org.wicketstuff.dojo11.dojodnd.DojoDraggableBehavior.java Source code

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Here is the source code for org.wicketstuff.dojo11.dojodnd.DojoDraggableBehavior.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 org.wicketstuff.dojo11.dojodnd;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.parser.XmlTag;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.string.Strings;
import org.apache.wicket.util.value.IValueMap;

/**
 * @author Stefan Fussenegger
 */
public class DojoDraggableBehavior extends AbstractBehavior {
    /**
     * same as {@link DojoDropContainer#DEFAULT_ACCEPT}
     */
    public static final String DEFAULT_DND_TYPE = DojoDropContainer.DEFAULT_ACCEPT;

    private static final String DOJO_DND_ITEM_CLASS = "dojoDndItem";
    private IModel dndTypeModel;

    /**
     * Construct.
     */
    public DojoDraggableBehavior() {
        this(new Model(DEFAULT_DND_TYPE));
    }

    /**
     * Construct.
     * @param dndTypeModel
     */
    public DojoDraggableBehavior(IModel dndTypeModel) {
        this.dndTypeModel = dndTypeModel;
    }

    /**
     * @see org.apache.wicket.behavior.IBehavior#onComponentTag(org.apache.wicket.Component,
     *      org.apache.wicket.markup.ComponentTag)
     */
    public final void onComponentTag(Component component, ComponentTag tag) {
        if (tag.getType() != XmlTag.CLOSE) {
            final IValueMap attributes = tag.getAttributes();
            attributes.put("dndType", dndTypeModel.getObject());
            String cls = (String) attributes.get("class");
            if (Strings.isEmpty(cls)) {
                cls = DOJO_DND_ITEM_CLASS;
            } else {
                cls = cls + " " + DOJO_DND_ITEM_CLASS;
            }
            attributes.put("class", cls);
        }
    }

    /**
     * @see org.apache.wicket.behavior.AbstractBehavior#bind(org.apache.wicket.Component)
     */
    @Override
    public void bind(Component component) {
        super.bind(component);
        component.setOutputMarkupId(true);
    }

    /**
     * @see org.apache.wicket.behavior.AbstractBehavior#detach(org.apache.wicket.Component)
     */
    @Override
    public void detach(Component component) {
        dndTypeModel.detach();
        super.detach(component);
    }

}