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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.
- #
- # SCCS: @(#) menu.tcl 1.103 97/10/31 15:26:08
- #
- # Copyright (c) 1992-1994 The Regents of the University of California.
- # Copyright (c) 1994-1997 Sun Microsystems, Inc.
- #
- # See the file "license.terms" for information on usage and redistribution
- # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- #
-
- #-------------------------------------------------------------------------
- # Elements of tkPriv 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 tkPriv(oldGrab): if
- # tkPriv(oldGrab) is non-empty, then tkPriv(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
- # tkPriv(postedMb) identifies the posted menubutton.
- # 2. As a torn-off menu copied from some other menu. In this style
- # tkPriv(postedMb) is empty, and menu's type is "tearoff".
- # 3. As an option menu, triggered from an option menubutton. In this
- # style tkPriv(postedMb) identifies the posted menubutton.
- # 4. As a popup menu. In this style tkPriv(postedMb) is empty and
- # the top-level menu's type is "normal".
- # 5. As a pulldown from a menubar. The variable tkPriv(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> {
- tkMbEnter %W
- }
- bind Menubutton <Leave> {
- tkMbLeave %W
- }
- bind Menubutton <1> {
- if {$tkPriv(inMenubutton) != ""} {
- tkMbPost $tkPriv(inMenubutton) %X %Y
- }
- }
- bind Menubutton <Motion> {
- tkMbMotion %W up %X %Y
- }
- bind Menubutton <B1-Motion> {
- tkMbMotion %W down %X %Y
- }
- bind Menubutton <ButtonRelease-1> {
- tkMbButtonUp %W
- }
- bind Menubutton <space> {
- tkMbPost %W
- tkMenuFirstEntry [%W cget -menu]
- }
-
- # Must set focus when mouse enters a menu, in order to allow
- # mixed-mode processing using both the mouse and the keyboard.
- # Don't set the focus if the event comes from a grab release,
- # though: such an event can happen after as part of unposting
- # a cascaded chain of menus, after the focus has already been
- # restored to wherever it was before menu selection started.
-
- bind Menu <FocusIn> {}
-
- bind Menu <Enter> {
- set tkPriv(window) %W
- if {[%W cget -type] == "tearoff"} {
- if {"%m" != "NotifyUngrab"} {
- if {$tcl_platform(platform) == "unix"} {
- tk_menuSetFocus %W
- }
- }
- }
- tkMenuMotion %W %x %y %s
- }
-
- bind Menu <Leave> {
- tkMenuLeave %W %X %Y %s
- }
- bind Menu <Motion> {
- tkMenuMotion %W %x %y %s
- }
- bind Menu <ButtonPress> {
- tkMenuButtonDown %W
- }
- bind Menu <ButtonRelease> {
- tkMenuInvoke %W 1
- }
- bind Menu <space> {
- tkMenuInvoke %W 0
- }
- bind Menu <Return> {
- tkMenuInvoke %W 0
- }
- bind Menu <Escape> {
- tkMenuEscape %W
- }
- bind Menu <Left> {
- tkMenuLeftArrow %W
- }
- bind Menu <Right> {
- tkMenuRightArrow %W
- }
- bind Menu <Up> {
- tkMenuUpArrow %W
- }
- bind Menu <Down> {
- tkMenuDownArrow %W
- }
- bind Menu <KeyPress> {
- tkTraverseWithinMenu %W %A
- }
-
- # The following bindings apply to all windows, and are used to
- # implement keyboard menu traversal.
-
- if {$tcl_platform(platform) == "unix"} {
- bind all <Alt-KeyPress> {
- tkTraverseToMenu %W %A
- }
-
- bind all <F10> {
- tkFirstMenu %W
- }
- } else {
- bind Menubutton <Alt-KeyPress> {
- tkTraverseToMenu %W %A
- }
-
- bind Menubutton <F10> {
- tkFirstMenu %W
- }
- }
-
- # tkMbEnter --
- # This procedure is invoked when the mouse enters a menubutton
- # widget. It activates the widget unless it is disabled. Note:
- # this procedure is only invoked when mouse button 1 is *not* down.
- # The procedure tkMbB1Enter is invoked if the button is down.
- #
- # Arguments:
- # w - The name of the widget.
-
- proc tkMbEnter w {
- global tkPriv
-
- if {$tkPriv(inMenubutton) != ""} {
- tkMbLeave $tkPriv(inMenubutton)
- }
- set tkPriv(inMenubutton) $w
- if {[$w cget -state] != "disabled"} {
- $w configure -state active
- }
- }
-
- # tkMbLeave --
- # 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 tkMbLeave w {
- global tkPriv
-
- set tkPriv(inMenubutton) {}
- if ![winfo exists $w] {
- return
- }
- if {[$w cget -state] == "active"} {
- $w configure -state normal
- }
- }
-
- # tkMbPost --
- # Given a menubutton, this procedure does all the work of posting
- # its associated menu and unposting any other menu that is currently
- # posted.
- #
- # Arguments:
- # w - The name of the menubutton widget whose menu
- # is to be posted.
- # x, y - Root coordinates of cursor, used for positioning
- # option menus. If not specified, then the center
- # of the menubutton is used for an option menu.
-
- proc tkMbPost {w {x {}} {y {}}} {
- global tkPriv errorInfo
- global tcl_platform
-
- if {([$w cget -state] == "disabled") || ($w == $tkPriv(postedMb))} {
- return
- }
- set menu [$w cget -menu]
- if {$menu == ""} {
- return
- }
- set tearoff [expr {($tcl_platform(platform) == "unix") \
- || ([$menu cget -type] == "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 $tkPriv(postedMb)
- if {$cur != ""} {
- tkMenuUnpost {}
- }
- set tkPriv(cursor) [$w cget -cursor]
- set tkPriv(relief) [$w cget -relief]
- $w configure -cursor arrow
- $w configure -relief raised
-
- set tkPriv(postedMb) $w
- set tkPriv(focus) [focus]
- $menu activate none
- tkGenerateMenuSelect $menu
-
- # If this looks like an option menubutton then post the menu so
- # that the current entry is on top of the mouse. Otherwise post
- # the menu just below the menubutton, as for a pull-down.
-
- update idletasks
- if [catch {
- switch [$w cget -direction] {
- above {
- set x [winfo rootx $w]
- set y [expr [winfo rooty $w] - [winfo reqheight $menu]]
- $menu post $x $y
- }
- below {
- set x [winfo rootx $w]
- set y [expr [winfo rooty $w] + [winfo height $w]]
- $menu post $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 [tkMenuFindName $menu [$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]
- }
- }
- $menu post $x $y
- if {($entry != {}) && ([$menu entrycget $entry -state] != "disabled")} {
- $menu activate $entry
- tkGenerateMenuSelect $menu
- }
- }
- right {
- set x [expr [winfo rootx $w] + [winfo width $w]]
- set y [expr (2 * [winfo rooty $w] + [winfo height $w]) / 2]
- set entry [tkMenuFindName $menu [$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]
- }
- }
- $menu post $x $y
- if {($entry != {}) && ([$menu entrycget $entry -state] != "disabled")} {
- $menu activate $entry
- tkGenerateMenuSelect $menu
- }
- }
- default {
- if [$w cget -indicatoron] {
- if {$y == ""} {
- set x [expr [winfo rootx $w] + [winfo width $w]/2]
- set y [expr [winfo rooty $w] + [winfo height $w]/2]
- }
- tkPostOverPoint $menu $x $y [tkMenuFindName $menu [$w cget -text]]
- } else {
- $menu post [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
- tkMenuUnpost {}
- error $msg $savedInfo
-
- }
-
- set tkPriv(tearoff) $tearoff
- if {$tearoff != 0} {
- focus $menu
- tkSaveGrabInfo $w
- grab -global $w
- }
- }
-
- # tkMenuUnpost --
- # 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 tkMenuUnpost menu {
- global tcl_platform
- global tkPriv
- set mb $tkPriv(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 $tkPriv(focus)}
- set tkPriv(focus) ""
-
- # Unpost menu(s) and restore some stuff that's dependent on
- # what was posted.
-
- catch {
- if {$mb != ""} {
- set menu [$mb cget -menu]
- $menu unpost
- set tkPriv(postedMb) {}
- $mb configure -cursor $tkPriv(cursor)
- $mb configure -relief $tkPriv(relief)
- } elseif {$tkPriv(popup) != ""} {
- $tkPriv(popup) unpost
- set tkPriv(popup) {}
- } elseif {(!([$menu cget -type] == "menubar")
- && !([$menu cget -type] == "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] != "Menu")
- || ![winfo ismapped $parent]} {
- break
- }
- $parent activate none
- $parent postcascade none
- tkGenerateMenuSelect $parent
- set type [$parent cget -type]
- if {($type == "menubar")|| ($type == "tearoff")} {
- break
- }
- set menu $parent
- }
- if {[$menu cget -type] != "menubar"} {
- $menu unpost
- }
- }
- }
-
- if {($tkPriv(tearoff) != 0) || ($tkPriv(menuBar) != "")} {
- # Release grab, if any, and restore the previous grab, if there
- # was one.
-
- if {$menu != ""} {
- set grab [grab current $menu]
- if {$grab != ""} {
- grab release $grab
- }
- }
- tkRestoreOldGrab
- if {$tkPriv(menuBar) != ""} {
- $tkPriv(menuBar) configure -cursor $tkPriv(cursor)
- set tkPriv(menuBar) {}
- }
- if {$tcl_platform(platform) != "unix"} {
- set tkPriv(tearoff) 0
- }
- }
- }
-
- # tkMbMotion --
- # 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 tkMbMotion {w upDown rootx rooty} {
- global tkPriv
-
- if {$tkPriv(inMenubutton) == $w} {
- return
- }
- set new [winfo containing $rootx $rooty]
- if {($new != $tkPriv(inMenubutton)) && (($new == "")
- || ([winfo toplevel $new] == [winfo toplevel $w]))} {
- if {$tkPriv(inMenubutton) != ""} {
- tkMbLeave $tkPriv(inMenubutton)
- }
- if {($new != "") && ([winfo class $new] == "Menubutton")
- && ([$new cget -indicatoron] == 0)
- && ([$w cget -indicatoron] == 0)} {
- if {$upDown == "down"} {
- tkMbPost $new $rootx $rooty
- } else {
- tkMbEnter $new
- }
- }
- }
- }
-
- # tkMbButtonUp --
- # This procedure is invoked to handle button 1 releases for menubuttons.
- # If the release happens inside the menubutton then leave its menu
- # posted with element 0 activated. Otherwise, unpost the menu.
- #
- # Arguments:
- # w - The name of the menubutton widget.
-
- proc tkMbButtonUp w {
- global tkPriv
- global tcl_platform
-
- set tearoff [expr {($tcl_platform(platform) == "unix") \
- || ([[$w cget -menu] cget -type] == "tearoff")}]
- if {($tearoff != 0) && ($tkPriv(postedMb) == $w)
- && ($tkPriv(inMenubutton) == $w)} {
- tkMenuFirstEntry [$tkPriv(postedMb) cget -menu]
- } else {
- tkMenuUnpost {}
- }
- }
-
- # tkMenuMotion --
- # 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 tkMenuMotion {menu x y state} {
- global tkPriv
- if {$menu == $tkPriv(window)} {
- if {[$menu cget -type] == "menubar"} {
- if {[info exists tkPriv(focus)] && \
- ([string compare $menu $tkPriv(focus)] != 0)} {
- $menu activate @$x,$y
- tkGenerateMenuSelect $menu
- }
- } else {
- $menu activate @$x,$y
- tkGenerateMenuSelect $menu
- }
- }
- if {($state & 0x1f00) != 0} {
- $menu postcascade active
- }
- }
-
- # tkMenuButtonDown --
- # 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 tkMenuButtonDown menu {
- global tkPriv
- global tcl_platform
- $menu postcascade active
- if {$tkPriv(postedMb) != ""} {
- grab -global $tkPriv(postedMb)
- } else {
- while {([$menu cget -type] == "normal")
- && ([winfo class [winfo parent $menu]] == "Menu")
- && [winfo ismapped [winfo parent $menu]]} {
- set menu [winfo parent $menu]
- }
-
- if {$tkPriv(menuBar) == {}} {
- set tkPriv(menuBar) $menu
- set tkPriv(cursor) [$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 != [grab current $menu]} {
- tkSaveGrabInfo $menu
- }
-
- # Must re-grab even if the grab window hasn't changed, in order
- # to release the implicit grab from the button press.
-
- if {$tcl_platform(platform) == "unix"} {
- grab -global $menu
- }
- }
- }
-
- # tkMenuLeave --
- # This procedure is invoked to handle Leave events for a menu. It
- # deactivates everything unless the active element is a cascade element
- # and the mouse is now over the submenu.
- #
- # Arguments:
- # menu - The menu window.
- # rootx, rooty - Root coordinates of mouse.
- # state - Modifier state.
-
- proc tkMenuLeave {menu rootx rooty state} {
- global tkPriv
- set tkPriv(window) {}
- if {[$menu index active] == "none"} {
- return
- }
- if {([$menu type active] == "cascade")
- && ([winfo containing $rootx $rooty]
- == [$menu entrycget active -menu])} {
- return
- }
- $menu activate none
- tkGenerateMenuSelect $menu
- }
-
- # tkMenuInvoke --
- # This procedure is invoked when button 1 is released over a menu.
- # It invokes the appropriate menu action and unposts the menu if
- # it came from a menubutton.
- #
- # Arguments:
- # w - Name of the menu widget.
- # buttonRelease - 1 means this procedure is called because of
- # a button release; 0 means because of keystroke.
-
- proc tkMenuInvoke {w buttonRelease} {
- global tkPriv
-
- if {$buttonRelease && ($tkPriv(window) == "")} {
- # 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>>
- tkMenuUnpost $w
- return
- }
- if {[$w type active] == "cascade"} {
- $w postcascade active
- set menu [$w entrycget active -menu]
- tkMenuFirstEntry $menu
- } elseif {[$w type active] == "tearoff"} {
- tkMenuUnpost $w
- tkTearOffMenu $w
- } elseif {[$w cget -type] == "menubar"} {
- $w postcascade none
- $w activate none
- event generate $w <<MenuSelect>>
- tkMenuUnpost $w
- } else {
- tkMenuUnpost $w
- uplevel #0 [list $w invoke active]
- }
- }
-
- # tkMenuEscape --
- # 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 tkMenuEscape menu {
- set parent [winfo parent $menu]
- if {([winfo class $parent] != "Menu")} {
- tkMenuUnpost $menu
- } elseif {([$parent cget -type] == "menubar")} {
- tkMenuUnpost $menu
- tkRestoreOldGrab
- } else {
- tkMenuNextMenu $menu left
- }
- }
-
- # The following routines handle arrow keys. Arrow keys behave
- # differently depending on whether the menu is a menu bar or not.
-
- proc tkMenuUpArrow {menu} {
- if {[$menu cget -type] == "menubar"} {
- tkMenuNextMenu $menu left
- } else {
- tkMenuNextEntry $menu -1
- }
- }
-
- proc tkMenuDownArrow {menu} {
- if {[$menu cget -type] == "menubar"} {
- tkMenuNextMenu $menu right
- } else {
- tkMenuNextEntry $menu 1
- }
- }
-
- proc tkMenuLeftArrow {menu} {
- if {[$menu cget -type] == "menubar"} {
- tkMenuNextEntry $menu -1
- } else {
- tkMenuNextMenu $menu left
- }
- }
-
- proc tkMenuRightArrow {menu} {
- if {[$menu cget -type] == "menubar"} {
- tkMenuNextEntry $menu 1
- } else {
- tkMenuNextMenu $menu right
- }
- }
-
- # tkMenuNextMenu --
- # This procedure is invoked to handle "left" and "right" traversal
- # motions in menus. It traverses to the next menu in a menu bar,
- # or into or out of a cascaded menu.
- #
- # Arguments:
- # menu - The menu that received the keyboard
- # event.
- # direction - Direction in which to move: "left" or "right"
-
- proc tkMenuNextMenu {menu direction} {
- global tkPriv
-
- # First handle traversals into and out of cascaded menus.
-
- if {$direction == "right"} {
- set count 1
- set parent [winfo parent $menu]
- set class [winfo class $parent]
- if {[$menu type active] == "cascade"} {
- $menu postcascade active
- set m2 [$menu entrycget active -menu]
- if {$m2 != ""} {
- tkMenuFirstEntry $m2
- }
- return
- } else {
- set parent [winfo parent $menu]
- while {($parent != ".")} {
- if {([winfo class $parent] == "Menu")
- && ([$parent cget -type] == "menubar")} {
- tk_menuSetFocus $parent
- tkMenuNextEntry $parent 1
- return
- }
- set parent [winfo parent $parent]
- }
- }
- } else {
- set count -1
- set m2 [winfo parent $menu]
- if {[winfo class $m2] == "Menu"} {
- if {[$m2 cget -type] != "menubar"} {
- $menu activate none
- tkGenerateMenuSelect $menu
- tk_menuSetFocus $m2
-
- # This code unposts any posted submenu in the parent.
-
- set tmp [$m2 index active]
- $m2 activate none
- $m2 activate $tmp
- 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 $m2] == "Menu"} {
- if {[$m2 cget -type] == "menubar"} {
- tk_menuSetFocus $m2
- tkMenuNextEntry $m2 -1
- return
- }
- }
-
- set w $tkPriv(postedMb)
- if {$w == ""} {
- 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 $mb] == "Menubutton")
- && ([$mb cget -state] != "disabled")
- && ([$mb cget -menu] != "")
- && ([[$mb cget -menu] index last] != "none")} {
- break
- }
- if {$mb == $w} {
- return
- }
- incr i $count
- }
- tkMbPost $mb
- tkMenuFirstEntry [$mb cget -menu]
- }
-
- # tkMenuNextEntry --
- # 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 tkMenuNextEntry {menu count} {
- global tkPriv
-
- if {[$menu index last] == "none"} {
- return
- }
- set length [expr [$menu index last]+1]
- set quitAfter $length
- set active [$menu index active]
- if {$active == "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 != "disabled"} {
- break
- }
- }
- if {$i == $active} {
- return
- }
- incr i $count
- incr quitAfter -1
- }
- $menu activate $i
- tkGenerateMenuSelect $menu
- if {[$menu type $i] == "cascade"} {
- set cascade [$menu entrycget $i -menu]
- if {[string compare $cascade ""] != 0} {
- $menu postcascade $i
- tkMenuFirstEntry $cascade
- }
- }
- }
-
- # tkMenuFind --
- # 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 tkMenuFind {w char} {
- global tkPriv
- set char [string tolower $char]
- set windowlist [winfo child $w]
-
- foreach child $windowlist {
- switch [winfo class $child] {
- Menu {
- if {[$child cget -type] == "menubar"} {
- if {$char == ""} {
- return $child
- }
- set last [$child index last]
- for {set i [$child cget -tearoff]} {$i <= $last} {incr i} {
- if {[$child type $i] == "separator"} {
- continue
- }
- set char2 [string index [$child entrycget $i -label] \
- [$child entrycget $i -underline]]
- if {([string compare $char [string tolower $char2]] \
- == 0) || ($char == "")} {
- if {[$child entrycget $i -state] != "disabled"} {
- return $child
- }
- }
- }
- }
- }
- }
- }
-
- foreach child $windowlist {
- switch [winfo class $child] {
- Menubutton {
- set char2 [string index [$child cget -text] \
- [$child cget -underline]]
- if {([string compare $char [string tolower $char2]] == 0)
- || ($char == "")} {
- if {[$child cget -state] != "disabled"} {
- return $child
- }
- }
- }
-
- default {
- set match [tkMenuFind $child $char]
- if {$match != ""} {
- return $match
- }
- }
- }
- }
- return {}
- }
-
- # tkTraverseToMenu --
- # This procedure implements keyboard traversal of menus. Given an
- # ASCII character "char", it looks for a menubutton with that character
- # underlined. If one is found, it posts the menubutton's menu
- #
- # Arguments:
- # w - Window in which the key was typed (selects
- # a toplevel window).
- # char - Character that selects a menu. The case
- # is ignored. If an empty string, nothing
- # happens.
-
- proc tkTraverseToMenu {w char} {
- global tkPriv
- if {$char == ""} {
- return
- }
- while {[winfo class $w] == "Menu"} {
- if {([$w cget -type] != "menubar") && ($tkPriv(postedMb) == "")} {
- return
- }
- if {[$w cget -type] == "menubar"} {
- break
- }
- set w [winfo parent $w]
- }
- set w [tkMenuFind [winfo toplevel $w] $char]
- if {$w != ""} {
- if {[winfo class $w] == "Menu"} {
- tk_menuSetFocus $w
- set tkPriv(window) $w
- tkSaveGrabInfo $w
- grab -global $w
- tkTraverseWithinMenu $w $char
- } else {
- tkMbPost $w
- tkMenuFirstEntry [$w cget -menu]
- }
- }
- }
-
- # tkFirstMenu --
- # 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 tkFirstMenu w {
- set w [tkMenuFind [winfo toplevel $w] ""]
- if {$w != ""} {
- if {[winfo class $w] == "Menu"} {
- tk_menuSetFocus $w
- set tkPriv(window) $w
- tkSaveGrabInfo $w
- grab -global $w
- tkMenuFirstEntry $w
- } else {
- tkMbPost $w
- tkMenuFirstEntry [$w cget -menu]
- }
- }
- }
-
- # tkTraverseWithinMenu
- # 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 tkTraverseWithinMenu {w char} {
- if {$char == ""} {
- return
- }
- set char [string tolower $char]
- set last [$w index last]
- if {$last == "none"} {
- return
- }
- for {set i 0} {$i <= $last} {incr i} {
- if [catch {set char2 [string index \
- [$w entrycget $i -label] \
- [$w entrycget $i -underline]]}] {
- continue
- }
- if {[string compare $char [string tolower $char2]] == 0} {
- if {[$w type $i] == "cascade"} {
- $w activate $i
- $w postcascade active
- event generate $w <<MenuSelect>>
- set m2 [$w entrycget $i -menu]
- if {$m2 != ""} {
- tkMenuFirstEntry $m2
- }
- } else {
- tkMenuUnpost $w
- uplevel #0 [list $w invoke $i]
- }
- return
- }
- }
- }
-
- # tkMenuFirstEntry --
- # Given a menu, this procedure finds the first entry that isn't
- # disabled or a tear-off or separator, and activates that entry.
- # However, if there is already an active entry in the menu (e.g.,
- # because of a previous call to tkPostOverPoint) then the active
- # entry isn't changed. This procedure also sets the input focus
- # to the menu.
- #
- # Arguments:
- # menu - Name of the menu window (possibly empty).
-
- proc tkMenuFirstEntry menu {
- if {$menu == ""} {
- return
- }
- tk_menuSetFocus $menu
- if {[$menu index active] != "none"} {
- return
- }
- set last [$menu index last]
- if {$last == "none"} {
- return
- }
- for {set i 0} {$i <= $last} {incr i} {
- if {([catch {set state [$menu entrycget $i -state]}] == 0)
- && ($state != "disabled") && ([$menu type $i] != "tearoff")} {
- $menu activate $i
- tkGenerateMenuSelect $menu
- if {[$menu type $i] == "cascade"} {
- set cascade [$menu entrycget $i -menu]
- if {[string compare $cascade ""] != 0} {
- $menu postcascade $i
- tkMenuFirstEntry $cascade
- }
- }
- return
- }
- }
- }
-
- # tkMenuFindName --
- # Given a menu and a text string, return the index of the menu entry
- # that displays the string as its label. If there is no such entry,
- # return an empty string. This procedure is tricky because some names
- # like "active" have a special meaning in menu commands, so we can't
- # always use the "index" widget command.
- #
- # Arguments:
- # menu - Name of the menu widget.
- # s - String to look for.
-
- proc tkMenuFindName {menu s} {
- set i ""
- if {![regexp {^active$|^last$|^none$|^[0-9]|^@} $s]} {
- catch {set i [$menu index $s]}
- return $i
- }
- set last [$menu index last]
- if {$last == "none"} {
- return
- }
- for {set i 0} {$i <= $last} {incr i} {
- if ![catch {$menu entrycget $i -label} label] {
- if {$label == $s} {
- return $i
- }
- }
- }
- return ""
- }
-
- # tkPostOverPoint --
- # This procedure posts a given menu such that a given entry in the
- # menu is centered over a given point in the root window. It also
- # activates the given entry.
- #
- # Arguments:
- # menu - Menu to post.
- # x, y - Root coordinates of point.
- # entry - Index of entry within menu to center over (x,y).
- # If omitted or specified as {}, then the menu's
- # upper-left corner goes at (x,y).
-
- proc tkPostOverPoint {menu x y {entry {}}} {
- global tcl_platform
-
- if {$entry != {}} {
- 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]
- }
- $menu post $x $y
- if {($entry != {}) && ([$menu entrycget $entry -state] != "disabled")} {
- $menu activate $entry
- tkGenerateMenuSelect $menu
- }
- }
-
- # tkSaveGrabInfo --
- # Sets the variables tkPriv(oldGrab) and tkPriv(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 tkSaveGrabInfo w {
- global tkPriv
- set tkPriv(oldGrab) [grab current $w]
- if {$tkPriv(oldGrab) != ""} {
- set tkPriv(grabStatus) [grab status $tkPriv(oldGrab)]
- }
- }
-
- # tkRestoreOldGrab --
- # Restores the grab to what it was before TkSaveGrabInfo was called.
- #
-
- proc tkRestoreOldGrab {} {
- global tkPriv
-
- if {$tkPriv(oldGrab) != ""} {
-
- # Be careful restoring the old grab, since it's window may not
- # be visible anymore.
-
- catch {
- if {$tkPriv(grabStatus) == "global"} {
- grab set -global $tkPriv(oldGrab)
- } else {
- grab set $tkPriv(oldGrab)
- }
- }
- set tkPriv(oldGrab) ""
- }
- }
-
- proc tk_menuSetFocus {menu} {
- global tkPriv
- if {![info exists tkPriv(focus)] || [string length $tkPriv(focus)] == 0} {
- set tkPriv(focus) [focus]
- }
- focus $menu
- }
-
- proc tkGenerateMenuSelect {menu} {
- global tkPriv
-
- if {([string compare $tkPriv(activeMenu) $menu] == 0) \
- && ([string compare $tkPriv(activeItem) [$menu index active]] \
- == 0)} {
- return
- }
-
- set tkPriv(activeMenu) $menu
- set tkPriv(activeItem) [$menu index active]
- event generate $menu <<MenuSelect>>
- }
-
- # tk_popup --
- # This procedure pops up a menu and sets things up for traversing
- # the menu and its submenus.
- #
- # Arguments:
- # menu - Name of the menu to be popped up.
- # x, y - Root coordinates at which to pop up the
- # menu.
- # entry - Index of a menu entry to center over (x,y).
- # If omitted or specified as {}, then menu's
- # upper-left corner goes at (x,y).
-
- proc tk_popup {menu x y {entry {}}} {
- global tkPriv
- global tcl_platform
- if {($tkPriv(popup) != "") || ($tkPriv(postedMb) != "")} {
- tkMenuUnpost {}
- }
- tkPostOverPoint $menu $x $y $entry
- if {$tcl_platform(platform) == "unix"} {
- tkSaveGrabInfo $menu
- grab -global $menu
- set tkPriv(popup) $menu
- tk_menuSetFocus $menu
- }
- }
-