Wicket Kendo UI: drop-down (custom template)

Lazy DropDownList: custom template

Components / Samples

Description

DropDownList widget allows you to customize the item's display using a jQuery template, which will be enclosed in a <script type="text/x-kendo-template" /> (so you can use the "\n" character to properly format the template).

For a DropDownList, the properties used in the template text (ie: #: data.name #) should be prefixed by "data." and should be identified in the list returned by IJQueryTemplate#getTextProperties(), without "data.".

@Override
protected IJQueryTemplate newTemplate()
{
	return new IJQueryTemplate() {

		private static final long serialVersionUID = 1L;

		@Override
		public String getText()
		{
			return  "<i>#: data.name #</i>";
		}

		@Override
		public List getTextProperties()
		{
			// should be specified, unless already part of the IChoiceRenderer
			return Arrays.asList("name");
		}
	};
}

Since

wicket-kendo-ui-7.1.0

Licensing

Kendo UI "Core" is Apache License 2.0 licensed, starting from version 2014.1.416.
Prior to version 2014.1.416, Kendo UI "Web" was licensed under GPLv3.

A pro version - with a commercial license - is also available, it provides additional widgets (see http://docs.telerik.com/kendo-ui/intro/supporting/list-of-widgets)
To be able to use it, you need to change the ResourceReference with kendo.all.min.js

Sources

Java
HTML
CSS

package com.googlecode.wicket.jquery.ui.samples.kendoui.dropdown;

import java.util.Arrays;
import java.util.List;

import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.model.Model;

import com.googlecode.wicket.jquery.core.template.IJQueryTemplate;
import com.googlecode.wicket.jquery.ui.samples.data.bean.Genre;
import com.googlecode.wicket.jquery.ui.samples.data.dao.GenresDAO;
import com.googlecode.wicket.kendo.ui.form.button.AjaxButton;
import com.googlecode.wicket.kendo.ui.form.button.Button;
import com.googlecode.wicket.kendo.ui.form.dropdown.lazy.DropDownList;
import com.googlecode.wicket.kendo.ui.panel.KendoFeedbackPanel;

public class TemplateDropDownPage extends AbstractDropDownPage
{
	private static final long serialVersionUID = 1L;

	public TemplateDropDownPage()
	{
		Form<Void> form = new Form<Void>("form");
		this.add(form);

		// FeedbackPanel //
		final KendoFeedbackPanel feedback = new KendoFeedbackPanel("feedback");
		form.add(feedback);

		// DropDownList //
		final DropDownList<Genre> dropdown = new DropDownList<Genre>("select", new Model<Genre>(), GenresDAO.all()) {

			private static final long serialVersionUID = 1L;
			
			@Override
			protected void onInitialize()
			{
				super.onInitialize();
				
				this.setListWidth(200);
			}

			@Override
			protected IJQueryTemplate newTemplate()
			{
				return new IJQueryTemplate() {

					private static final long serialVersionUID = 1L;

					@Override
					public String getText()
					{
						return  "\n<table style='width: 100%'>" +
							"\n <tr>" +
							"\n  <td>" +
							"\n   <img src='#: data.coverUrl #' width='50px' />" +
							"\n  </td>" +
							"\n  <td>" +
							"\n   #: data.name #" +
							"\n  </td>" +
							"\n </tr>" +
							"\n</table>";
					}

					@Override
					public List<String> getTextProperties()
					{
						return Arrays.asList("name", "coverUrl");
					}
				};
			}
		};

		form.add(dropdown);

		// Buttons //
		form.add(new Button("submit") {

			private static final long serialVersionUID = 1L;

			@Override
			public void onSubmit()
			{
				TemplateDropDownPage.this.info(dropdown);
			}
		});

		form.add(new AjaxButton("button") {

			private static final long serialVersionUID = 1L;

			@Override
			protected void onSubmit(AjaxRequestTarget target)
			{
				TemplateDropDownPage.this.info(dropdown);
				target.add(feedback);
			}
		});
	}

	private void info(DropDownList<Genre> dropdown)
	{
		Genre choice =  dropdown.getModelObject();

		this.info(choice != null ? choice : "no choice");
	}
}

<!DOCTYPE html>
<html xmlns:wicket="http://wicket.apache.org">
<head>
<wicket:head>
	<title>Wicket Kendo UI: drop-down (custom template)</title>
</wicket:head>
</head>
<body>
<wicket:extend>
	<div id="demo-panel">
		<form wicket:id="form">
			<input wicket:id="select" />
			<button wicket:id="submit" type="submit">Submit</button>
			<button wicket:id="button">Ajax Button</button>
			<br/><br/>
			<div wicket:id="feedback" style="width: 360px;"></div>
		</form>
	</div>
</wicket:extend>
</body>
</html>