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:
MegaStrokeView()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
onQuery(SkEvent * evt)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
onDrawBackground(SkCanvas * canvas)46 void onDrawBackground(SkCanvas* canvas) override {
47 }
48
onDrawContent(SkCanvas * canvas)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
onSizeChange()78 void onSizeChange() override {
79 fClip.set(0, 0, 950, 600);
80 }
81
onAnimate(const SkAnimTimer &)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
MyFactory()96 static SkView* MyFactory() { return new MegaStrokeView; }
97 static SkViewRegister reg(MyFactory);
98