ash/system/overview/overview_button_tray.h

   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 #ifndef ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
   6 #define ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/shell_observer.h"
  10 #include "ash/system/tray/tray_background_view.h"
  11
  12 namespace views {
  13 class ImageView;
  14 }
  15
  16 namespace ash {
  17
  18 // Status area tray for showing a toggle for Overview Mode. Overview Mode
  19 // is equivalent to WindowSelectorController being in selection mode.
  20 // This hosts a ShellObserver that listens for the activation of Maximize Mode
  21 // This tray will only be visible while in this state. This tray does not
  22 // provide any bubble view windows.
  23 class ASH_EXPORT OverviewButtonTray : public TrayBackgroundView,
  24                                       public ShellObserver {
  25  public:
  26   explicit OverviewButtonTray(StatusAreaWidget* status_area_widget);
  27   virtual ~OverviewButtonTray();
  28
  29   // Updates the tray's visibility based on the LoginStatus and the current
  30   // state of MaximizeMode
  31   virtual void UpdateAfterLoginStatusChange(user::LoginStatus status);
  32
  33   // ActionableView:
  34   virtual bool PerformAction(const ui::Event& event) OVERRIDE;
  35
  36   // ShellObserver:
  37   virtual void OnMaximizeModeStarted() OVERRIDE;
  38   virtual void OnMaximizeModeEnded() OVERRIDE;
  39
  40   // TrayBackgroundView:
  41   virtual bool ClickedOutsideBubble() OVERRIDE;
  42   virtual base::string16 GetAccessibleNameForTray() OVERRIDE;
  43   virtual void HideBubbleWithView(
  44       const views::TrayBubbleView* bubble_view) OVERRIDE;
  45   virtual void SetShelfAlignment(ShelfAlignment alignment) OVERRIDE;
  46
  47  private:
  48   friend class OverviewButtonTrayTest;
  49
  50   // Creates a new border for the icon. The padding is determined based on the
  51   // alignment of the shelf.
  52   void SetIconBorderForShelfAlignment();
  53
  54   // Sets the icon to visible if maximize mode is enabled and
  55   // WindowSelectorController::CanSelect.
  56   void UpdateIconVisibility();
  57
  58   // Weak pointer, will be parented by TrayContainer for its lifetime.
  59   views::ImageView* icon_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(OverviewButtonTray);
  62 };
  63
  64 }  // namespace ash
  65
  66 #endif  // ASH_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_