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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 1.5 1998/11/12 06:22:05 welch Exp $
#
# Copyright (c) 1992-1994 The Regents of the University of California.
# Copyright (c) 1994-1996 Sun Microsystems, Inc.
#
# 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 8.0
package require -exact Tcl 8.0
# 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]} {
if {[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
# 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
}
set tkPriv(activeMenu) {}
set tkPriv(activeItem) {}
set tkPriv(afterId) {}
set tkPriv(buttons) 0
set tkPriv(buttonWindow) {}
set tkPriv(dragging) 0
set tkPriv(focus) {}
set tkPriv(grab) {}
set tkPriv(initPos) {}
set tkPriv(inMenubutton) {}
set tkPriv(listboxPrev) {}
set tkPriv(menuBar) {}
set tkPriv(mouseMoved) 0
set tkPriv(oldGrab) {}
set tkPriv(popup) {}
set tkPriv(postedMb) {}
set tkPriv(pressX) 0
set tkPriv(pressY) 0
set tkPriv(prevPos) 0
set tkPriv(screen) $screen
set tkPriv(selectMode) char
if {[string compare $tcl_platform(platform) "unix"] == 0} {
set tkPriv(tearoff) 1
} else {
set tkPriv(tearoff) 0
}
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 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>
trace variable tk_strictMotif w tkEventMotifBindings
set tk_strictMotif $tk_strictMotif
}
"windows" {
event add <<Cut>> <Control-Key-x> <Shift-Key-Delete>
event add <<Copy>> <Control-Key-c> <Control-Key-Insert>
event add <<Paste>> <Control-Key-v> <Shift-Key-Insert>
event add <<PasteSelection>> <ButtonRelease-2>
}
"macintosh" {
event add <<Cut>> <Control-Key-x> <Key-F2>
event add <<Copy>> <Control-Key-c> <Key-F3>
event add <<Paste>> <Control-Key-v> <Key-F4>
event add <<PasteSelection>> <ButtonRelease-2>
event add <<Clear>> <Clear>
}
}
# ----------------------------------------------------------------------
# Read in files that define all of the class bindings.
# ----------------------------------------------------------------------
if {$tcl_platform(platform) != "macintosh"} {
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.
# ----------------------------------------------------------------------
bind all <Tab> {tkTabToWindow [tk_focusNext %W]}
bind all <Shift-Tab> {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 {"[winfo class $w]" == "Entry"} {
$w select range 0 end
$w icur end
}
focus $w
}
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