147 lines
4.0 KiB
Dart
147 lines
4.0 KiB
Dart
import 'dart:convert';
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import 'dart:typed_data';
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import 'package:flutter/material.dart';
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import 'package:smooth_page_indicator/smooth_page_indicator.dart';
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import '../theme/app_theme.dart';
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import '../screens/carousel_detail_screen.dart';
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/// Auto-scrolling carousel widget that shows slides from CMS.
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/// Each slide can have an uploaded image (base64) or external image URL.
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class CarouselWidget extends StatefulWidget {
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final List<dynamic> slides;
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const CarouselWidget({super.key, required this.slides});
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@override
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State<CarouselWidget> createState() => _CarouselWidgetState();
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}
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class _CarouselWidgetState extends State<CarouselWidget> {
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final PageController _controller = PageController();
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int _current = 0;
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@override
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void initState() {
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super.initState();
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if (widget.slides.length > 1) {
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Future.delayed(const Duration(seconds: 4), _autoScroll);
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}
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}
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void _autoScroll() {
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if (!mounted) return;
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final next = (_current + 1) % widget.slides.length;
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_controller.animateToPage(
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next,
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duration: const Duration(milliseconds: 500),
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curve: Curves.easeInOut,
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);
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Future.delayed(const Duration(seconds: 4), _autoScroll);
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}
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void _onTap(dynamic slide) {
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Navigator.push(
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context,
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MaterialPageRoute(builder: (_) => CarouselDetailScreen(slide: slide)),
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);
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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if (widget.slides.isEmpty) return const SizedBox.shrink();
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return Column(
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children: [
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SizedBox(
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height: 180,
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child: PageView.builder(
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controller: _controller,
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itemCount: widget.slides.length,
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onPageChanged: (i) => setState(() => _current = i),
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itemBuilder: (context, index) {
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final slide = widget.slides[index];
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return GestureDetector(
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onTap: () => _onTap(slide),
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child: _SlideImage(slide: slide),
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);
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},
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),
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),
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if (widget.slides.length > 1)
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Padding(
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padding: const EdgeInsets.only(top: 10),
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child: SmoothPageIndicator(
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controller: _controller,
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count: widget.slides.length,
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effect: ExpandingDotsEffect(
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dotHeight: 6,
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dotWidth: 6,
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expansionFactor: 3,
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dotColor: AppTheme.surfaceContainer,
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activeDotColor: AppTheme.secondary,
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),
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),
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),
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],
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);
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}
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}
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class _SlideImage extends StatelessWidget {
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final dynamic slide;
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const _SlideImage({required this.slide});
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@override
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Widget build(BuildContext context) {
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final base64Img = slide['image'] as String?;
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final externalUrl = slide['image_url'] as String?;
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Widget image;
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if (base64Img != null && base64Img.isNotEmpty) {
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// Uploaded image — decode base64
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try {
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final Uint8List bytes = base64Decode(base64Img);
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image = Image.memory(bytes, fit: BoxFit.cover, width: double.infinity);
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} catch (_) {
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image = _placeholder();
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}
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} else if (externalUrl != null && externalUrl.isNotEmpty) {
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// External URL image
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image = Image.network(
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externalUrl,
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fit: BoxFit.cover,
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width: double.infinity,
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errorBuilder: (_, __, ___) => _placeholder(),
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loadingBuilder: (ctx, child, progress) {
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if (progress == null) return child;
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return const Center(child: CircularProgressIndicator());
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},
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);
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} else {
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image = _placeholder();
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}
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return Container(
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margin: const EdgeInsets.symmetric(horizontal: 16),
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decoration: const BoxDecoration(color: AppTheme.surfaceContainerLow),
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child: ClipRect(child: image),
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);
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}
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Widget _placeholder() {
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return Container(
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color: AppTheme.surfaceContainer,
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child: const Center(
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child: Icon(Icons.image_rounded, size: 48, color: AppTheme.outlineVariant),
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),
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);
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}
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}
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