RenderMetricsObject<T> class
RenderObjectWidget for getting widget metrics id - widget id manager - an instance of the RenderManager for getting and processing metrics onMount - mount / create instance callback RenderMetricsObject onUnMount - unmounted / uninstall instance callback RenderMetricsObject
When mounting a RenderMetricsObject, the createRenderObject method fires. It calls onMount if the manager addRenderObject method is also passed if it is passed. When deleted from the tree, didUnmountRenderObject is triggered. It calls onUnMount if passed and the removeRenderObject method
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- RenderObjectWidget
- SingleChildRenderObjectWidget
- RenderMetricsObject
Constructors
-
RenderMetricsObject({required T id, required RenderManager manager, MountCallback<
T> ? onMount, MountCallback<T> ? onUpdate, UnMountCallback<T> ? onUnMount, Key? key, Widget? child}) -
const
Properties
- child → Widget?
-
The widget below this widget in the tree.
finalinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- id → T
-
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- manager → RenderManager
-
final
-
onMount
→ MountCallback<
T> ? -
final
-
onUnMount
→ UnMountCallback<
T> ? -
final
-
onUpdate
→ MountCallback<
T> ? -
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → SingleChildRenderObjectElement -
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
-
createRenderObject(
BuildContext context) → RenderMetricsBox -
Creates an instance of the RenderObject class that this
RenderObjectWidget represents, using the configuration described by this
RenderObjectWidget.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
didUnmountRenderObject(
covariant RenderObject renderObject) → void -
A render object previously associated with this widget has been removed
from the tree. The given RenderObject will be of the same type as
returned by this object's createRenderObject.
override
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
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}) → 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 widget.
inherited
-
updateRenderObject(
BuildContext context, covariant RenderObject renderObject) → void -
Copies the configuration described by this RenderObjectWidget to the
given RenderObject, which will be of the same type as returned by this
object's createRenderObject.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited