使用GestureDetector跟踪鼠标位置。

// variables (or states based on your needs) to store positions
double x = 0.0;
double y = 0.0;

// a function to update mouse pointer position (location)
void updatePosition(TapDownDetails details) {
    setState(() {
      x = details.globalPosition.dx;
      y = details.globalPosition.dy;
    });
  }

// image widget
GestureDetector(
   onTapDown: updatePosition,
   child: Image.asset(yourImagePathHere)), <-- change it to your image path
),