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
12class SpiralView : public SampleView {
13public:
14    SpiralView() {
15        this->setBGColor(0xFFDDDDDD);
16    }
17
18protected:
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
56private:
57    typedef SampleView INHERITED;
58};
59
60//////////////////////////////////////////////////////////////////////////////
61
62static SkView* MyFactory() { return new SpiralView; }
63static SkViewRegister reg(MyFactory);
64