epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 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 | */ |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 7 | #include "SampleCode.h" |
| 8 | #include "SkView.h" |
| 9 | #include "SkCanvas.h" |
| 10 | #include "SkGraphics.h" |
| 11 | #include "SkRandom.h" |
| 12 | |
reed@google.com | 2f3dc9d | 2011-05-02 17:33:45 +0000 | [diff] [blame] | 13 | static void test_clearonlayers(SkCanvas* canvas) { |
| 14 | SkCanvas& c = *canvas; |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 15 | |
reed@google.com | 2f3dc9d | 2011-05-02 17:33:45 +0000 | [diff] [blame] | 16 | SkPaint paint; |
| 17 | paint.setColor(SK_ColorBLUE); |
| 18 | paint.setStyle(SkPaint::kStrokeAndFill_Style); |
| 19 | SkRect rect = SkRect::MakeXYWH(25, 25, 50, 50); |
| 20 | c.drawRect(rect, paint); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 21 | |
reed@google.com | 2f3dc9d | 2011-05-02 17:33:45 +0000 | [diff] [blame] | 22 | c.clipRect(rect); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 23 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 24 | c.saveLayer(nullptr, nullptr); |
reed@google.com | 2f3dc9d | 2011-05-02 17:33:45 +0000 | [diff] [blame] | 25 | rect = SkRect::MakeXYWH(50, 10, 40, 80); |
| 26 | c.clipRect(rect, SkRegion::kUnion_Op); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 27 | |
reed@google.com | 2f3dc9d | 2011-05-02 17:33:45 +0000 | [diff] [blame] | 28 | rect = SkRect::MakeXYWH(50, 0, 50, 100); |
| 29 | // You might draw something here, but it's not necessary. |
| 30 | // paint.setColor(SK_ColorRED); |
| 31 | // c.drawRect(rect, paint); |
| 32 | paint.setXfermodeMode(SkXfermode::kClear_Mode); |
| 33 | c.drawRect(rect, paint); |
| 34 | c.restore(); |
| 35 | } |
| 36 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 37 | static void test_strokerect(SkCanvas* canvas, const SkRect& r) { |
| 38 | SkPaint p; |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 39 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 40 | p.setAntiAlias(true); |
| 41 | p.setStyle(SkPaint::kStroke_Style); |
| 42 | p.setStrokeWidth(4); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 43 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 44 | canvas->drawRect(r, p); |
| 45 | |
| 46 | SkPath path; |
| 47 | SkRect r2(r); |
| 48 | r2.offset(18, 0); |
| 49 | path.addRect(r2); |
| 50 | |
| 51 | canvas->drawPath(path, p); |
| 52 | } |
| 53 | |
| 54 | static void test_strokerect(SkCanvas* canvas) { |
| 55 | canvas->drawColor(SK_ColorWHITE); |
| 56 | |
| 57 | SkRect r; |
| 58 | |
| 59 | r.set(10, 10, 14, 14); |
reed@google.com | 261b8e2 | 2011-04-14 17:53:24 +0000 | [diff] [blame] | 60 | r.offset(0.25f, 0.3333f); |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 61 | test_strokerect(canvas, r); |
| 62 | canvas->translate(0, 20); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 63 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 64 | r.set(10, 10, 14.5f, 14.5f); |
reed@google.com | 261b8e2 | 2011-04-14 17:53:24 +0000 | [diff] [blame] | 65 | r.offset(0.25f, 0.3333f); |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 66 | test_strokerect(canvas, r); |
| 67 | canvas->translate(0, 20); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 68 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 69 | r.set(10, 10, 14.5f, 20); |
reed@google.com | 261b8e2 | 2011-04-14 17:53:24 +0000 | [diff] [blame] | 70 | r.offset(0.25f, 0.3333f); |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 71 | test_strokerect(canvas, r); |
| 72 | canvas->translate(0, 20); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 73 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 74 | r.set(10, 10, 20, 14.5f); |
reed@google.com | 261b8e2 | 2011-04-14 17:53:24 +0000 | [diff] [blame] | 75 | r.offset(0.25f, 0.3333f); |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 76 | test_strokerect(canvas, r); |
| 77 | canvas->translate(0, 20); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 78 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 79 | r.set(10, 10, 20, 20); |
reed@google.com | 261b8e2 | 2011-04-14 17:53:24 +0000 | [diff] [blame] | 80 | r.offset(0.25f, 0.3333f); |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 81 | test_strokerect(canvas, r); |
| 82 | canvas->translate(0, 20); |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 83 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 84 | } |
| 85 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 86 | class Draw : public SkRefCnt { |
| 87 | public: |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 88 | Draw() : fFlags(0) {} |
| 89 | |
| 90 | enum Flags { |
| 91 | kSelected_Flag = 1 << 0 |
| 92 | }; |
| 93 | int getFlags() const { return fFlags; } |
| 94 | void setFlags(int flags); |
| 95 | |
| 96 | bool isSelected() const { return SkToBool(fFlags & kSelected_Flag); } |
| 97 | void setSelected(bool pred) { |
| 98 | if (pred) { |
| 99 | fFlags |= kSelected_Flag; |
| 100 | } else { |
| 101 | fFlags &= ~kSelected_Flag; |
| 102 | } |
| 103 | } |
| 104 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 105 | void draw(SkCanvas* canvas) { |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 106 | int sc = canvas->save(); |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 107 | this->onDraw(canvas); |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 108 | canvas->restoreToCount(sc); |
| 109 | |
| 110 | if (this->isSelected()) { |
| 111 | this->drawSelection(canvas); |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | void drawSelection(SkCanvas* canvas) { |
| 116 | int sc = canvas->save(); |
| 117 | this->onDrawSelection(canvas); |
| 118 | canvas->restoreToCount(sc); |
| 119 | } |
| 120 | |
| 121 | void getBounds(SkRect* bounds) { |
| 122 | this->onGetBounds(bounds); |
| 123 | } |
| 124 | |
| 125 | bool hitTest(SkScalar x, SkScalar y) { |
| 126 | return this->onHitTest(x, y); |
| 127 | } |
| 128 | |
| 129 | void offset(SkScalar dx, SkScalar dy) { |
| 130 | if (dx || dy) { |
| 131 | this->onOffset(dx, dy); |
| 132 | } |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | protected: |
| 136 | virtual void onDraw(SkCanvas*) = 0; |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 137 | virtual void onGetBounds(SkRect*) = 0; |
| 138 | virtual void onOffset(SkScalar dx, SkScalar dy) = 0; |
| 139 | virtual void onDrawSelection(SkCanvas* canvas) { |
| 140 | SkRect r; |
| 141 | this->getBounds(&r); |
| 142 | SkPaint paint; |
| 143 | SkPoint pts[4]; |
| 144 | r.toQuad(pts); |
| 145 | paint.setStrokeWidth(SkIntToScalar(10)); |
| 146 | paint.setColor(0x80FF8844); |
| 147 | paint.setStrokeCap(SkPaint::kRound_Cap); |
| 148 | canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, pts, paint); |
| 149 | } |
| 150 | virtual bool onHitTest(SkScalar x, SkScalar y) { |
| 151 | SkRect bounds; |
| 152 | this->getBounds(&bounds); |
| 153 | return bounds.contains(x, y); |
| 154 | } |
| 155 | |
| 156 | private: |
| 157 | int fFlags; |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 158 | }; |
| 159 | |
| 160 | class RDraw : public Draw { |
| 161 | public: |
| 162 | enum Style { |
| 163 | kRect_Style, |
| 164 | kOval_Style, |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 165 | kRRect_Style, |
| 166 | kFrame_Style |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 167 | }; |
| 168 | |
| 169 | RDraw(const SkRect& r, Style s) : fRect(r), fStyle(s) {} |
| 170 | |
| 171 | void setRect(const SkRect& r) { |
| 172 | fRect = r; |
| 173 | } |
| 174 | |
| 175 | void setPaint(const SkPaint& p) { |
| 176 | fPaint = p; |
| 177 | } |
| 178 | |
| 179 | protected: |
| 180 | virtual void onDraw(SkCanvas* canvas) { |
| 181 | switch (fStyle) { |
| 182 | case kRect_Style: |
| 183 | canvas->drawRect(fRect, fPaint); |
| 184 | break; |
| 185 | case kOval_Style: |
| 186 | canvas->drawOval(fRect, fPaint); |
| 187 | break; |
| 188 | case kRRect_Style: { |
| 189 | SkScalar rx = fRect.width() / 5; |
| 190 | SkScalar ry = fRect.height() / 5; |
| 191 | if (rx < ry) { |
| 192 | ry = rx; |
| 193 | } else { |
| 194 | rx = ry; |
| 195 | } |
| 196 | canvas->drawRoundRect(fRect, rx, ry, fPaint); |
| 197 | break; |
| 198 | } |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 199 | case kFrame_Style: { |
| 200 | SkPath path; |
| 201 | path.addOval(fRect, SkPath::kCW_Direction); |
| 202 | SkRect r = fRect; |
| 203 | r.inset(fRect.width()/6, 0); |
| 204 | path.addOval(r, SkPath::kCCW_Direction); |
| 205 | canvas->drawPath(path, fPaint); |
| 206 | break; |
| 207 | } |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 208 | } |
| 209 | } |
| 210 | |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 211 | virtual void onGetBounds(SkRect* bounds) { |
| 212 | *bounds = fRect; |
| 213 | } |
| 214 | |
| 215 | virtual void onOffset(SkScalar dx, SkScalar dy) { |
| 216 | fRect.offset(dx, dy); |
| 217 | } |
| 218 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 219 | private: |
| 220 | SkRect fRect; |
| 221 | SkPaint fPaint; |
| 222 | Style fStyle; |
| 223 | }; |
| 224 | |
| 225 | class DrawFactory { |
| 226 | public: |
| 227 | DrawFactory() { |
| 228 | fPaint.setAntiAlias(true); |
| 229 | } |
| 230 | |
| 231 | const SkPaint& getPaint() const { return fPaint; } |
| 232 | |
| 233 | void setPaint(const SkPaint& p) { |
| 234 | fPaint = p; |
| 235 | } |
| 236 | |
| 237 | virtual Draw* create(const SkPoint&, const SkPoint&) = 0; |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 238 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 239 | private: |
| 240 | SkPaint fPaint; |
| 241 | }; |
| 242 | |
| 243 | class RectFactory : public DrawFactory { |
| 244 | public: |
| 245 | virtual Draw* create(const SkPoint& p0, const SkPoint& p1) { |
| 246 | SkRect r; |
| 247 | r.set(p0.x(), p0.y(), p1.x(), p1.y()); |
| 248 | r.sort(); |
| 249 | |
mike@reedtribe.org | a8282ef | 2011-04-14 01:22:45 +0000 | [diff] [blame] | 250 | // RDraw* d = new RDraw(r, RDraw::kRRect_Style); |
| 251 | RDraw* d = new RDraw(r, RDraw::kFrame_Style); |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 252 | d->setPaint(this->getPaint()); |
| 253 | return d; |
| 254 | } |
| 255 | }; |
| 256 | |
| 257 | class DrawView : public SkView { |
| 258 | Draw* fDraw; |
| 259 | DrawFactory* fFactory; |
| 260 | SkRandom fRand; |
| 261 | SkTDArray<Draw*> fList; |
| 262 | |
| 263 | public: |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 264 | DrawView() : fDraw(nullptr) { |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 265 | fFactory = new RectFactory; |
| 266 | } |
| 267 | |
| 268 | virtual ~DrawView() { |
| 269 | fList.unrefAll(); |
| 270 | SkSafeUnref(fDraw); |
reed@google.com | 1d5aaa8 | 2011-05-31 15:35:54 +0000 | [diff] [blame] | 271 | delete fFactory; |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 272 | } |
| 273 | |
| 274 | Draw* setDraw(Draw* d) { |
| 275 | SkRefCnt_SafeAssign(fDraw, d); |
| 276 | return d; |
| 277 | } |
| 278 | |
| 279 | SkColor randColor() { |
| 280 | return (SkColor)fRand.nextU() | 0xFF000000; |
| 281 | } |
| 282 | |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 283 | Draw* hitTestList(SkScalar x, SkScalar y) const { |
| 284 | Draw** first = fList.begin(); |
| 285 | for (Draw** iter = fList.end(); iter > first;) { |
| 286 | --iter; |
| 287 | if ((*iter)->hitTest(x, y)) { |
| 288 | return *iter; |
| 289 | } |
| 290 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 291 | return nullptr; |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 292 | } |
rmistry@google.com | ae933ce | 2012-08-23 18:19:56 +0000 | [diff] [blame] | 293 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 294 | protected: |
| 295 | // overrides from SkEventSink |
| 296 | virtual bool onQuery(SkEvent* evt) { |
| 297 | if (SampleCode::TitleQ(*evt)) { |
| 298 | SampleCode::TitleR(evt, "Draw"); |
| 299 | return true; |
| 300 | } |
| 301 | return this->INHERITED::onQuery(evt); |
| 302 | } |
| 303 | |
| 304 | void drawBG(SkCanvas* canvas) { |
| 305 | canvas->drawColor(0xFFDDDDDD); |
| 306 | // canvas->drawColor(SK_ColorWHITE); |
| 307 | } |
| 308 | |
| 309 | virtual void onDraw(SkCanvas* canvas) { |
| 310 | this->drawBG(canvas); |
reed@google.com | 2f3dc9d | 2011-05-02 17:33:45 +0000 | [diff] [blame] | 311 | test_clearonlayers(canvas); return; |
| 312 | // test_strokerect(canvas); return; |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 313 | |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 314 | for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 315 | (*iter)->draw(canvas); |
| 316 | } |
| 317 | if (fDraw) { |
| 318 | fDraw->draw(canvas); |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 323 | for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
| 324 | (*iter)->setSelected(false); |
| 325 | } |
| 326 | |
| 327 | Click* c = new Click(this); |
| 328 | Draw* d = this->hitTestList(x, y); |
| 329 | if (d) { |
| 330 | d->setSelected(true); |
| 331 | c->setType("dragger"); |
| 332 | } else { |
| 333 | c->setType("maker"); |
| 334 | } |
| 335 | return c; |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 336 | } |
| 337 | |
| 338 | virtual bool onClick(Click* click) { |
| 339 | if (Click::kUp_State == click->fState) { |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 340 | if (click->isType("maker")) { |
| 341 | if (SkPoint::Distance(click->fOrig, click->fCurr) > SkIntToScalar(3)) { |
| 342 | *fList.append() = fDraw; |
| 343 | } else { |
| 344 | fDraw->unref(); |
| 345 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 346 | fDraw = nullptr; |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 347 | } |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 348 | return true; |
| 349 | } |
| 350 | |
| 351 | if (Click::kDown_State == click->fState) { |
| 352 | SkPaint p = fFactory->getPaint(); |
| 353 | p.setColor(this->randColor()); |
| 354 | fFactory->setPaint(p); |
| 355 | } |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame] | 356 | |
| 357 | if (click->isType("maker")) { |
| 358 | this->setDraw(fFactory->create(click->fOrig, click->fCurr))->unref(); |
| 359 | } else if (click->isType("dragger")) { |
| 360 | for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
| 361 | if ((*iter)->isSelected()) { |
| 362 | (*iter)->offset(click->fCurr.x() - click->fPrev.x(), |
| 363 | click->fCurr.y() - click->fPrev.y()); |
| 364 | } |
| 365 | } |
| 366 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 367 | this->inval(nullptr); |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 368 | return true; |
| 369 | } |
| 370 | |
| 371 | private: |
| 372 | typedef SkView INHERITED; |
| 373 | }; |
| 374 | |
| 375 | ////////////////////////////////////////////////////////////////////////////// |
| 376 | |
| 377 | static SkView* MyFactory() { return new DrawView; } |
| 378 | static SkViewRegister reg(MyFactory); |