MapX二次开发实习讲义.doc

MapX二次开发实习讲义一、 创建一个MapX工程1、 新建VC工程Step 1：新建工程Step 2：选择Single DocumentStep 3：选择CFormView2、 添加MapX组件Step 1：选择Project-Add to Project-ComponentStep 2：选择MapX组件Step 3：选择只添加一个MapX对象CCMapXStep 4：将MapX组件添加到Form，并定义变量Step 5：为MapX控件定义变量3、 工程整理Step 1：将MAPX.H、MAPX.CPP拷贝至工程目录Step2：从工程目录中删除cmapx.h,cmapx.cpp文件，并在FileView中删除Step3：选择Project-Add to Project-Files将MAPX.H、MAPX.CPP加到工程中Step4：在Stdafx.h中添加#Include “MapX.h”Step5：编译程序，会弹出编译错误Step6：点击错误出，程序定位到错误代码，删除#Include “cmapx.h”，并将CCMapX对象改成CMapXStep7：编译工程，成功，一个标准的MapX工程创建成功。二、 加载图层方式1：加载GeoSet图层集在工程中添加按钮或菜单，添加如下代码：CFileDialog dlg(TRUE,NULL);CString strGeoset;if(dlg.DoModal()=IDOK)strGeoset = dlg.GetPathName();/加载Geoset的方法，为Map的方法m_Map.SetGeoSet(strGeoset);方式2：调用Layer 管理对话框CMapXLayers layers;layers = m_Map.GetLayers();layers.LayersDlg();方式3：添加单个图层CMapXLayers layers = m_Map.GetLayers();CFileDialog dlg(TRUE,NULL);CString str;if(dlg.DoModal()=IDOK)str = dlg.GetPathName();layers.Add(str,1);三、 图层管理1、图层数量CMapXLayers layers = m_Map.GetLayers();int nLayerCount = layers.GetCount();2、遍历图层for(int i=0;inLayerCount;i+)CMapXLayer layer = layers.Item(i+1);m_Layers.AddString(layer.GetName();AfxMessageBox(layer.GetName(); 遍历图层可以得到每一个图层对象Layer，并对每一个图层对象可以遍历图层对象的属性、操作图层。如设置图层的可见性：layer.SetVisible(FALSE);3、得到层中所有特征CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);CMapXFeatures fs; fs=layer.AllFeatures(); m_ListInfo.ResetContent();/遍历层对象 for(int i=0;ifs.GetCount();i+) m_ListInfo.AddString(fs.Item(i+1).GetName();/m_ListInfo为定义的ListBox控件 四、 地图操作1、地图放大m_Map.SetCurrentTool(1003);2、地图缩小m_Map.SetCurrentTool(1004);3、地图漫游m_Map.SetCurrentTool(miPanTool);4、设置鼠标状态m_Map.SetMousePointer(miCrossCursor);5、 全图操作CMapXLayers layers = m_Map.GetLayers();CMapXRectangle rect = layers.GetBounds();m_Map.SetBounds(rect);五、 事件响应1、获取鼠标漫游地图坐标Step1：给地图添加鼠标漫游事件，右键点击地图Step2：添加MouseMoveMap1消息Step3：在MouseMoveMap1消息中添加函数获取坐标double dX,dY;m_Map.ConvertCoord(&X,&Y,&dX,&dY,miScreenToMap );m_X = dX; /m_X为事先在工程中定义的Edit变量m_Y = dY; /m_Y为事先在工程中定义的Edit变量UpdateData(FALSE);2、量距操作Step1：定义自定义工具，与一个菜单或按钮关联m_Map.CreateCustomTool(102,miToolTypeLine,miSizeCursor);m_Map.SetCurrentTool(102);Step2：添加ToolUsed事件Step3：在ToolUsed消息中添加响应获取量距距离操作的代码if(ToolNum=102)CString str;str.Format(Distance = %.2f,Distance);AfxMessageBox(str);3、量面积操作（响应PolylineUsed事件，与量距相同）m_Map.CreateCustomTool(302,miToolTypePoly, miSizeCursor);m_Map.SetCurrentTool(302);m_Map.SetMousePointer(miCrossCursor);六、 属性查询/定义图层UpdateData(TRUE);CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);/定义查询对象CMapXLayerFind find = layer.GetFind();/得到查询对象 CMapXFindFeature FoundObject;FoundObject = find.Search(m_Query);/获取查询对象信息CString str;if(FoundObject.GetType()=0)/判断地物是否为多边形 str.Format(Area = %.2f,FoundObject.GetArea(); str=FoundObject.GetName()+s Area is: +str;AfxMessageBox(str);/将地图定位至查询对象的中心double dX,dY;dX = FoundObject.GetCenterX();dY = FoundObject.GetCenterY();m_Map.SetCenterX(dX);m_Map.SetCenterY(dY);/将查询对象放至选择集CMapXSelection Selection = layer.GetSelection();Selection.SelectByPoint(dX,dY, miSelectionNew);七、 空间查询1、点查询Step1：定义自定义空间查询工具，与一个菜单或按钮关联m_Map.CreateCustomTool(202,miToolTypePoint,miCrossCursor);m_Map.SetCurrentTool(202);Step2：在ToolUsed消息中添加响应点查询操作的代码/点空间查询else if(ToolNum=202)CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);CMapXPoint point;CMapXFeatures fs;CString str;if(!point.CreateDispatch(point.GetClsid()return; point.Set(double)X1,(double)Y1);/查询语句 fs=layer.SearchAtPoint(point,miSearchResultAll); for(int n=0;nfs.GetCount();n+) if(fs.Item(n+1).GetType()=0)/判断获得的地物的形状是否为多边形str.Format( The Aera of %s is:%lfrn,fs.Item(n+1).GetName(),fs.Item(n+1).GetArea(); else str.Format( the ID of %s is:%srn ,fs.Item(n+1).GetName(),fs.Item(n+1).GetFeatureID(); str=the result searched by Point is:rn+str;AfxMessageBox(str);m_Map.SetCenterX(X1); m_Map.SetCenterY(Y1);/把查询结果放入选择集中显示CMapXSelection Selection=layer.GetSelection();Selection.SelectByPoint(X1,Y1,0);2、圆查询Step1：定义自定义空间（圆）查询工具，与一个菜单或按钮关联m_Map.CreateCustomTool(203,miToolTypeCircle,miCrossCursor);m_Map.SetCurrentTool(203);Step2：在ToolUsed消息中添加响应点查询操作的代码else if(ToolNum=202)CMapXFeatures fs;CMapXPoint point;if(!point.CreateDispatch(point.GetClsid()TRACE0(Failed to Create Circle Pobject);return;point.Set(X1,Y1);CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);fs=layer.SearchWithinDistance(point,Distance,0,miSearchResultAll);/圆查询的范围m_Map.SetCenterX(X1);m_Map.SetCenterY(Y1);CMapXSelection Selection =layer.GetSelection();Selection.SelectByRadius(X1,Y1,Distance, 0);Invalidate();3、矩形查询Step1：定义自定义空间（矩形）查询工具，与一个菜单或按钮关联m_Map.CreateCustomTool(204,miToolTypeMarquee,miCrossCursor);m_Map.SetCurrentTool(204);Step2：在ToolUsed消息中添加响应点查询操作的代码else if(ToolNum=202)CMapXFeatures fs;CMapXRectangle rec;if(!rec.CreateDispatch(rec.GetClsid() TRACE0(Failed to Create Rectangle Pobject); return; rec.Set(X1,Y1,Y1,Y2);CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);fs=layer.SearchWithinRectangle(rec,miSearchResultAll);/矩形查询的范围m_Map.SetCenterX(X1);m_Map.SetCenterY(Y1);CMapXSelection Selection =layer.GetSelection();Selection.SelectByRectangle(X1,Y1,X2,Y2, 0);Invalidate();八、 数据绑定（访问属性字段）CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);COleVariant rsVariant; rsVariant.vt = VT_DISPATCH;rsVariant.pdispVal = layer;CMapXDatasets datasets = m_Map.GetDatasets();/datasets.Add(miDataSetLayer,rsVariant);CMapXDataset dataset = datasets.Item(1);CMapXFields fields = dataset.GetFields();for(int i=0;ifields.GetCount();i+)/CMapXField field = fields.Item(i+1);AfxMessageBox(fields.Item(i+1).GetName();九、 专题图1、制作专题图CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);COleVariant rsVariant; rsVariant.vt = VT_DISPATCH;rsVariant.pdispVal = layer;/绑定层的属性数据表CMapXDatasets datasets = m_Map.GetDatasets();datasets.Add(miDataSetLayer,rsVariant);CMapXDataset dataset = datasets.Item(1);CMapXThemes themes = dataset.GetThemes();if(themes.GetCount!=0)themes.RemoveAll();themes.Add(miThemeDotDensity, 4,AAA);CMapXTheme theme = themes.Item(AAA);theme.ThemeDlg();2、自动注记CMapXLayers layers=m_Map.GetLayers();layers.Item(1).SetAutoLabel(TRUE);3、得到每一个对象中字段值CMapXLayers layers=m_Map.GetLayers();CMapXLayer layer = layers.Item(1);COleVariant rsVariant; rsVariant.vt = VT_DISPATCH;rsVariant.pdispVal = layer;CMapXDatasets datasets = m_Map.GetDatasets();/datasets.Add(miDataSetLayer,rsVariant);CMapXDataset dataset = datasets.Item(1);CMapXFields fields = dataset.GetFields();long RowCount = dataset.GetRowCount();long FieldsCount = fields.GetCount();COleVariant valueVt;for(int i=0;iAddRef();CMapXFeatureFactory cFactory= m_Map.GetFeatureFactory();/创建特征对象feature = cFactory.CreateLine(vtPoints);feature.SetType(miFeatureTypeLine);/设置线型CMapXStyle style=feature.GetStyle();style.SetLineColor(miColorRed);style.SetLineStyle(93);feature.SetStyle(style.m_lpDispatch);/将结果添加到图层里面m_LineLayer.AddFeature(feature);Invalidate();3、添加面对象Step1：定义自定义空间添加线工具，与一个菜单或按钮关联m_Map.CreateCustomTool(303,miToolTypePolygon, miSizeCursor);m_Map.SetCurrentTool(303);Step2：在OnPolyToolUsedMap1消息中添加面操作的代码/添加多边形else if(ToolNum=303)CMapXLayers layers=m_Map.GetLayers();CMapXFeature feature; /声明Feature变量if(!feature.CreateDispatch(feature.GetClsid() TRACE0(Failed to Create Feature object); return;/创建图层if(m_PolyLayer=NULL)m_PolyLayer = layers.CreateLayer(PolyLayer);elsem_PolyLayer = layers.Item(PolyLayer);CMapXPoints pts; pts.AttachDispatch(Points,FALSE);COleVariant vtPoints;vtPoints.vt = VT_DISPATCH;vtPoints.pdispVal = pts.m_lpDispatch;vtPoints.pdispVal-AddRef();CMapXFeatureFactory cFactory= m_Map.GetFeatureFactory();/创建特征对象feature = cFactory.CreateRegion(vtPoints);/设置线型CMapXStyle style=feature.GetStyle();style.SetRegionPattern(miPatternCross); /设置填充方式style.SetRegionBorderColor(miColorRed); /设置边框颜色style.SetRegionBorderWidth(2); /设置边框宽度feature.SetStyle(style.m_lpDispatch);/将结果添加到图层里面m_PolyLayer.AddFeature(feature);Invalidate();十二、 鹰眼地图Step 1 :往鹰眼视图中添加地图/给鹰眼添加数据m_MapEye.SetGeoSet(strGeoset);m_MapEye.GetLayers().Add(str,1);Step 2: 创建鹰眼视图中的位置矩形框图层m_MapEye.GetLayers().CreateLayer(Rectangle);Step 3：添加主视图刷新事件，并将当前的主视图地图范围转化为矩形，并在鹰眼的矩形框图层中画之if(!hasLoad)return; double X1,Y1,X2,Y2; /声明坐标变量/声明FeatureFactory变量并获取缺省值CMapXFeatureFactory cFactory=m_MapEye.GetFeatureFactory();CMapXLayer layer; /声明图层变量CMapXFeature feature; /声明Feature变量CMapXFeatures features; /声明Features变量CMapXPoints points; /声明Points变量points.CreateDispatch(points.GetClsid();CMapXRectangle rect; /声明矩形变量rect.CreateDispatch(rect.GetClsid();/获取主图的边界，根据这个边界值，在鹰眼图上添加一个矩形Featurerect = m_Map.GetBounds();X1 = rect.GetXMin(); /获得矩形左上顶点x坐标Y1 = rect.GetYMin(); /获得矩形左上顶点y坐标X2 = rect.GetXMax(); /获得矩形右下顶点x坐标Y2 = rect.GetYMax(); /获得矩形右下顶点y坐标/得到添加矩形Feature的图层layer=m_MapEye.GetLayers().Item(Rectangle);features=layer.AllFeatures();/没有添加矩形Feature的图层，则新建if(features.GetCount() = 0)/添加四个顶点构成一个矩形框points.AddXY(X1,Y1); /添加顶点1points.AddXY(X1,Y2); /添加顶点2points.A