Transform class
A widget that applies a transformation before painting its child.
This example rotates and skews an orange box containing text, keeping the
top right corner pinned to its original position.
Container(
color: Colors.black,
child: Transform(
alignment: Alignment.topRight,
transform: Matrix4.skewY(0.3)..rotateZ(-math.pi / 12.0),
child: 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.
- FractionalTranslation, which applies a translation to the child that is relative to the child's size.
- 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, AlignmentGeometry alignment, bool transformHitTests: true, Widget child })
-
Creates a widget that transforms its child. [...]
const
- Transform.rotate({Key key, @required double angle, Offset origin, AlignmentGeometry alignment: Alignment.center, bool transformHitTests: true, Widget child })
- Creates a widget that transforms its child using a rotation around the center. [...]
- Transform.scale({Key key, @required double scale, Offset origin, AlignmentGeometry alignment: Alignment.center, bool transformHitTests: true, Widget child })
- Creates a widget that scales its child uniformly. [...]
- Transform.translate({Key key, @required Offset offset, bool transformHitTests: true, Widget child })
- Creates a widget that transforms its child using a translation. [...]
Properties
- alignment → AlignmentGeometry
-
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 transformation 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. [...]
override
-
updateRenderObject(
BuildContext context, covariant 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. [...]
override
-
createElement(
) → SingleChildRenderObjectElement -
RenderObjectWidgets always inflate to a RenderObjectElement subclass.
inherited
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children. [...]
@protected, inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node. [...]
inherited
-
didUnmountRenderObject(
covariant 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
-
toDiagnosticsNode(
{String name, DiagnosticsTreeStyle style }) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by toStringDeep. [...]
inherited
-
toString(
{DiagnosticLevel minLevel: DiagnosticLevel.debug }) → String -
Returns a string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) → 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
Operators
-
operator ==(
dynamic other) → bool -
The equality operator. [...]
inherited