1 /* 2 * Copyright 2011 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 "SkAnimTimer.h" 10 #include "SkView.h" 11 #include "SkCanvas.h" 12 #include "SkDrawable.h" 13 #include "SkGradientShader.h" 14 #include "SkPath.h" 15 #include "SkRegion.h" 16 #include "SkShader.h" 17 #include "SkUtils.h" 18 #include "Sk1DPathEffect.h" 19 #include "SkCornerPathEffect.h" 20 #include "SkPathMeasure.h" 21 #include "SkPictureRecorder.h" 22 #include "SkRandom.h" 23 #include "SkColorPriv.h" 24 #include "SkColorFilter.h" 25 #include "SkLayerRasterizer.h" 26 27 #include "SkParsePath.h" 28 static void testparse() { 29 SkRect r; 30 r.set(0, 0, 10, 10.5f); 31 SkPath p, p2; 32 SkString str, str2; 33 34 p.addRect(r); 35 SkParsePath::ToSVGString(p, &str); 36 SkParsePath::FromSVGString(str.c_str(), &p2); 37 SkParsePath::ToSVGString(p2, &str2); 38 } 39 40 class ArcsView : public SampleView { 41 class MyDrawable : public SkDrawable { 42 SkRect fR; 43 SkScalar fSweep; 44 public: 45 MyDrawable(const SkRect& r) : fR(r), fSweep(0) {} 46 47 void setSweep(SkScalar sweep) { 48 if (fSweep != sweep) { 49 fSweep = sweep; 50 this->notifyDrawingChanged(); 51 } 52 } 53 54 void onDraw(SkCanvas* canvas) override { 55 SkPaint paint; 56 paint.setAntiAlias(true); 57 paint.setStrokeWidth(SkIntToScalar(2)); 58 59 paint.setStyle(SkPaint::kFill_Style); 60 paint.setColor(0x800000FF); 61 canvas->drawArc(fR, 0, fSweep, true, paint); 62 63 paint.setColor(0x800FF000); 64 canvas->drawArc(fR, 0, fSweep, false, paint); 65 66 paint.setStyle(SkPaint::kStroke_Style); 67 paint.setColor(SK_ColorRED); 68 canvas->drawArc(fR, 0, fSweep, true, paint); 69 70 paint.setStrokeWidth(0); 71 paint.setColor(SK_ColorBLUE); 72 canvas->drawArc(fR, 0, fSweep, false, paint); 73 } 74 75 SkRect onGetBounds() override { 76 SkRect r(fR); 77 r.outset(2, 2); 78 return r; 79 } 80 }; 81 82 public: 83 SkRect fRect; 84 MyDrawable* fAnimatingDrawable; 85 SkDrawable* fRootDrawable; 86 87 ArcsView() { 88 testparse(); 89 fSweep = SkIntToScalar(100); 90 this->setBGColor(0xFFDDDDDD); 91 92 fRect.set(0, 0, SkIntToScalar(200), SkIntToScalar(200)); 93 fRect.offset(SkIntToScalar(20), SkIntToScalar(20)); 94 fAnimatingDrawable = new MyDrawable(fRect); 95 96 SkPictureRecorder recorder; 97 this->drawRoot(recorder.beginRecording(SkRect::MakeWH(800, 500))); 98 fRootDrawable = recorder.endRecordingAsDrawable(); 99 } 100 101 ~ArcsView() override { 102 fAnimatingDrawable->unref(); 103 fRootDrawable->unref(); 104 } 105 106 protected: 107 // overrides from SkEventSink 108 bool onQuery(SkEvent* evt) override { 109 if (SampleCode::TitleQ(*evt)) { 110 SampleCode::TitleR(evt, "Arcs"); 111 return true; 112 } 113 return this->INHERITED::onQuery(evt); 114 } 115 116 static void DrawRectWithLines(SkCanvas* canvas, const SkRect& r, const SkPaint& p) { 117 canvas->drawRect(r, p); 118 canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p); 119 canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p); 120 canvas->drawLine(r.fLeft, r.centerY(), r.fRight, r.centerY(), p); 121 canvas->drawLine(r.centerX(), r.fTop, r.centerX(), r.fBottom, p); 122 } 123 124 static void DrawLabel(SkCanvas* canvas, const SkRect& rect, SkScalar start, SkScalar sweep) { 125 SkPaint paint; 126 127 paint.setAntiAlias(true); 128 paint.setTextAlign(SkPaint::kCenter_Align); 129 130 SkString str; 131 132 str.appendScalar(start); 133 str.append(", "); 134 str.appendScalar(sweep); 135 canvas->drawText(str.c_str(), str.size(), rect.centerX(), 136 rect.fBottom + paint.getTextSize() * 5/4, paint); 137 } 138 139 static void DrawArcs(SkCanvas* canvas) { 140 SkPaint paint; 141 SkRect r; 142 SkScalar w = 75; 143 SkScalar h = 50; 144 145 r.set(0, 0, w, h); 146 paint.setAntiAlias(true); 147 paint.setStyle(SkPaint::kStroke_Style); 148 149 canvas->save(); 150 canvas->translate(SkIntToScalar(10), SkIntToScalar(300)); 151 152 paint.setStrokeWidth(SkIntToScalar(1)); 153 154 static const SkScalar gAngles[] = { 155 0, 360, 156 0, 45, 157 0, -45, 158 720, 135, 159 -90, 269, 160 -90, 270, 161 -90, 271, 162 -180, -270, 163 225, 90 164 }; 165 166 for (size_t i = 0; i < SK_ARRAY_COUNT(gAngles); i += 2) { 167 paint.setColor(SK_ColorBLACK); 168 DrawRectWithLines(canvas, r, paint); 169 170 paint.setColor(SK_ColorRED); 171 canvas->drawArc(r, gAngles[i], gAngles[i+1], false, paint); 172 173 DrawLabel(canvas, r, gAngles[i], gAngles[i+1]); 174 175 canvas->translate(w * 8 / 7, 0); 176 } 177 178 canvas->restore(); 179 } 180 181 void drawRoot(SkCanvas* canvas) { 182 SkPaint paint; 183 paint.setAntiAlias(true); 184 paint.setStrokeWidth(SkIntToScalar(2)); 185 paint.setStyle(SkPaint::kStroke_Style); 186 187 DrawRectWithLines(canvas, fRect, paint); 188 189 canvas->drawDrawable(fAnimatingDrawable); 190 191 DrawArcs(canvas); 192 } 193 194 void onDrawContent(SkCanvas* canvas) override { 195 canvas->drawDrawable(fRootDrawable); 196 } 197 198 bool onAnimate(const SkAnimTimer& timer) override { 199 SkScalar angle = SkDoubleToScalar(fmod(timer.secs() * 360 / 24, 360)); 200 fAnimatingDrawable->setSweep(angle); 201 return true; 202 } 203 204 SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override { 205 // fSweep += SK_Scalar1; 206 this->inval(nullptr); 207 return this->INHERITED::onFindClickHandler(x, y, modi); 208 } 209 210 private: 211 SkScalar fSweep; 212 213 typedef SampleView INHERITED; 214 }; 215 216 ////////////////////////////////////////////////////////////////////////////// 217 218 static SkView* MyFactory() { return new ArcsView; } 219 static SkViewRegister reg(MyFactory); 220
