LISTBOX Get rows height

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4D v16.3


LISTBOX Get rows height ( {* ;} object {; unit} ) -> Function result

Parameter	Type	Description
*	Operator	If specified, object is an object name (string) If omitted, object is a variable
object	Form object	Object name (if * is specified) or Variable (if * is omitted)
unit	Longint	Unit of height value: 0 or omitted = pixels, 1 = lines
Function result	Integer	Row height

Description

The LISTBOX Get rows height command returns the current row height for the list box object set using the object and * parameters.

If you pass the optional * parameter, you indicate that the object parameter is an object name (string). If you do not pass this parameter, you indicate that the object parameter is a variable. In this case, you pass a variable reference instead of a string. For more information about object names, refer to the Object Properties section.

By default, if you omit the unit parameter, the row height returned is expressed in pixels. To set another unit, in the unit parameter you can pass one of the following constants, found in the List Box theme:

Constant	Type	Value	Comment
lk lines	Longint	1	Height is expressed as a number of lines. 4D calculates the height of a line according to the font.
lk pixels	Longint	0	Height is expressed as a number of pixels (default).

Note: For more information about calculating the height of rows, refer to the Design Reference manual.