/*
* Copyright 2008-2013 Sergey Skladchikov
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.geogebra.web.web.gui.advanced.client.ui.widget.combo;
import com.google.gwt.user.client.ui.Widget;
/**
* This is a list item factory that helps to produce items in the
* {@link org.geogebra.web.web.gui.advanced.client.ui.widget.ListPopupPanel}.
*
* @author <a href="mailto:sskladchikov@gmail.com">Sergey Skladchikov</a>
* @since 1.2.0
*/
public interface ListItemFactory {
/**
* This method creates a new widget that should be inserted into the list.
*
* @param value is a value to be used to construct the widget.
* @return a widget instance (can be equal to <code>null</code>).
*/
Widget createWidget(Object value);
/**
* This method should convert the value to the text to be displayed in the selection text box.
*
* @param value is a value to be converted.
* @return textual representation of the value.
*/
String convert(Object value);
}