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
12namespace views {
13class ImageView;
14}
15
16namespace 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.
23class 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_
67