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https://issues.apache.org/jira/browse/WICKET-2253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Vaynberg updated WICKET-2253:
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Fix Version/s: (was: 1.4-RC2)
(was: 1.3.6)
> JavaScript null reference in IE7 for autocomplete text fields added by AJAX
> ---------------------------------------------------------------------------
>
> Key: WICKET-2253
> URL: https://issues.apache.org/jira/browse/WICKET-2253
> Project: Wicket
> Issue Type: Bug
> Reporter: Per Cederberg
>
> IE7 displays an null reference error when adding a Wicket
> AutoCompleteTextField to a form as part of an AJAX response. This is caused
> by the INPUT DOM element not being immediately accessible, since it is added
> as HTML text (via innerHTML) instead of via the normal DOM API:s. So, the
> JavaScript autocomplete initialization code must be delayed until the HTML
> code has been parsed and properly inserted into the DOM tree.
> We've solved this by patching our local copy of Wicket 1.3.x in the
> wicket-autocomplete.js file:
> @@ -39,6 +37,7 @@
> var KEY_CTRL=17;
> var KEY_ALT=18;
>
> + var initCounter=10; // counter to avoid eternal init calls
> var selected=-1; // index of the currently selected item
> var elementCount=0; // number of items on the auto complete list
> var visible=0; // is the list visible
> @@ -63,6 +62,24 @@
> var throttleDelay = 300;
>
> function initialize(){
> + // Ugly hack to avoid null reference in IE7...
> + if (initCounter <= 0) {
> + return;
> + }
> + initCounter--;
> + var obj=wicketGet(elementId);
> + if (obj == null) {
> + setTimeout(initialize, 100);
> + return;
> + }
> + initCounter=0;
> +
> + // Avoid initializing same element twice
> + if (obj.wicketInit) {
> + return;
> + }
> + obj.wicketInit=true;
> This is not an optimal solution, but with the current Wicket solution of
> injecting HTML code as text into the DOM tree one is forced to poll for the
> inserted DOM node...
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