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fullscreen: fixed scale state monitoring on entry change

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This commit is contained in:
Thibault Deckers 2020-05-18 16:15:45 +09:00
parent aa84512107
commit e2cb03909a
1 changed files with 19 additions and 9 deletions
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28
lib/widgets/fullscreen/fullscreen_body.dart
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@ -404,6 +404,9 @@ class _FullscreenVerticalPageViewState extends State<FullscreenVerticalPageView>
super.didUpdateWidget(oldWidget);
_unregisterWidget(oldWidget);
_registerWidget(widget);
if (oldWidget.entry != widget.entry) {
_onEntryChanged();
}
}
@override
@ -413,18 +416,17 @@ class _FullscreenVerticalPageViewState extends State<FullscreenVerticalPageView>
}
void _registerWidget(FullscreenVerticalPageView widget) {
widget.verticalPager.addListener(_onVerticalPageControllerChange);
widget.entry.imageChangeNotifier.addListener(_onImageChange);
widget.verticalPager.addListener(_onVerticalPageControllerChanged);
widget.entry.imageChangeNotifier.addListener(_onImageChanged);
}
void _unregisterWidget(FullscreenVerticalPageView widget) {
widget.verticalPager.removeListener(_onVerticalPageControllerChange);
widget.entry.imageChangeNotifier.removeListener(_onImageChange);
widget.verticalPager.removeListener(_onVerticalPageControllerChanged);
widget.entry.imageChangeNotifier.removeListener(_onImageChanged);
}
@override
Widget build(BuildContext context) {
final onScaleChanged = (state) => setState(() => _isInitialScale = state == PhotoViewScaleState.initial);
final pages = [
// fake page for opacity transition between collection and fullscreen views
const SizedBox(),
@ -434,12 +436,12 @@ class _FullscreenVerticalPageViewState extends State<FullscreenVerticalPageView>
pageController: widget.horizontalPager,
onTap: widget.onImageTap,
onPageChanged: widget.onHorizontalPageChanged,
onScaleChanged: onScaleChanged,
onScaleChanged: _onScaleChanged,
videoControllers: widget.videoControllers,
)
: SingleImagePage(
entry: entry,
onScaleChanged: onScaleChanged,
onScaleChanged: _onScaleChanged,
onTap: widget.onImageTap,
videoControllers: widget.videoControllers,
),
@ -474,12 +476,20 @@ class _FullscreenVerticalPageViewState extends State<FullscreenVerticalPageView>
);
}
void _onVerticalPageControllerChange() {
void _onVerticalPageControllerChanged() {
final opacity = min(1.0, widget.verticalPager.page);
_backgroundColorNotifier.value = _backgroundColorNotifier.value.withOpacity(opacity * opacity);
}
void _onImageChange() async {
void _onEntryChanged() {
_onScaleChanged(PhotoViewScaleState.initial);
}
void _onScaleChanged(PhotoViewScaleState state) {
setState(() => _isInitialScale = state == PhotoViewScaleState.initial);
}
void _onImageChanged() async {
await UriImage(uri: entry.uri, mimeType: entry.mimeType).evict();
await ThumbnailProvider(entry: entry, extent: Constants.thumbnailCacheExtent).evict();
if (entry.path != null) await FileImage(File(entry.path)).evict();