mirror of
https://github.com/immich-app/immich.git
synced 2025-11-04 03:27:09 -05:00
648 lines
19 KiB
Dart
648 lines
19 KiB
Dart
import 'dart:async';
|
|
|
|
import 'package:flutter/material.dart';
|
|
|
|
/// Build the Scroll Thumb and label using the current configuration
|
|
typedef ScrollThumbBuilder = Widget Function(
|
|
Color backgroundColor,
|
|
Animation<double> thumbAnimation,
|
|
Animation<double> labelAnimation,
|
|
double height, {
|
|
Text? labelText,
|
|
BoxConstraints? labelConstraints,
|
|
});
|
|
|
|
/// Build a Text widget using the current scroll offset
|
|
typedef LabelTextBuilder = Text Function(double offsetY);
|
|
|
|
/// A widget that will display a BoxScrollView with a ScrollThumb that can be dragged
|
|
/// for quick navigation of the BoxScrollView.
|
|
class DraggableScrollbar extends StatefulWidget {
|
|
/// The view that will be scrolled with the scroll thumb
|
|
final CustomScrollView child;
|
|
|
|
/// A function that builds a thumb using the current configuration
|
|
final ScrollThumbBuilder scrollThumbBuilder;
|
|
|
|
/// The height of the scroll thumb
|
|
final double heightScrollThumb;
|
|
|
|
/// The background color of the label and thumb
|
|
final Color backgroundColor;
|
|
|
|
/// The amount of padding that should surround the thumb
|
|
final EdgeInsetsGeometry? padding;
|
|
|
|
/// Determines how quickly the scrollbar will animate in and out
|
|
final Duration scrollbarAnimationDuration;
|
|
|
|
/// How long should the thumb be visible before fading out
|
|
final Duration scrollbarTimeToFade;
|
|
|
|
/// Build a Text widget from the current offset in the BoxScrollView
|
|
final LabelTextBuilder? labelTextBuilder;
|
|
|
|
/// Determines box constraints for Container displaying label
|
|
final BoxConstraints? labelConstraints;
|
|
|
|
/// The ScrollController for the BoxScrollView
|
|
final ScrollController controller;
|
|
|
|
/// Determines scrollThumb displaying. If you draw own ScrollThumb and it is true you just don't need to use animation parameters in [scrollThumbBuilder]
|
|
final bool alwaysVisibleScrollThumb;
|
|
|
|
DraggableScrollbar({
|
|
super.key,
|
|
this.alwaysVisibleScrollThumb = false,
|
|
required this.heightScrollThumb,
|
|
required this.backgroundColor,
|
|
required this.scrollThumbBuilder,
|
|
required this.child,
|
|
required this.controller,
|
|
this.padding,
|
|
this.scrollbarAnimationDuration = const Duration(milliseconds: 300),
|
|
this.scrollbarTimeToFade = const Duration(milliseconds: 600),
|
|
this.labelTextBuilder,
|
|
this.labelConstraints,
|
|
}) : assert(child.scrollDirection == Axis.vertical);
|
|
|
|
DraggableScrollbar.rrect({
|
|
super.key,
|
|
Key? scrollThumbKey,
|
|
this.alwaysVisibleScrollThumb = false,
|
|
required this.child,
|
|
required this.controller,
|
|
this.heightScrollThumb = 48.0,
|
|
this.backgroundColor = Colors.white,
|
|
this.padding,
|
|
this.scrollbarAnimationDuration = const Duration(milliseconds: 300),
|
|
this.scrollbarTimeToFade = const Duration(milliseconds: 600),
|
|
this.labelTextBuilder,
|
|
this.labelConstraints,
|
|
}) : assert(child.scrollDirection == Axis.vertical),
|
|
scrollThumbBuilder =
|
|
_thumbRRectBuilder(scrollThumbKey, alwaysVisibleScrollThumb);
|
|
|
|
DraggableScrollbar.arrows({
|
|
super.key,
|
|
Key? scrollThumbKey,
|
|
this.alwaysVisibleScrollThumb = false,
|
|
required this.child,
|
|
required this.controller,
|
|
this.heightScrollThumb = 48.0,
|
|
this.backgroundColor = Colors.white,
|
|
this.padding,
|
|
this.scrollbarAnimationDuration = const Duration(milliseconds: 300),
|
|
this.scrollbarTimeToFade = const Duration(milliseconds: 600),
|
|
this.labelTextBuilder,
|
|
this.labelConstraints,
|
|
}) : assert(child.scrollDirection == Axis.vertical),
|
|
scrollThumbBuilder =
|
|
_thumbArrowBuilder(scrollThumbKey, alwaysVisibleScrollThumb);
|
|
|
|
DraggableScrollbar.semicircle({
|
|
super.key,
|
|
Key? scrollThumbKey,
|
|
this.alwaysVisibleScrollThumb = false,
|
|
required this.child,
|
|
required this.controller,
|
|
this.heightScrollThumb = 48.0,
|
|
this.backgroundColor = Colors.white,
|
|
this.padding,
|
|
this.scrollbarAnimationDuration = const Duration(milliseconds: 300),
|
|
this.scrollbarTimeToFade = const Duration(milliseconds: 600),
|
|
this.labelTextBuilder,
|
|
this.labelConstraints,
|
|
}) : assert(child.scrollDirection == Axis.vertical),
|
|
scrollThumbBuilder = _thumbSemicircleBuilder(
|
|
heightScrollThumb * 0.6,
|
|
scrollThumbKey,
|
|
alwaysVisibleScrollThumb,
|
|
);
|
|
|
|
@override
|
|
DraggableScrollbarState createState() => DraggableScrollbarState();
|
|
|
|
static buildScrollThumbAndLabel({
|
|
required Widget scrollThumb,
|
|
required Color backgroundColor,
|
|
required Animation<double>? thumbAnimation,
|
|
required Animation<double>? labelAnimation,
|
|
required Text? labelText,
|
|
required BoxConstraints? labelConstraints,
|
|
required bool alwaysVisibleScrollThumb,
|
|
}) {
|
|
var scrollThumbAndLabel = labelText == null
|
|
? scrollThumb
|
|
: Row(
|
|
mainAxisSize: MainAxisSize.min,
|
|
mainAxisAlignment: MainAxisAlignment.end,
|
|
children: [
|
|
ScrollLabel(
|
|
animation: labelAnimation,
|
|
backgroundColor: backgroundColor,
|
|
constraints: labelConstraints,
|
|
child: labelText,
|
|
),
|
|
scrollThumb,
|
|
],
|
|
);
|
|
|
|
if (alwaysVisibleScrollThumb) {
|
|
return scrollThumbAndLabel;
|
|
}
|
|
return SlideFadeTransition(
|
|
animation: thumbAnimation!,
|
|
child: scrollThumbAndLabel,
|
|
);
|
|
}
|
|
|
|
static ScrollThumbBuilder _thumbSemicircleBuilder(
|
|
double width,
|
|
Key? scrollThumbKey,
|
|
bool alwaysVisibleScrollThumb,
|
|
) {
|
|
return (
|
|
Color backgroundColor,
|
|
Animation<double> thumbAnimation,
|
|
Animation<double> labelAnimation,
|
|
double height, {
|
|
Text? labelText,
|
|
BoxConstraints? labelConstraints,
|
|
}) {
|
|
final scrollThumb = CustomPaint(
|
|
key: scrollThumbKey,
|
|
foregroundPainter: ArrowCustomPainter(Colors.white),
|
|
child: Material(
|
|
elevation: 4.0,
|
|
color: backgroundColor,
|
|
borderRadius: BorderRadius.only(
|
|
topLeft: Radius.circular(height),
|
|
bottomLeft: Radius.circular(height),
|
|
topRight: const Radius.circular(4.0),
|
|
bottomRight: const Radius.circular(4.0),
|
|
),
|
|
child: Container(
|
|
constraints: BoxConstraints.tight(Size(width, height)),
|
|
),
|
|
),
|
|
);
|
|
|
|
return buildScrollThumbAndLabel(
|
|
scrollThumb: scrollThumb,
|
|
backgroundColor: backgroundColor,
|
|
thumbAnimation: thumbAnimation,
|
|
labelAnimation: labelAnimation,
|
|
labelText: labelText,
|
|
labelConstraints: labelConstraints,
|
|
alwaysVisibleScrollThumb: alwaysVisibleScrollThumb,
|
|
);
|
|
};
|
|
}
|
|
|
|
static ScrollThumbBuilder _thumbArrowBuilder(
|
|
Key? scrollThumbKey,
|
|
bool alwaysVisibleScrollThumb,
|
|
) {
|
|
return (
|
|
Color backgroundColor,
|
|
Animation<double> thumbAnimation,
|
|
Animation<double> labelAnimation,
|
|
double height, {
|
|
Text? labelText,
|
|
BoxConstraints? labelConstraints,
|
|
}) {
|
|
final scrollThumb = ClipPath(
|
|
clipper: ArrowClipper(),
|
|
child: Container(
|
|
height: height,
|
|
width: 20.0,
|
|
decoration: BoxDecoration(
|
|
color: backgroundColor,
|
|
borderRadius: const BorderRadius.all(
|
|
Radius.circular(12.0),
|
|
),
|
|
),
|
|
),
|
|
);
|
|
|
|
return buildScrollThumbAndLabel(
|
|
scrollThumb: scrollThumb,
|
|
backgroundColor: backgroundColor,
|
|
thumbAnimation: thumbAnimation,
|
|
labelAnimation: labelAnimation,
|
|
labelText: labelText,
|
|
labelConstraints: labelConstraints,
|
|
alwaysVisibleScrollThumb: alwaysVisibleScrollThumb,
|
|
);
|
|
};
|
|
}
|
|
|
|
static ScrollThumbBuilder _thumbRRectBuilder(
|
|
Key? scrollThumbKey,
|
|
bool alwaysVisibleScrollThumb,
|
|
) {
|
|
return (
|
|
Color backgroundColor,
|
|
Animation<double> thumbAnimation,
|
|
Animation<double> labelAnimation,
|
|
double height, {
|
|
Text? labelText,
|
|
BoxConstraints? labelConstraints,
|
|
}) {
|
|
final scrollThumb = Material(
|
|
elevation: 4.0,
|
|
color: backgroundColor,
|
|
borderRadius: const BorderRadius.all(Radius.circular(7.0)),
|
|
child: Container(
|
|
constraints: BoxConstraints.tight(
|
|
Size(16.0, height),
|
|
),
|
|
),
|
|
);
|
|
|
|
return buildScrollThumbAndLabel(
|
|
scrollThumb: scrollThumb,
|
|
backgroundColor: backgroundColor,
|
|
thumbAnimation: thumbAnimation,
|
|
labelAnimation: labelAnimation,
|
|
labelText: labelText,
|
|
labelConstraints: labelConstraints,
|
|
alwaysVisibleScrollThumb: alwaysVisibleScrollThumb,
|
|
);
|
|
};
|
|
}
|
|
}
|
|
|
|
class ScrollLabel extends StatelessWidget {
|
|
final Animation<double>? animation;
|
|
final Color backgroundColor;
|
|
final Text child;
|
|
|
|
final BoxConstraints? constraints;
|
|
static const BoxConstraints _defaultConstraints =
|
|
BoxConstraints.tightFor(width: 72.0, height: 28.0);
|
|
|
|
const ScrollLabel({
|
|
super.key,
|
|
required this.child,
|
|
required this.animation,
|
|
required this.backgroundColor,
|
|
this.constraints = _defaultConstraints,
|
|
});
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return FadeTransition(
|
|
opacity: animation!,
|
|
child: Container(
|
|
margin: const EdgeInsets.only(right: 12.0),
|
|
child: Material(
|
|
elevation: 4.0,
|
|
color: backgroundColor,
|
|
borderRadius: const BorderRadius.all(Radius.circular(16.0)),
|
|
child: Container(
|
|
constraints: constraints ?? _defaultConstraints,
|
|
alignment: Alignment.center,
|
|
child: child,
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|
|
|
|
class DraggableScrollbarState extends State<DraggableScrollbar>
|
|
with TickerProviderStateMixin {
|
|
late double _barOffset;
|
|
late double _viewOffset;
|
|
late bool _isDragInProcess;
|
|
|
|
late AnimationController _thumbAnimationController;
|
|
late Animation<double> _thumbAnimation;
|
|
late AnimationController _labelAnimationController;
|
|
late Animation<double> _labelAnimation;
|
|
Timer? _fadeoutTimer;
|
|
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
_barOffset = 0.0;
|
|
_viewOffset = 0.0;
|
|
_isDragInProcess = false;
|
|
|
|
_thumbAnimationController = AnimationController(
|
|
vsync: this,
|
|
duration: widget.scrollbarAnimationDuration,
|
|
);
|
|
|
|
_thumbAnimation = CurvedAnimation(
|
|
parent: _thumbAnimationController,
|
|
curve: Curves.fastOutSlowIn,
|
|
);
|
|
|
|
_labelAnimationController = AnimationController(
|
|
vsync: this,
|
|
duration: widget.scrollbarAnimationDuration,
|
|
);
|
|
|
|
_labelAnimation = CurvedAnimation(
|
|
parent: _labelAnimationController,
|
|
curve: Curves.fastOutSlowIn,
|
|
);
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
_thumbAnimationController.dispose();
|
|
_labelAnimationController.dispose();
|
|
_fadeoutTimer?.cancel();
|
|
super.dispose();
|
|
}
|
|
|
|
double get barMaxScrollExtent =>
|
|
context.size!.height - widget.heightScrollThumb;
|
|
|
|
double get barMinScrollExtent => 0;
|
|
|
|
double get viewMaxScrollExtent => widget.controller.position.maxScrollExtent;
|
|
|
|
double get viewMinScrollExtent => widget.controller.position.minScrollExtent;
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
Text? labelText;
|
|
if (widget.labelTextBuilder != null && _isDragInProcess) {
|
|
labelText = widget.labelTextBuilder!(
|
|
_viewOffset + _barOffset + widget.heightScrollThumb / 2,
|
|
);
|
|
}
|
|
|
|
return LayoutBuilder(
|
|
builder: (BuildContext context, BoxConstraints constraints) {
|
|
//print("LayoutBuilder constraints=$constraints");
|
|
|
|
return NotificationListener<ScrollNotification>(
|
|
onNotification: (ScrollNotification notification) {
|
|
changePosition(notification);
|
|
return false;
|
|
},
|
|
child: Stack(
|
|
children: <Widget>[
|
|
RepaintBoundary(
|
|
child: widget.child,
|
|
),
|
|
RepaintBoundary(
|
|
child: GestureDetector(
|
|
onVerticalDragStart: _onVerticalDragStart,
|
|
onVerticalDragUpdate: _onVerticalDragUpdate,
|
|
onVerticalDragEnd: _onVerticalDragEnd,
|
|
child: Container(
|
|
alignment: Alignment.topRight,
|
|
margin: EdgeInsets.only(top: _barOffset),
|
|
padding: widget.padding,
|
|
child: widget.scrollThumbBuilder(
|
|
widget.backgroundColor,
|
|
_thumbAnimation,
|
|
_labelAnimation,
|
|
widget.heightScrollThumb,
|
|
labelText: labelText,
|
|
labelConstraints: widget.labelConstraints,
|
|
),
|
|
),
|
|
),
|
|
),
|
|
],
|
|
),
|
|
);
|
|
},
|
|
);
|
|
}
|
|
|
|
//scroll bar has received notification that it's view was scrolled
|
|
//so it should also changes his position
|
|
//but only if it isn't dragged
|
|
changePosition(ScrollNotification notification) {
|
|
if (_isDragInProcess) {
|
|
return;
|
|
}
|
|
|
|
setState(() {
|
|
if (notification is ScrollUpdateNotification) {
|
|
_barOffset += getBarDelta(
|
|
notification.scrollDelta!,
|
|
barMaxScrollExtent,
|
|
viewMaxScrollExtent,
|
|
);
|
|
|
|
if (_barOffset < barMinScrollExtent) {
|
|
_barOffset = barMinScrollExtent;
|
|
}
|
|
if (_barOffset > barMaxScrollExtent) {
|
|
_barOffset = barMaxScrollExtent;
|
|
}
|
|
|
|
_viewOffset += notification.scrollDelta!;
|
|
if (_viewOffset < widget.controller.position.minScrollExtent) {
|
|
_viewOffset = widget.controller.position.minScrollExtent;
|
|
}
|
|
if (_viewOffset > viewMaxScrollExtent) {
|
|
_viewOffset = viewMaxScrollExtent;
|
|
}
|
|
}
|
|
|
|
if (notification is ScrollUpdateNotification ||
|
|
notification is OverscrollNotification) {
|
|
if (_thumbAnimationController.status != AnimationStatus.forward) {
|
|
_thumbAnimationController.forward();
|
|
}
|
|
|
|
_fadeoutTimer?.cancel();
|
|
_fadeoutTimer = Timer(widget.scrollbarTimeToFade, () {
|
|
_thumbAnimationController.reverse();
|
|
_labelAnimationController.reverse();
|
|
_fadeoutTimer = null;
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
double getBarDelta(
|
|
double scrollViewDelta,
|
|
double barMaxScrollExtent,
|
|
double viewMaxScrollExtent,
|
|
) {
|
|
return scrollViewDelta * barMaxScrollExtent / viewMaxScrollExtent;
|
|
}
|
|
|
|
double getScrollViewDelta(
|
|
double barDelta,
|
|
double barMaxScrollExtent,
|
|
double viewMaxScrollExtent,
|
|
) {
|
|
return barDelta * viewMaxScrollExtent / barMaxScrollExtent;
|
|
}
|
|
|
|
void _onVerticalDragStart(DragStartDetails details) {
|
|
setState(() {
|
|
_isDragInProcess = true;
|
|
_labelAnimationController.forward();
|
|
_fadeoutTimer?.cancel();
|
|
});
|
|
}
|
|
|
|
void _onVerticalDragUpdate(DragUpdateDetails details) {
|
|
setState(() {
|
|
if (_thumbAnimationController.status != AnimationStatus.forward) {
|
|
_thumbAnimationController.forward();
|
|
}
|
|
if (_isDragInProcess) {
|
|
_barOffset += details.delta.dy;
|
|
|
|
if (_barOffset < barMinScrollExtent) {
|
|
_barOffset = barMinScrollExtent;
|
|
}
|
|
if (_barOffset > barMaxScrollExtent) {
|
|
_barOffset = barMaxScrollExtent;
|
|
}
|
|
|
|
double viewDelta = getScrollViewDelta(
|
|
details.delta.dy,
|
|
barMaxScrollExtent,
|
|
viewMaxScrollExtent,
|
|
);
|
|
|
|
_viewOffset = widget.controller.position.pixels + viewDelta;
|
|
if (_viewOffset < widget.controller.position.minScrollExtent) {
|
|
_viewOffset = widget.controller.position.minScrollExtent;
|
|
}
|
|
if (_viewOffset > viewMaxScrollExtent) {
|
|
_viewOffset = viewMaxScrollExtent;
|
|
}
|
|
widget.controller.jumpTo(_viewOffset);
|
|
}
|
|
});
|
|
}
|
|
|
|
void _onVerticalDragEnd(DragEndDetails details) {
|
|
_fadeoutTimer = Timer(widget.scrollbarTimeToFade, () {
|
|
_thumbAnimationController.reverse();
|
|
_labelAnimationController.reverse();
|
|
_fadeoutTimer = null;
|
|
});
|
|
setState(() {
|
|
_isDragInProcess = false;
|
|
});
|
|
}
|
|
}
|
|
|
|
/// Draws 2 triangles like arrow up and arrow down
|
|
class ArrowCustomPainter extends CustomPainter {
|
|
Color color;
|
|
|
|
ArrowCustomPainter(this.color);
|
|
|
|
@override
|
|
bool shouldRepaint(covariant CustomPainter oldDelegate) => false;
|
|
|
|
@override
|
|
void paint(Canvas canvas, Size size) {
|
|
final paint = Paint()..color = color;
|
|
const width = 12.0;
|
|
const height = 8.0;
|
|
final baseX = size.width / 2;
|
|
final baseY = size.height / 2;
|
|
|
|
canvas.drawPath(
|
|
_trianglePath(Offset(baseX, baseY - 2.0), width, height, true),
|
|
paint,
|
|
);
|
|
canvas.drawPath(
|
|
_trianglePath(Offset(baseX, baseY + 2.0), width, height, false),
|
|
paint,
|
|
);
|
|
}
|
|
|
|
static Path _trianglePath(Offset o, double width, double height, bool isUp) {
|
|
return Path()
|
|
..moveTo(o.dx, o.dy)
|
|
..lineTo(o.dx + width, o.dy)
|
|
..lineTo(o.dx + (width / 2), isUp ? o.dy - height : o.dy + height)
|
|
..close();
|
|
}
|
|
}
|
|
|
|
///This cut 2 lines in arrow shape
|
|
class ArrowClipper extends CustomClipper<Path> {
|
|
@override
|
|
Path getClip(Size size) {
|
|
Path path = Path();
|
|
path.lineTo(0.0, size.height);
|
|
path.lineTo(size.width, size.height);
|
|
path.lineTo(size.width, 0.0);
|
|
path.lineTo(0.0, 0.0);
|
|
path.close();
|
|
|
|
double arrowWidth = 8.0;
|
|
double startPointX = (size.width - arrowWidth) / 2;
|
|
double startPointY = size.height / 2 - arrowWidth / 2;
|
|
path.moveTo(startPointX, startPointY);
|
|
path.lineTo(startPointX + arrowWidth / 2, startPointY - arrowWidth / 2);
|
|
path.lineTo(startPointX + arrowWidth, startPointY);
|
|
path.lineTo(startPointX + arrowWidth, startPointY + 1.0);
|
|
path.lineTo(
|
|
startPointX + arrowWidth / 2,
|
|
startPointY - arrowWidth / 2 + 1.0,
|
|
);
|
|
path.lineTo(startPointX, startPointY + 1.0);
|
|
path.close();
|
|
|
|
startPointY = size.height / 2 + arrowWidth / 2;
|
|
path.moveTo(startPointX + arrowWidth, startPointY);
|
|
path.lineTo(startPointX + arrowWidth / 2, startPointY + arrowWidth / 2);
|
|
path.lineTo(startPointX, startPointY);
|
|
path.lineTo(startPointX, startPointY - 1.0);
|
|
path.lineTo(
|
|
startPointX + arrowWidth / 2,
|
|
startPointY + arrowWidth / 2 - 1.0,
|
|
);
|
|
path.lineTo(startPointX + arrowWidth, startPointY - 1.0);
|
|
path.close();
|
|
|
|
return path;
|
|
}
|
|
|
|
@override
|
|
bool shouldReclip(CustomClipper<Path> oldClipper) => false;
|
|
}
|
|
|
|
class SlideFadeTransition extends StatelessWidget {
|
|
final Animation<double> animation;
|
|
final Widget child;
|
|
|
|
const SlideFadeTransition({
|
|
super.key,
|
|
required this.animation,
|
|
required this.child,
|
|
});
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
return AnimatedBuilder(
|
|
animation: animation,
|
|
builder: (context, child) =>
|
|
animation.value == 0.0 ? const SizedBox() : child!,
|
|
child: SlideTransition(
|
|
position: Tween(
|
|
begin: const Offset(0.3, 0.0),
|
|
end: const Offset(0.0, 0.0),
|
|
).animate(animation),
|
|
child: FadeTransition(
|
|
opacity: animation,
|
|
child: child,
|
|
),
|
|
),
|
|
);
|
|
}
|
|
}
|