A widget that applies a transformation before painting its child.

Sample code

This example rotates and skews an orange box containing text, keeping the top right corner pinned to its original position.

new Container(
  color: Colors.black,
  child: new Transform(
    alignment: FractionalOffset.topRight,
    transform: new Matrix4.skewY(0.3)..rotateZ(-math.PI / 12.0),
    child: new Container(
      padding: const EdgeInsets.all(8.0),
      color: const Color(0xFFE8581C),
      child: const Text('Apartment for rent!'),
    ),
  ),
)

See also:

  • RotatedBox, which rotates the child widget during layout, not just during painting.
  • FittedBox, which sizes and positions its child widget to fit the parent according to a given BoxFit discipline.
Inheritance

Constructors

Transform({Key key, @required Matrix4 transform, Offset origin, FractionalOffset alignment, bool transformHitTests: true, Widget child })
Creates a widget that transforms its child. [...]
const
Transform.rotate({Key key, @required double angle, Offset origin, FractionalOffset alignment: FractionalOffset.center, bool transformHitTests: true, Widget child })
Creates a widget that transforms its child using a rotation around the center. [...]

Properties

alignment FractionalOffset
The alignment of the origin, relative to the size of the box. [...]
final
origin Offset
The origin of the coordinate system (relative to the upper left corder of this render object) in which to apply the matrix. [...]
final
transform Matrix4
The matrix to transform the child by during painting.
final
transformHitTests bool
Whether to apply the translation when performing hit tests.
final
child Widget
The widget below this widget in the tree.
final, inherited
hashCode int
The hash code for this object. [...]
read-only, 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.
read-only, inherited

Methods

createRenderObject(BuildContext context) RenderTransform
Creates an instance of the RenderObject class that this RenderObjectWidget represents, using the configuration described by this RenderObjectWidget. [...]
updateRenderObject(BuildContext context, RenderTransform 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. [...]
createElement() SingleChildRenderObjectElement
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
debugFillDescription(List<String> description) → void
Add additional information to the given description for use by toString. [...]
@mustCallSuper, @protected, 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.
@protected, 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

Operators

operator ==(other) bool
The equality operator. [...]
inherited