| /* |
| * Copyright 2008 Google Inc. |
| * |
| * 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.gwt.event.logical.shared; |
| |
| import com.google.gwt.event.shared.GwtEvent; |
| |
| /** |
| * Represents a close event. |
| * |
| * @param <T> the type being closed |
| */ |
| public class CloseEvent<T> extends GwtEvent<CloseHandler<T>> { |
| |
| /** |
| * Handler type. |
| */ |
| private static Type<CloseHandler<?>> TYPE; |
| |
| /** |
| * Fires a close event on all registered handlers in the handler manager. If |
| * no such handlers exist, this method will do nothing. |
| * |
| * @param <T> the target type |
| * @param source the source of the handlers |
| * @param target the target |
| */ |
| public static <T> void fire(HasCloseHandlers<T> source, T target) { |
| fire(source, target, false); |
| } |
| |
| /** |
| * Fires a close event on all registered handlers in the handler manager. |
| * |
| * @param <T> the target type |
| * @param source the source of the handlers |
| * @param target the target |
| * @param autoClosed was the target closed automatically |
| */ |
| public static <T> void fire(HasCloseHandlers<T> source, T target, |
| boolean autoClosed) { |
| if (TYPE != null) { |
| CloseEvent<T> event = new CloseEvent<T>(target, autoClosed); |
| source.fireEvent(event); |
| } |
| } |
| |
| /** |
| * Gets the type associated with this event. |
| * |
| * @return returns the handler type |
| */ |
| public static Type<CloseHandler<?>> getType() { |
| return TYPE != null ? TYPE : (TYPE = new Type<CloseHandler<?>>()); |
| } |
| |
| private final T target; |
| |
| private final boolean autoClosed; |
| |
| /** |
| * Creates a new close event. |
| * |
| * @param target the target |
| * @param autoClosed whether it is auto closed |
| */ |
| protected CloseEvent(T target, boolean autoClosed) { |
| this.autoClosed = autoClosed; |
| this.target = target; |
| } |
| |
| // The instance knows its of type T, but the TYPE |
| // field itself does not, so we have to do an unsafe cast here. |
| @SuppressWarnings("unchecked") |
| @Override |
| public final Type<CloseHandler<T>> getAssociatedType() { |
| return (Type) TYPE; |
| } |
| |
| /** |
| * Gets the target. |
| * |
| * @return the target |
| */ |
| public T getTarget() { |
| return target; |
| } |
| |
| /** |
| * Was the target automatically closed? |
| * |
| * @return auto closed |
| */ |
| public boolean isAutoClosed() { |
| return autoClosed; |
| } |
| |
| @Override |
| protected void dispatch(CloseHandler<T> handler) { |
| handler.onClose(this); |
| } |
| } |