ValueLayoutBuilder<T> class
Builds a widget tree that can depend on the parent widget's size and a extra value.
Similar to the LayoutBuilder widget except that the constraints contains an extra value.
See also:
- LayoutBuilder.
SliverValueLayoutBuilder, the sliver version of this widget.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- RenderObjectWidget
- ConstrainedLayoutBuilder<
BoxValueConstraints< T> > - ValueLayoutBuilder
Constructors
-
ValueLayoutBuilder({Key? key, required ValueLayoutWidgetBuilder<
T> builder}) -
Creates a widget that defers its building until layout.
const
Properties
-
builder
→ Widget Function(BuildContext context, BoxValueConstraints<
T> constraints) -
Called at layout time to construct the widget tree.
finalinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → RenderObjectElement -
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
-
createRenderObject(
BuildContext context) → RenderValueLayoutBuilder< T> -
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.
inherited
-
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.
inherited
-
updateShouldRebuild(
covariant ConstrainedLayoutBuilder< BoxValueConstraints< oldWidget) → boolT> > -
Whether builder needs to be called again even if the layout constraints
are the same.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited