[Qgis-user] data defined labelling field details?

[William Kyngesburye]

On Jan 11, 2011, at 2:17 PM, Paolo Cavallini wrote:

> Il giorno mar, 11/01/2011 alle 11.24 -0600, William Kyngesburye ha
> scritto:
> 
>> So, when you say new and old engines, will the new engine replace the old one someday?
> 
> I hope it will happen soon: the current situation is rather confusing.
> Could you please note the missing features you need in new symbology, so
> we'll know when it is ready to replace the old one?
> Thanks.

I would say make sure all capabilities from the old are available in the new, unless there was some very specific reason to not include them.

specifically:

- As I noted, data-driven offsets as an alternative to absolute position.

- I see that the data-driven buffer settings are inconsistent between the old and new.  The old can set transparency from data but not color, and the new can set color from data but not transparency.  How about both?

Additional options to consider:

- data-driven scale dependent rendering values.  And same for the general feature rendering.  I've been designing my data with this in mind and was disappointed that it isn't possible yet - scale dependent rendering is only per layer.

- some way to specify in any data-driven setting to use the non-data driven setting, like an invalid or null value.  That is, say for placement, if the data value is NULL or empty use the around/over setting in the Advanced tab.  That way you can let the engine calculate fixed/dynamic settings and override them to fine-tune labelling of specific features.

-----
William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
http://www.kyngchaos.com/

The equator is so long, it could encircle the earth completely once.