AE基础(4)画几何图形

using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Geometry;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Ch02Ex05
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        int flag = 0;
        private void btnDrawLine_Click(object sender, EventArgs e)
        {
            flag = 1;//画线对象
        }

        private void btnDrawCircle_Click(object sender, EventArgs e)
        {
            flag = 2;//画圆对象
        }

        private void btnDrawRect_Click(object sender, EventArgs e)
        {
            flag = 3;//画矩形对象
        }

        private void btnDrawPolygon_Click(object sender, EventArgs e)
        {
            flag = 4;//画面对象
        }

        private void btnDrawText_Click(object sender, EventArgs e)
        {
            flag = 5;//画文本对象
        }
        private void DrawMapText(IGeometry geometry)
        {
            IRgbColor rgbColor = new RgbColor();
            rgbColor.Red = 225;
            rgbColor.Blue = 0;
            rgbColor.Green = 0;
            ITextSymbol txtSymbol = new TextSymbol();
            txtSymbol.Color = rgbColor;
            object symbol = txtSymbol;
            axMapControl1.DrawText(geometry, "测试文本", ref symbol);
        }
        private void DrawMapShape(IGeometry pGeo)
        {
            IRgbColor rgbColor = new RgbColor();
            rgbColor.Red = 255;
            rgbColor.Blue = 0;
            rgbColor.Green = 255;
            object symbol = null;
            if (pGeo.GeometryType == esriGeometryType.esriGeometryPolyline)
            {
                ISimpleLineSymbol simpleLine = new SimpleLineSymbol();
                simpleLine.Color = rgbColor;
                simpleLine.Width = 5;
                symbol = simpleLine;
            }
            else
            {
                ISimpleFillSymbol fillSymbol = new SimpleFillSymbol();
                fillSymbol.Color = rgbColor;
                symbol = fillSymbol;
            }
            axMapControl1.DrawShape(pGeo, ref symbol);
        }

        private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)
        {
            IGeometry geometry = null;
            if (flag == 1)
            {
                geometry = axMapControl1.TrackLine();
            }
            else if (flag == 2)
            {
                geometry = axMapControl1.TrackCircle();
            }
            else  if (flag == 3)
            {
                geometry = axMapControl1.TrackRectangle();
            }
            else if (flag == 4)
            {
                geometry = axMapControl1.TrackPolygon();
            }
            else if (flag == 5)
            {
                IPoint point = new ESRI.ArcGIS.Geometry.Point();
                point.X = e.mapX;
                point.Y = e.mapY;
                geometry = point as IGeometry;
            }
            if (flag == 5)
            {
                DrawMapText(geometry);
            }
            if (flag >= 1 && flag <= 4)
            {
                DrawMapShape(geometry);
            }
        }
    }
}