Java tutorial
/* * 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; import com.google.gwt.event.shared.HasHandlers; /** * Fired when the event source is resized. */ public class ResizeEvent extends GwtEvent<ResizeHandler> { /** * The event type. */ private static Type<ResizeHandler> TYPE; /** * Fires a resize event on all registered handlers in the handler source. * * @param <S> The handler source * @param source the source of the handlers * @param width the new width * @param height the new height */ public static <S extends HasResizeHandlers & HasHandlers> void fire(S source, int width, int height) { if (TYPE != null) { ResizeEvent event = new ResizeEvent(width, height); source.fireEvent(event); } } /** * Ensures the existence of the handler hook and then returns it. * * @return returns a handler hook */ public static Type<ResizeHandler> getType() { if (TYPE == null) { TYPE = new Type<ResizeHandler>(); } return TYPE; } private final int width; private final int height; /** * Construct a new {@link ResizeEvent}. * * @param width the new width * @param height the new height */ protected ResizeEvent(int width, int height) { this.width = width; this.height = height; } @Override public final Type<ResizeHandler> getAssociatedType() { return TYPE; } /** * Returns the new height. * * @return the new height */ public int getHeight() { return height; } /** * Returns the new width. * * @return the new width */ public int getWidth() { return width; } @Override public String toDebugString() { assertLive(); return super.toDebugString() + " width = " + width + " height =" + height; } @Override protected void dispatch(ResizeHandler handler) { handler.onResize(this); } }