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<p>Knowners is a semantic visualization plugin, produced by FakePress and Art is Open Source. It is meant as a large-scale part of your wordpress interaface, where you can host a beautiful interactive graph that shows the semantic structure of your blog. Full HTML5 and Canvas support. Interaction.</p>
<p>Knowners is not a widget, but rather a wordpress extension that you can call in your theme templates.</p>
<p>This new version works directly on POSTS and the network visualization is built automatically using tags.</p>
<p>As with the other versions, follow these steps to install the plugin:</p>
<p> unzip the archive in your wordpress plugin folder (you should obtain a ?knowners? directoty containing a bunch of files)  go to your WordPress dashboard, to the section ?Plugins?  identify the ?knowners? plugin in the list and click ?Activate?  insert the PHP command knowners_render_posts() in your templates wherever you wish to display your POST-based visualization  insert the PHP command knowners_render_links() in your templates wherever you wish to display your LINKS-based visualization  you?re set!  </p>
<p>remember that the plugin is designed to occupy a large area: displaying it in a small div or other HTML container might not come out too nice.</p>
<p>The plugin automatically fills all the container it has been placed into.</p>
<p>The Knowners functions can be called anywhere in your theme and will take up all the space of the container in which they are called.</p>
<p>Please note that this plugin is designed to occupy lots of space: you will get awful results if you call it in smaller ones.</p>
<p>Please check out the plugin website for an example of its usage, so that you can get the feel of what you can achieve and please check back real soon for the updates, including the improved editing facilities and navigation tools.</p>


knowners

Knowners is a semantic visualization plugin, produced by FakePress and Art is Open Source.

Katsushi Kawamori

<h4>Integrates Canvas into WordPress.</h4>
<ul>
<li>Provide canvas shortcode.</li>
<li>Provides a filter hook when saving the canvas.</li>
<li>It supports both mouse and touch.</li>
<li>It supports both the management screen and the public screen. The appearance of buttons and select boxes on the public screen depends on the CSS of the theme.</li>
</ul>
<h4>How to use the canvas</h4>
<span class="embed-youtube" style="text-align:center; display: block;"><iframe class="youtube-player" width="640" height="360" src="https://www.youtube.com/embed/_9XWJJbY6mQ?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation"></iframe></span>
<h4>Sample of how to use the filter hook</h4>
<ul>
<li>Shortcode for canvas display</li>
</ul>
<pre><code>echo do_shortcode( '[freecanvas height=500]' );
</code></pre>
<ul>
<li>shortcode<br />
Attribute : Default : Description<br />
width : 700 : Canvas width<br />
height : 700 : Canvas height<br />
name : The date and time string when the canvas was loaded : Unique name for this canvas<br />
form_name: null : The name of the form value you want to get<br />
form_name2: null : The name of the form value you want to get<br />
form_name3: null : The name of the form value you want to get</li>
<li>Filter hook & Function</li>
</ul>
<pre><code>/**
 * Filter hook & function for outputs a PNG image file */
 *
 * @param string $image_data  image_data.
 * @param string $name  name.
 * @param string $form_value  form_value.
 * @param string $form_value2  form_value2.
 * @param string $form_value3  form_value3.
 */
function canvas_save( $image_data, $name, $form_value, $form_value2, $form_value3 ) {
    $wp_uploads = wp_upload_dir();
    $relation_path_true = strpos( $wp_uploads['baseurl'], '../' );
    if ( $relation_path_true > 0 ) {
        $upload_dir = wp_normalize_path( realpath( $wp_uploads['basedir'] ) );
    } else {
        $upload_dir = wp_normalize_path( $wp_uploads['basedir'] );
    }
    $filename = $upload_dir . '/' . $name . '.png';
    $image = imagecreatefromstring( $image_data );
    imagepng( $image, $filename );
}
add_filter( 'free_canvas_save', 'canvas_save', 10, 5 );
</code></pre>
<ul>
<li>Filter hook<br />
Variable : Description : From<br />
$image_data : PNG image data by Base64 : Value of Canvas<br />
$name : Unique name for this canvas : Value of Free Canvas<br />
$form_value : Form value obtained from form_name : Value of Form<br />
$form_value2 : Form value obtained from form_name2 : Value of Form<br />
$form_value3 : Form value obtained from form_name3 : Value of Form</li>
</ul>


Free Canvas

Provide a canvas. Various cooperation is possible by shortcode and filter.

knowners vs Free Canvas