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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 1.46.2.3 2006/01/25 18:21:41 dgp Exp $
#
# Copyright (c) 1992-1994 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
# Copyright (c) 1998-2000 Ajuba Solutions.
#
# 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 8.4
package require -exact Tcl 8.4
# Create a ::tk namespace
namespace eval ::tk {
# Set up the msgcat commands
namespace eval msgcat {
namespace export mc mcmax
if {[interp issafe] || [catch {package require msgcat}]} {
# The msgcat package is not available. Supply our own
# minimal replacement.
proc mc {src args} {
return [eval [list format $src] $args]
}
proc mcmax {args} {
set max 0
foreach string $args {
set len [string length $string]
if {$len>$max} {
set max $len
}
}
return $max
}
} else {
# Get the commands from the msgcat package that Tk uses.
namespace import ::msgcat::mc
namespace import ::msgcat::mcmax
::msgcat::mcload [file join $::tk_library msgs]
}
}
namespace import ::tk::msgcat::*
}
# 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] && $::tk_library ne "" && \
[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}
# ::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
set place_len [string length $place]
if {$place eq ""} {
set x [expr {([winfo screenwidth $w]-[winfo reqwidth $w])/2}]
set y [expr {([winfo screenheight $w]-[winfo reqheight $w])/2}]
set checkBounds 0
} elseif {[string equal -length $place_len $place "pointer"]} {
## place at POINTER (centered if $anchor == center)
if {[string equal -length [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 -length $place_len $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 $w])/2}]
set checkBounds 0
}
set windowingsystem [tk windowingsystem]
if {$windowingsystem eq "win32"} {
# Bug 533519: win32 multiple desktops may produce negative geometry.
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 $w]}]
}
if {$windowingsystem eq "macintosh" || $windowingsystem eq "aqua"} {
# Avoid the native menu bar which sits on top of everything.
if {$y < 20} { set y 20 }
}
}
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,$focus"
if {[info exists ::tk::FocusGrab($index)]} {
foreach {oldFocus oldGrab oldStatus} $::tk::FocusGrab($index) { break }
unset ::tk::FocusGrab($index)
} else {
set oldGrab ""
}
catch {focus $oldFocus}
grab release $grab
if {$destroy eq "withdraw"} {
wm withdraw $grab
} else {
destroy $grab
}
if {[winfo exists $oldGrab] && [winfo ismapped $oldGrab]} {
if {$oldStatus eq "global"} {
grab -global $oldGrab
} else {
grab $oldGrab
}
}
}
# ::tk::GetSelection --
# This tries to obtain the default selection. On Unix, we first try
# and get a UTF8_STRING, a type supported by modern Unix apps for
# passing Unicode data safely. We fall back on the default STRING
# type otherwise. On Windows, only the STRING type is necessary.
# Arguments:
# w The widget for which the selection will be retrieved.
# Important for the -displayof property.
# sel The source of the selection (PRIMARY or CLIPBOARD)
# Results:
# Returns the selection, or an error if none could be found
#
if {$tcl_platform(platform) eq "unix"} {
proc ::tk::GetSelection {w {sel PRIMARY}} {
if {[catch {selection get -displayof $w -selection $sel \
-type UTF8_STRING} txt] \
&& [catch {selection get -displayof $w -selection $sel} txt]} {
return -code error "could not find default selection"
} else {
return $txt
}
}
} else {
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
}
}
}
# ::tk::ScreenChanged --
# 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 variable "::tk::Priv" 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 ::tk::ScreenChanged screen {
set x [string last . $screen]
if {$x > 0} {
set disp [string range $screen 0 [expr {$x - 1}]]
} else {
set disp $screen
}
uplevel #0 upvar #0 ::tk::Priv.$disp ::tk::Priv
variable ::tk::Priv
global tcl_platform
if {[info exists Priv]} {
set Priv(screen) $screen
return
}
array set Priv {
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 Priv(screen) $screen
set Priv(tearoff) [string equal [tk windowingsystem] "x11"]
set Priv(window) {}
}
# Do initial setup for Priv, 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).
tk::ScreenChanged [winfo screen .]
# ::tk::EventMotifBindings --
# 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 ::tk::EventMotifBindings {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>
event $op <<Undo>> <Control-underscore>
}
#----------------------------------------------------------------------
# Define common dialogs on platforms where they are not implemented
# using compiled code.
#----------------------------------------------------------------------
if {[info commands tk_chooseColor] eq ""} {
proc ::tk_chooseColor {args} {
return [eval tk::dialog::color:: $args]
}
}
if {[info commands tk_getOpenFile] eq ""} {
proc ::tk_getOpenFile {args} {
if {$::tk_strictMotif} {
return [eval tk::MotifFDialog open $args]
} else {
return [eval ::tk::dialog::file:: open $args]
}
}
}
if {[info commands tk_getSaveFile] eq ""} {
proc ::tk_getSaveFile {args} {
if {$::tk_strictMotif} {
return [eval tk::MotifFDialog save $args]
} else {
return [eval ::tk::dialog::file:: save $args]
}
}
}
if {[info commands tk_messageBox] eq ""} {
proc ::tk_messageBox {args} {
return [eval tk::MessageBox $args]
}
}
if {[info command tk_chooseDirectory] eq ""} {
proc ::tk_chooseDirectory {args} {
return [eval ::tk::dialog::file::chooseDir:: $args]
}
}
#----------------------------------------------------------------------
# Define the set of common virtual events.
#----------------------------------------------------------------------
switch [tk windowingsystem] {
"x11" {
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>
event add <<Undo>> <Control-Key-z>
event add <<Redo>> <Control-Key-Z>
# 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.
# We use catch just in case the keysym isn't recognized.
# This is needed for XFree86 systems
catch { event add <<PrevWindow>> <ISO_Left_Tab> }
# This seems to be correct on *some* HP systems.
catch { event add <<PrevWindow>> <hpBackTab> }
trace add variable ::tk_strictMotif write ::tk::EventMotifBindings
set ::tk_strictMotif $::tk_strictMotif
}
"win32" {
event add <<Cut>> <Control-Key-x> <Shift-Key-Delete>
event add <<Copy>> <Control-Key-c> <Control-Key-Insert>
event add <<Paste>> <Control-Key-v> <Shift-Key-Insert>
event add <<PasteSelection>> <ButtonRelease-2>
event add <<Undo>> <Control-Key-z>
event add <<Redo>> <Control-Key-y>
}
"aqua" {
event add <<Cut>> <Command-Key-x> <Key-F2>
event add <<Copy>> <Command-Key-c> <Key-F3>
event add <<Paste>> <Command-Key-v> <Key-F4>
event add <<PasteSelection>> <ButtonRelease-2>
event add <<Clear>> <Clear>
event add <<Undo>> <Command-Key-z>
event add <<Redo>> <Command-Key-y>
}
"classic" {
event add <<Cut>> <Control-Key-x> <Key-F2>
event add <<Copy>> <Control-Key-c> <Key-F3>
event add <<Paste>> <Control-Key-v> <Key-F4>
event add <<PasteSelection>> <ButtonRelease-2>
event add <<Clear>> <Clear>
event add <<Undo>> <Control-Key-z> <Key-F1>
event add <<Redo>> <Control-Key-Z>
}
}
# ----------------------------------------------------------------------
# Read in files that define all of the class bindings.
# ----------------------------------------------------------------------
if {$::tk_library ne ""} {
if {$tcl_platform(platform) eq "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 or a spinbox, it selects the entire contents of the widget.
#
# Arguments:
# w - Window to which focus should be set.
proc ::tk::TabToWindow {w} {
set wclass [winfo class $w]
if {$wclass eq "Entry" || $wclass eq "Spinbox"} {
$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} $args {
if {$opt eq "-text"} {
foreach {newtext under} [::tk::UnderlineAmpersand $val] {
lappend wcmd -text $newtext -underline $under
}
} else {
lappend wcmd $opt $val
}
}
eval $wcmd
if {$class eq "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 {"" ne [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 eq ""} 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 {[tk windowingsystem] eq "aqua"} {
namespace eval ::tk::mac {
set useCustomMDEF 0
}
}
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