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# dialog.tcl --
#
# This file defines the procedure tk_dialog, which creates a dialog
# box containing a bitmap, a message, and one or more buttons.
#
# Copyright (c) 1992-1993 The Regents of the University of California.
# Copyright (c) 1994-1997 Sun Microsystems, Inc.
#
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
#
# ::tk_dialog:
#
# This procedure displays a dialog box, waits for a button in the dialog
# to be invoked, then returns the index of the selected button. If the
# dialog somehow gets destroyed, -1 is returned.
#
# Arguments:
# w - Window to use for dialog top-level.
# title - Title to display in dialog's decorative frame.
# text - Message to display in dialog.
# bitmap - Bitmap to display in dialog (empty string means none).
# default - Index of button that is to display the default ring
# (-1 means none).
# args - One or more strings to display in buttons across the
# bottom of the dialog box.
proc ::tk_dialog {w title text bitmap default args} {
global tcl_platform
variable ::tk::Priv
# Check that $default was properly given
if {[string is integer -strict $default]} {
if {$default >= [llength $args]} {
return -code error "default button index greater than number of\
buttons specified for tk_dialog"
}
} elseif {"" eq $default} {
set default -1
} else {
set default [lsearch -exact $args $default]
}
set windowingsystem [tk windowingsystem]
if {$windowingsystem eq "aqua"} {
option add *Dialog*background systemDialogBackgroundActive widgetDefault
option add *Dialog*Button.highlightBackground \
systemDialogBackgroundActive widgetDefault
}
# 1. Create the top-level window and divide it into top
# and bottom parts.
destroy $w
toplevel $w -class Dialog
wm title $w $title
wm iconname $w Dialog
wm protocol $w WM_DELETE_WINDOW { }
# Dialog boxes should be transient with respect to their parent,
# so that they will always stay on top of their parent window. However,
# some window managers will create the window as withdrawn if the parent
# window is withdrawn or iconified. Combined with the grab we put on the
# window, this can hang the entire application. Therefore we only make
# the dialog transient if the parent is viewable.
#
if {[winfo viewable [winfo toplevel [winfo parent $w]]] } {
wm transient $w [winfo toplevel [winfo parent $w]]
}
if {$windowingsystem eq "aqua"} {
::tk::unsupported::MacWindowStyle style $w moveableModal {}
} elseif {$windowingsystem eq "x11"} {
wm attributes $w -type dialog
}
frame $w.bot
frame $w.top
if {$windowingsystem eq "x11"} {
$w.bot configure -relief raised -bd 1
$w.top configure -relief raised -bd 1
}
pack $w.bot -side bottom -fill both
pack $w.top -side top -fill both -expand 1
grid anchor $w.bot center
# 2. Fill the top part with bitmap and message (use the option
# database for -wraplength and -font so that they can be
# overridden by the caller).
option add *Dialog.msg.wrapLength 3i widgetDefault
option add *Dialog.msg.font TkCaptionFont widgetDefault
label $w.msg -justify left -text $text
pack $w.msg -in $w.top -side right -expand 1 -fill both -padx 3m -pady 3m
if {$bitmap ne ""} {
if {$windowingsystem eq "aqua" && $bitmap eq "error"} {
set bitmap "stop"
}
label $w.bitmap -bitmap $bitmap
pack $w.bitmap -in $w.top -side left -padx 3m -pady 3m
}
# 3. Create a row of buttons at the bottom of the dialog.
set i 0
foreach but $args {
button $w.button$i -text $but -command [list set ::tk::Priv(button) $i]
if {$i == $default} {
$w.button$i configure -default active
} else {
$w.button$i configure -default normal
}
grid $w.button$i -in $w.bot -column $i -row 0 -sticky ew \
-padx 10 -pady 4
grid columnconfigure $w.bot $i
# We boost the size of some Mac buttons for l&f
if {$windowingsystem eq "aqua"} {
set tmp [string tolower $but]
if {$tmp eq "ok" || $tmp eq "cancel"} {
grid columnconfigure $w.bot $i -minsize 90
}
grid configure $w.button$i -pady 7
}
incr i
}
# 4. Create a binding for <Return> on the dialog if there is a
# default button.
# Convention also dictates that if the keyboard focus moves among the
# the buttons that the <Return> binding affects the button with the focus.
if {$default >= 0} {
bind $w <Return> [list $w.button$default invoke]
}
bind $w <<PrevWindow>> [list bind $w <Return> {[tk_focusPrev %W] invoke}]
bind $w <Tab> [list bind $w <Return> {[tk_focusNext %W] invoke}]
# 5. Create a <Destroy> binding for the window that sets the
# button variable to -1; this is needed in case something happens
# that destroys the window, such as its parent window being destroyed.
bind $w <Destroy> {set ::tk::Priv(button) -1}
# 6. Withdraw the window, then update all the geometry information
# so we know how big it wants to be, then center the window in the
# display (Motif style) and de-iconify it.
::tk::PlaceWindow $w
tkwait visibility $w
# 7. Set a grab and claim the focus too.
if {$default >= 0} {
set focus $w.button$default
} else {
set focus $w
}
tk::SetFocusGrab $w $focus
# 8. Wait for the user to respond, then restore the focus and
# return the index of the selected button. Restore the focus
# before deleting the window, since otherwise the window manager
# may take the focus away so we can't redirect it. Finally,
# restore any grab that was in effect.
vwait ::tk::Priv(button)
catch {
# It's possible that the window has already been destroyed,
# hence this "catch". Delete the Destroy handler so that
# Priv(button) doesn't get reset by it.
bind $w <Destroy> {}
}
tk::RestoreFocusGrab $w $focus
return $Priv(button)
}