add test for large strokes on circles
git-svn-id: http://skia.googlecode.com/svn/trunk@6932 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleRotateCircles.cpp b/samplecode/SampleRotateCircles.cpp
new file mode 100644
index 0000000..739900d
--- /dev/null
+++ b/samplecode/SampleRotateCircles.cpp
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2012 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 "SkView.h"
+#include "SkCanvas.h"
+#include "SkRandom.h"
+
+static void rotateAbout(SkCanvas* canvas, SkScalar degrees,
+ SkScalar cx, SkScalar cy) {
+ canvas->translate(cx, cy);
+ canvas->rotate(degrees);
+ canvas->translate(-cx, -cy);
+}
+
+class RotateCirclesView : public SampleView {
+public:
+ RotateCirclesView() {
+ this->setBGColor(SK_ColorLTGRAY);
+
+ fAngle = 0;
+ }
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt) {
+ if (SampleCode::TitleQ(*evt)) {
+ SampleCode::TitleR(evt, "RotateCircles");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ virtual void onDrawContent(SkCanvas* canvas) {
+ SkRandom rand;
+ SkPaint paint;
+ paint.setAntiAlias(true);
+ paint.setStrokeWidth(20);
+
+ SkScalar cx = 240;
+ SkScalar cy = 240;
+ SkScalar DX = 240 * 2;
+ SkColor color = 0;
+
+ float scale = 1;
+ float sign = 0.3f;
+ for (SkScalar rad = 200; rad >= 20; rad -= 15) {
+ sign = -sign;
+ scale += 0.2f;
+
+ paint.setColor(rand.nextU());
+ paint.setAlpha(0xFF);
+ color = ~color;
+
+ paint.setStyle(SkPaint::kFill_Style);
+
+ canvas->save();
+ rotateAbout(canvas, fAngle * scale * sign, cx, cy);
+ canvas->drawCircle(cx, cy, rad, paint);
+ canvas->restore();
+
+ paint.setStyle(SkPaint::kStroke_Style);
+ paint.setStrokeWidth(rad*2);
+
+ canvas->save();
+ rotateAbout(canvas, fAngle * scale * sign, cx + DX, cy);
+ canvas->drawCircle(cx + DX, cy, 10, paint);
+ canvas->restore();
+
+ }
+
+ fAngle = (fAngle + 1) % 360;
+ this->inval(NULL);
+ }
+
+private:
+ int fAngle;
+ typedef SkView INHERITED;
+};
+
+static SkView* F0() { return new RotateCirclesView; }
+static SkViewRegister gR0(F0);
+