| #include "SampleCode.h" |
| #include "SkView.h" |
| #include "SkCanvas.h" |
| #include "SkGraphics.h" |
| #include "SkRandom.h" |
| |
| static void test_clearonlayers(SkCanvas* canvas) { |
| SkCanvas& c = *canvas; |
| |
| SkPaint paint; |
| paint.setColor(SK_ColorBLUE); |
| paint.setStyle(SkPaint::kStrokeAndFill_Style); |
| SkRect rect = SkRect::MakeXYWH(25, 25, 50, 50); |
| c.drawRect(rect, paint); |
| |
| c.clipRect(rect); |
| |
| c.saveLayer(NULL, NULL); |
| rect = SkRect::MakeXYWH(50, 10, 40, 80); |
| c.clipRect(rect, SkRegion::kUnion_Op); |
| |
| rect = SkRect::MakeXYWH(50, 0, 50, 100); |
| // You might draw something here, but it's not necessary. |
| // paint.setColor(SK_ColorRED); |
| // c.drawRect(rect, paint); |
| paint.setXfermodeMode(SkXfermode::kClear_Mode); |
| c.drawRect(rect, paint); |
| c.restore(); |
| } |
| |
| static void test_strokerect(SkCanvas* canvas, const SkRect& r) { |
| SkPaint p; |
| |
| p.setAntiAlias(true); |
| p.setStyle(SkPaint::kStroke_Style); |
| p.setStrokeWidth(4); |
| |
| canvas->drawRect(r, p); |
| |
| SkPath path; |
| SkRect r2(r); |
| r2.offset(18, 0); |
| path.addRect(r2); |
| |
| canvas->drawPath(path, p); |
| } |
| |
| static void test_strokerect(SkCanvas* canvas) { |
| canvas->drawColor(SK_ColorWHITE); |
| |
| SkRect r; |
| |
| r.set(10, 10, 14, 14); |
| r.offset(0.25f, 0.3333f); |
| test_strokerect(canvas, r); |
| canvas->translate(0, 20); |
| |
| r.set(10, 10, 14.5f, 14.5f); |
| r.offset(0.25f, 0.3333f); |
| test_strokerect(canvas, r); |
| canvas->translate(0, 20); |
| |
| r.set(10, 10, 14.5f, 20); |
| r.offset(0.25f, 0.3333f); |
| test_strokerect(canvas, r); |
| canvas->translate(0, 20); |
| |
| r.set(10, 10, 20, 14.5f); |
| r.offset(0.25f, 0.3333f); |
| test_strokerect(canvas, r); |
| canvas->translate(0, 20); |
| |
| r.set(10, 10, 20, 20); |
| r.offset(0.25f, 0.3333f); |
| test_strokerect(canvas, r); |
| canvas->translate(0, 20); |
| |
| } |
| |
| class Draw : public SkRefCnt { |
| public: |
| Draw() : fFlags(0) {} |
| |
| enum Flags { |
| kSelected_Flag = 1 << 0 |
| }; |
| int getFlags() const { return fFlags; } |
| void setFlags(int flags); |
| |
| bool isSelected() const { return SkToBool(fFlags & kSelected_Flag); } |
| void setSelected(bool pred) { |
| if (pred) { |
| fFlags |= kSelected_Flag; |
| } else { |
| fFlags &= ~kSelected_Flag; |
| } |
| } |
| |
| void draw(SkCanvas* canvas) { |
| int sc = canvas->save(); |
| this->onDraw(canvas); |
| canvas->restoreToCount(sc); |
| |
| if (this->isSelected()) { |
| this->drawSelection(canvas); |
| } |
| } |
| |
| void drawSelection(SkCanvas* canvas) { |
| int sc = canvas->save(); |
| this->onDrawSelection(canvas); |
| canvas->restoreToCount(sc); |
| } |
| |
| void getBounds(SkRect* bounds) { |
| this->onGetBounds(bounds); |
| } |
| |
| bool hitTest(SkScalar x, SkScalar y) { |
| return this->onHitTest(x, y); |
| } |
| |
| void offset(SkScalar dx, SkScalar dy) { |
| if (dx || dy) { |
| this->onOffset(dx, dy); |
| } |
| } |
| |
| protected: |
| virtual void onDraw(SkCanvas*) = 0; |
| virtual void onGetBounds(SkRect*) = 0; |
| virtual void onOffset(SkScalar dx, SkScalar dy) = 0; |
| virtual void onDrawSelection(SkCanvas* canvas) { |
| SkRect r; |
| this->getBounds(&r); |
| SkPaint paint; |
| SkPoint pts[4]; |
| r.toQuad(pts); |
| paint.setStrokeWidth(SkIntToScalar(10)); |
| paint.setColor(0x80FF8844); |
| paint.setStrokeCap(SkPaint::kRound_Cap); |
| canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, pts, paint); |
| } |
| virtual bool onHitTest(SkScalar x, SkScalar y) { |
| SkRect bounds; |
| this->getBounds(&bounds); |
| return bounds.contains(x, y); |
| } |
| |
| private: |
| int fFlags; |
| }; |
| |
| class RDraw : public Draw { |
| public: |
| enum Style { |
| kRect_Style, |
| kOval_Style, |
| kRRect_Style, |
| kFrame_Style |
| }; |
| |
| RDraw(const SkRect& r, Style s) : fRect(r), fStyle(s) {} |
| |
| void setRect(const SkRect& r) { |
| fRect = r; |
| } |
| |
| void setPaint(const SkPaint& p) { |
| fPaint = p; |
| } |
| |
| protected: |
| virtual void onDraw(SkCanvas* canvas) { |
| switch (fStyle) { |
| case kRect_Style: |
| canvas->drawRect(fRect, fPaint); |
| break; |
| case kOval_Style: |
| canvas->drawOval(fRect, fPaint); |
| break; |
| case kRRect_Style: { |
| SkScalar rx = fRect.width() / 5; |
| SkScalar ry = fRect.height() / 5; |
| if (rx < ry) { |
| ry = rx; |
| } else { |
| rx = ry; |
| } |
| canvas->drawRoundRect(fRect, rx, ry, fPaint); |
| break; |
| } |
| case kFrame_Style: { |
| SkPath path; |
| path.addOval(fRect, SkPath::kCW_Direction); |
| SkRect r = fRect; |
| r.inset(fRect.width()/6, 0); |
| path.addOval(r, SkPath::kCCW_Direction); |
| canvas->drawPath(path, fPaint); |
| break; |
| } |
| } |
| } |
| |
| virtual void onGetBounds(SkRect* bounds) { |
| *bounds = fRect; |
| } |
| |
| virtual void onOffset(SkScalar dx, SkScalar dy) { |
| fRect.offset(dx, dy); |
| } |
| |
| private: |
| SkRect fRect; |
| SkPaint fPaint; |
| Style fStyle; |
| }; |
| |
| class DrawFactory { |
| public: |
| DrawFactory() { |
| fPaint.setAntiAlias(true); |
| } |
| |
| const SkPaint& getPaint() const { return fPaint; } |
| |
| void setPaint(const SkPaint& p) { |
| fPaint = p; |
| } |
| |
| virtual Draw* create(const SkPoint&, const SkPoint&) = 0; |
| |
| private: |
| SkPaint fPaint; |
| }; |
| |
| class RectFactory : public DrawFactory { |
| public: |
| virtual Draw* create(const SkPoint& p0, const SkPoint& p1) { |
| SkRect r; |
| r.set(p0.x(), p0.y(), p1.x(), p1.y()); |
| r.sort(); |
| |
| // RDraw* d = new RDraw(r, RDraw::kRRect_Style); |
| RDraw* d = new RDraw(r, RDraw::kFrame_Style); |
| d->setPaint(this->getPaint()); |
| return d; |
| } |
| }; |
| |
| class DrawView : public SkView { |
| Draw* fDraw; |
| DrawFactory* fFactory; |
| SkRandom fRand; |
| SkTDArray<Draw*> fList; |
| |
| public: |
| DrawView() : fDraw(NULL) { |
| fFactory = new RectFactory; |
| } |
| |
| virtual ~DrawView() { |
| fList.unrefAll(); |
| SkSafeUnref(fDraw); |
| } |
| |
| Draw* setDraw(Draw* d) { |
| SkRefCnt_SafeAssign(fDraw, d); |
| return d; |
| } |
| |
| SkColor randColor() { |
| return (SkColor)fRand.nextU() | 0xFF000000; |
| } |
| |
| Draw* hitTestList(SkScalar x, SkScalar y) const { |
| Draw** first = fList.begin(); |
| for (Draw** iter = fList.end(); iter > first;) { |
| --iter; |
| if ((*iter)->hitTest(x, y)) { |
| return *iter; |
| } |
| } |
| return NULL; |
| } |
| |
| protected: |
| // overrides from SkEventSink |
| virtual bool onQuery(SkEvent* evt) { |
| if (SampleCode::TitleQ(*evt)) { |
| SampleCode::TitleR(evt, "Draw"); |
| return true; |
| } |
| return this->INHERITED::onQuery(evt); |
| } |
| |
| void drawBG(SkCanvas* canvas) { |
| canvas->drawColor(0xFFDDDDDD); |
| // canvas->drawColor(SK_ColorWHITE); |
| } |
| |
| virtual void onDraw(SkCanvas* canvas) { |
| this->drawBG(canvas); |
| test_clearonlayers(canvas); return; |
| // test_strokerect(canvas); return; |
| |
| for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
| (*iter)->draw(canvas); |
| } |
| if (fDraw) { |
| fDraw->draw(canvas); |
| } |
| } |
| |
| virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { |
| for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
| (*iter)->setSelected(false); |
| } |
| |
| Click* c = new Click(this); |
| Draw* d = this->hitTestList(x, y); |
| if (d) { |
| d->setSelected(true); |
| c->setType("dragger"); |
| } else { |
| c->setType("maker"); |
| } |
| return c; |
| } |
| |
| virtual bool onClick(Click* click) { |
| if (Click::kUp_State == click->fState) { |
| if (click->isType("maker")) { |
| if (SkPoint::Distance(click->fOrig, click->fCurr) > SkIntToScalar(3)) { |
| *fList.append() = fDraw; |
| } else { |
| fDraw->unref(); |
| } |
| fDraw = NULL; |
| } |
| return true; |
| } |
| |
| if (Click::kDown_State == click->fState) { |
| SkPaint p = fFactory->getPaint(); |
| p.setColor(this->randColor()); |
| fFactory->setPaint(p); |
| } |
| |
| if (click->isType("maker")) { |
| this->setDraw(fFactory->create(click->fOrig, click->fCurr))->unref(); |
| } else if (click->isType("dragger")) { |
| for (Draw** iter = fList.begin(); iter < fList.end(); iter++) { |
| if ((*iter)->isSelected()) { |
| (*iter)->offset(click->fCurr.x() - click->fPrev.x(), |
| click->fCurr.y() - click->fPrev.y()); |
| } |
| } |
| } |
| this->inval(NULL); |
| return true; |
| } |
| |
| private: |
| typedef SkView INHERITED; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| static SkView* MyFactory() { return new DrawView; } |
| static SkViewRegister reg(MyFactory); |
| |