AssetPickerViewerBuilderDelegate<Asset, Path> class abstract

Constructors

AssetPickerViewerBuilderDelegate({required List<Asset> previewAssets, required ThemeData themeData, required int currentIndex, AssetPickerProvider<Asset, Path>? selectorProvider, AssetPickerViewerProvider<Asset>? provider, List<Asset>? selectedAssets, int? maxAssets, bool shouldReversePreview = false, AssetSelectPredicate<Asset>? selectPredicate})

Properties

bottomBarHeight → double

Height for bottom bar widget. 底栏部件的高度

no setter

bottomDetailHeight → double

no setter

bottomPreviewHeight → double

Height for bottom preview widget. 底栏预览部件的高度

no setter

currentAsset → Asset

Getter for the current asset. 当前资源的Getter

no setter

currentIndex ↔ int

Current previewing index in assets. 当前查看的索引

getter/setter pair

doubleTapAnimation ↔ Animation<double>?

Animation for double tap. 双击缩放的动画

getter/setter pair

doubleTapAnimationController ↔ AnimationController

AnimationController for double tap animation. 双击缩放的动画控制器

getter/setter pair

doubleTapCurveAnimation ↔ Animation<double>

CurvedAnimation for double tap. 双击缩放的动画曲线

getter/setter pair

doubleTapListener ↔ VoidCallback

Callback for double tap. 双击缩放的回调

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

isAppleOS → bool

Whether the current platform is Apple OS. 当前平台是否为苹果系列系统

no setter

isDisplayingDetail → ValueNotifier<bool>

Whether detail widgets displayed. 详情部件是否显示

final

isSelectedPreviewing → bool

Whether the viewer is under preview mode for selected assets. 当前是否处于查看已选中资源的模式

late, final

maxAssets → int?

Maximum count for asset selection. 资源选择的最大数量

final

pageController → ExtendedPageController

PageController for assets preview PageView. 查看图片资源的页面控制器

no setter

pageStreamController → StreamController<int>

StreamController for viewing page index update. 用于更新当前正在浏览的资源页码的流控制器

final

previewAssets → List<Asset>

Assets provided to preview. 提供预览的资源

final

previewingListController → ScrollController

The ScrollController for the previewing assets list. 正在预览的资源的 ScrollController

final

provider → AssetPickerViewerProvider<Asset>?

ChangeNotifier for photo selector viewer. 资源预览器的状态保持

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

selectedAssets → List<Asset>?

Selected assets. 已选的资源

final

selectedCount → int

The length getter for selected assets currently. 当前选中的资源的长度获取

no setter

selectedMaximumAssets → bool

是否已经选择了最大数量的资源

no setter

selectedNotifier → ValueNotifier<int>

Construct a notifier to notify whether if a new asset is selected or unselected. 构造一个通知器，在新资源选中或取消选中时通知。

late, final

selectorProvider → AssetPickerProvider<Asset, Path>?

Provider for AssetPicker. 资源选择器的状态保持

final

selectPredicate → AssetSelectPredicate<Asset>?

Predicate whether an asset can be selected or unselected. 判断资源可否被选择。

final

semanticsTextDelegate → AssetPickerTextDelegate

no setter

shouldReversePreview → bool

Whether the preview sequence is reversed. 预览时顺序是否为反向

final

textDelegate → AssetPickerTextDelegate

no setter

themeData → ThemeData

Theme for the viewer. 主题

final

viewerState ↔ AssetPickerViewerState<Asset, Path>

The State for a viewer. 预览器的状态实例

getter/setter pair

Methods

assetPageBuilder(BuildContext context, int index) → Widget

Split page builder according to type of asset. 根据资源类型使用不同的构建页

bottomDetailBuilder(BuildContext context) → Widget

Detail widget aligned to bottom. 底部信息部件

bottomDetailItemBuilder(BuildContext context, int index) → Widget

Thumb item widgets in bottom detail. 底部信息栏单个资源缩略部件

build(BuildContext context) → Widget

Yes, the build method. 没错，是它是它就是它，我们亲爱的 build 方法~

confirmButton(BuildContext context) → Widget

Confirm button. 确认按钮

didUpdateViewer(covariant AssetPickerViewerState<Asset, Path> state, covariant AssetPickerViewer<Asset, Path> oldWidget, covariant AssetPickerViewer<Asset, Path> newWidget) → void

Call when the viewer is calling State.didUpdateWidget. 当预览器调用 State.didUpdateWidget 时操作 State。

dispose() → void

Keep a dispose method to sync with State. 保留一个 dispose 方法与 State 同步。

failedItemBuilder(BuildContext context) → Widget

The item widget when AssetEntity.thumbnailData load failed. 资源缩略数据加载失败时使用的部件

initAnimations(covariant AssetPickerViewerState<Asset, Path> state) → void

Initialize animations related to the zooming preview. 为缩放预览初始化动画

initStateAndTicker(covariant AssetPickerViewerState<Asset, Path> state, TickerProvider v) → void

Call when viewer is calling State.initState. 当预览器调用 State.initState 时注册 State。

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onChangingSelected(BuildContext context, Asset asset, bool isSelected) → Future<bool>

ordinalSortKey(double value) → OrdinalSortKey

Produce OrdinalSortKey with the fixed name.

previewWidgetLoadStateChanged(BuildContext context, ExtendedImageState state, {bool hasLoaded = false}) → Widget

Common image load state changed callback with Widget. 图片加载状态的部件回调

selectAsset(Asset entity) → void

selectButton(BuildContext context) → Widget

Select button. 选择按钮

switchDisplayingDetail({bool? value}) → void

Method to switch isDisplayingDetail. 切换显示详情状态的方法

syncSelectedAssetsWhenPop() → Future<bool>

Sync selected assets currently with asset picker provider. 在预览中当前已选的图片同步到选择器的状态

toString() → String

A string representation of this object.

inherited

unSelectAsset(Asset entity) → void

updateAnimation(ExtendedImageGestureState state) → void

Execute scale animation when double tap. 双击时执行缩放动画

Operators

operator ==(Object other) → bool

The equality operator.

inherited