Purpose
Returns information about a specific thematic layer in a map. You can call this function from the MapBasic window in MapInfo Pro.
Syntax
ThemeInfo ( map_window_id, thematic_layer_id, attribute )map_window_id is a Map window identifier.
thematic_layer_id is a SmallInt that identifies a thematic layer in a Map.
attribute is a SmallInt code indicating the type of information to return; see table below.
Return Value
Depends on the attribute parameter.
Description
Theattribute parameter can be any value from the table below.
| attribute code | ID | ThemeInfo() returns |
|---|---|---|
| THEME_INFO_TYPE | 1 |
THEME_TYPE_RANGES (0) THEME_TYPE_BARS (1) THEME_TYPE_PIES (2) THEME_TYPE_GRADUATED (3) THEME_TYPE_DOTDENSITY (4) THEME_TYPE_UNIQUE (5) THEME_TYPE_GRID (6) |
| THEME_INFO_ITEM_COUNT | 2 | Integer result, representing the number of items in theme. |
| THEME_INFO_TABLE_ALIAS | 3 | String representing the table alias for table used to create the theme. |
| THEME_INFO_EXPRESSIONS_COUNT | 4 | Integer result representing the number of expressions or columns used in the theme. |
See Also: