3 # This file defines the procedure tk_dialog, which creates a dialog
4 # box containing a bitmap, a message, and one or more buttons.
6 # Copyright (c) 1992-1993 The Regents of the University of California.
7 # Copyright (c) 1994-1997 Sun Microsystems, Inc.
9 # See the file "license.terms" for information on usage and redistribution
10 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
16 # This procedure displays a dialog box, waits for a button in the dialog
17 # to be invoked, then returns the index of the selected button. If the
18 # dialog somehow gets destroyed, -1 is returned.
21 # w - Window to use for dialog top-level.
22 # title - Title to display in dialog's decorative frame.
23 # text - Message to display in dialog.
24 # bitmap - Bitmap to display in dialog (empty string means none).
25 # default - Index of button that is to display the default ring
27 # args - One or more strings to display in buttons across the
28 # bottom of the dialog box.
30 proc ::tk_dialog {w title text bitmap default args} {
33 # Check that $default was properly given
34 if {[string is integer -strict $default]} {
35 if {$default >= [llength $args]} {
36 return -code error -errorcode {TK DIALOG BAD_DEFAULT} \
37 "default button index greater than number of buttons\
38 specified for tk_dialog"
40 } elseif {"" eq $default} {
43 set default [lsearch -exact $args $default]
46 set windowingsystem [tk windowingsystem]
48 # 1. Create the top-level window and divide it into top
52 toplevel $w -class Dialog
55 wm protocol $w WM_DELETE_WINDOW { }
57 # Dialog boxes should be transient with respect to their parent,
58 # so that they will always stay on top of their parent window. However,
59 # some window managers will create the window as withdrawn if the parent
60 # window is withdrawn or iconified. Combined with the grab we put on the
61 # window, this can hang the entire application. Therefore we only make
62 # the dialog transient if the parent is viewable.
64 if {[winfo viewable [winfo toplevel [winfo parent $w]]] } {
65 wm transient $w [winfo toplevel [winfo parent $w]]
68 if {$windowingsystem eq "aqua"} {
69 ::tk::unsupported::MacWindowStyle style $w moveableModal {}
70 } elseif {$windowingsystem eq "x11"} {
71 wm attributes $w -type dialog
76 if {$windowingsystem eq "x11"} {
77 $w.bot configure -relief raised -bd 1
78 $w.top configure -relief raised -bd 1
80 pack $w.bot -side bottom -fill both
81 pack $w.top -side top -fill both -expand 1
82 grid anchor $w.bot center
84 # 2. Fill the top part with bitmap and message (use the option
85 # database for -wraplength and -font so that they can be
86 # overridden by the caller).
88 option add *Dialog.msg.wrapLength 3i widgetDefault
89 option add *Dialog.msg.font TkCaptionFont widgetDefault
91 label $w.msg -justify left -text $text
92 pack $w.msg -in $w.top -side right -expand 1 -fill both -padx 3m -pady 3m
94 if {$windowingsystem eq "aqua" && $bitmap eq "error"} {
97 label $w.bitmap -bitmap $bitmap
98 pack $w.bitmap -in $w.top -side left -padx 3m -pady 3m
101 # 3. Create a row of buttons at the bottom of the dialog.
105 button $w.button$i -text $but -command [list set ::tk::Priv(button) $i]
106 if {$i == $default} {
107 $w.button$i configure -default active
109 $w.button$i configure -default normal
111 grid $w.button$i -in $w.bot -column $i -row 0 -sticky ew \
113 grid columnconfigure $w.bot $i
114 # We boost the size of some Mac buttons for l&f
115 if {$windowingsystem eq "aqua"} {
116 set tmp [string tolower $but]
117 if {$tmp eq "ok" || $tmp eq "cancel"} {
118 grid columnconfigure $w.bot $i -minsize 90
120 grid configure $w.button$i -pady 7
125 # 4. Create a binding for <Return> on the dialog if there is a
127 # Convention also dictates that if the keyboard focus moves among the
128 # the buttons that the <Return> binding affects the button with the focus.
131 bind $w <Return> [list $w.button$default invoke]
133 bind $w <<PrevWindow>> [list bind $w <Return> {[tk_focusPrev %W] invoke}]
134 bind $w <<NextWindow>> [list bind $w <Return> {[tk_focusNext %W] invoke}]
136 # 5. Create a <Destroy> binding for the window that sets the
137 # button variable to -1; this is needed in case something happens
138 # that destroys the window, such as its parent window being destroyed.
140 bind $w <Destroy> {set ::tk::Priv(button) -1}
142 # 6. Withdraw the window, then update all the geometry information
143 # so we know how big it wants to be, then center the window in the
144 # display (Motif style) and de-iconify it.
149 # 7. Set a grab and claim the focus too.
152 set focus $w.button$default
156 tk::SetFocusGrab $w $focus
158 # 8. Wait for the user to respond, then restore the focus and
159 # return the index of the selected button. Restore the focus
160 # before deleting the window, since otherwise the window manager
161 # may take the focus away so we can't redirect it. Finally,
162 # restore any grab that was in effect.
164 vwait ::tk::Priv(button)
167 # It's possible that the window has already been destroyed,
168 # hence this "catch". Delete the Destroy handler so that
169 # Priv(button) doesn't get reset by it.
173 tk::RestoreFocusGrab $w $focus