[Qgis-developer] Re: error during linking{solved}
HI I solved the error which i was mentioned above , i didnt give right path for "SETUPAPI_LIBRARY", after i gave the error got resolved , but i got another error as "Linking CXX shared library libqgis_analysis.dll Creating library file: libqgis_analysis.dll.a [ 64%] Built target qgis_analysis [ 65%] Generating analysis/sipanalysispart0.cpp, analysis/sipanalysispart1.cpp, analysis/sipanalysispart2.cpp, analysis/sipanalysispart3.cpp sip: C:/msys/local/src/qgis-1.5.0/python/core/conversions.sip:271: Mapped type h as already been defined in another module mingw32-make[2]: *** [python/analysis/sipanalysispart0.cpp] Error 1 mingw32-make[1]: *** [python/CMakeFiles/python_module_qgis_analysis.dir/all] Err or 2 mingw32-make: *** [all] Error 2" could u plz help regards sunil -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/error-during-linking-tp5696331p5723585.html Sent from the qgis-developer mailing list archive at Nabble.com. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] Continuous Color style
Hi everybody, I'm working on OGR2Layers python plugin, I'd like to implement also continuous color style, but I didn't understand how can I assign a style to each features. With also style type like unique value or graduated I had all the classes of style (symbols class) with continuous color I had only the first (min value) and the last (max value), is there some mathematical functions for calculate the intermediate classes? Thank's Luca ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Qgis Api - select all features of a vector layer
Thanks for this answer
2010/11/9 Carson Farmer
> ...and with the newer PyQGIS API, we can do things even more Pythonically:
>
>
Is the new api usable from 1.5, or should I wait for the next version ?
> def layerIds(layer):
> layer.select([]) # we don't actually need the attributes
>ids = [feat.id() for feat in layer]
> return ids
>
> Obviously you could skip the step of creating the layerIds function,
> and then you'd reduce the entire thing down to:
>
> layer = self.iface.mapCanvas().currentLayer() # or however else you
> get the layer
> layer.select([]) # we don't actually need the attributes
> layer.setSelectedFeatures([feat.id() for feat in layer]) # select all
> the feature ids
>
Yes , it is more concise and the list comprehension is much more pythonistic
;)
I was on other php projects, and lost my python :)
>
> My guess is that this would be quite a bit faster than boundingbox
> method, especially because select(QgsRectangle, bool) actually
> contains this:
>
> QgsFeature f;
> while ( nextFeature( f ) )
> {
> select( f.id(), false );
> }
>
>
Ok. Thanks again !
> whereas setSelectedFeatures is more direct.
>
> Carson
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Re: [Qgis-developer] Qgis Api - select all features of a vector layer
...and with the newer PyQGIS API, we can do things even more Pythonically:
def layerIds(layer):
layer.select([]) # we don't actually need the attributes
ids = [feat.id() for feat in layer]
return ids
Obviously you could skip the step of creating the layerIds function,
and then you'd reduce the entire thing down to:
layer = self.iface.mapCanvas().currentLayer() # or however else you
get the layer
layer.select([]) # we don't actually need the attributes
layer.setSelectedFeatures([feat.id() for feat in layer]) # select all
the feature ids
My guess is that this would be quite a bit faster than boundingbox
method, especially because select(QgsRectangle, bool) actually
contains this:
QgsFeature f;
while ( nextFeature( f ) )
{
select( f.id(), false );
}
whereas setSelectedFeatures is more direct.
Carson
On 9 November 2010 16:46, Barry Rowlingson wrote:
> On Tue, Nov 9, 2010 at 4:22 PM, kimaidou wrote:
>> Hi again
>>
>> Still working on my python plugin...
>>
>> I need to simply select all the features of a chosen vector layer. In
>> QgsVectorLayer api, there is no method "selectAllFeatures()"
>>
>> So I use this piece of code to achieve it
>> http://osgeo.pastebin.com/Ma9DxgKR
>
> That's an interesting approach! My selectplus plugin has a 'select
> all' function which does this:
>
> def doit(self):
> layer = self.iface.mapCanvas().currentLayer()
> layer.setSelectedFeatures(layerIds(layer))
> return None
>
> where layerIds is:
>
> def layerIds(layer):
> ids = []
> p = layer.dataProvider()
> allAttrs = p.attributeIndexes()
> p.select(allAttrs)
> f = QgsFeature()
> while p.nextFeature(f):
> ids.append(f.id())
> return ids
>
> Your rectangle overlay should be pretty quick, but maybe my collecting
> all the feature IDs is quicker?
>
> Barry
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--
Carson J. Q. Farmer
ISSP Doctoral Fellow
National Centre for Geocomputation
National University of Ireland, Maynooth,
http://www.carsonfarmer.com/
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[Qgis-developer] Qgis Api - select all features of a vector layer
Hi again Still working on my python plugin... I need to simply select all the features of a chosen vector layer. In QgsVectorLayer api, there is no method "selectAllFeatures()" So I use this piece of code to achieve it http://osgeo.pastebin.com/Ma9DxgKR * Is there a better way to do so ? * Do you think a method selectAllFeatures() would be usefull ? If so I will add it to the trac. Thx again, Kimaidou ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Qgis Api - select all features of a vector layer
2010/11/9 Barry Rowlingson > > That's an interesting approach! My selectplus plugin has a 'select > all' function which does this: > I love coding : there is never one way to achieve things :) > >def doit(self): >layer = self.iface.mapCanvas().currentLayer() >layer.setSelectedFeatures(layerIds(layer)) >return None > > where layerIds is: > > def layerIds(layer): >ids = [] >p = layer.dataProvider() >allAttrs = p.attributeIndexes() >p.select(allAttrs) >f = QgsFeature() >while p.nextFeature(f): >ids.append(f.id()) >return ids > > Your rectangle overlay should be pretty quick, but maybe my collecting > all the feature IDs is quicker? > I don't know :) I tried to have a compact code, so I reused the api method that seemed simplier, in a spatial approach. ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Qgis Api - select all features of a vector layer
On Tue, Nov 9, 2010 at 4:22 PM, kimaidou wrote: > Hi again > > Still working on my python plugin... > > I need to simply select all the features of a chosen vector layer. In > QgsVectorLayer api, there is no method "selectAllFeatures()" > > So I use this piece of code to achieve it > http://osgeo.pastebin.com/Ma9DxgKR That's an interesting approach! My selectplus plugin has a 'select all' function which does this: def doit(self): layer = self.iface.mapCanvas().currentLayer() layer.setSelectedFeatures(layerIds(layer)) return None where layerIds is: def layerIds(layer): ids = [] p = layer.dataProvider() allAttrs = p.attributeIndexes() p.select(allAttrs) f = QgsFeature() while p.nextFeature(f): ids.append(f.id()) return ids Your rectangle overlay should be pretty quick, but maybe my collecting all the feature IDs is quicker? Barry ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Qgis Api - get a layer by its name
Hi Carson, Thanks for your reply 2010/11/9 Carson Farmer > Hi Kimaidou, > > I suspect that is how most plugin developers have implemented this > functionality, and for the most part it works (save for the situations > you listed below). > Ok One solution would be use userData to store the layers uniqueID, and > then use that to access layers later on. > First you add each layer name to the combobox, like so: > combobox.addItem ( layer.name(),QVariant(layer.getLayerID())) > UniqueId is the best candidate ! > > and then when the user select a layer from the combobox, get the > maplayer by doing something like (untested): > uniqueId = combobox.itemData(combobox.currentIndex()).toString() > layer = QgsMapLayerRegistry.instance().mapLayer(uniqueId) > Ok > > Of course, if you are simply listing all layers in the layer list, > then you could just use their order in the combobox, as this will be > the same as the order in the layer list. > layer = mapCanvas.layer(combobox.currentIndex()) > > Hope that helps, > That helps a lot, thanks ! Kimaidou ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Qgis Api - get a layer by its name
Hi Kimaidou, > I have not found any function in QgsMapLayer for getting a layer by its > name. I needed it on a python plugin to let the user choose a layer from a > combo box (already populated with the layer names) > So I created this function http://osgeo.pastebin.com/7EpNA3JL I suspect that is how most plugin developers have implemented this functionality, and for the most part it works (save for the situations you listed below). > > I have some questions regarding it: > * Is it the right way ? > * I have seen it is possible in Qgis to rename a layer, and 2 layers of the > same type can have the same name. This makes my function not working in all > the cases (which is my problem of course). Is there a reason to allow layers > to share a name ? One solution would be use userData to store the layers uniqueID, and then use that to access layers later on. First you add each layer name to the combobox, like so: combobox.addItem ( layer.name(),QVariant(layer.getLayerID())) and then when the user select a layer from the combobox, get the maplayer by doing something like (untested): uniqueId = combobox.itemData(combobox.currentIndex()).toString() layer = QgsMapLayerRegistry.instance().mapLayer(uniqueId) Of course, if you are simply listing all layers in the layer list, then you could just use their order in the combobox, as this will be the same as the order in the layer list. layer = mapCanvas.layer(combobox.currentIndex()) Hope that helps, Carson -- Carson J. Q. Farmer ISSP Doctoral Fellow National Centre for Geocomputation National University of Ireland, Maynooth, http://www.carsonfarmer.com/ ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] Qgis Api - get a layer by its name
Hi List I have not found any function in QgsMapLayer for getting a layer by its name. I needed it on a python plugin to let the user choose a layer from a combo box (already populated with the layer names) So I created this function http://osgeo.pastebin.com/7EpNA3JL I have some questions regarding it: * Is it the right way ? * I have seen it is possible in Qgis to rename a layer, and 2 layers of the same type can have the same name. This makes my function not working in all the cases (which is my problem of course). Is there a reason to allow layers to share a name ? Thanks for all the work done in Qgis Cheers Kimaidou ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] Saving OpenLayers as raster
Hi, I would like to ask the possiblity of saving the google layers we get from OpenLayers plugin as raster layers. The OpenLayers plugin is of a great help to me. And the ability to save those layers for moments without internet connection would be a great help!! ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] Hackfest last minute
Hi to All planning to attend the 4th QGIS Hackfest in Wrocław, This is the last minute to make up your mind and decide to participate. We will meet on Thursday, 11th November. The first, unofficial meeting we plan to start slowly at the Venue about 15.00-17.00. There you can get familiar with the venue facilities [1] or have the first coffee and start coding. The official meeting starts at 10 on Friday 12th at Department of Climatology and Atmosphere Protection, University of Wroclaw. The official meeting ends at 18 on Sunday 14th. Participants can extend meeting to 11 - 15th Nov. See you soon, Milena and Paweł [1] http://quantum-gis.pl/_detail/blog/ogrod.jpg?id=blog%3Aqgis_hackfest_venue_wroclaw_2010 -- Milena Nowotarska http://wiki.osgeo.org/wiki/Milena_Nowotarska http://quantum-gis.pl/ || http://grass-gis.pl/ http://www.qgis.org/wiki/4._QGIS_Hackfest_in_Wroclaw_2010 ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
