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<p class="MsoNormal"><span style="color:#1F497D">Hei Sverre,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Did you consider writing a GDAL/OGR driver for your format, which then could be used by QGIS for accessing it?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">That way it could also be used in / accessed by other OSGeo tools?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Stefan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="mso-fareast-language:NO-BOK">From:</span></b><span lang="EN-US" style="mso-fareast-language:NO-BOK"> qgis-developer-bounces@lists.osgeo.org [mailto:qgis-developer-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Sverre Jonassen<br>
<b>Sent:</b> 28. januar 2015 13:05<br>
<b>To:</b> qgis-developer@lists.osgeo.org<br>
<b>Subject:</b> [Qgis-developer] Best practice for a new Vector Data Provider<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi everybody,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">I am currently trying to make a new vector data provider with a source select dialog for QGIS so that QGIS can read and display data stored in a custom format. The
format in question proprietary to software developed and maintained by the company I work at. I am quite new to developing for QGIS and I am struggling to find the best approach to do this. I hope that somebody out there can help me. I have not been able to
find any internet resources on best practices for a data provider plugin.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">So far, I have succeeded in creating a very simple vector data provider plugin and accessing it through a source select dialog (which I have added to the src/ui/-folder).
This is, of course, not a suitable approach as it would mean that I have to build and deploy my own version of QGIS instead of a plugin. As far as I have understood it, there might be 3 possible approaches for me to make a new provider with a source select
dialog:<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">An ordinary C++ plugin for the source select dialog containing the provider. Is this possible? I have tried this and so far not succeeded.<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">A provider plugin containing all necessary ui. Is this possible? And if so, how can I add a menu-item to activate the source select dialog?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">A provider plugin without ui and a separate plugin with the source select dialog.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">A fourth option would be to create a plugin for OGR. This is, however, not a good solution for me because I would run a high risk of data conversion errors. Our
format is much more similar to the QGIS internal geodata model than to the OGR geodata model.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">I am developing on the Windows platform, using Visual Studio 2010. Primarily I want to create a C++-plugin since the API for our proprietary format is written in
C++, and because my daily development environment has no support for Python.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Any help would be greatly appreciated,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">Sverre Jonassen</span></b><span lang="EN-US" style="font-size:10.0pt;color:black;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">Senior software engineer</span></i><span lang="EN-US" style="font-size:8.0pt;color:black;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:NO-BOK"><a href="mailto:Navn.navnsen@norkart.no"><i><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#51A026;text-decoration:none">sverre.jonassen@norkart.no</span></i></a></span><span style="font-size:8.0pt;color:#51A026;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">+47 402 45 794</span></i><span style="font-size:8.0pt;color:black;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black;mso-fareast-language:NO-BOK"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black;mso-fareast-language:NO-BOK"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black;mso-fareast-language:NO-BOK"><img border="0" width="135" height="37" id="Bilde_x0020_1" src="cid:image001.png@01D03B1E.97F1D390"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;color:black;mso-fareast-language:NO-BOK"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">Løkketangen 20A</span><span style="font-size:8.0pt;color:black;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">Postboks 145</span><span style="font-size:8.0pt;color:black;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">N- 1300 Sandvika</span><span style="font-size:8.0pt;color:black;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#272726;mso-fareast-language:NO-BOK">+47 67 55 14 00</span><span style="font-size:8.0pt;color:black;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:NO-BOK"><a href="http://www.norkart.no/"><i><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#51A026;text-decoration:none">norkart.no</span></i></a></span><span style="font-size:8.0pt;color:#51A026;mso-fareast-language:NO-BOK"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#51A026;mso-fareast-language:NO-BOK">______</span></i><i><span style="font-family:"Arial",sans-serif;mso-fareast-language:NO-BOK"><o:p></o:p></span></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
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