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 #include "ash/wm/overview/window_selector_panels.h"
6
7 #include "ash/screen_ash.h"
8 #include "ash/shell.h"
9 #include "ash/shell_window_ids.h"
10 #include "ash/wm/overview/scoped_transform_overview_window.h"
11 #include "ash/wm/panels/panel_layout_manager.h"
12 #include "ui/aura/client/screen_position_client.h"
13 #include "ui/aura/window.h"
14 #include "ui/compositor/layer.h"
15 #include "ui/compositor/layer_animation_observer.h"
16 #include "ui/compositor/layer_animation_sequence.h"
17 #include "ui/views/widget/widget.h"
18
19 namespace ash {
20
21 namespace {
22
23 const int kPanelCalloutFadeInDurationMilliseconds = 50;
24
25 // This class extends ScopedTransformOverviewMode to hide and show the callout
26 // widget for a panel window when entering / leaving overview mode.
27 class ScopedTransformPanelWindow : public ScopedTransformOverviewWindow {
28 public:
29 ScopedTransformPanelWindow(aura::Window* window);
30 virtual ~ScopedTransformPanelWindow();
31
32 // ScopedTransformOverviewWindow overrides:
33 virtual void PrepareForOverview() OVERRIDE;
34
35 private:
36 // Returns the callout widget for the transformed panel.
37 views::Widget* GetCalloutWidget();
38
39 // Restores the callout visibility.
40 void RestoreCallout();
41
42 // Trigger relayout
43 void Relayout();
44
45 bool callout_visible_;
46
47 DISALLOW_COPY_AND_ASSIGN(ScopedTransformPanelWindow);
48 };
49
ScopedTransformPanelWindow(aura::Window * window)50 ScopedTransformPanelWindow::ScopedTransformPanelWindow(aura::Window* window)
51 : ScopedTransformOverviewWindow(window) {
52 }
53
~ScopedTransformPanelWindow()54 ScopedTransformPanelWindow::~ScopedTransformPanelWindow() {
55 // window() will be NULL if the window was destroyed.
56 if (window())
57 RestoreCallout();
58 }
59
PrepareForOverview()60 void ScopedTransformPanelWindow::PrepareForOverview() {
61 ScopedTransformOverviewWindow::PrepareForOverview();
62 GetCalloutWidget()->GetLayer()->SetOpacity(0.0f);
63 }
64
GetCalloutWidget()65 views::Widget* ScopedTransformPanelWindow::GetCalloutWidget() {
66 DCHECK(window()->parent()->id() == internal::kShellWindowId_PanelContainer);
67 internal::PanelLayoutManager* panel_layout_manager =
68 static_cast<internal::PanelLayoutManager*>(
69 window()->parent()->layout_manager());
70 return panel_layout_manager->GetCalloutWidgetForPanel(window());
71 }
72
RestoreCallout()73 void ScopedTransformPanelWindow::RestoreCallout() {
74 scoped_ptr<ui::LayerAnimationSequence> sequence(
75 new ui::LayerAnimationSequence);
76 ui::LayerAnimationElement::AnimatableProperties paused_properties;
77 paused_properties.insert(ui::LayerAnimationElement::OPACITY);
78 sequence->AddElement(ui::LayerAnimationElement::CreatePauseElement(
79 paused_properties, base::TimeDelta::FromMilliseconds(
80 ScopedTransformOverviewWindow::kTransitionMilliseconds)));
81 sequence->AddElement(ui::LayerAnimationElement::CreateOpacityElement(1,
82 base::TimeDelta::FromMilliseconds(
83 kPanelCalloutFadeInDurationMilliseconds)));
84 GetCalloutWidget()->GetLayer()->GetAnimator()->StartAnimation(
85 sequence.release());
86 }
87
88 } // namespace
89
WindowSelectorPanels()90 WindowSelectorPanels::WindowSelectorPanels() {
91 }
92
~WindowSelectorPanels()93 WindowSelectorPanels::~WindowSelectorPanels() {
94 }
95
AddWindow(aura::Window * window)96 void WindowSelectorPanels::AddWindow(aura::Window* window) {
97 transform_windows_.push_back(new ScopedTransformPanelWindow(window));
98 }
99
GetRootWindow()100 aura::Window* WindowSelectorPanels::GetRootWindow() {
101 return transform_windows_.front()->window()->GetRootWindow();
102 }
103
HasSelectableWindow(const aura::Window * window)104 bool WindowSelectorPanels::HasSelectableWindow(const aura::Window* window) {
105 for (WindowList::const_iterator iter = transform_windows_.begin();
106 iter != transform_windows_.end(); ++iter) {
107 if ((*iter)->window() == window)
108 return true;
109 }
110 return false;
111 }
112
TargetedWindow(const aura::Window * target)113 aura::Window* WindowSelectorPanels::TargetedWindow(const aura::Window* target) {
114 for (WindowList::const_iterator iter = transform_windows_.begin();
115 iter != transform_windows_.end(); ++iter) {
116 if ((*iter)->Contains(target))
117 return (*iter)->window();
118 }
119 return NULL;
120 }
121
RestoreWindowOnExit(aura::Window * window)122 void WindowSelectorPanels::RestoreWindowOnExit(aura::Window* window) {
123 for (WindowList::iterator iter = transform_windows_.begin();
124 iter != transform_windows_.end(); ++iter) {
125 if ((*iter)->Contains(window)) {
126 (*iter)->RestoreWindowOnExit();
127 break;
128 }
129 }
130 }
131
SelectionWindow()132 aura::Window* WindowSelectorPanels::SelectionWindow() {
133 return transform_windows_.front()->window();
134 }
135
RemoveWindow(const aura::Window * window)136 void WindowSelectorPanels::RemoveWindow(const aura::Window* window) {
137 for (WindowList::iterator iter = transform_windows_.begin();
138 iter != transform_windows_.end(); ++iter) {
139 if ((*iter)->window() == window) {
140 (*iter)->OnWindowDestroyed();
141 transform_windows_.erase(iter);
142 break;
143 }
144 }
145 }
146
empty() const147 bool WindowSelectorPanels::empty() const {
148 return transform_windows_.empty();
149 }
150
PrepareForOverview()151 void WindowSelectorPanels::PrepareForOverview() {
152 for (WindowList::iterator iter = transform_windows_.begin();
153 iter != transform_windows_.end(); ++iter) {
154 (*iter)->PrepareForOverview();
155 }
156 }
157
SetItemBounds(aura::Window * root_window,const gfx::Rect & target_bounds,bool animate)158 void WindowSelectorPanels::SetItemBounds(aura::Window* root_window,
159 const gfx::Rect& target_bounds,
160 bool animate) {
161 gfx::Rect bounding_rect;
162 for (WindowList::iterator iter = transform_windows_.begin();
163 iter != transform_windows_.end(); ++iter) {
164 bounding_rect.Union((*iter)->GetBoundsInScreen());
165 }
166 set_bounds(ScopedTransformOverviewWindow::
167 ShrinkRectToFitPreservingAspectRatio(bounding_rect, target_bounds));
168 gfx::Transform bounding_transform =
169 ScopedTransformOverviewWindow::GetTransformForRect(bounding_rect,
170 bounds());
171 for (WindowList::iterator iter = transform_windows_.begin();
172 iter != transform_windows_.end(); ++iter) {
173 gfx::Transform transform;
174 gfx::Rect bounds = (*iter)->GetBoundsInScreen();
175 transform.Translate(bounding_rect.x() - bounds.x(),
176 bounding_rect.y() - bounds.y());
177 transform.PreconcatTransform(bounding_transform);
178 transform.Translate(bounds.x() - bounding_rect.x(),
179 bounds.y() - bounding_rect.y());
180 (*iter)->SetTransform(root_window, transform, animate);
181 }
182 }
183
184 } // namespace ash
185