Start work on building the LoginActivity

app/src/main/java/eu/steffo/twom/ui/BASE_PADDING.kt

@@ -0,0 +1,8 @@
+package eu.steffo.twom.ui
+
+import androidx.compose.foundation.layout.padding
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+
+
+val BASE_PADDING = Modifier.padding(all = 10.dp)

app/src/main/java/eu/steffo/twom/ui/homeserver/SelectHomeserverControl.kt

@@ -20,6 +20,7 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import eu.steffo.twom.R
 import eu.steffo.twom.matrix.TwoMMatrix
+import eu.steffo.twom.ui.BASE_PADDING
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import org.matrix.android.sdk.api.auth.data.HomeServerConnectionConfig
@@ -36,13 +37,11 @@ fun SelectHomeserverControl(
     var homeserver by rememberSaveable { mutableStateOf("") }
     var state by rememberSaveable { mutableStateOf(SelectHomeserverFieldState.Empty) }
 
-    val padding = Modifier.padding(all = 10.dp)
-
     Column(modifier) {
-        Row(padding) {
+        Row(BASE_PADDING) {
             Text(LocalContext.current.getString(R.string.selecthomeserver_text))
         }
-        Row(padding) {
+        Row(BASE_PADDING) {
             SelectHomeserverField(
                 modifier = Modifier.fillMaxWidth(),
                 value = homeserver,
@@ -87,13 +86,13 @@ fun SelectHomeserverControl(
                 state = state,
             )
         }
-        Row(padding) {
+        Row(BASE_PADDING) {
             Button(
+                modifier = Modifier.fillMaxWidth(),
                 onClick = {
                     onComplete(homeserver)
                 },
                 enabled = (state == SelectHomeserverFieldState.Valid),
-                modifier = Modifier.fillMaxWidth(),
             ) {
                 Text(LocalContext.current.getString(R.string.selecthomeserver_complete_text))
             }

app/src/main/java/eu/steffo/twom/ui/login/LoginActivity.kt

@@ -22,7 +22,6 @@ import eu.steffo.twom.ui.homeserver.SelectHomeserverActivity
 import eu.steffo.twom.ui.theme.TwoMTheme
 
 
-@OptIn(ExperimentalMaterial3Api::class)
 class LoginActivity : ComponentActivity() {
     private lateinit var homeserverLauncher: ActivityResultLauncher<Intent>
 
@@ -38,26 +37,11 @@ class LoginActivity : ComponentActivity() {
         super.onStart()
 
         setContent {
-            TwoMTheme {
-                Scaffold(
-                    topBar = {
-                        TopAppBar (
-                            title = { Text(LocalContext.current.getString(R.string.login_title)) }
-                        )
-                    }
-                ) {
-                    Row(Modifier.padding(it)) {
-                        Button(
-                            modifier = Modifier.fillMaxWidth(),
-                            onClick = {
-                                homeserverLauncher.launch(Intent(applicationContext, SelectHomeserverActivity::class.java))
-                            }
-                        ) {
-                            Text("→")
-                        }
-                    }
+            LoginActivityScaffold(
+                onSelectHomeserver = {
+                    homeserverLauncher.launch(Intent(applicationContext, SelectHomeserverActivity::class.java))
                 }
-            }
+            )
         }
     }
 }

app/src/main/java/eu/steffo/twom/ui/login/LoginActivityControl.kt

@@ -0,0 +1,73 @@
+package eu.steffo.twom.ui.login
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.Button
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.tooling.preview.Preview
+import eu.steffo.twom.R
+import eu.steffo.twom.ui.BASE_PADDING
+
+
+@Composable
+@Preview(showBackground = true)
+fun LoginActivityControl(
+    modifier: Modifier = Modifier,
+    onSelectHomeserver: () -> Unit = {},
+    onComplete: () -> Unit = {},
+) {
+    Column(modifier) {
+        Row(BASE_PADDING) {
+            Text(LocalContext.current.getString(R.string.login_text))
+        }
+        Row(BASE_PADDING) {
+            Button(
+                modifier = Modifier.fillMaxWidth(),
+                onClick = onSelectHomeserver,
+                enabled = true,
+            ) {
+                Text(LocalContext.current.getString(R.string.login_selecthomeserver_text))
+            }
+        }
+        Row(BASE_PADDING) {
+            TextField(
+                modifier = Modifier.fillMaxWidth(),
+                value = "",
+                onValueChange = {},
+                placeholder = {
+                    Text(LocalContext.current.getString(R.string.login_username_placeholder))
+                },
+                supportingText = {
+                    Text(LocalContext.current.getString(R.string.login_username_supporting))
+                },
+            )
+        }
+        Row(BASE_PADDING) {
+            TextField(
+                modifier = Modifier.fillMaxWidth(),
+                value = "",
+                onValueChange = {},
+                placeholder = {
+                    Text(LocalContext.current.getString(R.string.login_password_placeholder))
+                },
+                supportingText = {
+                    Text(LocalContext.current.getString(R.string.login_password_supporting))
+                },
+            )
+        }
+        Row(BASE_PADDING) {
+            Button(
+                modifier = Modifier.fillMaxWidth(),
+                onClick = onComplete,
+                enabled = false,
+            ) {
+                Text(LocalContext.current.getString(R.string.login_complete_text))
+            }
+        }
+    }
+}

app/src/main/java/eu/steffo/twom/ui/login/LoginActivityScaffold.kt

@@ -0,0 +1,53 @@
+package eu.steffo.twom.ui.login
+
+import android.content.Intent
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.tooling.preview.Preview
+import eu.steffo.twom.R
+import eu.steffo.twom.ui.theme.TwoMTheme
+
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+@Preview
+fun LoginActivityScaffold(
+    onBack: () -> Unit = {},
+    onSelectHomeserver: () -> Unit = {},
+) {
+    TwoMTheme {
+        Scaffold(
+            topBar = {
+                TopAppBar (
+                    navigationIcon = {
+                        IconButton(onClick = onBack) {
+                            Icon(
+                                imageVector = Icons.Filled.ArrowBack,
+                                contentDescription = LocalContext.current.getString(R.string.back)
+                            )
+                        }
+                    },
+                    title = { Text(LocalContext.current.getString(R.string.login_title)) }
+                )
+            }
+        ) {
+            LoginActivityControl(
+                modifier = Modifier.padding(it),
+                onSelectHomeserver = onSelectHomeserver,
+            )
+        }
+    }
+}

app/src/main/res/values/strings.xml

@@ -20,4 +20,11 @@
     <string name="homeserver_title">Select homeserver</string>
     <string name="login_title">Log into Matrix</string>
     <string name="back">Go back</string>
+    <string name="login_text">To use TwoM, you need to log into a Matrix homeserver.</string>
+    <string name="login_complete_text">Continue</string>
+    <string name="login_selecthomeserver_text">Select homeserver</string>
+    <string name="login_username_placeholder">\@steffo:candy.steffo.eu</string>
+    <string name="login_username_supporting">The Matrix ID to login as, including the @ symbol and the homeserver name.</string>
+    <string name="login_password_placeholder">••••••••</string>
+    <string name="login_password_supporting">The password of the Matrix account.</string>
 </resources>