| #include "SampleCode.h" |
| #include "SkView.h" |
| #include "SkCanvas.h" |
| #include "SkGradientShader.h" |
| #include "SkPath.h" |
| #include "SkRegion.h" |
| #include "SkShader.h" |
| #include "SkUtils.h" |
| #include "SkComposeShader.h" |
| #include "Sk1DPathEffect.h" |
| #include "SkCornerPathEffect.h" |
| #include "SkPathMeasure.h" |
| #include "SkRandom.h" |
| #include "SkColorPriv.h" |
| #include "SkColorFilter.h" |
| #include "SkPorterDuff.h" |
| #include "SkLayerRasterizer.h" |
| |
| class ArcsView : public SkView { |
| public: |
| ArcsView() |
| { |
| fSweep = SkIntToScalar(100); |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| virtual bool onQuery(SkEvent* evt) |
| { |
| if (SampleCode::TitleQ(*evt)) |
| { |
| SampleCode::TitleR(evt, "Arcs"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| void drawBG(SkCanvas* canvas) |
| { |
| canvas->drawColor(0xFFDDDDDD); |
| } |
| |
| static void drawRectWithLines(SkCanvas* canvas, const SkRect& r, const SkPaint& p) |
| { |
| canvas->drawRect(r, p); |
| canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, p); |
| canvas->drawLine(r.fLeft, r.fBottom, r.fRight, r.fTop, p); |
| canvas->drawLine(r.fLeft, r.centerY(), r.fRight, r.centerY(), p); |
| canvas->drawLine(r.centerX(), r.fTop, r.centerX(), r.fBottom, p); |
| } |
| |
| static void draw_label(SkCanvas* canvas, const SkRect& rect, |
| int start, int sweep) |
| { |
| SkPaint paint; |
| |
| paint.setAntiAlias(true); |
| paint.setTextAlign(SkPaint::kCenter_Align); |
| |
| SkString str; |
| |
| str.appendS32(start); |
| str.append(", "); |
| str.appendS32(sweep); |
| canvas->drawText(str.c_str(), str.size(), rect.centerX(), |
| rect.fBottom + paint.getTextSize() * 5/4, paint); |
| } |
| |
| static void drawArcs(SkCanvas* canvas) |
| { |
| SkPaint paint; |
| SkRect r; |
| SkScalar w = SkIntToScalar(75); |
| SkScalar h = SkIntToScalar(50); |
| |
| r.set(0, 0, w, h); |
| paint.setAntiAlias(true); |
| paint.setStyle(SkPaint::kStroke_Style); |
| |
| canvas->save(); |
| canvas->translate(SkIntToScalar(10), SkIntToScalar(300)); |
| |
| paint.setStrokeWidth(SkIntToScalar(1)); |
| |
| static const int gAngles[] = { |
| 0, 360, |
| 0, 45, |
| 0, -45, |
| 720, 135, |
| -90, 269, |
| -90, 270, |
| -90, 271, |
| -180, -270, |
| 225, 90 |
| }; |
| |
| for (int i = 0; i < SK_ARRAY_COUNT(gAngles); i += 2) |
| { |
| paint.setColor(SK_ColorBLACK); |
| drawRectWithLines(canvas, r, paint); |
| |
| paint.setColor(SK_ColorRED); |
| canvas->drawArc(r, SkIntToScalar(gAngles[i]), |
| SkIntToScalar(gAngles[i+1]), false, paint); |
| |
| draw_label(canvas, r, gAngles[i], gAngles[i+1]); |
| |
| canvas->translate(w * 8 / 7, 0); |
| } |
| |
| canvas->restore(); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) |
| { |
| this->drawBG(canvas); |
| |
| SkRect r; |
| SkPaint paint; |
| |
| paint.setAntiAlias(true); |
| paint.setStrokeWidth(SkIntToScalar(2)); |
| paint.setStyle(SkPaint::kStroke_Style); |
| |
| r.set(0, 0, SkIntToScalar(200), SkIntToScalar(200)); |
| r.offset(SkIntToScalar(20), SkIntToScalar(20)); |
| |
| if (false) { |
| const SkScalar d = SkIntToScalar(3); |
| const SkScalar rad[] = { d, d, d, d, d, d, d, d }; |
| SkPath path; |
| path.addRoundRect(r, rad); |
| canvas->drawPath(path, paint); |
| return; |
| } |
| |
| drawRectWithLines(canvas, r, paint); |
| |
| // printf("----- sweep %g %X\n", SkScalarToFloat(fSweep), SkDegreesToRadians(fSweep)); |
| |
| |
| paint.setStyle(SkPaint::kFill_Style); |
| paint.setColor(0x800000FF); |
| canvas->drawArc(r, 0, fSweep, true, paint); |
| |
| paint.setColor(0x800FF000); |
| canvas->drawArc(r, 0, fSweep, false, paint); |
| |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setColor(SK_ColorRED); |
| canvas->drawArc(r, 0, fSweep, true, paint); |
| |
| paint.setStrokeWidth(0); |
| paint.setColor(SK_ColorBLUE); |
| canvas->drawArc(r, 0, fSweep, false, paint); |
| |
| fSweep += SK_Scalar1/4; |
| if (fSweep > SkIntToScalar(360)) |
| fSweep = 0; |
| |
| drawArcs(canvas); |
| this->inval(NULL); |
| } |
| |
| virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) |
| { |
| // fSweep += SK_Scalar1; |
| this->inval(NULL); |
| return this->INHERITED::onFindClickHandler(x, y); |
| } |
| |
| virtual bool onClick(Click* click) |
| { |
| return this->INHERITED::onClick(click); |
| } |
| |
| private: |
| SkScalar fSweep; |
| |
| typedef SkView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new ArcsView; } |
| static SkViewRegister reg(MyFactory); |
| |