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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef ASH_COMMON_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
#define ASH_COMMON_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_
#include "ash/ash_export.h"
#include "ash/common/session/session_state_observer.h"
#include "ash/common/shell_observer.h"
#include "ash/common/system/tray/tray_background_view.h"
#include "base/macros.h"
namespace views {
class ImageView;
}
namespace ash {
// Status area tray for showing a toggle for Overview Mode. Overview Mode
// is equivalent to WindowSelectorController being in selection mode.
// This hosts a ShellObserver that listens for the activation of Maximize Mode
// This tray will only be visible while in this state. This tray does not
// provide any bubble view windows.
class ASH_EXPORT OverviewButtonTray : public TrayBackgroundView,
public SessionStateObserver,
public ShellObserver {
public:
explicit OverviewButtonTray(WmShelf* wm_shelf);
~OverviewButtonTray() override;
// Updates the tray's visibility based on the LoginStatus and the current
// state of MaximizeMode
virtual void UpdateAfterLoginStatusChange(LoginStatus status);
// ActionableView:
bool PerformAction(const ui::Event& event) override;
// SessionStateObserver:
void SessionStateChanged(session_manager::SessionState state) override;
// ShellObserver:
void OnMaximizeModeStarted() override;
void OnMaximizeModeEnded() override;
void OnOverviewModeStarting() override;
void OnOverviewModeEnded() override;
// TrayBackgroundView:
void ClickedOutsideBubble() override;
base::string16 GetAccessibleNameForTray() override;
void HideBubbleWithView(const views::TrayBubbleView* bubble_view) override;
void SetShelfAlignment(ShelfAlignment alignment) override;
private:
friend class OverviewButtonTrayTest;
// Creates a new border for the icon. The padding is determined based on the
// alignment of the shelf.
void SetIconBorderForShelfAlignment();
// Sets the icon to visible if maximize mode is enabled and
// WindowSelectorController::CanSelect.
void UpdateIconVisibility();
// Weak pointer, will be parented by TrayContainer for its lifetime.
views::ImageView* icon_;
DISALLOW_COPY_AND_ASSIGN(OverviewButtonTray);
};
} // namespace ash
#endif // ASH_COMMON_SYSTEM_OVERVIEW_OVERVIEW_BUTTON_TRAY_H_