blob: f365100ca951c971652c721a530b0d0d64886075 [file] [log] [blame]
// Copyright 2017 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/shelf_button_delegate.h"
#include "ash/shelf/shelf_control_button.h"
#include "ash/system/model/virtual_keyboard_model.h"
#include "base/macros.h"
namespace ash {
class ShelfButtonDelegate;
// The back button shown on the shelf when tablet mode is enabled. Its opacity
// and visiblity are handled by its parent, ShelfView, to ensure the fade
// in/out of the icon matches the movement of ShelfView's items.
class ASH_EXPORT BackButton : public ShelfControlButton,
public ShelfButtonDelegate,
public VirtualKeyboardModel::Observer {
static const char kViewClassName[];
explicit BackButton(Shelf* shelf);
~BackButton() override;
// views::Button:
void PaintButtonContents(gfx::Canvas* canvas) override;
const char* GetClassName() const override;
base::string16 GetTooltipText(const gfx::Point& p) const override;
// ShelfButtonDelegate:
void OnShelfButtonAboutToRequestFocusFromTabTraversal(ShelfButton* button,
bool reverse) override;
// VirtualKeyboardModel::Observer:
void OnVirtualKeyboardVisibilityChanged() override;
void ButtonPressed(views::Button* sender,
const ui::Event& event,
views::InkDrop* ink_drop) override;
} // namespace ash