LISTBOX GET ARRAYS

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4D v17.4

LISTBOX GET ARRAYS


LISTBOX GET ARRAYS ( {* ;} object ; arrColNames ; arrHeaderNames ; arrColVars ; arrHeaderVars ; arrColsVisible ; arrStyles {; arrFooterNames ; arrFooterVars} )

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)
arrColNames	String array	Column object names
arrHeaderNames	String array	Header object names
arrColVars	Pointer array	Pointers to column variables or Pointers to column fields or Nil
arrHeaderVars	Pointer array	Pointers to header variables
arrColsVisible	Boolean array	Visibility of each column
arrStyles	Pointer array	Pointers to arrays, or style, color and row control variables, or Nil
arrFooterNames	String array	Column footer object names
arrFooterVars	Pointer array	Pointers to column footer variables

Description

The LISTBOX GET ARRAYS command returns a set of synchronized arrays providing information on each column (visible or invisible) in the list box set in 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.

Once the command is executed:

The arrColNames array contains the list of object names for each column in the list box.
The arrHeaderNames array contains the list of object names for each column header in the list box.
The arrColVars array contains, for an array type list box, pointers toward variables (arrays) associated with each column of the list box. For a selection type list box, arrColVars contains:
- For a column associated with a field, a pointer to the associated field,
- For a column associated with a variable, a pointer to the variable,
- For a column associated with an expression, a Nil pointer.
The arrHeaderVars array contains pointers toward variables associated with each column header of the list box.
The arrColsVisible array contains a Boolean value for each column, indicating whether the column is visible (True) or hidden (False) in the list box.
The arrStyles array contains, for an array type list box, four pointers to four arrays that allow the applying of a specific style, font color, background color and custom display control to each row of the list box. These arrays are associated with the list box in the Property List of the Design environment or using the LISTBOX SET ARRAY command. If an array is not specified for the list box, the corresponding item in arrStyles will contain a Nil pointer.
The fourth pointer corresponds either to a Boolean array (Hidden Rows Array), or to a longint array (array used to set hidden, disabled and non-selectable rows) based on the implementation used for the row control array (see List box specific properties).
For record selection, collection or entity selection type list boxes, arrStyles contains:
- For each configuration set via a variable, a pointer to the variable,
- For each configuration set via an expression, a Nil pointer.