font.deriveFont problem

Ignition
1

Good morning!

I’m struggling to make work a simple font size change via scripting of a numeric label.

I create I template where I count the actual active alarms and according to the totalizer I change the font size.

I try using this code:

lblConteggioAllarmi = event.source.getComponent('lblConteggioAllarmi')
lblConteggioAllarmi.font = lblConteggioAllarmi.font.deriveFont(60.0)

and this just to be sure to call the exact component:

event.source.getComponent('lblConteggioAllarmi').font = event.source.getComponent('lblConteggioAllarmi').font.deriveFont(60.0)

but in both cases I have no size font change.

Where do I wrong?

Thank you for the help.

2

Both should work BUT

I think you mean

event.source.parent.getComponent('lblConteggioAllarmi').font = event.source.parent.getComponent('lblConteggioAllarmi').font.deriveFont(60.0)

Note you’re missing parent key words

3

Good morning jespinmartin1,
I’ve just tried to change the line in

event.source.parent.getComponent('lblConteggioAllarmi').font = event.source.parent.getComponent('lblConteggioAllarmi').font.deriveFont(60.0)

but I have this error:

Traceback (most recent call last):
** File “event:propertyChange”, line 71, in **
TypeError: getComponent(): 1st arg can’t be coerced to int

Ignition v8.1.6 (b2021052512)
Java: Azul Systems, Inc. 11.0.11

where line 71 is the one I’ve just edit.

4

No, the parent keywords weren’t missing. (I presume that the propertyChange event is on the root container.)

I think you are running into the fact that the font on a label is evaluated only when text is to be drawn. As a passive property, .font doesn’t generate a change event itself. (It doesn’t show up in a property binding list as a possible source.) So the font property is likely changing, but the label isn’t being redrawn. You’ll probably have to assign to its .text property to make it redraw.

5

Yes you are right, I manage the script on the root container and I have custom property for the different alarms (active, clear, ack and unacked). Then I make the count and I would like to change the font size according to the number of alarms ( <10 between 10-99 and >100 ).

Thanks for your help, I'll try to play on the text and I'll let you know the result.

6

Then you are calling the script from itself. In that case just do
event.source.font=event.sount.font.deriveFont(60.0)