vaadin-framework/src/com/itmill/toolkit/terminal/gwt/client/ui/ISelect.java

package com.itmill.toolkit.terminal.gwt.client.ui;

import java.util.Iterator;
import java.util.Vector;

import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.Widget;
import com.itmill.toolkit.terminal.gwt.client.UIDL;

public class ISelect extends IOptionGroupBase {

	public static final String CLASSNAME = "i-select";

	private static final int VISIBLE_COUNT = 10;

	private ListBox select;

	public ISelect() {
		super(new ListBox(), CLASSNAME);
		select = (ListBox) optionsContainer;
		select.addChangeListener(this);
		select.setStyleName(CLASSNAME + "-select");
	}

	protected void buildOptions(UIDL uidl) {
		select.setMultipleSelect(multiselect);
		if (multiselect)
			select.setVisibleItemCount(VISIBLE_COUNT);
		else
			select.setVisibleItemCount(1);
		select.setEnabled(!disabled && !readonly);
		select.clear();
		for (Iterator i = uidl.getChildIterator(); i.hasNext();) {
			UIDL optionUidl = (UIDL) i.next();
			select.addItem(optionUidl.getStringAttribute("caption"), optionUidl
					.getStringAttribute("key"));
			if (optionUidl.hasAttribute("selected"))
				select.setItemSelected(select.getItemCount() - 1, true);
		}
	}

	protected Object[] getSelectedItems() {
		Vector selectedItemKeys = new Vector();
		for (int i = 0; i < select.getItemCount(); i++) {
			if (select.isItemSelected(i))
				selectedItemKeys.add(select.getValue(i));
		}
		return selectedItemKeys.toArray();
	}

	public void onChange(Widget sender) {
		if (select.isMultipleSelect())
			client
					.updateVariable(id, "selected", getSelectedItems(),
							immediate);
		else
			client.updateVariable(id, "selected", new String[] { ""
					+ getSelectedItem() }, immediate);
	}
}