DialogBoxUL.pm 4.54 KB
Newer Older
1
2
3
4
5
#
# DialogBox is similar to Dialog except that it allows any widget
# in the top frame. Widgets can be added with the add method. Currently
# there exists no way of deleting a widget once it has been added.

6
package Tk::DialogBoxUL;
7
8
9
10
11
12
13
14
15

use strict;
use Carp;

use vars qw($VERSION);
$VERSION = '4.016'; # was: sprintf '4.%03d', q$Revision: #13 $ =~ /\D(\d+)\s*$/;

use base  qw(Tk::Toplevel);

16
Tk::Widget->Construct('DialogBoxUL');
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108

sub Populate {
    my ($cw, $args) = @_;

    $cw->SUPER::Populate($args);
    my $buttons = delete $args->{'-buttons'};
    $buttons = ['OK'] unless defined $buttons;
    my $default_button = delete $args->{'-default_button'};
    $default_button = $buttons->[0] unless defined $default_button;
    my $cancel_button = delete $args->{'-cancel_button'};
    if (!$cancel_button && @$buttons == 1) {
	$cancel_button = $buttons->[0];
    }

    $cw->{'selected_button'} = '';
    $cw->transient($cw->Parent->toplevel);
    $cw->withdraw;
    if ($cancel_button) {
	$cw->protocol('WM_DELETE_WINDOW' => sub { $cw->{'cancel_button'}->invoke });
    } else {
	$cw->protocol('WM_DELETE_WINDOW' => sub { $cw->{'selected_button'} = undef });
    }
    # Make sure waitVariable exits if a waiting dialog is destroyed
    $cw->OnDestroy(sub { $cw->{'selected_button'} = $cw->{'selected_button'} });

    # create the two frames
    my $top = $cw->Component('Frame', 'top');
    $top->configure(-relief => 'raised', -bd => 1) unless $Tk::platform eq 'MSWin32';
    my $bot = $cw->Component('Frame', 'bottom');
    $bot->configure(-relief => 'raised', -bd => 1) unless $Tk::platform eq 'MSWin32';
    $bot->pack(qw/-side bottom -fill both -ipady 3 -ipadx 3/);
    $top->pack(qw/-side top -fill both -ipady 3 -ipadx 3 -expand 1/);

    # create a row of buttons in the bottom.
    my $bl;  # foreach my $var: perl > 5.003_08
    foreach $bl (@$buttons)
     {
	my $b = $bot->Button(-text => $bl, -command => sub { $cw->{'selected_button'} = "$bl" } );
	$b->bind('<Return>' => [ $b, 'Invoke']);
	$cw->Advertise("B_$bl" => $b);
        if ($Tk::platform eq 'MSWin32')
         {
          $b->configure(-width => 10, -pady => 0);
         }
	if ($bl eq $default_button) {
	    my $db = $bot->Frame(-relief => 'sunken', -bd => 1);
	    $b->raise($db);
	    $b->pack(-in => $db, -padx => '2', -pady => '2');
	    $db->pack(-side => 'left', -expand => 1, -padx => 1, -pady => 1);
	    $cw->{'default_button'} = $b;
	    $cw->bind('<Return>' => [ $b, 'Invoke']);
	} else {
	    $b->pack(-side => 'left', -expand => 1,  -padx => 1, -pady => 1);
	}
	if (defined $cancel_button && $bl eq $cancel_button) {
	    $cw->{'cancel_button'} = $b;
	}
    }
    if (defined $default_button && !$cw->{'default_button'}) {
	warn "Default button `$default_button' does not exist.\n";
    }
    if (defined $cancel_button && !$cw->{'cancel_button'}) {
	warn "Cancel button `$cancel_button' does not exist.\n";
    }
    $cw->ConfigSpecs(-command    => ['CALLBACK', undef, undef, undef ],
                     -foreground => ['DESCENDANTS', 'foreground','Foreground', 'black'],
                     -background => ['DESCENDANTS', 'background','Background',  undef],
		     -focus	 => ['PASSIVE', undef, undef, undef],
		     -showcommand => ['CALLBACK', undef, undef, undef],
                    );
    $cw->Delegates('Construct',$top);
}

sub add {
    my ($cw, $wnam, @args) = @_;
    my $w = $cw->Subwidget('top')->$wnam(@args);
    $cw->Advertise("\L$wnam" => $w);
    return $w;
}

sub Wait
{
 my $cw = shift;
 $cw->Callback(-showcommand => $cw);
 $cw->waitVariable(\$cw->{'selected_button'});
 $cw->grabRelease if Tk::Exists($cw);
 $cw->withdraw if Tk::Exists($cw);
 $cw->Callback(-command => $cw->{'selected_button'});
}

sub Show {

109
    croak 'DialogBoxUL: "Show" method requires at least 1 argument'
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
	if scalar @_ < 1;
    my $cw = shift;
    my ($grab) = @_;
    my $old_focus = $cw->focusSave;
    my $old_grab = $cw->grabSave;

    shift if defined $grab && length $grab && ($grab =~ /global/);
    $cw->Popup(@_);

    Tk::catch {
    if (defined $grab && length $grab && ($grab =~ /global/)) {
	$cw->grabGlobal;
    } else {
	$cw->grab;
    }
    };
    if (my $focusw = $cw->cget(-focus)) {
	$focusw->focus;
    } elsif (defined $cw->{'default_button'}) {
	$cw->{'default_button'}->focus;
    } else {
	$cw->focus;
    }
    $cw->Wait;
    &$old_focus;
    &$old_grab;
    return $cw->{'selected_button'};
}

sub SelectButton
{
 my ($w, $button_text) = @_;
 $w->{'selected_button'} = $button_text;
}

sub Exit
{
 my $cw = shift;
148
 #kill the DialogBoxUL, by faking a 'DONE'
149
150
151
152
 $cw->{'selected_button'} = $cw->{'default_button'}->cget(-text);
}

1;