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// Copyright (c) 2012 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.
#include <memory>
#include "ash/ash_export.h"
#include "ash/public/cpp/shelf_types.h"
#include "ash/session/session_observer.h"
#include "ash/shelf/shelf_background_animator.h"
#include "ash/shelf/shelf_background_animator_observer.h"
#include "ash/shelf/shelf_layout_manager_observer.h"
#include "base/macros.h"
#include "ui/views/widget/widget.h"
#include "ui/views/widget/widget_observer.h"
namespace app_list {
class ApplicationDragAndDropHost;
namespace ash {
enum class AnimationChangeType;
class AppListButton;
class FocusCycler;
class LoginShelfView;
class Shelf;
class ShelfLayoutManager;
class ShelfView;
class StatusAreaWidget;
// The ShelfWidget manages the shelf view (which contains the shelf icons) and
// the status area widget. There is one ShelfWidget per display. It is created
// early during RootWindowController initialization.
class ASH_EXPORT ShelfWidget : public views::Widget,
public views::WidgetObserver,
public ShelfBackgroundAnimatorObserver,
public ShelfLayoutManagerObserver,
public SessionObserver {
ShelfWidget(aura::Window* shelf_container, Shelf* shelf);
~ShelfWidget() override;
// Returns true if the views-based login shelf is being shown.
static bool IsUsingMdLoginShelf();
void CreateStatusAreaWidget(aura::Window* status_container);
void OnShelfAlignmentChanged();
// Sets the shelf's background type.
void SetPaintsBackground(ShelfBackgroundType background_type,
AnimationChangeType change_type);
ShelfBackgroundType GetBackgroundType() const;
// Gets the alpha value of |background_type|.
int GetBackgroundAlphaValue(ShelfBackgroundType background_type) const;
ShelfLayoutManager* shelf_layout_manager() { return shelf_layout_manager_; }
StatusAreaWidget* status_area_widget() const { return status_area_widget_; }
void PostCreateShelf();
bool IsShowingAppList() const;
bool IsShowingContextMenu() const;
bool IsShowingOverflowBubble() const;
// Sets the focus cycler. Also adds the shelf to the cycle.
void SetFocusCycler(FocusCycler* focus_cycler);
FocusCycler* GetFocusCycler();
// Clean up prior to deletion.
void Shutdown();
// See Shelf::UpdateIconPositionForPanel().
void UpdateIconPositionForPanel(aura::Window* panel);
// See Shelf::GetScreenBoundsOfItemIconForWindow().
gfx::Rect GetScreenBoundsOfItemIconForWindow(aura::Window* window);
// Returns the button that opens the app launcher.
AppListButton* GetAppListButton() const;
// Returns the ApplicationDragAndDropHost for this shelf.
app_list::ApplicationDragAndDropHost* GetDragAndDropHostForAppList();
void set_default_last_focusable_child(bool default_last_focusable_child);
// Overridden from views::WidgetObserver:
void OnWidgetActivationChanged(views::Widget* widget, bool active) override;
// ShelfBackgroundAnimatorObserver overrides:
void UpdateShelfItemBackground(SkColor color) override;
// ShelfLayoutManagerObserver overrides:
void WillDeleteShelfLayoutManager() override;
// SessionObserver overrides:
void OnSessionStateChanged(session_manager::SessionState state) override;
// Internal implementation detail. Do not expose outside of tests.
ShelfView* shelf_view_for_testing() const { return shelf_view_; }
// Internal implementation detail. Do not expose outside of tests.
LoginShelfView* login_shelf_view_for_testing() const {
return login_shelf_view_;
class DelegateView;
friend class DelegateView;
Shelf* shelf_;
// Owned by the shelf container's window.
ShelfLayoutManager* shelf_layout_manager_;
// Owned by the native widget.
StatusAreaWidget* status_area_widget_;
// |delegate_view_| is the contents view of this widget and is cleaned up
// during CloseChildWindows of the associated RootWindowController.
DelegateView* delegate_view_;
// View containing the shelf items within an active user session. Owned by
// the views hierarchy.
ShelfView* const shelf_view_;
// View containing the shelf items for Login/Lock/OOBE/Add User screens.
// Owned by the views hierarchy.
LoginShelfView* const login_shelf_view_;
ShelfBackgroundAnimator background_animator_;
ScopedSessionObserver scoped_session_observer_;
} // namespace ash