<?php
// $Id: slideshow.php 11766 2007-03-29 08:39:27Z elixir_julian $
/*
==============================================================================
	Dokeos - elearning and course management software

	Copyright (c) 2004 Dokeos S.A.
	Copyright (c) 2003 Ghent University (UGent)
	Copyright (c) 2001 Universite catholique de Louvain (UCL)

	For a full list of contributors, see "credits.txt".
	The full license can be read in "license.txt".

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	See the GNU General Public License for more details.

	Contact: Zhong 	poopsoft@163.com
==============================================================================
*/
/**
============================================================================== 
*	@author Patrick Cool
*	@package iilearn.document
============================================================================== 
*/
/*
==============================================================================
Developped by Patrick Cool
patrick.cool@UGent.be
Ghent University
Mai 2004
http://icto.UGent.be

Please bear in mind that this is only an alpha release. 
I wrote this quite quick and didn't think too much about it in advance. 
It is not perfect at all but it is workable and usefull (I think)
Do not consider this as a powerpoint replacement, although it has
the same starting point. 
==============================================================================
*/

/*
==============================================================================
Description:
	This is a plugin for the documents tool. It looks for .jpg, .jpeg, .gif, .png
	files (since these are the files that can be viewed in a browser) and creates
	a slideshow with it by allowing to go to the next/previous image.
	You can also have a quick overview (thumbnail view) of all the images in 
	that particular folder.
	Each slideshow is folder based. Only the images of the chosen folder are shown. 
==============================================================================
*/
// including the language file

// name of the language file that needs to be included 
$language_file = "slideshow";

include ('../inc/global.inc.php');

$noPHP_SELF = true;

$path = $_GET['curdirpath'];
$pathurl = urlencode($path);

$slide_id = $_GET['slide_id'];

if ($path and $path <> "")
{
	$folder = $path."/";
}
else
{
	$folder = "";
}
$sys_course_path = api_get_path(SYS_COURSE_PATH);

// including the functions for the slideshow
include ('slideshow.inc.php');

// breadcrumb navigation
$url = "document.php?curdirpath=".$pathurl;
$originaltoolname = get_lang('Documents');
$interbreadcrumb[] = array ("url" => $url, "name" => $originaltoolname);

// because $nametools uses $_SERVER['PHP_SELF'] for the breadcrumbs instead of $_SERVER['REQUEST_URI'], I had to 
// bypass the $nametools thing and use <b></b> tags in the $interbreadcrump array
$url = "slideshow.php?curdirpath=".$pathurl;
$originaltoolname = get_lang('SlideShow');
//$interbreadcrumb[]= array ("url"=>$url, "name"=>$originaltoolname );

Display :: display_header($originaltoolname, "Doc");

// loading the slides from the session
$image_files_only = $_SESSION["image_files_only"];

// calculating the current slide, next slide, previous slide and the number of slides
if ($slide_id <> "all")
{
	if ($slide_id)
	{
		$slide = $slide_id;
	}
	else
	{
		$slide = 0;
	}
	$previous_slide = $slide -1;
	$next_slide = $slide +1;
} // if ($slide_id<>"all")
$total_slides = count($image_files_only);
?>
<script language="JavaScript" type="text/JavaScript">
<!--
function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->
</script>


<p></p>
<table width="100%" border="0" cellspacing="0" cellpadding="2">
  <tr>
    <td>
	<?php

if ($slide > 0)
{
	echo "<a href='slideshow.php?slide_id=".$previous_slide."&curdirpath=$pathurl'>";
}
?>
	<strong>&lt;&lt; <?php echo get_lang('_previous_slide'); ?></strong>	<?php

if ($slide > 0)
{
	echo "</a>";
}
?>
	&nbsp;|&nbsp;
	<?php

if ($slide < $total_slides -1 and $slide_id <> "all")
{
	echo "<a href='slideshow.php?slide_id=".$next_slide."&curdirpath=$pathurl'>";
}
?>
	<strong><?php echo get_lang('_next_slide'); ?> &gt;&gt;</strong>
	<?php

if ($slide > 0)
{
	echo "</a>";
}
?>
	</td>
    <td>
	<?php

if ($slide_id <> "all")
{
	echo get_lang('_image')." ".$next_slide." ".get_lang('_of')." ".$total_slides;
}
?>
	</td>
    <td align="right"><a href="document.php?action=exit_slideshow&curdirpath=<?php echo $pathurl;?>"><?php echo get_lang('_exit_slideshow');?></a> </td>
  </tr>
  <tr>
    <td>
		<?php

if ($slide_id <> "all")
{
	echo "<a href='slideshow.php?slide_id=all&curdirpath=".$pathurl."'>".get_lang('_show_thumbnails')."</a>";
}
else
{
	echo get_lang('_click_thumbnails');
}
$image = $sys_course_path.$_course['path']."/document/".$folder.$image_files_only[$slide];

// EXIF DATA, remove "and 0==1" in the if statement if you want to display the EXIT data in a popup
//if (exif_read_data($image))
//	{ 
//	$_SESSION["exif_image"]=$image; 
//
// 	echo "| <a href='#'  onClick='MM_openBrWindow('exifinfo.php?image=".$slide."&amp;path=".$path."','exifinfo','scrollbars=yes,resizable=yes,width=500,height=400')'>Show Exif metadata</a>";
//	}
?>
	</td>
    <td><?php echo htmlspecialchars($image_files_only[$slide]) ?></td>
    <td align="right"><a href="slideshowoptions.php?curdirpath=<?php echo $pathurl; ?>"><?php echo get_lang('_set_slideshow_options');?></a></td>
  </tr>
</table>
<?php

// =======================================================================
//				TREATING THE POST DATA FROM SLIDESHOW OPTIONS
// =======================================================================
// if we come from slideshowoptions.php we sessionize (new word !!! ;-) the options
if (isset ($_POST['Submit'])) // we come from slideshowoptions.php
{
	$_SESSION["image_resizing"] = $_POST['radio_resizing'];
	if ($_POST['radio_resizing'] == "resizing" && $_POST['width'] != '' && $_POST['height'] != '')
	{
		//echo "resizing"; 
		$_SESSION["image_resizing_width"] = $_POST['width'];
		$_SESSION["image_resizing_height"] = $_POST['height'];
	}
	else
	{
		//echo "unsetting the session heighte and width"; 
		$_SESSION["image_resizing_width"] = null;
		$_SESSION["image_resizing_height"] = null;
	}
} // if ($submit)

// The target height and width depends if we choose resizing or no resizing
if ($_SESSION["image_resizing"] == "resizing")
{
	$target_width = $_SESSION["image_resizing_width"];
	$target_height = $_SESSION["image_resizing_height"];
}
else
{
	$image_width = $source_width;
	$image_height = $source_height;
}

// =======================================================================
//						THUMBNAIL VIEW
// =======================================================================
// this is for viewing all the images in the slideshow as thumbnails. 
$image_tag = array ();
if ($slide_id == "all")
{
	$thumbnail_width = 100;
	$thumbnail_height = 100;
	$row_items = 4;

	foreach ($image_files_only as $one_image_file)
	{
		$image = $sys_course_path.$_course['path']."/document/".$folder.$one_image_file;
		$image_height_width = resize_image($image, $thumbnail_width, $thumbnail_height, 1);

		$image_height = $image_height_width[0];
		$image_width = $image_height_width[1];
		if ($path and $path !== "/")
		{
			$doc_url = $path."/".$one_image_file;
		}
		else
		{
			$doc_url = $path.$one_image_file;
		}
		$image_tag[] = "<img src='download.php?doc_url=".$doc_url."' border='0' width='".$image_width."' height='".$image_height."'>";
	} // foreach ($image_files_only as $one_image_file)
} // if ($slide_id=="all")

// creating the table
echo "\n<table align='center'>";
$i = 0;
foreach ($image_tag as $image_tag_item)
{
	// starting new table row
	if ($i == 0)
	{
		echo "\n<tr>\n";
	}
	echo "\t<td><a href='slideshow.php?slide_id=".$i."&curdirpath=".$pathurl."'>".$image_tag_item."</a></td>\n";
	if ($i % 3 == 0 and $i !== 0)
	{
		echo "</tr>\n<tr>\n";
	}
	$i ++;
}
echo "</table>\n\n";

// =======================================================================
//						ONE AT A TIME VIEW
// =======================================================================
// this is for viewing all the images in the slideshow one at a time. 
if ($slide_id !== "all")
{
	$image = $sys_course_path.$_course['path']."/document/".$folder.$image_files_only[$slide];
	$image_height_width = resize_image($image, $target_width, $target_height);

	$image_height = $image_height_width[0];
	$image_width = $image_height_width[1];

	if ($_SESSION["image_resizing"] == "resizing")
	{
		$height_width_tags = "width='$image_width' height='$image_height'";
	}

	// showing the comment of the image, Patrick Cool, 8 april 2005
	// this is done really quickly and should be cleaned up a little bit using the API functions
	$tbl_documents = Database::get_course_table(TABLE_DOCUMENT);
	if ($path=='/')
	{
		$pathpart='/';
	}
	else 
	{
		$pathpart=$path.'/'; 
	}
	$sql = "SELECT * FROM $tbl_documents WHERE path='".$pathpart.$image_files_only[$slide]."'";
	$result = api_sql_query($sql,__FILE__,__LINE__);
	$row = mysql_fetch_array($result);
	echo $row['comment'];

	echo "<center><img src='download.php?doc_url=$path/".$image_files_only[$slide]."' border='0' $height_width_tags></center>";
} // if ($slide_id!=="all")

Display :: display_footer();
?>

