涓や釜鎺т欢鐢荤嚎 (plot鐢荤嚎鎺т欢)

前两天发了一个相关的视频，效果不是很好，直接上代码，就不用看那十几分钟的视频啦

public class Line:Panel
    {
        public enum Direction
        { 
            Vertical,
            Horizon
        }


        private float _line_width = 1;
        private Color _line_color = Color.Black;
        private Direction _direction = Direction.Horizon;

        public Line()
        {
            this.SetStyle(ControlStyles.UserPaint, true);
        }

        [Description("设置线宽")]
        [Category("自定义")]
        public float LineWidth
        {
            get { return _line_width; }
            set
            {
                _line_width = value <= 0 ? 1 : value;
                this.Invalidate();
            }
        }

        [Description("设置线的颜色")]
        [Category("自定义")]
        public Color LineColor
        {
            get { return _line_color; }
            set
            {
                this._line_color = value;
                this.Invalidate();
            }
        }

        [Description("设置线的方向")]
        [Category("自定义")]
        public Direction LineDirection
        {
            get { return _direction; }
            set
            {
                _direction = value;
                this.Invalidate();
            }
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            Rectangle rec = this.ClientRectangle;

            Point pStart;
            Point pEnd ;
            switch (_direction)
            {
                case Direction.Vertical:
                    int x = rec.Width/ 2;
                    int xd2 = x;
                    pStart = new Point(x, rec.Y);
                    pEnd = new Point(x, rec.Height);

                    e.Graphics.DrawLine(new Pen(_line_color, _line_width), pStart, pEnd);

                    break;
                case Direction.Horizon:
                    int y = rec.Height / 2;
                    int yd2 = y;

                    pStart = new Point(rec.X, y);
                    pEnd = new Point(rec.Width, y);

                    e.Graphics.DrawLine(new Pen(_line_color, _line_width), pStart, pEnd);

                    break;
                default:
                    break;
            }
        }
    }

运行效果图：

主页有那个很长的视频，有兴趣的也可以看下哦（不建议看，太费时间！）