isekai_wiki_app/lib/pages/welcome_page.dart

import 'dart:ui';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:get/get.dart';
import 'package:isekai_wiki/components/isekai_page_scaffold.dart';
import 'package:isekai_wiki/global.dart';
import 'package:isekai_wiki/utils/dialog.dart';
import 'package:roundcheckbox/roundcheckbox.dart';

class WelcomePageController extends GetxController {
  var isLoading = false.obs;

  var policyAccepted = false.obs;

  void handleClickPolicyLink() {
    openUrl(Global.privacyPolicyUrl, inApp: false);
  }
}

class WelcomePage extends StatelessWidget {
  const WelcomePage({super.key});

  Widget _buildSiteTitle(BuildContext context, WelcomePageController c) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: const [
        MediaQuery(
          data: MediaQueryData(textScaleFactor: 1),
          child: Text(
            Global.siteTitle,
            style: TextStyle(
                fontSize: 48, color: Colors.white, fontWeight: FontWeight.bold),
          ),
        ),
        Text(
          Global.siteDescription,
          style: TextStyle(fontSize: 18, color: Colors.white),
        ),
      ],
    );
  }

  Widget _buildActions(BuildContext context, WelcomePageController c) {
    var theme = CupertinoTheme.of(context);

    return Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        GestureDetector(
          behavior: HitTestBehavior.translucent,
          onTap: () {
            c.policyAccepted.value = !c.policyAccepted.value;
          },
          child: Row(
            children: [
              Obx(
                () => RoundCheckBox(
                  size: 24,
                  isChecked: c.policyAccepted.value,
                  onTap: (checked) {
                    c.policyAccepted.value = checked ?? false;
                  },
                  animationDuration: Duration.zero,
                  checkedColor: theme.primaryColor,
                ),
              ),
              const SizedBox(
                width: 10,
              ),
              const Text(
                "已阅读并同意",
                style: TextStyle(color: Colors.white),
              ),
              CupertinoButton(
                padding: EdgeInsets.zero,
                onPressed: c.handleClickPolicyLink,
                child: const Text(
                  "隐私政策",
                  style: TextStyle(color: Colors.lightBlue),
                ),
              )
            ],
          ),
        ),
        const SizedBox(
          height: 18,
        ),
        Obx(
          () => CupertinoButton.filled(
            disabledColor: theme.primaryColor.withOpacity(0.6),
            onPressed: c.policyAccepted.value && !c.isLoading.value
                ? () {
                    c.isLoading.value = true;
                    Future.delayed(const Duration(seconds: 5)).then((value) {
                      c.isLoading.value = false;
                    });
                  }
                : null,
            child: const Text("继续"),
          ),
        ),
      ],
    );
  }

  @override
  Widget build(BuildContext context) {
    var c = Get.put(WelcomePageController());

    return AnnotatedRegion<SystemUiOverlayStyle>(
      value: SystemUiOverlayStyle.light,
      child: IsekaiPageScaffold(
        backgroundColor: CupertinoColors.white,
        child: Stack(
          fit: StackFit.expand,
          children: [
            Container(
              decoration: const BoxDecoration(
                image: DecorationImage(
                  image: ExactAssetImage('images/title.png'),
                  fit: BoxFit.cover,
                ),
              ),
              child: BackdropFilter(
                filter: ImageFilter.blur(sigmaX: 10, sigmaY: 10),
                child: Container(
                  decoration:
                      BoxDecoration(color: Colors.black.withOpacity(0.4)),
                ),
              ),
            ),
            SafeArea(
              child: OrientationBuilder(
                builder: (context, orientation) => Padding(
                  padding: orientation == Orientation.portrait
                      ? const EdgeInsets.only(
                          top: 32, right: 20, bottom: 32, left: 20)
                      : const EdgeInsets.symmetric(
                          horizontal: 20, vertical: 32),
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Column(
                        crossAxisAlignment: CrossAxisAlignment.start,
                        children: [
                          Flexible(
                            flex: 0,
                            child: Padding(
                              padding: const EdgeInsets.symmetric(
                                  vertical: 24, horizontal: 8),
                              child: _buildSiteTitle(context, c),
                            ),
                          ),
                        ],
                      ),
                      const SizedBox(height: 36),
                      _buildActions(context, c),
                    ],
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}