1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/wm/maximize_mode/workspace_backdrop_delegate.h"
#include "ash/wm/window_animations.h"
#include "ash/wm/window_util.h"
#include "base/auto_reset.h"
#include "ui/aura/window.h"
#include "ui/compositor/layer.h"
#include "ui/compositor/scoped_layer_animation_settings.h"
#include "ui/views/background.h"
#include "ui/views/widget/widget.h"
#include "ui/wm/core/window_animations.h"
#include "ui/wm/core/window_util.h"
namespace ash {
namespace {
// The opacity of the backdrop.
const float kBackdropOpacity = 0.5f;
} // namespace
WorkspaceBackdropDelegate::WorkspaceBackdropDelegate(aura::Window* container)
: background_(NULL),
container_(container),
in_restacking_(false) {
background_ = new views::Widget;
views::Widget::InitParams params(
views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
params.parent = container_;
params.bounds = container_->GetBoundsInScreen();
params.layer_type = ui::LAYER_SOLID_COLOR;
// To disallow the MRU list from picking this window up it should not be
// activateable.
params.activatable = views::Widget::InitParams::ACTIVATABLE_NO;
background_->Init(params);
// Do not use the animation system. We don't want the bounds animation and
// opacity needs to get set to |kBackdropOpacity|.
::wm::SetWindowVisibilityAnimationTransition(
background_->GetNativeView(),
::wm::ANIMATE_NONE);
background_->GetNativeView()->SetName("WorkspaceBackdropDelegate");
background_->GetNativeView()->layer()->SetColor(SK_ColorBLACK);
// Make sure that the layer covers visibly everything - including the shelf.
background_->GetNativeView()->layer()->SetBounds(params.bounds);
Show();
RestackBackdrop();
container_->AddObserver(this);
}
WorkspaceBackdropDelegate::~WorkspaceBackdropDelegate() {
container_->RemoveObserver(this);
::wm::ScopedHidingAnimationSettings hiding_settings(
background_->GetNativeView());
background_->Close();
background_->GetNativeView()->layer()->SetOpacity(0.0f);
}
void WorkspaceBackdropDelegate::OnWindowBoundsChanged(
aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) {
// The container size has changed and the layer needs to be adapt to it.
AdjustToContainerBounds();
}
void WorkspaceBackdropDelegate::OnWindowAddedToLayout(aura::Window* child) {
RestackBackdrop();
}
void WorkspaceBackdropDelegate::OnWindowRemovedFromLayout(aura::Window* child) {
RestackBackdrop();
}
void WorkspaceBackdropDelegate::OnChildWindowVisibilityChanged(
aura::Window* child,
bool visible) {
RestackBackdrop();
}
void WorkspaceBackdropDelegate::OnWindowStackingChanged(aura::Window* window) {
RestackBackdrop();
}
void WorkspaceBackdropDelegate::OnPostWindowStateTypeChange(
wm::WindowState* window_state,
wm::WindowStateType old_type) {
RestackBackdrop();
}
void WorkspaceBackdropDelegate::OnDisplayWorkAreaInsetsChanged() {
AdjustToContainerBounds();
}
void WorkspaceBackdropDelegate::RestackBackdrop() {
// Avoid recursive calls.
if (in_restacking_)
return;
aura::Window* window = GetCurrentTopWindow();
if (!window) {
// Hide backdrop since no suitable window was found.
background_->Hide();
return;
}
if (window == background_->GetNativeWindow() &&
background_->IsVisible()) {
return;
}
if (window->GetRootWindow() !=
background_->GetNativeWindow()->GetRootWindow()) {
return;
}
// We are changing the order of windows which will cause recursion.
base::AutoReset<bool> lock(&in_restacking_, true);
if (!background_->IsVisible())
Show();
// Since the backdrop needs to be immediately behind the window and the
// stacking functions only guarantee a "it's above or below", we need
// to re-arrange the two windows twice.
container_->StackChildAbove(background_->GetNativeView(), window);
container_->StackChildAbove(window, background_->GetNativeView());
}
aura::Window* WorkspaceBackdropDelegate::GetCurrentTopWindow() {
const aura::Window::Windows& windows = container_->children();
for (aura::Window::Windows::const_reverse_iterator window_iter =
windows.rbegin();
window_iter != windows.rend(); ++window_iter) {
aura::Window* window = *window_iter;
if (window->TargetVisibility() &&
window->type() == ui::wm::WINDOW_TYPE_NORMAL &&
ash::wm::CanActivateWindow(window))
return window;
}
return NULL;
}
void WorkspaceBackdropDelegate::AdjustToContainerBounds() {
// Cover the entire container window.
gfx::Rect target_rect(gfx::Point(0, 0), container_->bounds().size());
if (target_rect != background_->GetNativeWindow()->bounds()) {
// This needs to be instant.
ui::ScopedLayerAnimationSettings settings(
background_->GetNativeView()->layer()->GetAnimator());
settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds(0));
background_->GetNativeWindow()->SetBounds(target_rect);
if (!background_->IsVisible())
background_->GetNativeView()->layer()->SetOpacity(kBackdropOpacity);
}
}
void WorkspaceBackdropDelegate::Show() {
background_->GetNativeView()->layer()->SetOpacity(0.0f);
background_->Show();
ui::ScopedLayerAnimationSettings settings(
background_->GetNativeView()->layer()->GetAnimator());
background_->GetNativeView()->layer()->SetOpacity(kBackdropOpacity);
}
} // namespace ash
|
