ash/system/overview/overview_button_tray.cc

   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/session/session_state_delegate.h"
   8 #include "ash/shelf/shelf_types.h"
   9 #include "ash/shell.h"
  10 #include "ash/system/tray/system_tray_delegate.h"
  11 #include "ash/system/tray/tray_utils.h"
  12 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
  13 #include "ash/wm/overview/window_selector_controller.h"
  14 #include "grit/ash_resources.h"
  15 #include "grit/ash_strings.h"
  16 #include "ui/base/l10n/l10n_util.h"
  17 #include "ui/base/resource/resource_bundle.h"
  18 #include "ui/views/border.h"
  19 #include "ui/views/controls/image_view.h"
  20
  21 namespace {
  22
  23 // Predefined padding for the icon used in this tray. These are to be set to the
  24 // border of the icon, depending on the current shelf_alignment()
  25 const int kHorizontalShelfHorizontalPadding = 8;
  26 const int kHorizontalShelfVerticalPadding = 4;
  27 const int kVerticalShelfHorizontalPadding = 2;
  28 const int kVerticalShelfVerticalPadding = 5;
  29
  30 }  // namespace
  31
  32 namespace ash {
  33
  34 OverviewButtonTray::OverviewButtonTray(StatusAreaWidget* status_area_widget)
  35     : TrayBackgroundView(status_area_widget), icon_(NULL) {
  36   SetContentsBackground();
  37
  38   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
  39   icon_ = new views::ImageView();
  40   icon_->SetImage(
  41       bundle.GetImageNamed(IDR_AURA_UBER_TRAY_OVERVIEW_MODE).ToImageSkia());
  42   SetIconBorderForShelfAlignment();
  43   tray_container()->AddChildView(icon_);
  44
  45   Shell::GetInstance()->AddShellObserver(this);
  46   Shell::GetInstance()->session_state_delegate()->AddSessionStateObserver(this);
  47 }
  48
  49 OverviewButtonTray::~OverviewButtonTray() {
  50   Shell::GetInstance()->RemoveShellObserver(this);
  51   Shell::GetInstance()->session_state_delegate()->RemoveSessionStateObserver(
  52       this);
  53 }
  54
  55 void OverviewButtonTray::UpdateAfterLoginStatusChange(
  56     user::LoginStatus status) {
  57   UpdateIconVisibility();
  58 }
  59
  60 bool OverviewButtonTray::PerformAction(const ui::Event& event) {
  61   WindowSelectorController* controller =
  62       Shell::GetInstance()->window_selector_controller();
  63   controller->ToggleOverview();
  64   SetDrawBackgroundAsActive(controller->IsSelecting());
  65   Shell::GetInstance()->metrics()->RecordUserMetricsAction(UMA_TRAY_OVERVIEW);
  66   return true;
  67 }
  68
  69 void OverviewButtonTray::SessionStateChanged(
  70     SessionStateDelegate::SessionState state) {
  71   UpdateIconVisibility();
  72 }
  73
  74 void OverviewButtonTray::OnMaximizeModeStarted() {
  75   UpdateIconVisibility();
  76 }
  77
  78 void OverviewButtonTray::OnMaximizeModeEnded() {
  79   UpdateIconVisibility();
  80 }
  81
  82 void OverviewButtonTray::OnOverviewModeEnded() {
  83   SetDrawBackgroundAsActive(false);
  84 }
  85
  86 bool OverviewButtonTray::ClickedOutsideBubble() {
  87   // This class has no bubbles dismiss, but acknowledge that the message was
  88   // handled.
  89   return true;
  90 }
  91
  92 base::string16 OverviewButtonTray::GetAccessibleNameForTray() {
  93   return l10n_util::GetStringUTF16(IDS_ASH_OVERVIEW_BUTTON_ACCESSIBLE_NAME);
  94 }
  95
  96 void OverviewButtonTray::HideBubbleWithView(
  97     const views::TrayBubbleView* bubble_view) {
  98   // This class has no bubbles to hide.
  99 }
 100
 101 void OverviewButtonTray::SetShelfAlignment(ShelfAlignment alignment) {
 102   if (alignment == shelf_alignment())
 103     return;
 104
 105   TrayBackgroundView::SetShelfAlignment(alignment);
 106   SetIconBorderForShelfAlignment();
 107 }
 108
 109 void OverviewButtonTray::SetIconBorderForShelfAlignment() {
 110   if (shelf_alignment() == SHELF_ALIGNMENT_BOTTOM ||
 111       shelf_alignment() == SHELF_ALIGNMENT_TOP) {
 112     icon_->SetBorder(views::Border::CreateEmptyBorder(
 113         kHorizontalShelfVerticalPadding,
 114         kHorizontalShelfHorizontalPadding,
 115         kHorizontalShelfVerticalPadding,
 116         kHorizontalShelfHorizontalPadding));
 117   } else {
 118     icon_->SetBorder(views::Border::CreateEmptyBorder(
 119         kVerticalShelfVerticalPadding,
 120         kVerticalShelfHorizontalPadding,
 121         kVerticalShelfVerticalPadding,
 122         kVerticalShelfHorizontalPadding));
 123   }
 124 }
 125
 126 void OverviewButtonTray::UpdateIconVisibility() {
 127   // The visibility of the OverviewButtonTray has diverge from
 128   // WindowSelectorController::CanSelect. The visibility of the button should
 129   // not change during transient times in which CanSelect is false. Such as when
 130   // a modal dialog is present.
 131   Shell* shell = Shell::GetInstance();
 132   SessionStateDelegate* session_state_delegate =
 133       shell->session_state_delegate();
 134
 135   SetVisible(
 136       shell->maximize_mode_controller()->IsMaximizeModeWindowManagerEnabled() &&
 137       session_state_delegate->IsActiveUserSessionStarted() &&
 138       !session_state_delegate->IsScreenLocked() &&
 139       session_state_delegate->GetSessionState() ==
 140           SessionStateDelegate::SESSION_STATE_ACTIVE &&
 141       shell->system_tray_delegate()->GetUserLoginStatus() !=
 142           user::LOGGED_IN_KIOSK_APP);
 143 }
 144
 145 }  // namespace ash