C#+mapx实现鹰眼功能源代码

来源：互联网发布：java中对象是什么编辑：程序博客网时间：2024/05/22 08:02

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先添加两个mapx地图控件，一个做主视图Map1，另一个做鹰眼地图MapEye。
1.
/// <summary>
        /// 在鹰眼地图中添加矩形框
        /// </summary>
        private void DrawRect() //在鹰眼地图中添加矩形框函数
        {
                if (MapEye.Layers._Item("Eyelay").AllFeatures.Count == 0)
                {
                    MapXLib.Feature fea = new MapXLib.FeatureClass();
                    MapXLib.Style sty = new MapXLib.StyleClass();
                    try
                    {

                        sty.RegionPattern = MapXLib.FillPatternConstants.miPatternNoFill;
                        sty.RegionColor = 155;
                        sty.RegionBorderWidth = 1;
                        MapXLib.Points pts = new MapXLib.PointsClass();
                        pts.AddXY(axMap1.CtlBounds.XMin, axMap1.CtlBounds.YMin, 1);
                        pts.AddXY(axMap1.CtlBounds.XMax, axMap1.CtlBounds.YMin, 2);
                        pts.AddXY(axMap1.CtlBounds.XMax, axMap1.CtlBounds.YMax, 3);
                        pts.AddXY(axMap1.CtlBounds.XMin, axMap1.CtlBounds.YMax, 4);
                        fea = MapEye.FeatureFactory.CreateRegion(pts,sty);
                        FeaEye = MapEye.Layers._Item("Eyelay").AddFeature(fea,new MapXLib.RowValuesClass());
                        FeaEye.Update(FeaEye,new MapXLib.RowValuesClass());
                    }
                    catch (Exception ea)
                    { MessageBox.Show(ea.Message.ToString() + "/n没有矩形图元"); }
                }
                else
                {
                    try
                    {
                        FeaEye.Parts._Item(1).RemoveAll();
                        FeaEye.Parts._Item(1).AddXY(axMap1.CtlBounds.XMin, axMap1.CtlBounds.YMin, 1);
                        FeaEye.Parts._Item(1).AddXY(axMap1.CtlBounds.XMax, axMap1.CtlBounds.YMin, 2);
                        FeaEye.Parts._Item(1).AddXY(axMap1.CtlBounds.XMax, axMap1.CtlBounds.YMax, 3);
                        FeaEye.Parts._Item(1).AddXY(axMap1.CtlBounds.XMin, axMap1.CtlBounds.YMax, 4);
                        FeaEye.Update(FeaEye, new MapXLib.RowValuesClass());
                    }
                    catch (Exception en)
                    { MessageBox.Show(en.Message.ToString() + "/n更新图元"); }
                }

            }
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2.
        private void Map_Emulate_Load(object sender, EventArgs e) //窗口初始化
        {

            //鹰眼

            try        //创建临时图层
            {
                MapXLib.LayerInfo lay=new MapXLib.LayerInfoClass();
                MapXLib.Fields fld = new MapXLib.FieldsClass();
                fld.AddStringField("ID", 20, false);
                fld.AddStringField("Name", 100, false);
                lay.Type = MapXLib.LayerInfoTypeConstants.miLayerInfoTypeTemp;
                lay.AddParameter("Name", "Eyelay");
                lay.AddParameter("Fields", fld);
                LayEye= MapEye.Layers.Add(lay, 1);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString());
            }
            //在鹰眼地图中添加矩形框
             DrawRect();
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3.当视图改变时，鹰眼相应改变实现代码
        private void MapEye_MouseDownEvent(object sender, AxMapXLib.CMapXEvents_MouseDownEvent e)// 鹰眼。绑定主图的中兴坐标
        {
            MapEye.MousePointer = MapXLib.CursorConstants.miPanCursor;
            if (e.button == 1)
            {
                MapEye.MousePointer = MapXLib.CursorConstants.miPanCursor;
                eyemove = true;
                double mapx = 0.0;
                double mapy = 0.0;
                MapEye.ConvertCoord(ref e.x, ref e.y, ref mapx, ref mapy, MapXLib.ConversionConstants.miScreenToMap);
                axMap1.CenterX = mapx;
                axMap1.CenterY = mapy;
            }
        }

        private void axMap1_SizeChanged(object sender, EventArgs e) //主视图改变时，重绘鹰眼地图中的矩形框
        {
            DrawRect();
        }

        private void axMap1_MapViewChanged(object sender, EventArgs e)//地图变化时，重绘鹰眼地图中的矩形框
        {
            DrawRect();
        }