jetpack compose - Open close drawer in code

MainActivity.kt

package com.cfsuman.jetpackcompose

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.shape.CutCornerShape
import androidx.compose.material.*
import androidx.compose.runtime.*
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.*
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp
import kotlinx.coroutines.launch


class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            GetScaffold()
        }
    }


    @Composable
    fun GetScaffold(){
        val scaffoldState: ScaffoldState = rememberScaffoldState(
            rememberDrawerState(DrawerValue.Closed)
        )

        Scaffold(
            scaffoldState = scaffoldState,
            topBar = { TopAppBarContent(scaffoldState) },
            content = {MainContent(scaffoldState)},
            backgroundColor = Color(0xFFEDEAE0),
            drawerContent = {DrawerContent(scaffoldState)},
            drawerBackgroundColor = Color(0xFFF0F8FF),
            drawerScrimColor = Color(0XFFFAE7B5),
            drawerContentColor = Color(0xFF0048BA),
            drawerShape = CutCornerShape(
                topEnd = 45.dp,
                bottomEnd = 45.dp
            )
        )
    }


    @Composable
    fun DrawerContent(scaffoldState: ScaffoldState){
        val scope = rememberCoroutineScope()
        Box(
            modifier = Modifier.padding(12.dp),
            contentAlignment = Alignment.TopCenter
        ) {
            TextButton(onClick = {
                scope.launch{
                    scaffoldState.drawerState.close()
                }
            }) {
                Text(text = "Close Drawer")
            }
        }
    }


    @Composable
    fun TopAppBarContent(scaffoldState: ScaffoldState) {
        val scope = rememberCoroutineScope()
        TopAppBar(
            title = { Text(text = "Compose - Open Close Drawer")},
            backgroundColor = Color(0xFFC0E8D5),

            navigationIcon = {
                IconButton(onClick = {
                    scope.launch{
                        scaffoldState.drawerState.open()
                    }
                }) {
                    Icon(
                        Icons.Filled.Menu,
                        contentDescription = "Localized description"
                    )
                }
            }
        )
    }


    @Composable
    fun MainContent(scaffoldState: ScaffoldState){
        val scope = rememberCoroutineScope()
        Box(
            modifier = Modifier.fillMaxSize(),
            contentAlignment = Alignment.Center
        ){
            Button(onClick = {
                scope.launch{
                    scaffoldState.drawerState.open()
                }
            }) {
                Text(text = "Open Drawer")
            }
        }
    }


    @Preview
    @Composable
    fun ComposablePreview(){
        //GetScaffold()
    }
}