handleScaleUpdate method

void handleScaleUpdate(
  1. double scaleFactor,
  2. Offset focalDelta
)

A two-plus finger gesture: scaleFactor is the incremental pinch factor since the last update (>1 spreading, <1 pinching) and focalDelta is the centroid movement in logical pixels.

Implementation

void handleScaleUpdate(double scaleFactor, Offset focalDelta) {}