Purpose
Modifies a thematic map layer. You can issue this statement from the MapBasic window in MapInfo Pro.
Syntax
Set Shade
[ Window window_id ] { map_layer_id | "table ( theme_layer_id )" }
[ Style Replace { On | Off } ]
... window_id is an integer window identifier.
map_layer_id is a SmallInt value, representing the layer number of a thematic layer.
table is the name of the table on which a thematic layer is based.
theme_layer_id is a SmallInt value, one or larger, representing which thematic layer to modify (for example, one represents the first thematic layer created).
Description
After you use the Shade statement to create a thematic map layer, you can use the Set Shade statement to modify the settings for that thematic layer. Issuing a Set Shade statement is analogous to clicking the Modify Theme command (on the LEGEND tab). The syntax of the Set Shade statement is identical to the syntax of the Shade statement, except for the way that the Set Shade statement identifies a map layer. A Set Shade statement can identify a layer by its layer number, as shown below:
Set Shade
Window i_map_winid
2
With Num_Hh_90
Graduated 0.0:0 11000000:24 Vary Size By "SQRT"Or a Set Shade statement can identify a map layer by referring to the name of a table (the base table on which the layer was based), followed by a number in parentheses:
Set Shade
Window i_map_winid
"States(1)"
With Num_Hh_90
Graduated 0.0:0 11000000:24 Vary Size By "SQRT"The number in parentheses represents the number of the thematic layer. To modify the first thematic layer that was based on the States table, specify States(1), etc.
Style Replace On (default) specifies the layers under the theme are not drawn.
Style Replace Off specifies the layers under the theme are drawn, allowing for multi-variate transparent themes.
Style Replace On is the default and provides backwards compatibility with the existing behavior so that the underlying layers are not drawn.
See Also:
Shade statement