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575 lines
16 KiB
Tcl
575 lines
16 KiB
Tcl
15 years ago
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# tk.tcl --
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#
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# Initialization script normally executed in the interpreter for each
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# Tk-based application. Arranges class bindings for widgets.
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#
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# RCS: @(#) $Id: tk.tcl,v 1.45 2002/10/10 16:34:51 hobbs Exp $
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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) 1994-1996 Sun Microsystems, Inc.
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# Copyright (c) 1998-2000 Ajuba Solutions.
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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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# Insist on running with compatible versions of Tcl and Tk.
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package require -exact Tk 8.4
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package require -exact Tcl 8.4
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# Create a ::tk namespace
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namespace eval ::tk {
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# Set up the msgcat commands
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namespace eval msgcat {
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namespace export mc mcmax
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if {[interp issafe] || [catch {package require msgcat}]} {
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# The msgcat package is not available. Supply our own
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# minimal replacement.
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proc mc {src args} {
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return [eval [list format $src] $args]
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}
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proc mcmax {args} {
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set max 0
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foreach string $args {
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set len [string length $string]
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if {$len>$max} {
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set max $len
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}
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}
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return $max
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}
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} else {
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# Get the commands from the msgcat package that Tk uses.
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namespace import ::msgcat::mc
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namespace import ::msgcat::mcmax
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::msgcat::mcload [file join $::tk_library msgs]
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}
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}
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namespace import ::tk::msgcat::*
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}
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# Add Tk's directory to the end of the auto-load search path, if it
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# isn't already on the path:
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if {[info exists ::auto_path] && [string compare {} $::tk_library] && \
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[lsearch -exact $::auto_path $::tk_library] < 0} {
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lappend ::auto_path $::tk_library
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}
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# Turn off strict Motif look and feel as a default.
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set ::tk_strictMotif 0
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# Turn on useinputmethods (X Input Methods) by default.
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# We catch this because safe interpreters may not allow the call.
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catch {tk useinputmethods 1}
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# ::tk::PlaceWindow --
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# place a toplevel at a particular position
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# Arguments:
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# toplevel name of toplevel window
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# ?placement? pointer ?center? ; places $w centered on the pointer
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# widget widgetPath ; centers $w over widget_name
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# defaults to placing toplevel in the middle of the screen
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# ?anchor? center or widgetPath
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# Results:
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# Returns nothing
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#
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proc ::tk::PlaceWindow {w {place ""} {anchor ""}} {
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wm withdraw $w
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update idletasks
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set checkBounds 1
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if {[string equal -len [string length $place] $place "pointer"]} {
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## place at POINTER (centered if $anchor == center)
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if {[string equal -len [string length $anchor] $anchor "center"]} {
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set x [expr {[winfo pointerx $w]-[winfo reqwidth $w]/2}]
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set y [expr {[winfo pointery $w]-[winfo reqheight $w]/2}]
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} else {
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set x [winfo pointerx $w]
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set y [winfo pointery $w]
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}
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} elseif {[string equal -len [string length $place] $place "widget"] && \
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[winfo exists $anchor] && [winfo ismapped $anchor]} {
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## center about WIDGET $anchor, widget must be mapped
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set x [expr {[winfo rootx $anchor] + \
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([winfo width $anchor]-[winfo reqwidth $w])/2}]
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set y [expr {[winfo rooty $anchor] + \
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([winfo height $anchor]-[winfo reqheight $w])/2}]
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} else {
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set x [expr {([winfo screenwidth $w]-[winfo reqwidth $w])/2}]
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set y [expr {([winfo screenheight $w]-[winfo reqheight $w])/2}]
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set checkBounds 0
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}
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if {$checkBounds} {
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if {$x < 0} {
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set x 0
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} elseif {$x > ([winfo screenwidth $w]-[winfo reqwidth $w])} {
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set x [expr {[winfo screenwidth $w]-[winfo reqwidth $w]}]
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}
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if {$y < 0} {
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set y 0
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} elseif {$y > ([winfo screenheight $w]-[winfo reqheight $w])} {
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set y [expr {[winfo screenheight $w]-[winfo reqheight $w]}]
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}
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if {[tk windowingsystem] eq "macintosh" \
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|| [tk windowingsystem] eq "aqua"} {
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# Avoid the native menu bar which sits on top of everything.
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if {$y < 20} { set y 20 }
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}
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}
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wm geometry $w +$x+$y
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wm deiconify $w
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}
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# ::tk::SetFocusGrab --
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# swap out current focus and grab temporarily (for dialogs)
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# Arguments:
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# grab new window to grab
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# focus window to give focus to
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# Results:
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# Returns nothing
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#
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proc ::tk::SetFocusGrab {grab {focus {}}} {
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set index "$grab,$focus"
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upvar ::tk::FocusGrab($index) data
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lappend data [focus]
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set oldGrab [grab current $grab]
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lappend data $oldGrab
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if {[winfo exists $oldGrab]} {
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lappend data [grab status $oldGrab]
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}
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# The "grab" command will fail if another application
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# already holds the grab. So catch it.
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catch {grab $grab}
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if {[winfo exists $focus]} {
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focus $focus
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}
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}
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# ::tk::RestoreFocusGrab --
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# restore old focus and grab (for dialogs)
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# Arguments:
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# grab window that had taken grab
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# focus window that had taken focus
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# destroy destroy|withdraw - how to handle the old grabbed window
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# Results:
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# Returns nothing
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#
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proc ::tk::RestoreFocusGrab {grab focus {destroy destroy}} {
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set index "$grab,$focus"
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if {[info exists ::tk::FocusGrab($index)]} {
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foreach {oldFocus oldGrab oldStatus} $::tk::FocusGrab($index) { break }
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unset ::tk::FocusGrab($index)
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} else {
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set oldGrab ""
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}
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catch {focus $oldFocus}
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grab release $grab
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if {[string equal $destroy "withdraw"]} {
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wm withdraw $grab
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} else {
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destroy $grab
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}
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if {[winfo exists $oldGrab] && [winfo ismapped $oldGrab]} {
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if {[string equal $oldStatus "global"]} {
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grab -global $oldGrab
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} else {
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grab $oldGrab
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}
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}
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}
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# ::tk::GetSelection --
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# This tries to obtain the default selection. On Unix, we first try
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# and get a UTF8_STRING, a type supported by modern Unix apps for
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# passing Unicode data safely. We fall back on the default STRING
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# type otherwise. On Windows, only the STRING type is necessary.
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# Arguments:
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# w The widget for which the selection will be retrieved.
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# Important for the -displayof property.
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# sel The source of the selection (PRIMARY or CLIPBOARD)
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# Results:
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# Returns the selection, or an error if none could be found
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#
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if {[string equal $tcl_platform(platform) "unix"]} {
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proc ::tk::GetSelection {w {sel PRIMARY}} {
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if {[catch {selection get -displayof $w -selection $sel \
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-type UTF8_STRING} txt] \
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&& [catch {selection get -displayof $w -selection $sel} txt]} {
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return -code error "could not find default selection"
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} else {
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return $txt
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}
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}
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} else {
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proc ::tk::GetSelection {w {sel PRIMARY}} {
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if {[catch {selection get -displayof $w -selection $sel} txt]} {
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return -code error "could not find default selection"
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} else {
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return $txt
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}
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}
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}
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# ::tk::ScreenChanged --
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# This procedure is invoked by the binding mechanism whenever the
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# "current" screen is changing. The procedure does two things.
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# First, it uses "upvar" to make variable "::tk::Priv" point at an
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# array variable that holds state for the current display. Second,
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# it initializes the array if it didn't already exist.
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#
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# Arguments:
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# screen - The name of the new screen.
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proc ::tk::ScreenChanged screen {
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set x [string last . $screen]
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if {$x > 0} {
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set disp [string range $screen 0 [expr {$x - 1}]]
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} else {
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set disp $screen
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}
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uplevel #0 upvar #0 ::tk::Priv.$disp ::tk::Priv
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variable ::tk::Priv
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global tcl_platform
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if {[info exists Priv]} {
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set Priv(screen) $screen
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return
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}
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array set Priv {
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activeMenu {}
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activeItem {}
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afterId {}
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buttons 0
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buttonWindow {}
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dragging 0
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focus {}
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grab {}
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initPos {}
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inMenubutton {}
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listboxPrev {}
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menuBar {}
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mouseMoved 0
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oldGrab {}
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popup {}
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postedMb {}
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pressX 0
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pressY 0
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prevPos 0
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selectMode char
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}
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set Priv(screen) $screen
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set Priv(tearoff) [string equal [tk windowingsystem] "x11"]
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set Priv(window) {}
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}
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# Do initial setup for Priv, so that it is always bound to something
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# (otherwise, if someone references it, it may get set to a non-upvar-ed
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# value, which will cause trouble later).
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tk::ScreenChanged [winfo screen .]
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# ::tk::EventMotifBindings --
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# This procedure is invoked as a trace whenever ::tk_strictMotif is
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# changed. It is used to turn on or turn off the motif virtual
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# bindings.
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#
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# Arguments:
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# n1 - the name of the variable being changed ("::tk_strictMotif").
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proc ::tk::EventMotifBindings {n1 dummy dummy} {
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upvar $n1 name
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if {$name} {
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set op delete
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} else {
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set op add
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}
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event $op <<Cut>> <Control-Key-w>
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event $op <<Copy>> <Meta-Key-w>
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event $op <<Paste>> <Control-Key-y>
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event $op <<Undo>> <Control-underscore>
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}
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#----------------------------------------------------------------------
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# Define common dialogs on platforms where they are not implemented
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# using compiled code.
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#----------------------------------------------------------------------
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if {[string equal [info commands tk_chooseColor] ""]} {
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proc ::tk_chooseColor {args} {
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return [eval tk::dialog::color:: $args]
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}
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}
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if {[string equal [info commands tk_getOpenFile] ""]} {
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proc ::tk_getOpenFile {args} {
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if {$::tk_strictMotif} {
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return [eval tk::MotifFDialog open $args]
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} else {
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return [eval ::tk::dialog::file:: open $args]
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}
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}
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}
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if {[string equal [info commands tk_getSaveFile] ""]} {
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proc ::tk_getSaveFile {args} {
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if {$::tk_strictMotif} {
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return [eval tk::MotifFDialog save $args]
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} else {
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return [eval ::tk::dialog::file:: save $args]
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}
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}
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}
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if {[string equal [info commands tk_messageBox] ""]} {
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proc ::tk_messageBox {args} {
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return [eval tk::MessageBox $args]
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}
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}
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if {[string equal [info command tk_chooseDirectory] ""]} {
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proc ::tk_chooseDirectory {args} {
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return [eval ::tk::dialog::file::chooseDir:: $args]
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}
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}
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#----------------------------------------------------------------------
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# Define the set of common virtual events.
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#----------------------------------------------------------------------
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switch [tk windowingsystem] {
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"x11" {
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event add <<Cut>> <Control-Key-x> <Key-F20>
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event add <<Copy>> <Control-Key-c> <Key-F16>
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event add <<Paste>> <Control-Key-v> <Key-F18>
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event add <<PasteSelection>> <ButtonRelease-2>
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event add <<Undo>> <Control-Key-z>
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event add <<Redo>> <Control-Key-Z>
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# Some OS's define a goofy (as in, not <Shift-Tab>) keysym
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# that is returned when the user presses <Shift-Tab>. In order for
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# tab traversal to work, we have to add these keysyms to the
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# PrevWindow event.
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# We use catch just in case the keysym isn't recognized.
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# This is needed for XFree86 systems
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catch { event add <<PrevWindow>> <ISO_Left_Tab> }
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# This seems to be correct on *some* HP systems.
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catch { event add <<PrevWindow>> <hpBackTab> }
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trace variable ::tk_strictMotif w ::tk::EventMotifBindings
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set ::tk_strictMotif $::tk_strictMotif
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}
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"win32" {
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event add <<Cut>> <Control-Key-x> <Shift-Key-Delete>
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event add <<Copy>> <Control-Key-c> <Control-Key-Insert>
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event add <<Paste>> <Control-Key-v> <Shift-Key-Insert>
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event add <<PasteSelection>> <ButtonRelease-2>
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event add <<Undo>> <Control-Key-z>
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event add <<Redo>> <Control-Key-y>
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}
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"aqua" {
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event add <<Cut>> <Command-Key-x> <Key-F2>
|
||
|
|
event add <<Copy>> <Command-Key-c> <Key-F3>
|
||
|
|
event add <<Paste>> <Command-Key-v> <Key-F4>
|
||
|
|
event add <<PasteSelection>> <ButtonRelease-2>
|
||
|
|
event add <<Clear>> <Clear>
|
||
|
|
event add <<Undo>> <Command-Key-z>
|
||
|
|
event add <<Redo>> <Command-Key-y>
|
||
|
|
}
|
||
|
|
"classic" {
|
||
|
|
event add <<Cut>> <Control-Key-x> <Key-F2>
|
||
|
|
event add <<Copy>> <Control-Key-c> <Key-F3>
|
||
|
|
event add <<Paste>> <Control-Key-v> <Key-F4>
|
||
|
|
event add <<PasteSelection>> <ButtonRelease-2>
|
||
|
|
event add <<Clear>> <Clear>
|
||
|
|
event add <<Undo>> <Control-Key-z> <Key-F1>
|
||
|
|
event add <<Redo>> <Control-Key-Z>
|
||
|
|
}
|
||
|
|
}
|
||
|
|
# ----------------------------------------------------------------------
|
||
|
|
# Read in files that define all of the class bindings.
|
||
|
|
# ----------------------------------------------------------------------
|
||
|
|
|
||
|
|
if {$::tk_library ne ""} {
|
||
|
|
if {[string equal $tcl_platform(platform) "macintosh"]} {
|
||
|
|
proc ::tk::SourceLibFile {file} {
|
||
|
|
if {[catch {
|
||
|
|
namespace eval :: \
|
||
|
|
[list source [file join $::tk_library $file.tcl]]
|
||
|
|
}]} {
|
||
|
|
namespace eval :: [list source -rsrc $file]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
proc ::tk::SourceLibFile {file} {
|
||
|
|
namespace eval :: [list source [file join $::tk_library $file.tcl]]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
namespace eval ::tk {
|
||
|
|
SourceLibFile button
|
||
|
|
SourceLibFile entry
|
||
|
|
SourceLibFile listbox
|
||
|
|
SourceLibFile menu
|
||
|
|
SourceLibFile panedwindow
|
||
|
|
SourceLibFile scale
|
||
|
|
SourceLibFile scrlbar
|
||
|
|
SourceLibFile spinbox
|
||
|
|
SourceLibFile text
|
||
|
|
}
|
||
|
|
}
|
||
|
|
# ----------------------------------------------------------------------
|
||
|
|
# Default bindings for keyboard traversal.
|
||
|
|
# ----------------------------------------------------------------------
|
||
|
|
|
||
|
|
event add <<PrevWindow>> <Shift-Tab>
|
||
|
|
bind all <Tab> {tk::TabToWindow [tk_focusNext %W]}
|
||
|
|
bind all <<PrevWindow>> {tk::TabToWindow [tk_focusPrev %W]}
|
||
|
|
|
||
|
|
# ::tk::CancelRepeat --
|
||
|
|
# This procedure is invoked to cancel an auto-repeat action described
|
||
|
|
# by ::tk::Priv(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 ::tk::CancelRepeat {} {
|
||
|
|
variable ::tk::Priv
|
||
|
|
after cancel $Priv(afterId)
|
||
|
|
set Priv(afterId) {}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::TabToWindow --
|
||
|
|
# 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 ::tk::TabToWindow {w} {
|
||
|
|
if {[string equal [winfo class $w] Entry]} {
|
||
|
|
$w selection range 0 end
|
||
|
|
$w icursor end
|
||
|
|
}
|
||
|
|
focus $w
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::UnderlineAmpersand --
|
||
|
|
# This procedure takes some text with ampersand and returns
|
||
|
|
# text w/o ampersand and position of the ampersand.
|
||
|
|
# Double ampersands are converted to single ones.
|
||
|
|
# Position returned is -1 when there is no ampersand.
|
||
|
|
#
|
||
|
|
proc ::tk::UnderlineAmpersand {text} {
|
||
|
|
set idx [string first "&" $text]
|
||
|
|
if {$idx >= 0} {
|
||
|
|
set underline $idx
|
||
|
|
# ignore "&&"
|
||
|
|
while {[string match "&" [string index $text [expr {$idx + 1}]]]} {
|
||
|
|
set base [expr {$idx + 2}]
|
||
|
|
set idx [string first "&" [string range $text $base end]]
|
||
|
|
if {$idx < 0} {
|
||
|
|
break
|
||
|
|
} else {
|
||
|
|
set underline [expr {$underline + $idx + 1}]
|
||
|
|
incr idx $base
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if {$idx >= 0} {
|
||
|
|
regsub -all -- {&([^&])} $text {\1} text
|
||
|
|
}
|
||
|
|
return [list $text $idx]
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::SetAmpText --
|
||
|
|
# Given widget path and text with "magic ampersands",
|
||
|
|
# sets -text and -underline options for the widget
|
||
|
|
#
|
||
|
|
proc ::tk::SetAmpText {widget text} {
|
||
|
|
foreach {newtext under} [::tk::UnderlineAmpersand $text] {
|
||
|
|
$widget configure -text $newtext -underline $under
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::AmpWidget --
|
||
|
|
# Creates new widget, turning -text option into -text and
|
||
|
|
# -underline options, returned by ::tk::UnderlineAmpersand.
|
||
|
|
#
|
||
|
|
proc ::tk::AmpWidget {class path args} {
|
||
|
|
set wcmd [list $class $path]
|
||
|
|
foreach {opt val} $args {
|
||
|
|
if {[string equal $opt {-text}]} {
|
||
|
|
foreach {newtext under} [::tk::UnderlineAmpersand $val] {
|
||
|
|
lappend wcmd -text $newtext -underline $under
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
lappend wcmd $opt $val
|
||
|
|
}
|
||
|
|
}
|
||
|
|
eval $wcmd
|
||
|
|
if {$class=="button"} {
|
||
|
|
bind $path <<AltUnderlined>> [list $path invoke]
|
||
|
|
}
|
||
|
|
return $path
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::FindAltKeyTarget --
|
||
|
|
# search recursively through the hierarchy of visible widgets
|
||
|
|
# to find button or label which has $char as underlined character
|
||
|
|
#
|
||
|
|
proc ::tk::FindAltKeyTarget {path char} {
|
||
|
|
switch [winfo class $path] {
|
||
|
|
Button -
|
||
|
|
Label {
|
||
|
|
if {[string equal -nocase $char \
|
||
|
|
[string index [$path cget -text] \
|
||
|
|
[$path cget -underline]]]} {return $path} else {return {}}
|
||
|
|
}
|
||
|
|
default {
|
||
|
|
foreach child \
|
||
|
|
[concat [grid slaves $path] \
|
||
|
|
[pack slaves $path] \
|
||
|
|
[place slaves $path] ] {
|
||
|
|
if {""!=[set target [::tk::FindAltKeyTarget $child $char]]} {
|
||
|
|
return $target
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return {}
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::AltKeyInDialog --
|
||
|
|
# <Alt-Key> event handler for standard dialogs. Sends <<AltUnderlined>>
|
||
|
|
# to button or label which has appropriate underlined character
|
||
|
|
#
|
||
|
|
proc ::tk::AltKeyInDialog {path key} {
|
||
|
|
set target [::tk::FindAltKeyTarget $path $key]
|
||
|
|
if { $target == ""} return
|
||
|
|
event generate $target <<AltUnderlined>>
|
||
|
|
}
|
||
|
|
|
||
|
|
# ::tk::mcmaxamp --
|
||
|
|
# Replacement for mcmax, used for texts with "magic ampersand" in it.
|
||
|
|
#
|
||
|
|
|
||
|
|
proc ::tk::mcmaxamp {args} {
|
||
|
|
set maxlen 0
|
||
|
|
foreach arg $args {
|
||
|
|
set length [string length [lindex [::tk::UnderlineAmpersand [mc $arg]] 0]]
|
||
|
|
if {$length>$maxlen} {
|
||
|
|
set maxlen $length
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return $maxlen
|
||
|
|
}
|
||
|
|
# For now, turn off the custom mdef proc for the mac:
|
||
|
|
|
||
|
|
if {[string equal [tk windowingsystem] "aqua"]} {
|
||
|
|
namespace eval ::tk::mac {
|
||
|
|
set useCustomMDEF 0
|
||
|
|
}
|
||
|
|
}
|