[Qgis-developer] Adding delimited text file as layer...

[Martin Dobias]

Hi,

the usage should be the same, you just need to load the layer with
other provider and with different URI. Here's how it's done in
delimited text plugin:

QString uri = QString("%1?delimiter=%2&xField=%3&yField=%4")
  .arg(filePath)
  .arg(delimiter)
  .arg(xField)
  .arg(yField);

// use "delimitedtext" provider instead of "ogr"
QgsVectorLayer* layer = new QgsVectorLayer(uri, name, "delimitedtext");

Where:
- filePath = complete path to the file
- delimiter = delimiter of the fields
- xField = name of the column with x values
- yField = name of the column with y values
- name = base name of the file (e.g. for path "/tmp/test.txt" it's "test")

I haven't tried that, it's just what I've looked up in the code (take
look at the plugin / provider to find out more).

Martin

On 10/2/06, Schalk Snyman <snymans at wbs.co.za> wrote:
> Hello,
>
> I have written a program to approximate the location of GSM cellphone
> users. At this moment all I really need QGIS for is to display the
> approximated points as well as the GPS points on a map (added as
> shapefile layer) - which pop-up after the calculations.
>
> I would like to use a comma-delimited text file X,Y to add the points as
> a layer. (It's OK if the points are in separate text files)
> I thought this would be relatively easy as this is already done rather
> easily in the QGIS 0.8 gui. However I struggle to keep my head together
> with all the gui slots and Qtishness (I'm new to Qt as well).
>
> I'm using Tim Sutton's "Tutorial 2: Using MapTools with the QGIS Canvas
> API" as a base point. How can I extend this code (with simple includes
> and of course on the same map canvas) to add a points layer from a
> delimited text file?
>
> Best Regards to fellow Developers!
>
> Schalk
> _______________________________________________
> Qgis-developer mailing list
> Qgis-developer at lists.qgis.org
> http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-developer
>