kotlinlang #compose

, however the shadow is not displayed. If i add some bottom padding to the Surface, then it shows... but... why is that? shouldn't shadow draw over other elements?

Bradleycorn

09/09/2021, 3:15 PM

is there a way to focus a composable (specifically a TextField) in a

@Preview

? I tried adding a focus requester and requesting focus in a DisposableEffect, but as I suspected, no luck.

Rick Regan

09/09/2021, 3:56 PM

I am using Preferences DataStore and a

LaunchedEffect

in my top-level composable to read in app preferences. I have hardcoded defaults for the preferences so that my UI can initially compose. When the stored preferences are loaded, the UI recomposes to match them. This happens quickly, but it's noticeable. I was hoping there was a way to skip right to the stored preferences based composition, i.e., delaying startup composition until the preferences are loaded.

rajesh

09/09/2021, 5:42 PM

I'm using

LazyVerticalGrid

to loading images. If there's any error while decoding image bitmap, it shouldn't be loaded (as per code in thread), but

LazyVerticalGrid

is using empty cell (shown in image) instead of avoiding that item. what should i do to resolve it?

Ash

09/09/2021, 10:33 PM

Teaching Compose to designers. Do we have a drag/drop tool -/- GUI UI builders for Compose?

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darkmoon_uk

09/10/2021, 3:11 AM

❓ "How can we guarantee that
@Preview
annotated functions do not end up in production code?" ☝️ This came as a fair challenge from within our team today. I'm working in an environment where adherence to architectural layers, and guaranteed correctness is paramount. As such, it was fairly pointed out that

@Preview

functions strictly belong in a different place to production code. There's an obvious tension there between architectural purity and the practical benefits of placing them alongside `@Composable`'s (such as the intent behind the Code / Split / Design pane). We've arrived at a place where it's deemed acceptable as long as we have a way of guaranteeing that

@Preview

annotated functions cannot accidentally make it into a Release build (either as live or dead code). Do any easily configurable means exist today? If not, could we implement something using the recently released KSP?

K Merle

09/10/2021, 7:48 AM

Should I use inline function instead of regular function?

@Composable
fun <T : FilterModel> FilterScreen(
    listResult: Result<List<T>>,
    filteredList: (list: List<T>) -> List<T>,
    onItemSelect: (T) -> Unit,
    navigate: () -> Unit
)

Peter Mandeljc

09/10/2021, 9:31 AM

how would one override back behavior for specific navigation destination? For example, if I have destination A,B,C,D, I would like for D to always pop back to A, given that you can navigate to D from A,B,C.

myanmarking

09/10/2021, 9:38 AM

I am reading dominat color using palette from an image. I want to place a background with that color, and text inside. How can i check if the color is predominantly light/dark so i can change textColor to white/black. Is there any build-in feature for this ?

Jeff

09/10/2021, 10:16 AM

I can't seem to get the text to the middle of the circle shape. Code in thread 🧵

shahroz

09/10/2021, 11:22 AM

In navigation component, when i navigate to different composable. My previous composable is still observing state changes. Shouldn't the scope of the composable stop observing?

adjpd

09/10/2021, 11:32 AM

In Android Studio, the documentation samples are unresolved. Is there something I can do to resolve them?

🇳🇴 3

Стоян Тинчев

09/10/2021, 12:00 PM

I want to create an application that is like google calendar one day view. So I have a scroll state for different hours in a day and one line that represents the current time. This line is created with Stateflow and it is dynamic. I want the following user experience with the latter: • when the app is launched to scroll directly to that line • when the user scrolls down or up - at a certain time this line to be focused again How can I achieve it? Currently app looks like below pictures(in the second is the suspect line):

:thread-please: 3

🧵 2

Zoltan Demant

09/10/2021, 12:39 PM

Is there a sensible way to support a smaller

TextField

(width) than the material design one? 🧵👀

Dylan

09/10/2021, 2:13 PM

Hey there, I'm trying to sync the elevation of a

TopAppBar

based on the scroll position within a

LazyList

. The

TopAppBar

is within a

Scaffold

, and the Scaffold content is a

NavGraph

. This NavGraph contains a composable which contains my LazyList. I tried to do it by creating an

AppBarState

which holds the current elevation as a

MutableState<Float>

and also the elevationRange (

0f..4f

). I also created a

LocalAppBarState

which holds the current

AppBarState

. The elevation of my

TopAppBar

is defined using

LocalAppBarState.current.elevation.dp

. To define the elevation I created a composable that return a

LazyListState

. It uses the

LocalAppBarState

to define the calculated elevation based on the

LazyListState

. Unfortunately, doing this cause my app to lag when scrolling. But I'm not sure I know any other way to do it. I read some things about

Modifier.graphicsLayer

, but even after trying that the issue remains the same. Is there a better way to do it? I will leave as the first comment in this thread the code for all of that.

myanmarking

09/10/2021, 2:17 PM

With a List of Items, whats the best practice to remember if specific item is expanded or not ? Item internal state =?

ste

09/10/2021, 2:18 PM

is there a built-in

Modifier

that disables any gesture detection of its children? I don't want children to override gestures of their parents

👀 3

myanmarking

09/10/2021, 3:23 PM

how can i align the text vertically ?

georgiy.shur

09/10/2021, 3:48 PM

I’m having problems using Hilt injection into custom Compose view. I’m using this as an entry point.

@AndroidEntryPoint
class CustomComposeView(context: Context) 
    : AbstractComposeView(context, null, 0)

But I’m getting an error:

The base class, 'androidx.compose.ui.platform.AbstractComposeView', of the @AndroidEntryPoint, 'com.example.CustomComposeView', contains a constructor with default parameters. This is currently not supported by the Gradle plugin. Either specify the base class as described at <https://dagger.dev/hilt/gradle-setup#why-use-the-plugin> or remove the default value declaration.

I cannot modify the base class because I don’t own it and I don’t understand where should I specify the base class. Any ideas?

myanmarking

09/10/2021, 3:56 PM

is there any example how to go about collapsing header + sticky toolbar ? I manager to implement parallax looking at some samples, but i cannot quite grasp how to make the toolbar not scroll past the top screen

👍 1

Justin Yue

09/10/2021, 5:03 PM

I'm currently working on conditional navigation where if the user is not logged in, the app navigates to the authentication screen. Currently, I place this conditional navigation logic in a

launchedEffect

of my main screen, but the app then momentarily shows the main screen before navigating to the auth screen if no user is logged in. I would like to remove the delay in navigating to the auth screen. I'm not entirely sure if using

launchedEffect

in this case is best practice too.

Waqas Tahir

09/10/2021, 5:07 PM

I want to create a text field with line numbers , is there any way I could do this , I don't want to use multiple text fields

myanmarking

09/10/2021, 5:28 PM

is there any way of knowing the total scroll from LazyListState ?

brabo-hi

09/10/2021, 5:33 PM

hi all, when navigating from A to B, what is the best way to return data back from B to A when B finishes?

Vinícius Santos

09/10/2021, 5:39 PM

Hey there I'm working on a project with feature modules and compose navigation, I've been searching for approaches using compose navigation but all of them seems to centralize navigation in a single spot and I was wondering, is there any way I can have multiple independent graphs just like we already have with jetpack navigation nested graphs?

Bradleycorn

09/10/2021, 8:10 PM

Has anyone built a

TextField

composable with masking/formatting of input (for example to format a phone number or date)?

rajesh

09/10/2021, 9:19 PM

I've Boolean variable in child composable which I want to reassign from parent composable. How do I do that? Tried state hoisting but that didn't worked.

josefdolezal

09/10/2021, 10:09 PM

Hello all! 👋 Could you point me to the right direction with animating position of composable? I am trying to animate text and it’s position based on

isLoading

variable alongside animating progress indicator’s visibility

Screen Recording 2021-09-11 at 0.02.05.mov

Tash

09/10/2021, 10:15 PM

Is it possible to unit test models and classes that define

mutableStateOf

s or other snapshot state APIs outside of an Android integration test? We are defining some models with snapshot state APIs that we would like to just have unit tests for, since we don’t have CI infra set up for Android integration tests.

Sergey Y.

09/10/2021, 10:28 PM

Some fun with Compose and Raycasting 👀 😄 WIP

device-2021-09-11-011857.mp4

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Title

Sergey Y.

09/10/2021, 10:28 PM

Some fun with Compose and Raycasting 👀 😄 WIP

device-2021-09-11-011857.mp4

👏🏼 1

😮 15

👏 16

👏🏽 1

👏🏻 2

andrew

09/11/2021, 4:59 PM

That's pretty nifty, almost reminds me of the fluent ui lighting model a bit

Sergey Y.

09/13/2021, 12:00 AM

@andrew Thanks. I continue to work on this. I'm not sure how this will end, but I find the process amusing. The latest progress https://twitter.com/desugar_s/status/1437171470061420549

andrew

09/13/2021, 1:09 AM

WOW! That's cool! 😎

Do you plan on open sourcing it?

Sergey Y.

09/13/2021, 6:50 PM

Of course, at some point. But nothing special there, the code is a bit messy and not optimized.

andrew

09/19/2021, 6:34 PM

That's fair, still though, neat stuff!

Curious to see what comes out of it next haha

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