ArcGIS Engine 中的绘制与编辑

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ArcGIS Engine 中的绘制与编辑

橘子红了呐 2018-01-21 20:35:16 浏览2538
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1、线段绘制

基本步骤

构建形状

1. 创建 IPoint
IPoint m_Point = new PointClass();
m_Point.PutCoords(x, y);

2. 创建 IPointCollection
IPointCollection m_PointCollection = new PolylineClass();
m_PointCollection.AddPoint(m_Point, ref Type.Missing, ref Type.Missing);

3. 创建 IPolyline
IPolyline m_Polyline = new PolylineClass();
m_Polyline = m_PointCollection as IPolyline;

4. 创建 IElement
// Element 不能实例化,需要用其派生类实例化
IElement m_Element = m_SimpleLineSymbol as IElement;
m_Element.Geometry = m_Polyline;

设置形状样式
1. 创建 ISimpleLineSymbol
ISimpleLineSymbol m_SimpleLineSymbol = new SimpleLineSymbolClass();

2. 创建 ILineElement
ILineElement m_LineElement = new LineElementClass();
m_LineElement.Symbol = m_SimpleLineSymbol;

加载到地图
IMap m_Map = axMapControl1.Map;
IActiveView m_ActiveView = m_Map as IActiveView;
IGraphicsContainer m_Container = m_Map as IGraphicsContainer;

m_Container.AddElement(m_Element, 0);

m_Active.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);

 

 

-----------------------------------------------------------------------------------------------------------

其他方法

 View Code

2、编辑

点编辑:

复制代码
IPoint pt;  
pt = axMapControl1.ToMapPoint(e.x, e.y);  
IMarkerElement pMarkerElement;  
pMarkerElement = new MarkerElementClass();  
IElement pElement;  
pElement = pMarkerElement as IElement;  
pElement.Geometry = pt;  
pGraphicsContainer = pMap as IGraphicsContainer;  
pGraphicsContainer.AddElement((IElement)pMarkerElement, 0);  
pActiveView.Refresh(); 
复制代码

 

线编辑:

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IGeometry polyline; 
polyline = axMapControl1.TrackLine(); 
ILineElement pLineElement; 
pLineElement = new LineElementClass(); 
IElement pElement; 
pElement = pLineElement as IElement; 
pElement.Geometry = polyline; 
pGraphicsContainer = pMap as IGraphicsContainer; 
pGraphicsContainer.AddElement((IElement)pLineElement, 0); 
pActiveView.Refresh(); 

 

 面编辑:

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IGeometry Polygon; 
Polygon = axMapControl1.TrackPolygon(); 
IPolygonElement PolygonElement; 
PolygonElement = new PolygonElementClass(); 
IElement pElement; 
pElement = PolygonElement as IElement; 
pElement.Geometry = Polygon; 
pGraphicsContainer = pMap as IGraphicsContainer; 
pGraphicsContainer.AddElement((IElement)PolygonElement, 0); 
pActiveView.Refresh(); 

 

 

 

ArcEngine中画shape点的另一种方法

复制代码
public override void OnMouseDown(int Button, int Shift, int X, int Y)  
{  
     
    //base.OnMouseDown(Button, Shift, X, Y);  
    IFeatureLayer pFeatureLayer = mapControl.Map.get_Layer(0) as IFeatureLayer;  
    IFeatureClass fc = pFeatureLayer.FeatureClass;  
    IFeatureClassWrite fr = fc as IFeatureClassWrite;  
    IWorkspaceEdit pWorkspaceEdit = (fc as IDataset).Workspace as IWorkspaceEdit;  
      
    IFeature pFeature;  
    IPoint pPoint;  
    //开始事物操作  
    pWorkspaceEdit.StartEditing(false);  
      
    //开始编辑  
    pWorkspaceEdit.StartEditOperation();  
      
    pFeature = fc.CreateFeature();  
    pPoint = new PointClass();  
    IPoint Mp = mapControl.ToMapPoint(X, Y);  
    pPoint.PutCoords(Mp.X, Mp.Y);  
    pPoint.SpatialReference = mapControl.SpatialReference;  
    pFeature.Shape = pPoint;  
    pFeature.Store();  
    mapControl.ActiveView.Refresh();  
    if (Button == 2)  
    {  
        pWorkspaceEdit.StopEditOperation();  
        pWorkspaceEdit.StopEditing(true);  
    }  
}  
复制代码

3、绘制Element、Symbol 在控件上

做符号预览的时候需要将ISymbol或IElement绘制到指定的控件上,下面边码边说,一起讨论讨论:

3.1 绘制在Panel上

ISymbol接口有Draw函数,查询其接口可以发现,我们需要执行ISymbol.SetupDC -> ISymbol.Draw -> ISymbol.ResetDC 这三个步骤;

首先SetupDC需要参数 hDC和IDisplayTransformation;贴代码:

例如:绘制在Panel上:

复制代码
int width=Panel.Width;
int heigth=Panel.Heigth;
//绘制方法
Graphics graph=Graphics.FromHwnd(Panel.Handle);
graph.Clear(Panel.BackColor);
//分辨率
double dpi=graph.DpiX;
IEnvelope pEnve=new EnvelopeClass();
pEnve.PutCoords(0,0,width,heigth);
Ipoint pCenterPt=new PointClass;
pCenter.PutCoords(width/2,height/2);
 
tagRECT myRect=new tagRECT();
设置MyRect 的 top=0;bottom=heigh; left=0,right=width;

IDisplayransformation pDisTrans=new  DisplayTrabsformation();
pDisTrans.VisiableBounds=pEnve;
pDisTrans.Bounds=pEnv;
pDisTrans.Set_DeviceFrame(ref myRect);
pDisTrans.Resolution=dpi;
 
intPtr hdc=graph.GetHdc();
ISymbol.SetupDC(hec.ToInt32,pDisTrans);
ISymbol.Draw(pCenterPt);
ISymbol.ResetDC();
 
//绘制完成后 是否绘图对象 
graph.ReleaseHdc(hdc);
graph.Dispose();
复制代码

Symbol的第二种方法

IStyleGalleryItem item=new ServerStyleGalleryItemClass();

item.Item=youSymbol;//你需要预览的ISymbol

stdole.IPictureDisp pic=axSymbologyControl1.GetStyleClass(esriSymbologyStyleClass).PriviewItem(item,100,100);

Image img=Image.FormHbitmap(new IntPtr(pic.Handle));

picPriview.Image=img;

 

3.2 绘制Element 在Panel控件上

其中 graph、pCenterPoint、pDisTrans 的设置方式和上面一样

以绘制线段为例:

IDisplay pDisplay=new SimpleDisplay();

pDisplay.StartDrawing(graph.GetHdc(),ToInt32(),(short)esriScreeCache.esriNoScreeCache);

pDisplay.DisplayTransformation=pDisTrans;

pDisplay.SetSymbol(LineSymbol);//设置绘制线段的符号

pDisplay.DrawPolyline(IGeometry) ;//设置绘制线段的几何数据

 

//在arcgis帮助中找吧

 

 

参考文章

ArcGIS Engine 线段绘制研究

ArcEngine画shapefile点,线,面

ArcEngine中画shape点的另一种方法

Arcengine 绘制Element、Symbol 在控件上

 

 

 

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    本文转自wenglabs博客园博客,原文链接:http://www.cnblogs.com/arxive/p/8145435.html,如需转载请自行联系原作者


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