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Wicket-Kendo UI
There is a newer version: 10.3.0
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.wicketstuff.kendo.ui;

import java.util.Collection;
import java.util.List;

import org.apache.wicket.Application;
import org.apache.wicket.Component;
import org.apache.wicket.core.request.handler.IPartialPageRequestHandler;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.util.lang.Generics;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.wicketstuff.jquery.core.JQueryBehavior;
import org.wicketstuff.jquery.core.Options;
import org.wicketstuff.jquery.core.IJQueryWidget.JQueryWidget;
import org.wicketstuff.kendo.ui.KendoDestroyListener.IDestroyable;
import org.wicketstuff.kendo.ui.settings.KendoUILibrarySettings;

/**
 * Provides the base class for Kendo UI behavior implementations
 *
 * @author Sebastien Briquet - sebfz1
 */
public class KendoUIBehavior extends JQueryBehavior implements IDestroyable
{
	private static final long serialVersionUID = 1L;
	private static final Logger LOG = LoggerFactory.getLogger(KendoUIBehavior.class);

	/** Data Sources */
	private List datasources = null;

	/**
	 * Constructor
	 *
	 * @param selector the html selector (ie: "#myId")
	 * @param method the kendo-ui method
	 */
	public KendoUIBehavior(String selector, String method)
	{
		this(selector, method, new Options());
	}

	/**
	 * Constructor
	 *
	 * @param selector the html selector (ie: "#myId")
	 * @param method the kendo-ui method
	 * @param options the {@link Options}
	 */
	public KendoUIBehavior(String selector, String method, Options options)
	{
		super(selector, method, options);

		this.initReferences();
	}

	// Methods //

	/**
	 * Initializes CSS & JavaScript resource references
	 */
	private void initReferences()
	{
		KendoUILibrarySettings settings = KendoUILibrarySettings.get();

		// kendo.common.min.css //
		if (settings.getCommonStyleSheetReference() != null)
		{
			this.add(settings.getCommonStyleSheetReference());
		}

		// kendo..min.css //
		if (settings.getThemeStyleSheetReference() != null)
		{
			this.add(settings.getThemeStyleSheetReference());
		}

		// kendo..mobile.min.css //
		if (settings.getMobileStyleSheetReference() != null)
		{
			this.add(settings.getMobileStyleSheetReference());
		}

		// kendo.ui.core.js //
		if (settings.getJavaScriptReference() != null)
		{
			this.add(settings.getJavaScriptReference());
		}
	}

	/**
	 * Adds a data-source to be rendered at {@link #renderHead(Component, IHeaderResponse)} time.
	 *
	 * @param datasource the {@link IKendoDataSource}
	 * @return {@code true} (as specified by {@link Collection#add})
	 */
	public boolean add(IKendoDataSource datasource)
	{
		if (this.datasources == null)
		{
			this.datasources = Generics.newArrayList();
		}

		return this.datasources.add(datasource);
	}

	@Override
	public void renderHead(Component component, IHeaderResponse response)
	{
		// Data Sources //
		if (this.datasources != null)
		{
			for (IKendoDataSource datasource : this.datasources)
			{
				this.renderOnDomReadyScript(datasource.toScript(), response); // #311, #333
			}
		}

		super.renderHead(component, response);
	}

	/**
	 * Gets the Kendo UI widget
	 *
	 * @return the jQuery object
	 */
	public String widget()
	{
		return KendoUIBehavior.widget(this.selector, this.method);
	}

	/**
	 * Gets the Kendo UI widget
	 *
	 * @param method the Kendo UI method
	 * @return the jQuery object
	 */
	protected String widget(String method)
	{
		return KendoUIBehavior.widget(this.selector, method);
	}

	/**
	 * Gets the Kendo UI widget
	 *
	 * @param selector the widget selector
	 * @param method the Kendo UI method
	 * @return the jQuery object
	 */
	public static String widget(String selector, String method)
	{
		return String.format("jQuery('%s').data('%s')", selector, method);
	}

	/**
	 * Gets the Kendo UI widget
	 *
	 * @param component the {@link Component}
	 * @param method the Kendo UI method
	 * @return the jQuery object
	 */
	public static String widget(Component component, String method)
	{
		return KendoUIBehavior.widget(JQueryWidget.getSelector(component), method);
	}

	@Override
	public void destroy(IPartialPageRequestHandler handler)
	{
		handler.prependJavaScript(String.format("var $w = %s; if($w) { $w.destroy(); }", this.widget()));

		this.onDestroy(handler);
	}

	// Events //

	@Override
	public void onConfigure(Component component)
	{
		super.onConfigure(component);

		if (!Application.get().getMarkupSettings().getStripWicketTags())
		{
			LOG.warn("Application > MarkupSettings > StripWicketTags: setting is currently set to false. It is highly recommended to set it to true to prevent widget misbehaviors.");
		}
	}

	/**
	 * Called when the widget is about to be destroyed
	 * 
	 * @param handler the {@link IPartialPageRequestHandler}
	 * @see #destroy(IPartialPageRequestHandler)
	 */
	protected void onDestroy(IPartialPageRequestHandler handler)
	{
		// noop
	}
}