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:
|
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.
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