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

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

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.RadioButton;
import com.google.gwt.user.client.ui.Widget;
import com.itmill.toolkit.terminal.gwt.client.UIDL;

public class IOptionGroup extends IOptionGroupBase {

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

	private Panel panel;

	private Map optionsToKeys;

	public IOptionGroup() {
		super(CLASSNAME);
		panel = (Panel) optionsContainer;
		optionsToKeys = new HashMap();
	}

	/*
	 * Return true if no elements were changed, false otherwise.
	 */
	protected void buildOptions(UIDL uidl) {
		panel.clear();
		for (Iterator it = uidl.getChildIterator(); it.hasNext();) {
			UIDL opUidl = (UIDL) it.next();
			CheckBox op;
			if (multiselect) {
				op = new ICheckBox();
				op.setText(opUidl.getStringAttribute("caption"));
			} else {
				op = new RadioButton(id, opUidl.getStringAttribute("caption"));
				op.setStyleName("i-radiobutton");
			}
			op.addStyleName(CLASSNAME_OPTION);
			op.setChecked(opUidl.getBooleanAttribute("selected"));
			op.setEnabled(!opUidl.getBooleanAttribute("disabled") && !readonly
					&& !disabled);
			op.addClickListener(this);
			optionsToKeys.put(op, opUidl.getStringAttribute("key"));
			panel.add(op);
		}
	}

	protected Object[] getSelectedItems() {
		return selectedKeys.toArray();
	}

	public void onClick(Widget sender) {
		super.onClick(sender);
		if (sender instanceof CheckBox) {
			boolean selected = ((CheckBox) sender).isChecked();
			String key = (String) optionsToKeys.get(sender);
			if (!multiselect)
				selectedKeys.clear();
			if (selected)
				selectedKeys.add(key);
			else
				selectedKeys.remove(key);
			client
					.updateVariable(id, "selected", getSelectedItems(),
							immediate);
		}
	}

}