Mapxtreme 添加自定义工具，测量距离，测量面积等等

Mapxtreme 添加自定义工具，测量距离，测量面积等等

添加相应工具

             // 添加自定义测量距离
            mapControl.Tools.Add( " DistanceTool " ,  new  CustomPolylineMapTool( true ,  true ,  true , mapControl.Viewer, mapControl.Handle.ToInt32(), mapControl.Tools, mapControl.Tools.MouseToolProperties, mapControl.Tools.MapToolProperties));

             // 添加自定义测量面积
            mapControl.Tools.Add( " AreaTool " ,  new  CustomPolygonMapTool( true ,  true ,  true , mapControl.Viewer, mapControl.Handle.ToInt32(), mapControl.Tools, mapControl.Tools.MouseToolProperties, mapControl.Tools.MapToolProperties));

在工具条上添加相应的按钮，并捕捉当前按钮

         /**/ /// <summary>
        /// 当点击工具栏上的按钮时
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
         private   void  mapToolBar_ButtonClick( object  sender, ToolBarButtonClickEventArgs e)
         {
            try {
                string btnName = e.Button.Name;
                switch (btnName)
                {
                    case "toolBarButtonDistanceTool"://当点击“测量距离”按钮时
                        mapControl.Tools.LeftButtonTool = CustomMapTools.DistanceTool;
                        break;
                    case "toolBarButtonAreaTool"://当点击“测量面积”按钮时
                        mapControl.Tools.LeftButtonTool = CustomMapTools.AreaTool;
                        break;
                    case "toolBarButtonFullScreen":
                        SetFullScreen(true);
                        break;
                    case "toolBarButtonNormalScreen":
                        SetFullScreen(false);
                        break;
                    case "toolBarButtonMapEye":
                        SetViewMenuItemChecked(eyeUserMapControl, !鹰眼栏ToolStripMenuItem.Checked);
                        break;
                    default:
                        break;

                }
            }catch(Exception ex) {
                GlobalHelper.ShowError(ex.Message);
            }
        }

当鼠标移到地图上的时候，相应功能开始工作

         /**/ /// <summary>
        /// 当选择相应工具在地图控件上进行操作时
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
         private   void  Tools_Used( object  sender, MapInfo.Tools.ToolUsedEventArgs e)
         {
            try
            {
                switch (e.ToolName)
                {
                    //测量距离
                    case CustomMapTools.DistanceTool:
                        switch (e.ToolStatus)
                        {
                            case ToolStatus.Start:
                                dblDistance = 0;
                                dptStart = e.MapCoordinate;
                                break;
                            case ToolStatus.InProgress:
                                dblDistance += CoordSys.Distance(DistanceType.Spherical, map.Zoom.Unit, map.GetDisplayCoordSys(), dptStart, e.MapCoordinate);
                                SetStatusStripMessage("总长度为:" + string.Format("{0:F3}", dblDistance) + " " + CoordSys.DistanceUnitAbbreviation(map.Zoom.Unit).ToString());
                                dptStart = e.MapCoordinate;
                                break;
                            case ToolStatus.End:
                                dblDistance += CoordSys.Distance(DistanceType.Spherical, map.Zoom.Unit, map.GetDisplayCoordSys(), dptStart, e.MapCoordinate);
                                SetStatusStripMessage("总长度为:" + string.Format("{0:F3}", dblDistance) + " " + CoordSys.DistanceUnitAbbreviation(map.Zoom.Unit).ToString());
                                map.Invalidate(true);
                                break;
                            default:
                                break;
                        }
                        break;
                    //测量面积
                    case CustomMapTools.AreaTool:
                        switch (e.ToolStatus)
                        {
                            case ToolStatus.Start:
                                arrlstPoints.Clear();
                                dptFirstPoint = e.MapCoordinate;
                                arrlstPoints.Add(e.MapCoordinate);
                                break;
                            case ToolStatus.InProgress:
                                arrlstPoints.Add(e.MapCoordinate);
                                break;
                            case ToolStatus.End:
                                //构造一个闭合环
                                arrlstPoints.Add(e.MapCoordinate);
                                int intCount = arrlstPoints.Count;
                                if (intCount <= 3)
                                {
                                    SetStatusStripMessage("请画3个以上的点形成面来测量你所要的面积");
                                    return;
                                }
                                DPoint[] dptPoints = new DPoint[intCount];
                                for (int i = 0; i <= intCount - 1; i++)
                                {
                                    dptPoints[i] = (DPoint)arrlstPoints[i];

                                }
                                dptPoints[intCount - 1] = dptFirstPoint;

                                //用闭合的环构造一个面        
                                AreaUnit costAreaUnit;
                                costAreaUnit = CoordSys.GetAreaUnitCounterpart(map.Zoom.Unit);
                                CoordSys objCoordSys = this.map.GetDisplayCoordSys();
                                Polygon objPolygon = new Polygon(objCoordSys, CurveSegmentType.Linear, dptPoints);
                                //if (objPolygon == null)
                                //    return;
                                SetStatusStripMessage("总面积为:" + string.Format("{0:F3}", objPolygon.Area(costAreaUnit)) + "  " + CoordSys.AreaUnitAbbreviation(costAreaUnit));
                                map.Invalidate(true);
                                break;
                            default:
                                break;
                        }
                        break;
                    //可以添加其他的用户自定义Tool
                    default:
                        break;
                }
            }
            catch (Exception Ex)
            {
                GlobalHelper.ShowError("测量错误:" + Ex.Message.ToString());
            }            
        }

---------------------------------------------------------
专注移动开发
Android, Windows Mobile, iPhone, J2ME, BlackBerry, Symbian