wicketdnd.examples.ListsExample.java Source code

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Here is the source code for wicketdnd.examples.ListsExample.java

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/*
 * Copyright 2009 Sven Meier
 *
 * 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 wicketdnd.examples;

import java.util.Set;

import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.IAjaxIndicatorAware;
import org.apache.wicket.ajax.form.OnChangeAjaxBehavior;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.list.ListItem;
import org.apache.wicket.markup.html.list.ListView;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.PropertyModel;

import wicketdnd.DragSource;
import wicketdnd.DropTarget;
import wicketdnd.Location;
import wicketdnd.Operation;
import wicketdnd.Transfer;

/**
 * @author Sven Meier
 */
public class ListsExample extends Example implements IAjaxIndicatorAware {
    public ListsExample(String id) {
        super(id);

        content.add(newList("vertical"));
        content.add(newList("horizontal"));

        setTypes(new String[] { "toolbar" });
    }

    private Component newList(String id) {
        final FooList foos = new FooList();

        final WebMarkupContainer list = new WebMarkupContainer(id);
        final ListView<Foo> items = new ListView<Foo>("items", foos) {
            @Override
            protected ListItem<Foo> newItem(int index, IModel<Foo> model) {
                ListItem<Foo> item = super.newItem(index, model);
                item.setOutputMarkupId(true);
                return item;
            }

            @Override
            protected void populateItem(ListItem<Foo> item) {
                item.add(new TextField<String>("name", new PropertyModel<String>(item.getModel(), "name"))
                        .add(new OnChangeAjaxBehavior() {
                            @Override
                            protected void onUpdate(AjaxRequestTarget target) {
                            }
                        }));
            }
        };
        list.add(items);
        list.add(new DragSource() {
            @Override
            public Set<Operation> getOperations() {
                return dragOperations();
            }

            @Override
            public String[] getTypes() {
                return types();
            }

            @Override
            public void onAfterDrop(AjaxRequestTarget target, Transfer transfer) {
                if (transfer.getOperation() == Operation.MOVE) {
                    foos.remove(transfer.getData());

                    target.add(list);
                }
            }
        }.drag("div.item").initiate("span.initiate"));
        DropTarget dropTarget = new DropTarget() {
            @Override
            public Set<Operation> getOperations() {
                return dropOperations();
            }

            @Override
            public String[] getTypes() {
                return types();
            }

            @Override
            public void onDrop(AjaxRequestTarget target, Transfer transfer, Location location) {
                if (location.getComponent() == list) {
                    foos.add(operate(transfer));
                } else {
                    Foo foo = location.getModelObject();
                    switch (location.getAnchor()) {
                    case TOP:
                    case LEFT:
                        foos.addBefore(operate(transfer), foo);
                        break;
                    case BOTTOM:
                    case RIGHT:
                        foos.addAfter(operate(transfer), foo);
                        break;
                    default:
                        transfer.reject();
                    }

                    target.add(list);
                }
            }
        };
        if ("vertical".equals(id)) {
            dropTarget.dropTopAndBottom("div.item");
        } else {
            dropTarget.dropLeftAndRight("div.item");
        }
        list.add(dropTarget);

        return list;
    }

    @Override
    public String getAjaxIndicatorMarkupId() {
        return "veil";
    }
}