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POHow to "print" a theme during AJAX request (Drupal)
 

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  1. POHow to "print" a theme during AJAX request (Drupal)
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    <p>When users click on a button (with <code>id</code> graph), I'd like to fill the default Drupal content <code>div</code> (<code>&lt;div class="content"&gt;</code>) with a graphael instance. </p> <p>The JavaScript:</p> <pre><code>jQuery(document).ready(function($) { $('#toggle #graph').click(function() { $.ajax({ url: "http://www.mysite.com/?q=publications/callback", type: 'POST', data: { 'format' : 'graph' }, success: function(response) { $('div#content div.content').html(response); } }); }); }); </code></pre> <p>The PHP:</p> <pre><code>$items['publications/callback'] = array( 'type' =&gt; MENU_CALLBACK, 'title' =&gt; 'All Publications Callback', 'page callback' =&gt; '_process_publications', 'page arguments' =&gt; array(t('journal')), 'access callback' =&gt; TRUE, ); </code></pre> <p>which leads to the page callback: (I'm concerned with the <code>if</code> code block)</p> <pre><code>function _process_publications($venue) { if( isset($_POST['format']) &amp;&amp; $_POST['format'] == "graph" ){ _make_bar_chart($venue); } elseif( isset($_POST['format']) &amp;&amp; $_POST['format'] == "list" ) { _make_list($venue); } else{ return("&lt;p&gt;blah&lt;/p&gt;"); } } </code></pre> <p>and finally the function called within the callback function:</p> <pre><code>function _make_bar_chart($venue) { // get active database connection $mysql = Database::getConnection(); // if connection is successful, proceed if($mysql){ // do stuff $graphael = array( 'method' =&gt; 'bar', 'values' =&gt; $ycoordinates, 'params' =&gt; array( 'colors' =&gt; $colors, 'font' =&gt; '10px Arial, sans-serif', 'opts' =&gt; array( 'gutter' =&gt; '20%', 'type' =&gt; 'square', ), 'label' =&gt; array( 'values' =&gt; $xcoordinates, 'isBottom' =&gt; true, ), ), 'extend' =&gt; array( 'label' =&gt; array( 'values' =&gt; $ycoordinates, 'params' =&gt; array('attrText' =&gt; array( 'fill' =&gt; '#aaa', 'font' =&gt; '10px Arial, sans-serif', )), ), ), ); return theme('graphael', $graphael); } // else, connection was unsuccessful else{ print("&lt;p&gt;bad connection&lt;/p&gt;"); } } </code></pre> <p><strong>THE PROBLEM:</strong> returning a theme doesn't really send anything back to the AJAX request (unlike <code>print</code> statements). I tried to print the theme, but that produces a white screen of death. How would I generate the graph without printing something?</p>
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    1. COhave you tried drupal_json_output()?
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    2. CONo, I haven't, but I'll try that now
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    3. COthis only outputs the parameters of `$graphael` in JSON format; it does not actually produce the graph
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