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1 // Copyright (c) 2012 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 #include "chrome/browser/ui/panels/panel_bounds_animation.h" | |
6 | |
7 #include "chrome/browser/ui/panels/panel.h" | |
8 #include "chrome/browser/ui/panels/panel_manager.h" | |
9 | |
10 namespace { | |
11 | |
12 // These values are experimental and subjective. | |
13 const int kDefaultFramerateHz = 50; | |
14 const int kSetBoundsAnimationMs = 180; | |
15 const int kSetBoundsAnimationBigMinimizeMs = 1500; | |
16 | |
17 } | |
18 | |
19 PanelBoundsAnimation::PanelBoundsAnimation(gfx::AnimationDelegate* target, | |
20 Panel* panel, | |
21 const gfx::Rect& initial_bounds, | |
22 const gfx::Rect& final_bounds) | |
23 : gfx::LinearAnimation(kDefaultFramerateHz, target), | |
24 panel_(panel), | |
25 for_big_minimize_(false), | |
26 animation_stop_to_show_titlebar_(0) { | |
27 // Detect animation that happens when expansion state is set to MINIMIZED | |
28 // and there is relatively big portion of the panel to hide from view. | |
29 // Initialize animation differently in this case, using fast-pause-slow | |
30 // method, see below for more details. | |
31 int duration = kSetBoundsAnimationMs; | |
32 if (initial_bounds.height() > final_bounds.height() && | |
33 panel_->expansion_state() == Panel::MINIMIZED) { | |
34 double hidden_title_height = | |
35 panel_->TitleOnlyHeight() - final_bounds.height(); | |
36 double distance_y = initial_bounds.height() - final_bounds.height(); | |
37 animation_stop_to_show_titlebar_ = 1.0 - hidden_title_height / distance_y; | |
38 if (animation_stop_to_show_titlebar_ > 0.7) { // Relatively big movement. | |
39 for_big_minimize_ = true; | |
40 duration = kSetBoundsAnimationBigMinimizeMs; | |
41 } | |
42 } | |
43 SetDuration(PanelManager::AdjustTimeInterval(duration)); | |
44 } | |
45 | |
46 PanelBoundsAnimation::~PanelBoundsAnimation() { | |
47 } | |
48 | |
49 double PanelBoundsAnimation::GetCurrentValue() const { | |
50 return ComputeAnimationValue(gfx::LinearAnimation::GetCurrentValue(), | |
51 for_big_minimize_, | |
52 animation_stop_to_show_titlebar_); | |
53 } | |
54 | |
55 double PanelBoundsAnimation::ComputeAnimationValue(double progress, | |
56 bool for_big_minimize, double animation_stop_to_show_titlebar) { | |
57 if (!for_big_minimize) { | |
58 // Cubic easing out. | |
59 double value = 1.0 - progress; | |
60 return 1.0 - value * value * value; | |
61 } | |
62 | |
63 // Minimize animation is done in 3 steps: | |
64 // 1. Quickly (0 -> 0.15) make only titlebar visible. | |
65 // 2. Freeze for a little bit (0.15->0.6), just showing titlebar. | |
66 // 3. Slowly minimize to thin strip (0.6->1.0) | |
67 const double kProgressAtFreezeStart = 0.15; | |
68 const double kProgressAtFreezeEnd = 0.6; | |
69 double value; | |
70 if (progress <= kProgressAtFreezeStart) { | |
71 value = animation_stop_to_show_titlebar * | |
72 (progress / kProgressAtFreezeStart); | |
73 } else if (progress <= kProgressAtFreezeEnd) { | |
74 value = animation_stop_to_show_titlebar; | |
75 } else { | |
76 value = animation_stop_to_show_titlebar + | |
77 (1.0 - animation_stop_to_show_titlebar) * | |
78 ((progress - kProgressAtFreezeEnd) / (1.0 - kProgressAtFreezeEnd)); | |
79 } | |
80 return value; | |
81 } | |
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