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feat: 动态页图片、图片预览页无障碍适配

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orz12
2024-03-13 20:02:59 +08:00
parent ab2fb39952
commit d3c2a9d8f3
2 changed files with 147 additions and 139 deletions
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180
lib/pages/preview/view.dart
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@@ -135,103 +135,107 @@ class _ImagePreviewState extends State<ImagePreview>
),
body: Stack(
children: [
GestureDetector(
onLongPress: () => onOpenMenu(),
child: ExtendedImageGesturePageView.builder(
controller: ExtendedPageController(
initialPage: _previewController.initialPage.value,
pageSpacing: 0,
),
onPageChanged: (int index) => _previewController.onChange(index),
canScrollPage: (GestureDetails? gestureDetails) =>
gestureDetails!.totalScale! <= 1.0,
itemCount: widget.imgList!.length,
itemBuilder: (BuildContext context, int index) {
return ExtendedImage.network(
widget.imgList![index],
fit: BoxFit.contain,
mode: ExtendedImageMode.gesture,
onDoubleTap: (ExtendedImageGestureState state) {
final Offset? pointerDownPosition =
state.pointerDownPosition;
final double? begin = state.gestureDetails!.totalScale;
double end;
Semantics(
label: '双指缩放、长按保存、左右滑动切换图片',
child: GestureDetector(
onLongPress: () => onOpenMenu(),
child: ExtendedImageGesturePageView.builder(
controller: ExtendedPageController(
initialPage: _previewController.initialPage.value,
pageSpacing: 0,
),
onPageChanged: (int index) =>
_previewController.onChange(index),
canScrollPage: (GestureDetails? gestureDetails) =>
gestureDetails!.totalScale! <= 1.0,
itemCount: widget.imgList!.length,
itemBuilder: (BuildContext context, int index) {
return ExtendedImage.network(
widget.imgList![index],
fit: BoxFit.contain,
mode: ExtendedImageMode.gesture,
onDoubleTap: (ExtendedImageGestureState state) {
final Offset? pointerDownPosition =
state.pointerDownPosition;
final double? begin = state.gestureDetails!.totalScale;
double end;
//remove old
_doubleClickAnimation
?.removeListener(_doubleClickAnimationListener);
//remove old
_doubleClickAnimation
?.removeListener(_doubleClickAnimationListener);
//stop pre
_doubleClickAnimationController.stop();
//stop pre
_doubleClickAnimationController.stop();
//reset to use
_doubleClickAnimationController.reset();
//reset to use
_doubleClickAnimationController.reset();
if (begin == doubleTapScales[0]) {
setState(() {
_dismissDisabled = true;
});
end = doubleTapScales[1];
} else {
setState(() {
_dismissDisabled = false;
});
end = doubleTapScales[0];
}
if (begin == doubleTapScales[0]) {
setState(() {
_dismissDisabled = true;
});
end = doubleTapScales[1];
} else {
setState(() {
_dismissDisabled = false;
});
end = doubleTapScales[0];
}
_doubleClickAnimationListener = () {
state.handleDoubleTap(
scale: _doubleClickAnimation!.value,
doubleTapPosition: pointerDownPosition);
};
_doubleClickAnimation = _doubleClickAnimationController
.drive(Tween<double>(begin: begin, end: end));
_doubleClickAnimationListener = () {
state.handleDoubleTap(
scale: _doubleClickAnimation!.value,
doubleTapPosition: pointerDownPosition);
};
_doubleClickAnimation = _doubleClickAnimationController
.drive(Tween<double>(begin: begin, end: end));
_doubleClickAnimation!
.addListener(_doubleClickAnimationListener);
_doubleClickAnimation!
.addListener(_doubleClickAnimationListener);
_doubleClickAnimationController.forward();
},
// ignore: body_might_complete_normally_nullable
loadStateChanged: (ExtendedImageState state) {
if (state.extendedImageLoadState == LoadState.loading) {
final ImageChunkEvent? loadingProgress =
state.loadingProgress;
final double? progress =
loadingProgress?.expectedTotalBytes != null
? loadingProgress!.cumulativeBytesLoaded /
loadingProgress.expectedTotalBytes!
: null;
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
SizedBox(
width: 150.0,
child: LinearProgressIndicator(
value: progress,
color: Colors.white,
_doubleClickAnimationController.forward();
},
// ignore: body_might_complete_normally_nullable
loadStateChanged: (ExtendedImageState state) {
if (state.extendedImageLoadState == LoadState.loading) {
final ImageChunkEvent? loadingProgress =
state.loadingProgress;
final double? progress =
loadingProgress?.expectedTotalBytes != null
? loadingProgress!.cumulativeBytesLoaded /
loadingProgress.expectedTotalBytes!
: null;
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
SizedBox(
width: 150.0,
child: LinearProgressIndicator(
value: progress,
color: Colors.white,
),
),
),
// const SizedBox(height: 10.0),
// Text('${((progress ?? 0.0) * 100).toInt()}%',),
],
),
// const SizedBox(height: 10.0),
// Text('${((progress ?? 0.0) * 100).toInt()}%',),
],
),
);
}
},
initGestureConfigHandler: (ExtendedImageState state) {
return GestureConfig(
inPageView: true,
initialScale: 1.0,
maxScale: 5.0,
animationMaxScale: 6.0,
initialAlignment: InitialAlignment.center,
);
}
},
initGestureConfigHandler: (ExtendedImageState state) {
return GestureConfig(
inPageView: true,
initialScale: 1.0,
maxScale: 5.0,
animationMaxScale: 6.0,
initialAlignment: InitialAlignment.center,
);
},
);
},
},
);
},
),
),
),
Positioned(