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      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 "SkView.h"
     10 #include "SkCanvas.h"
     11 #include "SkCornerPathEffect.h"
     12 #include "SkGradientShader.h"
     13 #include "SkGraphics.h"
     14 #include "SkImageDecoder.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 "SkXfermode.h"
     25 
     26 #include "SkStream.h"
     27 #include "SkXMLParser.h"
     28 #include "SkColorPriv.h"
     29 #include "SkImageDecoder.h"
     30 
     31 class LinesView : public SampleView {
     32 public:
     33     LinesView() {}
     34 
     35 protected:
     36     // overrides from SkEventSink
     37     virtual bool onQuery(SkEvent* evt) {
     38         if (SampleCode::TitleQ(*evt)) {
     39             SampleCode::TitleR(evt, "Lines");
     40             return true;
     41         }
     42         return this->INHERITED::onQuery(evt);
     43     }
     44 
     45     /*
     46      0x1F * x + 0x1F * (32 - x)
     47      */
     48     void drawRings(SkCanvas* canvas) {
     49         canvas->scale(SkIntToScalar(1)/2, SkIntToScalar(1)/2);
     50 
     51         SkRect  r;
     52         SkScalar x = SkIntToScalar(10);
     53         SkScalar y = SkIntToScalar(10);
     54         r.set(x, y, x + SkIntToScalar(100), y + SkIntToScalar(100));
     55 
     56         SkPaint paint;
     57      //   paint.setAntiAlias(true);
     58         paint.setStyle(SkPaint::kStroke_Style);
     59         paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3)));
     60         paint.setColor(0xFFFF8800);
     61      //   paint.setColor(0xFFFFFFFF);
     62         canvas->drawRect(r, paint);
     63     }
     64 
     65     virtual void onDrawContent(SkCanvas* canvas) {
     66         SkBitmap bm;
     67         SkImageDecoder::DecodeFile("/kill.gif", &bm);
     68         canvas->drawBitmap(bm, 0, 0, NULL);
     69 
     70         this->drawRings(canvas);
     71         return;
     72 
     73         SkPaint paint;
     74 
     75       //  fAlpha = 0x80;
     76         paint.setColor(SK_ColorWHITE);
     77         paint.setAlpha(fAlpha & 0xFF);
     78         SkRect r;
     79 
     80         SkScalar x = SkIntToScalar(10);
     81         SkScalar y = SkIntToScalar(10);
     82         r.set(x, y, x + SkIntToScalar(100), y + SkIntToScalar(100));
     83         canvas->drawRect(r, paint);
     84         return;
     85 
     86         paint.setColor(0xffffff00);            // yellow
     87         paint.setStyle(SkPaint::kStroke_Style);
     88         paint.setStrokeWidth(SkIntToScalar(2));
     89 
     90 //        y += SK_Scalar1/2;
     91 
     92         canvas->drawLine(x, y, x + SkIntToScalar(90), y + SkIntToScalar(90), paint);
     93 
     94         paint.setAntiAlias(true);              // with anti-aliasing
     95         y += SkIntToScalar(10);
     96         canvas->drawLine(x, y, x + SkIntToScalar(90), y + SkIntToScalar(90), paint);
     97     }
     98 
     99     virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE {
    100         fAlpha = SkScalarRoundToInt(y);
    101         this->inval(NULL);
    102         return NULL;
    103     }
    104 private:
    105 
    106     int fAlpha;
    107     typedef SampleView INHERITED;
    108 };
    109 
    110 //////////////////////////////////////////////////////////////////////////////
    111 
    112 static SkView* MyFactory() { return new LinesView; }
    113 static SkViewRegister reg(MyFactory);
    114