ru.ksu.niimm.cll.mocassin.frontend.client.ConceptTreeNode.java Source code

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Here is the source code for ru.ksu.niimm.cll.mocassin.frontend.client.ConceptTreeNode.java

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/*******************************************************************************
 * Copyright (c) 2010-2012 Nikita Zhiltsov.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Nikita Zhiltsov - initial API and implementation
 *     Azat Khasanshin - implementation
 ******************************************************************************/
package ru.ksu.niimm.cll.mocassin.frontend.client;

import java.util.List;

import ru.ksu.niimm.cll.mocassin.frontend.common.client.AsyncCallbackWrapper;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.SuggestOracle.Suggestion;
import com.google.gwt.user.client.ui.TreeItem;
import com.google.gwt.user.client.ui.Widget;

public class ConceptTreeNode extends Composite {

    private static QueryTreeNodeUiBinder uiBinder = GWT.create(QueryTreeNodeUiBinder.class);

    interface QueryTreeNodeUiBinder extends UiBinder<HorizontalPanel, ConceptTreeNode> {
    }

    private final OntologyServiceAsync ontologyService = GWT.create(OntologyService.class);

    @UiField
    OntologyElementSuggestBoxPanel suggestBoxPanel;
    @UiField
    Button addButton;

    TreeItem treeItem;

    public ConceptTreeNode(TreeItem treeItem) {
        initWidget(uiBinder.createAndBindUi(this));
        this.treeItem = treeItem;
        this.addButton.setEnabled(false);
        this.suggestBoxPanel.addSuggestBoxStyleName("concept-SuggestBox");

        boolean isRoot = this.treeItem.getParentItem() == null;
        if (isRoot) {
            loadConceptNamesList();
        } else {
            Widget parentItemWidget = this.treeItem.getParentItem().getWidget();
            if (parentItemWidget instanceof PropertyTreeNode) {
                PropertyTreeNode parentPropertyNode = (PropertyTreeNode) parentItemWidget;
                OntElement selectedOntElement = parentPropertyNode.suggestBoxPanel.getSelectedValue();
                loadRangeConceptList(selectedOntElement);
            }
        }

    }

    @UiHandler("addButton")
    void handleClick(ClickEvent event) {
        OntElement selectedConcept = suggestBoxPanel.getSelectedValue();
        TreeItem child = new TreeItem();
        treeItem.addItem(child);
        child.setWidget(new PropertyTreeNode(child, selectedConcept));
        child.getTree().setSelectedItem(child);
        child.getTree().ensureSelectedItemVisible();
    }

    @UiHandler("suggestBoxPanel")
    void handleSelect(SelectionEvent<Suggestion> event) {
        this.treeItem.removeItems();
        this.addButton.setEnabled(true);
    }

    private void loadConceptNamesList() {
        AsyncCallbackWrapper<List<OntConcept>> callback = new AsyncCallbackWrapper<List<OntConcept>>() {

            @Override
            public void handleSuccess(List<OntConcept> result) {
                suggestBoxPanel.setSuggestions(result);
            }
        };
        ontologyService.getConceptList(callback);
    }

    private void loadRangeConceptList(OntElement selectedOntologyElement) {
        AsyncCallbackWrapper<List<OntElement>> callback = new AsyncCallbackWrapper<List<OntElement>>() {

            @Override
            public void handleSuccess(List<OntElement> result) {
                suggestBoxPanel.setSuggestions(result);
            }
        };
        if (selectedOntologyElement instanceof OntRelation) {
            OntRelation selectedRelation = (OntRelation) selectedOntologyElement;
            ontologyService.getRelationRangeConceptList(selectedRelation, callback);
        }

    }
}