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- # tk.tcl --
- #
- # Initialization script normally executed in the interpreter for each
- # Tk-based application. Arranges class bindings for widgets.
- #
- # RCS: @(#) $Id: tk.tcl,v 1.20.2.2 2001/10/19 17:33:00 hobbs Exp $
- #
- # Copyright (c) 1992-1994 The Regents of the University of California.
- # Copyright (c) 1994-1996 Sun Microsystems, Inc.
- # Copyright (c) 1998-2000 Scriptics Corporation.
- #
- # See the file "license.terms" for information on usage and redistribution
- # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-
- # Insist on running with compatible versions of Tcl and Tk.
-
- package require -exact Tk 8.3
- package require -exact Tcl 8.3
-
- # Add Tk's directory to the end of the auto-load search path, if it
- # isn't already on the path:
-
- if {[info exists auto_path] && [string compare {} $tk_library] && \
- [lsearch -exact $auto_path $tk_library] < 0} {
- lappend auto_path $tk_library
- }
-
- # Turn off strict Motif look and feel as a default.
-
- set tk_strictMotif 0
-
- # Turn on useinputmethods (X Input Methods) by default.
- # We catch this because safe interpreters may not allow the call.
-
- catch {tk useinputmethods 1}
-
- # Create a ::tk namespace
-
- namespace eval ::tk {
- }
-
- # ::tk::PlaceWindow --
- # place a toplevel at a particular position
- # Arguments:
- # toplevel name of toplevel window
- # ?placement? pointer ?center? ; places $w centered on the pointer
- # widget widgetPath ; centers $w over widget_name
- # defaults to placing toplevel in the middle of the screen
- # ?anchor? center or widgetPath
- # Results:
- # Returns nothing
- #
- proc ::tk::PlaceWindow {w {place ""} {anchor ""}} {
- wm withdraw $w
- update idletasks
- set checkBounds 1
- if {[string equal -len [string length $place] $place "pointer"]} {
- ## place at POINTER (centered if $anchor == center)
- if {[string equal -len [string length $anchor] $anchor "center"]} {
- set x [expr {[winfo pointerx $w]-[winfo reqwidth $w]/2}]
- set y [expr {[winfo pointery $w]-[winfo reqheight $w]/2}]
- } else {
- set x [winfo pointerx $w]
- set y [winfo pointery $w]
- }
- } elseif {[string equal -len [string length $place] $place "widget"] && \
- [winfo exists $anchor] && [winfo ismapped $anchor]} {
- ## center about WIDGET $anchor, widget must be mapped
- set x [expr {[winfo rootx $anchor] + \
- ([winfo width $anchor]-[winfo reqwidth $w])/2}]
- set y [expr {[winfo rooty $anchor] + \
- ([winfo height $anchor]-[winfo reqheight $w])/2}]
- } else {
- set x [expr {([winfo screenwidth $w]-[winfo reqwidth $w])/2}]
- set y [expr {([winfo screenheight $w]-[winfo reqheight $w])/2}]
- set checkBounds 0
- }
- if {$checkBounds} {
- if {$x < 0} {
- set x 0
- } elseif {$x > ([winfo screenwidth $w]-[winfo reqwidth $w])} {
- set x [expr {[winfo screenwidth $w]-[winfo reqwidth $w]}]
- }
- if {$y < 0} {
- set y 0
- } elseif {$y > ([winfo screenheight $w]-[winfo reqheight $w])} {
- set y [expr {[winfo screenheight $w]-[winfo reqheight $w]}]
- }
- }
- wm geometry $w +$x+$y
- wm deiconify $w
- }
-
- # ::tk::SetFocusGrab --
- # swap out current focus and grab temporarily (for dialogs)
- # Arguments:
- # grab new window to grab
- # focus window to give focus to
- # Results:
- # Returns nothing
- #
- proc ::tk::SetFocusGrab {grab {focus {}}} {
- set index "$grab,$focus"
- upvar ::tk::FocusGrab($index) data
-
- lappend data [focus]
- set oldGrab [grab current $grab]
- lappend data $oldGrab
- if {[winfo exists $oldGrab]} {
- lappend data [grab status $oldGrab]
- }
- # The "grab" command will fail if another application
- # already holds the grab. So catch it.
- catch {grab $grab}
- if {[winfo exists $focus]} {
- focus $focus
- }
- }
-
- # ::tk::RestoreFocusGrab --
- # restore old focus and grab (for dialogs)
- # Arguments:
- # grab window that had taken grab
- # focus window that had taken focus
- # destroy destroy|withdraw - how to handle the old grabbed window
- # Results:
- # Returns nothing
- #
- proc ::tk::RestoreFocusGrab {grab focus {destroy destroy}} {
- set index "$grab,$focus"
- foreach {oldFocus oldGrab oldStatus} $::tk::FocusGrab($index) { break }
- unset ::tk::FocusGrab($index)
-
- catch {focus $oldFocus}
- grab release $grab
- if {[string equal $destroy "withdraw"]} {
- wm withdraw $grab
- } else {
- destroy $grab
- }
- if {[winfo exists $oldGrab] && [winfo ismapped $oldGrab]} {
- if {[string equal $oldStatus "global"]} {
- grab -global $oldGrab
- } else {
- grab $oldGrab
- }
- }
- }
-
- # ::tk::GetSelection --
- # This tries to obtain the default selection.
- # This shadows the 8.4 version which handles UTF8_STRING as well.
- # Arguments:
- # w The widget for which the selection will be retrieved.
- # Important for the -displayof property.
- # sel The source of the selection (PRIMARY or CLIPBOARD)
- # Results:
- # Returns the selection, or an error if none could be found
- #
- proc ::tk::GetSelection {w {sel PRIMARY}} {
- if {[catch {selection get -displayof $w -selection $sel} txt]} {
- return -code error "could not find default selection"
- } else {
- return $txt
- }
- }
-
- # tkScreenChanged --
- # This procedure is invoked by the binding mechanism whenever the
- # "current" screen is changing. The procedure does two things.
- # First, it uses "upvar" to make global variable "tkPriv" point at an
- # array variable that holds state for the current display. Second,
- # it initializes the array if it didn't already exist.
- #
- # Arguments:
- # screen - The name of the new screen.
-
- proc tkScreenChanged screen {
- set x [string last . $screen]
- if {$x > 0} {
- set disp [string range $screen 0 [expr {$x - 1}]]
- } else {
- set disp $screen
- }
-
- uplevel #0 upvar #0 tkPriv.$disp tkPriv
- global tkPriv
- global tcl_platform
-
- if {[info exists tkPriv]} {
- set tkPriv(screen) $screen
- return
- }
- array set tkPriv {
- activeMenu {}
- activeItem {}
- afterId {}
- buttons 0
- buttonWindow {}
- dragging 0
- focus {}
- grab {}
- initPos {}
- inMenubutton {}
- listboxPrev {}
- menuBar {}
- mouseMoved 0
- oldGrab {}
- popup {}
- postedMb {}
- pressX 0
- pressY 0
- prevPos 0
- selectMode char
- }
- set tkPriv(screen) $screen
- set tkPriv(tearoff) [string equal $tcl_platform(platform) "unix"]
- set tkPriv(window) {}
- }
-
- # Do initial setup for tkPriv, so that it is always bound to something
- # (otherwise, if someone references it, it may get set to a non-upvar-ed
- # value, which will cause trouble later).
-
- tkScreenChanged [winfo screen .]
-
- # tkEventMotifBindings --
- # This procedure is invoked as a trace whenever tk_strictMotif is
- # changed. It is used to turn on or turn off the motif virtual
- # bindings.
- #
- # Arguments:
- # n1 - the name of the variable being changed ("tk_strictMotif").
-
- proc tkEventMotifBindings {n1 dummy dummy} {
- upvar $n1 name
-
- if {$name} {
- set op delete
- } else {
- set op add
- }
-
- event $op <<Cut>> <Control-Key-w>
- event $op <<Copy>> <Meta-Key-w>
- event $op <<Paste>> <Control-Key-y>
- }
-
- #----------------------------------------------------------------------
- # Define common dialogs on platforms where they are not implemented
- # using compiled code.
- #----------------------------------------------------------------------
-
- if {[string equal [info commands tk_chooseColor] ""]} {
- proc tk_chooseColor {args} {
- return [eval tkColorDialog $args]
- }
- }
- if {[string equal [info commands tk_getOpenFile] ""]} {
- proc tk_getOpenFile {args} {
- if {$::tk_strictMotif} {
- return [eval tkMotifFDialog open $args]
- } else {
- return [eval ::tk::dialog::file::tkFDialog open $args]
- }
- }
- }
- if {[string equal [info commands tk_getSaveFile] ""]} {
- proc tk_getSaveFile {args} {
- if {$::tk_strictMotif} {
- return [eval tkMotifFDialog save $args]
- } else {
- return [eval ::tk::dialog::file::tkFDialog save $args]
- }
- }
- }
- if {[string equal [info commands tk_messageBox] ""]} {
- proc tk_messageBox {args} {
- return [eval tkMessageBox $args]
- }
- }
- if {[string equal [info command tk_chooseDirectory] ""]} {
- proc tk_chooseDirectory {args} {
- return [eval ::tk::dialog::file::chooseDir::tkChooseDirectory $args]
- }
- }
-
- #----------------------------------------------------------------------
- # Define the set of common virtual events.
- #----------------------------------------------------------------------
-
- switch $tcl_platform(platform) {
- "unix" {
- event add <<Cut>> <Control-Key-x> <Key-F20>
- event add <<Copy>> <Control-Key-c> <Key-F16>
- event add <<Paste>> <Control-Key-v> <Key-F18>
- event add <<PasteSelection>> <ButtonRelease-2>
- # Some OS's define a goofy (as in, not <Shift-Tab>) keysym
- # that is returned when the user presses <Shift-Tab>. In order for
- # tab traversal to work, we have to add these keysyms to the
- # PrevWindow event.
- # The info exists is necessary, because tcl_platform(os) doesn't
- # exist in safe interpreters.
- if {[info exists tcl_platform(os)]} {
- switch $tcl_platform(os) {
- "IRIX" -
- "Linux" { event add <<PrevWindow>> <ISO_Left_Tab> }
- "HP-UX" {
- # This seems to be correct on *some* HP systems.
- catch { event add <<PrevWindow>> <hpBackTab> }
- }
- }
- }
- trace variable tk_strictMotif w tkEventMotifBindings
- set tk_strictMotif $tk_strictMotif
- }
- "windows" {
- event add <<Cut>> <Control-Key-x> <Shift-Key-Delete>
- event add <<Copy>> <Control-Key-c> <Control-Key-Insert>
- event add <<Paste>> <Control-Key-v> <Shift-Key-Insert>
- event add <<PasteSelection>> <ButtonRelease-2>
- }
- "macintosh" {
- event add <<Cut>> <Control-Key-x> <Key-F2>
- event add <<Copy>> <Control-Key-c> <Key-F3>
- event add <<Paste>> <Control-Key-v> <Key-F4>
- event add <<PasteSelection>> <ButtonRelease-2>
- event add <<Clear>> <Clear>
- }
- }
-
- # ----------------------------------------------------------------------
- # Read in files that define all of the class bindings.
- # ----------------------------------------------------------------------
-
- if {[string compare $tcl_platform(platform) "macintosh"] && \
- [string compare {} $tk_library]} {
- source [file join $tk_library button.tcl]
- source [file join $tk_library entry.tcl]
- source [file join $tk_library listbox.tcl]
- source [file join $tk_library menu.tcl]
- source [file join $tk_library scale.tcl]
- source [file join $tk_library scrlbar.tcl]
- source [file join $tk_library text.tcl]
- }
-
- # ----------------------------------------------------------------------
- # Default bindings for keyboard traversal.
- # ----------------------------------------------------------------------
-
- event add <<PrevWindow>> <Shift-Tab>
- bind all <Tab> {tkTabToWindow [tk_focusNext %W]}
- bind all <<PrevWindow>> {tkTabToWindow [tk_focusPrev %W]}
-
- # tkCancelRepeat --
- # This procedure is invoked to cancel an auto-repeat action described
- # by tkPriv(afterId). It's used by several widgets to auto-scroll
- # the widget when the mouse is dragged out of the widget with a
- # button pressed.
- #
- # Arguments:
- # None.
-
- proc tkCancelRepeat {} {
- global tkPriv
- after cancel $tkPriv(afterId)
- set tkPriv(afterId) {}
- }
-
- # tkTabToWindow --
- # This procedure moves the focus to the given widget. If the widget
- # is an entry, it selects the entire contents of the widget.
- #
- # Arguments:
- # w - Window to which focus should be set.
-
- proc tkTabToWindow {w} {
- if {[string equal [winfo class $w] Entry]} {
- $w selection range 0 end
- $w icursor end
- }
- focus $w
- }
-