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
Le 01/04/2015 14:20, Werner Macho a écrit :
hmm -
well - as the qchainage plugin clearly sets labeling (when enabled)
you could take it and search for the missing piece..
regards
Werner
On Wed, Apr 1, 2015 at 2:19 PM, Casper Børgesen (CABO) <[email protected]> wrote:
No the triggerRepaint() didn't work, just to clarify that I tried that :)
Regards, Casper
-----Original Message-----
From: Werner Macho [mailto:[email protected]]
Sent: 1. april 2015 13:52
To: Casper Børgesen (CABO)
Cc: [email protected]
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
On Wed, Apr 1, 2015 at 1:48 PM, Casper Børgesen (CABO) <[email protected]> wrote:
Hi Werner
Sadly no, it does not.
Regards, Casper
-----Original Message-----
From: Werner Macho [mailto:[email protected]]
Sent: 1. april 2015 13:43
To: Casper Børgesen (CABO)
Cc: [email protected]
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
On Wed, Apr 1, 2015 at 1:25 PM, Casper Børgesen (CABO) <[email protected]> wrote:
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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