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.new({required Size containerSize, required Rect siViewport, BoxFit fit = BoxFit.contain, Alignment alignment = Alignment.center})
Create a scaling transform to display a ScalableImage in a container of containerSize where the ScalableImage.viewport's value is siViewport, for the given box fit and alignment.
factory

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
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