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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.content.browser; | 5 package org.chromium.content.browser; |
6 | 6 |
7 /** | 7 /** |
8 * Used to register listeners that can be notified of changes to the position of
a view. | 8 * Used to register listeners that can be notified of changes to the position of
a view. |
9 */ | 9 */ |
10 public interface PositionObserver { | 10 public interface PositionObserver { |
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27 | 27 |
28 /** | 28 /** |
29 * Register a listener to be called when the position of the underlying view
changes. | 29 * Register a listener to be called when the position of the underlying view
changes. |
30 */ | 30 */ |
31 void addListener(Listener listener); | 31 void addListener(Listener listener); |
32 | 32 |
33 /** | 33 /** |
34 * Remove a previously installed listener. | 34 * Remove a previously installed listener. |
35 */ | 35 */ |
36 void removeListener(Listener listener); | 36 void removeListener(Listener listener); |
| 37 |
| 38 /** |
| 39 * Clears registerned listener(s). |
| 40 */ |
| 41 void clearListener(); |
37 } | 42 } |
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