add pagination to activities

ui/lib/activity.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:percent_indicator/circular_percent_indicator.dart';
 import 'package:ui/providers/activity.dart';
+import 'package:ui/utils.dart';
 import 'package:ui/widgets/progress_indicator.dart';
 
 class ActivityPage extends ConsumerWidget {
@@ -15,7 +16,8 @@ class ActivityPage extends ConsumerWidget {
     return activitiesWatcher.when(
         data: (activities) {
           return SingleChildScrollView(
-            child: DataTable(
+            child: PaginatedDataTable(
+              rowsPerPage: 10,
               columns: const [
                 DataColumn(label: Text("#"), numeric: true),
                 DataColumn(label: Text("名称")),
@@ -23,55 +25,73 @@ class ActivityPage extends ConsumerWidget {
                 DataColumn(label: Text("状态")),
                 DataColumn(label: Text("操作"))
               ],
-              rows: List<DataRow>.generate(activities.length, (i) {
-                var activity = activities[activities.length - i - 1];
-
-                return DataRow(cells: [
-                  DataCell(Text("${activity.id}")),
-                  DataCell(Text("${activity.sourceTitle}")),
-                  DataCell(Text("${activity.date!.toLocal()}")),
-                  DataCell(() {
-                    if (activity.status == "uploading") {
-                      return const SizedBox(
-                          width: 20,
-                          height: 20,
-                          child: CircularProgressIndicator());
-                    } else if (activity.status == "fail") {
-                      return const Icon(
-                        Icons.close,
-                        color: Colors.red,
-                      );
-                    } else if (activity.status == "success") {
-                      return const Icon(
-                        Icons.check,
-                        color: Colors.green,
-                      );
-                    }
-
-                    double p = activity.progress == null
-                        ? 0
-                        : activity.progress!.toDouble() / 100;
-                    return CircularPercentIndicator(
-                      radius: 15.0,
-                      lineWidth: 5.0,
-                      percent: p,
-                      center: Text("${p * 100}"),
-                      progressColor: Colors.green,
-                    );
-                  }()),
-                  DataCell(IconButton(
-                      onPressed: () {
-                        ref
-                            .read(activitiesDataProvider.notifier)
-                            .deleteActivity(activity.id!);
-                      },
-                      icon: const Icon(Icons.delete)))
-                ]);
-              }),
+              source: ActivityDataSource(activities: activities, onDelete: onDelete(ref)),
             ),
           );
         },
         error: (err, trace) => Text("$err"),
         loading: () => const MyProgressIndicator());
   }
+
+  Function(int) onDelete(WidgetRef ref) {
+    return (id) {
+      ref
+          .read(activitiesDataProvider.notifier)
+          .deleteActivity(id)
+          .whenComplete(() => Utils.showSnakeBar("删除成功"))
+          .onError((error, trace) => Utils.showSnakeBar("删除失败：$error"));
+    };
+  }
+}
+
+class ActivityDataSource extends DataTableSource {
+  List<Activity> activities;
+  Function(int) onDelete;
+  ActivityDataSource({required this.activities, required this.onDelete});
+
+  @override
+  int get rowCount => activities.length;
+
+  @override
+  DataRow? getRow(int index) {
+    final activity = activities[index];
+    return DataRow(cells: [
+      DataCell(Text("${activity.id}")),
+      DataCell(Text("${activity.sourceTitle}")),
+      DataCell(Text("${activity.date!.toLocal()}")),
+      DataCell(() {
+        if (activity.status == "uploading") {
+          return const SizedBox(
+              width: 20, height: 20, child: CircularProgressIndicator());
+        } else if (activity.status == "fail") {
+          return const Icon(
+            Icons.close,
+            color: Colors.red,
+          );
+        } else if (activity.status == "success") {
+          return const Icon(
+            Icons.check,
+            color: Colors.green,
+          );
+        }
+
+        double p =
+            activity.progress == null ? 0 : activity.progress!.toDouble() / 100;
+        return CircularPercentIndicator(
+          radius: 15.0,
+          lineWidth: 5.0,
+          percent: p,
+          center: Text("${p * 100}"),
+          progressColor: Colors.green,
+        );
+      }()),
+      DataCell(IconButton(onPressed:() => onDelete(activity.id!), icon: const Icon(Icons.delete)))
+    ]);
+  }
+
+  @override
+  bool get isRowCountApproximate => false;
+
+  @override
+  int get selectedRowCount => 0;
 }

ui/lib/movie_watchlist.dart

@@ -10,7 +10,7 @@ import 'package:ui/welcome_page.dart';
 import 'package:ui/widgets/progress_indicator.dart';
 
 class MovieDetailsPage extends ConsumerStatefulWidget {
-  static const route = "/movie/";
+  static const route = "/movie/:id";
 
   static String toRoute(int id) {
     return "/movie/$id";