//判断鼠标是否在已选择要素的节点上
public static bool MouseOnFeatureVertex(IPoint pPnt, IFeature pFeature, IActiveView pActiveView)
{
//设置点选择容差
ISelectionEnvironment pSelectEnv = new SelectionEnvironmentClass();
double Length = ConvertPixelsToMapUnits(pActiveView, pSelectEnv.SearchTolerance);
IPointCollection pointCol = pFeature.Shape as IPointCollection;
for (int i = 0; i < pointCol.PointCount; i++)
{
IGeometry4 pGeom = pointCol.get_Point(i) as IGeometry4;
//给pGeom一个确定的空间参考
pGeom.Project(pActiveView.FocusMap.SpatialReference);
if (pGeom.IsEmpty)
{
return(false);
}
IProximityOperator pObj = pGeom as IProximityOperator;
double dblDist = pObj.ReturnDistance(pPnt);
if (dblDist < Length)
{
return(true);
}
}
return(false);
}
private static bool MouseOnSelection(IFeatureLayer pFeatureLay, IPoint pPnt, IActiveView pActiveView, double Length)
{
IFeatureSelection pFeatureSelection = pFeatureLay as IFeatureSelection;
if (pFeatureSelection == null)
{
return(false);
}
ISelectionSet pSelectionSet = pFeatureSelection.SelectionSet;
if (pSelectionSet.Count == 0)
{
return(false);
}
ICursor pCursor = null;
pSelectionSet.Search(null, false, out pCursor);
IFeatureCursor pFeatureCursor = pCursor as IFeatureCursor;
if (pFeatureCursor == null)
{
return(false);
}
IFeature pFeature = pFeatureCursor.NextFeature();
while (pFeature != null)
{
IGeometry4 pGeom = pFeature.ShapeCopy as IGeometry4;
//给pGeom一个确定的空间参考
pGeom.Project(pActiveView.FocusMap.SpatialReference);
if (pGeom.IsEmpty)
{
continue;
}
IProximityOperator pObj = pGeom as IProximityOperator;
double dblDist = pObj.ReturnDistance(pPnt);
if (dblDist < Length)
{
return(true);
}
pFeature = pFeatureCursor.NextFeature();
}
return(false);
}