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Side by Side Diff: chrome/browser/ui/views/frame/scroll_end_effect_controller_ash.h

Issue 22265009: Implement initial version of scroll end effect Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Responded to outstanding comments from sadrul@ Created 7 years, 1 month ago
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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 #ifndef CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_ASH_H_ 5 #ifndef CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_ASH_H_
6 #define CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_ASH_H_ 6 #define CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_ASH_H_
7 7
8 #include "base/compiler_specific.h" 8 #include "base/compiler_specific.h"
9 #include "base/memory/scoped_ptr.h"
9 #include "chrome/browser/ui/views/frame/scroll_end_effect_controller.h" 10 #include "chrome/browser/ui/views/frame/scroll_end_effect_controller.h"
11 #include "ui/compositor/layer.h"
12 #include "ui/gfx/animation/animation_delegate.h"
13 #include "ui/gfx/animation/slide_animation.h"
14 #include "ui/gfx/rect.h"
15 #include "ui/gfx/transform.h"
10 16
11 class ScrollEndEffectControllerAsh : public ScrollEndEffectController { 17 namespace views {
18 class View;
19 }
20
21 // Class that implements the scroll end effect by controlling the layout of
22 // layers and the transforms applied to them. This class depends heavily on
23 // ScrollEndEffectControllerDelegate, which is implemented in BrowserView.
24 class ScrollEndEffectControllerAsh : public ScrollEndEffectController,
25 public gfx::AnimationDelegate {
12 public: 26 public:
13 ScrollEndEffectControllerAsh(); 27 explicit ScrollEndEffectControllerAsh(
28 ScrollEndEffectControllerDelegate* delegate);
14 virtual ~ScrollEndEffectControllerAsh(); 29 virtual ~ScrollEndEffectControllerAsh();
15 30
16 // ScrollEndEffectController overides: 31 // ScrollEndEffectController overrides:
17 virtual void OverscrollUpdate(int delta_y) OVERRIDE; 32 virtual void OverscrollUpdate(int delta_y) OVERRIDE;
18 33
34 // gfx::AnimationDelegate overrides:
35 virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE;
36 virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
37
19 private: 38 private:
39 friend class ScrollEndEffectControllerAshTest;
40
41 // Sets up the layer hierarchy for showing the effect. This involves making
42 // sure everything is on a layer and inserting clipping layers into the
43 // hierarchy.
44 void ActivateEffect();
45
46 // Restores the layer hierarchy and states to what they were before the effect
47 // was actived.
48 void DeactivateEffect();
49
50 // Computes the transforms and counter transforms that are needed to produce
51 // the desired effect then applies them. The bounds of the layers may be
52 // adjusted due to a call to SetBoundsForEffect, so need to be stored before
53 // calling. The entire window is scaled and possibly translated to produce the
54 // squishing effect. The non-client area and the content are counter scaled to
55 // preserve their size and translated/clipped to fit in the smaller window.
56 void ApplyDelta(int delta_y);
57
58 ScrollEndEffectControllerDelegate* delegate_; // non-owned
59 bool is_effect_active_;
60
61 // The size of the frame at the beginning of the effect, so that the effect
62 // can scale relative to it and the value can be restored at the end.
63 gfx::Rect frame_bounds_;
64
65 // Control variables related to the current delta_y being applied for the
66 // effect and used when animating.
67 int start_delta_y_;
68 int current_delta_y_;
69 int end_delta_y_;
70
71 scoped_ptr<gfx::SlideAnimation> animation_;
72
20 DISALLOW_COPY_AND_ASSIGN(ScrollEndEffectControllerAsh); 73 DISALLOW_COPY_AND_ASSIGN(ScrollEndEffectControllerAsh);
21 }; 74 };
22 75
23 #endif // CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_ASH_H_ 76 #endif // CHROME_BROWSER_UI_VIEWS_FRAME_SCROLL_END_EFFECT_CONTROLLER_ASH_H_
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