/// <summary>
/// Update the window with the current snap environment and snap tip settings
/// </summary>
private void RefreshDisplay()
{
snapTolerance.Text = snapEnvironment.SnapTolerance.ToString();
snapTolUnits.SelectedIndex = (int)snapEnvironment.SnapToleranceUnits;
snapTips.Checked = ((IEngineEditProperties2)editor).SnapTips;
//remove all feature snap agents from the data grid view
snapAgents.Rows.Clear();
//display feature snap and snap agents that are active
for (int i = 0; i < snapEnvironment.SnapAgentCount; i++)
{
try
{
IEngineSnapAgent snapAgent = snapEnvironment.get_SnapAgent(i);
IEngineFeatureSnapAgent ftrSnapAgent = snapAgent as IEngineFeatureSnapAgent;
if (ftrSnapAgent != null)
{
//for feature snap agents add a row to the data view grid
esriGeometryHitPartType hitType = ftrSnapAgent.HitType;
bool vertex, edge, end;
vertex = (hitType & esriGeometryHitPartType.esriGeometryPartVertex) == esriGeometryHitPartType.esriGeometryPartVertex;
edge = (hitType & esriGeometryHitPartType.esriGeometryPartBoundary) == esriGeometryHitPartType.esriGeometryPartBoundary;
end = (hitType & esriGeometryHitPartType.esriGeometryPartEndpoint) == esriGeometryHitPartType.esriGeometryPartEndpoint;
string vertexString = vertex ? "vertex" : " ";
string edgeString = edge ? " edge" : " ";
string endString = end ? " end " : " ";
string hitTypes = vertexString + edgeString + endString;
object[] rowData = { snapAgent.Name.ToString(), ftrSnapAgent.FeatureClass.AliasName, hitTypes };
snapAgents.Rows.Add(rowData);
}
else
{
//add the active edit sketch snap agents
object[] rowData = { snapAgent.Name.ToString(), "<not applicable>", "<not applicable>" };
snapAgents.Rows.Add(rowData);
}
}
catch (Exception)
{
}
}
}
/// <summary>
/// Turns off feature snap agents and turns off edit sketch snap agents by removing them
/// </summary>
/// <remarks>
/// Using Clear or Remove feature snap agents can be deactivated so that the user can't enable them.
/// Here we simply turn off all the agents, which will allow the user to turn them on.
/// </remarks>
private void TurnOffAgents()
{
for (int i = snapEnvironment.SnapAgentCount - 1; i >= 0; i--)
{
IEngineSnapAgent snapAgent = snapEnvironment.get_SnapAgent(i);
IEngineFeatureSnapAgent ftrSnapAgent = snapAgent as IEngineFeatureSnapAgent;
if (ftrSnapAgent != null)
{
//turn off the feature snap agent
ftrSnapAgent.HitType = esriGeometryHitPartType.esriGeometryPartNone;
}
else
{
//there is no way to turn snap agents off, they must be removed
snapEnvironment.RemoveSnapAgent(i);
}
}
//refresh this window
RefreshDisplay();
}
public void OnMouseDown(int button, int shift, int x, int y)
{
this._tool.OnMouseDown(button, shift, x, y);
IEngineSnapEnvironment engineEditor = Editor.UniqueInstance.EngineEditor as IEngineSnapEnvironment;
if (engineEditor.SnapAgentCount < 1)
{
Editor.UniqueInstance.OperationStack.Undo();
MessageBox.Show("没有设置捕捉图层！");
}
else
{
IFeatureLayer layer = EditTask.UnderLayers[0] as IFeatureLayer;
IFeatureClass featureClass = layer.FeatureClass;
IEngineFeatureSnapAgent agent = engineEditor.get_SnapAgent(0) as IEngineFeatureSnapAgent;
IDataset dataset = featureClass as IDataset;
IDataset dataset2 = agent.FeatureClass as IDataset;
if (!dataset.Name.Equals(dataset2.Name))
{
Editor.UniqueInstance.OperationStack.Undo();
MessageBox.Show("没有将征占点图层设置为捕捉图层！");
}
else
{
IEngineEditSketch sketch = Editor.UniqueInstance.EngineEditor as IEngineEditSketch;
int index = featureClass.FindField("XMBH");
IClone lastPoint = sketch.LastPoint as IClone;
IPoint point = lastPoint.Clone() as IPoint;
IGeoDataset dataset3 = featureClass as IGeoDataset;
if (point.SpatialReference.Name != dataset3.SpatialReference.Name)
{
point.Project(dataset3.SpatialReference);
}
IGeometry geometry = (point as ITopologicalOperator).Buffer(0.0002);
ISpatialFilter filter = new SpatialFilterClass {
Geometry = geometry,
SpatialRel = esriSpatialRelEnum.esriSpatialRelEnvelopeIntersects,
SubFields = "XMBH",
GeometryField = featureClass.ShapeFieldName
};
IFeatureCursor o = featureClass.Search(filter, false);
IFeature feature = o.NextFeature();
Marshal.ReleaseComObject(o);
o = null;
if (feature == null)
{
Editor.UniqueInstance.OperationStack.Undo();
MessageBox.Show("必须捕捉征占点！");
}
else if (!feature.HasOID || feature.Shape.IsEmpty)
{
Editor.UniqueInstance.OperationStack.Undo();
MessageBox.Show("捕捉的征占点没有OID或图形有问题！");
}
else
{
IPolyline polyline = sketch.Geometry as IPolyline;
if (this.ps == 0)
{
int num2;
int num3;
this._firstValue = feature.get_Value(index);
IPoint mapPoint = (feature.Shape as IClone).Clone() as IPoint;
mapPoint.Project(polyline.SpatialReference);
this._hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.FromMapPoint(mapPoint, out num2, out num3);
polyline.FromPoint = mapPoint;
polyline.ToPoint = mapPoint;
}
else if (this.ps >= 1)
{
object obj2 = feature.get_Value(index);
if (!this._firstValue.Equals(obj2))
{
Editor.UniqueInstance.OperationStack.Undo();
MessageBox.Show("必须捕捉项目编号相同的征占点！");
return;
}
IPoint point3 = (feature.Shape as IClone).Clone() as IPoint;
point3.Project(polyline.SpatialReference);
polyline.ToPoint = point3;
}
sketch.Geometry = polyline;
this.ps++;
}
}
}
}
private void SnapPoint()
{
IEngineSnapEnvironment engineEditor = Editor.UniqueInstance.EngineEditor as IEngineSnapEnvironment;
IEngineEditSketch sketch = Editor.UniqueInstance.EngineEditor as IEngineEditSketch;
IPointCollection points = sketch.Geometry as IPointCollection;
bool flag = false;
if (sketch.GeometryType == esriGeometryType.esriGeometryPolygon)
{
flag = true;
}
if ((points.PointCount != 1) && (!flag || (points.PointCount != 2)))
{
IEngineFeatureSnapAgent agent2 = engineEditor.get_SnapAgent(0) as IEngineFeatureSnapAgent;
esriSpatialRelEnum esriSpatialRelIntersects = esriSpatialRelEnum.esriSpatialRelIntersects;
if (agent2.FeatureClass.ShapeType == esriGeometryType.esriGeometryPolygon)
{
esriSpatialRelIntersects = esriSpatialRelEnum.esriSpatialRelTouches;
}
IPoint lastPoint = sketch.LastPoint;
List <IFeature> pFeatures = new List <IFeature>();
ISpatialFilter filter = new SpatialFilterClass {
Geometry = lastPoint,
SpatialRel = esriSpatialRelIntersects,
SubFields = agent2.FeatureClass.OIDFieldName + "," + agent2.FeatureClass.ShapeFieldName,
GeometryField = agent2.FeatureClass.ShapeFieldName
};
IFeatureCursor o = agent2.FeatureClass.Search(filter, false);
IFeature item = o.NextFeature();
while (item != null)
{
if (item.HasOID && !item.Shape.IsEmpty)
{
pFeatures.Add(item);
item = o.NextFeature();
}
}
Marshal.ReleaseComObject(o);
if (pFeatures.Count >= 1)
{
IPoint queryPoint = null;
if (flag)
{
queryPoint = points.get_Point(points.PointCount - 3);
}
else
{
queryPoint = points.get_Point(points.PointCount - 2);
}
List <IFeature> list2 = new List <IFeature>();
filter = new SpatialFilterClass {
Geometry = queryPoint,
SpatialRel = esriSpatialRelIntersects,
SubFields = agent2.FeatureClass.OIDFieldName + "," + agent2.FeatureClass.ShapeFieldName,
GeometryField = agent2.FeatureClass.ShapeFieldName
};
o = null;
o = agent2.FeatureClass.Search(filter, false);
item = o.NextFeature();
while (item != null)
{
if (item.HasOID && !item.Shape.IsEmpty)
{
list2.Add(item);
item = o.NextFeature();
}
}
Marshal.ReleaseComObject(o);
if (list2.Count >= 1)
{
IList <IFeature> list3 = new List <IFeature>();
for (int i = 0; i < list2.Count; i++)
{
if (this.ContainFeature(pFeatures, list2[i]))
{
list3.Add(list2[i]);
}
}
IFeature feature2 = null;
if (list3.Count == 1)
{
feature2 = list3[0];
}
else
{
if (list3.Count == 0)
{
return;
}
if (list3.Count == pFeatures.Count)
{
IFeatureLayer pLayer = Editor.UniqueInstance.SnapLayers[0];
SnapExFeatures features = new SnapExFeatures(pFeatures, this._hookHelper, pLayer);
features.ShowDialog();
if (features.Index == -1)
{
return;
}
feature2 = pFeatures[features.Index];
features = null;
}
}
double hitDistance = -1.0;
int hitSegmentIndex = -1;
int hitPartIndex = -1;
bool bRightSide = false;
IGeometry geometry = this.ProjectGeometry(feature2.Shape);
IHitTest test = geometry as IHitTest;
if (test.HitTest(lastPoint, engineEditor.SnapTolerance, esriGeometryHitPartType.esriGeometryPartVertex, null, ref hitDistance, ref hitPartIndex, ref hitSegmentIndex, ref bRightSide))
{
int num5 = -1;
double num6 = -1.0;
int num7 = -1;
int num8 = -1;
bool flag4 = false;
int part = sketch.Part;
IHitTest test2 = geometry as IHitTest;
if (test2.HitTest(queryPoint, engineEditor.SnapTolerance, esriGeometryHitPartType.esriGeometryPartVertex, null, ref num6, ref num8, ref num7, ref flag4))
{
IPolyline polyline3;
if (flag)
{
num5 = points.PointCount - 2;
}
else
{
num5 = points.PointCount - 1;
}
IGeometryCollection geometrys = geometry as IGeometryCollection;
IPointCollection points2 = geometrys.get_Geometry(hitPartIndex) as IPointCollection;
IPolyline polyline = new PolylineClass();
IPolyline polyline2 = new PolylineClass();
IPointCollection points3 = polyline as IPointCollection;
IPointCollection points4 = polyline2 as IPointCollection;
object before = Missing.Value;
object after = Missing.Value;
IPoint inPoint = null;
bool flag6 = false;
if (num7 > hitSegmentIndex)
{
int num9 = hitSegmentIndex;
hitSegmentIndex = num7;
num7 = num9;
flag6 = true;
}
int num10 = 0;
if (flag)
{
for (num10 = num7; num10 <= hitSegmentIndex; num10++)
{
inPoint = points2.get_Point(num10);
points3.AddPoint(inPoint, ref before, ref after);
}
int num11 = points2.PointCount - 1;
for (num10 = hitSegmentIndex; num10 < num11; num10++)
{
inPoint = points2.get_Point(num10);
points4.AddPoint(inPoint, ref before, ref after);
}
for (num10 = 0; num10 <= num7; num10++)
{
inPoint = points2.get_Point(num10);
points4.AddPoint(inPoint, ref before, ref after);
}
if (polyline.Length <= polyline2.Length)
{
polyline3 = polyline;
}
else
{
polyline3 = polyline2;
flag6 = true;
}
}
else
{
num10 = num7;
while (num10 <= hitSegmentIndex)
{
inPoint = points2.get_Point(num10);
points3.AddPoint(inPoint, ref before, ref after);
num10++;
}
polyline3 = polyline;
}
IPointCollection points5 = polyline3 as IPointCollection;
int index = num5;
if (flag6)
{
for (num10 = points5.PointCount - 2; num10 > 0; num10--)
{
IPoint newPoints = (points5.get_Point(num10) as IClone).Clone() as IPoint;
points.InsertPoints(index, 1, ref newPoints);
index++;
}
}
else
{
for (num10 = 1; num10 < (points5.PointCount - 1); num10++)
{
IPoint point7 = (points5.get_Point(num10) as IClone).Clone() as IPoint;
points.InsertPoints(index, 1, ref point7);
index++;
}
}
}
}
}
}
}
}
private void GetSnapInfo(ref LayerSnapInfo LSInfo)
{
int num;
int geometryHitType;
IFeatureClass featureClass = LSInfo.Layer.FeatureClass;
if (this.m_pSnapEnvironment != null)
{
IFeatureSnapAgent agent = null;
for (num = 0; num < this.m_pSnapEnvironment.SnapAgentCount; num++)
{
agent = this.m_pSnapEnvironment.get_SnapAgent(num) as IFeatureSnapAgent;
if ((agent != null) && (featureClass == agent.FeatureClass))
{
if (agent is IVerticalSnapAgent)
{
LSInfo.bVerticalSnap = true;
}
else
{
geometryHitType = agent.GeometryHitType;
if ((geometryHitType & 4) != 0)
{
LSInfo.bSnapBoundary = true;
}
if ((geometryHitType & 32) != 0)
{
}
if ((geometryHitType & 16) != 0)
{
LSInfo.bSnapEndPoint = true;
}
if ((geometryHitType & 8) != 0)
{
}
if ((geometryHitType & 1) != 0)
{
LSInfo.bSnapVertex = true;
}
}
}
}
}
else
{
IEngineFeatureSnapAgent agent2 = null;
for (num = 0; num < this.m_pEngineSnapEnvironment.SnapAgentCount; num++)
{
agent2 = this.m_pEngineSnapEnvironment.get_SnapAgent(num) as IEngineFeatureSnapAgent;
if ((agent2 != null) && (featureClass == agent2.FeatureClass))
{
if (agent2 is IVerticalSnapAgent)
{
LSInfo.bVerticalSnap = true;
}
else
{
geometryHitType = (int)agent2.HitType;
if ((geometryHitType & 4) != 0)
{
LSInfo.bSnapBoundary = true;
}
if ((geometryHitType & 32) != 0)
{
}
if ((geometryHitType & 16) != 0)
{
LSInfo.bSnapEndPoint = true;
}
if ((geometryHitType & 8) != 0)
{
}
if ((geometryHitType & 1) != 0)
{
LSInfo.bSnapVertex = true;
}
}
}
}
}
}