ViewBuildContext<TViewModel extends ViewModel> class abstract

ViewBuildContext

Implemented types

• BuildContext
• BindableObject
• BindableObjectMixin
• BindableObjectValueMixin
• BindableObjectWidgetBuilderMixin

Implementers

• ViewElementBase

Constructors

ViewBuildContext()

Properties

debugDoingBuild → bool

Whether the widget is currently updating the widget or render tree.

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

model → TViewModel

ViewModel

no setter

mounted → bool

Whether the Widget this context is associated with is currently mounted in the widget tree.

no setter, inherited

owner → BuildOwner?

The BuildOwner for this context. The BuildOwner is in charge of managing the rendering pipeline for this context.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

size → Size?

The size of the RenderBox returned by findRenderObject.

no setter, inherited

widget → Widget

The current configuration of the Element that is this BuildContext.

no setter, inherited

Methods

$any<TValue>(Iterable<ValueListenable<TValue>> valueListenables, {required ValueWidgetBuilder<Iterable<TValue>> builder, Widget? child}) → Widget

绑定到指定 ValueListenable 集合, 当 valueListenables 中 任一 ValueListenable 值发生变化时, 使用 builder 构建 Widget

inherited

$anyFor<TValue>(Iterable<Object> prepertyKeys, {required ValueWidgetBuilder<Iterable<TValue>> builder, Widget? child}) → Widget

绑定到指定属性集合, 当任一 prepertyKeys 对应属性值发生变化时, 使用 builder 构建 Widget

inherited

$anyMap<TValue>(Map<Object, ValueListenable<TValue>> map, {required ValueWidgetBuilder<Map<Object, TValue>> builder, Widget? child}) → Widget

绑定到指定 Map 键集合, 当 map 中任一 ValueListenable 值发生变化时, 使用 builder 构建 Widget

inherited

$anyMapFor<TValue>(Map<Object, MapBehavior<TValue>?> prepertyKeyMap, {required ValueWidgetBuilder<Map<Object, TValue>> builder, Widget? child}) → Widget

绑定到指定属性集合, 当任一 prepertyKeyMap 中对应的绑定属性值发生变化时, 使用 builder 构建 Widget

inherited

$build<TValue>(ValueListenable<TValue> valueListenable, {required ValueWidgetBuilder<TValue> builder, Widget? child}) → Widget

构建 Widget

inherited

$buildOn<TValue>(ValueListenable<TValue> valueListenable, {required ValueWidgetBuilder<TValue> builder, required bool on(TValue value), Widget? child}) → Widget

构建 Widget

inherited

$cond<TValue>(ValueListenable<TValue> valueListenable, {ValueWidgetBuilder<TValue>? $true, ValueWidgetBuilder<TValue>? $false, Widget? child, bool valueHandle(TValue)?}) → Widget

绑定到指定 ValueListenable, 当 valueListenable 值发生变化时, 若值判定结果为 true 则使用 $true 构建 Widget, 否则使用 $false 构建 Widget

inherited

$condFor<TValue>(Object propertyKey, {ValueWidgetBuilder<TValue>? $true, ValueWidgetBuilder<TValue>? $false, Widget? child, bool valueHandle(TValue)?, TValue? initialValue}) → Widget

绑定到指定属性, 当 propertyKey 对应属性值发生变化时, 若值判定结果为 true 则使用 $true 构建 Widget, 否则使用 $false 构建 Widget

inherited

$if<TValue>(ValueListenable<TValue> valueListenable, {required ValueWidgetBuilder<TValue> builder, Widget? child, bool valueHandle(TValue)?}) → Widget

绑定到指定 ValueListenable, 当 valueListenable 值发生变化时, 若值判定结果为 true 则使用 builder 构建 Widget, 否则不构建 Widget

inherited

$ifFor<TValue>(Object propertyKey, {required ValueWidgetBuilder<TValue> builder, Widget? child, bool valueHandle(TValue)?, TValue? initialValue}) → Widget

绑定到指定属性, 当 propertyKey 对应属性值发生变化时, 若值判定结果为 true 则使用 builder 构建 Widget, 否则不构建 Widget

inherited

$multi<TValue>(Iterable<ValueListenable<TValue>> valueListeneables, {required Widget builder(BuildContext context, TValue value, Widget? child, int index, ValueListenable<TValue> valueListeneable), Widget? childBuilder(int index)?}) → List<Widget>

构建多个 Widget

inherited

$select<TValue>(ValueListenable<TValue> valueListenable, {required ValueWidgetBuilder<TValue>? selector(TValue), Widget? child}) → Widget

绑定到指定 ValueListenable 当值发生变化时, 使用 selector 选择器中提供的构建方法构建 Widget

inherited

$switch<TKey, TValue>(ValueListenable<TValue> valueListenable, {Map<TKey, ValueWidgetBuilder<TValue>>? options, ValueWidgetBuilder<TValue>? defalut, Widget? child, TKey valueToKey(TValue)?}) → Widget

绑定到指定 ValueListenable, 当 valueListenable 值发生变化时, 其值做为 key 到 options 中查找对应 Widget 构建方法, 若未找到则使用 default 构建, 如 default 为 null 则不构建 Widget

inherited

$switchFor<TKey, TValue>(Object propertyKey, {Map<TKey, ValueWidgetBuilder<TValue>>? options, ValueWidgetBuilder<TValue>? defalut, Widget? child, TKey valueToKey(TValue)?, TValue? initialValue}) → Widget

绑定到指定属性, 当 propertyKey 对应属性值发生变化时, 其值做为 key 到 options 中查找对应 Widget 构建方法, 若未找到则使用 default 构建, 如 default 为 null 则不构建 Widget

inherited

$watch<TValue>(ValueListenable<TValue> valueListenable, {required ValueWidgetBuilder<TValue> builder, Widget? child}) → Widget

绑定到指定 ValueListenable, 当 valueListenable 值发生变化时, 使用 builder 构建 Widget

inherited

$watchFor<TValue>(Object propertyKey, {required ValueWidgetBuilder<TValue> builder, Widget? child, TValue? initialValue}) → Widget

绑定到指定属性, 当 propertyKey 对应属性值发生变化时, 使用 builder 构建 Widget

inherited

dependOnInheritedElement(InheritedElement ancestor, {Object? aspect}) → InheritedWidget

Registers this build context with ancestor such that when ancestor's widget changes this build context is rebuilt.

inherited

dependOnInheritedWidgetOfExactType<T extends InheritedWidget>({Object? aspect}) → T?

Returns the nearest widget of the given type T and creates a dependency on it, or null if no appropriate widget is found.

inherited

describeElement(String name, {DiagnosticsTreeStyle style = DiagnosticsTreeStyle.errorProperty}) → DiagnosticsNode

Returns a description of the Element associated with the current build context.

inherited

describeMissingAncestor({required Type expectedAncestorType}) → List<DiagnosticsNode>

Adds a description of a specific type of widget missing from the current build context's ancestry tree.

inherited

describeOwnershipChain(String name) → DiagnosticsNode

Adds a description of the ownership chain from a specific Element to the error report.

inherited

describeWidget(String name, {DiagnosticsTreeStyle style = DiagnosticsTreeStyle.errorProperty}) → DiagnosticsNode

Returns a description of the Widget associated with the current build context.

inherited

dispatchNotification(Notification notification) → void

Start bubbling this notification at the given build context.

inherited

ensureProperty<TValue>(Object propertyKey, {TValue? initialValue}) → BindableProperty<TValue>

确认指定 propertyKey 对应的绑定属性

inherited

findAncestorRenderObjectOfType<T extends RenderObject>() → T?

Returns the RenderObject object of the nearest ancestor RenderObjectWidget widget that is an instance of the given type T.

inherited

findAncestorStateOfType<T extends State<StatefulWidget>>() → T?

Returns the State object of the nearest ancestor StatefulWidget widget that is an instance of the given type T.

inherited

findAncestorWidgetOfExactType<T extends Widget>() → T?

Returns the nearest ancestor widget of the given type T, which must be the type of a concrete Widget subclass.

inherited

findRenderObject() → RenderObject?

The current RenderObject for the widget. If the widget is a RenderObjectWidget, this is the render object that the widget created for itself. Otherwise, it is the render object of the first descendant RenderObjectWidget.

inherited

findRootAncestorStateOfType<T extends State<StatefulWidget>>() → T?

Returns the State object of the furthest ancestor StatefulWidget widget that is an instance of the given type T.

inherited

getElementForInheritedWidgetOfExactType<T extends InheritedWidget>() → InheritedElement?

Obtains the element corresponding to the nearest widget of the given type T, which must be the type of a concrete InheritedWidget subclass.

inherited

getInheritedWidgetOfExactType<T extends InheritedWidget>() → T?

Returns the nearest widget of the given InheritedWidget subclass T or null if an appropriate ancestor is not found.

inherited

getProperties<TValue>(Iterable<Object> propertyKeys, {bool required = false}) → Iterable<BindableProperty<TValue>?>

获取指定 propertyKeys 对应的属性集合

inherited

getProperty<TValue>(Object propertyKey, {bool required = false}) → BindableProperty<TValue>?

获取指定 propertyKey 对应的属性

inherited

getPropertyOf<TValue, TProperty extends BindableProperty<TValue>>(Object propertyKey, {bool required = false}) → TProperty?

获取指定 propertyKey 对应 TProperty 类型属性

inherited

getValue<TValue>(Object propertyKey, {bool requiredProperty = false, TValue? defaultValue}) → TValue?

获取指定 propertyKey 对应的属性值

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

notify(Object propertyKey, {bool requiredProperty = true}) → void

发送指定 propertyKey 对应的属性值变更通知

inherited

registerProperty<TValue>(Object propertyKey, BindableProperty<TValue> property) → BindableProperty<TValue>

注册一个绑定属性

inherited

requireProperties<TValue>(Iterable<Object> propertyKeys) → Iterable<BindableProperty<TValue>>

获取指定 propertyKeys 对应的属性集合

inherited

requireProperty<TValue>(Object propertyKey) → BindableProperty<TValue>

获取指定 propertyKey 对应的属性

inherited

requirePropertyOf<TValue, TProperty extends BindableProperty<TValue>>(Object propertyKey) → TProperty

获取指定 propertyKey 对应 TProperty 类型属性

inherited

requireValue<TValue>(Object propertyKey) → TValue

获取指定 propertyKey 对应的属性值

inherited

setState(VoidCallback fn) → void

setState

setValue<TValue>(Object propertyKey, TValue value, {bool requiredProperty = true}) → void

设置指定 propertyKey 对应的属性值,

inherited

setValues(Iterable<Object> propertyKeys, Iterable<Object?> values, {bool requiredProperty = true}) → void

设置指定 propertyKeys 对应的属性值

inherited

toString() → String

A string representation of this object.

inherited

updateValue<TValue>(Object propertyKey, TValue? updator(TValue), {bool requiredProperty = true}) → void

更新指定 propertyKey 对应的属性值

inherited

visitAncestorElements(ConditionalElementVisitor visitor) → void

Walks the ancestor chain, starting with the parent of this build context's widget, invoking the argument for each ancestor.

inherited

visitChildElements(ElementVisitor visitor) → void

Walks the children of this widget.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited