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https://issues.apache.org/jira/browse/WICKET-3970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13086235#comment-13086235
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Martin Grigorov commented on WICKET-3970:
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I think you can use
org.apache.wicket.extensions.ajax.markup.html.modal.ModalWindow.getShowJavaScript()
for what you described.
> onAfterOpen java script for modal windows
> -----------------------------------------
>
> Key: WICKET-3970
> URL: https://issues.apache.org/jira/browse/WICKET-3970
> Project: Wicket
> Issue Type: Wish
> Reporter: Martin Cassidy
> Priority: Minor
>
> Its nice that you can add custom java script for the closing of a modal
> window but I've recently come across an issue where I need to get something
> to run after the modal window has opened. Appending the java script to the
> ajax request target didn't work because the script is running before the
> modal window and its contents are visible.
> I've been able to setup a quick fix for the moment by altering the modal.js
> to get it to run my callback method as a third statement in doShow() on line
> 691 which is working, it would be nice if there was something that could be
> set up via a method in the modal window class - getOpenJavascript() for
> example
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