I'm new to Zimbra and (unfortunately) I have to develop Zimlets.
Documentation is...well lets not talk about that.
So there is the singleClicked Method (works fine) and the singleClicked Element (doesn't work at all).
Here is my description file code:
As you can see I took the mailaggregator example and put it in the _dev folder.
<zimlet name="dk_cabo_mailaggregator" version="1.0" description="Mail Aggregator">
<zimletPanelItem label="Mail Aggregator" icon="dk_cabo_mailaggregator-panelIcon">
<toolTipText>Click to set up mail aggregation from Gmail, Yahoo! Mail, AOL, Hotmail</toolTipText>
<canvas type="window" width="300" height="300"/>
<actionUrl method="get" target="http://maps.google.com" />