dialog.tcl
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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.
- #
- # RCS: @(#) $Id: dialog.tcl,v 1.14.2.5 2007/05/30 06:37:03 das Exp $
- #
- # 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"
- }
- # Never call if -strict option is omitted in previous test !
- } elseif {"" eq $default} {
- set default -1
- } else {
- set default [lsearch -exact $args $default]
- }
- set windowingsystem [tk windowingsystem]
- if {$tcl_platform(platform) eq "macintosh" || $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- # some window managers will create the window as withdrawn if the parent
- # window is withdrawn or iconified.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 $w]]
- }
- if {$tcl_platform(platform) eq "macintosh" || $windowingsystem eq "aqua"} {
- ::tk::unsupported::MacWindowStyle style $w moveableModal {}
- }
- 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 $w.top -side top -fill both -expand 1
- # 2. Fill the top part with bitmap and message (use the option
- # database for -wraplength and -font so that they can be
- # overridden by the caller).
- option add *Dialog.msg.wrapLength 3i widgetDefault
- if {$tcl_platform(platform) eq "macintosh" || $windowingsystem eq "aqua"} {
- option add *Dialog.msg.font system widgetDefault
- } else {
- option add *Dialog.msg.font {Times 12} 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 {($tcl_platform(platform) eq "macintosh"
- || $windowingsystem eq "aqua") && ($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 $i
- # We boost the size of some Mac buttons for l&f
- if {$tcl_platform(platform) eq "macintosh" || $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.
- if {$default >= 0} {
- bind $w <Return> "
- [list $w.button$default] configure -state active -relief sunken
- update idletasks
- after 100
- set ::tk::Priv(button) $default
- "
- }
- # 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 and de-iconify it.
- wm withdraw $w
- update idletasks
- set x [expr {[winfo screenwidth $w]/2 - [winfo reqwidth $w]/2
- - [winfo vrootx [winfo parent $w]]}]
- set y [expr {[winfo screenheight $w]/2 - [winfo reqheight $w]/2
- - [winfo vrooty [winfo parent $w]]}]
- # Make sure that the window is on the screen and set the maximum
- # size of the window is the size of the screen. That'll let things
- # fail fairly gracefully when very large messages are used. [Bug 827535]
- if {$x < 0} {
- set x 0
- }
- if {$y < 0} {
- set y 0
- }
- wm maxsize $w [winfo screenwidth $w] [winfo screenheight $w]
- wm geometry $w +$x+$y
- wm deiconify $w
- tkwait visibility $w
- # 7. Set a grab and claim the focus too.
- set oldFocus [focus]
- set oldGrab [grab current $w]
- if {$oldGrab ne ""} {
- set grabStatus [grab status $oldGrab]
- }
- grab $w
- if {$default >= 0} {
- focus $w.button$default
- } else {
- focus $w
- }
- # 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 {focus $oldFocus}
- 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> {}
- destroy $w
- }
- if {$oldGrab ne ""} {
- if {$grabStatus ne "global"} {
- grab $oldGrab
- } else {
- grab -global $oldGrab
- }
- }
- return $Priv(button)
- }