Swap selected and saved

Command group Flag affected Reversible Execute on client Platform(s)
List lines YES NO NO All

Syntax

Swap selected and saved ([All lines]) {line-number (calculation)}

Options

All lines If specified, the command affects all the lines in the list

Description

This command swaps the Saved selection state and the Current selection state and sets the flag. To allow sophisticated manipulation of data via lists, a list can store two selection states for each line; the "Current" and the "Saved" selection. The Current and Saved selections have nothing to do with saving data on the disk; they are no more than labels for two sets of selections. The lists may be held in memory and never saved to disk: they will still have a Current and Saved selection state for each line but they will be lost if not saved. When a list is stored in the data file, both sets of selections are stored.

Swap selected and saved allows the Saved selection state of the specified line (or All lines) to be swapped with the Current set. You can specify a particular line in the list by entering either a number or a calculation. The All lines option swaps the selection status for all lines of the current list. The following example selects the middle line of the list:

Example

; Select all lines, save the selection, deselect all
; lines and then swap the selected and saved lines
; so all lines are selected
Set current list lMyList
Define list {lCol1}
For lCol1 from 1 to 6 step 1
  Add line to list {lCol1}
End For
Select list line(s) (All lines)
Save selection for line(s) (All lines)
Deselect list line(s) (All lines)
Swap selected and saved (All lines)