add TextInputDialog

app/src/main/java/helium314/keyboard/settings/dialogs/TextInputDialog.kt

@@ -0,0 +1,96 @@
+package helium314.keyboard.settings.dialogs
+
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.text.KeyboardOptions
+import androidx.compose.material3.AlertDialog
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
+import androidx.compose.material3.contentColorFor
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.Shape
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.TextRange
+import androidx.compose.ui.text.input.KeyboardType
+import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.window.DialogProperties
+
+// taken from StreetComplete / SCEE
+/** Dialog with which to input text. OK button is only clickable if [checkTextValid] returns true. */
+@Composable
+fun TextInputDialog(
+    onDismissRequest: () -> Unit,
+    onConfirmed: (text: String) -> Unit,
+    modifier: Modifier = Modifier,
+    title: @Composable (() -> Unit)? = null,
+    initialText: String = "",
+    textInputLabel: @Composable (() -> Unit)? = null,
+    shape: Shape = MaterialTheme.shapes.medium,
+    backgroundColor: Color = MaterialTheme.colorScheme.surface,
+    contentColor: Color = contentColorFor(backgroundColor),
+    properties: DialogProperties = DialogProperties(),
+    keyboardType: KeyboardType = KeyboardType.Unspecified,
+    checkTextValid: (text: String) -> Boolean = { it.isNotBlank() }
+) {
+    val focusRequester = remember { FocusRequester() }
+
+    var value by remember {
+        mutableStateOf(TextFieldValue(initialText, selection = TextRange(0, initialText.length)))
+    }
+
+    LaunchedEffect(initialText) { focusRequester.requestFocus() }
+
+    AlertDialog(
+        onDismissRequest = onDismissRequest,
+        confirmButton = {
+            TextButton(
+                enabled = value.text.isNotBlank() && checkTextValid(value.text),
+                onClick = { onDismissRequest(); onConfirmed(value.text) }
+            ) {
+                Text(stringResource(android.R.string.ok))
+            }
+        },
+        dismissButton = {
+            TextButton(onClick = onDismissRequest) { Text(stringResource(android.R.string.cancel)) }
+        },
+        modifier = modifier,
+        title = title,
+        text = {
+            OutlinedTextField(
+                value = value,
+                onValueChange = { value = it },
+                modifier = Modifier.fillMaxWidth().focusRequester(focusRequester),
+                label = textInputLabel,
+                keyboardOptions = KeyboardOptions(keyboardType = keyboardType),
+                singleLine = true
+            )
+        },
+        shape = shape,
+        containerColor = backgroundColor,
+        textContentColor = contentColor,
+        properties = properties,
+    )
+}
+
+@Preview
+@Composable
+private fun Preview() {
+    TextInputDialog(
+        onDismissRequest = {},
+        onConfirmed = {},
+        title = { Text("Title") },
+        initialText = "some text",
+        textInputLabel = { Text("fill it") }
+    )
+}

app/src/main/java/helium314/keyboard/settings/screens/AppearanceScreen.kt

@@ -49,6 +49,7 @@ import helium314.keyboard.settings.SliderPreference
 import helium314.keyboard.settings.SwitchPreference
 import helium314.keyboard.settings.Theme
 import helium314.keyboard.settings.dialogs.CustomizeIconsDialog
+import helium314.keyboard.settings.dialogs.TextInputDialog
 import helium314.keyboard.settings.keyboardNeedsReload
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
@@ -305,7 +306,15 @@ fun createAppearancePrefs(context: Context) = listOf(
             name = def.title,
             onClick = { showDialog = true },
             description = prefs.getString(def.key, "")
-        ) // todo: create and show the dialog
+        )
+        if (showDialog) {
+            TextInputDialog(
+                onDismissRequest = { showDialog = false },
+                onConfirmed = { prefs.edit().putString(def.key, it).apply() },
+                initialText = prefs.getString(def.key, "") ?: "",
+                title = { Text(def.title) }
+            )
+        }
     },
     PrefDef(context, NonSettingsPrefs.CUSTOM_FONT, R.string.custom_font) { def ->
         var showDialog by remember { mutableStateOf(false) }