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.*; public abstract class EventDelegateAdaptor implements EventDelegate { private final int m_eventBits; /** * Default constructor for convienence. Subclasses must override * {@link #getEventBits()} if they want to process events. */ public EventDelegateAdaptor() { m_eventBits = 0; } /** * Creates an event delegate which is interested in the specified bits. * * @param eventBits a bitmask of the events to process * * @see Event */ public EventDelegateAdaptor( int eventBits ) { m_eventBits = eventBits; } /* * (non-Javadoc) * @see asquare.gwt.tk.client.ui.behavior.EventDelegate#onBrowserEvent(com.google.gwt.user.client.ui.Widget, com.google.gwt.user.client.Event) */ @Override public void onBrowserEvent( Widget widget, Event event ) { if ( !doBrowserEvent( widget, event ) ) { DOM.eventPreventDefault( event ); DOM.eventCancelBubble( event, true ); } } /** * A convenience method for processing events. The event is cancelled if the * return value is false. * * @return false to cancel the event */ protected boolean doBrowserEvent( Widget widget, Event event ) { return true; } /** * {@inheritDoc} * Override in subclass if using the default constructor. */ @Override public int getEventBits() { return m_eventBits; } } |