IDLgrImage::TileDataLoaded
The IDLgrImage::TileDataLoaded function method tests whether a specified image tile has data loaded.
Syntax
Result = Obj->[IDLgrImage::]TileDataLoaded( TileInfo )
Return Value
Returns 1 (one) if the tile has data already loaded, or 0 (zero) otherwise.
Arguments
TileInfo
A named structure describing the tile to be queried. Only one tile at a time can be passed to TileDataLoaded. The structure contains the following fields:
Table 8-10: IDLIMAGETILE Structure
Table 8-10: IDLIMAGETILE Structure
|
Field
|
Data Type
|
Description
|
|
X
|
Long
|
The horizontal position of the left side of the tile(s) measured from the left of the image in pixels.
|
|
Y
|
Long
|
The vertical position of the bottom of the tile(s) measured from the bottom of the image in pixels.
|
|
WIDTH
|
Long
|
The width of the tile(s) in pixels.
|
|
HEIGHT
|
Long
|
The height of the tile(s) in pixels.
|
|
LEVEL
|
Long
|
The data resolution, where 0 is the full resolution image. A value of n (n > 0) indicates that the resolution is half that of the n-1 level.
|
|
DEST
|
OBJREF
|
The object reference to the destination object that displays the tiled IDLgrImage.
|
Keywords
None.
Version History
IDL Online Help (March 06, 2007)
