OpenMediacenterMobileFlutter/lib/shufflescreen.dart

import 'dart:convert';
import 'dart:math';

import 'package:flutter/material.dart';
import 'package:openmediacentermobile/preview_grid.dart';
import 'preview_tile.dart';

import 'api/api.dart';
import 'platform.dart';

class ShuffleScreen extends StatefulWidget {
  const ShuffleScreen({Key? key}) : super(key: key);

  @override
  State<ShuffleScreen> createState() => _ShuffleScreenState();
}

class _ShuffleScreenState extends State<ShuffleScreen> {
  Future<List<VideoT>> loadData(int nr) async {
    final data = await API.query("video", "getRandomMovies",
        {'Number': nr, 'Seed': Random().nextInt(0x7fffffff)});

    final d = jsonDecode(data);

    List<VideoT> dta =
        (d['Videos'] as List).map((e) => VideoT.fromJson(e)).toList();

    return dta;
  }

  @override
  Widget build(BuildContext context) {
    double width = MediaQuery.of(context).size.width;
    return PreviewGrid(
      videoLoader: () {
        return loadData((isTV() ? width ~/ 200 : width ~/ 275) * 2);
      },
      footerBuilder: (state) => Column(
        children: [
          const SizedBox(
            height: 25,
          ),
          TextButton.icon(
            onPressed: () {
              state.loadData();
            },
            icon: const Icon(Icons.update),
            label: const Text("Shuffle"),
          ),
          const SizedBox(
            height: 25,
          ),
        ],
      ),
    );
  }
}