I'm trying to define a bank of buttons based on the contents of an instance. I am doing this to de-clutter my view, by placing the actions in the model. I am using the dispatch element to fire off a dynamically named event (using the 'name' element).
It seems the context of the node is lost within a group or repeat? Here's a test case - the first case works - where I hardcode an explicit XPath to my data, the other test-cases show that the context is apparently not available when I try and reference this dynamically.
<?xml
version="1.0"
encoding="UTF-8"?>
<?xml-stylesheet
href="declarative4all/build/xsl/xsltforms.xsl"
type="text/xsl"?>
<?xsltforms-options
debug="no"?>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ht="http://www.w3.org/1999/xhtml"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xf="http://www.w3.org/2002/xforms"
xmlns:ev="http://www.w3.org/2001/xml-events"
lang="en">
<head>
<xf:model id="model">
<xf:instance>
<data xmlns="">
<button name="b1" icon="arrow_upward"/>
<button name="b2" icon="arrow_downward"/>
</data>
</xf:instance>
<xf:action ev:event="b1">
<xf:message>b1</xf:message>
</xf:action>
<xf:action ev:event="b2">
<xf:message>b2</xf:message>
</xf:action>
</xf:model>
</head>
<body>
<h1>TEST 1: hardcoded XPath in name element (works)</h1>
<xf:trigger id="t1">
<xf:label ref="button[1]/@name"/>
<xf:dispatch ev:event="DOMActivate">
<xf:targetid>model</xf:targetid>
<xf:name value="button[1]/@name"/>
</xf:dispatch>
</xf:trigger>
<h1>TEST 2: XPath implicit reference to context node (doesn't work)</h1>
<xf:group ref="button[1]">
<xf:trigger id="t2">
<xf:label ref="@name"/>
<xf:dispatch ev:event="DOMActivate">
<xf:targetid>model</xf:targetid>
<xf:name value="@name"/>
</xf:dispatch>
</xf:trigger>
</xf:group>
<h1>TEST 3: XPath explicit reference to context node (doesn't work)</h1>
<xf:group ref="button[1]">
<xf:trigger id="t3">
<xf:label ref="context()/@name"/>
<xf:dispatch ev:event="DOMActivate">
<xf:targetid>model</xf:targetid>
<xf:name value="context()/@name"/>
</xf:dispatch>
</xf:trigger>
</xf:group>
</body>
</html>
Workaround: since my buttons are going to be held within a 'repeat' - I can use the 'index()' function to set the correct node.
<xf:repeat id="r2" ref="button">
<xf:input ref="@name"/>
<xf:input ref="@icon"/>
<xf:trigger>
<xf:label ref="@name"/>
<xf:action ev:event="DOMActivate">
<xf:dispatch>
<xf:targetid>model</xf:targetid>
<xf:name value="instance()/button[index('r2')]/@name"/>
</xf:dispatch>
</xf:action>
</xf:trigger>
</xf:repeat>
XSLTForms uses the wrong context when evaluating xf:dispatch/xf:name/@value paths. See this GitHub issue.