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/*
@ITMillApache2LicenseForJavaFiles@
*/
package com.vaadin.tests;
import java.sql.SQLException;
import com.vaadin.data.util.QueryContainer;
import com.vaadin.demo.util.SampleDatabase;
import com.vaadin.event.Action;
import com.vaadin.ui.Label;
import com.vaadin.ui.Select;
import com.vaadin.ui.Table;
import com.vaadin.ui.Tree;
import com.vaadin.ui.Window;
/**
* This example shows how Table, Select and Tree UI components can use
* Containers. QueryContainer is used to bind SQL table rows into Toolkit UI
* components. Table has few example actions added. Also embedding XHTML through
* Label components is used. Demonstrates: how to create
* <code>com.vaadin.data.Container</code> and set it as datasource to UI
* components <code>com.vaadin.ui.Component.Tree</code>, how to receive
* ExpandEvent and implement
* <code>com.vaadin.ui.Tree.ExpandListener</code>, how to use
* <code>com.vaadin.event.Action</code>.
*
* @author IT Mill Ltd.
* @since 4.0.0
*
*/
public class QueryContainerDemo extends com.vaadin.Application
implements Action.Handler {
private static final String ACTION_DESCRIPTION = "Try right mouse button to initiate "
+ "actions menu.<br />Note: on Opera you use meta key "
+ "and left mouse button.";
private static final String TABLE_CAPTION = SampleDatabase.ROWCOUNT
+ " dynamically loaded rows from example SQL table";
// Table component where SQL rows are attached (using QueryContainer)
private final Table table = new Table();
private final Label tableLastAction = new Label(
"No action selected for table.");
// Select component where SQL rows are attached (using QueryContainer)
private final Select select = new Select();
// Tree component that uses select as datasource
private final Tree tree = new Tree();
private final Label treeLastAction = new Label(
"No action selected for tree.");
// Database provided with sample data
private SampleDatabase sampleDatabase;
// Example Actions for table
private final Action ACTION1 = new Action("Upload");
private final Action ACTION2 = new Action("Download");
private final Action ACTION3 = new Action("Show history");
private final Action[] actions = new Action[] { ACTION1, ACTION2, ACTION3 };
/**
* Initialize Application. Demo components are added to main window.
*/
@Override
public void init() {
final Window main = new Window("QueryContainer demo");
setMainWindow(main);
// Main window contains heading, table, select and tree
main
.addComponent(new Label(
"<h2>QueryContainer demo</h2>"
+ "<b>Rows are loaded from the server as they are needed.<br />"
+ "Try scrolling the table to see it in action.</b><br />"
+ ACTION_DESCRIPTION, Label.CONTENT_XHTML));
main.addComponent(table);
main.addComponent(tableLastAction);
main.addComponent(new Label("<hr />", Label.CONTENT_XHTML));
main.addComponent(select);
main.addComponent(new Label("<hr />", Label.CONTENT_XHTML));
main.addComponent(tree);
main.addComponent(treeLastAction);
// create demo database
sampleDatabase = new SampleDatabase();
// initialize demo components
initTable();
initSelect();
initTree();
}
/**
* Populates table component with all rows from employee table.
*
*/
private void initTable() {
// init table
table.setCaption(TABLE_CAPTION);
table.setPageLength(10);
table.setSelectable(true);
table.setRowHeaderMode(Table.ROW_HEADER_MODE_INDEX);
table.setColumnCollapsingAllowed(true);
table.setColumnReorderingAllowed(true);
table.setSelectable(true);
// this class handles table actions (see handleActions method below)
table.addActionHandler(this);
table.setDescription(ACTION_DESCRIPTION);
// populate Toolkit table component with test SQL table rows
try {
final QueryContainer qc = new QueryContainer(
"SELECT * FROM employee", sampleDatabase.getConnection());
table.setContainerDataSource(qc);
} catch (final SQLException e) {
e.printStackTrace();
}
// define which columns should be visible on Table component
table.setVisibleColumns(new Object[] { "FIRSTNAME", "LASTNAME",
"TITLE", "UNIT" });
table.setItemCaptionPropertyId("ID");
}
/**
* Populates select component with distinct unit values from employee table.
*
*/
private void initSelect() {
// init select
select.setCaption("All distinct units from employee table.");
select.setItemCaptionPropertyId("UNIT");
// populate Toolkit select component with test SQL table rows
try {
final QueryContainer qc = new QueryContainer(
"SELECT DISTINCT UNIT FROM employee", sampleDatabase
.getConnection());
select.setContainerDataSource(qc);
} catch (final SQLException e) {
e.printStackTrace();
}
}
/**
* Populates tree component using select component as data source for root
* nodes, child nodes are queried from database. Implementation is done for
* example purposes only.
*
*/
private void initTree() {
// init tree
tree.setCaption("All distinct units from employee table.");
tree.setItemCaptionPropertyId("UNIT");
tree.setSelectable(true);
// this class handles tree actions (see handleActions method below)
tree.addActionHandler(this);
tree.setDescription("Try right mouse button to initiate "
+ "actions menu. Note: on Opera you use meta key "
+ "and left mouse button.");
// Populate Toolkit Tree using select component as data source
tree.setContainerDataSource(select.getContainerDataSource());
}
/**
* Return example actions
*/
public Action[] getActions(Object target, Object sender) {
return actions;
}
/**
* Executed by right mouse button on table or tree component.
*/
public void handleAction(Action action, Object sender, Object target) {
if (sender == table) {
tableLastAction.setValue("Last action clicked was '"
+ action.getCaption() + "' on item " + target);
} else if (sender == tree) {
treeLastAction.setValue("Last action clicked was '"
+ action.getCaption() + "' on item " + target);
}
}
}
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