United-Forum Nivo Slider Widget

[Dunglx]

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.

Livedemo on a Big Board (>2.000.000 posts)



facts about the nivo slider
Originally Posted by nivo slider homepage

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

Installation

• upload all files 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:

// 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 $description_length = 95;   //Debug Messages if($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: $maxheight <br />";     echo "show_articles_without_image: ";          var_dump($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)             {                              //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.                             $article['previewimage'] = $fallback_img;                             echo '<span style="color:red">Error occurred:</span> imagecreation failed. ' . $article['previewimage']. '<br />';                         }                         else                         {                             $img_width = $imageinfo[0];                             $img_height = $imageinfo[1];                                                          imagecopyresampled($sprite, $image, 0, 0, 0, 0, $maxwidth, $maxheight, $img_width, $img_height );                             imagedestroy($image);                              $img_filepath = $slider_img_filepath . 'slide_' . $i . '.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.                         $article['previewimage'] = $fallback_img;                         echo '<span style="color:red">Error occurred:</span> picture is not readable.' . $article['previewimage']. '<br /> ';                     }                                   }                 else                 {                     //resiziing did not work - we are using the fallback image.                     $article['previewimage'] = $fallback_img;                     echo '<span style="color:red">Warning:</span> article has no previewimage or sprite is no ressource. ' . $article['previewimage']. '<br />';                 }                           /*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' . $i ;                 $article_neu['picture'] = '<a href="/content.php?r=' . $article['nodeid'] . '-' . $article['url'] . '"><img src="'.$article['previewimage'].'" alt="" title="#htmlcaption'. $i . '" /></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:

// 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:

.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 )

[nghebao.vn]

đã chạy, đang xem để thay theme

cái này chèn vào rồi, nhưng load có vẻ rất nặng, các các pro thử ngó giúp trên trang của mình xem có đúng vậy không www.nghebao.vn
Một điểm chưa hay nữa là nó tự tạo các hình để show trong một folder riêng, như thế sẽ mất thêm một dung lượng host không đáng
thanks

[kuboombi]

nghebao.vn ơi làm sao làm 1 trang CMS giống hệt cấu trúc như bạn đc vậy chỉ mình với