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

• Object
• DiagnosticableTree
• Widget
• RenderObjectWidget
• SingleChildRenderObjectWidget
• RotatedWidget

Available extensions

• WidgetExtension

Constructors

RotatedWidget({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

asAbsoluteItem → Widget

Available on Widget, provided by the WidgetExtension extension

Explicitly wraps this widget as an AbsoluteItem.

no setter

asFlexItem → Widget

Available on Widget, provided by the WidgetExtension extension

Explicitly wraps this widget as a FlexItem.

no setter

child → Widget?

The widget below this widget in the tree.

final, inherited

filterQuality → FilterQuality?

The quality of the image filtering applied during rotation.

final

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

aspectRatio(double aspectRatio, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the aspect ratio constraint for this widget.

bottom(PositionUnit bottom, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the distance from the bottom edge of the parent container.

constrained({SizeUnit? minWidth, SizeUnit? maxWidth, SizeUnit? minHeight, SizeUnit? maxHeight, Key? key}) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets comprehensive size constraints including both minimum and maximum bounds.

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.

override

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

flexGrow(double flexGrow, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the flex grow factor for this widget within a flex container.

flexShrink(double flexShrink, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the flex shrink factor for this widget within a flex container.

height(SizeUnit height, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the height of this widget using a SizeUnit.

id(Object valueKey) → Widget

Available on Widget, provided by the WidgetExtension extension

Assigns a ValueKey to this widget using the provided value.

key(Key key) → Widget

Available on Widget, provided by the WidgetExtension extension

Assigns a Key to this widget.

left(PositionUnit left, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the distance from the left edge of the parent container.

maxHeight(SizeUnit maxHeight, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the maximum height constraint for this widget using a SizeUnit.

maxSized({SizeUnit? maxWidth, SizeUnit? maxHeight, Key? key}) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets maximum width and height constraints simultaneously.

maxWidth(SizeUnit maxWidth, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the maximum width constraint for this widget using a SizeUnit.

minHeight(SizeUnit minHeight, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the minimum height constraint for this widget using a SizeUnit.

minSized({SizeUnit? minWidth, SizeUnit? minHeight, Key? key}) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets minimum width and height constraints simultaneously.

minWidth(SizeUnit minWidth, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the minimum width constraint for this widget using a SizeUnit.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

paintOrder(int paintOrder, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the paint order for this widget within its parent container.

position(PositionType position, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the position type for this widget to control positioning context.

positioned({PositionUnit? top, PositionUnit? left, PositionUnit? bottom, PositionUnit? right, Key? key}) → Widget

Available on Widget, provided by the WidgetExtension extension

Positions the widget using multiple edge offsets simultaneously.

right(PositionUnit right, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the distance from the right edge of the parent container.

selfAligned(BoxAlignmentGeometry alignSelf, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the alignment of this widget within its parent flex container.

sized({SizeUnit? width, SizeUnit? height, Key? key}) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets both width and height dimensions simultaneously.

toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode

Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.

inherited

top(PositionUnit top, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the distance from the top edge of the parent container.

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

width(SizeUnit width, [Key? key]) → Widget

Available on Widget, provided by the WidgetExtension extension

Sets the width of this widget using a SizeUnit.

Operators

operator ==(Object other) → bool

The equality operator.

inherited