Hi everyone,
when I want to open a database with geometry data in it with the program
MezoGis I receive the following GTK-Warning:
/usr/local/lib/python2.5/site-packages/mezoGISlib/_canvas.py:530: GtkWarning:
Using Cairo rendering requires the drawable argument to
have a specified colormap. All windows have a colormap,
however, pixmaps only have colormap by default if they
were created with a non-NULL window argument. Otherwise
a colormap must be set on them with gdk_drawable_set_colormap
self.ctx = self.pixmap.cairo_create()
Traceback (most recent call last):
File "/usr/local/lib/python2.5/site-packages/mezoGISlib/_pane_db.py", line
537, in __on_doubleclick
self.pgbutler.runQuery('SELECT * FROM %s'%table.getSQL())
File "/usr/local/lib/python2.5/site-packages/mezoGISlib/_guicore.py", line
412, in runQuery
self.showResults(cursor, query, layer, resultset, tablelist)
File "/usr/local/lib/python2.5/site-packages/mezoGISlib/_guicore.py", line
446, in showResults
mapview = openMapView(layer.resultset)
File "/usr/local/lib/python2.5/site-packages/mezoGISlib/_guiwindows.py", line
33, in openMapView
m = MapWindow(resultset)
File "/usr/local/lib/python2.5/site-packages/mezoGISlib/_guiwindows.py", line
139, in __init__
self.canvas = MapCanvas()
File "/usr/local/lib/python2.5/site-packages/mezoGISlib/_canvas.py", line 86,
in __init__
self.__createNewCanvas()
File "/usr/local/lib/python2.5/site-packages/mezoGISlib/_canvas.py", line
530, in __createNewCanvas
self.ctx = self.pixmap.cairo_create()
cairo.Error: NULL pointer
A mapframe is also created, but somehow there is no content in it or nothing is
shown on/in the map.
I am nearly for 100% sure, that there is no mistake in my geometry data,
because the extend is correct initialized, when I start the database.
Has anyone an idea, what I could do??? I am totally desperate, because the
program will not work.
In the source code I made some print-commands, to see how far the program goes
and there I saw, that mezogis goes in the file _canvas.py and also in the
function " def __createNewCanvas(self): ". But then, when mezogis should show
the extend (with a print command) of the table, I get height: 1 and width: 1.
And this can't be right, because my database is filled with geodata of the
world, and this extend can't be just 1.
Something must be wrong with the line:
aw = self.mapframe.get_allocation()
because afterwards the height and width is set, and with print I get the extend
of 1, like I said.
The get_allocation command is a method of python, or what does it do??? I ask,
because in no other file this method is used (ok, just in one of
_guiwindows.py, but there, the line is commented out).
When I use the SQL-command (Select * from "public"."dbname" )to show me the
content of the database I get the messages which I wrote above.
The program is able to show all data in a table, except from the
geometry-column. But actually I wanted a map created, which looks like a
worldmap and with which I could work, but without mezogis is quit useless for
me.
Also with a database of randomized created geometry data I have the same
problem.
Thank you very much in advance for your help.
Daniela
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