kopia lustrzana https://gitlab.com/mysocialportal/relatica
Implementation of image carousel with carousel_slider library
Hank Grabowski
rodzic
8fad35ed33
commit
b23f45a180
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@ -1,6 +1,7 @@
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import 'dart:io';
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import 'package:cached_network_image/cached_network_image.dart';
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import 'package:carousel_slider/carousel_slider.dart';
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import 'package:file_picker/file_picker.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_file_dialog/flutter_file_dialog.dart';
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@ -19,7 +20,7 @@ class ImageViewerScreen extends StatefulWidget {
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const ImageViewerScreen({
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super.key,
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required this.attachments,
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int this.initialIndex = 0,
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this.initialIndex = 0,
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});
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@override
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@ -27,11 +28,12 @@ class ImageViewerScreen extends StatefulWidget {
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}
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class _ImageViewerScreenState extends State<ImageViewerScreen> {
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var index = 0;
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MediaAttachment? currentAttachment;
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@override
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void initState() {
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index = widget.initialIndex;
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super.initState();
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currentAttachment = widget.attachments[widget.initialIndex];
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}
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Future<void> saveImage(
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@ -71,109 +73,62 @@ class _ImageViewerScreenState extends State<ImageViewerScreen> {
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@override
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Widget build(BuildContext context) {
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print('Index: $index');
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final attachment = widget.attachments[index];
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final width = MediaQuery.of(context).size.width;
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final height = MediaQuery.of(context).size.height;
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final carouselHeight =
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widget.attachments.length == 1 ? height * 0.9 : height * 0.8;
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return Scaffold(
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appBar: AppBar(
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actions: [
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IconButton(
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onPressed: () => saveImage(context, attachment),
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onPressed: currentAttachment == null
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? null
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: () => saveImage(context, currentAttachment!),
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icon: const Icon(Icons.download))
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],
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),
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body: SafeArea(
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child: Stack(
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child: Column(
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children: [
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GestureDetector(
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onHorizontalDragEnd: (details) {
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final velocity = details.primaryVelocity ?? 0.0;
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print('Velocity: $velocity');
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if (velocity > 0 && index > 0) {
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setState(() {
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index--;
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});
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}
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if (velocity < 0 && index < widget.attachments.length - 1) {
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setState(() {
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index++;
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});
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}
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CarouselSlider.builder(
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itemCount: widget.attachments.length,
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itemBuilder: (context, index, realIndex) {
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return SizedBox(
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width: width,
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height: carouselHeight,
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child: InteractiveViewer(
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maxScale: 10.0,
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scaleFactor: 400,
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child: CachedNetworkImage(
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imageUrl: widget.attachments[index].uri.toString()),
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),
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);
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},
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child: buildCoreViewer(attachment),
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options: CarouselOptions(
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height: carouselHeight,
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initialPage: widget.initialIndex,
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enableInfiniteScroll: false,
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enlargeCenterPage: true,
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viewportFraction: 0.95,
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onPageChanged: (index, reason) {
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setState(() {
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currentAttachment = widget.attachments[index];
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});
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}),
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),
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if (index > 0)
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Positioned(
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top: height / 2,
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left: 0.0,
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child: buildButton(
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Icon(Icons.keyboard_arrow_left),
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onPressed: () {
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setState(() {
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index--;
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});
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},
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),
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),
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if (index < widget.attachments.length - 1)
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Positioned(
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top: height / 2,
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right: 0.0,
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child: buildButton(
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Icon(Icons.keyboard_arrow_right),
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onPressed: () {
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setState(() {
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index++;
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});
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},
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),
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),
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if (currentAttachment != null) buildTextArea(currentAttachment!),
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],
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),
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),
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);
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}
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Widget buildCoreViewer(MediaAttachment attachment) {
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final width = MediaQuery.of(context).size.width;
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final height = MediaQuery.of(context).size.height;
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return Column(
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mainAxisAlignment: MainAxisAlignment.start,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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SizedBox(
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width: width,
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height: 0.8 * height,
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child: InteractiveViewer(
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maxScale: 10.0,
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scaleFactor: 400,
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child: CachedNetworkImage(imageUrl: attachment.uri.toString()),
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),
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),
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Expanded(
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child: SingleChildScrollView(
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child: Padding(
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padding: const EdgeInsets.all(8.0),
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child: Text(attachment.description),
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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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Widget buildButton(Icon icon, {required Function() onPressed}) {
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return Center(
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child: Ink(
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decoration: ShapeDecoration(
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color: Theme.of(context).focusColor,
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shape: CircleBorder(),
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),
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child: IconButton(
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icon: icon,
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color: Colors.white,
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onPressed: onPressed,
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Widget buildTextArea(MediaAttachment attachment) {
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return Expanded(
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child: SingleChildScrollView(
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child: Padding(
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padding: const EdgeInsets.all(8.0),
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child: Text(attachment.description),
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),
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),
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);
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@ -137,6 +137,14 @@ packages:
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url: "https://pub.dev"
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source: hosted
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version: "1.0.2"
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carousel_slider:
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dependency: "direct main"
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description:
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name: carousel_slider
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sha256: "9c695cc963bf1d04a47bd6021f68befce8970bcd61d24938e1fb0918cf5d9c42"
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url: "https://pub.dev"
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source: hosted
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version: "4.2.1"
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characters:
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dependency: transitive
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description:
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@ -42,6 +42,7 @@ dependencies:
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objectbox: ^1.7.1
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objectbox_flutter_libs: ^1.7.1
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path_provider: ^2.0.11
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carousel_slider: ^4.2.1
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dev_dependencies:
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flutter_test:
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