StringArtSlide Class Reference

Inheritance diagram for StringArtSlide:

Public Member Functions
	StringArtSlide ()
void	load (SkScalar w, SkScalar h) override
void	resize (SkScalar w, SkScalar h) 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 bool	animate (double nanos)
virtual void	unload ()
virtual bool	onChar (SkUnichar c)
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

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

Additional Inherited Members
Protected Attributes inherited from Slide
SkString	fName

Detailed Description

Definition at line 18 of file StringArtSlide.cpp.

Constructor & Destructor Documentation

StringArtSlide()

StringArtSlide::StringArtSlide ( )

inline

Definition at line 20 of file StringArtSlide.cpp.

: fAngle(0.305f) { fName = "StringArt"; }

Member Function Documentation

draw()

void StringArtSlide::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 26 of file StringArtSlide.cpp.

                                         {
        SkScalar angle = fAngle*SK_ScalarPI + SkScalarHalf(SK_ScalarPI);
 
        SkPoint center = SkPoint::Make(fSize.width()/2, fSize.height()/2);
        SkScalar length = 5;
        SkScalar step = angle;
 
        SkPath path;
        path.moveTo(center);
 
        while (length < (std::min(fSize.width(), fSize.height())/2 - 10.f))
        {
            SkPoint rp = SkPoint::Make(length*SkScalarCos(step) + center.fX,
                                       length*SkScalarSin(step) + center.fY);
            path.lineTo(rp);
            length += angle / SkScalarHalf(SK_ScalarPI);
            step += angle;
        }
        path.close();
 
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setStyle(SkPaint::kStroke_Style);
        paint.setColor(0xFF007700);
 
        canvas->drawPath(path, paint);
    }

load()

void StringArtSlide::load ( SkScalar  w, SkScalar  h  )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 22 of file StringArtSlide.cpp.

{ fSize = {w, h}; }

onClick()

bool StringArtSlide::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 60 of file StringArtSlide.cpp.

{ return false; }

onFindClickHandler()

Click * StringArtSlide::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 55 of file StringArtSlide.cpp.

                                                                                {
        fAngle = x/fSize.width();
        return nullptr;
    }

resize()

void StringArtSlide::resize ( SkScalar  w, SkScalar  h  )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 24 of file StringArtSlide.cpp.

{ fSize = {w, h}; }

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

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