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MLEHMANN / Gtk-Perl-0.7010 / Gtk / GtkColorSelectButton.pm 

            

              
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package Gtk::ColorSelectButton;
=head1 NAME
Gtk::ColorSelectButton - Choose a color
=head1 SYNOPSIS
        use Gtk;
    use Gtk::ColorSelectButton;
     
    ...
    init Gtk;
    init Gtk::ColorSelectButton;
    ...
    $color_button = Gtk::ColorSelectButton->new();
    $hbox->pack_start($color_button, 1,1,0);
    $color_button->show();
    ...
    print $color_button->color; #shortcut for ->get('color')
    ...
    $color_button->set( color => "10 40 250" ); # R G B
=head1 DESCRIPTION
Gtk::ColorSelectButton shows a button with a uniform color. Pressing
this buton pops up the color_selection dialog in which a new color
may be chosen. When the color selection dialog is closed, the chosen
color is reflected in the color of the button.
The gtk variable C<color> provides a way to access the chosen color.
=head1 AUTHOR
Dov Grobgeld <dov@imagic.weizmann.ac.il>, with modifications by
Kenneth Albanowski <kjahds@kjahds.com>.
=head1 COPYRIGHT
Copyright (c) 1998 Dov Grobgeld. All rights reserved. This program may
be redistributed and copied under the same licence as Perl itself.
=cut
use strict;
use vars qw($VERSION @ISA);
use Gtk;
$VERSION = "0.22";
@ISA = qw(Gtk::Button);
# Class defaults data
my @class_def_color = (255,175,0);
sub init {
        my($class) = shift;
        Gtk::Button->register_subtype($class);
}
sub GTK_CLASS_INIT {
        my($class) = shift;
         
        if (Gtk->major_version < 1 or (Gtk->major_version == 1 and Gtk->minor_version < 1)) {
                add_arg_type $class "color", "string", 3; #R/W
        } else {
                add_arg_type $class "color", "GtkString", 3; #R/W
        }
}
sub GTK_OBJECT_INIT {
    my (@color) = @class_def_color;
     
    my($color_button) = @_;
     
    $color_button->{_color} ||= [@color];
    my $preview = new Gtk::Preview -color;
     
    signal_connect $color_button "size_allocate" => sub {
        my($self,$allocation) = @_;
        my($x,$y,$w,$h) = @$allocation;
        $w -= 6;
        $h -= 6;
        $self->{_preview_width} = $w;
        $self->{_preview_height} = $h;
        $self->{_preview}->size($w,$h);
        update_color $self;
    };
     
    $color_button->{_preview} = $preview;
    $color_button->add($preview);
         
    signal_connect $color_button "clicked" => \&cb_color_button;
     
    $preview->show;
}
sub GTK_OBJECT_SET_ARG {
        my($self,$arg,$id, $value) = @_;
        $self->{_color} = [split(' ',$value)];
        $self->update_color;
}
sub GTK_OBJECT_GET_ARG {
        my($self,$arg,$id) = @_;
        return join(' ',@{$self->{_color}});
}
sub new {
    my $pkg = shift;
    return new Gtk::Widget $pkg, @_;
}
sub update_color($) {
    my($this) = shift;
     
    return unless defined $this->{_preview} and defined $this->{_preview_width};
     
    my($preview, $color) = ($this->{_preview}, $this->{_color});
    my($width, $height) = ($this->{_preview_width}, $this->{_preview_height});
     
    my($buf) = pack("C3", @$color) x $width;
    for(my $i=0;$i<$height;$i++) {
        $preview->draw_row($buf, 0, $i, $width);
    }
    $preview->draw(undef);
}
sub color_selection_ok {
    my($widget, $dialog, $color_button) = @_;
         
    my(@color) = $dialog->colorsel->get_color;
    @{$color_button->{_color}} = map(int(255.99*$_),@color);
        $color_button->update_color();
    $dialog->destroy();
    delete $color_button->{_cs_window};
}
sub cb_color_button {
    my($color_button) = @_;
     
    if (defined $color_button->{_cs_window}) {
        if (!$color_button->{_cs_window}->mapped) {
                $color_button->{_cs_window}->hide;
            }
        $color_button->{_cs_window}->show;
        $color_button->{_cs_window}->window->raise;
        return;
    }
    my $cs_window=new Gtk::ColorSelectionDialog("Color");
    $cs_window->colorsel->set_color(map($_*1/255,@{$color_button->{_color}}));
    $cs_window->show();
    $cs_window->ok_button->signal_connect("clicked",
                                          \&color_selection_ok,
                                          $cs_window,
                                          $color_button);
    $cs_window->cancel_button->signal_connect("clicked",
                                              sub { $cs_window->destroy; delete $color_button->{_cs_window} });
        $color_button->{_cs_window} = $cs_window;
}
1;