com.agnie.gwt.common.client.widget.SuggestionBox.java Source code

Introduction

Here is the source code for com.agnie.gwt.common.client.widget.SuggestionBox.java

Source

/*******************************************************************************
 * Copyright (c) 2014 Agnie Technologies.
 * 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:
 *     Agnie Technologies - initial API and implementation
 ******************************************************************************/
package com.agnie.gwt.common.client.widget;

import java.util.List;

import com.agnie.gwt.common.client.I18;
import com.google.gwt.cell.client.TextCell;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiFactory;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.cellview.client.CellList;
import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.ListDataProvider;
import com.google.gwt.view.client.SelectionChangeEvent;
import com.google.gwt.view.client.SingleSelectionModel;

/**
 * Simple suggestion box When end user press any key in search field ,suggestion list get displayed.
 * 
 */
public class SuggestionBox extends Composite {
    private static SuggestionBoxResources resource = SuggestionBoxResources.INSTANCE;

    static {
        resource.css().ensureInjected();
    }

    interface MyUiBinder extends UiBinder<Widget, SuggestionBox> {
    }

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

    @UiField
    TextBox search;
    @UiField
    CellList<String> list;

    ListDataProvider<String> dp = new ListDataProvider<String>();
    TextCell textCell = new TextCell();

    protected HTMLPanel container;

    public SuggestionBox() {
        container = (HTMLPanel) uiBinder.createAndBindUi(this);
        initWidget(container);
        list.setVisible(false);

        Label label = new Label(I18.messages.noData());
        list.setEmptyListWidget(label);

        dp.addDataDisplay(list);

        search.addKeyPressHandler(new KeyPressHandler() {

            @Override
            public void onKeyPress(KeyPressEvent event) {
                list.setVisible(true);
            }
        });

        list.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED);

        // Add a selection model to handle user selection.
        final SingleSelectionModel<String> selectionModel = new SingleSelectionModel<String>();
        list.setSelectionModel(selectionModel);
        selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
            public void onSelectionChange(SelectionChangeEvent event) {
                String selected = selectionModel.getSelectedObject();
                if (selected != null) {
                    Window.alert("You selected: " + selected);
                }
            }
        });

    }

    /**
     * Sets data to suggestion list
     * 
     * @param list
     * 
     */
    public void setData(List<String> list) {
        dp.setList(list);
    }

    public static SuggestionBoxResources getResources() {
        return resource;
    }

    @UiFactory
    public CellList<String> getCellList() {
        list = new CellList<String>(textCell);
        return list;
    }

}