mirror of
https://github.com/immich-app/immich.git
synced 2024-12-29 11:24:37 +02:00
660 lines
22 KiB
Dart
660 lines
22 KiB
Dart
library photo_view;
|
|
|
|
import 'package:flutter/material.dart';
|
|
|
|
import 'package:immich_mobile/shared/ui/photo_view/src/controller/photo_view_controller.dart';
|
|
import 'package:immich_mobile/shared/ui/photo_view/src/controller/photo_view_scalestate_controller.dart';
|
|
import 'package:immich_mobile/shared/ui/photo_view/src/core/photo_view_core.dart';
|
|
import 'package:immich_mobile/shared/ui/photo_view/src/photo_view_computed_scale.dart';
|
|
import 'package:immich_mobile/shared/ui/photo_view/src/photo_view_scale_state.dart';
|
|
import 'package:immich_mobile/shared/ui/photo_view/src/photo_view_wrappers.dart';
|
|
import 'package:immich_mobile/shared/ui/photo_view/src/utils/photo_view_hero_attributes.dart';
|
|
|
|
export 'src/controller/photo_view_controller.dart';
|
|
export 'src/controller/photo_view_scalestate_controller.dart';
|
|
export 'src/core/photo_view_gesture_detector.dart'
|
|
show PhotoViewGestureDetectorScope, PhotoViewPageViewScrollPhysics;
|
|
export 'src/photo_view_computed_scale.dart';
|
|
export 'src/photo_view_scale_state.dart';
|
|
export 'src/utils/photo_view_hero_attributes.dart';
|
|
|
|
/// A [StatefulWidget] that contains all the photo view rendering elements.
|
|
///
|
|
/// Sample code to use within an image:
|
|
///
|
|
/// ```
|
|
/// PhotoView(
|
|
/// imageProvider: imageProvider,
|
|
/// loadingBuilder: (context, progress) => Center(
|
|
/// child: Container(
|
|
/// width: 20.0,
|
|
/// height: 20.0,
|
|
/// child: CircularProgressIndicator(
|
|
/// value: _progress == null
|
|
/// ? null
|
|
/// : _progress.cumulativeBytesLoaded /
|
|
/// _progress.expectedTotalBytes,
|
|
/// ),
|
|
/// ),
|
|
/// ),
|
|
/// backgroundDecoration: BoxDecoration(color: Colors.black),
|
|
/// gaplessPlayback: false,
|
|
/// customSize: MediaQuery.of(context).size,
|
|
/// heroAttributes: const HeroAttributes(
|
|
/// tag: "someTag",
|
|
/// transitionOnUserGestures: true,
|
|
/// ),
|
|
/// scaleStateChangedCallback: this.onScaleStateChanged,
|
|
/// enableRotation: true,
|
|
/// controller: controller,
|
|
/// minScale: PhotoViewComputedScale.contained * 0.8,
|
|
/// maxScale: PhotoViewComputedScale.covered * 1.8,
|
|
/// initialScale: PhotoViewComputedScale.contained,
|
|
/// basePosition: Alignment.center,
|
|
/// scaleStateCycle: scaleStateCycle
|
|
/// );
|
|
/// ```
|
|
///
|
|
/// You can customize to show an custom child instead of an image:
|
|
///
|
|
/// ```
|
|
/// PhotoView.customChild(
|
|
/// child: Container(
|
|
/// width: 220.0,
|
|
/// height: 250.0,
|
|
/// child: const Text(
|
|
/// "Hello there, this is a text",
|
|
/// )
|
|
/// ),
|
|
/// childSize: const Size(220.0, 250.0),
|
|
/// backgroundDecoration: BoxDecoration(color: Colors.black),
|
|
/// gaplessPlayback: false,
|
|
/// customSize: MediaQuery.of(context).size,
|
|
/// heroAttributes: const HeroAttributes(
|
|
/// tag: "someTag",
|
|
/// transitionOnUserGestures: true,
|
|
/// ),
|
|
/// scaleStateChangedCallback: this.onScaleStateChanged,
|
|
/// enableRotation: true,
|
|
/// controller: controller,
|
|
/// minScale: PhotoViewComputedScale.contained * 0.8,
|
|
/// maxScale: PhotoViewComputedScale.covered * 1.8,
|
|
/// initialScale: PhotoViewComputedScale.contained,
|
|
/// basePosition: Alignment.center,
|
|
/// scaleStateCycle: scaleStateCycle
|
|
/// );
|
|
/// ```
|
|
/// The [maxScale], [minScale] and [initialScale] options may be [double] or a [PhotoViewComputedScale] constant
|
|
///
|
|
/// Sample using [maxScale], [minScale] and [initialScale]
|
|
///
|
|
/// ```
|
|
/// PhotoView(
|
|
/// imageProvider: imageProvider,
|
|
/// minScale: PhotoViewComputedScale.contained * 0.8,
|
|
/// maxScale: PhotoViewComputedScale.covered * 1.8,
|
|
/// initialScale: PhotoViewComputedScale.contained * 1.1,
|
|
/// );
|
|
/// ```
|
|
///
|
|
/// [customSize] is used to define the viewPort size in which the image will be
|
|
/// scaled to. This argument is rarely used. By default is the size that this widget assumes.
|
|
///
|
|
/// The argument [gaplessPlayback] is used to continue showing the old image
|
|
/// (`true`), or briefly show nothing (`false`), when the [imageProvider]
|
|
/// changes.By default it's set to `false`.
|
|
///
|
|
/// To use within an hero animation, specify [heroAttributes]. When
|
|
/// [heroAttributes] is specified, the image provider retrieval process should
|
|
/// be sync.
|
|
///
|
|
/// Sample using hero animation:
|
|
/// ```
|
|
/// // screen1
|
|
/// ...
|
|
/// Hero(
|
|
/// tag: "someTag",
|
|
/// child: Image.asset(
|
|
/// "assets/large-image.jpg",
|
|
/// width: 150.0
|
|
/// ),
|
|
/// )
|
|
/// // screen2
|
|
/// ...
|
|
/// child: PhotoView(
|
|
/// imageProvider: AssetImage("assets/large-image.jpg"),
|
|
/// heroAttributes: const HeroAttributes(tag: "someTag"),
|
|
/// )
|
|
/// ```
|
|
///
|
|
/// **Note: If you don't want to the zoomed image do not overlaps the size of the container, use [ClipRect](https://docs.flutter.io/flutter/widgets/ClipRect-class.html)**
|
|
///
|
|
/// ## Controllers
|
|
///
|
|
/// Controllers, when specified to PhotoView widget, enables the author(you) to listen for state updates through a `Stream` and change those values externally.
|
|
///
|
|
/// While [PhotoViewScaleStateController] is only responsible for the `scaleState`, [PhotoViewController] is responsible for all fields os [PhotoViewControllerValue].
|
|
///
|
|
/// To use them, pass a instance of those items on [controller] or [scaleStateController];
|
|
///
|
|
/// Since those follows the standard controller pattern found in widgets like [PageView] and [ScrollView], whoever instantiates it, should [dispose] it afterwards.
|
|
///
|
|
/// Example of [controller] usage, only listening for state changes:
|
|
///
|
|
/// ```
|
|
/// class _ExampleWidgetState extends State<ExampleWidget> {
|
|
///
|
|
/// PhotoViewController controller;
|
|
/// double scaleCopy;
|
|
///
|
|
/// @override
|
|
/// void initState() {
|
|
/// super.initState();
|
|
/// controller = PhotoViewController()
|
|
/// ..outputStateStream.listen(listener);
|
|
/// }
|
|
///
|
|
/// @override
|
|
/// void dispose() {
|
|
/// controller.dispose();
|
|
/// super.dispose();
|
|
/// }
|
|
///
|
|
/// void listener(PhotoViewControllerValue value){
|
|
/// setState((){
|
|
/// scaleCopy = value.scale;
|
|
/// })
|
|
/// }
|
|
///
|
|
/// @override
|
|
/// Widget build(BuildContext context) {
|
|
/// return Stack(
|
|
/// children: <Widget>[
|
|
/// Positioned.fill(
|
|
/// child: PhotoView(
|
|
/// imageProvider: AssetImage("assets/pudim.png"),
|
|
/// controller: controller,
|
|
/// );
|
|
/// ),
|
|
/// Text("Scale applied: $scaleCopy")
|
|
/// ],
|
|
/// );
|
|
/// }
|
|
/// }
|
|
/// ```
|
|
///
|
|
/// An example of [scaleStateController] with state changes:
|
|
/// ```
|
|
/// class _ExampleWidgetState extends State<ExampleWidget> {
|
|
///
|
|
/// PhotoViewScaleStateController scaleStateController;
|
|
///
|
|
/// @override
|
|
/// void initState() {
|
|
/// super.initState();
|
|
/// scaleStateController = PhotoViewScaleStateController();
|
|
/// }
|
|
///
|
|
/// @override
|
|
/// void dispose() {
|
|
/// scaleStateController.dispose();
|
|
/// super.dispose();
|
|
/// }
|
|
///
|
|
/// void goBack(){
|
|
/// scaleStateController.scaleState = PhotoViewScaleState.originalSize;
|
|
/// }
|
|
///
|
|
/// @override
|
|
/// Widget build(BuildContext context) {
|
|
/// return Stack(
|
|
/// children: <Widget>[
|
|
/// Positioned.fill(
|
|
/// child: PhotoView(
|
|
/// imageProvider: AssetImage("assets/pudim.png"),
|
|
/// scaleStateController: scaleStateController,
|
|
/// );
|
|
/// ),
|
|
/// FlatButton(
|
|
/// child: Text("Go to original size"),
|
|
/// onPressed: goBack,
|
|
/// );
|
|
/// ],
|
|
/// );
|
|
/// }
|
|
/// }
|
|
/// ```
|
|
///
|
|
class PhotoView extends StatefulWidget {
|
|
/// Creates a widget that displays a zoomable image.
|
|
///
|
|
/// To show an image from the network or from an asset bundle, use their respective
|
|
/// image providers, ie: [AssetImage] or [NetworkImage]
|
|
///
|
|
/// Internally, the image is rendered within an [Image] widget.
|
|
const PhotoView({
|
|
Key? key,
|
|
required this.imageProvider,
|
|
required this.index,
|
|
this.loadingBuilder,
|
|
this.backgroundDecoration,
|
|
this.wantKeepAlive = false,
|
|
this.gaplessPlayback = false,
|
|
this.heroAttributes,
|
|
this.scaleStateChangedCallback,
|
|
this.enableRotation = false,
|
|
this.controller,
|
|
this.scaleStateController,
|
|
this.maxScale,
|
|
this.minScale,
|
|
this.initialScale,
|
|
this.basePosition,
|
|
this.scaleStateCycle,
|
|
this.onTapUp,
|
|
this.onTapDown,
|
|
this.onDragStart,
|
|
this.onDragEnd,
|
|
this.onDragUpdate,
|
|
this.onScaleEnd,
|
|
this.customSize,
|
|
this.gestureDetectorBehavior,
|
|
this.tightMode,
|
|
this.filterQuality,
|
|
this.disableGestures,
|
|
this.errorBuilder,
|
|
this.enablePanAlways,
|
|
}) : child = null,
|
|
childSize = null,
|
|
super(key: key);
|
|
|
|
/// Creates a widget that displays a zoomable child.
|
|
///
|
|
/// It has been created to resemble [PhotoView] behavior within widgets that aren't an image, such as [Container], [Text] or a svg.
|
|
///
|
|
/// Instead of a [imageProvider], this constructor will receive a [child] and a [childSize].
|
|
///
|
|
const PhotoView.customChild({
|
|
Key? key,
|
|
required this.child,
|
|
this.childSize,
|
|
this.backgroundDecoration,
|
|
this.wantKeepAlive = false,
|
|
this.heroAttributes,
|
|
this.scaleStateChangedCallback,
|
|
this.enableRotation = false,
|
|
this.controller,
|
|
this.scaleStateController,
|
|
this.maxScale,
|
|
this.minScale,
|
|
this.initialScale,
|
|
this.basePosition,
|
|
this.scaleStateCycle,
|
|
this.onTapUp,
|
|
this.onTapDown,
|
|
this.onDragStart,
|
|
this.onDragEnd,
|
|
this.onDragUpdate,
|
|
this.onScaleEnd,
|
|
this.customSize,
|
|
this.gestureDetectorBehavior,
|
|
this.tightMode,
|
|
this.filterQuality,
|
|
this.disableGestures,
|
|
this.enablePanAlways,
|
|
}) : errorBuilder = null,
|
|
imageProvider = null,
|
|
gaplessPlayback = false,
|
|
loadingBuilder = null,
|
|
index = 0,
|
|
super(key: key);
|
|
|
|
/// Given a [imageProvider] it resolves into an zoomable image widget using. It
|
|
/// is required
|
|
final ImageProvider? imageProvider;
|
|
|
|
/// While [imageProvider] is not resolved, [loadingBuilder] is called by [PhotoView]
|
|
/// into the screen, by default it is a centered [CircularProgressIndicator]
|
|
final LoadingBuilder? loadingBuilder;
|
|
|
|
/// Show loadFailedChild when the image failed to load
|
|
final ImageErrorWidgetBuilder? errorBuilder;
|
|
|
|
/// Changes the background behind image, defaults to `Colors.black`.
|
|
final BoxDecoration? backgroundDecoration;
|
|
|
|
/// This is used to keep the state of an image in the gallery (e.g. scale state).
|
|
/// `false` -> resets the state (default)
|
|
/// `true` -> keeps the state
|
|
final bool wantKeepAlive;
|
|
|
|
/// This is used to continue showing the old image (`true`), or briefly show
|
|
/// nothing (`false`), when the `imageProvider` changes. By default it's set
|
|
/// to `false`.
|
|
final bool gaplessPlayback;
|
|
|
|
/// Attributes that are going to be passed to [PhotoViewCore]'s
|
|
/// [Hero]. Leave this property undefined if you don't want a hero animation.
|
|
final PhotoViewHeroAttributes? heroAttributes;
|
|
|
|
/// Defines the size of the scaling base of the image inside [PhotoView],
|
|
/// by default it is `MediaQuery.of(context).size`.
|
|
final Size? customSize;
|
|
|
|
/// A [Function] to be called whenever the scaleState changes, this happens when the user double taps the content ou start to pinch-in.
|
|
final ValueChanged<PhotoViewScaleState>? scaleStateChangedCallback;
|
|
|
|
/// A flag that enables the rotation gesture support
|
|
final bool enableRotation;
|
|
|
|
/// The specified custom child to be shown instead of a image
|
|
final Widget? child;
|
|
|
|
/// The size of the custom [child]. [PhotoView] uses this value to compute the relation between the child and the container's size to calculate the scale value.
|
|
final Size? childSize;
|
|
|
|
/// Defines the maximum size in which the image will be allowed to assume, it
|
|
/// is proportional to the original image size. Can be either a double (absolute value) or a
|
|
/// [PhotoViewComputedScale], that can be multiplied by a double
|
|
final dynamic maxScale;
|
|
|
|
/// Defines the minimum size in which the image will be allowed to assume, it
|
|
/// is proportional to the original image size. Can be either a double (absolute value) or a
|
|
/// [PhotoViewComputedScale], that can be multiplied by a double
|
|
final dynamic minScale;
|
|
|
|
/// Defines the initial size in which the image will be assume in the mounting of the component, it
|
|
/// is proportional to the original image size. Can be either a double (absolute value) or a
|
|
/// [PhotoViewComputedScale], that can be multiplied by a double
|
|
final dynamic initialScale;
|
|
|
|
/// A way to control PhotoView transformation factors externally and listen to its updates
|
|
final PhotoViewControllerBase? controller;
|
|
|
|
/// A way to control PhotoViewScaleState value externally and listen to its updates
|
|
final PhotoViewScaleStateController? scaleStateController;
|
|
|
|
/// The alignment of the scale origin in relation to the widget size. Default is [Alignment.center]
|
|
final Alignment? basePosition;
|
|
|
|
/// Defines de next [PhotoViewScaleState] given the actual one. Default is [defaultScaleStateCycle]
|
|
final ScaleStateCycle? scaleStateCycle;
|
|
|
|
/// A pointer that will trigger a tap has stopped contacting the screen at a
|
|
/// particular location.
|
|
final PhotoViewImageTapUpCallback? onTapUp;
|
|
|
|
/// A pointer that might cause a tap has contacted the screen at a particular
|
|
/// location.
|
|
final PhotoViewImageTapDownCallback? onTapDown;
|
|
|
|
/// A pointer that might cause a tap has contacted the screen at a particular
|
|
/// location.
|
|
final PhotoViewImageDragStartCallback? onDragStart;
|
|
|
|
/// A pointer that might cause a tap has contacted the screen at a particular
|
|
/// location.
|
|
final PhotoViewImageDragEndCallback? onDragEnd;
|
|
|
|
/// A pointer that might cause a tap has contacted the screen at a particular
|
|
/// location.
|
|
final PhotoViewImageDragUpdateCallback? onDragUpdate;
|
|
|
|
/// A pointer that will trigger a scale has stopped contacting the screen at a
|
|
/// particular location.
|
|
final PhotoViewImageScaleEndCallback? onScaleEnd;
|
|
|
|
/// [HitTestBehavior] to be passed to the internal gesture detector.
|
|
final HitTestBehavior? gestureDetectorBehavior;
|
|
|
|
/// Enables tight mode, making background container assume the size of the image/child.
|
|
/// Useful when inside a [Dialog]
|
|
final bool? tightMode;
|
|
|
|
/// Quality levels for image filters.
|
|
final FilterQuality? filterQuality;
|
|
|
|
// Removes gesture detector if `true`.
|
|
// Useful when custom gesture detector is used in child widget.
|
|
final bool? disableGestures;
|
|
|
|
/// Enable pan the widget even if it's smaller than the hole parent widget.
|
|
/// Useful when you want to drag a widget without restrictions.
|
|
final bool? enablePanAlways;
|
|
|
|
final int index;
|
|
|
|
bool get _isCustomChild {
|
|
return child != null;
|
|
}
|
|
|
|
@override
|
|
State<StatefulWidget> createState() {
|
|
return _PhotoViewState();
|
|
}
|
|
}
|
|
|
|
class _PhotoViewState extends State<PhotoView>
|
|
with AutomaticKeepAliveClientMixin {
|
|
// image retrieval
|
|
|
|
// controller
|
|
late bool _controlledController;
|
|
late PhotoViewControllerBase _controller;
|
|
late bool _controlledScaleStateController;
|
|
late PhotoViewScaleStateController _scaleStateController;
|
|
|
|
@override
|
|
void initState() {
|
|
super.initState();
|
|
|
|
if (widget.controller == null) {
|
|
_controlledController = true;
|
|
_controller = PhotoViewController();
|
|
} else {
|
|
_controlledController = false;
|
|
_controller = widget.controller!;
|
|
}
|
|
|
|
if (widget.scaleStateController == null) {
|
|
_controlledScaleStateController = true;
|
|
_scaleStateController = PhotoViewScaleStateController();
|
|
} else {
|
|
_controlledScaleStateController = false;
|
|
_scaleStateController = widget.scaleStateController!;
|
|
}
|
|
|
|
_scaleStateController.outputScaleStateStream.listen(scaleStateListener);
|
|
}
|
|
|
|
@override
|
|
void didUpdateWidget(PhotoView oldWidget) {
|
|
if (widget.controller == null) {
|
|
if (!_controlledController) {
|
|
_controlledController = true;
|
|
_controller = PhotoViewController();
|
|
}
|
|
} else {
|
|
_controlledController = false;
|
|
_controller = widget.controller!;
|
|
}
|
|
|
|
if (widget.scaleStateController == null) {
|
|
if (!_controlledScaleStateController) {
|
|
_controlledScaleStateController = true;
|
|
_scaleStateController = PhotoViewScaleStateController();
|
|
}
|
|
} else {
|
|
_controlledScaleStateController = false;
|
|
_scaleStateController = widget.scaleStateController!;
|
|
}
|
|
super.didUpdateWidget(oldWidget);
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
if (_controlledController) {
|
|
_controller.dispose();
|
|
}
|
|
if (_controlledScaleStateController) {
|
|
_scaleStateController.dispose();
|
|
}
|
|
super.dispose();
|
|
}
|
|
|
|
void scaleStateListener(PhotoViewScaleState scaleState) {
|
|
if (widget.scaleStateChangedCallback != null) {
|
|
widget.scaleStateChangedCallback!(_scaleStateController.scaleState);
|
|
}
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
super.build(context);
|
|
return LayoutBuilder(
|
|
builder: (
|
|
BuildContext context,
|
|
BoxConstraints constraints,
|
|
) {
|
|
final computedOuterSize = widget.customSize ?? constraints.biggest;
|
|
final backgroundDecoration = widget.backgroundDecoration ??
|
|
const BoxDecoration(color: Colors.black);
|
|
|
|
return widget._isCustomChild
|
|
? CustomChildWrapper(
|
|
childSize: widget.childSize,
|
|
backgroundDecoration: backgroundDecoration,
|
|
heroAttributes: widget.heroAttributes,
|
|
scaleStateChangedCallback: widget.scaleStateChangedCallback,
|
|
enableRotation: widget.enableRotation,
|
|
controller: _controller,
|
|
scaleStateController: _scaleStateController,
|
|
maxScale: widget.maxScale,
|
|
minScale: widget.minScale,
|
|
initialScale: widget.initialScale,
|
|
basePosition: widget.basePosition,
|
|
scaleStateCycle: widget.scaleStateCycle,
|
|
onTapUp: widget.onTapUp,
|
|
onTapDown: widget.onTapDown,
|
|
onDragStart: widget.onDragStart,
|
|
onDragEnd: widget.onDragEnd,
|
|
onDragUpdate: widget.onDragUpdate,
|
|
onScaleEnd: widget.onScaleEnd,
|
|
outerSize: computedOuterSize,
|
|
gestureDetectorBehavior: widget.gestureDetectorBehavior,
|
|
tightMode: widget.tightMode,
|
|
filterQuality: widget.filterQuality,
|
|
disableGestures: widget.disableGestures,
|
|
enablePanAlways: widget.enablePanAlways,
|
|
child: widget.child,
|
|
)
|
|
: ImageWrapper(
|
|
imageProvider: widget.imageProvider!,
|
|
loadingBuilder: widget.loadingBuilder,
|
|
backgroundDecoration: backgroundDecoration,
|
|
gaplessPlayback: widget.gaplessPlayback,
|
|
heroAttributes: widget.heroAttributes,
|
|
scaleStateChangedCallback: widget.scaleStateChangedCallback,
|
|
enableRotation: widget.enableRotation,
|
|
controller: _controller,
|
|
scaleStateController: _scaleStateController,
|
|
maxScale: widget.maxScale,
|
|
minScale: widget.minScale,
|
|
initialScale: widget.initialScale,
|
|
basePosition: widget.basePosition,
|
|
scaleStateCycle: widget.scaleStateCycle,
|
|
onTapUp: widget.onTapUp,
|
|
onTapDown: widget.onTapDown,
|
|
onDragStart: widget.onDragStart,
|
|
onDragEnd: widget.onDragEnd,
|
|
onDragUpdate: widget.onDragUpdate,
|
|
onScaleEnd: widget.onScaleEnd,
|
|
outerSize: computedOuterSize,
|
|
gestureDetectorBehavior: widget.gestureDetectorBehavior,
|
|
tightMode: widget.tightMode,
|
|
filterQuality: widget.filterQuality,
|
|
disableGestures: widget.disableGestures,
|
|
errorBuilder: widget.errorBuilder,
|
|
enablePanAlways: widget.enablePanAlways,
|
|
index: widget.index,
|
|
);
|
|
},
|
|
);
|
|
}
|
|
|
|
@override
|
|
bool get wantKeepAlive => widget.wantKeepAlive;
|
|
}
|
|
|
|
/// The default [ScaleStateCycle]
|
|
PhotoViewScaleState defaultScaleStateCycle(PhotoViewScaleState actual) {
|
|
switch (actual) {
|
|
case PhotoViewScaleState.initial:
|
|
return PhotoViewScaleState.covering;
|
|
case PhotoViewScaleState.covering:
|
|
return PhotoViewScaleState.originalSize;
|
|
case PhotoViewScaleState.originalSize:
|
|
return PhotoViewScaleState.initial;
|
|
case PhotoViewScaleState.zoomedIn:
|
|
case PhotoViewScaleState.zoomedOut:
|
|
return PhotoViewScaleState.initial;
|
|
default:
|
|
return PhotoViewScaleState.initial;
|
|
}
|
|
}
|
|
|
|
/// A type definition for a [Function] that receives the actual [PhotoViewScaleState] and returns the next one
|
|
/// It is used internally to walk in the "doubletap gesture cycle".
|
|
/// It is passed to [PhotoView.scaleStateCycle]
|
|
typedef ScaleStateCycle = PhotoViewScaleState Function(
|
|
PhotoViewScaleState actual,
|
|
);
|
|
|
|
/// A type definition for a callback when the user taps up the photoview region
|
|
typedef PhotoViewImageTapUpCallback = Function(
|
|
BuildContext context,
|
|
TapUpDetails details,
|
|
PhotoViewControllerValue controllerValue,
|
|
);
|
|
|
|
/// A type definition for a callback when the user taps down the photoview region
|
|
typedef PhotoViewImageTapDownCallback = Function(
|
|
BuildContext context,
|
|
TapDownDetails details,
|
|
PhotoViewControllerValue controllerValue,
|
|
);
|
|
|
|
/// A type definition for a callback when the user drags up
|
|
typedef PhotoViewImageDragStartCallback = Function(
|
|
BuildContext context,
|
|
DragStartDetails details,
|
|
PhotoViewControllerValue controllerValue,
|
|
);
|
|
|
|
/// A type definition for a callback when the user drags
|
|
typedef PhotoViewImageDragUpdateCallback = Function(
|
|
BuildContext context,
|
|
DragUpdateDetails details,
|
|
PhotoViewControllerValue controllerValue,
|
|
);
|
|
|
|
/// A type definition for a callback when the user taps down the photoview region
|
|
typedef PhotoViewImageDragEndCallback = Function(
|
|
BuildContext context,
|
|
DragEndDetails details,
|
|
PhotoViewControllerValue controllerValue,
|
|
);
|
|
|
|
/// A type definition for a callback when a user finished scale
|
|
typedef PhotoViewImageScaleEndCallback = Function(
|
|
BuildContext context,
|
|
ScaleEndDetails details,
|
|
PhotoViewControllerValue controllerValue,
|
|
);
|
|
|
|
/// A type definition for a callback to show a widget while the image is loading, a [ImageChunkEvent] is passed to inform progress
|
|
typedef LoadingBuilder = Widget Function(
|
|
BuildContext context,
|
|
ImageChunkEvent? event,
|
|
int index,
|
|
);
|