allow GMs to animate

samplecode/SampleCode.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SampleCode_DEFINED
@@ skipping 18 matching lines @@
 
     static bool TitleQ(const SkEvent&);
     static void TitleR(SkEvent*, const char title[]);
     static bool RequestTitle(SkView* view, SkString* title);
 
     static bool PrefSizeQ(const SkEvent&);
     static void PrefSizeR(SkEvent*, SkScalar width, SkScalar height);
 
     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;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 // interface that constructs SkViews
 class SkViewFactory : public SkRefCnt {
 public:
     virtual SkView* operator() () const = 0;
 };
 
@@ skipping 53 matching lines @@
 
 class SampleView : public SkView {
 public:
     SampleView()
         : fPipeState(SkOSMenu::kOffState)
         , fBGColor(SK_ColorWHITE)
         , fRepeatCount(1)
     {}
 
     void setBGColor(SkColor color) { fBGColor = color; }
+    bool animatePulse(SkMSec curr, SkMSec prev) { return this->onAnimatePulse(curr, prev); }
 
     static bool IsSampleView(SkView*);
     static bool SetRepeatDraw(SkView*, int count);
     static bool SetUsePipe(SkView*, SkOSMenu::TriState);
 
     /**
      *  Call this to request menu items from a SampleView.
      *  Subclassing notes: A subclass of SampleView can overwrite this method
      *  to add new items of various types to the menu and change its title.
      *  The events attached to any new menu items must be handled in its onEvent
      *  method. See SkOSMenu.h for helper functions.
      */
     virtual void requestMenu(SkOSMenu* menu) {}
 
     virtual void onTileSizeChanged(const SkSize& tileSize) {}
 
 protected:
     virtual void onDrawBackground(SkCanvas*);
     virtual void onDrawContent(SkCanvas*) = 0;
+    virtual bool onAnimatePulse(SkMSec curr, SkMSec prev) { return false; }
 
     // overrides
     virtual bool onEvent(const SkEvent& evt);
     virtual bool onQuery(SkEvent* evt);
     virtual void draw(SkCanvas*);
     virtual void onDraw(SkCanvas*);
 
     SkOSMenu::TriState fPipeState;
     SkColor fBGColor;
 
 private:
     int fRepeatCount;
 
     typedef SkView INHERITED;
 };
 
 #endif