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Sigh.
name="treeEventListener"
!=
IBinding binding = getBinding("treeEventsListener");
1) paramter names are different
2) method names are OK (so the binding didn't barf)
time for bed
On Saturday 04 Jan 2003 10:18 pm, Neil Clayton wrote:
> Using Tapestry 2.2
>
> I have a component (Misko's TreeComponent actually) that I am attempting to
> add a parameter to. Not to hard methinks. Well, perhaps I should think
> again! (no fault of Misko's might I add)
>
> The problem is that the listener I am adding is NEVER set.
> The tree component is used like this:
>
> <component id="sourceProperties" type="Tree:Tree">
> <binding name="tree" expression='propertiesModel'/>
> <binding name="treeEventListener"
> expression='components.propertiesEditor'/>
> </component>
>
> components.propertiesEditor implements the listener interface, the idea
> being that as I click and use the tree, the other thing recieves the events
> and "does stuff". The fault is that no listener instance is EVER set in
> the tree itself.
>
> I've used a very basic implementation for the tree property, as follows:
>
> <parameter
> name="treeEventListener"
> java-type="net.sf.tapestry.contrib.tree.ITreeEvents"
> direction="in"
> required="no">
> <description>
> <![CDATA[ open/click and close events can be sent to this
> listener ]]>
> </description>
> </parameter>
>
> With java code as follows:
>
> /**
> * Returns the treeEventsListener.
> * @return ITreeEvents
> */
> public ITreeEvents getTreeEventsListener() {
> if (log.isDebugEnabled()) {
> log.debug("Trying to return the tree events listener. The
>member var is
> : " + treeEventsListener);
> }
>
> if (treeEventsListener == null) {
> IBinding binding = getBinding("treeEventsListener");
>
> if (log.isDebugEnabled()) {
> log.debug("Member var is null, binding is " + binding);
> }
>
> if (binding != null) {
> if(log.isDebugEnabled()) {
> log.debug("The object in the binding is " +
>binding.getObject());
> }
>
> return (ITreeEvents) binding.getObject();
> }
> }
> return treeEventsListener;
> }
>
> /**
> * Sets the treeEventsListener.
> * @param treeEventsListener The treeEventsListener to set
> */
> public void setTreeEventsListener(ITreeEvents treeEventsListener) {
> if (log.isDebugEnabled()) {
> log.debug("Setting the tree events listener to " +
>treeEventsListener);
> }
> this.treeEventsListener = treeEventsListener;
> }
>
>
> The output when I perform an action on the tree is:
>
> [exec] 22:16:59,498 DEBUG [net.sf.tapestry.contrib.tree.TreeComponent]
> Trying to return the tree events listener. The member var is : null
> [exec] 22:16:59,499 DEBUG [net.sf.tapestry.contrib.tree.TreeComponent]
> Member var is null, binding is null
> [exec] 22:16:59,499 DEBUG [net.sf.tapestry.contrib.tree.TreeComponent]
> Not calling tree event listener because it is not set
>
> Looks like there's NO binding at all.
> WEEEIRD.
>
> What have I done wrong?
> I've been staring at this for quite a while now. Time for bed!
- --
Regards,
Neil Clayton
(PS: If you see strange text you don't understand underneath my email, don't
worry - it's just my PGP signature)
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