void m_editEvents_OnDeleteFeature(IObject obj)
{
// check if the deleted feature participates in a relation
// applies to point, lines, and polygons
// if it does participate in a relation ask the user if it is ok to delete
IFeatureClass currentObjectFeatureClass = obj.Class as IFeatureClass;
if ((currentObjectFeatureClass == null) || (currentObjectFeatureClass.EXTCLSID == null))
{
return;
}
// check if the current feature class being edited is acutally an OpenStreetMap feature class
// all other feature class should not be touched by this extension
UID osmEditorExtensionCLSID = currentObjectFeatureClass.EXTCLSID;
if (osmEditorExtensionCLSID.Value.ToString().Equals("{65CA4847-8661-45eb-8E1E-B2985CA17C78}", StringComparison.InvariantCultureIgnoreCase) == false)
{
return;
}
// at this point we are only handling geometry types
// relation types are using a separate UI
IFeature deletedFeature = obj as IFeature;
if (deletedFeature == null)
{
return;
}
// block changing features that are supporting features for multi-part geometries (relations)
if (deletedFeature.Shape is IPolygon || deletedFeature.Shape is IPolyline)
{
int memberOFFieldIndex = deletedFeature.Fields.FindField("osmMemberOf");
int membersFieldIndex = deletedFeature.Fields.FindField("osmMembers");
int osmIDFieldIndex = deletedFeature.Fields.FindField("OSMID");
int osmID = 0;
if (osmIDFieldIndex > -1)
{
object osmIDValue = deletedFeature.get_Value(osmIDFieldIndex);
if (osmIDValue != DBNull.Value)
{
osmID = Convert.ToInt32(osmIDValue);
}
}
if (membersFieldIndex > -1)
{
ESRI.ArcGIS.OSM.OSMClassExtension.member[] relationMembers = _osmUtility.retrieveMembers(deletedFeature, membersFieldIndex);
if (relationMembers != null)
{
if (relationMembers.Length > 0)
{
string abortMessage = String.Format(resourceManager.GetString("OSMEditor_FeatureInspector_multipartdeleteparentconflictmessage"), osmID);
MessageBox.Show(abortMessage, resourceManager.GetString("OSMEditor_FeatureInspector_relationconflictcaption"), MessageBoxButtons.OK, MessageBoxIcon.Stop);
m_editor3.AbortOperation();
}
}
}
if (memberOFFieldIndex > -1)
{
List <string> isMemberOfList = _osmUtility.retrieveIsMemberOf(deletedFeature, memberOFFieldIndex);
Dictionary <string, string> dictofParentsAndTypes = _osmUtility.parseIsMemberOfList(isMemberOfList);
StringBuilder typeAndIDString = new StringBuilder();
foreach (var item in dictofParentsAndTypes)
{
switch (item.Value)
{
case "rel":
typeAndIDString.Append(resourceManager.GetString("OSMEditor_FeatureInspector_relationidtext") + item.Key + ",");
break;
case "ply":
typeAndIDString.Append(resourceManager.GetString("OSMEditor_FeatureInspector_polygonidtext") + item.Key + ",");
break;
case "ln":
typeAndIDString.Append(resourceManager.GetString("OSMEditor_FeatureInspector_polylineidtext") + item.Key + ",");
break;
case "pt":
typeAndIDString.Append(resourceManager.GetString("OSMEditor_FeatureInspector_pointidtext") + item.Key + ",");
break;
default:
break;
}
}
if (typeAndIDString.Length > 0)
{
string parentsString = typeAndIDString.ToString(0, typeAndIDString.Length - 1);
string abortMessage = String.Format(resourceManager.GetString("OSMEditor_FeatureInspector_relationsconflictmessage"), osmID, parentsString);
MessageBox.Show(abortMessage, resourceManager.GetString("OSMEditor_FeatureInspector_relationconflictcaption"), MessageBoxButtons.OK, MessageBoxIcon.Stop);
m_editor3.AbortOperation();
return;
}
}
}
else if (deletedFeature.Shape is IPoint)
{
// if we are dealing with points to be deleted then we'll determine the connectedness via a spatial query and then the attributes indicating that
// the higher order feature is part of a relation
IFeatureClass lineFeatureClass = ESRI.ArcGIS.OSM.OSMClassExtension.OpenStreetMapClassExtension.findMatchingFeatureClass(deletedFeature, esriGeometryType.esriGeometryPolyline);
ISpatialFilter searchPointFilter = new SpatialFilterClass();
searchPointFilter.Geometry = deletedFeature.Shape;
searchPointFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelTouches;
TestRelationMembership(deletedFeature, lineFeatureClass, searchPointFilter);
IFeatureClass polygonFeatureClass = ESRI.ArcGIS.OSM.OSMClassExtension.OpenStreetMapClassExtension.findMatchingFeatureClass(deletedFeature, esriGeometryType.esriGeometryPolygon);
TestRelationMembership(deletedFeature, polygonFeatureClass, searchPointFilter);
}
string featureClassName = ((IDataset)obj.Class).Name;
// find the correspoding relation table
int baseIndex = featureClassName.IndexOf("_osm_");
int deleteOSMIDFieldIndex = obj.Fields.FindField("OSMID");
int deleteIsMemberOfFieldIndex = obj.Fields.FindField("osmMemberOf");
if (baseIndex > -1)
{
string relationTableName = featureClassName.Substring(0, baseIndex) + "_osm_relation";
IFeatureWorkspace featureWorkspace = m_editor3.EditWorkspace as IFeatureWorkspace;
ITable relationTable = featureWorkspace.OpenTable(relationTableName);
int relationOSMIDFieldIndex = relationTable.Fields.FindField("OSMID");
List <string> memberOfList = _osmUtility.retrieveIsMemberOf(deletedFeature, deleteIsMemberOfFieldIndex);
Dictionary <string, string> isMemberOfIdsAndTypes = _osmUtility.parseIsMemberOfList(memberOfList);
if (memberOfList.Count > 0)
{
// the deleted feature is referenced by a relation
// check with the user if it is ok to delete
// if OK then we are dealing with the delete upon stop editing, if cancel undo the delete
string relationsString = String.Empty;
int relationCount = 0;
foreach (var memberOfItem in isMemberOfIdsAndTypes)
{
if (memberOfItem.Value == "rel")
{
relationCount = relationCount + 1;
relationsString = relationsString + memberOfItem.Key + ",";
}
}
string errorMessage = String.Empty;
if (relationCount > 1)
{
errorMessage = string.Format(resourceManager.GetString("OSMEditor_FeatureInspector_relationsconflictmessage"), deletedFeature.get_Value(deleteOSMIDFieldIndex), relationsString.Substring(0, relationsString.Length - 1));
}
else
{
errorMessage = string.Format(resourceManager.GetString("OSMEditor_FeatureInspector_relationconflictmessage"), deletedFeature.get_Value(deleteOSMIDFieldIndex), relationsString.Substring(0, relationsString.Length - 1));
}
if (MessageBox.Show(errorMessage, resourceManager.GetString("OSMEditor_FeatureInspector_relationconflictcaption"), MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.Cancel)
{
m_editor3.AbortOperation();
}
}
}
}
