improve scrolling ux

app/src/main/java/com/bitcointxoko/gudariwallet/ui/HistoryScreen.kt

@@ -13,9 +13,9 @@ import androidx.compose.material.icons.filled.ArrowDownward
 import androidx.compose.material.icons.filled.ArrowUpward
 import androidx.compose.material.icons.filled.Close
 import androidx.compose.material.icons.filled.ContentCopy
-import androidx.compose.material.icons.filled.Refresh
 import androidx.compose.material.icons.outlined.ContentCopy
 import androidx.compose.material3.*
+import androidx.compose.material3.pulltorefresh.PullToRefreshBox
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -59,11 +59,6 @@ fun HistoryScreen(
                             contentDescription = "Close"
                         )
                     }
-                },
-                actions = {
-                    IconButton(onClick = { vm.refresh() }) {
-                        Icon(Icons.Default.Refresh, contentDescription = "Refresh")
-                    }
                 }
             )
         }
@@ -95,6 +90,16 @@ fun HistoryScreen(
                 }
 
                 is HistoryState.Success -> {
+                    val shouldLoadMore by remember {
+                        derivedStateOf {
+                            val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()
+                            val totalItems  = listState.layoutInfo.totalItemsCount
+                            lastVisible != null && lastVisible.index >= totalItems - 3
+                        }
+                    }
+                    LaunchedEffect(shouldLoadMore) {
+                        if (shouldLoadMore && s.canLoadMore) vm.loadMore()
+                    }
                     if (s.payments.isEmpty()) {
                         Text(
                             text     = "No payments yet.",
@@ -102,21 +107,15 @@ fun HistoryScreen(
                             style    = MaterialTheme.typography.bodyMedium,
                             color    = MaterialTheme.colorScheme.onSurfaceVariant
                         )
-                    } else {
+                    } else PullToRefreshBox(
+                        isRefreshing = s.isRefreshing,
+                        onRefresh    = { vm.refresh() }
+                    ) {
                         LazyColumn(
                             state          = listState,
                             modifier       = Modifier.fillMaxSize(),
                             contentPadding = PaddingValues(vertical = 8.dp)
                         ) {
-                            if (s.isRefreshing) {
-                                item {
-                                    LinearProgressIndicator(
-                                        modifier = Modifier
-                                            .fillMaxWidth()
-                                            .padding(bottom = 4.dp)
-                                    )
-                                }
-                            }
                             items(
                                 items = s.payments,
                                 key   = { it.paymentHash }
@@ -141,9 +140,10 @@ fun HistoryScreen(
                                             .padding(16.dp),
                                         contentAlignment = Alignment.Center
                                     ) {
-                                        OutlinedButton(onClick = { vm.loadMore() }) {
-                                            Text("More")
-                                        }
+                                        CircularProgressIndicator(
+                                            modifier    = Modifier.size(24.dp),
+                                            strokeWidth = 2.dp
+                                        )
                                     }
                                 }
                             }