mod: 图片预览优化 issues #61
This commit is contained in:
guozhigq
@ -15,7 +15,13 @@ 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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const ImagePreview({Key? key}) : super(key: key);
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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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@ -34,6 +40,11 @@ class _ImagePreviewState extends State<ImagePreview>
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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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@ -42,9 +53,8 @@ class _ImagePreviewState extends State<ImagePreview>
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}
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onOpenMenu() {
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SmartDialog.show(
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useSystem: true,
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animationType: SmartAnimationType.centerFade_otherSlide,
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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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@ -55,7 +65,7 @@ class _ImagePreviewState extends State<ImagePreview>
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ListTile(
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onTap: () {
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_previewController.onShareImg();
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SmartDialog.dismiss();
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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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@ -65,8 +75,8 @@ class _ImagePreviewState extends State<ImagePreview>
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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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SmartDialog.dismiss();
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}).catchError((err) {
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SmartDialog.showNotify(
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msg: err.toString(),
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@ -79,6 +89,7 @@ class _ImagePreviewState extends State<ImagePreview>
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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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@ -93,13 +104,21 @@ class _ImagePreviewState extends State<ImagePreview>
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// 设置状态栏图标透明
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setStatusBar() async {
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await StatusBarControl.setHidden(true, animation: StatusBarAnimation.SLIDE);
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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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StatusBarControl.setHidden(false, animation: StatusBarAnimation.SLIDE);
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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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@ -129,109 +148,105 @@ class _ImagePreviewState extends State<ImagePreview>
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direction: DismissiblePageDismissDirection.down,
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disabled: _dismissDisabled,
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isFullScreen: true,
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child: Hero(
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tag: _previewController
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.imgList[_previewController.initialPage.value],
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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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preloadPagesCount: 2,
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itemCount: _previewController.imgList.length,
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itemBuilder: (BuildContext context, int index) {
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return ExtendedImage.network(
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_previewController.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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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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preloadPagesCount: 2,
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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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@ -241,7 +256,7 @@ class _ImagePreviewState extends State<ImagePreview>
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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, top: 20),
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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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@ -262,8 +277,7 @@ class _ImagePreviewState extends State<ImagePreview>
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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(
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text: _previewController.imgList.length.toString()),
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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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