1 2 /* 3 * Copyright 2011 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 #include "SampleCode.h" 9 #include "SkView.h" 10 #include "SkCanvas.h" 11 12 class SpiralView : public SampleView { 13 public: 14 SpiralView() { 15 this->setBGColor(0xFFDDDDDD); 16 } 17 18 protected: 19 // overrides from SkEventSink 20 virtual bool onQuery(SkEvent* evt) { 21 if (SampleCode::TitleQ(*evt)) { 22 SampleCode::TitleR(evt, "Spiral"); 23 return true; 24 } 25 return this->INHERITED::onQuery(evt); 26 } 27 28 virtual void onDrawContent(SkCanvas* canvas) { 29 SkPaint paint; 30 paint.setAntiAlias(true); 31 paint.setStyle(SkPaint::kStroke_Style); 32 paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3))); 33 paint.setStyle(SkPaint::kFill_Style); 34 35 SkRect r; 36 SkScalar l,t,x,y; 37 l = SampleCode::GetAnimScalar(SkIntToScalar(10), 38 SkIntToScalar(400)); 39 t = SampleCode::GetAnimScalar(SkIntToScalar(5), 40 SkIntToScalar(200)); 41 42 canvas->translate(320,240); 43 for (int i = 0; i < 35; i++) { 44 paint.setColor(0xFFF00FF0 - i * 0x04000000); 45 SkScalar step = SK_ScalarPI / (55 - i); 46 SkScalar angle = t * step; 47 x = (20 + SkIntToScalar(i) * 5) * SkScalarSinCos(angle, &y); 48 y *= (20 + SkIntToScalar(i) * 5); 49 r.set(x, y, x + SkIntToScalar(10), y + SkIntToScalar(10)); 50 canvas->drawRect(r, paint); 51 } 52 53 this->inval(NULL); 54 } 55 56 private: 57 typedef SampleView INHERITED; 58 }; 59 60 ////////////////////////////////////////////////////////////////////////////// 61 62 static SkView* MyFactory() { return new SpiralView; } 63 static SkViewRegister reg(MyFactory); 64
