1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SampleCode.h" 9 #include "SkCanvas.h" 10 #include "SkPath.h" 11 #include "SkRandom.h" 12 13 class MegaStrokeView : public SampleView { 14 public: 15 MegaStrokeView() { 16 fClip.set(0, 0, 950, 600); 17 fAngle = 0; 18 fPlusMinus = 0; 19 SkRandom rand; 20 fMegaPath.reset(); 21 for (int index = 0; index < 921; ++index) { 22 for (int segs = 0; segs < 40; ++segs) { 23 fMegaPath.lineTo(SkIntToScalar(index), SkIntToScalar(rand.nextRangeU(500, 600))); 24 } 25 } 26 } 27 28 protected: 29 // overrides from SkEventSink 30 bool onQuery(SkEvent* evt) override { 31 if (SampleCode::TitleQ(*evt)) { 32 SampleCode::TitleR(evt, "MegaStroke"); 33 return true; 34 } 35 36 SkUnichar uni; 37 if (SampleCode::CharQ(*evt, &uni)) { 38 fClip.set(0, 0, 950, 600); 39 } 40 if (evt->isType("SampleCode_Key_Event")) { 41 fClip.set(0, 0, 950, 600); 42 } 43 return this->INHERITED::onQuery(evt); 44 } 45 46 void onDrawBackground(SkCanvas* canvas) override { 47 } 48 49 void onDrawContent(SkCanvas* canvas) override { 50 SkPaint paint; 51 paint.setAntiAlias(true); 52 paint.setARGB(255,255,153,0); 53 paint.setStyle(SkPaint::kStroke_Style); 54 paint.setStrokeWidth(1); 55 56 canvas->save(); 57 canvas->clipRect(fClip); 58 canvas->clear(SK_ColorWHITE); 59 canvas->drawPath(fMegaPath, paint); 60 canvas->restore(); 61 62 SkPaint divSimPaint; 63 divSimPaint.setColor(SK_ColorBLUE); 64 SkScalar x = SkScalarSin(fAngle * SK_ScalarPI / 180) * 200 + 250; 65 SkScalar y = SkScalarCos(fAngle * SK_ScalarPI / 180) * 200 + 250; 66 67 if ((fPlusMinus ^= 1)) { 68 fAngle += 5; 69 } else { 70 fAngle -= 5; 71 } 72 SkRect divSim = SkRect::MakeXYWH(x, y, 100, 100); 73 divSim.outset(30, 30); 74 canvas->drawRect(divSim, divSimPaint); 75 fClip = divSim; 76 } 77 78 void onSizeChange() override { 79 fClip.set(0, 0, 950, 600); 80 } 81 82 bool onAnimate(const SkAnimTimer& ) override { 83 return true; 84 } 85 86 private: 87 SkPath fMegaPath; 88 SkRect fClip; 89 int fAngle; 90 int fPlusMinus; 91 typedef SampleView INHERITED; 92 }; 93 94 ////////////////////////////////////////////////////////////////////////////// 95 96 static SkView* MyFactory() { return new MegaStrokeView; } 97 static SkViewRegister reg(MyFactory); 98
