001package org.gwtbootstrap3.client.ui.impl;
002
003/*
004 * #%L
005 * GwtBootstrap3
006 * %%
007 * Copyright (C) 2013 - 2014 GwtBootstrap3
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023import org.gwtbootstrap3.client.ui.Radio;
024
025import com.google.gwt.dom.client.Element;
026import com.google.gwt.event.dom.client.BlurEvent;
027import com.google.gwt.event.dom.client.BlurHandler;
028import com.google.gwt.event.dom.client.ClickEvent;
029import com.google.gwt.event.dom.client.ClickHandler;
030import com.google.gwt.event.dom.client.KeyDownEvent;
031import com.google.gwt.event.dom.client.KeyDownHandler;
032import com.google.gwt.event.dom.client.MouseUpEvent;
033import com.google.gwt.event.dom.client.MouseUpHandler;
034import com.google.gwt.event.logical.shared.ValueChangeEvent;
035import com.google.gwt.user.client.Event;
036
037/**
038 * This implementation will work in most cases.
039 *
040 * This case is not supported:
041 *
042 * 1. Given a group of two Radios
043 * 2. Select the first with a click on either input or label
044 * 3. Select the second with a click on either input or label
045 * 4. Select the first using the keyboard
046 *
047 * You will notice that 4 does not trigger a ValueChangeEvent.
048 *
049 */
050public class RadioImplIE8 extends RadioImpl {
051
052    private static class Handler implements ClickHandler, MouseUpHandler, BlurHandler, KeyDownHandler {
053
054        private final Radio radio;
055        private Boolean oldValue;
056
057        public Handler(Radio radio) {
058            this.radio = radio;
059        }
060
061        @Override
062        public void onClick(ClickEvent event) {
063            ValueChangeEvent.fireIfNotEqual(radio, oldValue, radio.getValue());
064        }
065
066        @Override
067        public void onKeyDown(KeyDownEvent event) {
068            oldValue = radio.getValue();
069        }
070
071        @Override
072        public void onBlur(BlurEvent event) {
073            oldValue = radio.getValue();
074        }
075
076        @Override
077        public void onMouseUp(MouseUpEvent event) {
078            oldValue = radio.getValue();
079        }
080
081    }
082
083    @Override
084    public void ensureDomEventHandlers(final Radio radio) {
085        final Handler handler = new Handler(radio);
086        radio.addClickHandler(handler);
087        radio.addMouseUpHandler(handler);
088        radio.addBlurHandler(handler);
089        radio.addKeyDownHandler(handler);
090    }
091
092    @Override
093    public void sinkEvents(int eventBitsToAdd, Element inputElem,
094            Element labelElem) {
095        Event.sinkEvents(inputElem,
096                eventBitsToAdd | Event.getEventsSunk(inputElem));
097        Event.sinkEvents(labelElem,
098                eventBitsToAdd | Event.getEventsSunk(labelElem));
099    }
100
101}