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200 lines
6.3 KiB
Tcl
200 lines
6.3 KiB
Tcl
15 years ago
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# dialog.tcl --
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#
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# This file defines the procedure tk_dialog, which creates a dialog
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# box containing a bitmap, a message, and one or more buttons.
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#
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# RCS: @(#) $Id: dialog.tcl,v 1.14 2002/08/31 06:12:28 das Exp $
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#
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# Copyright (c) 1992-1993 The Regents of the University of California.
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# Copyright (c) 1994-1997 Sun Microsystems, Inc.
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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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#
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#
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# ::tk_dialog:
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#
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# This procedure displays a dialog box, waits for a button in the dialog
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# to be invoked, then returns the index of the selected button. If the
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# dialog somehow gets destroyed, -1 is returned.
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#
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# Arguments:
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# w - Window to use for dialog top-level.
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# title - Title to display in dialog's decorative frame.
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# text - Message to display in dialog.
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# bitmap - Bitmap to display in dialog (empty string means none).
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# default - Index of button that is to display the default ring
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# (-1 means none).
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# args - One or more strings to display in buttons across the
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# bottom of the dialog box.
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proc ::tk_dialog {w title text bitmap default args} {
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global tcl_platform
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variable ::tk::Priv
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# Check that $default was properly given
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if {[string is int $default]} {
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if {$default >= [llength $args]} {
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return -code error "default button index greater than number of\
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buttons specified for tk_dialog"
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}
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} elseif {[string equal {} $default]} {
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set default -1
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} else {
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set default [lsearch -exact $args $default]
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}
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# 1. Create the top-level window and divide it into top
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# and bottom parts.
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catch {destroy $w}
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toplevel $w -class Dialog
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wm title $w $title
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wm iconname $w Dialog
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wm protocol $w WM_DELETE_WINDOW { }
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# Dialog boxes should be transient with respect to their parent,
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# so that they will always stay on top of their parent window. However,
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# some window managers will create the window as withdrawn if the parent
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# window is withdrawn or iconified. Combined with the grab we put on the
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# window, this can hang the entire application. Therefore we only make
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# the dialog transient if the parent is viewable.
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#
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if {[winfo viewable [winfo toplevel [winfo parent $w]]] } {
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wm transient $w [winfo toplevel [winfo parent $w]]
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}
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if {[string equal $tcl_platform(platform) "macintosh"]
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|| [string equal [tk windowingsystem] "aqua"]} {
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::tk::unsupported::MacWindowStyle style $w dBoxProc
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}
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frame $w.bot
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frame $w.top
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if {[string equal [tk windowingsystem] "x11"]} {
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$w.bot configure -relief raised -bd 1
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$w.top configure -relief raised -bd 1
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}
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pack $w.bot -side bottom -fill both
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pack $w.top -side top -fill both -expand 1
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# 2. Fill the top part with bitmap and message (use the option
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# database for -wraplength and -font so that they can be
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# overridden by the caller).
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option add *Dialog.msg.wrapLength 3i widgetDefault
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if {[string equal $tcl_platform(platform) "macintosh"]
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|| [string equal [tk windowingsystem] "aqua"]} {
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option add *Dialog.msg.font system widgetDefault
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} else {
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option add *Dialog.msg.font {Times 12} widgetDefault
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}
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label $w.msg -justify left -text $text
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pack $w.msg -in $w.top -side right -expand 1 -fill both -padx 3m -pady 3m
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if {[string compare $bitmap ""]} {
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if {([string equal $tcl_platform(platform) "macintosh"]
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|| [string equal [tk windowingsystem] "aqua"]) &&\
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[string equal $bitmap "error"]} {
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set bitmap "stop"
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}
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label $w.bitmap -bitmap $bitmap
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pack $w.bitmap -in $w.top -side left -padx 3m -pady 3m
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}
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# 3. Create a row of buttons at the bottom of the dialog.
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set i 0
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foreach but $args {
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button $w.button$i -text $but -command [list set ::tk::Priv(button) $i]
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if {$i == $default} {
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$w.button$i configure -default active
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} else {
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$w.button$i configure -default normal
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}
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grid $w.button$i -in $w.bot -column $i -row 0 -sticky ew \
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-padx 10 -pady 4
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grid columnconfigure $w.bot $i
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# We boost the size of some Mac buttons for l&f
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if {[string equal $tcl_platform(platform) "macintosh"]
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|| [string equal [tk windowingsystem] "aqua"]} {
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set tmp [string tolower $but]
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if {[string equal $tmp "ok"] || [string equal $tmp "cancel"]} {
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grid columnconfigure $w.bot $i -minsize [expr {59 + 20}]
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}
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}
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incr i
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}
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# 4. Create a binding for <Return> on the dialog if there is a
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# default button.
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if {$default >= 0} {
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bind $w <Return> "
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[list $w.button$default] configure -state active -relief sunken
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update idletasks
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after 100
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set ::tk::Priv(button) $default
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"
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}
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# 5. Create a <Destroy> binding for the window that sets the
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# button variable to -1; this is needed in case something happens
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# that destroys the window, such as its parent window being destroyed.
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bind $w <Destroy> {set ::tk::Priv(button) -1}
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# 6. Withdraw the window, then update all the geometry information
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# so we know how big it wants to be, then center the window in the
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# display and de-iconify it.
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wm withdraw $w
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update idletasks
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set x [expr {[winfo screenwidth $w]/2 - [winfo reqwidth $w]/2 \
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- [winfo vrootx [winfo parent $w]]}]
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set y [expr {[winfo screenheight $w]/2 - [winfo reqheight $w]/2 \
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- [winfo vrooty [winfo parent $w]]}]
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wm geom $w +$x+$y
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wm deiconify $w
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# 7. Set a grab and claim the focus too.
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set oldFocus [focus]
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set oldGrab [grab current $w]
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if {[string compare $oldGrab ""]} {
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set grabStatus [grab status $oldGrab]
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}
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grab $w
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if {$default >= 0} {
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focus $w.button$default
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} else {
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focus $w
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}
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# 8. Wait for the user to respond, then restore the focus and
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# return the index of the selected button. Restore the focus
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# before deleting the window, since otherwise the window manager
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# may take the focus away so we can't redirect it. Finally,
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# restore any grab that was in effect.
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vwait ::tk::Priv(button)
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catch {focus $oldFocus}
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catch {
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# It's possible that the window has already been destroyed,
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# hence this "catch". Delete the Destroy handler so that
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# Priv(button) doesn't get reset by it.
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bind $w <Destroy> {}
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destroy $w
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}
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if {[string compare $oldGrab ""]} {
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if {[string compare $grabStatus "global"]} {
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grab $oldGrab
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} else {
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grab -global $oldGrab
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}
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}
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return $Priv(button)
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}
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