dreampad/lib/app/modules/welcome/views/welcome_view.dart

import 'package:dreampad/app/modules/welcome/views/hello_widget.dart';
import 'package:dreampad/app/modules/welcome/views/input_widget.dart';
import 'package:dreampad/app/modules/welcome/views/partner_widget.dart';
import 'package:dreampad/app/shared/shared.dart';
import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:get/get.dart';

import '../controllers/welcome_controller.dart';

import 'splash_view.dart';

class WelcomeView extends GetView<WelcomeController> {
  const WelcomeView({super.key});

  @override
  Widget build(BuildContext context) {
    return SwipeNextPageContainer(
      children: [
        const _Background(),
        HookBuilder(builder: (context) {
          final currentIndexState =
              SwipeNextPageContainer.of(context)!.currentIndex;
          final showWelcomeView = useListenableSelector(
              currentIndexState, () => currentIndexState.value == 1);

          return AnimatedVisibilityWidget(
            isVisible: showWelcomeView,
            animationWidgetBuilder:
                AnimatedVisibilityWidget.fadeAnimationWidgetBuilder,
            child: Visibility(
              visible: showWelcomeView,
              child: SwipeNextPageContainer(
                children: [
                  SwipePageCurrentVisible(
                    child: HookBuilder(builder: (context) {
                      final finishInput = useState(false);
                      final showPartner = useState(false);
                      return showPartner.value
                          ? const PartnerWidget()
                          : AnimatedVisibilityWidget(
                              isVisible: !finishInput.value,
                              duration: const Duration(milliseconds: 800),
                              curve: Curves.fastOutSlowIn,
                              animationWidgetBuilder: AnimatedVisibilityWidget
                                  .fadeAnimationWidgetBuilder,
                              onDone: (visible) {
                                if (!visible) {
                                  showPartner.value = true;
                                }
                              },
                              child: InputWidget(
                                onFinished: () {
                                  finishInput.value = true;
                                },
                              ),
                            );
                    }),
                  ),
                  const SwipePageFadeOutContainer(
                    child: HelloWidget(),
                  ),
                ],
              ),
            ),
          );
        }),
        const SwipePageFadeOutContainer(
          child: SplashView(),
        ),
      ],
    );
  }
}

class _Background extends StatelessWidget {
  const _Background();

  @override
  Widget build(BuildContext context) {
    return LayoutBuilder(builder: (context, constraint) {
      final controller = SwipeNextPageContainer.of(context)!.controller;
      final currentIndexState =
          SwipeNextPageContainer.of(context)!.currentIndex;
      return HookBuilder(builder: (context) {
        final currentIndex = useListenableSelector(currentIndexState, () {
          return currentIndexState.value;
        });
        return AnimatedBuilder(
            animation: controller,
            builder: (context, _) {
              final animationValue =
                  currentIndex == 2 ? controller.value : controller.upperBound;
              return Stack(
                children: [
                  Positioned(
                    top: 0 - animationValue + 1,
                    left: 2,
                    right: -2,
                    child: Container(
                      width: constraint.maxWidth,
                      height: constraint.maxHeight,
                      decoration: const BoxDecoration(
                        image: DecorationImage(
                          image: Images.splashBg,
                          fit: BoxFit.fill,
                        ),
                      ),
                    ),
                  ),
                  Positioned(
                    top: controller.upperBound - animationValue,
                    left: 0,
                    right: 0,
                    child: Container(
                      width: constraint.maxWidth,
                      height: constraint.maxHeight,
                      decoration: const BoxDecoration(
                        image: DecorationImage(
                          image: Images.welcomeBg,
                          fit: BoxFit.fill,
                        ),
                      ),
                    ),
                  ),
                ],
              );
            });
      });
    });
  }
}