[Qgis-user] WMS display issue and QGIS based standalone application

[Thomas Gratier]

Hi,

Thanks for your answer, Tim. The framadrop link is working on my side. You
may try again.

So to directly answer to your question without the framadrop issue.

In fact, I do not declare any layer here in the code but I only reference a
different "qgs" file.
One is with only a shapefile (Natural Earth Data countries), a second one
with both shapefile and WMS from OpenGeo GeoServer demo
(exact url for data source is
contextualWMSLegend=0&crs=EPSG:4326&dpiMode=7&featureCount=10&format=image/png&layers=ne:NE1_HR_LC_SR_W_DR&styles=&url=
http://demo.boundlessgeo.com/geoserver/wms)


The code is the following (tested with QGIS 2.10)

# coding:utf-8

# A simple demonstration of how to load a QGIS project and then
# show it in a widget.
# This code is public domain, use if for any purpose you see fit.
# Tim Sutton 2015

import os
from qgis.core import QgsProject
from qgis.gui import QgsMapCanvas, QgsLayerTreeMapCanvasBridge
from qgis.core.contextmanagers import qgisapp
from PyQt4.QtCore import QFileInfo, Qt

with qgisapp():
    project_path =
os.path.join(os.path.dirname(os.path.realpath(__file__)), 'world.qgs')
    canvas = QgsMapCanvas(None)
    canvas.setCanvasColor(Qt.white)
    canvas.enableAntiAliasing(True)

    # Load our project
    bridge = QgsLayerTreeMapCanvasBridge(
        QgsProject.instance().layerTreeRoot(), canvas)
    QgsProject.instance().read(QFileInfo(project_path))
    canvas.setCrsTransformEnabled(True)
    canvas.mapRenderer().setProjectionsEnabled(True)

    canvas.show()

Only `world.qgs` file changes as already explained

Cheers


Thomas Gratier

2015-10-21 23:28 GMT+02:00 Tim Sutton <tim at qgis.org>:

> Hi Thomas
>
> On 12 Oct 2015, at 18:08, Thomas Gratier <osgeo.mailinglist at gmail.com>
> wrote:
>
> Hi,
>
> I'm working with the Python API to create a standalone app.
> When I reuse this sample from
> http://kartoza.com/how-to-load-a-qgis-project-in-python/, it works
> perfectly with only vector layer(s).
> When I use a WMS with a vector layer, it fails directly.
> I've done two samples to demonstrate the issue. You can take samples from
> https://framadrop.org/r/kkC2MVV9TH#anlncOhrg5vbo5W7D8Lfjg8ghRq7BTo9flJXvnIV+Io=
>
>
> It seems like that framadrop.org site is broken (FileConstructor is not a
> constructor (evaluating 'new File(a, data.name, {type: data.type})’)) so
> I cannot view the example. But you said above that you were trying ‘WMS
> with a vector layer’ so I am wondering if you have been trying to add a WMS
> layer as a raster layer rather than a vector layer? If you can just reply
> with the relevant snippet of code you are trying to use that would help to
> see what is going on.
>
> Regards
>
> Tim
>
>
> Run the working vector sample with:
>     python test_project_standalone_no_wms.py
>
> Run the non working wms + vector sample with:
>     python test_project_standalone.py
>
> I should miss something. Do you have any clue? It's a bug or a feature
> (unwanted for my case)?
>
> Cheers
>
> Thomas Gratier
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
>
>
>
>
> Tim Sutton
> QGIS Project Steering Committee Member
> tim at qgis.org
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20151022/f5444c77/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: PastedGraphic-1.tiff
Type: image/tiff
Size: 9882 bytes
Desc: not available
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20151022/f5444c77/attachment.tiff>