I have this drawer I learned to make on youtube
https://www.youtube.com/watch?v=JLICaBEiJS0&list=PLQkwcJG4YTCSpJ2NLhDTHhi6XBNfk9WiC&index=31
Philipp Lackner
I want to add the drawer to my app which has multiple screens and some of them don’t need the drawer so I implemented navigation with screens , and some of the screens need to also have the drawer ontop of them wrap them.
this is the code of the drawer
val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
drawerGesturesEnabled = scaffoldState.drawerState.isOpen,
scaffoldState = scaffoldState, topBar = {
AppBar(onNavigationIconClick = {
scope.launch {
scaffoldState.drawerState.open()
}
})
}, drawerContent = {
DrawerHeader()
DrawerBody(items = listOf(
MenuItem(
id = "home",
title = "Home",
contentDescription = "Go to home screen",
icon = Icons.Default.Home
),
MenuItem(
id = "settings",
title = "Settings",
contentDescription = "Go to Settings screen",
icon = Icons.Default.Settings
),
MenuItem(
id = "help",
title = "Help",
contentDescription = "Go to help screen",
icon = Icons.Default.Info
),
), onItemClick = {
println("Clicked on ${it.title}")
when (it.id) {
"home" -> {
println("Clicked on ${it.title}")
}
"settings" -> {
println("Clicked on ${it.title}")
}
"help" -> {
println("Clicked on ${it.title}")
}
}
})
}) {
Text(text = "Hello World")
}
the Text = Hellow world is where I want to pass my parameter of the screen which I don’t know how to do it. I want to add a parameter that takes a composable function and runs it inside
and I followed this navigation video on how to navigate in kotlin
https://www.youtube.com/watch?v=4gUeyNkGE3g&list=PLQkwcJG4YTCSpJ2NLhDTHhi6XBNfk9WiC&index=18
which has 3 big files so if you ask I post them here but I will try to be more specific about what is needed
composable(route = Screen.RegisterScreen.route) {
RegisterScreen(navController = navCotroller)
}
and if I put the code in the drawer it works well but I want to split the code to be cleaner because I use the drawer in more places
the code work like the example bellow
composable(route = Screen.PreferenceScreen.route) {
val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
drawerGesturesEnabled = scaffoldState.drawerState.isOpen,
scaffoldState = scaffoldState,
topBar = {
AppBar(onNavigationIconClick = {
scope.launch {
scaffoldState.drawerState.open()
}
})
},
drawerContent = {
DrawerHeader()
DrawerBody(items = listOf(
MenuItem(
id = "swipe",
title = "Swipe",
contentDescription = "Go to Swipe screen",
icon = Icons.Default.Home
),
MenuItem(
id = "settings",
title = "Settings",
contentDescription = "Go to Settings screen",
icon = Icons.Default.Settings
),
MenuItem(
id = "profile",
title = "Profile",
contentDescription = "Go to profile screen",
icon = Icons.Default.Info
),
), onItemClick = {
when (it.id) {
"swipe" -> {
navCotroller.navigate(Screen.SwipeScreen.route)
}
"settings" -> {
navCotroller.navigate(Screen.PreferenceScreen.route)
}
"profile" -> {
navCotroller.navigate(Screen.CelebProfileScreen.route)
}
}
})
}) {
-----> PreferenceScreen(navController = navCotroller)
}
}
but it is not clean code!! how can I use a function pointer to make this work ??
>Solution :
I can’t compile your code and I’m not sure if this will solve your issue, but based on this
… I want to add a parameter that takes a composable function and runs
it inside
You can use this as a reference. Consider this composable that takes any composable and runs it inside
@Composable
fun AnyComposable(
anyComposable: @Composable () -> Unit
) {
anyComposable()
}
And another composable that uses the composable above and passes any other composable to it like this
@Composable
fun MyScreen() {
// big red Box composable
val composable1 = @Composable {
Box (
modifier = Modifier
.size(200.dp)
.background(Color.Red)
)
}
// small blue Box composable
val composable2 = @Composable {
Box(
modifier = Modifier
.size(80.dp)
.background(Color.Blue)
)
}
// small green rectangular Box composable
val composable3 = @Composable {
Box(
modifier = Modifier
.size(width = 100.dp, height = 30.dp)
.background(Color.Green)
)
}
var dynamicComposable by remember { mutableStateOf<@Composable () -> Unit> (@Composable { composable1() }) }
Column(
modifier = Modifier.fillMaxSize(),
horizontalAlignment = Alignment.CenterHorizontally
) {
Row(
modifier = Modifier.fillMaxWidth(),
verticalAlignment = Alignment.CenterVertically,
horizontalArrangement = Arrangement.SpaceBetween
) {
Button(onClick = {
dynamicComposable = composable1
}) {
Text("Comp 1")
}
Button(onClick = {
dynamicComposable = composable2
}) {
Text("Comp 2")
}
Button(onClick = {
dynamicComposable = composable3
}) {
Text("Comp 3")
}
}
AnyComposable {
dynamicComposable()
}
}
}
and the output:
