allow for stepping through a picture with 'n' and 'p'

samplecode/SampleApp.h

 /*
  * Copyright 2011 Skia
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SampleApp_DEFINED
 #define SampleApp_DEFINED
 
@@ skipping 156 matching lines @@
     SkPath fClipPath;
 
     SkTouchGesture fGesture;
     SkScalar fZoomLevel;
     SkScalar fZoomScale;
 
     DeviceType fDeviceType;
     DeviceManager* fDevManager;
 
     bool fSaveToPdf;
+    bool fSaveToSKP;
     SkAutoTUnref<SkDocument> fPDFDocument;
 
     bool fUseClip;
     bool fAnimating;
     bool fRotate;
     bool fPerspAnim;
     bool fRequestGrabImage;
     bool fMeasureFPS;
     SkMSec fMeasureFPS_Time;
     SkMSec fMeasureFPS_StartTime;
@@ skipping 24 matching lines @@
     int fMSAASampleCount;
 
     int fScrollTestX, fScrollTestY;
     SkScalar fZoomCenterX, fZoomCenterY;
 
     //Stores global settings
     SkOSMenu* fAppMenu; // We pass ownership to SkWindow, when we call addMenu
     //Stores slide specific settings
     SkOSMenu* fSlideMenu; // We pass ownership to SkWindow, when we call addMenu
 
-    int fTransitionNext;
-    int fTransitionPrev;
-
     void loadView(SkView*);
     void updateTitle();
     bool getRawTitle(SkString*);
 
     bool zoomIn();
     bool zoomOut();
     void updatePointer(int x, int y);
     void magnify(SkCanvas* canvas);
     void showZoomer(SkCanvas* canvas);
     void updateMatrix();
     void postAnimatingEvent();
     int findByTitle(const char*);
     void listTitles();
     SkSize tileSize() const;
     bool sendAnimatePulse();
 
     typedef SkOSWindow INHERITED;
 };
 
 #endif