Class TLayerOwnerCollection

Unit

OrderedCollectionUnit

Declaration

type TLayerOwnerCollection = class(TEnhancedOrderedCollection)

Description

TLayerOwnerCollection is a TEnhancedOrderedCollection that stores of list of TDataArrays that it can delete. The list (NewDataSets) is not created by the TLayerOwnerCollection. Instead another class creates it and assigns it to TLayerOwnerCollection. TUndoChangeLgrPackageSelection is an example of a class that assigns NewDataSets.

When a new TDataArray is created, it should be added to NewDataSets using AddOwnedDataArray; In DoCommand, ClearNewDataSets should be called before the TDataArrays are created. In Undo, RemoveNewDataSets should be called;

Hierarchy

• TCollection
• TOrderedCollection
• TEnhancedOrderedCollection
• TLayerOwnerCollection

Overview

Fields

FNewDataSets: TList;

Methods

	procedure AddOwnedDataArray(DataArray: TDataArray);
	procedure ClearNewDataSets;
	procedure RemoveNewDataSets;

Properties

property NewDataSets: TList read FNewDataSets write FNewDataSets;

Description

Fields

	FNewDataSets: TList;
See NewDataSets.

Methods

	procedure AddOwnedDataArray(DataArray: TDataArray);
AddOwnedDataArray adds DataArray to NewDataSets

	procedure ClearNewDataSets;
ClearNewDataSets clears NewDataSets.

	procedure RemoveNewDataSets;
RemoveNewDataSets frees all the TDataArrays in NewDataSets.

Properties

	property NewDataSets: TList read FNewDataSets write FNewDataSets;
NewDataSets is the list of TDataArrays managed by TLayerOwnerCollection. NewDataSets is NOT owned by TLayerOwnerCollection.