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Java > Open Source Codes > com > google > gwt > user > client > ui > MouseWheelListener


1 /*
2  * Copyright 2007 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
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.ui;
17
18 import java.util.EventListener JavaDoc;
19
20 /**
21  * Event listener interface for mouse wheel events.
22  */
23 public interface MouseWheelListener extends EventListener JavaDoc {
24
25   /**
26    * Fired when the user scrolls the mouse wheel over a widget.
27    *
28    * @param sender the widget sending the event
29    * @param velocity the velocity information for the wheel event
30    */
31   void onMouseWheel(Widget sender, MouseWheelVelocity velocity);
32 }
33
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