Hi,
i am new to the qgis api using the code examples to get a better understanding.
https://github.com/qgis/qgis-code-examples
unfortunately I get a "layer not valid" message for examples 1 and 2.
fortunately the TIFF in example 4 does get loaded.
so based on ex 4 i added the following lines to example 2:
QString myFileName = QFileDialog::getOpenFileName(this, tr("Open File"),
QCoreApplication::applicationDirPath () ",
tr("Shape (*.shp)"));
QFileInfo myVectorFileInfo(myFileName);
QgsVectorLayer * mypLayer = new QgsVectorLayer(myVectorFileInfo.filePath(),
myVectorFileInfo.completeBaseName());
Selecting a shapefile goes well, however I still get the "layer not valid"
message
In phyton loading a layer is also a problem using the code in the phyton
console of Qgis:
----
layer = QgsVectorLayer("/home/jellema/Documents/A.shp", "layer_name", "ogr")
if not layer.isValid():
print "Layer failed to load!"
---
However it works fine using:
----
qgis.utils.iface.addVectorLayer("/home/jellema/Documents/A.shp", "layer_name",
"ogr")
----
Can somebody give me some isight on what goes wrong?
Andre _______________________________________________
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