CubicCurve2Slide Class Reference

Inheritance diagram for CubicCurve2Slide:

Public Member Functions
	CubicCurve2Slide ()
bool	onChar (SkUnichar uni) override
void	draw (SkCanvas *canvas) override
Public Member Functions inherited from ClickHandlerSlide
bool	onMouse (SkScalar x, SkScalar y, skui::InputState clickState, skui::ModifierKey modifierKeys) final
Public Member Functions inherited from Slide
virtual SkISize	getDimensions () const
virtual void	gpuTeardown ()
virtual void	draw (SkCanvas *canvas)=0
virtual bool	animate (double nanos)
virtual void	load (SkScalar winWidth, SkScalar winHeight)
virtual void	resize (SkScalar winWidth, SkScalar winHeight)
virtual void	unload ()
virtual bool	onChar (SkUnichar c)
virtual bool	onMouse (SkScalar x, SkScalar y, skui::InputState state, skui::ModifierKey modifiers)
virtual bool	onGetControls (SkMetaData *)
virtual void	onSetControls (const SkMetaData &)
const SkString &	getName ()
Public Member Functions inherited from SkRefCntBase
	SkRefCntBase ()
virtual	~SkRefCntBase ()
bool	unique () const
void	ref () const
void	unref () const

Static Public Member Functions
static void	Dot (SkCanvas *canvas, SkPoint p, SkScalar radius, SkColor c)

Protected Member Functions
Click *	onFindClickHandler (SkScalar x, SkScalar y, skui::ModifierKey modi) override
bool	onClick (ClickHandlerSlide::Click *) override
virtual Click *	onFindClickHandler (SkScalar x, SkScalar y, skui::ModifierKey modi)=0
virtual bool	onClick (Click *)=0

Additional Inherited Members
Protected Attributes inherited from Slide
SkString	fName

Detailed Description

Definition at line 546 of file PathSlide.cpp.

Constructor & Destructor Documentation

CubicCurve2Slide()

CubicCurve2Slide::CubicCurve2Slide ( )

inline

Definition at line 559 of file PathSlide.cpp.

                       {
        fPts[0] = { 90, 300 };
        fPts[1] = { 30, 60 };
        fPts[2] = { 250, 30 };
        fPts[3] = { 350, 200 };
 
        fQuad[0] = fPts[0] + SkVector{ 300, 0};
        fQuad[1] = fPts[1] + SkVector{ 300, 0};
        fQuad[2] = fPts[2] + SkVector{ 300, 0};
 
        fName = "CubicCurve2";
    }

Member Function Documentation

Dot()

static void CubicCurve2Slide::Dot ( SkCanvas *  canvas, SkPoint  p, SkScalar  radius, SkColor  c  )

inlinestatic

Definition at line 585 of file PathSlide.cpp.

                                                                             {
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setColor(c);
        canvas->drawCircle(p.fX, p.fY, radius, paint);
    }

draw()

void CubicCurve2Slide::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 592 of file PathSlide.cpp.

                                         {
        SkPaint paint;
        paint.setAntiAlias(true);
 
        {
            paint.setStyle(SkPaint::kStroke_Style);
            SkPath path;
            path.moveTo(fPts[0]);
            path.cubicTo(fPts[1], fPts[2], fPts[3]);
            path.moveTo(fQuad[0]);
            path.quadTo(fQuad[1], fQuad[2]);
            canvas->drawPath(path, paint);
        }
 
        if (fShowSub) {
            paint.setColor(SK_ColorRED);
            paint.setStrokeWidth(1.7f);
            this->showFrame(canvas, fPts, 3, paint);
            this->showFrame(canvas, fQuad, 2, paint);
 
            paint.setColor(SK_ColorBLACK);
            paint.setStyle(SkPaint::kFill_Style);
            SkFont font(ToolUtils::DefaultTypeface(), 20);
            canvas->drawString(SkStringPrintf("t = %g", fT), 20, 20, font, paint);
        }
 
        if (fShowFlatness) {
            this->showFlattness(canvas);
        }
 
        if (fShowInnerQuads) {
            this->showInnerQuads(canvas);
        }
 
        paint.setColor(SK_ColorGRAY);
        paint.setStroke(true);
        canvas->drawPath(SkPathBuilder().addPolygon(fPts, 4, false).detach(), paint);
        canvas->drawPath(SkPathBuilder().addPolygon(fQuad, 3, false).detach(), paint);
 
        for (SkPoint p : fPts) {
            Dot(canvas, p, 7, SK_ColorBLACK);
        }
 
        if ((false)) {
            SkScalar ts[2];
            int n = SkFindCubicInflections(fPts, ts);
            for (int i = 0; i < n; ++i) {
                SkPoint p;
                SkEvalCubicAt(fPts, ts[i], &p, nullptr, nullptr);
                canvas->drawCircle(p.fX, p.fY, 3, paint);
            }
        }
 
    }

onChar()

bool CubicCurve2Slide::onChar ( SkUnichar  uni )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 572 of file PathSlide.cpp.

                                        {
            switch (uni) {
                case 's': fShowSub = !fShowSub; break;
                case 'f': fShowFlatness = !fShowFlatness; break;
                case '-': fT -= 1.0f / 32; break;
                case '=': fT += 1.0f / 32; break;
                case 'q': fShowInnerQuads = !fShowInnerQuads; break;
                default: return false;
            }
            fT = std::min(1.0f, std::max(0.0f, fT));
            return true;
    }

onClick()

bool CubicCurve2Slide::onClick ( ClickHandlerSlide::Click *  )

inlineoverrideprotectedvirtual

Override to track clicks. Return true as long as you want to track the pen/mouse.

Implements ClickHandlerSlide.

Definition at line 662 of file PathSlide.cpp.

{ return false; }

onFindClickHandler()

Click * CubicCurve2Slide::onFindClickHandler ( SkScalar  x, SkScalar  y, skui::ModifierKey  modi  )

inlineoverrideprotectedvirtual

Return a Click object to handle the click. onClick will be called repeatedly with the latest mouse state tracked on the Click object until it returns false.

Implements ClickHandlerSlide.

Definition at line 648 of file PathSlide.cpp.

                                                                                     {
        const SkScalar tol = 8;
        const SkRect r = SkRect::MakeXYWH(x - tol, y - tol, tol * 2, tol * 2);
        for (int i = 0; i < N; ++i) {
            if (r.intersects(SkRect::MakeXYWH(fPts[i].fX, fPts[i].fY, 1, 1))) {
                return new Click([this, i](Click* c) {
                    fPts[i] = c->fCurr;
                    return true;
                });
            }
        }
        return nullptr;
    }

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The documentation for this class was generated from the following file:

• third_party/skia/tools/viewer/PathSlide.cpp