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Add a bottom bar for single page viewer

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lifegpc
2025-09-28 21:21:52 +08:00
parent 8d9fe6a2e3
commit 23d6cd5fdb
3 changed files with 221 additions and 25 deletions
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5
lib/l10n/app_en.arb
View File

@@ -37,6 +37,11 @@
"asc": "Ascending",
"desc": "Descending",
"saveAs": "Save As",
"scrollDirection": "Scroll direction",
"scrollDirectionDefault": "Left to right",
"scrollDirectionRtl": "Right to left",
"scrollDirectionDown": "Top to bottom",
"scrollDirectionUp": "Bottom to top",
"posted": "Posted",
"visible": "Visible",
"yes": "Yes",

5
lib/l10n/app_zh.arb
View File

@@ -37,6 +37,11 @@
"asc": "升序",
"desc": "降序",
"saveAs": "另存为",
"scrollDirection": "滚动方向",
"scrollDirectionDefault": "从左往右",
"scrollDirectionRtl": "从右往左",
"scrollDirectionDown": "从上往下",
"scrollDirectionUp": "从下往上",
"posted": "上传时间",
"visible": "可见性",
"yes": "是",

236
lib/viewer/single.dart
View File

@@ -62,9 +62,158 @@ class _SinglePageViewer extends State<SinglePageViewer>
Object? _error;
bool _inited = false;
bool _showMenu = false;
int _scrollMethod = 0;
double? _sliderValue;
late PhotoViewController _photoViewController;
final LruMap<int, (Uint8List, String?, String)> _imgData =
LruMap(maximumSize: 20);
Axis get _scrollAxis => _scrollMethod >= 2 ? Axis.vertical : Axis.horizontal;
bool get _isReverseScroll => _scrollMethod == 1 || _scrollMethod == 3;
void _showPageSettings(BuildContext context) {
final i18n = AppLocalizations.of(context)!;
final options = [
MapEntry(0, i18n.scrollDirectionDefault),
MapEntry(1, i18n.scrollDirectionRtl),
MapEntry(2, i18n.scrollDirectionDown),
MapEntry(3, i18n.scrollDirectionUp)
];
showModalBottomSheet(
context: context,
builder: (sheetContext) {
var selected = _scrollMethod;
return StatefulBuilder(builder: (context, setSheetState) {
return SafeArea(
child: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
ListTile(
dense: true,
title: Text(i18n.scrollDirection),
),
for (final entry in options)
RadioListTile<int>(
title: Text(entry.value),
value: entry.key,
groupValue: selected,
onChanged: (value) async {
if (value == null) return;
setSheetState(() {
selected = value;
});
Navigator.of(sheetContext).pop();
final saved =
await prefs.setInt("single_viewer_scroll_method", value);
if (!saved) {
_log.warning(
"Failed to save single_viewer_scroll_method.");
return;
}
if (!mounted) return;
setState(() {
_scrollMethod = value;
});
})
]));
});
});
}
Widget _buildBottomBar(BuildContext context) {
if (!_showMenu || _pages == null) return Container();
final theme = Theme.of(context);
final textStyle = theme.textTheme.bodyMedium;
final pagesCount = _pages!.length;
if (pagesCount == 0) return Container();
final double maxPage = (pagesCount - 1).toDouble();
final double currentValue =
(_sliderValue ?? _index.toDouble()).clamp(0.0, maxPage).toDouble();
final displayIndex = currentValue.round().clamp(0, pagesCount - 1);
Slider buildSlider() {
return Slider(
value: currentValue,
min: 0,
max: maxPage,
divisions: pagesCount - 1,
onChanged: (value) {
setState(() {
_sliderValue = value;
});
},
onChangeEnd: (value) {
final target = value.round().clamp(0, pagesCount - 1);
if (target != _index) {
_pageController.animateToPage(target,
duration: const Duration(milliseconds: 200),
curve: Curves.easeInOut);
}
setState(() {
_sliderValue = target.toDouble();
});
},
);
}
return Positioned(
left: 0,
right: 0,
bottom: 0,
child: SafeArea(
minimum: const EdgeInsets.all(16),
child: LayoutBuilder(builder: (context, constraints) {
final isWide = constraints.maxWidth > 480;
return Container(
padding: const EdgeInsets.symmetric(
horizontal: 16, vertical: 12),
decoration: BoxDecoration(
color: theme.colorScheme.surface.withOpacity(0.9),
borderRadius: BorderRadius.circular(16)),
child: isWide
? Row(children: [
Text(
"${displayIndex + 1} / $pagesCount",
style: textStyle,
),
if (pagesCount > 1) ...[
const SizedBox(width: 16),
Expanded(child: buildSlider()),
const SizedBox(width: 16),
] else ...[
const Spacer(),
const SizedBox(width: 16),
],
IconButton(
onPressed: () {
_showPageSettings(context);
},
icon: const Icon(Icons.settings))
])
: Column(
mainAxisSize: MainAxisSize.min,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (pagesCount > 1) ...[
buildSlider(),
const SizedBox(height: 12),
],
Row(children: [
Text(
"${displayIndex + 1} / $pagesCount",
style: textStyle,
),
const Spacer(),
IconButton(
onPressed: () {
_showPageSettings(context);
},
icon: const Icon(Icons.settings))
])
],
));
})));
}
void _updatePages() {
if (_data == null) return;
final displayAd = prefs.getBool("displayAd") ?? false;
@@ -76,6 +225,7 @@ class _SinglePageViewer extends State<SinglePageViewer>
_pageController = PageController(initialPage: _index);
_inited = true;
}
_sliderValue = _index.toDouble();
}
@override
@@ -84,6 +234,7 @@ class _SinglePageViewer extends State<SinglePageViewer>
_updatePages();
_files = widget.files;
_back = "/gallery/${widget.gid}";
_scrollMethod = prefs.getInt("single_viewer_scroll_method") ?? 0;
_photoViewController = PhotoViewController();
super.initState();
}
@@ -139,6 +290,8 @@ class _SinglePageViewer extends State<SinglePageViewer>
scrollPhysics: const BouncingScrollPhysics(),
pageController: _pageController,
itemCount: _pages!.length,
scrollDirection: _scrollAxis,
reverse: _isReverseScroll,
builder: (BuildContext context, int index) {
final data = _pages![index];
final f = _files!.files[data.token]!.first;
@@ -160,7 +313,10 @@ class _SinglePageViewer extends State<SinglePageViewer>
);
},
onPageChanged: (index) {
_index = index;
setState(() {
_index = index;
_sliderValue = index.toDouble();
});
SchedulerBinding.instance.addPostFrameCallback((_) {
_onPageChanged(context);
});
@@ -170,26 +326,55 @@ class _SinglePageViewer extends State<SinglePageViewer>
Widget _buildWithKeyboardSupport(BuildContext context,
{required Widget child}) {
void goPrevious() {
if (_index > 0) {
_pageController.previousPage(
duration: const Duration(milliseconds: 200),
curve: Curves.easeInOut);
}
}
void goNext() {
if (_index < _pages!.length - 1) {
_pageController.nextPage(
duration: const Duration(milliseconds: 200),
curve: Curves.easeInOut);
}
}
final bindings = <KeyAction>[];
if (_scrollAxis == Axis.horizontal) {
if (_isReverseScroll) {
bindings.add(KeyAction(
LogicalKeyboardKey.arrowLeft, "next page", () => goNext()));
bindings.add(KeyAction(
LogicalKeyboardKey.arrowRight, "previous page", () => goPrevious()));
} else {
bindings.add(KeyAction(
LogicalKeyboardKey.arrowLeft, "previous page", () => goPrevious()));
bindings.add(KeyAction(
LogicalKeyboardKey.arrowRight, "next page", () => goNext()));
}
} else {
if (_isReverseScroll) {
bindings.add(KeyAction(
LogicalKeyboardKey.arrowUp, "next page", () => goNext()));
bindings.add(KeyAction(
LogicalKeyboardKey.arrowDown, "previous page", () => goPrevious()));
} else {
bindings.add(KeyAction(
LogicalKeyboardKey.arrowUp, "previous page", () => goPrevious()));
bindings.add(KeyAction(
LogicalKeyboardKey.arrowDown, "next page", () => goNext()));
}
}
bindings.add(KeyAction(LogicalKeyboardKey.backspace, "back", () {
context.canPop() ? context.pop() : context.go(_back);
}));
return KeyboardWidget(
bindings: [
KeyAction(LogicalKeyboardKey.arrowLeft, "previous page", () {
if (_index > 0) {
_pageController.previousPage(
duration: const Duration(milliseconds: 200),
curve: Curves.easeInOut);
}
}),
KeyAction(LogicalKeyboardKey.arrowRight, "next page", () {
if (_index < _pages!.length - 1) {
_pageController.nextPage(
duration: const Duration(milliseconds: 200),
curve: Curves.easeInOut);
}
}),
KeyAction(LogicalKeyboardKey.backspace, "back", () {
context.canPop() ? context.pop() : context.go(_back);
}),
],
bindings: bindings,
child: child,
);
}
@@ -254,11 +439,11 @@ class _SinglePageViewer extends State<SinglePageViewer>
title: i18n.saveAs,
callback: () {
try {
platformPath.saveFile(
basenameWithoutExtension(_pages![_index].name),
fmt.toMimeType(),
data,
dir: isAndroid ? widget.gid!.toString() : "");
platformPath.saveFile(
basenameWithoutExtension(_pages![_index].name),
fmt.toMimeType(),
data,
dir: isAndroid ? widget.gid.toString() : "");
} catch (err, stack) {
_log.warning("Failed to save image: $err\n$stack");
}
@@ -360,6 +545,7 @@ class _SinglePageViewer extends State<SinglePageViewer>
body: Stack(children: [
_buildViewer(context),
_buildTopAppBar(context),
_buildBottomBar(context),
]),
);
}