add init() method, so we don't draw in our constructor (makes debugging harder)

git-svn-id: http://skia.googlecode.com/svn/trunk@3368 2bbb7eff-a529-9590-31e7-b0007b416f81

samplecode/SampleMipMap.cpp

@@ -40,8 +40,18 @@ class MipMapView : public SampleView {
     enum {
         N = 64
     };
+    bool fOnce;
 public:
     MipMapView() {
+        fOnce = false;
+    }
+    
+    void init() {
+        if (fOnce) {
+            return;
+        }
+        fOnce = true;
+
         fBitmap = createBitmap(N);
         
         fWidth = N;
@@ -87,6 +97,7 @@ protected:
     }
     
     virtual void onDrawContent(SkCanvas* canvas) {
+        this->init();
         canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
         
         canvas->scale(1.00000001f, 0.9999999f);

samplecode/SamplePageFlip.cpp

@@ -90,6 +90,7 @@ static const SkBitmap::Config gConfigs[] = {
 };
 
 class PageFlipView : public SampleView {
+    bool fOnce;
 public:
     
     enum { N = SK_ARRAY_COUNT(gConfigs) };
@@ -99,25 +100,37 @@ public:
 
 	PageFlipView() {
         gDone = false;
+        fOnce = false;
+        this->setBGColor(0xFFDDDDDD);
+    }
+    
+    void init() {
+        if (fOnce) {
+            return;
+        }
+        fOnce = true;
+
         for (int i = 0; i < N; i++) {
             int             status;
             pthread_attr_t  attr;
             
             status = pthread_attr_init(&attr);
             SkASSERT(0 == status);
-
+            
             fBitmaps[i].setConfig(gConfigs[i], WIDTH, HEIGHT);
             SkFlipPixelRef* pr = new SkFlipPixelRef(gConfigs[i], WIDTH, HEIGHT);
             fBitmaps[i].setPixelRef(pr)->unref();
             fBitmaps[i].eraseColor(0);
-
+            
             status = pthread_create(&fThreads[i], &attr,  draw_proc, &fBitmaps[i]);
             SkASSERT(0 == status);
         }
-        this->setBGColor(0xFFDDDDDD);
     }
     
     virtual ~PageFlipView() {
+        if (!fOnce) {
+            return;
+        }
         gDone = true;
         for (int i = 0; i < N; i++) {
             void* ret;
@@ -137,6 +150,7 @@ protected:
     }
 
     virtual void onDrawContent(SkCanvas* canvas) {
+        this->init();
         SkScalar x = SkIntToScalar(10);
         SkScalar y = SkIntToScalar(10);
         for (int i = 0; i < N; i++) {

samplecode/SampleSlides.cpp

@@ -724,8 +724,18 @@ static const SlideProc gProc[] = {
 
 class SlideView : public SampleView {
     int fIndex;
+    bool fOnce;
 public:
     SlideView() {
+        fOnce = false;
+    }
+    
+    void init() {
+        if (fOnce) {
+            return;
+        }
+        fOnce = true;
+
         fIndex = 0;
         
         SkBitmap bm;
@@ -757,10 +767,12 @@ protected:
     }
     
     virtual void onDrawContent(SkCanvas* canvas) {
+        this->init();
         gProc[fIndex](canvas);
     }
 
     virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
+        this->init();
         fIndex = (fIndex + 1) % SK_ARRAY_COUNT(gProc);
         this->inval(NULL);
         return NULL;

samplecode/SampleXfermodes.cpp

@@ -134,7 +134,18 @@ class XfermodesView : public SampleView {
 public:
     const static int W = 64;
     const static int H = 64;
+    bool fOnce;
+
 	XfermodesView() {
+        fOnce = false;
+    }
+    
+    void init() {
+        if (fOnce) {
+            return;
+        }
+        fOnce = true;
+
         const int W = 64;
         const int H = 64;
 
@@ -156,6 +167,8 @@ protected:
     }
 
     virtual void onDrawContent(SkCanvas* canvas) {
+        this->init();
+
         canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
 
         const struct {