mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 1 | #include "SampleCode.h" |
| 2 | #include "SkView.h" |
| 3 | #include "SkCanvas.h" |
| 4 | #include "SkGraphics.h" |
| 5 | #include "SkRandom.h" |
| 6 | |
| 7 | class Draw : public SkRefCnt { |
| 8 | public: |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 9 | Draw() : fFlags(0) {} |
| 10 | |
| 11 | enum Flags { |
| 12 | kSelected_Flag = 1 << 0 |
| 13 | }; |
| 14 | int getFlags() const { return fFlags; } |
| 15 | void setFlags(int flags); |
| 16 | |
| 17 | bool isSelected() const { return SkToBool(fFlags & kSelected_Flag); } |
| 18 | void setSelected(bool pred) { |
| 19 | if (pred) { |
| 20 | fFlags |= kSelected_Flag; |
| 21 | } else { |
| 22 | fFlags &= ~kSelected_Flag; |
| 23 | } |
| 24 | } |
| 25 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 26 | void draw(SkCanvas* canvas) { |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 27 | int sc = canvas->save(); |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 28 | this->onDraw(canvas); |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 29 | canvas->restoreToCount(sc); |
| 30 | |
| 31 | if (this->isSelected()) { |
| 32 | this->drawSelection(canvas); |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | void drawSelection(SkCanvas* canvas) { |
| 37 | int sc = canvas->save(); |
| 38 | this->onDrawSelection(canvas); |
| 39 | canvas->restoreToCount(sc); |
| 40 | } |
| 41 | |
| 42 | void getBounds(SkRect* bounds) { |
| 43 | this->onGetBounds(bounds); |
| 44 | } |
| 45 | |
| 46 | bool hitTest(SkScalar x, SkScalar y) { |
| 47 | return this->onHitTest(x, y); |
| 48 | } |
| 49 | |
| 50 | void offset(SkScalar dx, SkScalar dy) { |
| 51 | if (dx || dy) { |
| 52 | this->onOffset(dx, dy); |
| 53 | } |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 54 | } |
| 55 | |
| 56 | protected: |
| 57 | virtual void onDraw(SkCanvas*) = 0; |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 58 | virtual void onGetBounds(SkRect*) = 0; |
| 59 | virtual void onOffset(SkScalar dx, SkScalar dy) = 0; |
| 60 | virtual void onDrawSelection(SkCanvas* canvas) { |
| 61 | SkRect r; |
| 62 | this->getBounds(&r); |
| 63 | SkPaint paint; |
| 64 | SkPoint pts[4]; |
| 65 | r.toQuad(pts); |
| 66 | paint.setStrokeWidth(SkIntToScalar(10)); |
| 67 | paint.setColor(0x80FF8844); |
| 68 | paint.setStrokeCap(SkPaint::kRound_Cap); |
| 69 | canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, pts, paint); |
| 70 | } |
| 71 | virtual bool onHitTest(SkScalar x, SkScalar y) { |
| 72 | SkRect bounds; |
| 73 | this->getBounds(&bounds); |
| 74 | return bounds.contains(x, y); |
| 75 | } |
| 76 | |
| 77 | private: |
| 78 | int fFlags; |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 79 | }; |
| 80 | |
| 81 | class RDraw : public Draw { |
| 82 | public: |
| 83 | enum Style { |
| 84 | kRect_Style, |
| 85 | kOval_Style, |
| 86 | kRRect_Style |
| 87 | }; |
| 88 | |
| 89 | RDraw(const SkRect& r, Style s) : fRect(r), fStyle(s) {} |
| 90 | |
| 91 | void setRect(const SkRect& r) { |
| 92 | fRect = r; |
| 93 | } |
| 94 | |
| 95 | void setPaint(const SkPaint& p) { |
| 96 | fPaint = p; |
| 97 | } |
| 98 | |
| 99 | protected: |
| 100 | virtual void onDraw(SkCanvas* canvas) { |
| 101 | switch (fStyle) { |
| 102 | case kRect_Style: |
| 103 | canvas->drawRect(fRect, fPaint); |
| 104 | break; |
| 105 | case kOval_Style: |
| 106 | canvas->drawOval(fRect, fPaint); |
| 107 | break; |
| 108 | case kRRect_Style: { |
| 109 | SkScalar rx = fRect.width() / 5; |
| 110 | SkScalar ry = fRect.height() / 5; |
| 111 | if (rx < ry) { |
| 112 | ry = rx; |
| 113 | } else { |
| 114 | rx = ry; |
| 115 | } |
| 116 | canvas->drawRoundRect(fRect, rx, ry, fPaint); |
| 117 | break; |
| 118 | } |
| 119 | } |
| 120 | } |
| 121 | |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 122 | virtual void onGetBounds(SkRect* bounds) { |
| 123 | *bounds = fRect; |
| 124 | } |
| 125 | |
| 126 | virtual void onOffset(SkScalar dx, SkScalar dy) { |
| 127 | fRect.offset(dx, dy); |
| 128 | } |
| 129 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 130 | private: |
| 131 | SkRect fRect; |
| 132 | SkPaint fPaint; |
| 133 | Style fStyle; |
| 134 | }; |
| 135 | |
| 136 | class DrawFactory { |
| 137 | public: |
| 138 | DrawFactory() { |
| 139 | fPaint.setAntiAlias(true); |
| 140 | } |
| 141 | |
| 142 | const SkPaint& getPaint() const { return fPaint; } |
| 143 | |
| 144 | void setPaint(const SkPaint& p) { |
| 145 | fPaint = p; |
| 146 | } |
| 147 | |
| 148 | virtual Draw* create(const SkPoint&, const SkPoint&) = 0; |
| 149 | |
| 150 | private: |
| 151 | SkPaint fPaint; |
| 152 | }; |
| 153 | |
| 154 | class RectFactory : public DrawFactory { |
| 155 | public: |
| 156 | virtual Draw* create(const SkPoint& p0, const SkPoint& p1) { |
| 157 | SkRect r; |
| 158 | r.set(p0.x(), p0.y(), p1.x(), p1.y()); |
| 159 | r.sort(); |
| 160 | |
| 161 | RDraw* d = new RDraw(r, RDraw::kRRect_Style); |
| 162 | d->setPaint(this->getPaint()); |
| 163 | return d; |
| 164 | } |
| 165 | }; |
| 166 | |
| 167 | class DrawView : public SkView { |
| 168 | Draw* fDraw; |
| 169 | DrawFactory* fFactory; |
| 170 | SkRandom fRand; |
| 171 | SkTDArray<Draw*> fList; |
| 172 | |
| 173 | public: |
| 174 | DrawView() : fDraw(NULL) { |
| 175 | fFactory = new RectFactory; |
| 176 | } |
| 177 | |
| 178 | virtual ~DrawView() { |
| 179 | fList.unrefAll(); |
| 180 | SkSafeUnref(fDraw); |
| 181 | } |
| 182 | |
| 183 | Draw* setDraw(Draw* d) { |
| 184 | SkRefCnt_SafeAssign(fDraw, d); |
| 185 | return d; |
| 186 | } |
| 187 | |
| 188 | SkColor randColor() { |
| 189 | return (SkColor)fRand.nextU() | 0xFF000000; |
| 190 | } |
| 191 | |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 192 | Draw* hitTestList(SkScalar x, SkScalar y) const { |
| 193 | Draw** first = fList.begin(); |
| 194 | for (Draw** iter = fList.end(); iter > first;) { |
| 195 | --iter; |
| 196 | if ((*iter)->hitTest(x, y)) { |
| 197 | return *iter; |
| 198 | } |
| 199 | } |
| 200 | return NULL; |
| 201 | } |
| 202 | |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 203 | protected: |
| 204 | // overrides from SkEventSink |
| 205 | virtual bool onQuery(SkEvent* evt) { |
| 206 | if (SampleCode::TitleQ(*evt)) { |
| 207 | SampleCode::TitleR(evt, "Draw"); |
| 208 | return true; |
| 209 | } |
| 210 | return this->INHERITED::onQuery(evt); |
| 211 | } |
| 212 | |
| 213 | void drawBG(SkCanvas* canvas) { |
| 214 | canvas->drawColor(0xFFDDDDDD); |
| 215 | // canvas->drawColor(SK_ColorWHITE); |
| 216 | } |
| 217 | |
| 218 | virtual void onDraw(SkCanvas* canvas) { |
| 219 | this->drawBG(canvas); |
| 220 | |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 221 | for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 222 | (*iter)->draw(canvas); |
| 223 | } |
| 224 | if (fDraw) { |
| 225 | fDraw->draw(canvas); |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 230 | for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
| 231 | (*iter)->setSelected(false); |
| 232 | } |
| 233 | |
| 234 | Click* c = new Click(this); |
| 235 | Draw* d = this->hitTestList(x, y); |
| 236 | if (d) { |
| 237 | d->setSelected(true); |
| 238 | c->setType("dragger"); |
| 239 | } else { |
| 240 | c->setType("maker"); |
| 241 | } |
| 242 | return c; |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | virtual bool onClick(Click* click) { |
| 246 | if (Click::kUp_State == click->fState) { |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 247 | if (click->isType("maker")) { |
| 248 | if (SkPoint::Distance(click->fOrig, click->fCurr) > SkIntToScalar(3)) { |
| 249 | *fList.append() = fDraw; |
| 250 | } else { |
| 251 | fDraw->unref(); |
| 252 | } |
| 253 | fDraw = NULL; |
| 254 | } |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 255 | return true; |
| 256 | } |
| 257 | |
| 258 | if (Click::kDown_State == click->fState) { |
| 259 | SkPaint p = fFactory->getPaint(); |
| 260 | p.setColor(this->randColor()); |
| 261 | fFactory->setPaint(p); |
| 262 | } |
mike@reedtribe.org | dd0cd34 | 2011-03-21 00:53:39 +0000 | [diff] [blame^] | 263 | |
| 264 | if (click->isType("maker")) { |
| 265 | this->setDraw(fFactory->create(click->fOrig, click->fCurr))->unref(); |
| 266 | } else if (click->isType("dragger")) { |
| 267 | for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
| 268 | if ((*iter)->isSelected()) { |
| 269 | (*iter)->offset(click->fCurr.x() - click->fPrev.x(), |
| 270 | click->fCurr.y() - click->fPrev.y()); |
| 271 | } |
| 272 | } |
| 273 | } |
mike@reedtribe.org | b7d956d | 2011-03-20 20:19:16 +0000 | [diff] [blame] | 274 | this->inval(NULL); |
| 275 | return true; |
| 276 | } |
| 277 | |
| 278 | private: |
| 279 | typedef SkView INHERITED; |
| 280 | }; |
| 281 | |
| 282 | ////////////////////////////////////////////////////////////////////////////// |
| 283 | |
| 284 | static SkView* MyFactory() { return new DrawView; } |
| 285 | static SkViewRegister reg(MyFactory); |
| 286 | |