[Qgis-developer] Symbology RFC

[Marco Hugentobler]

Hi Martin

> I've found out that I haven't included anything related to units used
> in the symbology. In current symbology options I see some weird
> default values like 0.26 and setting pen widths is very unintuitive
> (what units are those?). I think whenever in symbology-ng there will
> be setting for pen width, there should be a line edit widget +
> combobox where the user could specify what type of unit is he using
> (points / milimeters / ...)

Right, it would be very usefull to choose unit type.

Currently, the units are mm to ensure it looks the same on screen and when 
printing on QGraphicsScene/printer. QgsRenderContext::mScaleFactor is the 
factor that needs to be multiplied together with the outline width in pixels.

It would be nice if there was also the possibility to specify outline width in 
map units (like in the vector overlay branch, there is already the possibility 
to give diagram size in map units ).

Regards,
Marco


Am Dienstag 27 Januar 2009 12:57:21 schrieb Martin Dobias:
> On Tue, Jan 27, 2009 at 11:09 AM, Marco Hugentobler
>
> <marco.hugentobler at karto.baug.ethz.ch> wrote:
> > Hi Martin,
> >
> > Very nice RFC. No doubt the new symbology classes will be a great
> > addition for QGIS.
> >
> > Btw, do you export the cap style and line join options in the dialog for
> > the simple line (I don't have Python installed here at work so I can't
> > check right now)? If not, it should be straightforward to provide a GUI
> > for it. In the current symbology dialogs, we don't have a GUI to set them
> > even though they are supported by Qt.
>
> Hi Marco,
>
> line caps and joins are also planned, but not implemented in the
> prototype. You're right, it should be straightforward to include them
> - I just didn't want to pollute the prototype with too many features
> (since it's only a prototype).
>
> I've found out that I haven't included anything related to units used
> in the symbology. In current symbology options I see some weird
> default values like 0.26 and setting pen widths is very unintuitive
> (what units are those?). I think whenever in symbology-ng there will
> be setting for pen width, there should be a line edit widget +
> combobox where the user could specify what type of unit is he using
> (points / milimeters / ...)
>
> Martin

-- 
Dr. Marco Hugentobler
Institute of Cartography
ETH Zurich
Technical Advisor QGIS Project Steering Committee