PathMetric class Null safety

Utilities for measuring a Path and extracting sub-paths.

Iterate over the object returned by Path.computeMetrics to obtain PathMetric objects. Callers that want to randomly access elements or iterate multiple times should use path.computeMetrics().toList(), since PathMetrics does not memoize.

Once created, the metrics are only valid for the path as it was specified when Path.computeMetrics was called. If additional contours are added or any contours are updated, the metrics need to be recomputed. Previously created metrics will still refer to a snapshot of the path at the time they were computed, rather than to the actual metrics for the new mutations to the path.

Properties

contourIndex → int
The zero-based index of the contour.
final
hashCode → int
The hash code for this object.
read-onlyinherited
isClosed → bool
Whether the contour is closed.
final
length → double
Return the total length of the current contour.
final
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited

Methods

extractPath(double start, double end, {bool startWithMoveTo = true}) → Path
Given a start and end distance, return the intervening segment(s).
getTangentForOffset(double distance) → Tangent?
Computes the position of the current contour at the given offset, and the angle of the path at that point.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toString() → String
A string representation of this object.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited