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:
SpiralView()14 SpiralView() {
15 this->setBGColor(0xFFDDDDDD);
16 }
17
18 protected:
19 // overrides from SkEventSink
onQuery(SkEvent * evt)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
onDrawContent(SkCanvas * canvas)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
MyFactory()62 static SkView* MyFactory() { return new SpiralView; }
63 static SkViewRegister reg(MyFactory);
64