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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.
#include <memory>
#include "ash/ash_export.h"
#include "ash/shelf/app_list_button_controller.h"
#include "ash/shelf/shelf_control_button.h"
#include "base/macros.h"
namespace ash {
class Shelf;
class ShelfView;
// Button used for the AppList icon on the shelf. It opens the app list (in
// clamshell mode) or home screen (in tablet mode). Because the clamshell-mode
// app list appears like a dismissable overlay, the button is highlighted while
// the app list is open in clamshell mode.
// If Assistant is enabled, the button is filled in; long-pressing it will
// launch Assistant.
class ASH_EXPORT AppListButton : public ShelfControlButton {
static const char kViewClassName[];
AppListButton(ShelfView* shelf_view, Shelf* shelf);
~AppListButton() override;
// views::Button:
void OnGestureEvent(ui::GestureEvent* event) override;
const char* GetClassName() const override;
// Called when the availability of a long-press gesture may have changed, e.g.
// when Assistant becomes enabled.
void OnVoiceInteractionAvailabilityChanged();
// True if the app list is shown for the display containing this button.
bool IsShowingAppList() const;
// views::Button:
void PaintButtonContents(gfx::Canvas* canvas) override;
// The controller used to determine the button's behavior.
AppListButtonController controller_;
} // namespace ash