[Qgis-developer] Problem with intersects function on windows only

[Nic]

Hi

I have the same issue using Windows 7.

I've changed the code the intersection with pointBuff instead of pntGeom: 

if feat.geometry().intersects(pntBuff).

It returns a result but the only problem is that it will select every
feature within the:
 pntGeom.buffer( (self.canvas.mapUnitsPerPixel() * 2),0). This can create
problems if the user is zoomed out too far. So there must be a better way of
solving the Problem.

The feat.geometry().intersects(pntGeom) also works for Polygons. So I don't
think it's the intersect function that returns no geometry.

Kind regards


bertGIS wrote
> Hello,
> I use this code for selecting features, for selecting a feature and get
> its parameters in a form.
> It works well on Ubuntu, but when moving to Windows 7 with QGIS 1.7.4 or
> QGIS 1.8,
> the selection does not work, seems to be the intersect function that
> returns no geometry.
> 
> Does anybody knows something about that ?
> Thanks for your help
> 
> Cheers,
> Bert
> 
>   def selectFeature(self, point, button): 
>     self.selectList = []
>     QMessageBox.information( self.iface.mainWindow(),"Info", "in
> selectFeature function" )
>     pntGeom = QgsGeometry.fromPoint(point)
>     pntBuff = pntGeom.buffer( (self.canvas.mapUnitsPerPixel() * 2),0) 
>     rect = pntBuff.boundingBox()
>     if self.cLayer:
>       feat = QgsFeature()
>       self.provider.select([],rect) 
>       while self.provider.nextFeature(feat):
>         QMessageBox.information( self.iface.mainWindow(),"Info", "loop on
> features" )
>         if feat.geometry().intersects(pntGeom):
>           QMessageBox.information( self.iface.mainWindow(),"Info",
> "feature" + str(feat.id()) + " inter")
>           self.selectList.append(feat.id())
>       if self.selectList: 
>         self.cLayer.setSelectedFeatures(self.selectList)
>         self.updateForm()
>     else:
>       QMessageBox.information( self.iface.mainWindow(),"Info", "No layer
> currently selected in TOC" )





--
View this message in context: http://osgeo-org.1560.n6.nabble.com/Problem-with-intersects-function-on-windows-only-tp4998864p5003200.html
Sent from the Quantum GIS - Developer mailing list archive at Nabble.com.