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The pathway widget can be used to include a pathway viewer in your website. You can include a pathway widget by adding the following code snippet to your site:

<pre><nowiki><iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=PATHWAYID[&rev=REVISION]" width="500" height="500" style="overflow:hidden;"></iframe></nowiki></pre>

In the iframe url, specify the ''id'' parameter by replacing PATHWAYID with the identifier of the pathway you want to add (e.g. WP4, you can find this identifier in the url of the pathway page) and optionally specify the ''rev'' parameter by replacing REVISION by a specific revision number of the pathway (you can find these in the ''history'' section on the pathway page). If you leave out the ''rev'' parameter, the widget will always show the most recent version of the pathway.

== Examples ==
To add a widget for the newest version of the [[Pathway:WP87|mouse nucleotide metabolism pathway]], use the following code snippet:

<pre><nowiki><iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP87" width="600px" height="300px" style="overflow:hidden;"></iframe></nowiki></pre>

<html>
<iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP87" width="600px" height="300px" style="overflow:hidden;"></iframe>
</html>

=== Specific version of the pathway ===
To add a widget for a specific version of the pathway, lookup the revision in the ''history'' section on the pathway page and add it as the ''rev'' parameter to the ''iframe'' url. For example, to point to revision 71749 of the [[Pathway:WP87|mouse nucleotide metabolism pathway]], use the following code snippet:

<pre><nowiki><iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP87&rev=71749" width="600px" height="300px" style="overflow:hidden;"></iframe></nowiki></pre>

''Note that older revisions that use GPML schema prior to 2013a may not be rendered as interactive SVG. A static PNG will be shown in these cases.''

<html>
<iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP87&rev=71749" width="600px" height="300px" style="overflow:hidden;"></iframe>
</html>

=== Change the size of the widget ===
You can change the size of the widget with the ''width'' and ''height'' parameters of the ''iframe'' tag:

<pre><nowiki><iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP12" width="800px" height="300px" style="overflow:hidden;"></iframe></nowiki></pre>

<html>
<iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP12" width="800px" height="300px" style="overflow:hidden;"></iframe>
</html>

=== Highlight elements on the pathway ===
You can highlight specific elements on the pathway. You can match by text label (get parameter 'label') or external reference (get parameter 'xref'). You can also specify the highlight color(s) using the 'colors' parameter. You can provide colors in names (e.g. 'red') or hexadecimals (e.g. '%23FF0000', note that the # sign needs to be encoded in the url). If you provide a single color, all highlights will get that color (e.g. colors='red'), but you can also provide multiple colors as a comma separated list (e.g. colors='red,green,blue'). 

==== Label, Xref and Color ====
<pre><nowiki><iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP4&label=AKAP&xref=HMDB00464,HMDB&colors=green" width="600px" height="300px" style="overflow:hidden;"></iframe></nowiki></pre>

<html>
<iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP4&label=AKAP&xref=HMDB00464,HMDB&colors=green" width="600px" height="300px" style="overflow:hidden;"></iframe>
</html>

==== Multiple Labels and Colors ====
<pre><nowiki><iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP4&label[]=APC&label[]=TP53&label[]=ATP&colors=green,red,blue" width="600px" height="300px" style="overflow:hidden;"></iframe></nowiki></pre>

<html>
<iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP4&label[]=APC&label[]=TP53&label[]=ATP&colors=green,red,bluee" width="600px" height="300px" style="overflow:hidden;"></iframe>
</html>

==== Multiple Xrefs and Single Color ====
<pre><nowiki><iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP4&xref[]=ENSG00000134982,Ensembl&xref[]=HMDB00193,HMDB&colors=purple" width="600px" height="300px" style="overflow:hidden;"></iframe></nowiki></pre>

<html>
<iframe src ="http://www.wikipathways.org/wpi/PathwayWidget.php?id=WP4&xref[]=ENSG00000134982,Ensembl&xref[]=HMDB00193,HMDB&colors=purple" width="600px" height="300px" style="overflow:hidden;"></iframe>
</html>