What is the official name of these `@Composable` f...

# compose

[Michal Bacik]

What is the official name of these @Composable functions (or result that they create on UI tree)?
Widget, node, component or else?

[Luca Nicoletti]

ComponentNode?

[jim]

I've been calling them "composables" (short for composable functions). I've also seen the terms "widget" and "component" used.

[jim]

Node is probably more often used to describe the emittables (leaf nodes of a call tree) lower down in the Compose tech stack, so I personally/internally probably wouldn't use that word to describe the composables that users would see/use.

[Luca Nicoletti]

I was addressing the result that they create on UI tree part 😛

[Michal Bacik]

I preffer Widget. But creators should decide, also for sake of future documentation.

[jim]

Haha, well, in that case, emittable or node is perfectly reasonable 🙂

[jim]

@Michal Bacik Well, I frequently use widget in conversation, so yeah, that's a fine word too.

[Luca Nicoletti]

Someone here in the channel (🧌 ) doesn’t like more than 1 way to address things, so, first thing first: set a name and make it const val

[Michal Bacik]

@Luca Nicoletti Absolutely agree. We all know what View is, so it should be crystal clear what single item is in Compose UI.

[Luca Nicoletti]

If you refer to the code, then Emittable and its implementations are what you’re looking for

[Luca Nicoletti]

I was trolling 🧌, I’m fine with being able to address to them with different names

[Pablichjenkov]

May I ask what is emitted in this case?
is it drawing commands to the GPU?

[Michal Bacik]

@Luca Nicoletti I don't mean how actual implementation class is named, we don't ever meet Emittable. We're given @Composable annotation, that's all that is common for these "widgets".

[Michal Bacik]

@Pablichjenkov I'm not sure if these widgets are directly using GPU. They get chance to draw to Canvas, actually clipped rectangle on it. The Canvas is as big as the activity window. Or not?

[jim]

@Pablichjenkov Compose bottoms out at Emittables, which are base nodes in the given view system. For example, Compose will bottom out when it hits an AndroidView (like a WebView or ViewGroup) in the hierarchy. It will also bottom out when it hits a LayoutNode (which is a ComponentNode) that ComposeUI uses to determine positioning and clipping information.

[Leland Richardson [G]]

compose UI’s emittables are ComponentNode and its subclasses

[Leland Richardson [G]]

and fwiw, i’ve been trying to use “composable” or “composable function” when describing composable functions

[Leland Richardson [G]]

“component” is also a term i find myself using a lot, mostly due to its relation to “react component” and i think it’s a reasonable vernacular depending on who you’re talking to

[Pablichjenkov]

ComponentNode 🤔 interesting. Thank you all.
Is there any documentation about how the measurement and layout of these Nodes work yet?
Just for general culture.

[Leland Richardson [G]]

check out Layout.kt and corresponding documentation on DAC

[Pablichjenkov]

Thanks one more time

[Fudge]

Someone here in the channel (🧌 ) doesn’t like more than 1 way to address things, so, first thing first: set a name and make it const val

It’s nice to know my principles are holding up.
There should be an agreed way to address it.
Widget is for Flutter , Component is for react, composable has too many syllables, so there isn’t a best answer I can suggest though.

[Fudge]

If you would press me against a wall I would say component

[Pablichjenkov]

But then it will remind you of React. Emittable sounds very streamish. Still open in the air 😸

[Leland Richardson [G]]

i am loving the snark that is emerging out of this slack channel lol

[Leland Richardson [G]]

Emittable is a specific term that is distinct from composable functions

[Leland Richardson [G]]

it means the elements of the actual tree that compose builds

[Leland Richardson [G]]

and a @Composable function is not one of those elements, so Emittable isn’t up for grabs here

[Pablichjenkov]

Composable fair enough.

[romainguy]

@jim @Leland Richardson [G] Widget is already too overloaded on Android

[Luca Nicoletti]

View 🧌

[Michal Bacik]

Compo 🙂