HalfPlaneSlide2 Class Reference

Inheritance diagram for HalfPlaneSlide2:

Public Member Functions
	HalfPlaneSlide2 ()
void	load (SkScalar w, SkScalar h) override
void	draw (SkCanvas *canvas) override
Click *	onFindClickHandler (SkScalar x, SkScalar y, skui::ModifierKey modi) override
bool	onClick (Click *click) 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

Additional Inherited Members
virtual Click *	onFindClickHandler (SkScalar x, SkScalar y, skui::ModifierKey modi)=0
virtual bool	onClick (Click *)=0
Protected Attributes inherited from Slide
SkString	fName

Detailed Description

Definition at line 360 of file ClipSlide.cpp.

Constructor & Destructor Documentation

HalfPlaneSlide2()

HalfPlaneSlide2::HalfPlaneSlide2 ( )

inline

Definition at line 365 of file ClipSlide.cpp.

{ fName = "halfplane2"; }

Member Function Documentation

draw()

void HalfPlaneSlide2::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 373 of file ClipSlide.cpp.

                                         {
        SkMatrix mx;
        {
            SkRect r = fPath.getBounds();
            SkPoint src[4];
            r.toQuad(src);
            mx.setPolyToPoly(src, fPts, 4);
        }
 
        SkPaint paint;
        canvas->drawPath(fPath, paint);
 
        canvas->save();
        canvas->concat(mx);
        paint.setColor(0x40FF0000);
        canvas->drawPath(fPath, paint);
        canvas->restore();
 
        // draw the frame
        paint.setStrokeWidth(10);
        paint.setColor(SK_ColorGREEN);
        canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, fPts, paint);
 
        // draw the half-planes
        SkHalfPlane planes[4];
        compute_half_planes(mx, 400, 400, planes);
        for (auto& p : planes) {
            draw_halfplane(canvas, p, SK_ColorRED);
        }
    }

load()

void HalfPlaneSlide2::load ( SkScalar  w, SkScalar  h  )

inlineoverridevirtual

Reimplemented from Slide.

Definition at line 367 of file ClipSlide.cpp.

                                               {
        fPath = make_path();
        SkRect r = fPath.getBounds();
        r.toQuad(fPts);
    }

onClick()

bool HalfPlaneSlide2::onClick ( Click *  )

inlineoverridevirtual

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

Implements ClickHandlerSlide.

Definition at line 417 of file ClipSlide.cpp.

                                        {
        int32_t index;
        SkAssertResult(click->fMeta.findS32("index", &index));
        SkASSERT(index >= 0 && index < 4);
        fPts[index] = click->fCurr;
        return true;
    }

onFindClickHandler()

Click * HalfPlaneSlide2::onFindClickHandler ( SkScalar  x, SkScalar  y, skui::ModifierKey  modi  )

inlineoverridevirtual

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 404 of file ClipSlide.cpp.

                                                                                     {
        SkScalar r = 8;
        SkRect rect = SkRect::MakeXYWH(x - r, y - r, 2*r, 2*r);
        for (int i = 0; i < 4; ++i) {
            if (rect.contains(fPts[i].fX, fPts[i].fY)) {
                Click* c = new Click;
                c->fMeta.setS32("index", i);
                return c;
            }
        }
        return nullptr;
    }

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

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