MultiColumn ListBox Blink Simulation Problem

[schinni]

Hi,

I am using LV8.0 and we just upgraded one of our projects from LV7.1. I am having a problem and would be grateful if someone could help me out.

BACKGROUND ON THE TASK:

- We have a list of alarms that have been generated through several other processes.

- This list needs to be displayed in a MultiColumn ListBox to the users.

- Some alarms require user acknowledgement

- Until the user acknowledges those alarms, they need to blink (to catch the users' attention)

ISSUE:

- In LV7.1, setting the ActiveCell property to the relevant rows (in a loop) and setting the Blinking property to true or false appropriately worked like a charm

- In LV8 the whole listbox blinks - even those alarms that have already been acknowledged

- NI support said that they do not have anything to help individual rows blink. Only the listbox as a whole can be set to blink or not.

RESOLUTION:

- I tried to simulate blinking by having an independent loop run indefinitely (until the Panel Close event) and toggle the background colours of the relevant rows.

- It worked like a charm

PROBLEM:

- If the first row happens to be unacknowledged and hence needs to blink - it doesnt work.

- My indices seem to be correct and in sync. (The indices of the array of alarms and the index of the listbox items)

- Every thing works fine except the first row (The one immdly below the row headers). Instead, in a listbox with 20 rows, during runtime - a 21st row gets created at the bottom and that one blinks... The alarm data for the 1st row however still displays correctly in the 1st row. The 21st one at then end is an empty row that ends up blinking.

I am really at a loss as to why this might be happening and would greatly appreciate any help/suggestions.

Thanks so much.

[schinni]

I managed to get the solution.

I had made a stupid error which was because i didnt read the help documentation carefully enough and thus didnt realise the impact the oversight could have :headbang: . It was that i was setting the BGColor property and the ActiveCell property for the listbox. However my ActiveCell property was below the BGColor propery in the property node. The processing takes place in a top to bottom order for property nodes.

A simple reversal of the order and it now works like a charm :laugh: