %W 0
-}
-bind Menu <Escape> {
- tk::MenuEscape %W
-}
-bind Menu <<PrevChar>> {
- tk::MenuLeftArrow %W
-}
-bind Menu <<NextChar>> {
- tk::MenuRightArrow %W
-}
-bind Menu <<PrevLine>> {
- tk::MenuUpArrow %W
-}
-bind Menu <<NextLine>> {
- tk::MenuDownArrow %W
-}
-bind Menu <KeyPress> {
- tk::TraverseWithinMenu %W %A
- break
-}
-
-# The following bindings apply to all windows, and are used to
-# implement keyboard menu traversal.
-
-if {[tk windowingsystem] eq "x11"} {
- bind all <Alt-KeyPress> {
- tk::TraverseToMenu %W %A
- }
-
- bind all <F10> {
- tk::FirstMenu %W
- }
-} else {
- bind Menubutton <Alt-KeyPress> {
- tk::TraverseToMenu %W %A
- }
-
- bind Menubutton <F10> {
- tk::FirstMenu %W
- }
-}
-
-# ::tk::MbEnter --
-# This procedure is invoked when the mouse enters a menubutton
-# widget. It activates the widget unless it is disabled. Note:
-# this procedure is only invoked when mouse button 1 is *not* down.
-# The procedure ::tk::MbB1Enter is invoked if the button is down.
-#
-# Arguments:
-# w - The name of the widget.
-
-proc ::tk::MbEnter w {
- variable ::tk::Priv
-
- if {$Priv(inMenubutton) ne ""} {
- MbLeave $Priv(inMenubutton)
- }
- set Priv(inMenubutton) $w
- if {[$w cget -state] ne "disabled" && [tk windowingsystem] ne "aqua"} {
- $w configure -state active
- }
-}
-
-# ::tk::MbLeave --
-# This procedure is invoked when the mouse leaves a menubutton widget.
-# It de-activates the widget, if the widget still exists.
-#
-# Arguments:
-# w - The name of the widget.
-
-proc ::tk::MbLeave w {
- variable ::tk::Priv
-
- set Priv(inMenubutton) {}
- if {![winfo exists $w]} {
- return
- }
- if {[$w cget -state] eq "active" && [tk windowingsystem] ne "aqua"} {
- $w configure -state normal
- }
-}
-
-# ::tk::MbPost --
-# Given a menubutton, this procedure does all the work of posting
-# its associated menu and unposting any other menu that is currently
-# posted.
-#
-# Arguments:
-# w - The name of the menubutton widget whose menu
-# is to be posted.
-# x, y - Root coordinates of cursor, used for positioning
-# option menus. If not specified, then the center
-# of the menubutton is used for an option menu.
-
-proc ::tk::MbPost {w {x {}} {y {}}} {
- global errorInfo
- variable ::tk::Priv
-
- if {[$w cget -state] eq "disabled" || $w eq $Priv(postedMb)} {
- return
- }
- set menu [$w cget -menu]
- if {$menu eq ""} {
- return
- }
- set tearoff [expr {[tk windowingsystem] eq "x11" \
- || [$menu cget -type] eq "tearoff"}]
- if {[string first $w $menu] != 0} {
- return -code error -errorcode {TK MENUBUTTON POST_NONCHILD} \
- "can't post $menu: it isn't a descendant of $w"
- }
- set cur $Priv(postedMb)
- if {$cur ne ""} {
- MenuUnpost {}
- }
- if {$::tk_strictMotif} {
- set Priv(cursor) [$w cget -cursor]
- $w configure -cursor arrow
- }
- if {[tk windowingsystem] ne "aqua"} {
- set Priv(relief) [$w cget -relief]
- $w configure -relief raised
- } else {
- $w configure -state active
- }
-
- set Priv(postedMb) $w
- set Priv(focus) [focus]
- $menu activate none
- GenerateMenuSelect $menu
-
- # If this looks like an option menubutton then post the menu so
- # that the current entry is on top of the mouse. Otherwise post
- # the menu just below the menubutton, as for a pull-down.
-
- update idletasks
- if {[catch {
- switch [$w cget -direction] {
- above {
- set x [winfo rootx $w]
- set y [expr {[winfo rooty $w] - [winfo reqheight $menu]}]
- # if we go offscreen to the top, show as 'below'
- if {$y < [winfo vrooty $w]} {
- set y [expr {[winfo vrooty $w] + [winfo rooty $w] + [winfo reqheight $w]}]
- }
- PostOverPoint $menu $x $y
- }
- below {
- set x [winfo rootx $w]
- set y [expr {[winfo rooty $w] + [winfo height $w]}]
- # if we go offscreen to the bottom, show as 'above'
- set mh [winfo reqheight $menu]
- if {($y + $mh) > ([winfo vrooty $w] + [winfo vrootheight $w])} {
- set y [expr {[winfo vrooty $w] + [winfo vrootheight $w] + [winfo rooty $w] - $mh}]
- }
- PostOverPoint $menu $x $y
- }
- left {
- set x [expr {[winfo rootx $w] - [winfo reqwidth $menu]}]
- set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}]
- set entry [MenuFindName $menu [$w cget -text]]
- if {$entry eq ""} {
- set entry 0
- }
- if {[$w cget -indicatoron]} {
- if {$entry == [$menu index last]} {
- incr y [expr {-([$menu yposition $entry] \
- + [winfo reqheight $menu])/2}]
- } else {
- incr y [expr {-([$menu yposition $entry] \
- + [$menu yposition [expr {$entry+1}]])/2}]
- }
- }
- PostOverPoint $menu $x $y
- if {$entry ne "" \
- && [$menu entrycget $entry -state] ne "disabled"} {
- $menu activate $entry
- GenerateMenuSelect $menu
- }
- }
- right {
- set x [expr {[winfo rootx $w] + [winfo width $w]}]
- set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}]
- set entry [MenuFindName $menu [$w cget -text]]
- if {$entry eq ""} {
- set entry 0
- }
- if {[$w cget -indicatoron]} {
- if {$entry == [$menu index last]} {
- incr y [expr {-([$menu yposition $entry] \
- + [winfo reqheight $menu])/2}]
- } else {
- incr y [expr {-([$menu yposition $entry] \
- + [$menu yposition [expr {$entry+1}]])/2}]
- }
- }
- PostOverPoint $menu $x $y
- if {$entry ne "" \
- && [$menu entrycget $entry -state] ne "disabled"} {
- $menu activate $entry
- GenerateMenuSelect $menu
- }
- }
- default {
- if {[$w cget -indicatoron]} {
- if {$y eq ""} {
- set x [expr {[winfo rootx $w] + [winfo width $w]/2}]
- set y [expr {[winfo rooty $w] + [winfo height $w]/2}]
- }
- PostOverPoint $menu $x $y [MenuFindName $menu [$w cget -text]]
- } else {
- PostOverPoint $menu [winfo rootx $w] [expr {[winfo rooty $w]+[winfo height $w]}]
- }
- }
- }
- } msg opt]} {
- # Error posting menu (e.g. bogus -postcommand). Unpost it and
- # reflect the error.
-
- MenuUnpost {}
- return -options $opt $msg
- }
-
- set Priv(tearoff) $tearoff
- if {$tearoff != 0} {
- focus $menu
- if {[winfo viewable $w]} {
- SaveGrabInfo $w
- grab -global $w
- }
- }
-}
-
-# ::tk::MenuUnpost --
-# This procedure unposts a given menu, plus all of its ancestors up
-# to (and including) a menubutton, if any. It also restores various
-# values to what they were before the menu was posted, and releases
-# a grab if there's a menubutton involved. Special notes:
-# 1. It's important to unpost all menus before releasing the grab, so
-# that any Enter-Leave events (e.g. from menu back to main
-# application) have mode NotifyGrab.
-# 2. Be sure to enclose various groups of commands in "catch" so that
-# the procedure will complete even if the menubutton or the menu
-# or the grab window has been deleted.
-#
-# Arguments:
-# menu - Name of a menu to unpost. Ignored if there
-# is a posted menubutton.
-
-proc ::tk::MenuUnpost menu {
- variable ::tk::Priv
- set mb $Priv(postedMb)
-
- # Restore focus right away (otherwise X will take focus away when
- # the menu is unmapped and under some window managers (e.g. olvwm)
- # we'll lose the focus completely).
-
- catch {focus $Priv(focus)}
- set Priv(focus) ""
-
- # Unpost menu(s) and restore some stuff that's dependent on
- # what was posted.
-
- after cancel [array get Priv menuActivatedTimer]
- unset -nocomplain Priv(menuActivated)
- after cancel [array get Priv menuDeactivatedTimer]
- unset -nocomplain Priv(menuDeactivated)
-
- catch {
- if {$mb ne ""} {
- set menu [$mb cget -menu]
- $menu unpost
- set Priv(postedMb) {}
- if {$::tk_strictMotif} {
- $mb configure -cursor $Priv(cursor)
- }
- if {[tk windowingsystem] ne "aqua"} {
- $mb configure -relief $Priv(relief)
- } else {
- $mb configure -state normal
- }
- } elseif {$Priv(popup) ne ""} {
- $Priv(popup) unpost
- set Priv(popup) {}
- } elseif {[$menu cget -type] ne "menubar" && [$menu cget -type] ne "tearoff"} {
- # We're in a cascaded sub-menu from a torn-off menu or popup.
- # Unpost all the menus up to the toplevel one (but not
- # including the top-level torn-off one) and deactivate the
- # top-level torn off menu if there is one.
-
- while {1} {
- set parent [winfo parent $menu]
- if {[winfo class $parent] ne "Menu" || ![winfo ismapped $parent]} {
- break
- }
- $parent activate none
- $parent postcascade none
- GenerateMenuSelect $parent
- set type [$parent cget -type]
- if {$type eq "menubar" || $type eq "tearoff"} {
- break
- }
- set menu $parent
- }
- if {[$menu cget -type] ne "menubar"} {
- $menu unpost
- }
- }
- }
-
- if {($Priv(tearoff) != 0) || $Priv(menuBar) ne ""} {
- # Release grab, if any, and restore the previous grab, if there
- # was one.
- if {$menu ne ""} {
- set grab [grab current $menu]
- if {$grab ne ""} {
- grab release $grab
- }
- }
- RestoreOldGrab
- if {$Priv(menuBar) ne ""} {
- if {$::tk_strictMotif} {
- $Priv(menuBar) configure -cursor $Priv(cursor)
- }
- set Priv(menuBar) {}
- }
- if {[tk windowingsystem] ne "x11"} {
- set Priv(tearoff) 0
- }
- }
-}
-
-# ::tk::MbMotion --
-# This procedure handles mouse motion events inside menubuttons, and
-# also outside menubuttons when a menubutton has a grab (e.g. when a
-# menu selection operation is in progress).
-#
-# Arguments:
-# w - The name of the menubutton widget.
-# upDown - "down" means button 1 is pressed, "up" means
-# it isn't.
-# rootx, rooty - Coordinates of mouse, in (virtual?) root window.
-
-proc ::tk::MbMotion {w upDown rootx rooty} {
- variable ::tk::Priv
-
- if {$Priv(inMenubutton) eq $w} {
- return
- }
- set new [winfo containing $rootx $rooty]
- if {$new ne $Priv(inMenubutton) \
- && ($new eq "" || [winfo toplevel $new] eq [winfo toplevel $w])} {
- if {$Priv(inMenubutton) ne ""} {
- MbLeave $Priv(inMenubutton)
- }
- if {$new ne "" \
- && [winfo class $new] eq "Menubutton" \
- && ([$new cget -indicatoron] == 0) \
- && ([$w cget -indicatoron] == 0)} {
- if {$upDown eq "down"} {
- MbPost $new $rootx $rooty
- } else {
- MbEnter $new
- }
- }
- }
-}
-
-# ::tk::MbButtonUp --
-# This procedure is invoked to handle button 1 releases for menubuttons.
-# If the release happens inside the menubutton then leave its menu
-# posted with element 0 activated. Otherwise, unpost the menu.
-#
-# Arguments:
-# w - The name of the menubutton widget.
-
-proc ::tk::MbButtonUp w {
- variable ::tk::Priv
-
- set menu [$w cget -menu]
- set tearoff [expr {[tk windowingsystem] eq "x11" || \
- ($menu ne "" && [$menu cget -type] eq "tearoff")}]
- if {($tearoff != 0) && $Priv(postedMb) eq $w \
- && $Priv(inMenubutton) eq $w} {
- MenuFirstEntry [$Priv(postedMb) cget -menu]
- } else {
- MenuUnpost {}
- }
-}
-
-# ::tk::MenuMotion --
-# This procedure is called to handle mouse motion events for menus.
-# It does two things. First, it resets the active element in the
-# menu, if the mouse is over the menu. Second, if a mouse button
-# is down, it posts and unposts cascade entries to match the mouse
-# position.
-#
-# Arguments:
-# menu - The menu window.
-# x - The x position of the mouse.
-# y - The y position of the mouse.
-# state - Modifier state (tells whether buttons are down).
-
-proc ::tk::MenuMotion {menu x y state} {
- variable ::tk::Priv
- if {$menu eq $Priv(window)} {
- set activeindex [$menu index active]
- if {[$menu cget -type] eq "menubar"} {
- if {[info exists Priv(focus)] && $menu ne $Priv(focus)} {
- $menu activate @$x,$y
- GenerateMenuSelect $menu
- }
- } else {
- $menu activate @$x,$y
- GenerateMenuSelect $menu
- }
- set index [$menu index @$x,$y]
- if {[info exists Priv(menuActivated)] \
- && $index ne "none" \
- && $index ne $activeindex} {
- set mode [option get $menu clickToFocus ClickToFocus]
- if {[string is false $mode]} {
- set delay [expr {[$menu cget -type] eq "menubar" ? 0 : 50}]
- if {[$menu type $index] eq "cascade"} {
- set Priv(menuActivatedTimer) \
- [after $delay [list $menu postcascade active]]
- } else {
- set Priv(menuDeactivatedTimer) \
- [after $delay [list $menu postcascade none]]
- }
- }
- }
- }
-}
-
-# ::tk::MenuButtonDown --
-# Handles button presses in menus. There are a couple of tricky things
-# here:
-# 1. Change the posted cascade entry (if any) to match the mouse position.
-# 2. If there is a posted menubutton, must grab to the menubutton; this
-# overrrides the implicit grab on button press, so that the menu
-# button can track mouse motions over other menubuttons and change
-# the posted menu.
-# 3. If there's no posted menubutton (e.g. because we're a torn-off menu
-# or one of its descendants) must grab to the top-level menu so that
-# we can track mouse motions across the entire menu hierarchy.
-#
-# Arguments:
-# menu - The menu window.
-
-proc ::tk::MenuButtonDown menu {
- variable ::tk::Priv
-
- if {![winfo viewable $menu]} {
- return
- }
- if {[$menu index active] eq "none"} {
- set Priv(window) {}
- return
- }
- $menu postcascade active
- if {$Priv(postedMb) ne "" && [winfo viewable $Priv(postedMb)]} {
- grab -global $Priv(postedMb)
- } else {
- while {[$menu cget -type] eq "normal" \
- && [winfo class [winfo parent $menu]] eq "Menu" \
- && [winfo ismapped [winfo parent $menu]]} {
- set menu [winfo parent $menu]
- }
-
- if {$Priv(menuBar) eq {}} {
- set Priv(menuBar) $menu
- if {$::tk_strictMotif} {
- set Priv(cursor) [$menu cget -cursor]
- $menu configure -cursor arrow
- }
- if {[$menu type active] eq "cascade"} {
- set Priv(menuActivated) 1
- }
- }
-
- # Don't update grab information if the grab window isn't changing.
- # Otherwise, we'll get an error when we unpost the menus and
- # restore the grab, since the old grab window will not be viewable
- # anymore.
-
- if {$menu ne [grab current $menu]} {
- SaveGrabInfo $menu
- }
-
- # Must re-grab even if the grab window hasn't changed, in order
- # to release the implicit grab from the button press.
-
- if {[tk windowingsystem] eq "x11"} {
- grab -global $menu
- }
- }
-}
-
-# ::tk::MenuLeave --
-# This procedure is invoked to handle Leave events for a menu. It
-# deactivates everything unless the active element is a cascade element
-# and the mouse is now over the submenu.
-#
-# Arguments:
-# menu - The menu window.
-# rootx, rooty - Root coordinates of mouse.
-# state - Modifier state.
-
-proc ::tk::MenuLeave {menu rootx rooty state} {
- variable ::tk::Priv
- set Priv(window) {}
- if {[$menu index active] eq "none"} {
- return
- }
- if {[$menu type active] eq "cascade" \
- && [winfo containing $rootx $rooty] eq \
- [$menu entrycget active -menu]} {
- return
- }
- $menu activate none
- GenerateMenuSelect $menu
-}
-
-# ::tk::MenuInvoke --
-# This procedure is invoked when button 1 is released over a menu.
-# It invokes the appropriate menu action and unposts the menu if
-# it came from a menubutton.
-#
-# Arguments:
-# w - Name of the menu widget.
-# buttonRelease - 1 means this procedure is called because of
-# a button release; 0 means because of keystroke.
-
-proc ::tk::MenuInvoke {w buttonRelease} {
- variable ::tk::Priv
-
- if {$buttonRelease && $Priv(window) eq ""} {
- # Mouse was pressed over a menu without a menu button, then
- # dragged off the menu (possibly with a cascade posted) and
- # released. Unpost everything and quit.
-
- $w postcascade none
- $w activate none
- event generate $w <<MenuSelect>>
- MenuUnpost $w
- return
- }
- if {[$w type active] eq "cascade"} {
- $w postcascade active
- set menu [$w entrycget active -menu]
- MenuFirstEntry $menu
- } elseif {[$w type active] eq "tearoff"} {
- ::tk::TearOffMenu $w
- MenuUnpost $w
- } elseif {[$w cget -type] eq "menubar"} {
- $w postcascade none
- set active [$w index active]
- set isCascade [string equal [$w type $active] "cascade"]
-
- # Only de-activate the active item if it's a cascade; this prevents
- # the annoying "activation flicker" you otherwise get with
- # checkbuttons/commands/etc. on menubars
-
- if { $isCascade } {
- $w activate none
- event generate $w <<MenuSelect>>
- }
-
- MenuUnpost $w
-
- # If the active item is not a cascade, invoke it. This enables
- # the use of checkbuttons/commands/etc. on menubars (which is legal,
- # but not recommended)
-
- if { !$isCascade } {
- uplevel #0 [list $w invoke $active]
- }
- } else {
- set active [$w index active]
- if {$Priv(popup) eq "" || $active ne "none"} {
- MenuUnpost $w
- }
- uplevel #0 [list $w invoke active]
- }
-}
-
-# ::tk::MenuEscape --
-# This procedure is invoked for the Cancel (or Escape) key. It unposts
-# the given menu and, if it is the top-level menu for a menu button,
-# unposts the menu button as well.
-#
-# Arguments:
-# menu - Name of the menu window.
-
-proc ::tk::MenuEscape menu {
- set parent [winfo parent $menu]
- if {[winfo class $parent] ne "Menu"} {
- MenuUnpost $menu
- } elseif {[$parent cget -type] eq "menubar"} {
- MenuUnpost $menu
- RestoreOldGrab
- } else {
- MenuNextMenu $menu left
- }
-}
-
-# The following routines handle arrow keys. Arrow keys behave
-# differently depending on whether the menu is a menu bar or not.
-
-proc ::tk::MenuUpArrow {menu} {
- if {[$menu cget -type] eq "menubar"} {
- MenuNextMenu $menu left
- } else {
- MenuNextEntry $menu -1
- }
-}
-
-proc ::tk::MenuDownArrow {menu} {
- if {[$menu cget -type] eq "menubar"} {
- MenuNextMenu $menu right
- } else {
- MenuNextEntry $menu 1
- }
-}
-
-proc ::tk::MenuLeftArrow {menu} {
- if {[$menu cget -type] eq "menubar"} {
- MenuNextEntry $menu -1
- } else {
- MenuNextMenu $menu left
- }
-}
-
-proc ::tk::MenuRightArrow {menu} {
- if {[$menu cget -type] eq "menubar"} {
- MenuNextEntry $menu 1
- } else {
- MenuNextMenu $menu right
- }
-}
-
-# ::tk::MenuNextMenu --
-# This procedure is invoked to handle "left" and "right" traversal
-# motions in menus. It traverses to the next menu in a menu bar,
-# or into or out of a cascaded menu.
-#
-# Arguments:
-# menu - The menu that received the keyboard
-# event.
-# direction - Direction in which to move: "left" or "right"
-
-proc ::tk::MenuNextMenu {menu direction} {
- variable ::tk::Priv
-
- # First handle traversals into and out of cascaded menus.
-
- if {$direction eq "right"} {
- set count 1
- set parent [winfo parent $menu]
- set class [winfo class $parent]
- if {[$menu type active] eq "cascade"} {
- $menu postcascade active
- set m2 [$menu entrycget active -menu]
- if {$m2 ne ""} {
- MenuFirstEntry $m2
- }
- return
- } else {
- set parent [winfo parent $menu]
- while {$parent ne "."} {
- if {[winfo class $parent] eq "Menu" \
- && [$parent cget -type] eq "menubar"} {
- tk_menuSetFocus $parent
- MenuNextEntry $parent 1
- return
- }
- set parent [winfo parent $parent]
- }
- }
- } else {
- set count -1
- set m2 [winfo parent $menu]
- if {[winfo class $m2] eq "Menu"} {
- $menu activate none
- GenerateMenuSelect $menu
- tk_menuSetFocus $m2
-
- $m2 postcascade none
-
- if {[$m2 cget -type] ne "menubar"} {
- return
- }
- }
- }
-
- # Can't traverse into or out of a cascaded menu. Go to the next
- # or previous menubutton, if that makes sense.
-
- set m2 [winfo parent $menu]
- if {[winfo class $m2] eq "Menu" && [$m2 cget -type] eq "menubar"} {
- tk_menuSetFocus $m2
- MenuNextEntry $m2 -1
- return
- }
-
- set w $Priv(postedMb)
- if {$w eq ""} {
- return
- }
- set buttons [winfo children [winfo parent $w]]
- set length [llength $buttons]
- set i [expr {[lsearch -exact $buttons $w] + $count}]
- while {1} {
- while {$i < 0} {
- incr i $length
- }
- while {$i >= $length} {
- incr i -$length
- }
- set mb [lindex $buttons $i]
- if {[winfo class $mb] eq "Menubutton" \
- && [$mb cget -state] ne "disabled" \
- && [$mb cget -menu] ne "" \
- && [[$mb cget -menu] index last] ne "none"} {
- break
- }
- if {$mb eq $w} {
- return
- }
- incr i $count
- }
- MbPost $mb
- MenuFirstEntry [$mb cget -menu]
-}
-
-# ::tk::MenuNextEntry --
-# Activate the next higher or lower entry in the posted menu,
-# wrapping around at the ends. Disabled entries are skipped.
-#
-# Arguments:
-# menu - Menu window that received the keystroke.
-# count - 1 means go to the next lower entry,
-# -1 means go to the next higher entry.
-
-proc ::tk::MenuNextEntry {menu count} {
- if {[$menu index last] eq "none"} {
- return
- }
- set length [expr {[$menu index last]+1}]
- set quitAfter $length
- set active [$menu index active]
- if {$active eq "none"} {
- set i 0
- } else {
- set i [expr {$active + $count}]
- }
- while {1} {
- if {$quitAfter <= 0} {
- # We've tried every entry in the menu. Either there are
- # none, or they're all disabled. Just give up.
-
- return
- }
- while {$i < 0} {
- incr i $length
- }
- while {$i >= $length} {
- incr i -$length
- }
- if {[catch {$menu entrycget $i -state} state] == 0} {
- if {$state ne "disabled" && \
- ($i!=0 || [$menu cget -type] ne "tearoff" \
- || [$menu type 0] ne "tearoff")} {
- break
- }
- }
- if {$i == $active} {
- return
- }
- incr i $count
- incr quitAfter -1
- }
- $menu activate $i
- GenerateMenuSelect $menu
-
- if {[$menu type $i] eq "cascade" && [$menu cget -type] eq "menubar"} {
- set cascade [$menu entrycget $i -menu]
- if {$cascade ne ""} {
- # Here we auto-post a cascade. This is necessary when
- # we traverse left/right in the menubar, but undesirable when
- # we traverse up/down in a menu.
- $menu postcascade $i
- MenuFirstEntry $cascade
- }
- }
-}
-
-# ::tk::MenuFind --
-# This procedure searches the entire window hierarchy under w for
-# a menubutton that isn't disabled and whose underlined character
-# is "char" or an entry in a menubar that isn't disabled and whose
-# underlined character is "char".
-# It returns the name of that window, if found, or an
-# empty string if no matching window was found. If "char" is an
-# empty string then the procedure returns the name of the first
-# menubutton found that isn't disabled.
-#
-# Arguments:
-# w - Name of window where key was typed.
-# char - Underlined character to search for;
-# may be either upper or lower case, and
-# will match either upper or lower case.
-
-proc ::tk::MenuFind {w char} {
- set char [string tolower $char]
- set windowlist [winfo child $w]
-
- foreach child $windowlist {
- # Don't descend into other toplevels.
- if {[winfo toplevel $w] ne [winfo toplevel $child]} {
- continue
- }
- if {[winfo class $child] eq "Menu" && \
- [$child cget -type] eq "menubar"} {
- if {$char eq ""} {
- return $child
- }
- set last [$child index last]
- for {set i [$child cget -tearoff]} {$i <= $last} {incr i} {
- if {[$child type $i] eq "separator"} {
- continue
- }
- set char2 [string index [$child entrycget $i -label] \
- [$child entrycget $i -underline]]
- if {$char eq [string tolower $char2] || $char eq ""} {
- if {[$child entrycget $i -state] ne "disabled"} {
- return $child
- }
- }
- }
- }
- }
-
- foreach child $windowlist {
- # Don't descend into other toplevels.
- if {[winfo toplevel $w] ne [winfo toplevel $child]} {
- continue
- }
- switch -- [winfo class $child] {
- Menubutton {
- set char2 [string index [$child cget -text] \
- [$child cget -underline]]
- if {$char eq [string tolower $char2] || $char eq ""} {
- if {[$child cget -state] ne "disabled"} {
- return $child
- }
- }
- }
-
- default {
- set match [MenuFind $child $char]
- if {$match ne ""} {
- return $match
- }
- }
- }
- }
- return {}
-}
-
-# ::tk::TraverseToMenu --
-# This procedure implements keyboard traversal of menus. Given an
-# ASCII character "char", it looks for a menubutton with that character
-# underlined. If one is found, it posts the menubutton's menu
-#
-# Arguments:
-# w - Window in which the key was typed (selects
-# a toplevel window).
-# char - Character that selects a menu. The case
-# is ignored. If an empty string, nothing
-# happens.
-
-proc ::tk::TraverseToMenu {w char} {
- variable ::tk::Priv
- if {![winfo exists $w] || $char eq ""} {
- return
- }
- while {[winfo class $w] eq "Menu"} {
- if {[$w cget -type] eq "menubar"} {
- break
- } elseif {$Priv(postedMb) eq ""} {
- return
- }
- set w [winfo parent $w]
- }
- set w [MenuFind [winfo toplevel $w] $char]
- if {$w ne ""} {
- if {[winfo class $w] eq "Menu"} {
- tk_menuSetFocus $w
- set Priv(window) $w
- SaveGrabInfo $w
- grab -global $w
- TraverseWithinMenu $w $char
- } else {
- MbPost $w
- MenuFirstEntry [$w cget -menu]
- }
- }
-}
-
-# ::tk::FirstMenu --
-# This procedure traverses to the first menubutton in the toplevel
-# for a given window, and posts that menubutton's menu.
-#
-# Arguments:
-# w - Name of a window. Selects which toplevel
-# to search for menubuttons.
-
-proc ::tk::FirstMenu w {
- variable ::tk::Priv
- set w [MenuFind [winfo toplevel $w] ""]
- if {$w ne ""} {
- if {[winfo class $w] eq "Menu"} {
- tk_menuSetFocus $w
- set Priv(window) $w
- SaveGrabInfo $w
- grab -global $w
- MenuFirstEntry $w
- } else {
- MbPost $w
- MenuFirstEntry [$w cget -menu]
- }
- }
-}
-
-# ::tk::TraverseWithinMenu
-# This procedure implements keyboard traversal within a menu. It
-# searches for an entry in the menu that has "char" underlined. If
-# such an entry is found, it is invoked and the menu is unposted.
-#
-# Arguments:
-# w - The name of the menu widget.
-# char - The character to look for; case is
-# ignored. If the string is empty then
-# nothing happens.
-
-proc ::tk::TraverseWithinMenu {w char} {
- if {$char eq ""} {
- return
- }
- set char [string tolower $char]
- set last [$w index last]
- if {$last eq "none"} {
- return
- }
- for {set i 0} {$i <= $last} {incr i} {
- if {[catch {set char2 [string index \
- [$w entrycget $i -label] [$w entrycget $i -underline]]}]} {
- continue
- }
- if {$char eq [string tolower $char2]} {
- if {[$w type $i] eq "cascade"} {
- $w activate $i
- $w postcascade active
- event generate $w <<MenuSelect>>
- set m2 [$w entrycget $i -menu]
- if {$m2 ne ""} {
- MenuFirstEntry $m2
- }
- } else {
- MenuUnpost $w
- uplevel #0 [list $w invoke $i]
- }
- return
- }
- }
-}
-
-# ::tk::MenuFirstEntry --
-# Given a menu, this procedure finds the first entry that isn't
-# disabled or a tear-off or separator, and activates that entry.
-# However, if there is already an active entry in the menu (e.g.,
-# because of a previous call to tk::PostOverPoint) then the active
-# entry isn't changed. This procedure also sets the input focus
-# to the menu.
-#
-# Arguments:
-# menu - Name of the menu window (possibly empty).
-
-proc ::tk::MenuFirstEntry menu {
- if {$menu eq ""} {
- return
- }
- tk_menuSetFocus $menu
- if {[$menu index active] ne "none"} {
- return
- }
- set last [$menu index last]
- if {$last eq "none"} {
- return
- }
- for {set i 0} {$i <= $last} {incr i} {
- if {([catch {set state [$menu entrycget $i -state]}] == 0) \
- && $state ne "disabled" && [$menu type $i] ne "tearoff"} {
- $menu activate $i
- GenerateMenuSelect $menu
- # Only post the cascade if the current menu is a menubar;
- # otherwise, if the first entry of the cascade is a cascade,
- # we can get an annoying cascading effect resulting in a bunch of
- # menus getting posted (bug 676)
- if {[$menu type $i] eq "cascade" && [$menu cget -type] eq "menubar"} {
- set cascade [$menu entrycget $i -menu]
- if {$cascade ne ""} {
- $menu postcascade $i
- MenuFirstEntry $cascade
- }
- }
- return
- }
- }
-}
-
-# ::tk::MenuFindName --
-# Given a menu and a text string, return the index of the menu entry
-# that displays the string as its label. If there is no such entry,
-# return an empty string. This procedure is tricky because some names
-# like "active" have a special meaning in menu commands, so we can't
-# always use the "index" widget command.
-#
-# Arguments:
-# menu - Name of the menu widget.
-# s - String to look for.
-
-proc ::tk::MenuFindName {menu s} {
- set i ""
- if {![regexp {^active$|^last$|^none$|^[0-9]|^@} $s]} {
- catch {set i [$menu index $s]}
- return $i
- }
- set last [$menu index last]
- if {$last eq "none"} {
- return
- }
- for {set i 0} {$i <= $last} {incr i} {
- if {![catch {$menu entrycget $i -label} label]} {
- if {$label eq $s} {
- return $i
- }
- }
- }
- return ""
-}
-
-# ::tk::PostOverPoint --
-# This procedure posts a given menu such that a given entry in the
-# menu is centered over a given point in the root window. It also
-# activates the given entry.
-#
-# Arguments:
-# menu - Menu to post.
-# x, y - Root coordinates of point.
-# entry - Index of entry within menu to center over (x,y).
-# If omitted or specified as {}, then the menu's
-# upper-left corner goes at (x,y).
-
-proc ::tk::PostOverPoint {menu x y {entry {}}} {
- if {$entry ne ""} {
- if {$entry == [$menu index last]} {
- incr y [expr {-([$menu yposition $entry] \
- + [winfo reqheight $menu])/2}]
- } else {
- incr y [expr {-([$menu yposition $entry] \
- + [$menu yposition [expr {$entry+1}]])/2}]
- }
- incr x [expr {-[winfo reqwidth $menu]/2}]
- }
-
- if {[tk windowingsystem] eq "win32"} {
- # osVersion is not available in safe interps
- set ver 5
- if {[info exists ::tcl_platform(osVersion)]} {
- scan $::tcl_platform(osVersion) %d ver
- }
-
- # We need to fix some problems with menu posting on Windows,
- # where, if the menu would overlap top or bottom of screen,
- # Windows puts it in the wrong place for us. We must also
- # subtract an extra amount for half the height of the current
- # entry. To be safe we subtract an extra 10.
- # NOTE: this issue appears to have been resolved in the Window
- # manager provided with Vista and Windows 7.
- if {$ver < 6} {
- set yoffset [expr {[winfo screenheight $menu] \
- - $y - [winfo reqheight $menu] - 10}]
- if {$yoffset < [winfo vrooty $menu]} {
- # The bottom of the menu is offscreen, so adjust upwards
- incr y [expr {$yoffset - [winfo vrooty $menu]}]
- }
- # If we're off the top of the screen (either because we were
- # originally or because we just adjusted too far upwards),
- # then make the menu popup on the top edge.
- if {$y < [winfo vrooty $menu]} {
- set y [winfo vrooty $menu]
- }
- }
- }
- $menu post $x $y
- if {$entry ne "" && [$menu entrycget $entry -state] ne "disabled"} {
- $menu activate $entry
- GenerateMenuSelect $menu
- }
-}
-
-# ::tk::SaveGrabInfo --
-# Sets the variables tk::Priv(oldGrab) and tk::Priv(grabStatus) to record
-# the state of any existing grab on the w's display.
-#
-# Arguments:
-# w - Name of a window; used to select the display
-# whose grab information is to be recorded.
-
-proc tk::SaveGrabInfo w {
- variable ::tk::Priv
- set Priv(oldGrab) [grab current $w]
- if {$Priv(oldGrab) ne ""} {
- set Priv(grabStatus) [grab status $Priv(oldGrab)]
- }
-}
-
-# ::tk::RestoreOldGrab --
-# Restores the grab to what it was before TkSaveGrabInfo was called.
-#
-
-proc ::tk::RestoreOldGrab {} {
- variable ::tk::Priv
-
- if {$Priv(oldGrab) ne ""} {
- # Be careful restoring the old grab, since it's window may not
- # be visible anymore.
-
- catch {
- if {$Priv(grabStatus) eq "global"} {
- grab set -global $Priv(oldGrab)
- } else {
- grab set $Priv(oldGrab)
- }
- }
- set Priv(oldGrab) ""
- }
-}
-
-proc ::tk_menuSetFocus {menu} {
- variable ::tk::Priv
- if {![info exists Priv(focus)] || $Priv(focus) eq ""} {
- set Priv(focus) [focus]
- }
- focus $menu
-}
-
-proc ::tk::GenerateMenuSelect {menu} {
- variable ::tk::Priv
-
- if {$Priv(activeMenu) eq $menu \
- && $Priv(activeItem) eq [$menu index active]} {
- return
- }
-
- set Priv(activeMenu) $menu
- set Priv(activeItem) [$menu index active]
- event generate $menu <<MenuSelect>>
-}
-
-# ::tk_popup --
-# This procedure pops up a menu and sets things up for traversing
-# the menu and its submenus.
-#
-# Arguments:
-# menu - Name of the menu to be popped up.
-# x, y - Root coordinates at which to pop up the
-# menu.
-# entry - Index of a menu entry to center over (x,y).
-# If omitted or specified as {}, then menu's
-# upper-left corner goes at (x,y).
-
-proc ::tk_popup {menu x y {entry {}}} {
- variable ::tk::Priv
- if {$Priv(popup) ne "" || $Priv(postedMb) ne ""} {
- tk::MenuUnpost {}
- }
- tk::PostOverPoint $menu $x $y $entry
- if {[tk windowingsystem] eq "x11" && [winfo viewable $menu]} {
- tk::SaveGrabInfo $menu
- grab -global $menu
- set Priv(popup) $menu
- set Priv(window) $menu
- set Priv(menuActivated) 1
- tk_menuSetFocus $menu
- }
-}
generated by cgit v0.12 at 2025-08-30 20:43:13 (GMT)