com.locke.library.web.behaviors.focus.FocusBehavior.java Source code

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Here is the source code for com.locke.library.web.behaviors.focus.FocusBehavior.java

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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 com.locke.library.web.behaviors.focus;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.markup.html.IHeaderResponse;

/**
 * Behavior which sets input focus to the component it is attached to. This is a
 * temporary behavior, which means it will be removed after the component is
 * rendered.
 * 
 * @author Jonathan Locke
 */
public class FocusBehavior extends AbstractBehavior {

    private static final long serialVersionUID = -6848204456741032984L;

    private Component component;

    /**
     * {@inheritDoc}
     */
    public void bind(Component component) {
        this.component = component;
        component.setOutputMarkupId(true);
    }

    /**
     * {@inheritDoc}
     */
    public void renderHead(IHeaderResponse iHeaderResponse) {
        super.renderHead(iHeaderResponse);
        iHeaderResponse
                .renderOnLoadJavascript("document.getElementById('" + component.getMarkupId() + "').focus()");
    }

    /**
     * {@inheritDoc}
     */
    public boolean isTemporary() {
        return true;
    }
}