vaadin-framework/src/com/itmill/toolkit/demo/SelectDemo.java

/* 
@ITMillApache2LicenseForJavaFiles@
 */

package com.itmill.toolkit.demo;

import java.sql.SQLException;

import com.itmill.toolkit.data.util.QueryContainer;
import com.itmill.toolkit.demo.util.SampleDatabase;
import com.itmill.toolkit.ui.Label;
import com.itmill.toolkit.ui.Panel;
import com.itmill.toolkit.ui.Select;
import com.itmill.toolkit.ui.Window;
import com.itmill.toolkit.ui.AbstractSelect.Filtering;

/**
 * This example demonstrates what is lazy loading feature on Select component.
 * Demo Uses similar concepts to QueryContainerDemo.
 * 
 * @author IT Mill Ltd.
 * @since 4.0.0
 * 
 */
public class SelectDemo extends com.itmill.toolkit.Application {

    // Select component where SQL rows are attached (using QueryContainer)
    private final Select select = new Select();

    private final Select lazySelect = new Select();

    // Database provided with sample data
    private SampleDatabase sampleDatabase;

    /**
     * Initialize Application. Demo components are added to main window.
     */
    public void init() {
        final Window main = new Window("Select demo");
        setMainWindow(main);

        // Main window contains heading, table, select and tree
        final Panel panel = new Panel("Select demo (a.k.a Google Suggests)");
        panel.addComponent(lazySelect);
        panel.addComponent(new Label("<hr />", Label.CONTENT_XHTML));
        panel.addComponent(select);
        main.addComponent(panel);

        // create demo database
        sampleDatabase = new SampleDatabase();

        initSelects();
    }

    private void initSelects() {
        // init select
        select.setCaption("All employees default functionality.");
        select.setItemCaptionPropertyId("WORKER");
        // populate Toolkit select component with test SQL table rows
        try {
            final QueryContainer qc = new QueryContainer(
                    "SELECT ID, UNIT||', '||LASTNAME||' '||FIRSTNAME"
                            + " AS WORKER FROM employee ORDER BY WORKER",
                    sampleDatabase.getConnection());
            select.setContainerDataSource(qc);
        } catch (final SQLException e) {
            e.printStackTrace();
        }

        // init lazySelect
        lazySelect.setCaption("All employees with lazy loading "
                + "(a.k.a Google Suggests) activated.");
        lazySelect.setItemCaptionPropertyId("WORKER");
        lazySelect.setFilteringMode(Filtering.FILTERINGMODE_CONTAINS);

        // use same datasource as select object uses
        lazySelect.setContainerDataSource(select.getContainerDataSource());
    }

}