AssetPickerProvider<Asset, Path> class
abstract
Helps the assets picker to manage Paths and Assets.
The provider maintain all methods that control assets and paths. By extending it you can customize how you can get all assets or paths, how to fetch the next page of assets, and how to get the thumbnail data of a path.
- Inheritance
-
- Object
- ChangeNotifier
- AssetPickerProvider
Constructors
-
AssetPickerProvider({int maxAssets = defaultMaxAssetsCount, int pageSize = defaultAssetsPerPage, ThumbnailSize pathThumbnailSize = defaultPathThumbnailSize, List<
Asset> ? selectedAssets})
Properties
-
currentAssets
↔ List<
Asset> -
Assets under current path entity.
正在查看的资源路径下的所有资源
getter/setter pair
- currentAssetsListPage → int
-
The current page for assets list.
当前加载的资源列表分页数
no setter
-
currentPath
↔ PathWrapper<
Path> ? -
The path which is currently using.
正在查看的资源路径
getter/setter pair
- hasAssetsToDisplay ↔ bool
-
Whether there are any assets can be displayed.
是否有资源可供显示
getter/setter pair
- hashCode → int
-
The hash code for this object.
no setterinherited
- hasListeners → bool
-
Whether any listeners are currently registered.
no setterinherited
- hasMoreToLoad → bool
-
Whether more assets are waiting for a load.
是否还有更多资源可以加载
no setter
- isAssetsEmpty ↔ bool
-
Whether there are assets on the devices.
设备上是否有资源文件
getter/setter pair
- isSelectedNotEmpty → bool
-
选中资源是否为空
no setter
- maxAssets → int
-
Maximum count for asset selection.
资源选择的最大数量
final
- mounted → bool
-
Whether the provider is mounted. Set to
falseif disposed.no setter - pageSize → int
-
Assets should be loaded per page.
资源选择的最大数量
final
-
paths
↔ List<
PathWrapper< Path> > -
List for all path entity wrapped by PathWrapper.
所有资源路径的列表，以 PathWrapper 包装
getter/setter pair
- pathThumbnailSize → ThumbnailSize
-
Thumbnail size for path selector.
路径选择器中缩略图的大小
final
-
previousSelectedAssets
→ List<
Asset> -
Selected assets before the picker starts picking.
选择器开始选择前已选中的资源
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
-
selectedAssets
↔ List<
Asset> -
Selected assets.
已选中的资源
getter/setter pair
- selectedDescriptions → String
-
Descriptions for selected assets currently.
当前已被选中的资源的描述
no setter
- selectedMaximumAssets → bool
-
是否已经选择了最大数量的资源
no setter
- totalAssetsCount ↔ int?
-
Total count for assets.
资源总数
getter/setter pair
Methods
-
addListener(
VoidCallback listener) → void -
Register a closure to be called when the object changes.
inherited
-
dispose(
) → void -
Clear all fields when dispose.
销毁时重置所有内容
override
-
getAssetsFromPath(
int page, Path path) → Future< void> - Get assets under the specific path entity. 获取指定路径下的资源
-
getPaths(
) → Future< void> - Get paths. 获取所有的资源路径
-
getThumbnailFromPath(
PathWrapper< Path> path) → Future<Uint8List?> - Get the thumbnail from the first asset under the specific path entity. 获取指定路径下的第一个资源的缩略图数据
-
loadMoreAssets(
) → Future< void> - Load more assets. 加载更多资源
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
notifyListeners(
) → void -
Call all the registered listeners.
override
-
removeListener(
VoidCallback listener) → void -
Remove a previously registered closure from the list of closures that are
notified when the object changes.
inherited
-
selectAsset(
Asset item) → void - Select asset. 选中资源
-
setPathThumbnail(
Path path, Uint8List? data) → void -
Set thumbnail
datafor the specificpath. 为指定的路径设置缩略图数据 -
switchPath(
[PathWrapper< Path> ? path]) → Future<void> - Switch between paths. 切换路径
-
toString(
) → String -
A string representation of this object.
inherited
-
unSelectAsset(
Asset item) → void - Un-select asset. 取消选中资源
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited