onDoubleTap method Null safety

void onDoubleTap(
  1. double xPos,
  2. double yPos,
  3. double zoomFactor
)

Hits while double tapping on the chart.

  • xPos - X value of the double tap position.
  • yPos - Y value of the double tap position.
  • zoomFactor - zoom in and zoom out position

Implementation

void onDoubleTap(double xPos, double yPos, double zoomFactor);