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PODynamically add and remove components without AJAX?
 

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  1. PODynamically add and remove components without AJAX?
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    <p>I have a dynamic form that I'm writing in Wicket with a handful of forms that get duplicated with a "Click here to add more issues" type of button. I've written a very basic (I'm still new to Wicket) AJAXy listener that mostly works, but I can't figure out how to remove or even hide the items in my ListView.</p> <p>This makes me wonder, is there any way to just have some JS duplicate the form fields? Before I retooled the form with Wicket components I had the Jquery Dynamic Form Plugin duplicating the values. This worked great and was very easy to understand (an important plus). However I can't figure out how this would affect Wicket if I simply used the plugin instead of something like </p> <pre><code> //Issue box magic final MarkupContainer rowPanel = new WebMarkupContainer("issuesPanel"); rowPanel.setOutputMarkupId(true); form.add(rowPanel); ArrayList numIssues = new ArrayList(); numIssues.add(new Object()); numIssues.add(new Object()); numIssues.add(new Object()); final ListView lv = new ListView("issuesBox", numIssues) { @Override protected void populateItem(ListItem item) { int index = item.getIndex() + 1; item.add(new DropDownChoice("issues", combinedIssues)); item.add(new TextField&lt;String&gt;("note")); } }; lv.setReuseItems(true); rowPanel.add(lv); form.add(new AjaxSubmitLink("addIssue", form) { @Override public void onSubmit(AjaxRequestTarget target, Form form) { lv.getModelObject().add(new Object()); if (target != null) target.add(rowPanel); } }.setDefaultFormProcessing(false)); form.add(new AjaxSubmitLink("removeIssue", form) { @Override public void onSubmit(AjaxRequestTarget target, Form form) { //Wicket gets very angry when you remove components, so just hide it (recommended way) if (target != null) { Component lastObject = (Component)lv.get(lv.getList().size() - 1); lastObject.setVisible(false); log.debug("Components " + lv.get ); } } }.setDefaultFormProcessing(false)); </code></pre> <p>The JQuery plugin is much easier to use, but how can I tell Wicket that there are more fields than it thought there were? </p> <p>Note I'm also trying to avoid the AJAX call just to add a new issue which in the siltation I'm using the app in might become a problem.</p> <p>Any suggestions?</p>
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