org.hippoecm.addon.workflow.MenuList.java Source code

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Here is the source code for org.hippoecm.addon.workflow.MenuList.java

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/*
 *  Copyright 2009-2014 Hippo B.V. (http://www.onehippo.com)
 * 
 *  Licensed 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.hippoecm.addon.workflow;

import java.util.List;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AttributeAppender;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.markup.repeater.data.DataView;
import org.apache.wicket.markup.repeater.data.ListDataProvider;
import org.apache.wicket.model.Model;
import org.hippoecm.frontend.plugin.config.IPluginConfig;

class MenuList extends Panel implements MenuComponent {

    private static final long serialVersionUID = 1L;

    private static final int TWO_COL_THRESHOLD = 20;
    private static final int THREE_COL_THRESHOLD = 40;

    private final List<Component> list;
    private final MenuHierarchy menu;
    private final int twoColThreshold;
    private final int threeColThreshold;

    private final AttributeAppender threeColAttribute;
    private final AttributeAppender twoColAttribute;

    MenuList(String id, MenuHierarchy menu, IPluginConfig config) {
        super(id);
        this.menu = menu;
        this.list = menu.list(this);
        if (config != null) {
            this.twoColThreshold = config.getInt("menu.twoColThreshold", TWO_COL_THRESHOLD);
            this.threeColThreshold = config.getInt("menu.threeColThreshold", THREE_COL_THRESHOLD);
        } else {
            this.twoColThreshold = TWO_COL_THRESHOLD;
            this.threeColThreshold = THREE_COL_THRESHOLD;
        }
        threeColAttribute = new AttributeAppender("class", Model.of("hippo-toolbar-three-col"));
        twoColAttribute = new AttributeAppender("class", Model.of("hippo-toolbar-two-col"));

        add(new DataView<Component>("list", new ListDataProvider<Component>(list)) {

            public void populateItem(final Item<Component> item) {
                Component menuItem = item.getModelObject();
                item.add(menuItem);
            }
        });
    }

    public void update() {
        this.list.clear();
        this.list.addAll(menu.list(this));
    }

    @Override
    protected void onBeforeRender() {
        super.onBeforeRender();

        if (list.size() > threeColThreshold) {
            if (!this.getBehaviors().contains(threeColAttribute)) {
                add(threeColAttribute);
            }
        } else if (list.size() > twoColThreshold) {
            if (!this.getBehaviors().contains(twoColAttribute)) {
                add(twoColAttribute);
            }
        }
    }
}