paint abstract method
Paints the animated connection effect on the canvas.
Parameters:
canvas: The canvas to draw onpath: The connection path (pre-computed and cached)basePaint: The base paint object with color, stroke width, etc.animationValue: The current animation value (0.0 to 1.0, repeating)
Implementations should use animationValue to create continuous
animations. The value continuously cycles from 0.0 to 1.0.
Implementation
void paint(Canvas canvas, Path path, Paint basePaint, double animationValue);