ScalingTransform class

A coordinate system transformation to fit a ScalableImage into a given container, for a given BoxFit and Alignment. This class is offered as a convenience for scaling ScalableImage instances. It also helps converting positions as rendered back into the ScalableImage's coordinate, e.g. when mapping a touch event into the original SVG's coordinate space.

Constructors

ScalingTransform({required Size containerSize, required Rect siViewport, BoxFit fit = BoxFit.contain, Alignment alignment = Alignment.center})

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

scaleX → double

The horizontal scale factor

final

scaleY → double

The vertical scale factor

final

siViewport → Rect

The ScalableImage.viewport of the image being transformed.

final

translateX → double

The horizontal translation, before scaling is applied. This does not include any translation to the SI's viewport's origin. cf. ScalableImage.paint.

final

translateY → double

The vertical translation, before scaling is applied. This does not include any translation to the SI's viewport's origin. cf. ScalableImage.paint.

final

Methods

applyToCanvas(Canvas canvas) → void

Apply this transform to the given Canvas, by first translating and then by scaling.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toContainerCoordinate(Offset si) → Offset

Transform a point from the coordinate system of the ScalableImage into the container's coordinate system. This method adjusts for the origin of the SI's viewport.

toSICoordinate(Offset c) → Offset

Transform a point from the coordinate system of the container into the ScalableImage's coordinate system. This method adjusts for the origin of the SI's viewport.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited