XopusCanvas.setViewParam

This method can be used to set the value of parameters in the XSL of the canvas.

This method is available on the XopusCanvas objects, and is most easily accessed through:

var canvas = Editor.Canvas.getActiveCanvas();
canvas.setViewParam("name", value);

Parameters need to be declared in the stylesheet that is used by the canvas:

<xsl:param name="name" select="0"/>

It is also possible, since Xopus 3.2.9, to use nodes as the values for parameters, and draw these params and the nodes contained in them in other parts of the document. Xopus versions before 3.2.9 did not handle the node correctly if the node was set using this method.

<xsl:param name="selectedNode" select="/doc/chapter[1]/section[1]"/>
…
<xsl:template name="toc">
  <ol>
    <xsl:for-each select="/doc/chapter/section">
      <li>
         <a href="#" onclick="Editor.Canvas.getActiveCanvas().setViewParam('selectedNode', node)">
           <xsl:value-of select="title"/>
         </a>
      </li> 
    </xsl:for-each>
  </ol>
</xsl:template>
…
<xsl:template name="currentlySelectedNode">
  <div>
    <xsl:apply-templates select="$selectedNode"/>
  </div>
</xsl:template>

When working with large XML documents, using parameters to draw only parts of the document can be a good way to limit the amount of XHTML drawn in the editor, which is good for performance.