OTS/OTSIncAMeasureApp/4-OTSSamplespaceGraphicsPanel/VisualGDIObjects/CVisualFieldGDIObject.cs

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace OTSMeasureApp._4_OTSSamplespaceGraphicsPanel
{
    public class CVisualFieldGDIObject : CDisplayGDIObject
    {
        private int m_sequenceNum;
        private bool m_enable;
        public CVisualFieldGDIObject(RectangleF rectField, int OTSx, int OTSy, string name, string sampleName, Color selColor)
        {

            m_OrigineRegionF = rectField;
            SetInitRegionF(m_OrigineRegionF);

            NameOrHoleName = name;          
            SelColor = selColor;
            SampleName = sampleName;
            ID = System.Guid.NewGuid().ToString();
            OTSX = OTSx;
            OTSY = OTSy;
        }
        public int SequenceNum { get => m_sequenceNum; set => m_sequenceNum = value; }
        public bool Enable { get => m_enable; set => m_enable = value; }

        public override void OnPaint(PaintEventArgs e)
        {

            Color myColor = SelColor;
            System.Drawing.SolidBrush sampleBrush = new System.Drawing.SolidBrush(myColor);
            Pen pen;
            if (m_enable)
            {
                pen = new Pen(sampleBrush, 0.01f);
            }
            else
            {
                pen = new Pen(new SolidBrush(Color.Gray), 0.01f);
            }

            e.Graphics.SmoothingMode = SmoothingMode.Default;
            //设置直线位置与尺寸
            PointF startPointF = new PointF(m_RegionF.Left, m_RegionF.Top);
            PointF endPointF = new PointF(m_RegionF.Right, m_RegionF.Bottom);
            if (m_RegionF.Height > 20)//won't display when it's too small,to speed up
            {
                float fontSize = m_RegionF.Width / 4;
                Font font;
                if (fontSize == 0)
                {
                    font = new Font("宋体", 5, FontStyle.Regular);
                }
                else
                {
                    font = new Font("宋体", fontSize, FontStyle.Regular);
                }

                StringFormat sf = new StringFormat();
                sf.Alignment = StringAlignment.Center;
                sf.LineAlignment = StringAlignment.Center;

                e.Graphics.DrawString(m_sequenceNum.ToString(), font, sampleBrush, m_RegionF, sf);
            }

            //绘制帧图
            e.Graphics.DrawRectangle(pen, startPointF.X, startPointF.Y, endPointF.X - startPointF.X, endPointF.Y - startPointF.Y);


        }
    }
}