| /* |
| * 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 open event. |
| * |
| * @param <T> the type being opened |
| */ |
| public class OpenEvent<T> extends GwtEvent<OpenHandler<T>> { |
| |
| /** |
| * Handler type. |
| */ |
| private static Type<OpenHandler<?>> TYPE; |
| |
| /** |
| * Fires a open 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(HasOpenHandlers<T> source, T target) { |
| if (TYPE != null) { |
| OpenEvent<T> event = new OpenEvent<T>(target); |
| source.fireEvent(event); |
| } |
| } |
| |
| /** |
| * Gets the type associated with this event. |
| * |
| * @return returns the handler type |
| */ |
| public static Type<OpenHandler<?>> getType() { |
| if (TYPE == null) { |
| TYPE = new Type<OpenHandler<?>>(); |
| } |
| return TYPE; |
| } |
| |
| private final T target; |
| |
| /** |
| * Creates a new open event. |
| * |
| * @param target the ui object being opened |
| */ |
| protected OpenEvent(T target) { |
| this.target = target; |
| } |
| |
| @SuppressWarnings("unchecked") |
| @Override |
| public final Type<OpenHandler<T>> getAssociatedType() { |
| return (Type) TYPE; |
| } |
| |
| /** |
| * Gets the target. |
| * |
| * @return the target |
| */ |
| public T getTarget() { |
| return target; |
| } |
| |
| // Because of type erasure, our static type is |
| // wild carded, yet the "real" type should use our I param. |
| |
| @Override |
| protected void dispatch(OpenHandler<T> handler) { |
| handler.onOpen(this); |
| } |
| } |