src/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/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
  20 namespace {
  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()
  24 const int kHorizontalShelfHorizontalPadding = 8;
  25 const int kHorizontalShelfVerticalPadding = 4;
  26 const int kVerticalShelfHorizontalPadding = 2;
  27 const int kVerticalShelfVerticalPadding = 5;
  28
  29 }  // namespace
  30
  31 namespace ash {
  32
  33 OverviewButtonTray::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
  47 OverviewButtonTray::~OverviewButtonTray() {
  48   Shell::GetInstance()->RemoveShellObserver(this);
  49 }
  50
  51 void OverviewButtonTray::UpdateAfterLoginStatusChange(
  52     user::LoginStatus status) {
  53   UpdateIconVisibility();
  54 }
  55
  56 bool 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
  64 void OverviewButtonTray::OnMaximizeModeStarted() {
  65   UpdateIconVisibility();
  66 }
  67
  68 void OverviewButtonTray::OnMaximizeModeEnded() {
  69   UpdateIconVisibility();
  70 }
  71
  72 bool OverviewButtonTray::ClickedOutsideBubble() {
  73   // This class has no bubbles dismiss, but acknowledge that the message was
  74   // handled.
  75   return true;
  76 }
  77
  78 base::string16 OverviewButtonTray::GetAccessibleNameForTray() {
  79   return l10n_util::GetStringUTF16(IDS_ASH_OVERVIEW_BUTTON_ACCESSIBLE_NAME);
  80 }
  81
  82 void OverviewButtonTray::HideBubbleWithView(
  83     const views::TrayBubbleView* bubble_view) {
  84   // This class has no bubbles to hide.
  85 }
  86
  87 void OverviewButtonTray::SetShelfAlignment(ShelfAlignment alignment) {
  88   if (alignment == shelf_alignment())
  89     return;
  90
  91   TrayBackgroundView::SetShelfAlignment(alignment);
  92   SetIconBorderForShelfAlignment();
  93 }
  94
  95 void 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
 112 void OverviewButtonTray::UpdateIconVisibility() {
 113   SetVisible(Shell::GetInstance()->maximize_mode_controller()->
 114                  IsMaximizeModeWindowManagerEnabled() &&
 115              Shell::GetInstance()->window_selector_controller()->CanSelect());
 116 }
 117
 118 }  // namespace ash