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

samplecode/SampleBitmapRect.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 "SkGraphics.h"
 #include "SkImageDecoder.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkShader.h"
 #include "SkUtils.h"
 #include "SkXfermode.h"
@@ skipping 49 matching lines @@
     SkPoint fSrcPts[2];
     SkPoint fSrcVec[2];
     SkRect  fSrcLimit;
     SkRect  fDstR[2];
 
     void bounce() {
         bounce_pt(&fSrcPts[0], &fSrcVec[0], fSrcLimit);
         bounce_pt(&fSrcPts[1], &fSrcVec[1], fSrcLimit);
     }
 
+    void resetBounce() {
+        fSrcPts[0].set(0, 0);
+        fSrcPts[1].set(SCALAR_SIZE, SCALAR_SIZE);
+        
+        fSrcVec[0] = unit_vec(30);
+        fSrcVec[1] = unit_vec(107);
+    }
+
 public:
     BitmapRectView() {
         this->setBGColor(SK_ColorGRAY);
 
-        fSrcPts[0].set(0, 0);
-        fSrcPts[1].set(SCALAR_SIZE, SCALAR_SIZE);
-
-        fSrcVec[0] = unit_vec(30);
-        fSrcVec[1] = unit_vec(107);
+        this->resetBounce();
 
         fSrcLimit.set(-SCALAR_SIZE/4, -SCALAR_SIZE/4,
                       SCALAR_SIZE*5/4, SCALAR_SIZE*5/4);
 
         fDstR[0] = SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(100),
                                        SkIntToScalar(250), SkIntToScalar(300));
         fDstR[1] = fDstR[0];
         fDstR[1].offset(fDstR[0].width() * 5/4, 0);
 
         fSrcPts[0].set(32, 32);
         fSrcPts[1].set(90, 90);
     }
 
 protected:
-    // overrides from SkEventSink
-    virtual bool onQuery(SkEvent* evt) {
+    bool onQuery(SkEvent* evt) SK_OVERRIDE {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "BitmapRect");
             return true;
         }
         return this->INHERITED::onQuery(evt);
     }
 
-    virtual void onDrawContent(SkCanvas* canvas) {
+    void onDrawContent(SkCanvas* canvas) SK_OVERRIDE {
         SkRect srcR;
         srcR.set(fSrcPts[0], fSrcPts[1]);
         srcR = SkRect::MakeXYWH(fSrcPts[0].fX, fSrcPts[0].fY, 32, 32);
         srcR.offset(-srcR.width()/2, -srcR.height()/2);
 
         SkPaint paint;
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setColor(SK_ColorYELLOW);
 
         SkBitmap bitmap;
         make_bitmap(&bitmap);
 
         canvas->translate(20, 20);
 
         canvas->drawBitmap(bitmap, 0, 0, &paint);
         canvas->drawRect(srcR, paint);
 
         for (int i = 0; i < 2; ++i) {
             paint.setFilterLevel(1 == i ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
             canvas->drawBitmapRectToRect(bitmap, &srcR, fDstR[i], &paint);
             canvas->drawRect(fDstR[i], paint);
         }
+    }
 
-        this->bounce();
-        this->inval(NULL);
+    bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE {
+        if (timer.isStopped()) {
+            this->resetBounce();
+        } else if (timer.isRunning()) {
+            this->bounce();
+        }
+        return true;
     }
 
 private:
-    typedef SkView INHERITED;
+    typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static void make_big_bitmap(SkBitmap* bm) {
     static const char gText[] =
         "We the people, in order to form a more perfect union, establish justice,"
         " ensure domestic tranquility, provide for the common defense, promote the"
         " general welfare and ensure the blessings of liberty to ourselves and our"
         " posterity, do ordain and establish this constitution for the United"
@@ skipping 22 matching lines @@
     SkRect  fLimitR;
     SkScalar fDX;
     SkRect  fDstR[2];
 
     void bounceMe() {
         SkScalar width = fSrcR.width();
         bounce(&fSrcR.fLeft, &fDX, fLimitR.fLeft, fLimitR.fRight - width);
         fSrcR.fRight = fSrcR.fLeft + width;
     }
 
+    void resetBounce() {
+        fSrcR.iset(0, 0, fBitmap.height() * 3, fBitmap.height());
+        fDX = SK_Scalar1;
+    }
+
 public:
     BitmapRectView2() {
         make_big_bitmap(&fBitmap);
 
         this->setBGColor(SK_ColorGRAY);
 
-        fSrcR.fLeft = 0;
-        fSrcR.fTop = 0;
-        fSrcR.fRight = SkIntToScalar(fBitmap.height()) * 3;
-        fSrcR.fBottom = SkIntToScalar(fBitmap.height());
+        this->resetBounce();
 
-        fLimitR.set(0, 0,
-                    SkIntToScalar(fBitmap.width()),
-                    SkIntToScalar(fBitmap.height()));
+        fLimitR.iset(0, 0, fBitmap.width(), fBitmap.height());
 
-        fDX = SK_Scalar1;
-
-        fDstR[0] = SkRect::MakeXYWH(SkIntToScalar(20), SkIntToScalar(20),
-                                    SkIntToScalar(600), SkIntToScalar(200));
+        fDstR[0] = SkRect::MakeXYWH(20, 20, 600, 200);
         fDstR[1] = fDstR[0];
         fDstR[1].offset(0, fDstR[0].height() * 5/4);
     }
 
 protected:
-    // overrides from SkEventSink
-    virtual bool onQuery(SkEvent* evt) {
+    bool onQuery(SkEvent* evt) SK_OVERRIDE {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "BigBitmapRect");
             return true;
         }
         return this->INHERITED::onQuery(evt);
     }
 
-    virtual void onDrawContent(SkCanvas* canvas) {
+    void onDrawContent(SkCanvas* canvas) SK_OVERRIDE {
         SkPaint paint;
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setColor(SK_ColorYELLOW);
 
         for (int i = 0; i < 2; ++i) {
             paint.setFilterLevel(1 == i ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
             canvas->drawBitmapRectToRect(fBitmap, &fSrcR, fDstR[i], &paint);
             canvas->drawRect(fDstR[i], paint);
         }
+    }
 
-        this->bounceMe();
-        this->inval(NULL);
+    bool onAnimate(const SkAnimTimer& timer) SK_OVERRIDE {
+        if (timer.isStopped()) {
+            this->resetBounce();
+        } else if (timer.isRunning()) {
+            this->bounceMe();
+        }
+        return true;
     }
 
 private:
-    typedef SkView INHERITED;
+    typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* F0() { return new BitmapRectView; }
 static SkView* F1() { return new BitmapRectView2; }
 static SkViewRegister gR0(F0);
 static SkViewRegister gR1(F1);