AssetPickerBuilderDelegate<A, P> class abstract

The delegate to build the whole picker's components.

By extending the delegate, you can customize every components on you own. Delegate requires two generic types:

Implementers

Constructors

AssetPickerBuilderDelegate({required AssetPickerProvider<A, P> provider, int gridCount = 4, Color? themeColor, AssetsPickerTextDelegate? textDelegate, ThemeData? pickerTheme, SpecialItemPosition specialItemPosition = SpecialItemPosition.none, WidgetBuilder? specialItemBuilder, IndicatorBuilder? loadingIndicatorBuilder, bool allowSpecialItemWhenEmpty = false})

Properties

allowSpecialItemWhenEmpty → bool
Whether the special item will display or not when assets is empty. 当没有资源时是否显示自定义item
final
appBarItemHeight → double
Item's height in app bar. 顶栏内各个组件的统一高度
no setter
appleOSBlurRadius → double
Blur radius in Apple OS layout mode. 苹果系列系统布局方式下的模糊度
no setter
bottomActionBarHeight → double
Height for bottom action bar. 底部操作栏的高度
no setter
gridCount → int
Assets count for the picker. 资源网格数
final
gridScrollController → ScrollController
The ScrollController for the preview grid.
final
hashCode → int
The hash code for this object.
no setterinherited
isAppleOS → bool
Whether the current platform is Apple OS. 当前平台是否苹果系列系统 (iOS & MacOS)
no setter
isSingleAssetMode → bool
Whether the picker is under the single asset mode. 选择器是否为单选模式
no setter
itemSpacing → double
Space between assets item widget. 资源部件之间的间隔
no setter
loadingIndicatorBuilder → IndicatorBuilder?
Indicates the loading status for the builder. 指示目前加载的状态
final
overlayStyle → SystemUiOverlayStyle
Return a system ui overlay style according to the brightness of the theme data. 根据主题返回状态栏的明暗样式
no setter
pickerTheme → ThemeData?
Theme for the picker. 选择器的主题
final
provider → AssetPickerProvider<A, P>
ChangeNotifier for asset picker. 资源选择器状态保持
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
specialItemBuilder → WidgetBuilder?
The widget builder for the the special item. 自定义item的构造方法
final
specialItemPosition → SpecialItemPosition
Allow users set a special item in the picker with several positions. 允许用户在选择器中添加一个自定义item，并指定位置
final
theme → ThemeData
ThemeData for the picker. 选择器使用的主题
no setter
themeColor → Color
Main color for the picker. 选择器的主题色
final

Methods

androidLayout(BuildContext context) → Widget
Layout for Android devices. Android设备的选择器布局
appBar(BuildContext context) → PreferredSizeWidget
Custom app bar for the picker. 选择器自定义的顶栏
appleOSLayout(BuildContext context) → Widget
Layout for Apple OS devices. 苹果系列设备的选择器布局
assetGridItemBuilder(BuildContext context, int index, List<A> currentAssets) → Widget
The item builder for the assets' grid. 资源列表项的构建
assetsGridBuilder(BuildContext context) → Widget
The main grid view builder for assets. 主要的资源查看网格部件
assetsGridItemCount(BuildContext context, List<A> currentAssets) → int
The function which return items count for the assets' grid. 为资源列表提供内容数量计算的方法
audioIndicator(BuildContext context, A asset) → Widget
Audio asset type indicator. 音频类型资源指示
audioItemBuilder(BuildContext context, int index, A asset) → Widget
The item builder for audio type of asset. 音频资源的部件构建
backButton(BuildContext context) → Widget
Back button. 返回按钮
bottomActionBar(BuildContext context) → Widget
Action bar widget aligned to bottom. 底部操作栏部件
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
failedItemBuilder(BuildContext context) → Widget
Item widgets when the thumb data load failed. 资源缩略数据加载失败时使用的部件
findChildIndexBuilder(String id, List<A> currentAssets) → int?
Indicates how would the grid found a reusable RenderObject through id. 为 Grid 布局指示如何找到可复用的 RenderObject。
gifIndicator(BuildContext context, A asset) → Widget
GIF image type indicator. GIF类型图片指示
imageAndVideoItemBuilder(BuildContext context, int index, A asset) → Widget
The item builder for images and video type of asset. 图片和视频资源的部件构建
loadingIndicator(BuildContext context) → Widget
Loading indicator. 加载指示器
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
pathEntityListBackdrop(BuildContext context) → Widget
A backdrop widget behind the pathEntityListWidget. 在 pathEntityListWidget 后面的遮罩层
pathEntityListWidget(BuildContext context) → Widget
List widget for path entities. 路径选择列表组件
pathEntitySelector(BuildContext context) → Widget
Path entity select widget builder. 路径选择部件构建
pathEntityWidget({required BuildContext context, required Map<P, Uint8List?> list, required int index, bool isAudio = false}) → Widget
Item widgets for path entity selector. 路径单独条目选择组件
previewButton(BuildContext context) → Widget
Preview button to preview selected assets. 预览已选资源的按钮
selectedBackdrop(BuildContext context, int index, A asset) → Widget
Animated backdrop widget for items. 部件选中时的动画遮罩部件
selectIndicator(BuildContext context, A asset) → Widget
Indicator for assets selected status. 资源是否已选的指示器
toString() → String
A string representation of this object.
inherited
videoIndicator(BuildContext context, A asset) → Widget
Video asset type indicator. 视频类型资源指示

Operators

operator ==(Object other) → bool
The equality operator.
inherited