Hi,
I have the same problem when I tried to set labels from a python plugin :
With this code, labels are correctly displayed without having to apply
layer properties, but only for points or polygons layers.
For lines layers, I have to apply layer properties in order to display
labels.
palLayer = QgsPalLayerSettings()
palLayer.readFromLayer(self.serpLayer)
palLayer.enabled = True
palLayer.fieldName = 'id'
palLayer.textFont.setPointSize(10)
palLayer.writeToLayer(self.serpLayer)
With this code, I get the same problem for points, lines and polygons
layers :
self.serpLayer.setCustomProperty('labeling', 'pal')
self.serpLayer.setCustomProperty('labeling/enabled', 'true')
self.serpLayer.setCustomProperty('labeling/fieldName', 'id')
self.serpLayer.setCustomProperty('labeling/fontSize', '10')
self.serpLayer.triggerRepaint() and/or self.iface.mapCanvas().refresh()
don't help.
Hope someone can help...
--
Christophe
Post by Werner Machohmm -
well - as the qchainage plugin clearly sets labeling (when enabled)
you could take it and search for the missing piece..
regards
Werner
Post by Casper Børgesen (CABO)No the triggerRepaint() didn't work, just to clarify that I tried that :)
Regards, Casper
-----Original Message-----
Sent: 1. april 2015 13:52
To: Casper Børgesen (CABO)
Subject: Re: [Qgis-user] Labels not visible when setting them programmatically.
Hi!
I thought maybe it is the
triggerRepaint()
but it was just a guess.
regards
Werner
Post by Casper Børgesen (CABO)Hi Werner
Sadly no, it does not.
Regards, Casper
-----Original Message-----
Sent: 1. april 2015 13:43
To: Casper Børgesen (CABO)
Subject: Re: [Qgis-user] Labels not visible when setting them programmatically.
Hi,
does
https://github.com/mach0/qchainage/blob/master/chainagetool.py
line 150 ff help you?
regards
Werner
I’m trying to programmatically set and enable labelling on a layer
using Python in QGis 2.9.0.
label = QgsPalLayerSettings()
label.readFromLayer(myLayer)
label.enabled = True
label.fieldName = 'myField'
# Just to change something clearly visible.
label.textColor = QColor(255,0,0,255)
label.writeToLayer(myLayer)
This doesn’t enable labelling, but if I enter the Layer Properties on
myLayer, everything looks okay and when pressing Apply, the labels
become visible.
Is there something I need to set to avoid having to manually click
Apply to get the labels visible?
Calling iface.mapCanvas().refresh() afterwards doesn’t work.
Regards, Casper
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