1357 lines
37 KiB
Tcl
1357 lines
37 KiB
Tcl
# menu.tcl --
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#
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# This file defines the default bindings for Tk menus and menubuttons.
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# It also implements keyboard traversal of menus and implements a few
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# other utility procedures related to menus.
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#
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# Copyright (c) 1992-1994 The Regents of the University of California.
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# Copyright (c) 1994-1997 Sun Microsystems, Inc.
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# Copyright (c) 1998-1999 by Scriptics Corporation.
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# Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net>
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#
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# See the file "license.terms" for information on usage and redistribution
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# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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#
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#-------------------------------------------------------------------------
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# Elements of tk::Priv that are used in this file:
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#
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# cursor - Saves the -cursor option for the posted menubutton.
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# focus - Saves the focus during a menu selection operation.
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# Focus gets restored here when the menu is unposted.
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# grabGlobal - Used in conjunction with tk::Priv(oldGrab): if
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# tk::Priv(oldGrab) is non-empty, then tk::Priv(grabGlobal)
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# contains either an empty string or "-global" to
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# indicate whether the old grab was a local one or
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# a global one.
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# inMenubutton - The name of the menubutton widget containing
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# the mouse, or an empty string if the mouse is
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# not over any menubutton.
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# menuBar - The name of the menubar that is the root
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# of the cascade hierarchy which is currently
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# posted. This is null when there is no menu currently
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# being pulled down from a menu bar.
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# oldGrab - Window that had the grab before a menu was posted.
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# Used to restore the grab state after the menu
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# is unposted. Empty string means there was no
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# grab previously set.
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# popup - If a menu has been popped up via tk_popup, this
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# gives the name of the menu. Otherwise this
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# value is empty.
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# postedMb - Name of the menubutton whose menu is currently
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# posted, or an empty string if nothing is posted
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# A grab is set on this widget.
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# relief - Used to save the original relief of the current
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# menubutton.
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# window - When the mouse is over a menu, this holds the
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# name of the menu; it's cleared when the mouse
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# leaves the menu.
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# tearoff - Whether the last menu posted was a tearoff or not.
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# This is true always for unix, for tearoffs for Mac
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# and Windows.
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# activeMenu - This is the last active menu for use
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# with the <<MenuSelect>> virtual event.
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# activeItem - This is the last active menu item for
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# use with the <<MenuSelect>> virtual event.
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#-------------------------------------------------------------------------
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#-------------------------------------------------------------------------
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# Overall note:
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# This file is tricky because there are five different ways that menus
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# can be used:
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#
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# 1. As a pulldown from a menubutton. In this style, the variable
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# tk::Priv(postedMb) identifies the posted menubutton.
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# 2. As a torn-off menu copied from some other menu. In this style
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# tk::Priv(postedMb) is empty, and menu's type is "tearoff".
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# 3. As an option menu, triggered from an option menubutton. In this
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# style tk::Priv(postedMb) identifies the posted menubutton.
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# 4. As a popup menu. In this style tk::Priv(postedMb) is empty and
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# the top-level menu's type is "normal".
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# 5. As a pulldown from a menubar. The variable tk::Priv(menubar) has
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# the owning menubar, and the menu itself is of type "normal".
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#
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# The various binding procedures use the state described above to
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# distinguish the various cases and take different actions in each
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# case.
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#-------------------------------------------------------------------------
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#-------------------------------------------------------------------------
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# The code below creates the default class bindings for menus
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# and menubuttons.
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#-------------------------------------------------------------------------
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bind Menubutton <FocusIn> {}
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bind Menubutton <Enter> {
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tk::MbEnter %W
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}
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bind Menubutton <Leave> {
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tk::MbLeave %W
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}
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bind Menubutton <1> {
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if {$tk::Priv(inMenubutton) ne ""} {
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tk::MbPost $tk::Priv(inMenubutton) %X %Y
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}
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}
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bind Menubutton <Motion> {
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tk::MbMotion %W up %X %Y
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}
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bind Menubutton <B1-Motion> {
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tk::MbMotion %W down %X %Y
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}
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bind Menubutton <ButtonRelease-1> {
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tk::MbButtonUp %W
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}
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bind Menubutton <space> {
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tk::MbPost %W
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tk::MenuFirstEntry [%W cget -menu]
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}
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bind Menubutton <<Invoke>> {
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tk::MbPost %W
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tk::MenuFirstEntry [%W cget -menu]
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}
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# Must set focus when mouse enters a menu, in order to allow
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# mixed-mode processing using both the mouse and the keyboard.
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# Don't set the focus if the event comes from a grab release,
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# though: such an event can happen after as part of unposting
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# a cascaded chain of menus, after the focus has already been
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# restored to wherever it was before menu selection started.
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bind Menu <FocusIn> {}
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bind Menu <Enter> {
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set tk::Priv(window) %W
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if {[%W cget -type] eq "tearoff"} {
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if {"%m" ne "NotifyUngrab"} {
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if {[tk windowingsystem] eq "x11"} {
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tk_menuSetFocus %W
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}
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}
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}
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tk::MenuMotion %W %x %y %s
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}
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bind Menu <Leave> {
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tk::MenuLeave %W %X %Y %s
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}
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bind Menu <Motion> {
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tk::MenuMotion %W %x %y %s
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}
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bind Menu <ButtonPress> {
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tk::MenuButtonDown %W
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}
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bind Menu <ButtonRelease> {
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tk::MenuInvoke %W 1
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}
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bind Menu <space> {
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tk::MenuInvoke %W 0
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}
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bind Menu <<Invoke>> {
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tk::MenuInvoke %W 0
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}
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bind Menu <Return> {
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tk::MenuInvoke %W 0
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}
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bind Menu <Escape> {
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tk::MenuEscape %W
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}
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bind Menu <<PrevChar>> {
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tk::MenuLeftArrow %W
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}
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bind Menu <<NextChar>> {
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tk::MenuRightArrow %W
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}
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bind Menu <<PrevLine>> {
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tk::MenuUpArrow %W
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}
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bind Menu <<NextLine>> {
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tk::MenuDownArrow %W
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}
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bind Menu <KeyPress> {
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tk::TraverseWithinMenu %W %A
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break
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}
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# The following bindings apply to all windows, and are used to
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# implement keyboard menu traversal.
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if {[tk windowingsystem] eq "x11"} {
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bind all <Alt-KeyPress> {
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tk::TraverseToMenu %W %A
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}
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bind all <F10> {
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tk::FirstMenu %W
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}
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} else {
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bind Menubutton <Alt-KeyPress> {
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tk::TraverseToMenu %W %A
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}
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bind Menubutton <F10> {
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tk::FirstMenu %W
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}
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}
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# ::tk::MbEnter --
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# This procedure is invoked when the mouse enters a menubutton
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# widget. It activates the widget unless it is disabled. Note:
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# this procedure is only invoked when mouse button 1 is *not* down.
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# The procedure ::tk::MbB1Enter is invoked if the button is down.
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#
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# Arguments:
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# w - The name of the widget.
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proc ::tk::MbEnter w {
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variable ::tk::Priv
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if {$Priv(inMenubutton) ne ""} {
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MbLeave $Priv(inMenubutton)
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}
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set Priv(inMenubutton) $w
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if {[$w cget -state] ne "disabled" && [tk windowingsystem] ne "aqua"} {
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$w configure -state active
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}
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}
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# ::tk::MbLeave --
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# This procedure is invoked when the mouse leaves a menubutton widget.
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# It de-activates the widget, if the widget still exists.
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#
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# Arguments:
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# w - The name of the widget.
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proc ::tk::MbLeave w {
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variable ::tk::Priv
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set Priv(inMenubutton) {}
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if {![winfo exists $w]} {
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return
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}
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if {[$w cget -state] eq "active" && [tk windowingsystem] ne "aqua"} {
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$w configure -state normal
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}
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}
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# ::tk::MbPost --
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# Given a menubutton, this procedure does all the work of posting
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# its associated menu and unposting any other menu that is currently
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# posted.
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#
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# Arguments:
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# w - The name of the menubutton widget whose menu
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# is to be posted.
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# x, y - Root coordinates of cursor, used for positioning
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# option menus. If not specified, then the center
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# of the menubutton is used for an option menu.
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proc ::tk::MbPost {w {x {}} {y {}}} {
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global errorInfo
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variable ::tk::Priv
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if {[$w cget -state] eq "disabled" || $w eq $Priv(postedMb)} {
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return
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}
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set menu [$w cget -menu]
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if {$menu eq ""} {
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return
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}
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set tearoff [expr {[tk windowingsystem] eq "x11" \
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|| [$menu cget -type] eq "tearoff"}]
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if {[string first $w $menu] != 0} {
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return -code error -errorcode {TK MENUBUTTON POST_NONCHILD} \
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"can't post $menu: it isn't a descendant of $w"
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}
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set cur $Priv(postedMb)
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if {$cur ne ""} {
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MenuUnpost {}
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}
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if {$::tk_strictMotif} {
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set Priv(cursor) [$w cget -cursor]
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$w configure -cursor arrow
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}
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if {[tk windowingsystem] ne "aqua"} {
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set Priv(relief) [$w cget -relief]
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$w configure -relief raised
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} else {
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$w configure -state active
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}
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set Priv(postedMb) $w
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set Priv(focus) [focus]
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$menu activate none
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GenerateMenuSelect $menu
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# If this looks like an option menubutton then post the menu so
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# that the current entry is on top of the mouse. Otherwise post
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# the menu just below the menubutton, as for a pull-down.
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update idletasks
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if {[catch {
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switch [$w cget -direction] {
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above {
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set x [winfo rootx $w]
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set y [expr {[winfo rooty $w] - [winfo reqheight $menu]}]
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# if we go offscreen to the top, show as 'below'
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if {$y < [winfo vrooty $w]} {
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set y [expr {[winfo vrooty $w] + [winfo rooty $w] + [winfo reqheight $w]}]
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}
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PostOverPoint $menu $x $y
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}
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below {
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set x [winfo rootx $w]
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set y [expr {[winfo rooty $w] + [winfo height $w]}]
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# if we go offscreen to the bottom, show as 'above'
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set mh [winfo reqheight $menu]
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if {($y + $mh) > ([winfo vrooty $w] + [winfo vrootheight $w])} {
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set y [expr {[winfo vrooty $w] + [winfo vrootheight $w] + [winfo rooty $w] - $mh}]
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}
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PostOverPoint $menu $x $y
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}
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left {
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set x [expr {[winfo rootx $w] - [winfo reqwidth $menu]}]
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set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}]
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set entry [MenuFindName $menu [$w cget -text]]
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if {$entry eq ""} {
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set entry 0
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}
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if {[$w cget -indicatoron]} {
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if {$entry == [$menu index last]} {
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incr y [expr {-([$menu yposition $entry] \
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+ [winfo reqheight $menu])/2}]
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} else {
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incr y [expr {-([$menu yposition $entry] \
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+ [$menu yposition [expr {$entry+1}]])/2}]
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}
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}
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PostOverPoint $menu $x $y
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if {$entry ne "" \
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&& [$menu entrycget $entry -state] ne "disabled"} {
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$menu activate $entry
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GenerateMenuSelect $menu
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}
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}
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right {
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set x [expr {[winfo rootx $w] + [winfo width $w]}]
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set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}]
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set entry [MenuFindName $menu [$w cget -text]]
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if {$entry eq ""} {
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set entry 0
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}
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if {[$w cget -indicatoron]} {
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if {$entry == [$menu index last]} {
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incr y [expr {-([$menu yposition $entry] \
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+ [winfo reqheight $menu])/2}]
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} else {
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incr y [expr {-([$menu yposition $entry] \
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+ [$menu yposition [expr {$entry+1}]])/2}]
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}
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}
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PostOverPoint $menu $x $y
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if {$entry ne "" \
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&& [$menu entrycget $entry -state] ne "disabled"} {
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$menu activate $entry
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GenerateMenuSelect $menu
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}
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}
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default {
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if {[$w cget -indicatoron]} {
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if {$y eq ""} {
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set x [expr {[winfo rootx $w] + [winfo width $w]/2}]
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set y [expr {[winfo rooty $w] + [winfo height $w]/2}]
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}
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PostOverPoint $menu $x $y [MenuFindName $menu [$w cget -text]]
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} else {
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PostOverPoint $menu [winfo rootx $w] [expr {[winfo rooty $w]+[winfo height $w]}]
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}
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}
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}
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} msg opt]} {
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# Error posting menu (e.g. bogus -postcommand). Unpost it and
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# reflect the error.
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MenuUnpost {}
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return -options $opt $msg
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}
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set Priv(tearoff) $tearoff
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if {$tearoff != 0} {
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focus $menu
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if {[winfo viewable $w]} {
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SaveGrabInfo $w
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grab -global $w
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}
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}
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}
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# ::tk::MenuUnpost --
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# This procedure unposts a given menu, plus all of its ancestors up
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# to (and including) a menubutton, if any. It also restores various
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# values to what they were before the menu was posted, and releases
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# a grab if there's a menubutton involved. Special notes:
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# 1. It's important to unpost all menus before releasing the grab, so
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# that any Enter-Leave events (e.g. from menu back to main
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# application) have mode NotifyGrab.
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# 2. Be sure to enclose various groups of commands in "catch" so that
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# the procedure will complete even if the menubutton or the menu
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# or the grab window has been deleted.
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#
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# Arguments:
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# menu - Name of a menu to unpost. Ignored if there
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# is a posted menubutton.
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proc ::tk::MenuUnpost menu {
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variable ::tk::Priv
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set mb $Priv(postedMb)
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# Restore focus right away (otherwise X will take focus away when
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# the menu is unmapped and under some window managers (e.g. olvwm)
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# we'll lose the focus completely).
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catch {focus $Priv(focus)}
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set Priv(focus) ""
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# Unpost menu(s) and restore some stuff that's dependent on
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# what was posted.
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after cancel [array get Priv menuActivatedTimer]
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unset -nocomplain Priv(menuActivated)
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after cancel [array get Priv menuDeactivatedTimer]
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unset -nocomplain Priv(menuDeactivated)
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catch {
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if {$mb ne ""} {
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set menu [$mb cget -menu]
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$menu unpost
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set Priv(postedMb) {}
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if {$::tk_strictMotif} {
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$mb configure -cursor $Priv(cursor)
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}
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if {[tk windowingsystem] ne "aqua"} {
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$mb configure -relief $Priv(relief)
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} else {
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$mb configure -state normal
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}
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} elseif {$Priv(popup) ne ""} {
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$Priv(popup) unpost
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set Priv(popup) {}
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} elseif {[$menu cget -type] ne "menubar" && [$menu cget -type] ne "tearoff"} {
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# We're in a cascaded sub-menu from a torn-off menu or popup.
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# Unpost all the menus up to the toplevel one (but not
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# including the top-level torn-off one) and deactivate the
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# top-level torn off menu if there is one.
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while {1} {
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set parent [winfo parent $menu]
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if {[winfo class $parent] ne "Menu" || ![winfo ismapped $parent]} {
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break
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}
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$parent activate none
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$parent postcascade none
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GenerateMenuSelect $parent
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set type [$parent cget -type]
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if {$type eq "menubar" || $type eq "tearoff"} {
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break
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}
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set menu $parent
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}
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if {[$menu cget -type] ne "menubar"} {
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$menu unpost
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}
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}
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}
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if {($Priv(tearoff) != 0) || $Priv(menuBar) ne ""} {
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# Release grab, if any, and restore the previous grab, if there
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# was one.
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if {$menu ne ""} {
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set grab [grab current $menu]
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if {$grab ne ""} {
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grab release $grab
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}
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}
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RestoreOldGrab
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if {$Priv(menuBar) ne ""} {
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if {$::tk_strictMotif} {
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$Priv(menuBar) configure -cursor $Priv(cursor)
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}
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set Priv(menuBar) {}
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}
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if {[tk windowingsystem] ne "x11"} {
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set Priv(tearoff) 0
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}
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}
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}
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# ::tk::MbMotion --
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# This procedure handles mouse motion events inside menubuttons, and
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# also outside menubuttons when a menubutton has a grab (e.g. when a
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# menu selection operation is in progress).
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#
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# Arguments:
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# w - The name of the menubutton widget.
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# upDown - "down" means button 1 is pressed, "up" means
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# it isn't.
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# rootx, rooty - Coordinates of mouse, in (virtual?) root window.
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proc ::tk::MbMotion {w upDown rootx rooty} {
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variable ::tk::Priv
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if {$Priv(inMenubutton) eq $w} {
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return
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}
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set new [winfo containing $rootx $rooty]
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if {$new ne $Priv(inMenubutton) \
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&& ($new eq "" || [winfo toplevel $new] eq [winfo toplevel $w])} {
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if {$Priv(inMenubutton) ne ""} {
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MbLeave $Priv(inMenubutton)
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}
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|
if {$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"} {
|
|
if {[$menu cget -type] ne "menubar" } {
|
|
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
|
|
}
|
|
}
|