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United-Forum Nivo Slider Widget · **Released**: 07-17-2011

Based on the Nivo Slider - all credit for slider awesomeness goes to them.

vB4 implementation goes to me.

What it is:
A slider for cms articles, it gets the articles via database, uses (if possible) the previewimage there and resizes it to slider size *update 1.1.0 cropping function included.

Livedemo on a Big Board (>2.000.000 posts)
the nivo slider on our site is customized to fit our heavily customized cms. Default look of this addon is shown in the picture below

facts about the nivo slider

Quote:

Originally Posted by nivo slider homepage

- ~ 600.000 downloads
- 16 transition effects
- a ton of options
- different available themes
- ...

Installation

upload all files (attached zip file) in the folder where you do need them - this has to be the same folder you will set via $slider_img_filepath (see picture)

create a new php-widget and insert the following code:

Code:

// DEBUG MODUS !
$debug_modus = false;

if($debug_modus === false)
{
	ob_start();
}

//nivo slider - uf - vb.org version
//set these values as you need them:

//your slider folder - has to be read and writeable
//folder where all slider files are saved
$slider_img_filepath = 'external/unitedforum/slider/';   

//picture width and height !same as in the CSS FILE!
$maxwidth = 650;                                  
$maxheight = 250;    

//do you want images without previewimage to be shown? slider is using the fallback then
$show_articles_without_image = false;           

//picture shown if your articles has no previewpicture
$fallback_img = $slider_img_filepath . 'uf_fallback_slider.png';  

//hardcoded maximum is 20 - if you want more just ask
$number_of_articles_shown = 10;                                
            
//lengh in characters of the article descriptions
$description_length = 95;

//stretch picture or crop them? false = strechting (default) true = cropping (beta)
$crop = false;


//Debug Messages
if($debug_modus)
{
	echo "<span style='color:red;'>DEBUG MODE is ON! </span><br />";
	echo "slider_img_filepath: $slider_img_filepath <br />";
	echo "width: $maxwidth   height: $maxheight <br />";
	echo "Strech or Crop? $crop <br />";
	echo "show_articles_without_image: "; 
        var_dump($show_articles_without_image); 
        echo " <br />";
	echo "fallback_img: $fallback_img <br />";
	echo "#img: $number_of_articles_shown <br />";
	echo "description_length: $description_length <br />";
	echo 'directory ' . DIR . '<br />';

}




$article_type = vb_Types::instance()->getContentTypeID("vBCms_Article");
$time = TIMENOW;
 
if(!extension_loaded('gd'))
{
	echo '<span style="color:red">Error occurred:</span> Your System does not support the GD-Libary. Please install the GD-Libary.<br />';
}
       
	$article_get = vB::$db->query_read('
        SELECT
            article.pagetext,
            article.previewimage,
            node.url,
            node.publishdate,
            node.parentnode,
            parentnode.url AS parenturl,
            thread.replycount,
            info.title,
            node.nodeid,            
            GROUP_CONCAT( category.category )
        FROM
            '.TABLE_PREFIX.'cms_article AS article INNER JOIN
            '.TABLE_PREFIX.'cms_node AS node 
                ON (node.contentid = article.contentid AND node.contenttypeid = ' . vb::$db->sql_prepare($article_type) .') INNER JOIN
            '.TABLE_PREFIX.'cms_nodeinfo AS info 
                ON info.nodeid = node.nodeid INNER JOIN
            '.TABLE_PREFIX.'cms_node AS parentnode 
                ON parentnode.nodeid = node.parentnode LEFT JOIN
            '.TABLE_PREFIX.'thread AS thread ON thread.threadid = info.associatedthreadid LEFT JOIN
            '.TABLE_PREFIX.'cms_nodecategory AS nodecategory ON nodecategory.nodeid = node.nodeid LEFT JOIN
            '.TABLE_PREFIX.'cms_category AS category ON nodecategory.categoryid = category.categoryid 
        WHERE
            node.setpublish = 1 AND
            node.publishdate > '. vb::$db->sql_prepare($time) .' -34560000 AND
			node.publishdate < '. vb::$db->sql_prepare($time) .' 
        GROUP BY node.nodeid
        ORDER BY node.publishdate
        DESC LIMIT 20');

    $database_articles = array();
    
    /* my version of sorting the articles via relevance - i'll keep it in case someone is interested*/
    while($article = vB::$db->fetch_array($article_get))
    {
        $article['value'] = ( 5 - ($time - $article['publishdate'] ) / 86400 ) * ( 5 - ($time - $article['publishdate'] ) / 86400 ) * ( 5 - ($time - $article['publishdate'] ) / 86400 ) + (10 * $article['replycount']);
        $database_articles[] = $article;        
    }
    
    foreach($database_articles as $c => $key)
    {
        $sort_value[] = $key['value'];
    }
    
    array_multisort($sort_value, SORT_DESC, $database_articles);    
    
    //
    $i = 0;
    $section_array = array();
    $featured_articles = array();
	
    foreach($database_articles AS $article)
    {
        $section_array[$article['parentnode']]++;

        $categories = explode(',' , $article['GROUP_CONCAT( category.category )']);
     
        if($show_articles_without_image == true OR $article['previewimage'])
        {
            if($section_array[$article['parentnode']] < 50 AND $i < $number_of_articles_shown)
            {
				if($debug_modus == true OR !file_exists($slider_img_filepath . 'slide_' . $article['nodeid'] . '.jpg'))
				{
					//rebuild image to the height and width we want in the slider 
					//called sprite since i got the code from our sprite addon :P
					$sprite = imagecreatetruecolor($maxwidth, $maxheight);
					if(is_resource($sprite) AND $article['previewimage'] )
					{                   				
						$imageinfo = getimagesize($article['previewimage']);
						if(is_array($imageinfo))
						{   
							$image = null;
							switch($imageinfo[2])
							{
								case IMAGETYPE_PNG:
								$image = imagecreatefrompng($article['previewimage']);
								break;
								case IMAGETYPE_GIF:
								$image = imagecreatefromgif($article['previewimage']);
								break;
								case IMAGETYPE_JPEG:
								$image = imagecreatefromjpeg($article['previewimage']);
								break;
								default:
								echo '<span style="color:red">Error occurred:</span> Unknown image format. ' . $article['previewimage']. '<br />';
								break;                        
							}
							
							if(!is_resource($image))
							{
								//resiziing did not work - we are using the fallback image.
								echo '<span style="color:red">Error occurred:</span> imagecreation failed. ' . $article['previewimage']. '<br />';
								$article['previewimage'] = $fallback_img;
							}
							else
							{
								$img_width = $imageinfo[0];
								$img_height = $imageinfo[1];							
								
								if($crop == false)
								{									
									imagecopyresampled($sprite, $image, 0, 0, 0, 0, $maxwidth, $maxheight, $img_width, $img_height );
									imagedestroy($image);
								}
								else
								{
									//cropping
									$ratiox = $maxheight / $img_height ;
									$ratioy = $maxwidth / $img_width ;
									$new_height = $img_height;
									$new_width = $img_width;
									
									if ($maxheight > $img_height OR $maxwidth > $img_width)
									{
										if($ratiox > $ratioy)
										{
											$new_height = round($img_height * $ratiox);
											$new_width = round($img_width * $ratiox);
										}
										else
										{
											$new_height = round($img_height * $ratioy);
											$new_width = round($img_width * $ratioy);
										}										
									}
									$cropx = $new_height - $maxheight;
									$cropy = $new_width - $maxwidth;
									
									imagecopyresampled($sprite, $image, 0, 0, 0, 0, $new_width, $new_height, $img_width, $img_height);
									imagedestroy($image);
									
								}
								
								
								$img_filepath = $slider_img_filepath . 'slide_' . $article['nodeid'] . '.jpg';
								$success = imagejpeg($sprite, DIR  . ($img_filepath[0] != DIRECTORY_SEPARATOR ?  DIRECTORY_SEPARATOR : '') . $img_filepath);
								imagedestroy($sprite);
								if($success)
								{
									$article['previewimage'] = $img_filepath;
								}
								else
								{
									$img_filepath = DIR  . ($img_filepath[0] != DIRECTORY_SEPARATOR ?  DIRECTORY_SEPARATOR : '') . $img_filepath;
									echo '<span style="color:red">Error occurred:</span> imagejpeg failed. ' . $article['previewimage']. '<br />
									directory: '. $img_filepath ;
									
									$article['previewimage'] = $fallback_img;
								}
							}
							
						}
						else
						{
							//resiziing did not work - we are using the fallback image.
							echo '<span style="color:red">Error occurred:</span> picture is not readable.' . $article['previewimage']. '<br /> ';
							$article['previewimage'] = $fallback_img;
						}                  
					}
					else
					{
						//resiziing did not work - we are using the fallback image.
						echo '<span style="color:red">Warning:</span> article has no previewimage or sprite is no ressource. ' . $article['previewimage']. '<br />';
						$article['previewimage'] = $fallback_img;
					}
				}
				else
				{
					//we already have the image, no need to resize or crop anything
					$article['previewimage'] = $slider_img_filepath . 'slide_' . $article['nodeid'] . '.jpg';
				}

                /*remove everything from the previewtext - html and bb. I do not want bold or colored text there. Cut to a decent length.*/        
                $article['pagetext'] = strip_bbcode($article['pagetext'], true, true, false, true, false);

                $article['previewtext'] = strip_tags($article['pagetext'], '<a>');
                    
                $len = $description_length;
                if ( strlen($article['previewtext']) > $len )
                {                    
                    $article['previewtext'] = substr( $article['previewtext'] , 0 , strrpos( substr( $article['previewtext'], 0, $len), ' ' ));
                }   

                $i++;
                //Build Array
                $article_neu = array();
                $article_neu['description'] = '<h2 style="font-weight:bold; font-size: 14px">'. $article['title'].'</h2><span>'. $article['previewtext'] .'</span> <a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '">read on</a>';
                $article_neu['htmlcaptionname'] = 'htmlcaption' . $article['nodeid'] ;
                $article_neu['picture'] = '<a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '"><img src="'.$article['previewimage'].'" alt="" title="#htmlcaption'. $article['nodeid'] . '" /></a>';
                
                $featured_articles[] = $article_neu;
            }
        }
    }
    
    //Randomize Array
    //shuffle($featured_articles);

	//Debug Messages
	if($debug_modus)
	{
		echo '#articles - featured and databasepull ';
		var_dump(count($featured_articles));
		var_dump(count($database_articles));
	}

    
$output_bits = '
    <link rel="stylesheet" href="' .$slider_img_filepath. 'nivo-slider.css" type="text/css" media="screen" />
    <link rel="stylesheet" href="' .$slider_img_filepath. 'nivo-slider_uf_theme.css" type="text/css" media="screen" />
    <div style="height:' . $maxheight . 'px;">
    <div id="wrapper">
        <div class="slider-wrapper theme-uf">
            <div class="ribbon"></div>
            <div id="slider" class="nivoSlider">';
            
                foreach($featured_articles AS $article)
                {
                    $output_bits .= $article['picture'];
                }
            $output_bits .= '
            </div>';
            
            foreach($featured_articles AS $article)
            {
                $output_bits .= '<div id="' . $article['htmlcaptionname'] . '" class="nivo-html-caption">' . $article['description'] .'</div>';
            }
            
            $output_bits .= '         
        </div>

    </div>
    <script type="text/javascript" src="' .$slider_img_filepath. 'jquery-1.6.1.min.js"></script>
    <script type="text/javascript" src="' .$slider_img_filepath. 'jquery.nivo.slider.pack.js"></script>
    <script type="text/javascript">
    $(window).load(function() {
        $("#slider").nivoSlider();
    });
    </script>
    </div>
    ';
        $output = $output_bits;
 
if($debug_modus === false)
{
	ob_end_clean();        
}

set refresh time to something big!
save - add the widget to your layout - enjoy

Custom settings:

At the top of the php-widget code you can see the following:
Code:
// DEBUG MODUS !
$debug_modus = false;

if($debug_modus === false)
{
	ob_start();
}

//nivo slider - uf - vb.org version
//set these values as you need them:

//your slider folder - has to be read and writeable
//folder where all slider files are saved
$slider_img_filepath = 'external/unitedforum/slider/';   

//picture width and height !same as in the CSS FILE!
$maxwidth = 650;                                  
$maxheight = 250;    

//do you want images without previewimage to be shown? slider is using the fallback then
$show_articles_without_image = false;           

//picture shown if your articles has no previewpicture
$fallback_img = $slider_img_filepath . 'uf_fallback_slider.png';  

//hardcoded maximum is 20 - if you want more just ask
$number_of_articles_shown = 5;                                
            
//lengh in characters of the article descriptions
$description_length = 95;
If you change $maxwidth and $maxheight you need to edit the nivo-slider_uf_theme.css file, here:
Code:
.theme-uf #slider {
    margin:0px auto 0 auto;
    width:650px; /* Make sure your images are the same size */
    height:250px; /* Make sure your images are the same size */
}
Width and height have to be the same value in your php-widget and in the css file.

In additon to these settings i also included a "value/relevance function". Meaning the slider doesn't show your latest 5 articles, but instead weights them based on age and comments.

As older an article is the less likely it will show up in the slider.
More comments make it more likely.

This behaviour can be easily changed. I didn't include an if condition cause every board has different needs and i don't know whats best for you.
In addition conditions like "articles just from this section - or these sections, or this category, with a minimum of 10 posts" can be included via one single if condition. Again, i don't know what your board needs or what your category names are.

You can also modify the preview length (more words, less words), the preview style (color fontsize, fontweight .... Again different forums different needs. It's highly customizable.

Support:

Support and requests for the slider itself should be asked here http://nivo.dev7studios.com/
Same goes for different slider themes - a lot is possible, even thumbnails - again this is part of the nivo slider and not the vb4 implementation.

If you have any questions regarding the settings - or want different settings (which have to do with vb4) - ask, and i'll try to come up with some code // show you where you have to put what.

Slider not working. No idea why?

You will find a FAQ in the first comment, which will be kept up to date:
FAQ

The widget here is completely free. No charge, no branding.
But, we do not mind donations either. If you want to give us something. Since we are advertising free and fan based we are happy about every small donation.

( On Forumhome bottom right paypal button: http://www.united-forum.de/forum.php )

That's all
Hope it works for you.

Regards Mooff

Mooff · #42 07-23-2011, 08:24 PM

two possibilities come to mind:
a) you do not have the jquery1.4.4.js file in the vbulletin folder
This would mean search

Code:

 <script type="text/javascript" src="clientscript/jquery/jquery-1.4.4.min.js"></script>

and replace with

Code:

 <script type="text/javascript" src="' .$slider_img_filepath. 'jquery-1.6.1.min.js"></script>

b) you already have a jquery version running on the page where the slider is included.
Just delete that line. Two jquery files on one page are unnecessary and unfortunately break the jquery execution.

Code:

 <script type="text/javascript" src="clientscript/jquery/jquery-1.4.4.min.js"></script>

If the jquery version you are using on your website is above 1.4 - you are fine and everything should be working now.
If it isn't - update your version.

Alfa1 · #43 07-23-2011, 09:31 PM

Quote:

Originally Posted by Mooff

0.9.2 (23.07.2011)

fixed a bug which caused the slider to not find attachements
removed the fopen() function. Now checking via a GD function whether given ressource is an image

There you go - code in first post updated.
That should do the trick. =)

Im afraid not. :s

SECTalk.com · #44 07-24-2011, 01:02 AM

Thanks, I had multiple (about five or 6) instances of jQuery running.

Aramist · #45 07-24-2011, 05:09 PM

Same to me =/

Everything work fine....except images, that dont appear.

=/

Mooff · #46 07-24-2011, 05:21 PM

Sorry Alfa1, i'll check that attachment issue more thouroughly sometime next week when our new cms is finally live.

@ Aramist
- please check out post #41 maybe it's a javascript thing
- or are your article images attachments
- or do the images show up in the folder you specified
- or does the fallback image work if you set this switch on yes

I'll rewrite the first post sometime around tuesday, clean it up a bit and provide a (hopefully) usefull faq in the first comment.

Aramist · #47 07-24-2011, 05:45 PM

- please check out post #41 maybe it's a javascript thing
I've already done that

- or are your article images attachments
no

- or do the images show up in the folder you specified
the folder i've specified keeps empty..

- or does the fallback image work if you set this switch on yes
It works fine

I'm sure the problem is in the image creation, cause your condition to use a sample image in case the image creation fail is working.

But i haven't figured out why... =/

=/

Ty

Mooff · #48 07-24-2011, 05:57 PM

Do you have php GD installed?
Is the folder you've specified writeable?

If both answers are yes please comment out //ob_start(); and //ob_end_clean()
and post the debug message, if there is one.

Aramist · #49 07-24-2011, 06:03 PM

Ohhh...how stupid I am..

I had removed
//picture width and height !same as in the CSS FILE!
$maxwidth = 650;
$maxheight = 250;

that was the problem...now works fine

Good jog !!

Other question:

How can i point the DB query to get article from one exclusive cms category?

Ty a lot man

Mooff · #50 07-24-2011, 06:17 PM

Great to hear that. =)

category or section?
i'll write down the category code (untested)

Code:

$query = sprintf("
        SELECT
            article.pagetext,
            article.previewimage,
            node.url,
            node.publishdate,
            node.parentnode,
            parentnode.url AS parenturl,
            thread.replycount,
            info.title,
            node.nodeid
        FROM
            ".TABLE_PREFIX."cms_article AS article INNER JOIN
            ".TABLE_PREFIX."cms_node AS node 
                ON (node.contentid = article.contentid AND node.contenttypeid = '%d') INNER JOIN
            ".TABLE_PREFIX."cms_nodeinfo AS info 
                ON info.nodeid = node.nodeid INNER JOIN
            ".TABLE_PREFIX."cms_node AS parentnode 
                ON parentnode.nodeid = node.parentnode LEFT JOIN
            ".TABLE_PREFIX."thread AS thread ON thread.threadid = info.associatedthreadid LEFT JOIN
            ".TABLE_PREFIX."cms_nodecategory AS nodecategory ON nodecategory.nodeid = node.nodeid 
        WHERE
            nodecategory.categoryid = X AND
            node.setpublish = 1 AND
            node.publishdate > '%d' -34560000
        ORDER BY node.publishdate
        ASC LIMIT 20"
        ,$article_type,$time);

that X in
nodecategory.categoryid = X AND
is your categoryid - you have to look that one up. For example:
/content/category/31-esport.html
Category esports on our site has the ID 31.

in addition, delete that line:

Code:

        $categories = explode(',' , $article['GROUP_CONCAT( category.category )']);

Aramist · #51 07-24-2011, 06:28 PM

Oh TY !

I had to include category.categoryid in select option.

Now works like a charm !!

TY a lot Dude!

5 star rated for the mod and for the support!

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