public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
if (m_hookHelper != null)
{
IPoint pPt;
IActiveView pActiveView;
ClsDeclare.g_strUnit = ClsDeclare.g_UnitConverter.CurrentUnitName;
pActiveView = m_hookHelper.ActiveView;
pPt = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
//得到最近地物
Collection pFeatures = null;
IFeature pFeature = null;
ClsSearch.PfgisGetClosestFeature(m_Map, pPt, ref pFeatures, ref pFeature);
if (pFeature == null)
{
return;
}
if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
{
ClsSearch.FlashFeature(pActiveView, pFeature);
IPolygon pPolygon;
pPolygon = (IPolygon)pFeature.ShapeCopy;
IArea pArea;
if (ClsDeclare.g_strUnit == "度")
{
ClsDeclare.g_UnitConverter.SetCurrentMapUnit(ClsDeclare.g_UnitConverter.DefaultMapUnit);
ClsDeclare.g_strUnit = ClsDeclare.g_UnitConverter.CurrentUnitName;
}
pArea = ClsDeclare.g_UnitConverter.ConvertGeometryCoordinate(pPolygon) as IArea;
m_dArea = pArea.Area;
m_dArea = Convert.ToDouble(string.Format("{0:#######0.00}", m_dArea));
ClsDeclare.g_txtMeasure.Clear();
ClsDeclare.g_txtMeasure.Text = "面要素量算" + "\r" + "\n" + "要素面积：" + Math.Abs(m_dArea) + "平方" + ClsDeclare.g_strUnit + "\r" + "\n" + "要素长度：" + string.Format("{0:#######0.00}", ClsDeclare.g_UnitConverter.ConvertPolyonCoordinate(pPolygon).Length) + ClsDeclare.g_strUnit;
}
else if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline)
{
ClsSearch.FlashFeature(pActiveView, pFeature);
IPolyline pPolyline;
pPolyline = ClsDeclare.g_UnitConverter.ConvertGeometryCoordinate(pFeature.ShapeCopy) as IPolyline;
ClsDeclare.g_txtMeasure.Clear();
ClsDeclare.g_txtMeasure.Text = "线要素量算" + "\r" + "\n" + "要素长度：" + string.Format("{0:#######0.00}", pPolyline.Length) + ClsDeclare.g_strUnit;
}
else if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPoint)
{
ClsSearch.FlashFeature(pActiveView, pFeature);
IPoint pPointFeature;
pPointFeature = ClsDeclare.g_UnitConverter.ConvertGeometryCoordinate(pFeature.ShapeCopy) as IPoint;
ClsDeclare.g_txtMeasure.Clear();
ClsDeclare.g_txtMeasure.Text = "点要素" + "\r" + "\n" + "X: " + pPointFeature.X + ClsDeclare.g_strUnit + "\r" + "\n" + "Y: " + pPointFeature.Y + ClsDeclare.g_strUnit;
}
}
else if (m_sceneHookHelper != null)
{
}
else if (m_globeHookHelper != null)
{
}
}
public static void PfgisGetClosestFeature(IMap pMap, IPoint pSearchPt, ref Collection pSelected, ref IFeature pFeatureClosest)
{
ClsMapLayer pConvert = new ClsMapLayer();
//初始化返回值
pSelected = new Collection();
pFeatureClosest = null;
//设置搜索范围
IEnvelope pSrchEnv;
pSrchEnv = pSearchPt.Envelope;
double SearchDist;
SearchDist = 4d;
IActiveView pActiveView;
pActiveView = pMap as IActiveView;
SearchDist = ClsMapLayer.ConvertPixelsToMapUnits(pActiveView, SearchDist);
pSrchEnv.Width = SearchDist;
pSrchEnv.Height = SearchDist;
pSrchEnv.CenterAt(pSearchPt);
UIDClass pUID = new UIDClass();
pUID.Value = "{E156D7E5-22AF-11D3-9F99-00C04F6BC78E}";
IEnumLayer pLayers;
pLayers = pMap.get_Layers(pUID, true);
ILayer pLayer;
pLayer = pLayers.Next();
while (pLayer != null)
{
IGeoFeatureLayer pGeoLayer;
pGeoLayer = (IGeoFeatureLayer)pLayer;
if (pGeoLayer.Selectable && pGeoLayer.Visible && pGeoLayer.FeatureClass != null)
{
IIdentify2 pID;
pID = (IIdentify2)pGeoLayer;
//根据查询范围执行查询操作
IArray pArray;
pArray = pID.Identify(pSrchEnv, null);
IFeatureIdentifyObj pFeatIdObj;
IRowIdentifyObject pRowObj;
IFeature pFeature;
if (pArray != null)
{
for (int j = 0; j < pArray.Count; j++)
{
if (pArray.get_Element(j) is IFeatureIdentifyObj)
{
pFeatIdObj = pArray.get_Element(j) as IFeatureIdentifyObj;
pRowObj = pFeatIdObj as IRowIdentifyObject;
pFeature = pRowObj.Row as IFeature;
pSelected.Add(pFeature, null, null, null);
}
}
pArray.RemoveAll();
}
}
pLayer = pLayers.Next();
}
ClsSearch.PfgisGetClosestFeatureInCollection(SearchDist, pSelected, pSearchPt, ref pFeatureClosest);
}