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// Copyright 2013 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 "ash/ash_export.h"
#include "base/macros.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/image/image_skia.h"
#include "ui/views/controls/button/button.h"
namespace ash {
class Shelf;
class ShelfView;
// Shelf overflow chevron button.
class ASH_EXPORT OverflowButton : public views::Button {
// |shelf_view| is the view containing this button.
OverflowButton(ShelfView* shelf_view, Shelf* shelf);
~OverflowButton() override;
void OnShelfAlignmentChanged();
void OnOverflowBubbleShown();
void OnOverflowBubbleHidden();
// Updates background and schedules a paint.
void UpdateShelfItemBackground(SkColor color);
friend class OverflowButtonTestApi;
enum class ChevronDirection { UP, DOWN, LEFT, RIGHT };
// Returns the direction of chevron image based on the shelf alignment and
// overflow state.
ChevronDirection GetChevronDirection() const;
// Updates the chevron image according to GetChevronDirection().
void UpdateChevronImage();
// views::Button:
std::unique_ptr<views::InkDrop> CreateInkDrop() override;
std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
bool ShouldEnterPushedState(const ui::Event& event) override;
void NotifyClick(const ui::Event& event) override;
std::unique_ptr<views::InkDropMask> CreateInkDropMask() const override;
void PaintButtonContents(gfx::Canvas* canvas) override;
// Helper functions to paint the background and foreground of the button
// at |bounds|.
void PaintBackground(gfx::Canvas* canvas, const gfx::Rect& bounds);
void PaintForeground(gfx::Canvas* canvas, const gfx::Rect& bounds);
// Calculates the bounds of the overflow button based on the shelf alignment
// and overflow shelf visibility.
gfx::Rect CalculateButtonBounds() const;
// The original upward chevron image.
const gfx::ImageSkia upward_image_;
// Cached rotations of |upward_image_|.
gfx::ImageSkia downward_image_;
gfx::ImageSkia leftward_image_;
gfx::ImageSkia rightward_image_;
// Current chevron image which is a pointer to one of the above images
// according to current shelf alignment and overflow shelf visibility.
const gfx::ImageSkia* chevron_image_;
ShelfView* shelf_view_;
Shelf* shelf_;
// Color used to paint the background.
SkColor background_color_;
} // namespace ash