#
#  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: FontDialog.pm,v 1.23 2005/10/13 17:22:50 dk Exp $

package Prima::FontDialog;

use strict;
use Prima::Const;
use Prima::Classes;
use Prima::Buttons;
use Prima::ComboBox;
use Prima::Label;
use Prima::MsgBox;


use vars qw( @ISA);
@ISA = qw( Prima::Dialog);

{
my %RNT = (
	%{Prima::Dialog-> notification_types()},
	BeginDragFont => nt::Command,
	EndDragFont   => nt::Command,
);

sub notification_types { return \%RNT; }
}

sub profile_default
{
	return {
		%{$_[ 0]-> SUPER::profile_default},
		width       => 540,
		height      => 350,
		sizeMin     => [380, 280],
		centered    => 1,
		visible     => 0,
		designScale => [7, 16],
		text        => 'Select font',
		borderStyle => bs::Sizeable,

		showHelp    => 0,
		fixedOnly   => 0,
		logFont     => $_[ 0]-> get_default_font,
	}
}

sub profile_check_in
{
	my ( $self, $p, $default) = @_;
	$self-> SUPER::profile_check_in( $p, $default);
	$p-> { logFont} = {} unless exists $p-> { logFont};
	$p-> { logFont} = Prima::Drawable-> font_match( $p-> { logFont}, $default-> { logFont}, 1);
	unless ( $p-> {sizeMin}) {
		$p-> {sizeMin}-> [0] = $default-> {sizeMin}-> [0] * $p-> {width} / $default-> {width};
		$p-> {sizeMin}-> [1] = $default-> {sizeMin}-> [1] * $p-> {height} / $default-> {height};
	}
}

sub init
{
	my $self = shift;
	my %profile = $self-> SUPER::init(@_);
	my $j;

	$self-> {showHelp}  = $profile{showHelp};
	$self-> {logFont}   = $profile{logFont};
	$self-> {fixedOnly} = $profile{fixedOnly};

	my $gr = $self-> insert( CheckBoxGroup =>
		origin => [ 10, 10],
		size   => [ 150, 150],
		name   => 'Style',
	);

	$j = $gr-> insert( CheckBox =>
		origin => [ 15, 95],
		size   => [ 96, 36],
		name   => 'FontStyleButton',
		text   => '~Bold',
		delegations => [$self, 'Click'],
	);

	$j = $gr-> insert( CheckBox =>
		origin => [ 15, 65],
		size   => [ 96, 36],
		name   => 'FontStyleButton',
		text   => '~Italic',
		delegations => [$self, 'Click'],
	);

	$j = $gr-> insert( CheckBox =>
		origin => [ 15, 35],
		size   => [ 96, 36],
		name   => 'FontStyleButton',
		text   => '~Underline',
		delegations => [$self, 'Click'],
	);

	$j = $gr-> insert( CheckBox =>
		origin => [ 15, 5],
		size   => [ 96, 36],
		name   => 'FontStyleButton',
		text   => 'Strike ~out',
		delegations => [$self, 'Click'],
	);

	my $name = $self-> insert( ComboBox =>
		origin => [ 10, 165],
		size   => [ 250, 150],
		name   => 'Name',
		style  => cs::Simple,
		onSelectItem => sub { $self-> Name_SelectItem( @_);},
		growMode     => gm::Client,
	);

	$self-> insert( Label =>
		origin    => [ 10, 320],
		size      => [ 96, 18],
		text      => '~Font:',
		focusLink => $name,
		growMode  => gm::Ceiling,
	);

	my $size = $self-> insert( ComboBox =>
		origin => [ 275, 165],
		size   => [ 150, 150],
		name   => 'Size',
		style  => cs::Simple,
		delegations => ['Change'],
		growMode    => gm::Right,
	);

	$self-> insert( Label =>
		origin    => [ 275, 320],
		size      => [ 96, 18],
		text      => '~Size:',
		focusLink => $size,
		growMode  => gm::GrowLoX | gm::GrowLoY,
	);

	$gr = $self-> insert( GroupBox =>
		origin     => [ 175, 40],
		size       => [ 355, 120],
		name       => 'Sample',
		growMode   => gm::Floor,
	);
	
	$j = $gr-> insert( Widget =>
		origin     => [ 5, 5],
		size       => [ 345, 90],
		name       => 'Example',
		delegations=> [ $self, 'Paint', 'FontChanged', 'MouseDown', 'MouseUp'],
		growMode   => gm::Client,
	);

	my $enc = $self-> insert( ComboBox =>
		origin     => [ 290, 10],
		size       => [ 240, 20],
		name       => 'Encoding',
		style      => cs::DropDownList,
		delegations=> [ 'Change' ],
		growMode   => gm::Floor,
	);

	$self-> insert( Label => 
		origin     => [ 175, 10],
		size       => [ 96, 18],
		text       => '~Encoding',
		focusLink  => $enc,
	);
	
	$self-> insert( Button =>
		origin      => [ 435, 280],
		size        => [ 96, 36],
		text        => '~OK',
		default     => 1,
		modalResult => mb::OK,
		growMode    => gm::GrowLoX | gm::GrowLoY,
	);

	$self-> insert( Button =>
		origin      => [ 435, 235],
		size        => [ 96, 36],
		text        => 'Cancel',
		modalResult => mb::Cancel,
		growMode    => gm::GrowLoX | gm::GrowLoY,
	);

	$self-> insert( Button =>
		origin      => [ 435, 190],
		size        => [ 96, 36],
		name        => 'Help',
		text        => '~Help',
	) if $self-> {showHelp};

	$self-> refresh_fontlist;
	$self-> logfont_to_view;
	$self-> apply( %{$self-> {logFont}});

	return %profile;
}

sub refresh_fontlist
{
	my $self = $_[0];
	my %fontList;
	my @fontItems;

	for ( sort { $a-> {name} cmp $b-> {name}} @{$::application-> fonts}) {
		next if $self-> {fixedOnly} and $_-> {pitch} != fp::Fixed;
		$fontList{$_-> {name}} = $_;
		push ( @fontItems, $_-> {name});
	}

	$self-> {fontList}  = \%fontList;
	$self-> {fontItems} = \@fontItems;

	$self-> Name-> items( \@fontItems);
	$self-> Name-> text( $self-> {logFont}-> {name});
	$self-> reset_sizelist( 1);
}

sub reset_sizelist
{
	my ( $self, $name_changed) = @_;
	my $Name = $self-> Name;
	my $fn   = $Name-> List-> get_items( $Name-> focusedItem);
	my @sizes;

	if ( defined $fn) {
		my $current_encoding = $self-> Encoding-> List-> get_items( 
			$self-> Encoding-> List-> focusedItem
		) || '';
		
		my @list = @{$::application-> fonts( $fn, $name_changed ? '' : $current_encoding)};

		if ( $name_changed) {
			my %enc;
			my @enc_items;
			for ( map { $_-> {encoding}} @list) {
				next if $enc{$_};
				push ( @enc_items, $_ );
				$enc{$_} = 1;
			}
			my $found = 0;
			my $i = 0;
			
			for ( @enc_items) {
				$found = $i, last if $_ eq $current_encoding;
				$i++;
			}
			$self-> Encoding-> List-> items( \@enc_items);
			$self-> Encoding-> text( $current_encoding = $enc_items[ $found]);
		}
		
		for ( @list)
		{
			next if $current_encoding ne $_-> {encoding};
			if ( $_-> { vector})
			{
				@sizes = qw( 8 9 10 11 12 14 16 18 20 22 24 26 28 32 48 72);
				last;
			} else {
				push ( @sizes, $_-> {size});
			}
		}
		my %k = map { $_ => 1 } @sizes;
		@sizes = sort { $a <=> $b } keys %k;
		@sizes = (10) unless scalar @sizes;
	}
	$self-> Size-> items( \@sizes);
	$self-> Size-> focusedItem(0);
	return $fn;
}

sub logfont_to_view
{
	my $self = $_[0];
	my %f = %{$self-> {logFont}};
	$self-> Name-> text( $f{name});
	$self-> Size-> text( $f{size});
	$self-> Encoding-> text( $f{encoding});
	my $grp = $self-> Style;
	my $style = $f{style};
	$grp-> value( 0 |
	(( $style & fs::Bold)       ? 1 : 0) |
	(( $style & fs::Italic)     ? 2 : 0) |
	(( $style & fs::Underlined) ? 4 : 0) |
	(( $style & fs::StruckOut)  ? 8 : 0)
);
}

sub apply
{
	my ( $self, %hash) = @_;
	delete $hash{$_} for ( qw( width height direction));
	$self-> {logFont} = $self-> font_match( \%hash, $self-> {logFont}, 0);
	delete $self-> {logFont}-> {$_} for ( qw( width height direction));
	$self-> {fixedOnly} ? 
		$self-> {logFont}-> {pitch} = fp::Fixed : 
		delete $self-> {logFont}-> {pitch};
	$self-> { normalFontSet} = 1;
	$self-> Sample-> Example-> font( $self-> {logFont});
	delete $self-> { normalFontSet};
}

sub on_begindragfont
{
	my ( $self) = @_;
	$self-> {old_text} = $self-> text;
	$self-> Sample-> Example-> pointer( cr::Invalid);
	$self-> text( "Apply font...");
}

sub on_enddragfont
{
	my ( $self, $widget) = @_;

	$self-> Sample-> Example-> pointer( cr::Default);
	$self-> text( $self-> {old_text});
	delete $self-> {old_text};
	$widget-> font( $self-> logFont)
		if $widget;
}

sub Example_Paint
{
	my ( $owner, $self, $canvas) = @_;
	my @size = $canvas-> size;
	$canvas-> color( $canvas-> get_nearest_color( $self-> backColor));
	$canvas-> bar( 0, 0, @size);
	$canvas-> color( cl::Black);
	my $f = $self-> font;
	my $line = 'AaBbYyZz';
	$canvas-> text_out(
		$line,
		( $size[0] - $canvas-> get_text_width( $line)) / 2,
		( $size[1] - $f-> height) / 2
	);
}

sub Example_FontChanged
{
	my ( $owner, $example) = @_;
	return if $owner-> {normalFontSet};
	$owner-> logFont( $example-> font);
}

sub Example_MouseDown
{
	my ( $owner, $self, $btn, $mod, $x, $y) = @_;
	return if $btn != mb::Left or $self-> {drag_font}; 
	$self-> {drag_font} = 1;
	$self-> capture(1);
	$owner-> notify( 'BeginDragFont', $self-> {drag_color});
}

sub Example_MouseUp
{
	my ( $owner, $self, $btn, $mod, $x, $y) = @_;
	return unless $self-> {drag_font};
	delete $self-> {drag_font};
	$self-> capture(0);
	$owner-> notify('EndDragFont',
		$::application-> get_widget_from_point( $self-> client_to_screen( $x, $y)));
}

sub Name_SelectItem
{
	my ( $owner, $self, $index, $state) = @_;
	my $sz  = $owner-> {logFont}-> {size};
	my $fn = $owner-> reset_sizelist(1);
	$owner-> Size-> InputLine-> text( $sz);
	$owner-> apply( name => $fn, size => $sz, encoding => $owner-> Encoding-> text);
}

sub Size_Change
{
	my ( $owner, $self) = @_;
	my $sz = $self-> text;
	return unless $sz =~ m/^\s*([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?\s*$/;
	return if $sz < 2 or $sz > 2048;
	$owner-> apply( size => $sz);
}

sub Encoding_Change
{
	my ( $owner, $self) = @_;
	my $sz = $owner-> {logFont}-> {size};
	my $fn = $owner-> reset_sizelist(0);
	$owner-> Size-> InputLine-> text( $sz);
	$owner-> apply( size => $sz, encoding => $owner-> Encoding-> text);
}

sub FontStyleButton_Click
{
	my $self = $_[0];
	my $v    = $self-> Style-> value;
	$self -> apply( style => 0 |
		(( $v & 1) ? fs::Bold       : 0) |
		(( $v & 2) ? fs::Italic     : 0) |
		(( $v & 4) ? fs::Underlined : 0) |
		(( $v & 8) ? fs::StruckOut  : 0)
	);
}


sub set_fixed_only
{
	my ( $self, $fo) = @_;
	return if $fo == $self-> {fixedOnly};
	$self-> {fixedOnly} = $fo;
	$self-> refresh_fontlist;
}

sub logFont
{
	my $self = $_[0];
	return $self-> Sample-> Example-> get_font unless $#_;
	$self-> {logFont} = $self-> font_match( $_[1], $self-> {logFont}, 1);
	$self-> logfont_to_view;
	$self-> apply( %{$self-> {logFont}});
}

sub showHelp         { ($#_)? shift-> raise_ro('showHelp')  : return $_[0]-> {showHelp}};
sub fixedOnly        { ($#_)? shift-> set_fixed_only($_[1]) : return $_[0]-> {fixedOnly}};

1;

__DATA__

=head1 NAME

Prima::FontDialog - standard font dialog

=head1 SYNOPSIS

	use Prima::FontDialog;
	my $f = Prima::FontDialog-> create;
	return unless $f-> execute == mb::OK;
	$f = $f-> logFont;
	print "$_:$f->{$_}\n" for sort keys %$f;

=head1 DESCRIPTION

The dialog provides selection of font by name, style, size, and encoding.
The font selected is returned by L<logFont> property.

=head1 API

=head2 Properties

=over

=item fixedOnly BOOLEAN

Selects whether only the fonts of fixed pitch ( 1 ) or all fonts ( 0 )
are displayed in the selection list.

Default value: 0

=item logFont FONT

Provides access to the interactive font selection as a hash reference.
FONT format is fully compatible with C<Prima::Drawable::font>.

=item showHelp BOOLEAN

Create-only property.

Specifies if the help button is displayed in the dialog.

Default value: 0

=back

=head2 Events

=over

=item BeginDragFont

Called when the user starts dragging a font from the font sample widget by
left mouse button.

Default action reflects the status in the dialog title

=item EndDragFont $WIDGET

Called when the user releases the mouse drag over a Prima widget.
Default action applies currently selected font to $WIDGET.

=back


=head1 AUTHOR

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

=head1 SEE ALSO

L<Prima>, L<Prima::Window>, L<Prima::Drawable>.

=cut