A widget that defers the layout of its single child to a delegate.
The delegate can determine the layout constraints for the child and can decide where to position the child. The delegate can also determine the size of the parent, but the size of the parent cannot depend on the size of the child.
See also:
- SingleChildLayoutDelegate, which controls the layout of the child.
- Align, which sizes itself based on its child's size and positions the child according to a FractionalOffset value.
- FractionallySizedBox, which sizes its child based on a fraction of its own size and positions the child according to a FractionalOffset value.
- CustomMultiChildLayout, which uses a delegate to position multiple children.
- Inheritance
- Object
- Widget
- RenderObjectWidget
- SingleChildRenderObjectWidget
- CustomSingleChildLayout
Constructors
- CustomSingleChildLayout({Key key, @required SingleChildLayoutDelegate delegate, Widget child })
-
Creates a custom single child layout.
Properties
- delegate → SingleChildLayoutDelegate
-
The delegate that controls the layout of the child.
read-only - child → Widget
-
The widget below this widget in the tree.
read-only, inherited - hashCode → int
-
Get a hash code for this object.
read-only, inherited - key → Key
-
Controls how one widget replaces another widget in the tree.
read-only, inherited - runtimeType → Type
-
A representation of the runtime type of the object.
read-only, inherited
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited
Methods
-
createRenderObject(
BuildContext context) → RenderCustomSingleChildLayoutBox -
Creates an instance of the
RenderObjectclass that thisRenderObjectWidgetrepresents, using the configuration described by thisRenderObjectWidget. -
updateRenderObject(
BuildContext context, RenderCustomSingleChildLayoutBox renderObject) → void -
Copies the configuration described by this
RenderObjectWidgetto the givenRenderObject, which will be of the same type as returned by this object'screateRenderObject. -
createElement(
) → SingleChildRenderObjectElement -
RenderObjectWidgets always inflate to a
RenderObjectElementsubclass.inherited -
debugFillDescription(
List<String> description) → void -
Add additional information to the given description for use by toString.
inherited -
didUnmountRenderObject(
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 non-existent method or property is accessed.
inherited -
toString(
) → String -
Returns a string representation of this object.
inherited -
toStringShort(
) → String -
A short, textual description of this widget.
inherited