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Side by Side Diff: WebCore/platform/ScrollAnimator.h

Issue 3305022: Merge 67052 - Not reviewed, layout test fix.... (Closed) Base URL: http://svn.webkit.org/repository/webkit/branches/chromium/517/
Patch Set: Created 10 years, 3 months ago
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1 /* 1 /*
2 * Copyright (c) 2010, Google Inc. All rights reserved. 2 * Copyright (c) 2010, Google Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are 5 * modification, are permitted provided that the following conditions are
6 * met: 6 * met:
7 * 7 *
8 * * Redistributions of source code must retain the above copyright 8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer. 9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above 10 * * Redistributions in binary form must reproduce the above
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34 #include "ScrollTypes.h" 34 #include "ScrollTypes.h"
35 35
36 namespace WebCore { 36 namespace WebCore {
37 37
38 class ScrollbarClient; 38 class ScrollbarClient;
39 39
40 class ScrollAnimator { 40 class ScrollAnimator {
41 public: 41 public:
42 static ScrollAnimator* create(ScrollbarClient*); 42 static ScrollAnimator* create(ScrollbarClient*);
43 43
44 ScrollAnimator(ScrollbarClient* client) : m_client(client) { } 44 ScrollAnimator(ScrollbarClient* client);
45 virtual ~ScrollAnimator() { } 45 virtual ~ScrollAnimator();
46 46
47 // Computes a scroll destination for the given parameters. Returns false if 47 // Computes a scroll destination for the given parameters. Returns false if
48 // already at the destination. Otherwise, starts scrolling towards the 48 // already at the destination. Otherwise, starts scrolling towards the
49 // destination and returns true. Scrolling may be immediate or animated. 49 // destination and returns true. Scrolling may be immediate or animated.
50 // The base class implementation always scrolls immediately, never animates. 50 // The base class implementation always scrolls immediately, never animates.
51 virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, flo at multiplier); 51 virtual bool scroll(ScrollbarOrientation, ScrollGranularity, float step, flo at multiplier);
52 52
53 // Stops any animation in the given direction and updates the ScrollAnimator 53 // Stops any animation in the given direction and updates the ScrollAnimator
54 // with the current scroll position. This does not cause a callback to the 54 // with the current scroll position. This does not cause a callback to the
55 // ScrollbarClient. 55 // ScrollbarClient.
56 virtual void setScrollPositionAndStopAnimation(ScrollbarOrientation, float); 56 virtual void setScrollPositionAndStopAnimation(ScrollbarOrientation, float);
57 57
58 protected: 58 protected:
59 ScrollbarClient* m_client; 59 ScrollbarClient* m_client;
60 float m_currentPosX; // We avoid using a FloatPoint in order to reduce 60 float m_currentPosX; // We avoid using a FloatPoint in order to reduce
61 float m_currentPosY; // subclass code complexity. 61 float m_currentPosY; // subclass code complexity.
62 }; 62 };
63 63
64 } // namespace WebCore 64 } // namespace WebCore
65 #endif 65 #endif
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