PokeDex/lib/filters.dart

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:libacflutter/Constants.dart';
import 'package:pokedex/Session.dart';

class Filters {
  static final int GEN1 = 1;
  static final int GEN2 = 2;
  static final int GEN3 = 4;
  static final int GEN4 = 8;
  static final int GEN5 = 16;
  static final int GEN6 = 32;
  static final int GEN7 = 64;
  static final int GEN8 = 128;
  static final int GEN9 = 255;

  static final int All =
      GEN1 | GEN2 | GEN3 | GEN4 | GEN5 | GEN6 | GEN7 | GEN8 | GEN9;
}

class FilterPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _filterPage();
  }
}

class _filterPage extends State<FilterPage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("PokeDex - Filters"),
        backgroundColor:
            SessionData.darkMode
                ? LibACFlutterConstants.TITLEBAR_COLOR
                : Colors.cyan,
      ),
      body: Padding(
        padding: EdgeInsets.all(8),
        child: SingleChildScrollView(
          child: Column(
            children: [
              Text(
                "The PokeDex's filters will allow you to customize what Generations are shown in the app.\n\n** WARNING **\nThis will prevent evolutions from showing up if the Pokemon resides in a future generation.\n\nThe dex entries will also not show the evolution conditions, or catch conditions for disabled generations.",
                style: TextStyle(fontSize: 24),
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN1 == Filters.GEN1),
                title: Text("Generation 1"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN1;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN2 == Filters.GEN2),
                title: Text("Generation 2"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN2;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN3 == Filters.GEN3),
                title: Text("Generation 3"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN3;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN4 == Filters.GEN4),
                title: Text("Generation 4"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN4;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN5 == Filters.GEN5),
                title: Text("Generation 5"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN5;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN6 == Filters.GEN6),
                title: Text("Generation 6"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN6;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN7 == Filters.GEN7),
                title: Text("Generation 7"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN7;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN8 == Filters.GEN8),
                title: Text("Generation 8"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN8;
                  });
                },
              ),
              SwitchListTile(
                value: (SessionData.filter & Filters.GEN9 == Filters.GEN9),
                title: Text("Generation 9"),

                onChanged: (val) {
                  setState(() {
                    SessionData.filter = SessionData.filter ^ Filters.GEN9;
                  });
                },
              ),
            ],
          ),
        ),
      ),
    );
  }
}