add SkAnimTimer, SPACE = pause/resume, ESP = stop

samplecode/SampleDegenerateTwoPtRadials.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleCode.h"
+#include "SkAnimTimer.h"
 #include "SkView.h"
 #include "SkCanvas.h"
 #include "SkGradientShader.h"
 #include "SkString.h"
 
 static void draw_gradient2(SkCanvas* canvas, const SkRect& rect, SkScalar delta) {
     SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorMAGENTA };
     SkScalar pos[] = { 0, 0.25f, 0.75f, SK_Scalar1 };
 
     SkScalar l = rect.fLeft;
@@ skipping 50 matching lines @@
         SkScalar t = SK_Scalar1 * 100;
         draw_gradient2(canvas, SkRect::MakeXYWH(l, t, w, h), delta);
         SkString txt;
         txt.appendf("gap at \"tangent\" pt = %f", SkScalarToFloat(delta));
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setColor(SK_ColorBLACK);
         canvas->drawText(txt.c_str(), txt.size(), l + w/2 + w*DELTA_SCALE*delta, t + h + SK_Scalar1 * 10, paint);
     }
 
-    bool onAnimatePulse(SkMSec curr, SkMSec prev) SK_OVERRIDE {
-        fTime += (curr - prev) * 0.001f;
+    bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE {
+        fTime = SkDoubleToScalar(timer.secs() / 15);
         return true;
     }
 
 private:
     SkScalar           fTime;
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new DegenerateTwoPtRadialsView; }
 static SkViewRegister reg(MyFactory);