Could someone please hint on how to build a list that allows

Question

Could someone please hint on how to build a list that allows multiple selection of items Here is what I have so far ``` Composable fun ThirdRow currentPos Int checksums List lt String gt val items = if checksums isNotEmpty df getFiles checksums currentPos else emptyList LazyColumnFor items modifier = Modifier fillMaxSize padding 8 dp itemContent = item gt ListItem text = Text item parent secondaryText = Text item name ```

jim · Answer

``` Composable fun ThirdRow currentPos Int checksums List lt String gt selected Set lt String gt onSelectionToggled String gt Unit val items = if checksums isNotEmpty df getFiles checksums currentPos else emptyList LazyColumnFor items modifier = Modifier fillMaxSize padding 8 dp itemContent = item gt if selected contains item checksum else TODO Add a click handler that will invoke onSelectionToggled item checksum when selection is toggled ListItem text = Text item parent secondaryText = Text item name ```

Dominaezzz · Answer

`Modifier toggleable `

Thomas · Answer

Thanks for answering Now I do this one ``` Composable fun ThirdRow currentPos Int checksums List lt String gt selected SnapshotStateMap lt Int Boolean gt val items = if checksums isNotEmpty df getFiles checksums currentPos else emptyList LazyColumnForIndexed items modifier = Modifier fillMaxSize padding 8 dp itemContent = index item gt val current = selected index false ListItem secondaryText = Text item parent modifier = Modifier toggleable onValueChange = selected index = current value = current background if current Color LightGray else Color Transparent text = Text item name ``` Works great But still pondering if there isn t more builtin support in Compose Again thank you very much for helping with this one

Dominaezzz · Answer

What do you mean by more built in `Modifier toggleable ` is built in

jim · Answer

I think he is looking for a built in multi select column widget Under this assumption no I don t think there is anything more built in but the solution here is just a few lines of code Often generalized solutions to problems like this end up adding more cognitive overhead to learn+use than to just re implementing when needed but if you create a generalization of this that you think would be useful to other people feel free to share on github or maven

Thomas · Answer

To explain I am afraid I still am way too influenced by imperative UI frameworks grinning Consider Swing there is ListSelectionModel and stuff like that I need to leave this behind grinning Thanks for helping me sorting this out