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// Copyright (c) 2015 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 UI_GFX_PAINT_THROBBER_H_
#define UI_GFX_PAINT_THROBBER_H_
#include <stdint.h>
#include "base/time/time.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/gfx_export.h"
namespace gfx {
class Canvas;
class Rect;
// This struct describes the "waiting" mode of a throb animation. It's useful
// for building a "spinning" state animation on top of a previous "waiting"
// mode animation. See PaintThrobberSpinningAfterWaiting.
struct GFX_EXPORT ThrobberWaitingState {
// The amount of time that was spent in the waiting state.
base::TimeDelta elapsed_time;
// The color of the arc in the waiting state.
SkColor color;
// An opaque value used to cache calculations made by
// PaintThrobberSpinningAfterWaiting.
base::TimeDelta arc_time_offset;
};
// Paints a single frame of the throbber in the "spinning", aka Material, state.
GFX_EXPORT void PaintThrobberSpinning(Canvas* canvas,
const Rect& bounds, SkColor color, const base::TimeDelta& elapsed_time);
// Paints a throbber in the "waiting" state. Used when waiting on a network
// response, for example.
GFX_EXPORT void PaintThrobberWaiting(Canvas* canvas,
const Rect& bounds, SkColor color, const base::TimeDelta& elapsed_time);
// Paint a throbber in the "spinning" state, smoothly transitioning from a
// previous "waiting" state described by |waiting_state|, which is an in-out
// param.
GFX_EXPORT void PaintThrobberSpinningAfterWaiting(
Canvas* canvas,
const Rect& bounds,
SkColor color,
const base::TimeDelta& elapsed_time,
ThrobberWaitingState* waiting_state);
// Paint a throbber in the "spinning" state, smoothly transitioning from a
// previous "waiting" state described by |final_waiting_frame|.
GFX_EXPORT void PaintThrobberSpinningForFrameAfterWaiting(
Canvas* canvas,
const Rect& bounds,
SkColor color,
uint32_t frame,
SkColor waiting_color,
uint32_t final_waiting_frame);
} // namespace gfx
#endif // UI_GFX_PAINT_THROBBER_H_
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