1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_ 6 #define CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_ 7 8 #include "ui/gfx/animation/linear_animation.h" 9 10 namespace autofill { 11 12 // An animation for a dancing ellipsis. 13 class LoadingAnimation : public gfx::LinearAnimation { 14 public: 15 explicit LoadingAnimation(gfx::AnimationDelegate* delegate, 16 int font_height); 17 virtual ~LoadingAnimation(); 18 19 // gfx::Animation implementation. 20 virtual void Step(base::TimeTicks time_now) OVERRIDE; 21 22 // Returns the vertical pixel offset for the nth dot. 23 double GetCurrentValueForDot(size_t dot_i) const; 24 25 // Stops this animation. Use this instead of Stop() to make sure future 26 // runs don't mess up on the first cycle. 27 void Reset(); 28 29 private: 30 // Describes a frame of the animation, a la -webkit-keyframes. 31 struct AnimationFrame { 32 double value; 33 double position; 34 }; 35 36 // True if the current cycle is the first one since Reset() was last called. 37 bool first_cycle_; 38 39 // The font height of the loading text, which gives the factor by which to 40 // scale the animation. 41 const int font_height_; 42 }; 43 44 } // namespace autofill 45 46 #endif // CHROME_BROWSER_UI_AUTOFILL_LOADING_ANIMATION_H_ 47