| // Copyright (C) 2010 The Android Open Source Project |
| // |
| // 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 com.google.gerrit.client.ui; |
| |
| import com.google.gwt.event.logical.shared.HasValueChangeHandlers; |
| import com.google.gwt.event.logical.shared.ValueChangeEvent; |
| import com.google.gwt.event.logical.shared.ValueChangeHandler; |
| import com.google.gwt.event.shared.GwtEvent; |
| import com.google.gwt.event.shared.HandlerManager; |
| import com.google.gwt.event.shared.HandlerRegistration; |
| |
| |
| public class ListenableValue<T> implements HasValueChangeHandlers<T> { |
| |
| private HandlerManager manager = new HandlerManager(this); |
| |
| private T value; |
| |
| public T get() { |
| return value; |
| } |
| |
| public void set(final T value) { |
| this.value = value; |
| fireEvent(new ValueChangeEvent<T>(value) {}); |
| } |
| |
| public void fireEvent(GwtEvent<?> event) { |
| manager.fireEvent(event); |
| } |
| |
| public HandlerRegistration addValueChangeHandler( |
| ValueChangeHandler<T> handler) { |
| return manager.addHandler(ValueChangeEvent.getType(), handler); |
| } |
| |
| public int getHandlerCount() { |
| return manager.getHandlerCount(ValueChangeEvent.getType()); |
| } |
| |
| public ValueChangeHandler<?> getHandler(int index) { |
| return manager.getHandler(ValueChangeEvent.getType(), index); |
| } |
| |
| } |