RotatedWidget class
A widget that rotates its child by a specified angle while filling the available space.
The RotatedWidget automatically calculates the optimal child size based on the rotation angle, then applies rotation and scaling transformations to ensure the rotated child completely fills the viewport without gaps or overflow.
At 0° or 180°, the child matches the viewport dimensions. At 90° or 270°, the child's width and height are swapped. At intermediate angles (e.g., 45°), the child is sized smaller and then scaled up after rotation to fill the viewport.
The rotation is performed around the center of the child widget.
Example:
// Wrap a widget in a fixed-size container and rotate it
SizedBox(
width: 400,
height: 200,
child: RotatedWidget(
angle: pi / 4, // 45 degrees
filterQuality: FilterQuality.medium,
child: Container(
color: Colors.blue,
child: Center(child: Text('Rotated')),
),
),
)
See also:
- Transform.rotate, which provides basic rotation without automatic sizing.
- RotatedBox, which rotates in 90-degree increments.
- Inheritance
Constructors
- RotatedWidget.new({Key? key, required double angle, FilterQuality? filterQuality, required Widget? child})
-
Creates a widget that rotates its child.
const
Properties
- angle → double
-
The angle of rotation in radians.
final
- child → Widget?
-
The widget below this widget in the tree.
finalinherited
- filterQuality → FilterQuality?
-
The quality of the image filtering applied during rotation.
final
- 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(
) → SingleChildRenderObjectElement -
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
-
createRenderObject(
BuildContext context) → RenderObject -
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 -
This method is called when a RenderObject that was previously
associated with this widget is removed from the render tree.
The provided RenderObject will be of the same type as the one created by
this widget's createRenderObject method.
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, 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 widget.
inherited
-
updateRenderObject(
BuildContext context, covariant RenderRotatedWidget 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