Hi PythonOCC Team,
I'm having trouble viewing shapes from the python command prompt in
the new pythonocc-0.6 alpha distribution. I used to use pythonocc-0.5,
with this same code, and it didn't have this problem.
I stripped my code down to the bare minimum to replicate the error.
(So, technically, I haven't verified this exact code works on pythonocc-0.5.)
It closely follows the wxPython examples, viewer.py and viewer_basics.py.
A transcript of what happens from the python prompt follows. When I start
a view, the view window appears, and I can interact with it. When I close
the view and start a second view, or when I keep the view open and start a
second view, I get a "Cannot connect to server" error. A transcript and
source code follow. If you comment out all the lines with "self.canvas"
in the simple_display.py file, you'll remove pythonocc from the canvas and
you'll see what should happen.
I'm using Debian 6.0 Linux. Any help would be appreciated. It may
be a pythonocc-0.6 bug.
Thanks,
Charles
-------- The Transcript --------
(I had to replace >>> with --- because gmane thought I was top-posting.)
my_computer> python
Python 2.6.6 (r266:84292, Dec 27 2010, 00:02:40)
[GCC 4.4.5] on linux2
Type "help", "copyright", "credits" or "license" for more information.
--- import display
--- display.view()
--- ###### 3D rendering pipe initialisation #####
Display3d class initialization starting ...
Graphic device created.
Xw_Window created.
Viewer created.
Interactive context created.
Display3d class successfully initialized.
########################################
---
--- display.view()
--- ###### 3D rendering pipe initialisation #####
Display3d class initialization starting ...
Traceback (most recent call last):
File "simple_display.py", line 31, in add_view
View()
File "simple_display.py", line 54, in __init__
self.canvas.InitDriver()
File "/usr/local/lib/python2.6/dist-packages/OCC/Display/wxDisplay.py", line
151, in InitDriver
self._display.Create()
File "/usr/local/lib/python2.6/dist-packages/OCC/Display/OCCViewer.py", line
84, in Create
self.Init(self._window_handle)
RuntimeError: Aspect_GraphicDeviceDefinitionError
Cannot connect to server ''
-------- The display.py file --------
class MainThread(object):
def start(self):
self.app = None
import thread
thread.start_new_thread(self.run, ())
def run(self):
import simple_display
self.app = simple_display.SecondThreadApp(0)
self.app.MainLoop()
def add_view(self):
import simple_display
while not self.app: # Wait for app to be up and running
pass
evt = simple_display.AddView()
simple_display.wx.PostEvent(self.app.catcher, evt)
app = MainThread()
app.start()
def view():
app.add_view()
-------- The simple_display.py file --------
from OCC.Display.wxDisplay import wxViewer3d
import wx
# The following lines came from the wxPython examples (viewer.py and
# viewer_basics.py).
wx_EVT_ADD_VIEW = wx.NewEventType()
EVT_ADD_VIEW = wx.PyEventBinder(wx_EVT_ADD_VIEW, 1)
class AddView(wx.PyEvent):
def __init__(self):
wx.PyEvent.__init__(self)
self.SetEventType(wx_EVT_ADD_VIEW)
class HiddenCatcher(wx.Frame):
"""
The "catcher" frame in the second thread.
It is invisible. It's only job is to receive
Events from the main thread, and create
the appropriate windows.
"""
def __init__(self):
wx.Frame.__init__(self, None, -1, '')
self.Bind(EVT_ADD_VIEW, self.add_view)
def add_view(self, evt):
View()
class SecondThreadApp(wx.App):
"""
wxApp that lives in the second thread.
"""
def OnInit(self):
catcher = HiddenCatcher()
#self.SetTopWindow(catcher)
self.catcher = catcher
return True
# Now my class follows
class View(object):
"""
A frame for displaying pythonOCC models.
"""
def __init__(self):
self.frame = wx.Frame(None, -1, 'Test Viewer', size = (640, 480))
self.canvas = wxViewer3d(self.frame)
self.frame.Show(True)
wx.SafeYield()
self.canvas.InitDriver()
self.canvas.SetFocus()
def exit(self, event = None):
self.frame.Destroy()
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