draw method
绘制核心方法
deeper
当前是否为底层绘制- 出于性能考虑
- 绘制过程为表层绘制,绘制完成抬起手指时会进行底层绘制
Implementation
@override
void draw(Canvas canvas, Size size, bool deeper) {
if (deeper) {
canvas.drawPath(
drawPath.path, paint.copyWith(blendMode: BlendMode.clear));
} else {
canvas.drawPath(drawPath.path, paint.copyWith(color: color));
}
}