litesoft
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// This Source Code is Copyright & Licenced as indicated below package org.litesoft.GWT.client.widgets.nonpublic.external; /* * Copyright 2006 Mat Gessel <mat.gessel@gmail.com> * * 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. */ import com.google.gwt.user.client.*; import com.google.gwt.user.client.ui.*; /** * An EventDelegate processes events from a widget. * <p/> * Example: <br/> To override default focus behavior you need to preview and * cancel tab events. The KeyboardListener interface does not receive the actual * events. EventPreview is really intended for popups and dialogs and will not * function if another popup/dialog is shown (think a non-modal dialog or popup * without autoclose). A solution is to have widget can delegate events to a * focus manager implementing EventDelegate. * </p> */ public interface EventDelegate { /** * Get a bitmask representing events this delegate is interested in * processing. * * @return a bitmask of the events to process * * @see Event */ int getEventBits(); /** * Call this from your widget's onBrowserEvent() method * to to delegate events. * <p/> * <p>Example: <p> * <pre> * public void onBrowserEvent(Event event) * { * super.onBrowserEvent(event); * delegate.onBrowserEvent(this, event); * } * </pre> * * @param widget the wiget that originated the event * @param event the event */ void onBrowserEvent( Widget widget, Event event ); } |