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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 2024-10-30 07:06:36 (GMT)