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package com.vaadin.tests;
import java.util.Random;
import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.Panel;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.v7.data.Item;
import com.vaadin.v7.ui.AbstractSelect;
import com.vaadin.v7.ui.Select;
public class UsingCustomNewItemHandlerInSelect extends CustomComponent {
private final Select select = new Select();
public static Random random = new Random(1);
private static int sequence = 0;
public UsingCustomNewItemHandlerInSelect() {
VerticalLayout pl = new VerticalLayout();
pl.setMargin(true);
final Panel panel = new Panel("Select demo", pl);
pl.addComponent(select);
select.setCaption("Select component");
select.setImmediate(true);
select.addContainerProperty("CAPTION", String.class, "");
select.setItemCaptionMode(Select.ITEM_CAPTION_MODE_PROPERTY);
select.setItemCaptionPropertyId("CAPTION");
select.setNewItemsAllowed(true);
select.setNewItemHandler(new MyNewItemHandler());
populateSelect();
setCompositionRoot(panel);
}
public void populateSelect() {
final String[] names = { "John", "Mary", "Joe", "Sarah", "Jeff", "Jane",
"Peter", "Marc", "Josie", "Linus" };
for (int j = 0; j < 4; j++) {
Integer id = new Integer(sequence++);
Item item = select.addItem(id);
item.getItemProperty("CAPTION").setValue(
id + ": " + names[random.nextInt() % names.length]);
}
}
public class MyNewItemHandler implements AbstractSelect.NewItemHandler {
@Override
public void addNewItem(String newItemCaption) {
// here could be db insert or other backend operation
Integer id = new Integer(sequence++);
Item item = select.addItem(id);
item.getItemProperty("CAPTION")
.setValue(id + ": " + newItemCaption);
select.setValue(id);
}
}
}
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