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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.*;
/**
* 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 Select select = new Select();
private Select lazySelect = new Select();
// Database provided with sample data
private SampleDatabase sampleDatabase;
/**
* Initialize Application. Demo components are added to main window.
*/
public void init() {
Window main = new Window("Select demo");
setMainWindow(main);
// set the application to use Corporate -theme
setTheme("corporate");
// Main window contains heading, table, select and tree
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 {
QueryContainer qc = new QueryContainer(
"SELECT ID, UNIT||', '||LASTNAME||' '||FIRSTNAME"
+ " AS WORKER FROM employee ORDER BY WORKER",
sampleDatabase.getConnection());
select.setContainerDataSource(qc);
} catch (SQLException e) {
e.printStackTrace();
}
// init lazySelect
lazySelect.setCaption("All employees with lazy loading "
+ "(a.k.a Google Suggests) activated.");
lazySelect.setItemCaptionPropertyId("WORKER");
// use lazy loading (a.k.a Google Suggest)
lazySelect.setLazyLoading(true);
// use same datasource as select object uses
lazySelect.setContainerDataSource(select.getContainerDataSource());
}
}
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