addBox method Null safety

void addBox(
  1. int x1,
  2. int y1,
  3. int x2,
  4. int y2,
  5. int lineWidth
)

添加矩形

x1 起点X坐标 y1 起点Y坐标 x2 终点X坐标 y2 终点Y坐标 lineWidth 线宽

Implementation

void addBox(int x1, int y1, int x2, int y2, int lineWidth) {
  addString("BOX $x1,$y1,$x2,$y2,$lineWidth\r\n");
}