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 "DecodeFile.h"
9 #include "SampleCode.h"
10 #include "SkView.h"
11 #include "SkCanvas.h"
12 #include "SkCornerPathEffect.h"
13 #include "SkGradientShader.h"
14 #include "SkGraphics.h"
15 #include "SkPath.h"
16 #include "SkRandom.h"
17 #include "SkRegion.h"
18 #include "SkShader.h"
19 #include "SkUtils.h"
20 #include "SkColorPriv.h"
21 #include "SkColorFilter.h"
22 #include "SkTime.h"
23 #include "SkTypeface.h"
24 #include "SkStream.h"
25 #include "SkColorPriv.h"
26 
27 class LinesView : public SampleView {
28 public:
29     LinesView() {}
30 
31 protected:
32     // overrides from SkEventSink
33     bool onQuery(SkEvent* evt) override {
34         if (SampleCode::TitleQ(*evt)) {
35             SampleCode::TitleR(evt, "Lines");
36             return true;
37         }
38         return this->INHERITED::onQuery(evt);
39     }
40 
41     /*
42      0x1F * x + 0x1F * (32 - x)
43      */
44     void drawRings(SkCanvas* canvas) {
45         canvas->scale(SkIntToScalar(1)/2, SkIntToScalar(1)/2);
46 
47         SkRect  r;
48         SkScalar x = SkIntToScalar(10);
49         SkScalar y = SkIntToScalar(10);
50         r.set(x, y, x + SkIntToScalar(100), y + SkIntToScalar(100));
51 
52         SkPaint paint;
53      //   paint.setAntiAlias(true);
54         paint.setStyle(SkPaint::kStroke_Style);
55         paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3)));
56         paint.setColor(0xFFFF8800);
57      //   paint.setColor(0xFFFFFFFF);
58         canvas->drawRect(r, paint);
59     }
60 
61     void onDrawContent(SkCanvas* canvas) override {
62         SkBitmap bm;
63         decode_file("/kill.gif", &bm);
64         canvas->drawBitmap(bm, 0, 0, nullptr);
65 
66         this->drawRings(canvas);
67         return;
68 
69         SkPaint paint;
70 
71       //  fAlpha = 0x80;
72         paint.setColor(SK_ColorWHITE);
73         paint.setAlpha(fAlpha & 0xFF);
74         SkRect r;
75 
76         SkScalar x = SkIntToScalar(10);
77         SkScalar y = SkIntToScalar(10);
78         r.set(x, y, x + SkIntToScalar(100), y + SkIntToScalar(100));
79         canvas->drawRect(r, paint);
80         return;
81 
82         paint.setColor(0xffffff00);            // yellow
83         paint.setStyle(SkPaint::kStroke_Style);
84         paint.setStrokeWidth(SkIntToScalar(2));
85 
86 //        y += SK_Scalar1/2;
87 
88         canvas->drawLine(x, y, x + SkIntToScalar(90), y + SkIntToScalar(90), paint);
89 
90         paint.setAntiAlias(true);              // with anti-aliasing
91         y += SkIntToScalar(10);
92         canvas->drawLine(x, y, x + SkIntToScalar(90), y + SkIntToScalar(90), paint);
93     }
94 
95     SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override {
96         fAlpha = SkScalarRoundToInt(y);
97         return nullptr;
98     }
99 private:
100 
101     int fAlpha;
102     typedef SampleView INHERITED;
103 };
104 
105 //////////////////////////////////////////////////////////////////////////////
106 
107 static SkView* MyFactory() { return new LinesView; }
108 static SkViewRegister reg(MyFactory);
109