wicketdnd.examples.TableTreeExample.java Source code

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Here is the source code for wicketdnd.examples.TableTreeExample.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.ArrayList;
import java.util.List;
import java.util.Set;

import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.extensions.markup.html.repeater.data.table.IColumn;
import org.apache.wicket.extensions.markup.html.repeater.data.table.PropertyColumn;
import org.apache.wicket.extensions.markup.html.repeater.tree.AbstractTree.State;
import org.apache.wicket.extensions.markup.html.repeater.tree.DefaultTableTree;
import org.apache.wicket.extensions.markup.html.repeater.tree.TableTree;
import org.apache.wicket.extensions.markup.html.repeater.tree.table.TreeColumn;
import org.apache.wicket.markup.repeater.ReuseIfModelsEqualStrategy;
import org.apache.wicket.model.Model;

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

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

        final FooTreeProvider provider = new FooTreeProvider();

        final TableTree<Foo, String> tabletree = new DefaultTableTree<Foo, String>("tabletree", columns(), provider,
                Integer.MAX_VALUE);
        // reuse items or drop following expansion will fail due to new
        // markup ids
        tabletree.setItemReuseStrategy(new ReuseIfModelsEqualStrategy());
        tabletree.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) {
                    Foo foo = transfer.getData();

                    provider.remove(foo);

                    foo.remove();

                    target.add(tabletree);
                }
            }
        }.drag("tr").initiate("span.tree-content").clone("span.tree-content"));
        tabletree.add(new DropTarget() {
            @Override
            public Set<Operation> getOperations() {
                return dropOperations();
            }

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

            @Override
            public void onDrag(AjaxRequestTarget target, Location location) {
                Foo foo = location.getModelObject();
                if (tabletree.getState(foo) == State.COLLAPSED) {
                    tabletree.expand(foo);
                }
            }

            @Override
            public void onDrop(AjaxRequestTarget target, Transfer transfer, Location location) throws Reject {
                Foo foo = location.getModelObject();
                if (foo.isAncestor(transfer.getData())) {
                    transfer.reject();
                }

                switch (location.getAnchor()) {
                case CENTER:
                    if (foo == transfer.getData()) {
                        transfer.reject();
                    }
                    provider.add(operate(transfer), foo);
                    tabletree.expand(foo);
                    break;
                case TOP:
                    provider.addBefore(operate(transfer), foo);
                    break;
                case BOTTOM:
                    provider.addAfter(operate(transfer), foo);
                    break;
                default:
                    transfer.reject();
                }

                target.add(tabletree);
            }
        }.dropCenter("tbody tr"));
        content.add(tabletree);
    }

    private List<IColumn<Foo, String>> columns() {
        List<IColumn<Foo, String>> columns = new ArrayList<IColumn<Foo, String>>();

        columns.add(new TreeColumn<Foo, String>(Model.of("Name")));
        columns.add(new PropertyColumn<Foo, String>(Model.of("Name"), "name"));

        return columns;
    }
}