/// <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();
}
private void reverseAgentsPriority_Click(object sender, EventArgs e)
{
//get all the snap agents in reverse order and then deactivate them
ArrayList snapAgentList = new ArrayList();
for (int i = snapEnvironment.SnapAgentCount - 1; i >= 0; i--)
{
IEngineSnapAgent tmpAgent = snapEnvironment.get_SnapAgent(i);
snapAgentList.Add(tmpAgent);
snapEnvironment.RemoveSnapAgent(i);
}
//add the agents back to the environment
foreach (IEngineSnapAgent agent in snapAgentList)
{
snapEnvironment.AddSnapAgent(agent);
}
//refresh this window
RefreshDisplay();
}
/// <summary>
/// Adds, and hence turns on, Edit Sketch snap agents
/// </summary>
private void AddSketchSnapAgents()
{
//give anchor snap (i.e. vertex snap) priority to get more accurate snap tips while snapped to a vertex
Type t = Type.GetTypeFromProgID("esriControls.EngineAnchorSnap");
System.Object obj = Activator.CreateInstance(t);
IEngineSnapAgent snapAgent = (IEngineSnapAgent)obj;
snapEnvironment.AddSnapAgent(snapAgent);
//edge sketch edges
t = Type.GetTypeFromProgID("esriControls.EngineSketchSnap");
obj = Activator.CreateInstance(t);
snapAgent = (IEngineSnapAgent)obj;
snapEnvironment.AddSnapAgent(snapAgent);
//perpendicular to edit sketch
t = Type.GetTypeFromProgID("esriControls.EnginePerpendicularSnap");
obj = Activator.CreateInstance(t);
snapAgent = (IEngineSnapAgent)obj;
snapEnvironment.AddSnapAgent(snapAgent);
}
public void AddSnapAgent(IEngineSnapAgent iengineSnapAgent_0)
{
this.iarray_0.Add(iengineSnapAgent_0);
}
public bool SnapPoint(IPoint ipoint_0, IPoint ipoint_1)
{
bool result;
if (!this.bool_0)
{
result = false;
}
else
{
double num = this.double_0;
if (this._appContext != null &&
this.esriEngineSnapToleranceUnits_0 == esriEngineSnapToleranceUnits.esriEngineSnapTolerancePixels)
{
num = this.method_0(this._appContext.MapControl.Map as IActiveView, this.double_0);
if (num == 0.0)
{
num = this.double_0;
}
}
System.Collections.Hashtable hashtable = new System.Collections.Hashtable();
for (int i = 0; i < this.iarray_0.Count; i++)
{
IEngineSnapAgent engineSnapAgent = (IEngineSnapAgent)this.iarray_0.get_Element(i);
IFeatureCache featureCache = null;
if (engineSnapAgent is IFeatureSnapAgent)
{
IFeatureClass featureClass = (engineSnapAgent as IFeatureSnapAgent).FeatureClass;
try
{
featureCache = (hashtable[featureClass] as IFeatureCache);
goto IL_10F;
}
catch
{
goto IL_10F;
}
goto IL_C6;
IL_E9:
(engineSnapAgent as IFeatureSnapAgent).FeatureCache = featureCache;
goto IL_F7;
IL_10F:
if (featureCache != null)
{
goto IL_E9;
}
IL_C6:
featureCache = new FeatureCache();
featureCache.Initialize(ipoint_1, num);
featureCache.AddFeatures(featureClass);
hashtable.Add(featureClass, featureCache);
goto IL_E9;
}
IL_F7:
if (engineSnapAgent.Snap(ipoint_0, ipoint_1, num))
{
result = true;
return(result);
}
}
hashtable.Clear();
result = false;
}
return(result);
}
