It is time.

ui/views/controls/throbber.h

-// 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.
-
-#ifndef UI_VIEWS_CONTROLS_THROBBER_H_
-#define UI_VIEWS_CONTROLS_THROBBER_H_
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "ui/views/view.h"
-
-namespace gfx {
-class ImageSkia;
-}
-
-namespace views {
-
-// Throbbers display an animation, usually used as a status indicator.
-
-class VIEWS_EXPORT Throbber : public View {
- public:
-  // |frame_time_ms| is the amount of time that should elapse between frames
-  //                 (in milliseconds)
-  // If |paint_while_stopped| is false, this view will be invisible when not
-  // running.
-  Throbber(int frame_time_ms, bool paint_while_stopped);
-  Throbber(int frame_time_ms, bool paint_while_stopped, gfx::ImageSkia* frames);
-  virtual ~Throbber();
-
-  // Start and stop the throbber animation
-  virtual void Start();
-  virtual void Stop();
-
-  // Set custom throbber frames. Otherwise IDR_THROBBER is loaded.
-  void SetFrames(const gfx::ImageSkia* frames);
-
-  // Overridden from View:
-  virtual gfx::Size GetPreferredSize() const override;
-  virtual void OnPaint(gfx::Canvas* canvas) override;
-
- protected:
-  // Specifies whether the throbber is currently animating or not
-  bool running_;
-
- private:
-  void Run();
-
-  bool paint_while_stopped_;
-  int frame_count_;  // How many frames we have.
-  base::Time start_time_;  // Time when Start was called.
-  const gfx::ImageSkia* frames_;  // Frames images.
-  base::TimeDelta frame_time_;  // How long one frame is displayed.
-  base::RepeatingTimer<Throbber> timer_;  // Used to schedule Run calls.
-
-  DISALLOW_COPY_AND_ASSIGN(Throbber);
-};
-
-// A SmoothedThrobber is a throbber that is representing potentially short
-// and nonoverlapping bursts of work.  SmoothedThrobber ignores small
-// pauses in the work stops and starts, and only starts its throbber after
-// a small amount of work time has passed.
-class VIEWS_EXPORT SmoothedThrobber : public Throbber {
- public:
-  explicit SmoothedThrobber(int frame_delay_ms);
-  SmoothedThrobber(int frame_delay_ms, gfx::ImageSkia* frames);
-  virtual ~SmoothedThrobber();
-
-  virtual void Start() override;
-  virtual void Stop() override;
-
-  void set_start_delay_ms(int value) { start_delay_ms_ = value; }
-  void set_stop_delay_ms(int value) { stop_delay_ms_ = value; }
-
- private:
-  // Called when the startup-delay timer fires
-  // This function starts the actual throbbing.
-  void StartDelayOver();
-
-  // Called when the shutdown-delay timer fires.
-  // This function stops the actual throbbing.
-  void StopDelayOver();
-
-  // Delay after work starts before starting throbber, in milliseconds.
-  int start_delay_ms_;
-
-  // Delay after work stops before stopping, in milliseconds.
-  int stop_delay_ms_;
-
-  base::OneShotTimer<SmoothedThrobber> start_timer_;
-  base::OneShotTimer<SmoothedThrobber> stop_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(SmoothedThrobber);
-};
-
-// A CheckmarkThrobber is a special variant of throbber that has three states:
-//   1. not yet completed (which paints nothing)
-//   2. working (which paints the throbber animation)
-//   3. completed (which paints a checkmark)
-//
-class VIEWS_EXPORT CheckmarkThrobber : public Throbber {
- public:
-  CheckmarkThrobber();
-
-  // If checked is true, the throbber stops spinning and displays a checkmark.
-  // If checked is false, the throbber stops spinning and displays nothing.
-  void SetChecked(bool checked);
-
-  // Overridden from Throbber:
-  virtual void OnPaint(gfx::Canvas* canvas) override;
-
- private:
-  static const int kFrameTimeMs = 30;
-
-  // Whether or not we should display a checkmark.
-  bool checked_;
-
-  // The checkmark image.
-  const gfx::ImageSkia* checkmark_;
-
-  DISALLOW_COPY_AND_ASSIGN(CheckmarkThrobber);
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_CONTROLS_THROBBER_H_