DefaultTheme.java example

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/*
 * 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.apache.wicket.extensions.markup.html.form.palette.theme;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.extensions.markup.html.form.palette.Palette;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.head.CssHeaderItem;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.request.resource.CssResourceReference;
import org.apache.wicket.request.resource.ResourceReference;


/**
 * A default theme for a {@link Palette}.
 */
public class DefaultTheme extends Behavior
{

	private static final long serialVersionUID = 1L;

	/** reference to the palette's css resource */
	private static final ResourceReference CSS = new CssResourceReference(DefaultTheme.class,
		"palette.css");

	@Override
	public void onComponentTag(Component component, ComponentTag tag)
	{
		tag.append("class", "palette-theme-default", " ");
	}

	/**
	 * Renders header contributions
	 * 
	 * @param component
	 * @param response
	 */
	@Override
	public void renderHead(Component component, IHeaderResponse response)
	{
		response.render(CssHeaderItem.forReference(CSS));
	}
}