OLD | NEW |
1 // Copyright 2011 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 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 #ifndef CCInputHandler_h | 5 // Temporary forwarding header |
6 #define CCInputHandler_h | 6 #include "cc/input_handler.h" |
7 | |
8 #include "base/basictypes.h" | |
9 #include <wtf/PassOwnPtr.h> | |
10 | |
11 namespace cc { | |
12 | |
13 class IntPoint; | |
14 class IntSize; | |
15 | |
16 // The CCInputHandler is a way for the embedders to interact with | |
17 // the impl thread side of the compositor implementation. | |
18 // | |
19 // There is one CCInputHandler for every CCLayerTreeHost. It is | |
20 // created on the main thread and used only on the impl thread. | |
21 // | |
22 // The CCInputHandler is constructed with a CCInputHandlerClient, which is the | |
23 // interface by which the handler can manipulate the LayerTree. | |
24 class CCInputHandlerClient { | |
25 public: | |
26 enum ScrollStatus { ScrollOnMainThread, ScrollStarted, ScrollIgnored }; | |
27 enum ScrollInputType { Gesture, Wheel }; | |
28 | |
29 // Selects a layer to be scrolled at a given point in window coordinates. | |
30 // Returns ScrollStarted if the layer at the coordinates can be scrolled, | |
31 // ScrollOnMainThread if the scroll event should instead be delegated to the | |
32 // main thread, or ScrollIgnored if there is nothing to be scrolled at the | |
33 // given coordinates. | |
34 virtual ScrollStatus scrollBegin(const IntPoint&, ScrollInputType) = 0; | |
35 | |
36 // Scroll the selected layer starting at the given window coordinate. If | |
37 // there is no room to move the layer in the requested direction, its first | |
38 // ancestor layer that can be scrolled will be moved instead. Should only be | |
39 // called if scrollBegin() returned ScrollStarted. | |
40 virtual void scrollBy(const IntPoint&, const IntSize&) = 0; | |
41 | |
42 // Stop scrolling the selected layer. Should only be called if scrollBegin() | |
43 // returned ScrollStarted. | |
44 virtual void scrollEnd() = 0; | |
45 | |
46 virtual void pinchGestureBegin() = 0; | |
47 virtual void pinchGestureUpdate(float magnifyDelta, const IntPoint& anchor)
= 0; | |
48 virtual void pinchGestureEnd() = 0; | |
49 | |
50 virtual void startPageScaleAnimation(const IntSize& targetPosition, | |
51 bool anchorPoint, | |
52 float pageScale, | |
53 double startTime, | |
54 double duration) = 0; | |
55 | |
56 // Request another callback to CCInputHandler::animate(). | |
57 virtual void scheduleAnimation() = 0; | |
58 | |
59 protected: | |
60 CCInputHandlerClient() { } | |
61 virtual ~CCInputHandlerClient() { } | |
62 | |
63 private: | |
64 DISALLOW_COPY_AND_ASSIGN(CCInputHandlerClient); | |
65 }; | |
66 | |
67 class CCInputHandler { | |
68 public: | |
69 virtual ~CCInputHandler() { } | |
70 | |
71 virtual void bindToClient(CCInputHandlerClient*) = 0; | |
72 virtual void animate(double monotonicTime) = 0; | |
73 | |
74 protected: | |
75 CCInputHandler() { } | |
76 | |
77 private: | |
78 DISALLOW_COPY_AND_ASSIGN(CCInputHandler); | |
79 }; | |
80 | |
81 } | |
82 | |
83 #endif | |
OLD | NEW |