menu.tcl
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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.
- #
- # RCS: @(#) $Id: menu.tcl,v 1.18.2.5 2007/11/09 06:26:54 das Exp $
- #
- # 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]
- }
- # 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 <Return> {
- tk::MenuInvoke %W 0
- }
- bind Menu <Escape> {
- tk::MenuEscape %W
- }
- bind Menu <Left> {
- tk::MenuLeftArrow %W
- }
- bind Menu <Right> {
- tk::MenuRightArrow %W
- }
- bind Menu <Up> {
- tk::MenuUpArrow %W
- }
- bind Menu <Down> {
- tk::MenuDownArrow %W
- }
- bind Menu <KeyPress> {
- tk::TraverseWithinMenu %W %A
- }
- # 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"} {
- $w configure -state normal
- }
- }
- # ::tk::MbPost --
- # Given a menubutton, this procedure does all the work of posting
- # its associated menu and unposting any other menu that is currently
- # posted.
- #
- # Arguments:
- # w - The name of the menubutton widget whose menu
- # is to be posted.
- # x, y - Root coordinates of cursor, used for positioning
- # option menus. If not specified, then the center
- # of the menubutton is used for an option menu.
- proc ::tk::MbPost {w {x {}} {y {}}} {
- global errorInfo
- variable ::tk::Priv
- global tcl_platform
- if {[$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} {
- error "can't post $menu: it isn't a descendant of $w (this is a new requirement in Tk versions 3.0 and later)"
- }
- set cur $Priv(postedMb)
- if {$cur ne ""} {
- MenuUnpost {}
- }
- 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 < 0} {
- set y [expr {[winfo rooty $w] + [winfo height $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 screenheight $w]} {
- set y [expr {[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 {[$w cget -indicatoron]} {
- if {$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 {[$w cget -indicatoron]} {
- if {$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]} {
- # Error posting menu (e.g. bogus -postcommand). Unpost it and
- # reflect the error.
-
- set savedInfo $errorInfo
- MenuUnpost {}
- error $msg $savedInfo
- }
- 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 {
- global tcl_platform
- 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 $Priv(focus)}
- set Priv(focus) ""
- # Unpost menu(s) and restore some stuff that's dependent on
- # what was posted.
- catch {
- if {$mb ne ""} {
- set menu [$mb cget -menu]
- $menu unpost
- set Priv(postedMb) {}
- $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 ""} {
- $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 $new
- }
- }
- }
- }
- # ::tk::MbButtonUp --
- # This procedure is invoked to handle button 1 releases for menubuttons.
- # If the release happens inside the menubutton then leave its menu
- # posted with element 0 activated. Otherwise, unpost the menu.
- #
- # Arguments:
- # w - The name of the menubutton widget.
- proc ::tk::MbButtonUp w {
- variable ::tk::Priv
- global tcl_platform
- set menu [$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 $Priv(window)} {
- if {[$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 $menu
- }
- }
- if {($state & 0x1f00) != 0} {
- $menu postcascade active
- }
- }
- # ::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
- global tcl_platform
- if {![winfo viewable $menu]} {
- 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) $menu
- set Priv(cursor) [$menu cget -cursor]
- $menu configure -cursor arrow
- }
- # Don't update grab information if the grab window isn't changing.
- # Otherwise, we'll get an error when we unpost the menus and
- # restore the grab, since the old grab window will not be viewable
- # anymore.
- if {$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 $m2] eq "Menu"} {
- if {[$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 $match
- }
- }
- }
- }
- return {}
- }
- # ::tk::TraverseToMenu --
- # This procedure implements keyboard traversal of menus. Given an
- # ASCII character "char", it looks for a menubutton with that character
- # underlined. If one is found, it posts the menubutton's menu
- #
- # Arguments:
- # w - Window in which the key was typed (selects
- # a toplevel window).
- # char - Character that selects a menu. The case
- # is ignored. If an empty string, nothing
- # happens.
- proc ::tk::TraverseToMenu {w char} {
- variable ::tk::Priv
- if {$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 $i
- }
- }
- }
- return ""
- }
- # ::tk::PostOverPoint --
- # This procedure posts a given menu such that a given entry in the
- # menu is centered over a given point in the root window. It also
- # activates the given entry.
- #
- # Arguments:
- # menu - Menu to post.
- # x, y - Root coordinates of point.
- # entry - Index of entry within menu to center over (x,y).
- # If omitted or specified as {}, then the menu's
- # upper-left corner goes at (x,y).
- proc ::tk::PostOverPoint {menu x y {entry {}}} {
- global tcl_platform
-
- if {$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 $menu]/2}]
- }
- if {$tcl_platform(platform) eq "windows"} {
- # 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.
- set yoffset [expr {[winfo screenheight $menu]
- - $y - [winfo reqheight $menu] - 10}]
- if {$yoffset < 0} {
- # The bottom of the menu is offscreen, so adjust upwards
- incr y $yoffset
- if {$y < 0} { set y 0 }
- }
- # 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 < 0} {
- set y 0
- }
- }
- $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 $menu <<MenuSelect>>
- }
- # ::tk_popup --
- # This procedure pops up a menu and sets things up for traversing
- # the menu and its submenus.
- #
- # Arguments:
- # menu - Name of the menu to be popped up.
- # x, y - Root coordinates at which to pop up the
- # menu.
- # entry - Index of a menu entry to center over (x,y).
- # If omitted or specified as {}, then menu's
- # upper-left corner goes at (x,y).
- proc ::tk_popup {menu x y {entry {}}} {
- variable ::tk::Priv
- global tcl_platform
- if {$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
- tk_menuSetFocus $menu
- }
- }