BMap.NET.WindowsForm/DrawingObjects/BDownloadRectangle.cs

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using System.Drawing;

namespace BMap.NET.WindowsForm.DrawingObjects
{
    public class BDownloadRectangle : DrawingObject
    {
        /// <summary>
        /// 左上角屏幕坐标
        /// </summary>
        public Point LeftTop
        {
            get;
            set;
        }

        /// <summary>
        /// 矩形宽 像素
        /// </summary>
        public int Width
        {
            get;
            set;
        }

        /// <summary>
        /// 矩形高 像素
        /// </summary>
        public int Height
        {
            set;
            get;
        }

        /// <summary>
        /// 表示屏幕区域
        /// </summary>
        public Rectangle Rect
        {
            get
            {
                return new Rectangle(LeftTop, new Size(Width, Height));
            }
        }

        /// <summary>
        /// 绘制方法
        /// </summary>
        /// <param name="g"></param>
        /// <param name="center"></param>
        /// <param name="zoom"></param>
        /// <param name="screen_size"></param>
        public override void Draw(Graphics g, LatLngPoint center, int zoom, Size screen_size)
        {
            g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            using (SolidBrush sb = new SolidBrush(Color.FromArgb(100, Color.White)))
            {
                g.FillRectangle(sb, new Rectangle(LeftTop, new Size(Width, Height)));
            }
            using (Pen pen = new Pen(Color.Green))
            {