com.gwt2go.dev.client.ui.widget.celltree.CellTreeRooterModel.java Source code

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Here is the source code for com.gwt2go.dev.client.ui.widget.celltree.CellTreeRooterModel.java

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/*
 * Copyright 2012
 *
 * 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.gwt2go.dev.client.ui.widget.celltree;

import java.util.ArrayList;
import java.util.List;

import com.google.gwt.cell.client.AbstractCell;
import com.google.gwt.cell.client.Cell;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.view.client.ListDataProvider;
import com.google.gwt.view.client.SingleSelectionModel;
import com.google.gwt.view.client.TreeViewModel;

/**
 * TreeVievModel defines how to render the cell tree navigation.
 * 
 * @author L.Pelov
 */
public class CellTreeRooterModel implements TreeViewModel {

    private final List<CellTreeRooterDaoComposer> composers;
    private final SingleSelectionModel<GotoPlacesModel> selectionModel;

    public CellTreeRooterModel(SingleSelectionModel<GotoPlacesModel> selectionModel) {

        composers = new ArrayList<CellTreeRooterDaoComposer>();
        this.selectionModel = selectionModel;

        { // First section

            CellTreeRooterDaoComposer level1 = new CellTreeRooterDaoComposer("Widgets");
            composers.add(level1);

            CellTreeRooterDaoModel sublevel_1_1 = level1.addNode(new CellTreeRooterDaoModel("Tables"));

            sublevel_1_1.addNode("Sorting table - example 1", "table");
            sublevel_1_1.addNode("Sorting table - example 2", "table2");
            sublevel_1_1.addNode("Sorting table - GWT2.3 way", "sortingtable23");
            sublevel_1_1.addNode("DataGrid - GWT2.4 way", "datagrid1");

            CellTreeRooterDaoModel sublevel_1_2 = level1.addNode(new CellTreeRooterDaoModel("Editor"));

            sublevel_1_2.addNode("Editor - WYSIWYG", "editor");

            CellTreeRooterDaoModel sublevel_1_3 = level1.addNode(new CellTreeRooterDaoModel("Trees"));

            sublevel_1_3.addNode("CellTree Exampl1", "celltree1");

            CellTreeRooterDaoModel sublevel_1_4 = level1.addNode(new CellTreeRooterDaoModel("Dnd"));

            sublevel_1_4.addNode("Drag and Drop 1", "dnd");
            sublevel_1_4.addNode("Drag and Drop 2", "dnd2");
        }

    }

    @Override
    public <T> NodeInfo<?> getNodeInfo(T value) {
        if (value == null) {
            // Create a data provider that contains the list of composers
            ListDataProvider<CellTreeRooterDaoComposer> dataProvider = new ListDataProvider<CellTreeRooterDaoComposer>(
                    composers);

            // Create a cell to display
            Cell<CellTreeRooterDaoComposer> cell = new AbstractCell<CellTreeRooterDaoComposer>() {
                @Override
                public void render(Context context, CellTreeRooterDaoComposer value, SafeHtmlBuilder sb) {
                    if (value != null) {
                        sb.appendEscaped(value.getName());
                    }
                }
            };

            // Return a node info that pairs the data provider and the cell
            return new DefaultNodeInfo<CellTreeRooterDaoComposer>(dataProvider, cell);

        } else if (value instanceof CellTreeRooterDaoComposer) {

            // get the first sub level
            ListDataProvider<CellTreeRooterDaoModel> dataProvider = new ListDataProvider<CellTreeRooterDaoModel>(
                    ((CellTreeRooterDaoComposer) value).getSubNodes());

            Cell<CellTreeRooterDaoModel> cell = new AbstractCell<CellTreeRooterDaoModel>() {
                @Override
                public void render(Context context, CellTreeRooterDaoModel value, SafeHtmlBuilder sb) {
                    if (value != null) {
                        sb.appendEscaped(value.getName());
                    }
                }
            };

            return new DefaultNodeInfo<CellTreeRooterDaoModel>(dataProvider, cell);

        } else if (value instanceof CellTreeRooterDaoModel) {

            // get the third sub level
            ListDataProvider<GotoPlacesModel> dataProvider = new ListDataProvider<GotoPlacesModel>(
                    ((CellTreeRooterDaoModel) value).getNodes());

            // Use the shared selection model
            return new DefaultNodeInfo<GotoPlacesModel>(dataProvider, new CellTreeRooterCell(), selectionModel,
                    null);

        }

        return null;

    }

    @Override
    public boolean isLeaf(Object value) {
        // you have to put this here otherwise you will get icon on the front of the latest
        // three element and looks like you have also under-levels, which is not nice
        if (value instanceof GotoPlacesModel) {
            return true;
        }
        return false;

    }

}