| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkColorPriv.h" |
| #include "include/core/SkDrawable.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkPath.h" |
| #include "include/core/SkPathMeasure.h" |
| #include "include/core/SkPictureRecorder.h" |
| #include "include/core/SkRegion.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkString.h" |
| #include "include/effects/Sk1DPathEffect.h" |
| #include "include/effects/SkCornerPathEffect.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "include/utils/SkParsePath.h" |
| #include "include/utils/SkTextUtils.h" |
| #include "src/base/SkRandom.h" |
| #include "src/base/SkUTF.h" |
| #include "tools/fonts/FontToolUtils.h" |
| #include "tools/viewer/Slide.h" |
| |
| class ArcsSlide : public Slide { |
| class MyDrawable : public SkDrawable { |
| SkRect fR; |
| SkScalar fSweep; |
| public: |
| MyDrawable(const SkRect& r) : fR(r), fSweep(0) {} |
| |
| void setSweep(SkScalar sweep) { |
| if (fSweep != sweep) { |
| fSweep = sweep; |
| this->notifyDrawingChanged(); |
| } |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setStrokeWidth(SkIntToScalar(2)); |
| |
| paint.setStyle(SkPaint::kFill_Style); |
| paint.setColor(0x800000FF); |
| canvas->drawArc(fR, 0, fSweep, true, paint); |
| |
| paint.setColor(0x800FF000); |
| canvas->drawArc(fR, 0, fSweep, false, paint); |
| |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setColor(SK_ColorRED); |
| canvas->drawArc(fR, 0, fSweep, true, paint); |
| |
| paint.setStrokeWidth(0); |
| paint.setColor(SK_ColorBLUE); |
| canvas->drawArc(fR, 0, fSweep, false, paint); |
| } |
| |
| SkRect onGetBounds() override { |
| SkRect r(fR); |
| r.outset(2, 2); |
| return r; |
| } |
| }; |
| |
| SkRect fRect = {20, 20, 220, 220}; |
| sk_sp<MyDrawable> fAnimatingDrawable; |
| sk_sp<SkDrawable> fRootDrawable; |
| |
| 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 DrawLabel(SkCanvas* canvas, const SkRect& rect, SkScalar start, SkScalar sweep) { |
| SkFont font = ToolUtils::DefaultFont(); |
| SkString str; |
| str.appendScalar(start); |
| str.append(", "); |
| str.appendScalar(sweep); |
| SkTextUtils::DrawString(canvas, str.c_str(), rect.centerX(), |
| rect.fBottom + font.getSize() * 5/4, font, SkPaint(), |
| SkTextUtils::kCenter_Align); |
| } |
| |
| static void DrawArcs(SkCanvas* canvas) { |
| SkPaint paint; |
| SkRect r; |
| SkScalar w = 75; |
| SkScalar h = 50; |
| |
| r.setWH(w, h); |
| paint.setAntiAlias(true); |
| paint.setStyle(SkPaint::kStroke_Style); |
| |
| canvas->save(); |
| canvas->translate(SkIntToScalar(10), SkIntToScalar(300)); |
| |
| paint.setStrokeWidth(SkIntToScalar(1)); |
| |
| static const SkScalar gAngles[] = { |
| 0, 360, |
| 0, 45, |
| 0, -45, |
| 720, 135, |
| -90, 269, |
| -90, 270, |
| -90, 271, |
| -180, -270, |
| 225, 90 |
| }; |
| |
| for (size_t i = 0; i < std::size(gAngles); i += 2) { |
| paint.setColor(SK_ColorBLACK); |
| DrawRectWithLines(canvas, r, paint); |
| |
| paint.setColor(SK_ColorRED); |
| canvas->drawArc(r, gAngles[i], gAngles[i+1], false, paint); |
| |
| DrawLabel(canvas, r, gAngles[i], gAngles[i+1]); |
| |
| canvas->translate(w * 8 / 7, 0); |
| } |
| |
| canvas->restore(); |
| } |
| |
| void drawRoot(SkCanvas* canvas) { |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| paint.setStrokeWidth(SkIntToScalar(2)); |
| paint.setStyle(SkPaint::kStroke_Style); |
| |
| DrawRectWithLines(canvas, fRect, paint); |
| |
| canvas->drawDrawable(fAnimatingDrawable.get()); |
| |
| DrawArcs(canvas); |
| } |
| |
| public: |
| ArcsSlide() { fName = "Arcs"; } |
| |
| void load(SkScalar w, SkScalar h) override { |
| fAnimatingDrawable = sk_make_sp<MyDrawable>(fRect); |
| |
| SkPictureRecorder recorder; |
| this->drawRoot(recorder.beginRecording(SkRect::MakeWH(800, 500))); |
| fRootDrawable = recorder.finishRecordingAsDrawable(); |
| } |
| |
| void draw(SkCanvas* canvas) override { |
| canvas->clear(0xFFDDDDDD); |
| canvas->drawDrawable(fRootDrawable.get()); |
| } |
| |
| bool animate(double nanos) override { |
| SkScalar angle = SkDoubleToScalar(fmod(1e-9 * nanos * 360 / 24, 360)); |
| if (fAnimatingDrawable) { |
| fAnimatingDrawable->setSweep(angle); |
| } |
| return true; |
| } |
| }; |
| |
| DEF_SLIDE( return new ArcsSlide(); ) |