01: /*
02: * Copyright 2006 Google Inc.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License"); you may not
05: * use this file except in compliance with the License. You may obtain a copy of
06: * the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12: * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13: * License for the specific language governing permissions and limitations under
14: * the License.
15: */
16: package com.google.gwt.user.client;
17:
18: /**
19: * A listener interface for previewing browser events.
20: *
21: * @see com.google.gwt.user.client.DOM#addEventPreview(EventPreview)
22: */
23: public interface EventPreview {
24:
25: /**
26: * Called when a browser event occurs and this event preview is on top of the
27: * preview stack.
28: *
29: * @param event the browser event
30: * @return <code>false</code> to cancel the event
31: * @see DOM#addEventPreview(EventPreview)
32: */
33: boolean onEventPreview(Event event);
34: }
|