[Qgis-developer] Data defined symbol dimension: bug?

[Anita Graser]

Am 11.03.2014, 19:49 Uhr, schrieb Giovanni Manghi  
<giovanni.manghi at faunalia.pt>:

>> Hi all.
>> I noticed a strange behaviour in data defined symbol size. With this  
>> expression:
>> ( year(  "data_inizio"  )-1985) /10
>> I get the attached image1.jpg (labels are made with the same  
>> expression).
>> With this one:
>> ( year(  "data_inizio"  )) /100
>> I get image2.jpg, also attached. Same scale. So size is calculated  
>> correctly, but
>> displayed wrongly.
>> Seems like a bug, right?
>
> if I define an expression like
>
> ("column_int" -1985)/4+5
>
> the preview is ok, but...
>
> after re-opening the expression for the data defined size it shows as
>
> "column_int" - 1985/4+5
>
> the parentheses are gone and of course the result is much different
> from the expected one...


I also noticed that "some_column" / 5.0
is changed to "some_column" / 5
and thus the result may no longer be a float value.

Best wishes,
Anita





>
>
> cheers!
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