An adapter for placing a specific RenderBox in the widget tree.
A given render object can be placed at most once in the widget tree. This widget enforces that restriction by keying itself using a GlobalObjectKey for the given render object.
- Inheritance
- Object
- Widget
- RenderObjectWidget
- LeafRenderObjectWidget
- WidgetToRenderBoxAdapter
Constructors
- WidgetToRenderBoxAdapter({@required RenderBox renderBox, VoidCallback onBuild })
-
Creates an adapter for placing a specific RenderBox in the widget tree.
Properties
- onBuild → VoidCallback
-
Called when it is safe to update the render box and its descendants. If you update the RenderObject subtree under this widget outside of invocations of this callback, features like hit-testing will fail as the tree will be dirty.
read-only - renderBox → RenderBox
-
The render box to place in the widget tree.
read-only - 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) → RenderBox -
Creates an instance of the
RenderObjectclass that thisRenderObjectWidgetrepresents, using the configuration described by thisRenderObjectWidget. -
updateRenderObject(
BuildContext context, RenderBox 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(
) → LeafRenderObjectElement -
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