SGSlide Class Reference

Inheritance diagram for SGSlide:

Public Member Functions
	SGSlide ()
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	load (SkScalar winWidth, SkScalar winHeight)
virtual void	resize (SkScalar winWidth, SkScalar winHeight)
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 modi) override
bool	onClick (Click *click) override

Additional Inherited Members
Protected Attributes inherited from Slide
SkString	fName

Detailed Description

Definition at line 29 of file SGSlide.cpp.

Constructor & Destructor Documentation

SGSlide()

SGSlide::SGSlide ( )

inline

Definition at line 53 of file SGSlide.cpp.

              {
        fGroup = sksg::Group::Make();
 
        fScene = sksg::Scene::Make(fGroup);
 
        auto r = sksg::Rect::Make({20, 20, 400, 300});
        auto p = sksg::Color::Make(SK_ColorRED);
        auto d = sksg::Draw::Make(r, p);
        this->appendNode(d, r, p);
 
        r = sksg::Rect::Make({60, 70, 300, 400});
        p = sksg::Color::Make(SK_ColorBLUE);
        d = sksg::Draw::Make(r, p);
        this->appendNode(d, r, p);
        fName = "SceneGraph";
    }

Member Function Documentation

draw()

void SGSlide::draw ( SkCanvas *  canvas )

inlineoverridevirtual

Implements Slide.

Definition at line 70 of file SGSlide.cpp.

                                         {
        fScene->render(canvas);
    }

onClick()

bool SGSlide::onClick ( Click *  )

inlineoverrideprotectedvirtual

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

Implements ClickHandlerSlide.

Definition at line 84 of file SGSlide.cpp.

                                        {
        sksg::Draw* node = nullptr;
        if (click->fMeta.findPtr("node", (void**)&node)) {
            if (auto info = this->findInfo(node)) {
                auto geo = info->fGeo;
                sksg::Rect* r = (sksg::Rect*)geo;
                SkScalar dx = click->fCurr.fX - click->fPrev.fX;
                SkScalar dy = click->fCurr.fY - click->fPrev.fY;
                r->setL(r->getL() + dx);
                r->setR(r->getR() + dx);
                r->setT(r->getT() + dy);
                r->setB(r->getB() + dy);
            }
            return true;
        }
        return false;
    }

onFindClickHandler()

Click * SGSlide::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 75 of file SGSlide.cpp.

                                                                                     {
        if (auto node = fScene->nodeAt({x, y})) {
            Click* click = new Click();
            click->fMeta.setPtr("node", (void*)node);
            return click;
        }
        return nullptr;
    }

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

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