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