#!/usr/bin/perl -w

#$id: $

eval 'exec /usr/bin/perl -w -S $0 ${1+"$@"}'
    if 0; # not running under some shell

require 5.004;

use Tk 800.000;
use Tk::Zinc;   # only for getting $Tk::Zinc::VERSION
use lib Tk->findINC('demos/widget_lib');
use Tk::widgets qw/Dialog ErrorDialog ROText/;
use WidgetDemo;
use subs qw/invoke lsearch see_code see_vars show_stat view_widget_code/;
use vars qw/$MW $FONT $WIDTRIB/;
use vars qw/$CODE $CODE_RERUN $CODE_TEXT $VARS $VIEW $VIEW_TEXT/;
use vars qw/$BRAKES $LIGHTS $OIL $SOBER $TRANS $WIPERS/;
use vars qw/$COLOR $FONT_STYLE $POINT_SIZE $DEMO_FILE %DEMO_DESCRIPTION/;
use strict;

use vars qw( $VERSION );
($VERSION) = sprintf("%d.%02d", q$Revision$ =~ /(\d+)\.(\d+)/);

my $version = $Tk::Zinc::VERSION;
print "Tkzinc version: $version\n";

$MW = Tk::MainWindow->new;
$MW->configure(-menu => my $menubar = $MW->Menu);

{
    package WidgetWrap;
    @WidgetWrap::ISA = qw/Tk::MainWindow/;

    # This magic conspires with widget's AUTOLOAD subroutine to make user
    # contributed demonstrations that don't use WidgetDemo embed properly.
    # The trick works because widget creates a superclass of Tk::MainWindow
    # which invokes WidgetDemo() implicitly. You loose if you bypass the
    # inheritance mechanism and call Tk::MainWindow directly.

    sub new {
	my ($name) = $::DEMO_FILE =~ m#([^/]+).pl$#;
	$::MW->WidgetDemo(-name => $name, -text => $::DEMO_DESCRIPTION{$name} || "" );
    }
}

@MainWindow::ISA = 'WidgetWrap';

$MW->title('TkZinc Perl demonstrations');
$FONT = '-*-Helvetica-Medium-R-Normal--*-140-*-*-*-*-*-*';
my $widget_lib = Tk->findINC('demos/widget_lib');
# the previous simple statement $zinc_lib = Tk->findINC('demos/zinc_lib');
# found in some cases such old directory empty (e.g. after a previous package de-installation)
# So now, we look for a non-empty demos/zinc_lib directory (ie containing one of the demo!)
my $zinc_lib = Tk->findINC('demos/zinc_lib/tiger.pl');
($zinc_lib) = $zinc_lib =~ /(.*)\/tiger\.pl/;
my $wd = "$widget_lib/WidgetDemo.pm";
$WIDTRIB = Tk->findINC('demos/zinc_contrib_lib/README');
($WIDTRIB) = $WIDTRIB =~ /(.*)\/README/;
unless (Tk::tainting) {
    $WIDTRIB = $ENV{WIDTRIB} if defined $ENV{WIDTRIB};
    $WIDTRIB = $ARGV[0] if defined $ARGV[0];
}

# The code below creates the main window, consisting of a menu bar
# and a text widget that explains how to use the program, plus lists
# all of the demos as hypertext items.

my $file = $menubar->cascade(qw/-label File -underline 0 -menuitems/ =>
    [
      [cascade    => '~View', -menuitems =>
        [
          [command  => '~zinc-demos', -command => [\&view_widget_code, __FILE__]],
          [command  => '~WidgetDemo', -command => [\&view_widget_code, $wd]],
        ], # end cascade menuitems
      ], # end view cascade
      '',
      [command    => '~Quit', -command => [\&exit]],
    ]);

my $help = $menubar->cascade(qw/-label Help -underline 0 -menuitems/ =>
    [
      [command    => '~About'],
    ]);

my $T = $MW->Scrolled('ROText',
    -scrollbars => 'e',		
    -wrap       => 'word',
    -width      => 60,
    -height     => 30,
    -font       => $FONT,
    -setgrid    => 1,
)->grid(qw/-sticky nsew/);
$MW->gridRowconfigure(   0, -weight => 1); # allow expansion in both ...
$MW->gridColumnconfigure(0, -weight => 1); # ... X and Y dimensions

my $STATUS_VAR;
my $status = $MW->Label(-textvariable => \$STATUS_VAR, qw/-anchor w/);
$status->grid(qw/-sticky ew/);

# Create a bunch of tags to use in the text widget, such as those for
# section titles and demo descriptions.  Also define the bindings for
# tags.

$T->tagConfigure(qw/title -font -*-Helvetica-Bold-R-Normal--*-180-*-*-*-*-*-*/);
$T->tagConfigure(qw/demo -lmargin1 1c -lmargin2 1c -foreground blue/);

if ($MW->depth  == 1) {
    $T->tagConfigure(qw/hot -background black -foreground white/);
    $T->tagConfigure(qw/visited -lmargin1 1c -lmargin2 1c -underline 1/);
} else {
    $T->tagConfigure(qw/hot -relief raised -borderwidth 1 -foreground red/);
    $T->tagConfigure(qw/visited -lmargin1 1c -lmargin2 1c -foreground/ =>
	    '#303080');
}

$T->tagBind(qw/demo <ButtonRelease-1>/ => \&invoke);
my $last_line = '';
$T->tagBind(qw/demo <Enter>/ => [sub {
	my($text, $sv) = @_;
	my $e = $text->XEvent;
	my($x, $y) = ($e->x, $e->y);
	$last_line = $text->index("\@$x,$y linestart");
	$text->tagAdd('hot', $last_line, "$last_line lineend");
	$text->configure(qw/-cursor hand2/);
	show_stat $sv, $text, $text->index('current');
    }, \$STATUS_VAR]
);
$T->tagBind(qw/demo <Leave>/ => [sub {
	my($text, $sv) = @_;
	$text->tagRemove(qw/hot 1.0 end/);
	$text->configure(qw/-cursor xterm/);
	$$sv = '';
    }, \$STATUS_VAR]
);
$T->tagBind(qw/demo <Motion>/ => [sub {
	my($text, $sv) = @_;
	my $e = $text->XEvent;
	my($x, $y) = ($e->x, $e->y);
	my $new_line = $text->index("\@$x,$y linestart");
	if ($new_line ne $last_line) {
	    $text->tagRemove(qw/hot 1.0 end/);
	    $last_line = $new_line;
	    $text->tagAdd('hot', $last_line, "$last_line lineend");
	}
	show_stat $sv, $text, $text->index('current');
    }, \$STATUS_VAR]
);

# Create the text for the text widget.

$T->insert('end', "TkZinc perl Demonstrations ($version)\n", 'title');
$T->insert('end',
"\nThis application provides a front end for several short scripts in perl/Tk that demonstrate what you can do with the TkZinc widget.  Each of the numbered lines below describes a demonstration;  you can click on it to invoke the demonstration.  Once the demonstration window appears, you can click the \"See Code\" button to see the Perl/Tk code that created the demonstration.\n");

$T->insert('end', "\n", '', "Small applications\n", 'title');
$T->insert('end', "1. A simple animated application \"the Wheel of Fortune\".\n", [qw/demo demo-wheelOfFortune/]);
$T->insert('end', "2. A simple radar display.\n", [qw/demo demo-simpleradar/]);
$T->insert('end', "3. Zetris a clone of the famous tetris game (requires openGL.)\n", [qw/demo demo-Zetris/]);
$T->insert('end', "4. ATC sample fake electronic strips (nicer with openGL.)\n", [qw/demo demo-groups_in_ATC_strips/]);
$T->insert('end', "5. The famous tiger using the X11 shape extension. (nicer with openGL)\n", [qw/demo demo-tiger/]);
$T->insert('end', "6. A magic lens based on Graphics.pm. (nicer with openGL)\n", [qw/demo demo-MagicLens/]);


$T->insert('end', "\n", '', "All Items\n", 'title');
$T->insert('end', "1. Examples of all items.\n", [qw/demo demo-items/]);
$T->insert('end', "2. All items options (and their types).\n", [qw/demo demo-all_options/]);
$T->insert('end', "3. Examples of line style and line termination.\n", [qw/demo demo-lines/]);
$T->insert('end', "4. Curves with multiple contours.\n", [qw/demo demo-contours/]);
$T->insert('end', "5. Examples of labelformat.\n", [qw/demo demo-labelformat/]);
$T->insert('end', "6. Use of mapinfos.\n", [qw/demo demo-mapinfo/]);
$T->insert('end', "7. Curves with cubic bezier control points.\n", [qw/demo demo-curve_bezier/]);
$T->insert('end', "8. Curves with multiple contours and various fillrule.\n", [qw/demo demo-fillrule/]);


$T->insert('end', "\n", '', "Groups, Priority, Clipping and PathTags\n", 'title');
$T->insert('end', "1. Groups and Priorities.\n", [qw/demo demo-groups_priority/]);
$T->insert('end', "2. Clipping examples (with simple or multiple contours).\n", [qw/demo demo-clipping/]);
$T->insert('end', "3. Group atomicity.\n", [qw/demo demo-atomic-groups/]);
$T->insert('end', "4. \"Windows\" with four glasses using curve with multiple contours.\n", [qw/demo demo-window-contours/]);
$T->insert('end', "5. A counter quite impossible to do without clipping (requires openGL).\n", [qw/demo demo-counter/]);
$T->insert('end', "6. Using pathTags.\n", [qw/demo demo-path_tags/]);

$T->insert('end', "\n", '', "Interactions\n", 'title');
$T->insert('end', "1. Simple interaction on a track.\n", [qw/demo demo-simple_interaction_track/]);
$T->insert('end', "2. Text input in a text item and a track item.\n", [qw/demo demo-textInput/]);


$T->insert('end', "\n", '', "Transformation\n", 'title');
$T->insert('end', "1. Translating.\n", [qw/demo demo-translation/]);
$T->insert('end', "2. Rotating.\n",    [qw/demo demo-rotation/]);
$T->insert('end', "3. Zooming.\n",     [qw/demo demo-zoom/]);
$T->insert('end', "4. Transformation testbed.\n",     [qw/demo demo-transforms/]);
$T->insert('end', "5. Zooming/Rotating icon and text. (even without openGL)\n",     [qw/demo demo-icon_zoom_resize/]);

$T->insert('end', "\n", '', "Use of openGL\n", 'title');
$T->insert('end', "1. A zoomable/rotatable TkZinc Logo (better with openGL).\n",  [qw/demo demo-tkZincLogo/]);
$T->insert('end', "2. Axial color variation on the X axis (requires openGL).\n", [qw/demo demo-color-x/]);
$T->insert('end', "3. Axial color variation on the Y axis (requires openGL).\n", [qw/demo demo-color-y/]);
$T->insert('end', "4. Circular color variation (requires openGL).\n", [qw/demo demo-color-circular/]);
$T->insert('end', "5. Path and Conical color variations (requires openGL).\n", [qw/demo demo-color-path-and-conic/]);
$T->insert('end', "6. The triangles item (requires openGL).\n",  [qw/demo demo-triangles/]);
$T->insert('end', "7. A set of demos based on Graphics.pm module (really better with openGL).\n",  [qw/demo demo-testGraphics/]);



$T->insert('end', "\n", '', "User Contributed Demonstrations\n", 'title');
opendir(C, $WIDTRIB) or warn "Cannot open $WIDTRIB: $!";
my(@dirent) = grep /^.+\.pl$/, sort(readdir C);
closedir C;
unshift @dirent, 'TEMPLATE.pl';	# I want it first
my $i = 0;
while ($_ = shift @dirent) {
    next if /TEMPLATE\.pl/ and $i != 0;
    unless (open(C, "$WIDTRIB/$_")) {
	warn "Cannot open $_: $!" unless /TEMPLATE\.pl/;
	next;
    }
    my($name) = /^(.*)\.pl$/;
    $_ = <C>; $_ = <C>; 
    my($title) = /^#\s*(.*)$/;
    $DEMO_DESCRIPTION{$name} = $title;
    close C;
    $T->insert('end', ++$i . ". $title\n", ['demo', "demo-$name"]);
}

# Create all the dialogs required by this demonstration.

my $DIALOG_ABOUT = $MW->Dialog(
    -title          => 'About zinc-demos',
    -bitmap         => 'info',
    -default_button => 'OK',
    -buttons        => ['OK'],
    -text           => "TkZinc Perl demonstrations\n\nPerl Version $]" .
		       "\nTk Version $Tk::VERSION" .
                       "\nTkZinc Version $Tk::Zinc::VERSION\n",
);
$help->cget(-menu)->entryconfigure('About',
    -command => [$DIALOG_ABOUT => 'Show'],
);

my $DIALOG_ICON = $MW->Dialog(
    -title          => 'Bitmap Menu Entry',
    -bitmap         => undef,
    -default_button => 'OK',
    -buttons        => ['OK'],
    -text           => 'The menu entry you invoked displays a bitmap rather than a text string.  Other than this, it is just like any other menu entry.',
);
$DIALOG_ICON->configure(-bitmap => undef); # keep -w from complaining

MainLoop;

sub AUTOLOAD {

    # This routine handles the loading of most demo methods.

    my($demo) = @_;

    $T->Busy;
    {
	$DEMO_FILE = "$WIDTRIB/${demo}.pl" if -f "$WIDTRIB/${demo}.pl";
	$DEMO_FILE = "$zinc_lib/${demo}.pl" if -f "$zinc_lib/${demo}.pl";
	if (defined $DEMO_FILE) {
	    do $DEMO_FILE ;
	} else { warn "No such demo: $demo.pl in either $WIDTRIB/ or $zinc_lib/\n"; }
	warn $@ if $@;
    }
    $T->Unbusy;
    goto &$::AUTOLOAD if defined &$::AUTOLOAD;

} # end AUTOLOAD

sub invoke {

    # This procedure is called when the user clicks on a demo description.

    my($text) = @_;

    my $index = $text->index('current');
    my @tags = $T->tagNames($index);
    my $i = lsearch('demo\-.*', @tags);
    return if $i < 0;
    my($demo) = $tags[$i] =~ /demo-(.*)/;
    $T->tagAdd('visited', "$index linestart", "$index lineend");
    {
	no strict 'refs';
	&$demo($demo);
    }

} # end invoke

sub lsearch {

    # Search the list using the supplied regular expression and return it's
    # ordinal, or -1 if not found.

    my($regexp, @list) = @_;
    my($i);

    for ($i=0; $i<=$#list; $i++) {
        return $i if $list[$i] =~ /$regexp/;
    }
    return -1;

} # end lsearch

sub see_code {

    # This procedure creates a toplevel window that displays the code for
    # a demonstration and allows it to be edited and reinvoked.

    my($demo) = @_;

    my $file = "${demo}.pl";
    if (not Exists $CODE) {
	$CODE = $MW->Toplevel;
	my $code_buttons = $CODE->Frame;
	$code_buttons->pack(qw/-side bottom -fill x/);
	my $code_buttons_dismiss = $code_buttons->Button(
            -text    => 'Dismiss',
            -command => [$CODE => 'withdraw'],
	);
	$CODE_RERUN = $code_buttons->Button(-text => 'Rerun Demo');
	$CODE_TEXT = $CODE->Scrolled('Text',
				     qw/-scrollbars e -height 40 -setgrid 1/);
	$code_buttons_dismiss->pack(qw/-side left -expand 1/);
	$CODE_RERUN->pack(qw/-side left -expand 1/);
	$CODE_TEXT->pack(qw/-side left -expand 1 -fill both/);
    } else {
	$CODE->deiconify;
	$CODE->raise;
    }
    $CODE_RERUN->configure(-command => sub {
	eval $CODE_TEXT->get(qw/1.0 end/);
	{
	    no strict 'refs';
	    &$demo($demo);
	}
    });
    $CODE->iconname($file);
    $file = "$WIDTRIB/${demo}.pl" if -f "$WIDTRIB/${demo}.pl";
    $file = "$zinc_lib/${demo}.pl" if -f "$zinc_lib/${demo}.pl";
    $CODE->title("Demo code: $file");
    $CODE_TEXT->delete(qw/1.0 end/);
    open(CODE, "<$file") or warn "Cannot open demo file $file: $!";
    {
	local $/ = undef;
	$CODE_TEXT->insert('1.0', <CODE>);
    }
    close CODE;
    $CODE_TEXT->markSet(qw/insert 1.0/);

} # end see_code

sub see_vars {

    # Create a top-level window that displays a bunch of global variable values
    # and keeps the display up-to-date even when the variables change value.
    # $args is a pointer to a list of list of 2:
    #
    #   ["variable description", \$VAR]
    #
    # The old trick of passing a string to serve as the description and a soft
    # reference to the variable no longer works with lexicals and use strict.

    my($parent, $args) = @_;

    $VARS->destroy if Exists($VARS);
    $VARS = $parent->Toplevel;
    $VARS->geometry('+300+300');
    $VARS->title('Variable Values');
    $VARS->iconname('Variables');

    my $title = $VARS->Label(
        -text   => 'Variable Values:',
        -width  => 20,
        -anchor => 'center',
        -font   => '-*-helvetica-medium-r-normal--*-180-*-*-*-*-*-*',
    );
    $title->pack(qw/-side top -fill x/);
    my($label, $var);
    foreach my $i (@$args) {
	($label, $var) = @$i;
	my $wf = $VARS->Frame->pack(qw/-anchor w/);
	$wf->Label(-text => "$label: ")->pack(qw/-side left/);
	$wf->Label(-textvariable => $var)->pack(qw/-side left/);
    }
    $VARS->Button(-text => 'OK', -command => [$VARS => 'destroy'])->
        pack(qw/-side bottom -pady 2/);

} # end see_vars

sub show_stat {

    # Display name of current demonstration.  $sv is a reference to the
    # status Label -textvariable, $text is the Text widget reference and
    # $index is the demonstration index in the Text widget.

    my($sv, $text, $index) = @_;

    my @tags = $text->tagNames($index);
    my $i = lsearch('demo\-.*', @tags);
    return if $i < 0;
    my($demo) = $tags[$i] =~ /demo-(.*)/;
    $$sv = "Click Button-1 to run the \"$demo\" demonstration.";

} # end show_stat

sub view_widget_code {

    # Expose a file's innards to the world too, but only for viewing.

    my($widget) = @_;

    if (not Exists $VIEW) {
	$VIEW = $MW->Toplevel;
	$VIEW->iconname('widget');
	my $view_buttons = $VIEW->Frame;
	$view_buttons->pack(qw/-side bottom -expand 1 -fill x/);
	my $view_buttons_dismiss = $view_buttons->Button(
            -text    => 'Dismiss',
            -command => [$VIEW => 'withdraw'],
	);
	$view_buttons_dismiss->pack(qw/-side left -expand 1/);
	$VIEW_TEXT = $VIEW->Scrolled('Text',
				     qw/-scrollbars e -height 40 -setgrid 1/);
	$VIEW_TEXT->pack(qw/-side left -expand 1 -fill both/);
    } else {
	$VIEW->deiconify;
	$VIEW->raise;
    }
    $VIEW->title("Demo code: $widget");
    $VIEW_TEXT->configure(qw/-state normal/);
    $VIEW_TEXT->delete(qw/1.0 end/);
    open(VIEW, "<$widget") or warn "Cannot open demo file $widget: $!";
    {
	local $/ = undef;
	$VIEW_TEXT->insert('1.0', <VIEW>);
    }
    close VIEW;
    $VIEW_TEXT->markSet(qw/insert 1.0/);
    $VIEW_TEXT->configure(qw/-state disabled/);

} # end view_widget_code

__END__

=head1 NAME

zinc-demos - Demonstration of TkZinc widget functionnality

=head1 SYNOPSYS

  zinc-demos [ directory ]

=head1 DESCRIPTION

This script demonstrates the various functions offered by Tk Zinc widget.
This file only contains code to
generate the main window for the application, which invokes individual
demonstrations.  The code for the actual demonstrations is contained in
separate ".pl" files in the "zinc_lib" directory, which are autoloaded
by this script as needed.

widget looks in the directory specified on the command line to load user
contributed demonstrations.  If no directory name is specified when widget is
invoked and the environment variable WIDTRIB is defined then demonstrations
are loaded from the WIDTRIB directory. If WIDTRIB is undefined then widget
defaults to the released user contributed directory, "zinc_contrib_lib".

=head2 History

 #
 # Stephen O. Lidie, LUCC, 96/03/11.  lusol@Lehigh.EDU
 # Stephen O. Lidie, LUCC, 97/01/01.  lusol@Lehigh.EDU
 # Stephen O. Lidie, LUCC, 97/02/11.  lusol@Lehigh.EDU
 # Stephen O. Lidie, LUCC, 97/06/07.  lusol@Lehigh.EDU
 #     Update for Tk402.00x.  Total revamp:  WidgetDemo, Scrolled, released
 #     composites, -menuitems, qw//, etcetera.  Perl 5.004 required.
 # Stephen O. Lidie, LUCC, 98/03/10.  lusol@Lehigh.EDU
 #     Update for Tk8.
 # Stephen O. Lidie, LUCC, 98/06/26.  Stephen.O.Lidie@Lehigh.EDU
 #     Add Common Dialogs for Tk800.007.
 # Stephen.O.Lidie@Lehigh.EDU, 1999/11/29, Lehigh University.
 #     Demo some "dash patch" changes.
 # Stephen.O.Lidie@Lehigh.EDU, 2000/01/11, Lehigh University.
 #     Update menubar to Tk 8, fix color palette Menubutton demo.
 # Stephen.O.Lidie@Lehigh.EDU, 2000/07/06, Lehigh University.
 #     Remove inswt() from widget and styles.pl to show the proper Perl/Tk
 #     idiom for inserting Text tags.  Various and sundry cleanups.
 # Christophe Mertz <mertz@cena.fr>, 2002/03/06, CENA fr
 #     adaptation for zinc demos purposes.

=head1 AUTHOR

Steve Lidie <Stephen.O.Lidie@Lehigh.EDU> and slight adaptation by Christophe Mertz <mertz@cena.fr>

=head1 SEE ALSO

The zinc documentation is available as a pdf file refman.pdf and as an html pages refman/index.html

=cut