[Qgis-developer] Re: project file transformation

[Tim Sutton]

Hi

I wonder what will happen if its running on a headless server etc. in
this case I would have thought screenresolutuon would be undefined?
Perhaps it just chooses a 'sensible default'?

regards

On 6/19/08, Hugentobler  Marco <marco.hugentobler at karto.baug.ethz.ch> wrote:
> Hi Tim,
>
> Ok, I'm going to use QPrinter for that. I also think it is better workaround
> than QPixmap because QPrinter doesn't need a running X-server.
>
> Thanks
> Marco
>
>
> -----Ursprüngliche Nachricht-----
> Von: Tim Sutton [mailto:tim at linfiniti.com]
> Gesendet: Mi 18.06.2008 22:55
> An: Hugentobler  Marco; qgis-developer at lists.osgeo.org; wonder.sk at gmail.com
> Betreff: Re: project file transformation
>
> Hi Marco
>
> Did you try QPrinter::ScreenResolution? Though I fear it may also
> require QtGui. Have a poke around in qgsquickprint.cpp to see my
> haphazrd way of trying to do dpi coversions between screen medium and
> print medium.
>
>
> Regards
>
> Tim
>
> On 6/18/08, Marco Hugentobler <marco.hugentobler at karto.baug.ethz.ch> wrote:
>> Hi,
>>
>> Ok, I wrote a transformation function from 0100 to 0110 in
>> qgsprojectfiletransform.cpp that adapts the pen width and pointsize.
>> However,
>> to calculate the appropriate value, it is necessary to know the screen
>> dpi.
>> What I did was to query QPixmap for it. I know this is bad, because
>> qgsprojectfiletransform is in core and QPixmap is a class that depends on
>> a
>> running X-server. So I see the following possibilities:
>>
>> 1. Remove the include of QPixmap and use a standard dpi value (e.g. 96 for
>> my
>> screen here)
>> 2. Use QPixmap (current Code)
>> 3. Someone knows about a better possibility to find out screen dpi
>>
>> My preferred possibility is 3. If this is not possible, then probably
>> version
>> 1 is best. Let me know what you think.
>>
>> Btw. I found that there was a function to transform from 0.9.1 to 0.10.0
>> and
>> no function that adresses 0.9.2. I inserted a function from 0.9.2 to
>> 0.10.0
>> that does nothing, but it would be cleaner to have transformation from
>> 0.9.1
>> to 0.9.2 and from 0.9.2 to 0.10.0.
>>
>> Regards,
>> Marco
>>
>> Am Samstag 17 Mai 2008 16:06:16 schrieb Tim Sutton:
>>> Hi Marco
>>>
>>> I wonder if its not better to make the change in Magnus Homanns rev-up
>>> code since this issue is going to affect everyone with old project and
>>> QGS files.
>>>
>>> regards Tim
>>>
>>> On 5/17/08, Marco Hugentobler <marco.hugentobler at karto.baug.ethz.ch>
>>> wrote:
>>> > Hi Tim,
>>> >
>>> > The failing renderer tests are caused by the fact that units are now mm
>>> > instead of pixel.
>>> > I' going to change the width/size values of the test qmls and the test
>>> > images
>>> > to make it run again.
>>> >
>>> > Regards,
>>> > Marco
>>> >
>>> > Am Freitag 16 Mai 2008 21:19:56 schrieb Tim Sutton:
>>> >> Hi All
>>> >>
>>> >> Recent commits in the last few days have introduced regressions (as
>>> >> can be seen by running the unit tests). Please remember to run the
>>> >> unit tests before committing changes to SVN. Currently we only have a
>>> >> few tests but they test core stuff like rendering. If you committed
>>> >> anything in the last few days please take a look and see if you have
>>> >> introduced these issues.
>>> >>
>>> >> The issues involve mainly symbol sizes for rendering as best I can
>>> >> make out. BTW I have not yet tried the test suite under win,but it
>>> >> works under mac & lin.
>>> >>
>>> >> Many thanks
>>> >>
>>> >> Tim
>>> >
>>> > --
>>> > Dr. Marco Hugentobler
>>> > Institute of Cartography
>>> > ETH Zurich
>>> > Technical Advisor QGIS Project Steering Committee
>>> > _______________________________________________
>>> > Qgis-developer mailing list
>>> > Qgis-developer at lists.osgeo.org
>>> > http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>
>>
>>
>> --
>> Dr. Marco Hugentobler
>> Institute of Cartography
>> ETH Zurich
>> Technical Advisor QGIS Project Steering Committee
>>
>
> --
> Sent from my mobile device
>
> Tim Sutton
> QGIS Project Steering Committee Member - Release  Manager
> Visit http://qgis.org for a great open source GIS
> openModeller Desktop Developer
> Visit http://openModeller.sf.net for a great open source ecological
> niche modelling tool
> Home Page: http://tim.linfiniti.com
> Skype: timlinux
> Irc: timlinux on #qgis at freenode.net
>
>

-- 
Sent from my mobile device

Tim Sutton
QGIS Project Steering Committee Member - Release  Manager
Visit http://qgis.org for a great open source GIS
openModeller Desktop Developer
Visit http://openModeller.sf.net for a great open source ecological
niche modelling tool
Home Page: http://tim.linfiniti.com
Skype: timlinux
Irc: timlinux on #qgis at freenode.net