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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 | |
3 // found in the LICENSE file. | |
4 | |
5 package org.chromium.content.browser; | |
6 | |
7 /** | |
8 * Used to register listeners that can be notified of changes to the position of a view. | |
9 */ | |
10 | |
Ted C
2013/10/10 18:16:32
remove extra blank line
cjhopman
2013/10/10 21:35:23
Done.
| |
11 public interface PositionObserverInterface { | |
12 public interface Listener { | |
13 /** | |
14 * Called during predraw if the position of the underlying view has chan ged. | |
15 */ | |
16 public void onPositionChanged(int positionX, int positionY); | |
17 } | |
18 | |
19 /** | |
20 * @return The current x position of the observed view. | |
21 */ | |
22 public int getPositionX(); | |
23 | |
24 /** | |
25 * @return The current y position of the observed view. | |
26 */ | |
27 public int getPositionY(); | |
28 | |
29 /** | |
30 * Register a listener to be called when the position of the underlying view changes. | |
31 */ | |
32 public void addListener(Listener listener); | |
33 | |
34 /** | |
35 * Remove a previously installed listener. | |
36 */ | |
37 public void removeListener(Listener listener); | |
38 } | |
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