1// Copyright 2014 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/system/overview/overview_button_tray.h"
6
7#include "ash/shelf/shelf_types.h"
8#include "ash/shell.h"
9#include "ash/system/tray/system_tray_delegate.h"
10#include "ash/system/tray/tray_utils.h"
11#include "ash/wm/maximize_mode/maximize_mode_controller.h"
12#include "ash/wm/overview/window_selector_controller.h"
13#include "grit/ash_resources.h"
14#include "grit/ash_strings.h"
15#include "ui/base/l10n/l10n_util.h"
16#include "ui/base/resource/resource_bundle.h"
17#include "ui/views/border.h"
18#include "ui/views/controls/image_view.h"
19
20namespace {
21
22// Predefined padding for the icon used in this tray. These are to be set to the
23// border of the icon, depending on the current shelf_alignment()
24const int kHorizontalShelfHorizontalPadding = 8;
25const int kHorizontalShelfVerticalPadding = 4;
26const int kVerticalShelfHorizontalPadding = 2;
27const int kVerticalShelfVerticalPadding = 5;
28
29}  // namespace
30
31namespace ash {
32
33OverviewButtonTray::OverviewButtonTray(StatusAreaWidget* status_area_widget)
34    : TrayBackgroundView(status_area_widget), icon_(NULL) {
35  SetContentsBackground();
36
37  ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
38  icon_ = new views::ImageView();
39  icon_->SetImage(
40      bundle.GetImageNamed(IDR_AURA_UBER_TRAY_OVERVIEW_MODE).ToImageSkia());
41  SetIconBorderForShelfAlignment();
42  tray_container()->AddChildView(icon_);
43
44  Shell::GetInstance()->AddShellObserver(this);
45}
46
47OverviewButtonTray::~OverviewButtonTray() {
48  Shell::GetInstance()->RemoveShellObserver(this);
49}
50
51void OverviewButtonTray::UpdateAfterLoginStatusChange(
52    user::LoginStatus status) {
53  UpdateIconVisibility();
54}
55
56bool OverviewButtonTray::PerformAction(const ui::Event& event) {
57  WindowSelectorController* controller =
58      Shell::GetInstance()->window_selector_controller();
59  controller->ToggleOverview();
60  SetDrawBackgroundAsActive(controller->IsSelecting());
61  return true;
62}
63
64void OverviewButtonTray::OnMaximizeModeStarted() {
65  UpdateIconVisibility();
66}
67
68void OverviewButtonTray::OnMaximizeModeEnded() {
69  UpdateIconVisibility();
70}
71
72bool OverviewButtonTray::ClickedOutsideBubble() {
73  // This class has no bubbles dismiss, but acknowledge that the message was
74  // handled.
75  return true;
76}
77
78base::string16 OverviewButtonTray::GetAccessibleNameForTray() {
79  return l10n_util::GetStringUTF16(IDS_ASH_OVERVIEW_BUTTON_ACCESSIBLE_NAME);
80}
81
82void OverviewButtonTray::HideBubbleWithView(
83    const views::TrayBubbleView* bubble_view) {
84  // This class has no bubbles to hide.
85}
86
87void OverviewButtonTray::SetShelfAlignment(ShelfAlignment alignment) {
88  if (alignment == shelf_alignment())
89    return;
90
91  TrayBackgroundView::SetShelfAlignment(alignment);
92  SetIconBorderForShelfAlignment();
93}
94
95void OverviewButtonTray::SetIconBorderForShelfAlignment() {
96  if (shelf_alignment() == SHELF_ALIGNMENT_BOTTOM ||
97      shelf_alignment() == SHELF_ALIGNMENT_TOP) {
98    icon_->SetBorder(views::Border::CreateEmptyBorder(
99        kHorizontalShelfVerticalPadding,
100        kHorizontalShelfHorizontalPadding,
101        kHorizontalShelfVerticalPadding,
102        kHorizontalShelfHorizontalPadding));
103  } else {
104    icon_->SetBorder(views::Border::CreateEmptyBorder(
105        kVerticalShelfVerticalPadding,
106        kVerticalShelfHorizontalPadding,
107        kVerticalShelfVerticalPadding,
108        kVerticalShelfHorizontalPadding));
109  }
110}
111
112void OverviewButtonTray::UpdateIconVisibility() {
113  SetVisible(Shell::GetInstance()->maximize_mode_controller()->
114                 IsMaximizeModeWindowManagerEnabled() &&
115             Shell::GetInstance()->window_selector_controller()->CanSelect());
116}
117
118}  // namespace ash
119