reed | 1a9caff | 2015-09-02 19:05:10 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 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 "SkAnimTimer.h" |
| 10 | #include "SkDrawable.h" |
| 11 | #include "SkView.h" |
| 12 | #include "SkCanvas.h" |
| 13 | #include "SkDrawable.h" |
| 14 | #include "SkPath.h" |
| 15 | #include "SkRandom.h" |
| 16 | #include "SkRSXform.h" |
| 17 | #include "SkSurface.h" |
| 18 | #include "SkGradientShader.h" |
| 19 | |
| 20 | const struct { |
| 21 | SkXfermode::Mode fMode; |
| 22 | const char* fName; |
| 23 | } gModes[] = { |
| 24 | { SkXfermode::kSrcOver_Mode, "src-over" }, |
| 25 | { SkXfermode::kSrc_Mode, "src" }, |
| 26 | { SkXfermode::kSrcIn_Mode, "src-in" }, |
| 27 | { SkXfermode::kSrcOut_Mode, "src-out" }, |
| 28 | { SkXfermode::kSrcATop_Mode, "src-atop" }, |
| 29 | { SkXfermode::kDstOver_Mode, "dst-over" }, |
| 30 | { SkXfermode::kDstIn_Mode, "dst-in" }, |
| 31 | { SkXfermode::kDstOut_Mode, "dst-out" }, |
| 32 | { SkXfermode::kDstATop_Mode, "dst-atop" }, |
| 33 | }; |
| 34 | const int N_Modes = SK_ARRAY_COUNT(gModes); |
| 35 | |
| 36 | class HasEventWig : public SkView { |
| 37 | public: |
| 38 | void postWidgetEvent() { |
| 39 | SkEvent evt; |
| 40 | this->onPrepareWidEvent(&evt); |
| 41 | this->postToListeners(evt, 0); |
| 42 | } |
| 43 | |
| 44 | protected: |
| 45 | virtual void onPrepareWidEvent(SkEvent*) {} |
| 46 | }; |
| 47 | |
| 48 | static SkRandom gRand; |
| 49 | |
| 50 | class PushButtonWig : public HasEventWig { |
| 51 | SkString fLabel; |
| 52 | SkColor fColor; |
| 53 | uint32_t fFast32; |
| 54 | |
| 55 | public: |
| 56 | PushButtonWig(const char label[], uint32_t fast) : fLabel(label) { |
| 57 | fColor = (gRand.nextU() & 0x7F7F7F7F) | SkColorSetARGB(0xFF, 0, 0, 0x80); |
| 58 | fFast32 = fast; |
| 59 | } |
| 60 | |
| 61 | protected: |
| 62 | void onPrepareWidEvent(SkEvent* evt) override { |
| 63 | evt->setType("push-button"); |
| 64 | evt->setFast32(fFast32); |
| 65 | evt->setString("label", fLabel.c_str()); |
| 66 | } |
| 67 | |
| 68 | // bool onEvent(const SkEvent&) override; |
| 69 | void onDraw(SkCanvas* canvas) override { |
| 70 | SkRect r; |
| 71 | this->getLocalBounds(&r); |
| 72 | SkPaint paint; |
| 73 | paint.setAntiAlias(true); |
| 74 | paint.setColor(fColor); |
| 75 | canvas->drawRoundRect(r, 8, 8, paint); |
| 76 | |
| 77 | paint.setColor(0xFFFFFFFF); |
| 78 | paint.setTextSize(16); |
| 79 | paint.setTextAlign(SkPaint::kCenter_Align); |
| 80 | paint.setLCDRenderText(true); |
| 81 | canvas->drawText(fLabel.c_str(), fLabel.size(), r.centerX(), r.fTop + 0.68f * r.height(), paint); |
| 82 | } |
| 83 | |
| 84 | Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override { |
| 85 | return new Click(this); |
| 86 | } |
| 87 | |
| 88 | bool onClick(Click* click) override { |
| 89 | SkRect target = SkRect::MakeXYWH(click->fCurr.x() - 1, click->fCurr.y() - 1, 3, 3); |
| 90 | SkRect r; |
| 91 | this->getLocalBounds(&r); |
| 92 | if (r.intersects(target)) { |
| 93 | fColor = SkColorSetA(fColor, 0x99); |
| 94 | } else { |
| 95 | fColor = SkColorSetA(fColor, 0xFF); |
| 96 | } |
| 97 | this->inval(nullptr); |
| 98 | |
| 99 | if (click->fState == SkView::Click::kUp_State) { |
| 100 | this->postWidgetEvent(); |
| 101 | } |
| 102 | return true; |
| 103 | } |
| 104 | |
| 105 | private: |
| 106 | typedef HasEventWig INHERITED; |
| 107 | }; |
| 108 | |
| 109 | |
| 110 | class ModeDrawable : public SkDrawable { |
| 111 | public: |
| 112 | ModeDrawable() : fMode(SkXfermode::kSrcOver_Mode), fLoc(SkPoint::Make(0, 0)) {} |
| 113 | |
| 114 | SkXfermode::Mode fMode; |
| 115 | SkPoint fLoc; |
| 116 | |
| 117 | bool hitTest(SkScalar x, SkScalar y) { |
| 118 | SkRect target = SkRect::MakeXYWH(x - fLoc.x() - 1, y - fLoc.y() - 1, 3, 3); |
| 119 | return this->getBounds().intersects(target); |
| 120 | } |
| 121 | }; |
| 122 | |
| 123 | class CircDrawable : public ModeDrawable { |
| 124 | SkPaint fPaint; |
| 125 | SkRect fBounds; |
| 126 | |
| 127 | public: |
| 128 | CircDrawable(SkScalar size, SkColor c) { |
| 129 | const SkColor colors[] = { 0, c }; |
| 130 | SkAutoTUnref<SkShader> shader(SkGradientShader::CreateRadial(SkPoint::Make(size/2, size/2), size/2, |
| 131 | colors, nullptr, 2, |
| 132 | SkShader::kClamp_TileMode)); |
| 133 | fPaint.setShader(shader); |
| 134 | fBounds = SkRect::MakeWH(size, size); |
| 135 | } |
| 136 | |
| 137 | protected: |
| 138 | SkRect onGetBounds() override { |
| 139 | return fBounds; |
| 140 | } |
| 141 | |
| 142 | void onDraw(SkCanvas* canvas) override { |
| 143 | fPaint.setXfermodeMode(fMode); |
| 144 | canvas->save(); |
| 145 | canvas->translate(fLoc.x(), fLoc.y()); |
| 146 | canvas->drawOval(fBounds, fPaint); |
| 147 | canvas->restore(); |
| 148 | } |
| 149 | }; |
| 150 | |
| 151 | class XferDemo : public SampleView { |
| 152 | enum { |
| 153 | N = 4 |
| 154 | }; |
| 155 | |
| 156 | SkRect fModeRect[N_Modes]; |
| 157 | SkAutoTUnref<CircDrawable> fDrs[N]; |
| 158 | CircDrawable* fSelected; |
| 159 | |
| 160 | void addButtons() { |
| 161 | SkScalar x = 10; |
| 162 | SkScalar y = 10; |
| 163 | for (int i = 0; i < N_Modes; ++i) { |
| 164 | SkAutoTUnref<SkView> v(new PushButtonWig(gModes[i].fName, gModes[i].fMode)); |
| 165 | v->setSize(70, 25); |
| 166 | v->setLoc(x, y); |
| 167 | v->setVisibleP(true); |
| 168 | v->setEnabledP(true); |
| 169 | v->addListenerID(this->getSinkID()); |
| 170 | this->attachChildToFront(v); |
| 171 | fModeRect[i] = SkRect::MakeXYWH(x, y + 28, 70, 2); |
| 172 | x += 80; |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | public: |
| 177 | XferDemo() { |
| 178 | const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorBLACK }; |
| 179 | for (int i = 0; i < N; ++i) { |
| 180 | fDrs[i].reset(new CircDrawable(200, colors[i])); |
| 181 | fDrs[i]->fLoc.set(100.f + i * 100, 100.f + i * 100); |
| 182 | fDrs[i]->fMode = SkXfermode::kSrcOver_Mode; |
| 183 | } |
| 184 | fSelected = nullptr; |
| 185 | |
| 186 | this->addButtons(); |
| 187 | } |
| 188 | |
| 189 | protected: |
| 190 | bool onEvent(const SkEvent& evt) override { |
| 191 | if (evt.isType("push-button")) { |
| 192 | if (fSelected) { |
| 193 | fSelected->fMode = (SkXfermode::Mode)evt.getFast32(); |
| 194 | this->inval(nullptr); |
| 195 | } |
| 196 | return true; |
| 197 | } |
| 198 | return this->INHERITED::onEvent(evt); |
| 199 | } |
| 200 | |
| 201 | bool onQuery(SkEvent* evt) override { |
| 202 | if (SampleCode::TitleQ(*evt)) { |
| 203 | SampleCode::TitleR(evt, "XferDemo"); |
| 204 | return true; |
| 205 | } |
| 206 | return this->INHERITED::onQuery(evt); |
| 207 | } |
| 208 | |
| 209 | void onDrawContent(SkCanvas* canvas) override { |
| 210 | SkPaint paint; |
| 211 | if (fSelected) { |
| 212 | for (int i = 0; i < N_Modes; ++i) { |
| 213 | if (fSelected->fMode == gModes[i].fMode) { |
| 214 | canvas->drawRect(fModeRect[i], paint); |
| 215 | break; |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | canvas->saveLayer(nullptr, nullptr); |
| 221 | for (int i = 0; i < N; ++i) { |
| 222 | fDrs[i]->draw(canvas); |
| 223 | } |
| 224 | canvas->restore(); |
| 225 | } |
| 226 | |
| 227 | SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override { |
| 228 | fSelected = nullptr; |
| 229 | for (int i = N - 1; i >= 0; --i) { |
| 230 | if (fDrs[i]->hitTest(x, y)) { |
| 231 | fSelected = fDrs[i]; |
| 232 | break; |
| 233 | } |
| 234 | } |
| 235 | this->inval(nullptr); |
| 236 | return fSelected ? new Click(this) : nullptr; |
| 237 | } |
| 238 | |
| 239 | bool onClick(Click* click) override { |
| 240 | fSelected->fLoc.fX += click->fCurr.fX - click->fPrev.fX; |
| 241 | fSelected->fLoc.fY += click->fCurr.fY - click->fPrev.fY; |
| 242 | this->inval(nullptr); |
| 243 | return true; |
| 244 | } |
| 245 | |
| 246 | private: |
| 247 | typedef SampleView INHERITED; |
| 248 | }; |
| 249 | |
| 250 | ////////////////////////////////////////////////////////////////////////////// |
| 251 | |
| 252 | DEF_SAMPLE( return new XferDemo; ) |