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.
I forgot to say, that I work on a SuSe Linux 10.2 distribution.
Thank you very much in advance for your help.
Daniela
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