BindElement<T> class

The BindElement is responsible for injecting dependencies into the widget tree so that they can be observed

Inheritance
Available extensions

Constructors

BindElement(Binder<T> widget)

Properties

arguments → dynamic

Available on BuildContext, provided by the PageArgExt extension

no setter
buildScope → BuildScope
A BuildScope whose dirty Elements can only be rebuilt by BuildOwner.buildScope calls whose context argument is an Element within this BuildScope.
no setterinherited
controller → T
no setter
debugDoingBuild → bool
Whether the widget is currently updating the widget or render tree.
no setterinherited
debugIsActive → bool
Returns true if the Element is active.
no setterinherited
debugIsDefunct → bool
Returns true if the Element is defunct.
no setterinherited
delegate → GetDelegate

Available on BuildContext, provided by the PageArgExt extension

no setter
depth → int
An integer that is guaranteed to be greater than the parent's, if any. The element at the root of the tree must have a depth greater than 0.
no setterinherited
devicePixelRatio → double

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.devicePixelRatioOf(context)
no setter
dirty → bool
Returns true if the element has been marked as needing rebuilding.
no setterinherited
disposers → List<Disposer>
final
hashCode → int
The hash code for this object.
no setterinherited
height → double

Available on BuildContext, provided by the ContextExt extension

The same of MediaQuery.of(context).size.height Note: updates when you resize your screen (like on a browser or desktop window)
no setter
iconColor → Color?

Available on BuildContext, provided by the ContextExt extension

give access to Theme.of(context).iconTheme.color
no setter
isDarkMode → bool

Available on BuildContext, provided by the ContextExt extension

Check if dark mode theme is enable
no setter
isDesktop → bool

Available on BuildContext, provided by the ContextExt extension

same as isDesktopOrLess
no setter
isDesktopOrLess → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is smaller than 1200p
no setter
isDesktopOrWider → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is higher than 1200p
no setter
isLandscape → bool

Available on BuildContext, provided by the ContextExt extension

check if device is on landscape mode
no setter
isLargeTablet → bool

Available on BuildContext, provided by the ContextExt extension

True if the shortestSide is largest than 720p
no setter
isLargeTabletOrLess → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is smaller than 720p
no setter
isLargeTabletOrWider → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is higher than 720p
no setter
isPhone → bool

Available on BuildContext, provided by the ContextExt extension

True if the shortestSide is smaller than 600p
no setter
isPhoneOrLess → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is smaller than 600p
no setter
isPhoneOrWider → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is higher than 600p
no setter
isPortrait → bool

Available on BuildContext, provided by the ContextExt extension

check if device is on portrait mode
no setter
isSmallTablet → bool

Available on BuildContext, provided by the ContextExt extension

True if the shortestSide is largest than 600p
no setter
isSmallTabletOrLess → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is smaller than 600p
no setter
isSmallTabletOrWider → bool

Available on BuildContext, provided by the ContextExt extension

True if the width is higher than 600p
no setter
isTablet → bool

Available on BuildContext, provided by the ContextExt extension

True if the current device is Tablet
no setter
location → String

Available on BuildContext, provided by the PageArgExt extension

no setter
mediaQuery → MediaQueryData

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.of(context).padding
no setter
mediaQueryPadding → EdgeInsets

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.paddingOf(context)
no setter
mediaQueryShortestSide → double

Available on BuildContext, provided by the ContextExt extension

get the shortestSide from screen
no setter
mediaQuerySize → Size

Available on BuildContext, provided by the ContextExt extension

The same of MediaQuery.sizeOf(context)
no setter
mediaQueryViewInsets → EdgeInsets

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.viewInsetsOf(context)
no setter
mediaQueryViewPadding → EdgeInsets

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.viewPaddingOf(context)
no setter
mounted → bool
Whether the Widget this context is associated with is currently mounted in the widget tree.
no setterinherited
orientation → Orientation

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.orientationOf(context)
no setter
owner → BuildOwner?
The object that manages the lifecycle of this element.
no setterinherited
pageSettings → PageSettings?

Available on BuildContext, provided by the PageArgExt extension

no setter
params → Map<String, String>

Available on BuildContext, provided by the PageArgExt extension

no setter
parentNavigatorKey → GlobalKey<NavigatorState>?

Available on BuildContext, provided by the NavKeyExt extension

no setter
renderObject → RenderObject?
The render object at (or below) this location in the tree.
no setterinherited
renderObjectAttachingChild → Element?
Returns the child of this Element that will insert a RenderObject into an ancestor of this Element to construct the render tree.
no setterinherited
router → Router

Available on BuildContext, provided by the PageArgExt extension

no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
settings → RouteSettings?

Available on BuildContext, provided by the PageArgExt extension

no setter
showNavbar → bool

Available on BuildContext, provided by the ContextExt extension

True if width be larger than 800
no setter
size → Size?
The size of the RenderBox returned by findRenderObject.
no setterinherited
slot → Object?
Information set by parent to define where this child fits in its parent's child list.
no setterinherited
textScaleFactor → TextScaler

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.textScaleFactorOf(context)
no setter
textTheme → TextTheme

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.of(context).padding
no setter
theme → ThemeData

Available on BuildContext, provided by the ContextExt extension

similar to MediaQuery.of(context).padding
no setter
widget → Binder<T>
The configuration for this element.
no setteroverride
width → double

Available on BuildContext, provided by the ContextExt extension

The same of MediaQuery.of(context).size.width Note: updates when you resize your screen (like on a browser or desktop window)
no setter

Methods

activate() → void
Transition from the "inactive" to the "active" lifecycle state.
inherited
attachNotificationTree() → void
Called in Element.mount and Element.activate to register this element in the notification tree.
inherited
attachRenderObject(Object? newSlot) → void
Add renderObject to the render tree at the location specified by newSlot.
inherited
build() → Widget
Subclasses should override this function to actually call the appropriate build function (e.g., StatelessWidget.build or State.build) for their widget.
override
deactivate() → void
Transition from the "active" to the "inactive" lifecycle state.
inherited
deactivateChild(Element child) → void
Move the given element to the list of inactive elements and detach its render object from the render tree.
inherited
debugDeactivated() → void
Called, in debug mode, after children have been deactivated (see deactivate).
inherited
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugExpectsRenderObjectForSlot(Object? slot) → bool
Whether the child in the provided slot (or one of its descendants) must insert a RenderObject into its ancestor RenderObjectElement by calling RenderObjectElement.insertRenderObjectChild on it.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
debugGetCreatorChain(int limit) → String
Returns a description of what caused this element to be created.
inherited
debugGetDiagnosticChain() → List<Element>
Returns the parent chain from this element back to the root of the tree.
inherited
debugVisitOnstageChildren(ElementVisitor visitor) → void
Calls the argument for each child considered onstage.
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
detachRenderObject() → void
Remove renderObject from the render tree.
inherited
didChangeDependencies() → void
Called when a dependency of this element changes.
override
dispatchNotification(Notification notification) → void
Start bubbling this notification at the given build context.
inherited
dispose() → void
doesDependOnInheritedElement(InheritedElement ancestor) → bool
Returns true if dependOnInheritedElement was previously called with ancestor.
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
forgetChild(Element child) → void
Remove the given child from the element's child list, in preparation for the child being reused elsewhere in the element tree.
inherited
get<T>() → T

Available on BuildContext, provided by the ReadExt extension

getDependencies(Element dependent) → Object?
Returns the dependencies value recorded for dependent with setDependencies.
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
getUpdate() → void
heightTransformer({double dividedBy = 1, double reducedBy = 0.0}) → double

Available on BuildContext, provided by the ContextExt extension

Gives you the power to get a portion of the height. Useful for responsive applications.
inflateWidget(Widget newWidget, Object? newSlot) → Element
Create an element for the given widget and add it as a child of this element in the given slot.
inherited
initState() → void
listen<T>() → T

Available on BuildContext, provided by the WatchExt extension

markNeedsBuild() → void
Marks the element as dirty and adds it to the global list of widgets to rebuild in the next frame.
inherited
mount(Element? parent, Object? newSlot) → void
Add this element to the tree in the given slot of the given parent.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyClients(covariant Binder<T> oldWidget) → void
Notifies all dependent elements that this inherited widget has changed, by calling Element.didChangeDependencies.
override
notifyDependent(covariant InheritedWidget oldWidget, Element dependent) → void
Called by notifyClients for each dependent.
inherited
performRebuild() → void
Calls the StatelessWidget.build method of the StatelessWidget object (for stateless widgets) or the State.build method of the State object (for stateful widgets) and then updates the widget tree.
inherited
ratio({double dividedBy = 1, double reducedByW = 0.0, double reducedByH = 0.0}) → double

Available on BuildContext, provided by the ContextExt extension

Divide the height proportionally by the given value
reassemble() → void
Called whenever the application is reassembled during debugging, for example during hot reload.
inherited
rebuild({bool force = false}) → void
Cause the widget to update itself. In debug builds, also verify various invariants.
inherited
removeDependent(Element dependent) → void
Called by Element.deactivate to remove the provided dependent Element from this InheritedElement.
inherited
responsiveValue<T>({T? watch, T? mobile, T? tablet, T? desktop}) → T

Available on BuildContext, provided by the ContextExt extension

Returns a specific value according to the screen size if the device width is higher than or equal to 1200 return desktop value. if the device width is higher than or equal to 600 and less than 1200 return tablet value. if the device width is less than 300 return watch value. in other cases return mobile value.
setDependencies(Element dependent, Object? value) → void
Sets the value returned by getDependencies value for dependent.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this element.
inherited
unmount() → void
Transition from the "inactive" to the "defunct" lifecycle state.
override
update(covariant Binder<T> newWidget) → void
Change the widget used to configure this element.
override
updateChild(Element? child, Widget? newWidget, Object? newSlot) → Element?
Update the given child with the given new configuration.
inherited
updateChildren(List<Element> oldChildren, List<Widget> newWidgets, {Set<Element>? forgottenChildren, List<Object?>? slots}) → List<Element>
Updates the children of this element to use new widgets.
inherited
updated(covariant InheritedWidget oldWidget) → void
Calls Element.didChangeDependencies of all dependent elements, if InheritedWidget.updateShouldNotify returns true.
inherited
updateDependencies(Element dependent, Object? aspect) → void
Called by dependOnInheritedWidgetOfExactType when a new dependent is added.
inherited
updateSlot(Object? newSlot) → void
Called by updateSlotForChild when the framework needs to change the slot that this Element occupies in its ancestor.
inherited
updateSlotForChild(Element child, Object? newSlot) → void
Change the slot that the given child occupies in its parent.
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
Wrapper around visitChildren for BuildContext.
inherited
visitChildren(ElementVisitor visitor) → void
Calls the argument for each child. Must be overridden by subclasses that support having children.
inherited
widthTransformer({double dividedBy = 1, double reducedBy = 0.0}) → double

Available on BuildContext, provided by the ContextExt extension

Gives you the power to get a portion of the width. Useful for responsive applications.

Operators

operator ==(Object other) → bool
Compare two widgets for equality.
inherited