topic Enable/Disable Expression from Script in QlikView

Enable/Disable Expression from Script

Fri, 17 Apr 2009 23:52:26 GMT

Is it possible to enable or disable expressions from the script? I know this can be done from creating a macro to run OnOpen..however, I don't want to prolong the opening of the document. I also want to avoid using IF statements in my expressions. Any ideas? Thanks!

Enable/Disable Expression from Script

Oleg_Troyansky — Sat, 18 Apr 2009 01:49:48 GMT

Unfortunately, Enable/Disable property cannot be defined with an expression, and therefore the only way to change it is via macro. I think I saw something about improving it in version 9, but I'm not totally sure...

The only work around that I could suggest is to keep duplicate copies of your charts/objects and play with the "Show condition" for those objects - those conditions can be calculated via expressions, and therefore you can control them from the script.

Hope it helps,

Oleg

Enable/Disable Expression from Script

Sat, 18 Apr 2009 01:58:25 GMT

Thanks for the quick response. I'll take your suggestion into consideration.

Enable/Disable Expression from Script

Sat, 18 Apr 2009 02:03:08 GMT

You can, however, drop a FIELD from a script... and you can do this based on the particular user using Section Access. Check out 30.8Dynamic Data Reduction in the manual

Enable/Disable Expression from Script

Oleg_Troyansky — Sat, 18 Apr 2009 02:18:53 GMT

Anthony,

good catch, I haven't thought about it!

What happens to the expressions, thought? If we DROP or even OMIT the field [Cost], based on Section Access, and we have an expression for Margins:

=(sum(Sales) - sum(Cost))/sum(Sales)

What is going to happen to the expression? Is it going to be automatically removed or would just show nulls ?

thanks!

Oleg

Enable/Disable Expression from Script

Thu, 07 May 2009 21:33:43 GMT

I think it will just show nulls and will not disable the expression from the graph ....

Enable/Disable Expression from Script

yblake — Wed, 13 May 2009 23:53:27 GMT

Bonjour Philippe,

This is a work around implemented for one of our projects, to change dynamically a column content, depending on dynamic criterias :

This expression will show different calculations, depending on IdColumn dimension value :

=pick(match(only(IdColumn),'A-1','N','O','M','A','A/A-1','A/O'),
num(sum(Turnover*_Y1*Change),'# ##0,0;-# ##0,0'),
num(sum(Turnover*_FM*Change),'# ##0,0;-# ##0,0'),
num(sum(Turnover*_F0*Change),'# ##0,0;-# ##0,0'),
num(sum(Turnover*_M0*Change),'# ##0,0;-# ##0,0'),
num(sum(Turnover*_Y0*Change),'# ##0,0;-# ##0,0'),
num((sum(Turnover*_Y0)/sum(CA*_Y1))-1,'0,0%'),
num((sum(Turnover*_Y0)/sum(CA*_F0))-1,'0,0%'))

In this example, IdColumn is last dimension of the pivot table, and loaded from an InLine table as an unliked table (called a "logical" island in QV documentation) :

LOAD * INLINE [
IdColumn, ColumnName
A-1, Réalisation A-1
N, Objectif mois
O, Objectif cumulé
M, Réalisé mois
A, Réalisé cumulé
A/A-1, Ecart réalisé / A-1
A/O, Ecart réalisé / Objectif
];

You may use same kind of work around, replacing IdColumn dimension values, i.e by a calculated dimension using ValueList or ValueLoop.

note however that you can change dynamically your table content, but you will always have the same number of columns displayed.

Bon courage

Enable/Disable Expression from Script

Thu, 14 May 2009 01:07:05 GMT

Yves,

Merci beaucoup.

That works perfectly...

Philippe

Enable/Disable Expression from Script

Wed, 03 Nov 2010 13:08:27 GMT

very nice work around.

Thanks a lot

Greetz, Dirk