ICustomOperator.Prepare Method
Prepares the operator for an update cycle.
Prepare(ViewInfo info, IdCollection ids)
Prepares the operator for an update cycle.Syntax
public void Prepare (
ViewInfo info,
IdCollection ids
)Parameters
Holds information about the view, like the current scale.
A list of feature identifiers.
Remarks
Prepares the operator for an update cycle. This method is always called once during an update cycle, before the sequence of calls to Get.
Besides setting up the operator itself, this method is also responsible for calling Prepare on its input operator or operators. This is done by calling CustomOperatorContext.PrepareInput or CustomOperatorContext.PrepareAllInputs on the context supplied in InitNew.
The info parameter contains information about the view. Sometimes an operator needs to modify the information passed down to its inputs. A common case is that a larger geographic area is needed for the processing, this can be accomplished by increasing the size of the area the info object contains and passing it to the input operator(s) when calling CustomOperatorContext.PrepareInput or CustomOperatorContext.PrepareAllInputs.
The ids parameter contains the identities of the objects that came out of this operator in a previous update cycle. If the operator modifies the identities of the incoming objects or creates new objects, the operator is responsible for translating the identities. In most cases the identities are not modified and the operator can simply pass the list to CustomOperatorContext.PrepareInput or CustomOperatorContext.PrepareAllInputs.
Platforms
Windows, Linux, Android