Reading Layers from a Qgis Project File.

Some notes on reading individual layers out of a Qgis Project file. This should end up in a 'import layers from a project file' plugin.

1. get the xml into some text:

xml = file("project.qgs").read()


2. make a blank QDomDocument and set the content:

d = PyQt4.QtXml.QDomDocument()
d.setContent(xml)


3. Now find the maplayers:

maps = d.elementsByTagName("maplayer")


4. How many?

maps.length()


5. Now read the fourth layer (0-index) into running Qgis:

QgsProject.instance().read(maps.item(3))

Wrap this in a nice gui that tells the user what the map layers are, lets them check boxes, import the layers, marks the current project as dirty. Jobzagoodun.