#
#  Copyright (c) 1997-2002 The Protein Laboratory, University of Copenhagen
#  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions
#  are met:
#  1. Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#  2. Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
#  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
#  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
#  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
#  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
#  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
#  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
#  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#  SUCH DAMAGE.
#
#  Created by Dmitry Karasik <dk@plab.ku.dk>
#
#  $Id$

# contains:
#   CheckList

use strict;
use Prima::Const;
use Prima::Classes;
use Prima::Lists;
use Prima::StdBitmap;

package Prima::CheckList;
use vars qw(@ISA);
@ISA = qw(Prima::ListBox);

my @images = (
	Prima::StdBitmap::image(sbmp::CheckBoxUnchecked),
	Prima::StdBitmap::image(sbmp::CheckBoxChecked),
);

my @imgSize = (0,0);
@imgSize = $images[0]-> size if $images[0];

sub profile_default
{
	my $def = $_[ 0]-> SUPER::profile_default;
	my %prf = (
		vector => '',
	);
	@$def{keys %prf} = values %prf;
	return $def;
}


sub init
{
	my $self = shift;
	$self-> {vector} = 0;
	my %profile = $self-> SUPER::init(@_);
	$self-> {fontHeight} = $self-> font-> height;
	$self-> recalc_icons;
	$self-> vector( $profile{vector});
	return %profile;
}

sub on_measureitem
{
	my ( $self, $index, $sref) = @_;
	$$sref = $self-> get_text_width( $self-> {items}-> [$index]) + $imgSize[0] + 4;
}

sub recalc_icons
{
	return unless $imgSize[0];
	my $self = $_[0];
	my $hei = $self-> font-> height + 2;
	$hei = $imgSize[1] + 2 if $hei < $imgSize[1] + 2;
	$self-> itemHeight( $hei);
}

sub on_fontchanged
{
	my $self = shift;
	$self-> recalc_icons;
	$self-> {fontHeight} = $self-> font-> height;
	$self-> SUPER::on_fontchanged(@_);
}


sub draw_items
{
	shift-> std_draw_text_items( @_);
}

sub draw_text_items
{
	my ( $self, $canvas, $first, $last, $step, $x, $y, $textShift, $clipRect) = @_;
	my ( $i, $j);
	for ( $i = $first, $j = 1; $i <= $last; $i += $step, $j++) {
		next if $self-> {widths}-> [$i] + $self-> {offset} + $x + 1 < $clipRect-> [0];
		$canvas-> text_out( $self-> {items}-> [$i], $x + 2 + $imgSize[0],
			$y + $textShift - $j * $self-> {itemHeight} + 1);
		$canvas-> put_image( $x + 1, 
			$y + int(( $self-> {itemHeight} - $imgSize[1]) / 2) - 
				$j * $self-> {itemHeight} + 1,
			$images[ vec($self-> {vector}, $i, 1)],
		);
	}
}

sub on_mouseclick
{
	my ( $self, $btn, $mod, $x, $y, $dbl) = @_;
	$self-> SUPER::on_mouseclick( $btn, $mod, $x, $y);
	return if $btn != mb::Left;
	my $foc = $self-> focusedItem;
	return if $foc < 0;
	my $f = vec( $self-> {vector}, $foc, 1) ? 0 : 1;
	vec( $self-> {vector}, $foc, 1) = $f;
	$self-> notify(q(Change), $foc, $f);
	$self-> invalidate_rect( $self-> item2rect( $foc));
}

sub on_click
{
	my $self = $_[0];
	my $foc = $self-> focusedItem;
	return if $foc < 0;
	my $f = vec( $self-> {vector}, $foc, 1) ? 0 : 1;
	vec( $self-> {vector}, $foc, 1) = $f;
	$self-> notify(q(Change), $foc, $f);
	$self-> invalidate_rect( $self-> item2rect( $foc));
}


sub vector
{
	my $self = $_[0];
	return $self-> {vector} unless $#_;
	$self-> {vector} = $_[1];
	$self-> repaint;
}

sub clear_all_buttons
{
	my $self = $_[0];
	my $c = int($self-> {count} / 32) + (($self-> {count} % 32) ? 1 : 0);
	vec( $self-> {vector}, $c, 32) = 0 while $c--;
	$self-> notify(q(Change), -1, 1);
	$self-> repaint;
};

sub set_all_buttons
{
	my $self = $_[0];
	my $c = int($self-> {count} / 32) + (($self-> {count} % 32) ? 1 : 0);
	vec( $self-> {vector}, $c, 32) = 0xffffffff while $c--;
	$self-> notify(q(Change), -1, 0);
	$self-> repaint;
};

sub button
{
	my ( $self, $index, $state) = @_;
	return 0 if $index < 0 || $index >= $self-> {count};
	my $current = vec( $self-> {vector}, $index, 1);
	return $current unless defined $state;
	$state = ( $state < 0) ? !$current : ( $state ? 1 : 0);
	return $current if $current == $state; 
	vec( $self-> {vector}, $index, 1) = $state;
	$self-> notify(q(Change), $index, $state);
	$self-> redraw_items( $index);
	return $state;
}

#sub on_change
#{
#	my ( $self, $index, $state) = @_;
#}

1;

__DATA__

=pod

=head1 NAME

Prima::ExtLists - extended functionality for list boxes

=head1 SYNOPSIS

	use Prima::ExtLists;

	my $vec = '';
	vec( $vec, 0, 8) = 0x55;
	Prima::CheckList-> new(
		items  => [1..10],
		vector => $vec,
	);

=head1 DESCRIPTION 

The module is intended to be a collection of list boxes with
particular enhancements. Currently the only package is contained
is C<Prima::CheckList> class.

=head1 Prima::CheckList

Provides a list box, where each item is equipped with a check box.
The check box state can interactively be toggled by the enter key;
also the list box reacts differently by click and double click.

=head2 Properties

=over

=item button INDEX, STATE

Runtime only. Sets INDEXth button STATE to 0 or 1.
If STATE is -1, the button state is toggled.

Returns the new state of the button.

=item vector VEC

VEC is a vector scalar, where each bit corresponds to the check state
of each list box item. 

See also: L<perlfunc/vec>.

=back

=head2 Methods

=over

=item clear_all_buttons

Sets all buttons to state 0

=item set_all_buttons

Sets all buttons to state 1

=back

=head1 AUTHOR

Dmitry Karasik, E<lt>dmitry@karasik.eu.orgE<gt>.

=head1 SEE ALSO

L<Prima>, L<Prima::Lists>, F<examples/extlist.pl>

=cut