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

samplecode/SampleCamera.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 "SkCamera.h"
 #include "SkEmbossMaskFilter.h"
 #include "SkGradientShader.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkShader.h"
 #include "SkUtils.h"
 #include "SkRandom.h"
@@ skipping 62 matching lines @@
             }
 
             paint.setAntiAlias(true);
             paint.setShader(fShaders[fShaderIndex]);
             paint.setFilterLevel(SkPaint::kLow_FilterLevel);
             SkRect r = { -150, -150, 150, 150 };
             canvas->drawRoundRect(r, 30, 30, paint);
         }
     }
 
-    bool onAnimatePulse(SkMSec curr, SkMSec prev) SK_OVERRIDE {
-        fRY += (curr - prev) * 0.09f;
-        if (fRY >= 360) {
+    bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE {
+        if (timer.isStopped()) {
             fRY = 0;
+        } else {
+            fRY = timer.scaled(90, 360);
         }
         return true;
     }
 
 private:
     SkScalar fRX, fRY, fRZ;
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new CameraView; }
 static SkViewRegister reg(MyFactory);