As far as I can tell, there is no way to get the index of a selected
item in a list. Am I overlooking something?
No, there's no nice way to do it. You can set the value attribute of
your listitems to a useful number (say, the offset in the list). Or you
can blindly hack at list:
<canvas debug="true">
<class name="hacklist" extends="list">
<method name="getItemOffset" args="li">
<![CDATA[
var sv = li.immediateparent.subviews;
for ( var i = 0; i < sv.length; i++ ) {
if ( li == sv[i] ) return i;
}
return NaN;
]]>
</method>
</class>
<simplelayout axis="x"/>
<hacklist name="l">
<listitem selected="true">
<text text="zero"/>
</listitem>
<listitem>
<text text="one"/>
</listitem>
<listitem>
<text text="two"/>
</listitem>
</hacklist>
<button text="print offset">
<method name="print" event="onclick">
Debug.write( canvas.l.getItemOffset(
canvas.l.getSelection() ) );
</method>
</button>
</canvas>
Dan Stowell
Software Engineer
Laszlo Studios
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