Overlay Methods

The following methods offer control over overlays.

Note: Many of the methods in this section use a pos% argument to refer to the position of an overlay in the overlays list. The overlays list is a zero-based list, i.e. the first overlay is at position 0, the second at position 1 etc. This must always be borne in mind when specifying the pos% argument.

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CopyOverlay	Copies an existing overlay into a new overlay.
CreateBackdropOverlay	Creates a new overlay that uses a named item as a backdrop.
CreateProcessOverlay	Creates a new overlay using a process.
CreateQueryOverlay	Creates a new overlay using a SQL statement.
CreateDataSourceOverlay	Inserts a dataset into the current SWD, that will fetch data from non-file data source.
CreateDbBlobOverlay	Creates an overlay that views BLOBs stored in a database.
CreateDbOverlay	Creates an overlay that stores editable BLOBs in a database.
CreateDbPointOverlay	Creates an overlay that views Points stored in a database.
CreateDbTableOverlay	Creates a new Attribute Table overlay, i.e. a read-only view of a database table that has no geometry.
CreateFilteredOverlay	Creates a new filtered copy of an existing overlay.
CreateIndexCoverage	Creates tile items covering extents using a standard naming convention.
CreateIndexOverlay	Creates an index overlay.
CreateInternalOverlay	Creates an internal overlay.
CreateOpenGisSqlOverlay	Creates an overlay using an OGC conformant database.
CreatePhaseOverlay	Creates a new phase of an existing overlay.
DefineRecordset	Defines a named recordset for use with databases.
EnsureOpenWithin	Forces datasets in the current SWD to open any items within the given extents at the given scale.
ExplodeOverlayTheme	Explodes an overlay theme into a new overlay.
FindDatasetOverlay	Finds an overlay that contains the given dataset.
GetOverlayFilter	Gets a copy of an overlay drawing filter.
GetOverlayLocus	Gets a copy of an overlay drawing spatial filter.
GetOverlaySchema	Gets a copy of an overlay schema.
GetOverlayTheme	Gets a copy of an overlay theme.
GetOverlayThemeLegend	Gets an overlay theme legend as a BLOB string within a coordinate reference system.
ImportDataset	Imports a dataset into the current SWD.
InsertDataset	Inserts a dataset into the current SWD.
InsertOverlayTheme	Inserts a copy of a named theme into an overlay in the current SWD.
IsOverlayThemeEnabled	Checks whether an Overlay theme is currently enabled or disabled.
RemoveOverlay	Removes an overlay from the current SWD deleting it if it is an internal overlay.
RemoveOverlayTheme	Removes a theme from an overlay in the current SWD.
ReorderOverlay	Changes the order of overlays.
SetOverlayDataset	Sets the Dataset of an overlay in the current swd.
SetOverlayFilter	Applies a copy of a named filter to an overlay in the current SWD.
SetOverlayLocus	Applies a copy of a named spatial filter to an overlay in the current SWD.
SetOverlaySchema	Applies a copy of a schema to an overlay in the current SWD.
ShowUI	Applies a copy of a schema to an overlay in the current SWD.

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