The function I am working with is the XY to Line utility which expects each record in the data to have two location points. This could be in the form of just a NoGeometry table with two coordinates as part of the fields or it could be a point layer with one of the points represented by the layer geometry and the other within the table data. I guess I will need to open it up to include Lines and Polygons, but I don't think the source of this data would ever be a line or polygon, but who knows what users may do.
On Fri, Jul 6, 2018 at 8:38 PM, Nyall Dawson <[email protected]> wrote: > " > On Sat, 7 Jul 2018 at 03:26, C Hamilton <[email protected]> wrote: > > > > I'm trying to convert one of my Shape Tools algorithms to a processing > algorithm. My existing input layer either accepts a point vector layer or a > NoGeometry table. I was guessing that the proper way to implement this is: > > > > self.addParameter( > > QgsProcessingParameterFeatureSource( > > self.PrmInputLayer, > > 'Input layer', > > [QgsProcessing.TypeFile, QgsProcessing.TypeVectorPoint]) > > ) > > > > TypeFile seems to do nothing. It certainly does not show the CSV file I > have loaded that has no geometry. It filters the files so that only point > layers are available. Interestingly if I use just TypeFile it seems to > select all vector layer types. > > TypeFile is not correct here - from the docs, TypeFile = "Files (i.e. > non map layer sources, such as text files)". There's actually no way > to show only Point layers OR Geometry-less tables. The closest is > TypeVector, which will show all vector sources, including > points/line/polygons AND no geometry tables. > > But -- I'd question why you'd want to restrict your algorithm inputs > to Point/NoGeometry only in the first place. If your algorithm can > work with NoGeometry tables, it should also work with inputs with > Lines and Polygon geometries, and just ignore those. Otherwise you're > putting an artificial limitation on the inputs which can be used, > which is sure to annoy users somewhere down the line! > > Nyall >
_______________________________________________ QGIS-Developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
