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

samplecode/SampleCode.h

Index: samplecode/SampleCode.h
diff --git a/samplecode/SampleCode.h b/samplecode/SampleCode.h
index 02590f17a90d1a9e4b985e298131604c799935c4..e65919a765dc2fa3ab44ed37796aef040b3145c5 100644
--- a/samplecode/SampleCode.h
+++ b/samplecode/SampleCode.h
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
@@ -6,7 +5,6 @@
  * found in the LICENSE file.
  */
 
-
 #ifndef SampleCode_DEFINED
 #define SampleCode_DEFINED
 
@@ -15,7 +13,9 @@
 #include "SkKey.h"
 #include "SkView.h"
 #include "SkOSMenu.h"
+
 class GrContext;
+class SkAnimTimer;
 
 #define DEF_SAMPLE(code) \
     static SkView*          SK_MACRO_APPEND_LINE(F_)() { code } \
@@ -36,16 +36,6 @@ public:
 
     static bool FastTextQ(const SkEvent&);
 
-private:
-    static SkMSec GetAnimTime();
-    static SkMSec GetAnimTimeDelta();
-    static SkScalar GetAnimSecondsDelta();
-    static SkScalar GetAnimScalar(SkScalar speedPerSec, SkScalar period = 0);
-    // gives a sinusoidal value between 0 and amplitude
-    static SkScalar GetAnimSinScalar(SkScalar amplitude,
-                                     SkScalar periodInSec,
-                                     SkScalar phaseInSec = 0);
-
     friend class SampleWindow;
 };
 
@@ -120,7 +110,7 @@ public:
     {}
 
     void setBGColor(SkColor color) { fBGColor = color; }
-    bool animatePulse(SkMSec curr, SkMSec prev) { return this->onAnimatePulse(curr, prev); }
+    bool animate(const SkAnimTimer& timer) { return this->onAnimate(timer); }
 
     static bool IsSampleView(SkView*);
     static bool SetRepeatDraw(SkView*, int count);
@@ -140,7 +130,7 @@ public:
 protected:
     virtual void onDrawBackground(SkCanvas*);
     virtual void onDrawContent(SkCanvas*) = 0;
-    virtual bool onAnimatePulse(SkMSec curr, SkMSec prev) { return false; }
+    virtual bool onAnimate(const SkAnimTimer&) { return false; }
 
     // overrides
     virtual bool onEvent(const SkEvent& evt);