How to work with the snap environment
How to work with the snap environment |
In this topic
Working with the snap environment
[C#]
publicvoid SnapEnvirSettings(IEngineEditor editor)
{
//Get the snap environment from the editor.
IEngineSnapEnvironment snapEnvironment = editor as IEngineSnapEnvironment; //Ensure there is a snap agent turned on in the snap environment.if (snapEnvironment.SnapAgentCount == 0)
{
System.Windows.Forms.MessageBox.Show(
"You need to turn on at least one snapping agent!!!");
return ;
} //Code to display the snap tolerance in a message box. double tolerance = snapEnvironment.SnapTolerance;
System.Windows.Forms.MessageBox.Show(Convert.ToString(tolerance)); //Set the snap tolerance.
snapEnvironment.SnapToleranceUnits =
esriEngineSnapToleranceUnits.esriEngineSnapToleranceMapUnits;
snapEnvironment.SnapTolerance = 15; //Turn on snap tips.
((IEngineEditProperties2)editor).SnapTips = true;
}
[VB.NET]
PublicSub SnapEnvirSettings(ByVal editor As IEngineEditor)
'Get the snap environment from the editor.Dim snapEnvironment As IEngineSnapEnvironment = editor As IEngineSnapEnvironment 'Ensure there is a snap agent turned on in the snap environment.If snapEnvironment.SnapAgentCount = 0 Then
System.Windows.Forms.MessageBox.Show("You need to turn on at least one snapping agent!!!")
ReturnEndIf'Code to display the snap tolerance in a message box.Dim tolerance AsDouble = snapEnvironment.SnapTolerance
System.Windows.Forms.MessageBox.Show(Convert.ToString(tolerance)) 'Set the snap tolerance.
snapEnvironment.SnapToleranceUnits = esriEngineSnapToleranceUnits.esriEngineSnapToleranceMapUnits
snapEnvironment.SnapTolerance = 15 'Turn on snap tips.
((IEngineEditProperties2)editor).SnapTips = TrueEndSub
[C#]
privatebool CheckIsAnySnapAgentSelected(IEngineSnapEnvironment snapEnvironment)
{
int snapAgentCount = snapEnvironment.SnapAgentCount;
int checkedFeatureSnapAgentCount = 0;
int featureSnapAgentCount = 0; //Loop through all registered snap agents in the snap environment. Count feature snap agents,//checked feature snap agents, and nonfeature snap agents.for (int i = 0; i < snapAgentCount; i++)
{
IEngineSnapAgent currentSnapAgent = snapEnvironment.get_SnapAgent(i);
if (currentSnapAgent is IEngineFeatureSnapAgent)
{
IEngineFeatureSnapAgent featureSnapAgent = currentSnapAgent as
IEngineFeatureSnapAgent;
featureSnapAgentCount++; //Determine if the feature snap agent is checked.if (featureSnapAgent.HitType !=
esriGeometryHitPartType.esriGeometryPartNone)
{
checkedFeatureSnapAgentCount++;
}
}
}
if (checkedFeatureSnapAgentCount > 0 || snapAgentCount > featureSnapAgentCount)
{
returntrue;
}
else
{
returnfalse;
}
}
[VB.NET]
PrivateFunction CheckIsAnySnapAgentSelected(ByVal snapEnvironment As IEngineSnapEnvironment) AsBooleanDim snapAgentCount AsInteger = snapEnvironment.SnapAgentCount
Dim checkedFeatureSnapAgentCount AsInteger = 0
Dim featureSnapAgentCount AsInteger = 0 'Loop through all registered snap agents in the snap environment. Count feature snap agents,'checked feature snap agents, and nonfeature snap agents.Dim i AsIntegerFor i = 0 To snapAgentCount - 1 Step i + 1
Dim currentSnapAgent As IEngineSnapAgent = snapEnvironment.get_SnapAgent(i)
IfTypeOf currentSnapAgent Is IEngineFeatureSnapAgent ThenDim featureSnapAgent As IEngineFeatureSnapAgent = currentSnapAgent As IEngineFeatureSnapAgent
featureSnapAgentCount = featureSnapAgentCount + 1 'Determine if the feature snap agent is checked.If featureSnapAgent.HitType <> esriGeomeTryHitPartType.esriGeomeTryPartNone Then
checkedFeatureSnapAgentCount = checkedFeatureSnapAgentCount + 1
EndIfEndIfNextIf checkedFeatureSnapAgentCount > 0 Or snapAgentCount > featureSnapAgentCount ThenReturnTrueElseReturnFalseEndIfEndFunction
Snap agents
[C#]
publicvoid AddNewSnapAgent()
{
IEngineEditor editor = new EngineEditorClass();
IEngineEditLayers editLayers = editor as IEngineEditLayers;
IEngineSnapEnvironment snapEnvironment = editor as IEngineSnapEnvironment; //Check that the user is editing; otherwise, there will be no snap agent loaded.if (editLayers.TargetLayer == null)
{
System.Windows.Forms.MessageBox.Show("Please start an edit session");
return ;
} //Clear all existing snap agents.
snapEnvironment.ClearSnapAgents(); //Create a feature snap agent.
IEngineFeatureSnapAgent featureSnapAgent = new EngineFeatureSnap();
IFeatureClass layerFeatureClass = editLayers.TargetLayer.FeatureClass;
featureSnapAgent.FeatureClass = layerFeatureClass;
featureSnapAgent.HitType = esriGeometryHitPartType.esriGeometryPartBoundary; //Activate only the snap agent for the target layer.
snapEnvironment.AddSnapAgent(featureSnapAgent);
}
[VB.NET]
PublicSub AddNewSnapAgent()
Dim editor As IEngineEditor = New EngineEditorClass()
Dim editLayers As IEngineEditLayers = editor As IEngineEditLayers
Dim snapEnvironment As IEngineSnapEnvironment = editor As IEngineSnapEnvironment 'Check that the user is editing; otherwise, there will be no snap agent loaded.If editLayers.TargetLayer IsNothingThen
System.Windows.Forms.MessageBox.Show("Please start an edit session")
ReturnEndIf'Clear all existing snap agents.
snapEnvironment.ClearSnapAgents() 'Create a feature snap agent.Dim featureSnapAgent As IEngineFeatureSnapAgent = New EngineFeatureSnap()
Dim layerFeatureClass As IFeatureClass = editLayers.TargetLayer.FeatureClass
featureSnapAgent.FeatureClass = layerFeatureClass
featureSnapAgent.HitType = esriGeomeTryHitPartType.esriGeomeTryPartBoundary 'Activate only the snap agent for the target layer.
snapEnvironment.AddSnapAgent(featureSnapAgent)
EndSub
Snapping in z-dimension
Snap point method
See Also:
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