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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

Naijasite · #**452** 06-26-2012, 11:25 PM

I have installed the slider on my forum and it's working fine. But the slider is unable to pull thumbnail images from the Article.http://www.naijafinder.com/content/

Note: All my Article images are not uploaded images but they are copied and past into the Article.

The slider default images it's showing on my forum but can't pull my Article images.
Please how do i make the slider to pull thumbnail images from my Articles.

charlesr · #**453** 06-27-2012, 09:05 AM

Your site is running 4.2
This slider does not work without modification on 4.2 (see recent posts)

forumistat · #**454** 06-29-2012, 01:21 PM

Can someone help me set up this slider i only get a blank white box with nothing on it...

manyaa · #**455** 07-25-2012, 07:29 PM

1. My nivo-slider files and fallback_slider.png are at this location: ..stories.com/forum/slider/
2. Similarly all my VB files for cms, blog, forum are in: ..stories.com/forum/
( meaning slider and all files are in a folder named forum.)

3. I created php widget by making following changes in your code:
$fallback_img = $slider_img_filepath . 'fallback_slider.png';
$slider_img_filepath = '/slider/';

4. But the linked images and linked articles are not showing up. They are being linked as follows:
..stories.com/content.php?r=50-destination
..stories.com/slider/fallback_slider.png

5. While the actual location of articles and images are:
..stories.com/forum/slider/fallback_slider.png
..stories.com/forum/content.php?r=50-destination

6. Question: Where and what change should I be making to correct this problem? Thank you so much for your help.

dormopoco · #**456** 08-11-2012, 03:21 PM

A little question: Hot to storage image in folder /images/ ad script in another folder?

image in clientscript/slider/images/
script in clientscript/slider/

tnx for support

And how to setup only fade effect?

Elenna · #**457** 08-11-2012, 08:40 PM

Personally I would recommend NOT storing the images in the clientscript folder. That's a rather sensitive folder that should remain secure, so I wouldn't have a folder in there (images) that is chmod 777.

Either way, I think the mod is hard-coded to assume that the script and image directory is the same, and you'd need to change a bunch of stuff. IMHO it's just easier to follow the instructions and leave both in the same folder.

dormopoco · #**458** 08-12-2012, 06:36 AM

Quote:

Originally Posted by Elenna

Personally I would recommend NOT storing the images in the clientscript folder. That's a rather sensitive folder that should remain secure, so I wouldn't have a folder in there (images) that is chmod 777.

TNX for support

I tried and tried but I can not only set the fade effect.

Elenna · #**459** 08-12-2012, 02:06 PM

Quote:

Originally Posted by dormopoco

TNX for support

I tried and tried but I can not only set the fade effect.

Do you mean that it isn't transitioning between images at all? Or it IS pulling your images successfully, but that you only want to have it do the "Fade" effect and not any of the other ones?

If you only want the fade effect, edit your widget code like this:

Find:

Code:

    <script type="text/javascript">
    $(window).load(function() {
        $("#slider").nivoSlider();
    });
    </script>

Replace with:

Code:

    <script type="text/javascript">
    $(window).load(function() {
        $("#slider").nivoSlider({
        effect: 'fade' // Specify sets like: 'fold,fade,sliceDown'
		});
    });
    </script>

The available "options" for the red text are:
sliceDo

wn
sliceDownLeft
sliceUp
sliceUpLeft
sliceUpDown
sliceUpDownLeft
fold
fade
random
slideInRight
slideInLeft
boxRandom
boxRain
boxRainReverse
boxRainGrow
boxRainGrowReverse

You can choose more than one by putting a comma between them (like effect: 'fade, sliceUp, boxRain').

Another quick tip, if you want to have it re-get your article images, you can either FTP into that images folder and delete any of the article___ ones, OR edit the widget and change the cache time to a low number (like 1 minute). Don't forget to change it back.

dormopoco · #**460** 08-12-2012, 06:33 PM

Quote:

Originally Posted by Elenna

Do you mean that it isn't transitioning between images at all? Or it IS pulling your images successfully, but that you only want to have it do the "Fade" effect and not any of the other ones?

If you only want the fade effect, edit your widget code like this:

Find:

Code:

    <script type="text/javascript">
    $(window).load(function() {
        $("#slider").nivoSlider();
    });
    </script>

Replace with:

Code:

    <script type="text/javascript">
    $(window).load(function() {
        $("#slider").nivoSlider({
        effect: 'fade' // Specify sets like: 'fold,fade,sliceDown'
		});
    });
    </script>

Not Working, :-( whit this code i see only one line. Solved now the correct code is:

HTML Code:

    <script type="text/javascript">
    $(window).load(function() {
        $("#slider").nivoSlider({
        effect: "fade"
		});
    });
    </script>

Elenna · #**461** 08-12-2012, 11:03 PM

Hmm, strange. The only difference is removing the "Specify sets...." comment? Wouldn't have thought that would matter.

Glad you got it working, though!

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