I added your code verbatim and it works as expected. The only reason I
can see that "domNode" or its "event" property would be null is if the
wrong id were used. Or, there could be a JavaScript error somewhere in
the page.
That said, I'm assuming you're using Woodstock 4.2 or later? If you're
using an earlier version, then you may be looking at the wrong TLD examples.
Dan
Ryan de Laplante wrote:
> Thanks. I am certain that I have the right id:
>
> <webuijsf:form binding="#{Page1.form1}" id="*form1*">
> <webuijsf:dropDown binding="#{Page1.dropDown1}" id="*dropDown1*"
> items="#{Page1.list1}" label="Proximity To Elevator" labelOnTop="true"
> onChange="dropDown1Changed(); return
> false;" style="left: 216px; top: 48px; position: absolute"
> valueChangeListenerExpression="#{Page1.dropDown1_processValueChange}"/>
>
> function init() {
> var domNode = document.getElementById('*form1:dropDown1*');
> if (domNode == null || domNode.event == null) {
> return setTimeout("init();", 10);
> }
> alert('subscribing to dropDown1 endTopic');
> domNode.subscribe(domNode.event.refresh.endTopic, processEvents,
> "update");
> }
>
> <webuijsf:body binding="#{Page1.body1}" id="body1" onLoad="*init();*"
> style="-rave-layout: grid">
>
> The alert in init() never happens. This is a new visual web project
> with very little code in it. You can get it to work?
>
>
> Thanks,
> Ryan
>
> Dan Labrecque wrote:
>> Actually, I meant to use a "return" statement like so:
>>
>> function init() {
>> var domNode = document.getElementById("form1:dropDown1");
>> if (domNode == null || typeof domNode.subscribe !=
>> "function") {
>> return setTimeout('init();', 10);
>> }
>> domNode.subscribe(domNode.event.refresh.endTopic,
>> processEvents, "update");
>> }
>>
>> If your alerts are not being executed, it may be that you have the
>> wrong id.
>>
>> Dan
>>
>> Ryan de Laplante wrote:
>>> The init function was causing hundreds of "dojo.event has no
>>> properties" errors. I think you intended for the subscribe to be in
>>> an else block, so I changed it to look like this:
>>>
>>> function init() {
>>> var domNode = document.getElementById('form1:dropDown1');
>>> if (domNode == null || domNode.event == null) {
>>> setTimeout("init();", 10);
>>> } else {
>>> alert('before subscribe');
>>> domNode.subscribe(domNode.event.refresh.endTopic,
>>> processEvents, "update");
>>> alert('after subscribe');
>>> }
>>> }
>>>
>>> I never see the alerts because it seems that domNode.event always ==
>>> null.
>>>
>>> Thanks,
>>> Ryan
>>>
>>>
>>> Dan Labrecque wrote:
>>>> When are you calling the document.getElementById function? I
>>>> suspect you're calling this too early and the widget has not been
>>>> created, yet. In Woodstock 4.3 (next milestone), I've added an
>>>> onLoad attribute to the head tag. This will ensure your function is
>>>> executed after all widgets have been initialized. In the mean time,
>>>> you can use the approach below.
>>>>
>>>> <head>
>>>> <script type="text/javascript">
>>>> var processEvents = {
>>>> update: function(props) {
>>>>
>>>> document.getElementById('form1:progressBar1').setProps({"visible":false});
>>>>
>>>> }
>>>> }
>>>> function init() {
>>>> var domNode = document.getElementById("form1:dropDown1");
>>>> if (domNode == null || domNode.event == null) {
>>>> setTimeout("init();", 10);
>>>> }
>>>> domNode.subscribe(domNode.event.refresh.endTopic,
>>>> processEvents, "update");
>>>> }
>>>> </script>
>>>> </head>
>>>> <body onload="init();">
>>>> ...
>>>>
>>>> Dan
>>>
>>>
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>>
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