Use animated vector icon for app menu notification animation.

chrome/browser/ui/toolbar/app_menu_animation.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_TOOLBAR_APP_MENU_ANIMATION_H_
-#define CHROME_BROWSER_UI_TOOLBAR_APP_MENU_ANIMATION_H_
-
-#include "base/time/time.h"
-#include "third_party/skia/include/core/SkColor.h"
-#include "ui/gfx/animation/animation_delegate.h"
-#include "ui/gfx/animation/slide_animation.h"
-
-namespace gfx {
-class Canvas;
-class PointF;
-}  // namespace gfx
-
-// Delegate class for AppMenuAnimation. The delegate is expected to
-// handle animation events and invalidate the platform's view.
-class AppMenuAnimationDelegate {
- public:
-  // Called when the animation has started/ended.
-  virtual void AppMenuAnimationStarted() = 0;
-  virtual void AppMenuAnimationEnded() = 0;
-
-  // Schedules a redraw of the icon.
-  virtual void InvalidateIcon() = 0;
-};
-
-// This class is used for animating and drawing the app menu icon.
-class AppMenuAnimation : public gfx::AnimationDelegate {
- public:
-  AppMenuAnimation(AppMenuAnimationDelegate* owner, SkColor initial_color);
-
-  ~AppMenuAnimation() override;
-
-  // Paints the app menu icon.
-  void PaintAppMenu(gfx::Canvas* canvas, const gfx::Rect& bounds);
-
-  // Starts the animation if it's not already running.
-  void StartAnimation();
-
-  // gfx::AnimationDelegate:
-  void AnimationEnded(const gfx::Animation* animation) override;
-  void AnimationProgressed(const gfx::Animation* animation) override;
-
-  void set_target_color(SkColor target_color) { target_color_ = target_color; }
-
- private:
-  // This class is used to represent and paint a dot on the app menu.
-  class AppMenuDot {
-   public:
-    AppMenuDot(base::TimeDelta delay,
-               float width_open_interval,
-               float stroke_open_interval);
-
-    // Paints the dot on the given |canvas| according to the progress of
-    // |animation|. The size of the dot is calculated to fit in |bounds|.
-    // |center_point| is the dot's position on the canvas. The dot's color is
-    // a transition from |start_color| to |final_color|.
-    void Paint(const gfx::PointF& center_point,
-               SkColor start_color,
-               SkColor final_color,
-               gfx::Canvas* canvas,
-               const gfx::Rect& bounds,
-               const gfx::SlideAnimation* animation,
-               AppMenuAnimationDelegate* delegate);
-
-   private:
-    // The delay before the dot starts animating in ms.
-    const base::TimeDelta delay_;
-
-    // The percentage of the overall animation duration it takes to animate the
-    // width and stroke to their open state.
-    const float width_open_interval_;
-    const float stroke_open_interval_;
-
-    DISALLOW_COPY_AND_ASSIGN(AppMenuDot);
-  };
-
-  AppMenuAnimationDelegate* const delegate_;
-
-  std::unique_ptr<gfx::SlideAnimation> animation_;
-
-  AppMenuDot bottom_dot_;
-  AppMenuDot middle_dot_;
-  AppMenuDot top_dot_;
-
-  // The starting color of the dots. The animation is expected to transition
-  // from this color to |target_color_|.
-  SkColor start_color_;
-
-  // The severity color of the dots. This is final color at the end of the
-  // animation.
-  SkColor target_color_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppMenuAnimation);
-};
-
-#endif  // CHROME_BROWSER_UI_TOOLBAR_APP_MENU_ANIMATION_H_