com.etest.valo.Trees.java Source code

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Here is the source code for com.etest.valo.Trees.java

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/*
 * Copyright 2000-2013 Vaadin Ltd.
 * 
 * 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 com.etest.valo;

import com.etest.main.MainUI;
import com.vaadin.data.Container;
import com.vaadin.event.dd.DragAndDropEvent;
import com.vaadin.event.dd.DropHandler;
import com.vaadin.event.dd.acceptcriteria.AcceptAll;
import com.vaadin.event.dd.acceptcriteria.AcceptCriterion;
import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Label;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Tree;
import com.vaadin.ui.Tree.TreeDragMode;
import com.vaadin.ui.VerticalLayout;

public class Trees extends VerticalLayout implements View {
    public Trees() {
        setMargin(true);

        Label h1 = new Label("Trees");
        h1.addStyleName("h1");
        addComponent(h1);

        HorizontalLayout row = new HorizontalLayout();
        row.addStyleName("wrapping");
        row.setSpacing(true);
        addComponent(row);

        Tree tree = new Tree();
        tree.setSelectable(true);
        tree.setMultiSelect(true);
        Container generateContainer = MainUI.generateContainer(10, true);
        tree.setContainerDataSource(generateContainer);
        tree.setDragMode(TreeDragMode.NODE);
        row.addComponent(tree);
        tree.setItemCaptionPropertyId(MainUI.CAPTION_PROPERTY);
        tree.setItemIconPropertyId(MainUI.ICON_PROPERTY);
        tree.expandItem(generateContainer.getItemIds().iterator().next());

        tree.setDropHandler(new DropHandler() {
            @Override
            public AcceptCriterion getAcceptCriterion() {
                return AcceptAll.get();
            }

            @Override
            public void drop(DragAndDropEvent event) {
                Notification.show(event.getTransferable().toString());
            }
        });

        // Add actions (context menu)
        tree.addActionHandler(MainUI.getActionHandler());
    }

    @Override
    public void enter(ViewChangeEvent event) {
        // TODO Auto-generated method stub

    }

}