290 lines
10 KiB
Dart
290 lines
10 KiB
Dart
// ignore_for_file: library_private_types_in_public_api
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import 'dart:io';
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import 'package:dismissible_page/dismissible_page.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
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import 'package:get/get.dart';
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import 'package:flutter/material.dart';
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import 'package:extended_image/extended_image.dart';
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import 'package:pilipala/utils/download.dart';
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import 'controller.dart';
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import 'package:status_bar_control/status_bar_control.dart';
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typedef DoubleClickAnimationListener = void Function();
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class ImagePreview extends StatefulWidget {
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final int? initialPage;
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final List<String>? imgList;
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const ImagePreview({
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Key? key,
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this.initialPage,
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this.imgList,
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}) : super(key: key);
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@override
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_ImagePreviewState createState() => _ImagePreviewState();
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}
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class _ImagePreviewState extends State<ImagePreview>
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with TickerProviderStateMixin {
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final PreviewController _previewController = Get.put(PreviewController());
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// late AnimationController animationController;
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late AnimationController _doubleClickAnimationController;
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Animation<double>? _doubleClickAnimation;
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late DoubleClickAnimationListener _doubleClickAnimationListener;
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List<double> doubleTapScales = <double>[1.0, 2.0];
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bool _dismissDisabled = false;
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@override
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void initState() {
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super.initState();
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_previewController.initialPage.value = widget.initialPage!;
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_previewController.currentPage.value = widget.initialPage! + 1;
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_previewController.imgList.value = widget.imgList!;
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_previewController.currentImgUrl = widget.imgList![widget.initialPage!];
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// animationController = AnimationController(
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// vsync: this, duration: const Duration(milliseconds: 400));
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setStatusBar();
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_doubleClickAnimationController = AnimationController(
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duration: const Duration(milliseconds: 250), vsync: this);
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}
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onOpenMenu() {
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showDialog(
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context: context,
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builder: (BuildContext context) {
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return AlertDialog(
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clipBehavior: Clip.hardEdge,
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contentPadding: const EdgeInsets.fromLTRB(0, 12, 0, 12),
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content: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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ListTile(
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onTap: () {
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_previewController.onShareImg();
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Get.back();
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},
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dense: true,
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title: const Text('分享', style: TextStyle(fontSize: 14)),
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),
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ListTile(
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onTap: () {
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Clipboard.setData(
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ClipboardData(text: _previewController.currentImgUrl))
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.then((value) {
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Get.back();
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SmartDialog.showToast('已复制到粘贴板');
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}).catchError((err) {
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SmartDialog.showNotify(
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msg: err.toString(),
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notifyType: NotifyType.error,
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);
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});
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},
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dense: true,
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title: const Text('复制链接', style: TextStyle(fontSize: 14)),
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),
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ListTile(
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onTap: () {
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Get.back();
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DownloadUtils.downloadImg(_previewController.currentImgUrl);
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},
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dense: true,
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title: const Text('保存到手机', style: TextStyle(fontSize: 14)),
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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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// 设置状态栏图标透明
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setStatusBar() async {
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if (Platform.isIOS) {
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await StatusBarControl.setHidden(true,
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animation: StatusBarAnimation.SLIDE);
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}
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if (Platform.isAndroid) {
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await StatusBarControl.setColor(Colors.transparent);
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}
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}
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@override
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void dispose() {
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// animationController.dispose();
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try {
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StatusBarControl.setHidden(false, animation: StatusBarAnimation.SLIDE);
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} catch (_) {}
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_doubleClickAnimationController.dispose();
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clearGestureDetailsCache();
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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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return Scaffold(
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backgroundColor: Colors.black,
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primary: false,
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extendBody: true,
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appBar: AppBar(
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primary: false,
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toolbarHeight: 0,
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backgroundColor: Colors.black,
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systemOverlayStyle: SystemUiOverlayStyle.dark,
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),
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body: Stack(
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children: [
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DismissiblePage(
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backgroundColor: Colors.transparent,
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onDismissed: () {
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Navigator.of(context).pop();
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},
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// Note that scrollable widget inside DismissiblePage might limit the functionality
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// If scroll direction matches DismissiblePage direction
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direction: DismissiblePageDismissDirection.down,
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disabled: _dismissDisabled,
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isFullScreen: true,
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child: GestureDetector(
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onLongPress: () => onOpenMenu(),
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child: ExtendedImageGesturePageView.builder(
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controller: ExtendedPageController(
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initialPage: _previewController.initialPage.value,
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pageSpacing: 0,
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),
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onPageChanged: (int index) =>
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_previewController.onChange(index),
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canScrollPage: (GestureDetails? gestureDetails) =>
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gestureDetails!.totalScale! <= 1.0,
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itemCount: widget.imgList!.length,
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itemBuilder: (BuildContext context, int index) {
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return ExtendedImage.network(
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widget.imgList![index],
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fit: BoxFit.contain,
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mode: ExtendedImageMode.gesture,
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onDoubleTap: (ExtendedImageGestureState state) {
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final Offset? pointerDownPosition =
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state.pointerDownPosition;
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final double? begin = state.gestureDetails!.totalScale;
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double end;
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//remove old
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_doubleClickAnimation
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?.removeListener(_doubleClickAnimationListener);
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//stop pre
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_doubleClickAnimationController.stop();
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//reset to use
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_doubleClickAnimationController.reset();
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if (begin == doubleTapScales[0]) {
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setState(() {
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_dismissDisabled = true;
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});
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end = doubleTapScales[1];
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} else {
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setState(() {
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_dismissDisabled = false;
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});
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end = doubleTapScales[0];
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}
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_doubleClickAnimationListener = () {
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state.handleDoubleTap(
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scale: _doubleClickAnimation!.value,
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doubleTapPosition: pointerDownPosition);
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};
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_doubleClickAnimation = _doubleClickAnimationController
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.drive(Tween<double>(begin: begin, end: end));
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_doubleClickAnimation!
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.addListener(_doubleClickAnimationListener);
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_doubleClickAnimationController.forward();
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},
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// ignore: body_might_complete_normally_nullable
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loadStateChanged: (ExtendedImageState state) {
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if (state.extendedImageLoadState == LoadState.loading) {
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final ImageChunkEvent? loadingProgress =
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state.loadingProgress;
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final double? progress =
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loadingProgress?.expectedTotalBytes != null
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? loadingProgress!.cumulativeBytesLoaded /
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loadingProgress.expectedTotalBytes!
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: null;
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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crossAxisAlignment: CrossAxisAlignment.center,
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children: <Widget>[
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SizedBox(
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width: 150.0,
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child: LinearProgressIndicator(
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value: progress,
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color: Colors.white,
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),
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),
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// const SizedBox(height: 10.0),
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// Text('${((progress ?? 0.0) * 100).toInt()}%',),
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],
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),
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);
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}
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},
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initGestureConfigHandler: (ExtendedImageState state) {
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return GestureConfig(
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inPageView: true,
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initialScale: 1.0,
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maxScale: 5.0,
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animationMaxScale: 6.0,
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initialAlignment: InitialAlignment.center,
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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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Positioned(
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left: 0,
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right: 0,
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bottom: 0,
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child: Container(
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padding: EdgeInsets.only(
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bottom: MediaQuery.of(context).padding.bottom + 30),
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decoration: const BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: <Color>[
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Colors.transparent,
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Colors.black87,
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],
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tileMode: TileMode.mirror,
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),
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),
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child: Obx(
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() => Text.rich(
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textAlign: TextAlign.center,
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TextSpan(
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style: const TextStyle(color: Colors.white, fontSize: 15),
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children: [
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TextSpan(
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text: _previewController.currentPage.toString()),
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const TextSpan(text: ' / '),
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TextSpan(text: widget.imgList!.length.toString()),
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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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);
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}
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}
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