/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 1501 by jonathan, Tue Jul 29 13:50:35 2003 UTC revision 1650 by bh, Mon Aug 25 15:05:49 2003 UTC
# Line 26  from Thuban.Lib.fileutil import get_appl Line 26  from Thuban.Lib.fileutil import get_appl
26  from Thuban import _  from Thuban import _
27  from Thuban.Model.session import create_empty_session  from Thuban.Model.session import create_empty_session
28  from Thuban.Model.save import save_session  from Thuban.Model.save import save_session
29  from Thuban.Model.load import load_session  from Thuban.Model.load import load_session, LoadCancelled
30  from Thuban.Model.messages import MAPS_CHANGED  from Thuban.Model.messages import MAPS_CHANGED
31  from Thuban.Model.layer import RasterLayer  from Thuban.Model.layer import RasterLayer
32  import Thuban.Model.resource  import Thuban.Model.resource
# Line 38  import mainwindow Line 38  import mainwindow
38  from messages import SESSION_REPLACED  from messages import SESSION_REPLACED
39    
40    
   
41  class ThubanApplication(wxApp, Publisher):  class ThubanApplication(wxApp, Publisher):
42    
43      """      """
# Line 50  class ThubanApplication(wxApp, Publisher Line 49  class ThubanApplication(wxApp, Publisher
49      """      """
50    
51      def OnInit(self):      def OnInit(self):
52            sys.excepthook = self.ShowExceptionDialog
53          self.splash = self.splash_screen()          self.splash = self.splash_screen()
54          if self.splash is not None:          if self.splash is not None:
55              self.splash.Show()              self.splash.Show()
# Line 189  class ThubanApplication(wxApp, Publisher Line 189  class ThubanApplication(wxApp, Publisher
189          """          """
190          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
191    
192      def OpenSession(self, filename):      def OpenSession(self, filename, db_connection_callback = None):
193          """Open the session in the file named filename"""          """Open the session in the file named filename"""
194          # Make sure we deal with an absolute pathname. Otherwise we can          # Make sure we deal with an absolute pathname. Otherwise we can
195          # get problems when saving because the saving code expects an          # get problems when saving because the saving code expects an
196          # absolute directory name          # absolute directory name
197          filename = os.path.abspath(filename)          filename = os.path.abspath(filename)
198          session = load_session(filename)          try:
199                session = load_session(filename,
200                                   db_connection_callback=db_connection_callback)
201            except LoadCancelled:
202                return
203          session.SetFilename(filename)          session.SetFilename(filename)
204          session.UnsetModified()          session.UnsetModified()
205          self.SetSession(session)          self.SetSession(session)
# Line 204  class ThubanApplication(wxApp, Publisher Line 208  class ThubanApplication(wxApp, Publisher
208              for layer in map.Layers():              for layer in map.Layers():
209                  if isinstance(layer, RasterLayer) \                  if isinstance(layer, RasterLayer) \
210                      and not Thuban.Model.resource.has_gdal_support():                      and not Thuban.Model.resource.has_gdal_support():
211                      msg = _("The current session contains Image layers,\n" +                      msg = _("The current session contains Image layers,\n"
212                              "but the GDAL library is not available to " +                              "but the GDAL library is not available to "
213                              "draw them.")                              "draw them.")
214                      dlg = wx.wxMessageDialog(None,                      dlg = wx.wxMessageDialog(None,
215                                               msg,                                               msg,
216                                               _("Library not available"),                                               _("Library not available"),
217                                               wx.wxOK | wx.wxICON_INFORMATION)                                               wx.wxOK | wx.wxICON_INFORMATION)
218                      print msg                      print msg
# Line 225  class ThubanApplication(wxApp, Publisher Line 229  class ThubanApplication(wxApp, Publisher
229          else:          else:
230              self.top.SetMap(None)              self.top.SetMap(None)
231    
232  in_exception_dialog = 0 # flag: are we already inside the exception dialog?      in_exception_dialog = 0 # flag: are we already inside the exception dialog?
   
 def show_exception_dialog(exc_type, exc_value, exc_traceback):  
     """Show a message box with information about an exception.  
   
     The parameters are the usual values describing an exception in  
     Python, the exception type, the value and the traceback.  
   
     This method can be used as a value for the sys.excepthook.  
     """  
     global in_exception_dialog  
233    
234      if in_exception_dialog:      def ShowExceptionDialog(self, exc_type, exc_value, exc_traceback):
235          return          """Show a message box with information about an exception.
236      in_exception_dialog = 1      
237      while wxIsBusy():          The parameters are the usual values describing an exception in
238          wxEndBusyCursor() # reset the mouse cursor          Python, the exception type, the value and the traceback.
239        
240      try:          This method can be used as a value for the sys.excepthook.
241          lines = traceback.format_exception(exc_type, exc_value,          """
242                                             exc_traceback)  
243          message = "An unhandled exception occurred:\n%s\n" % exc_value+\          if self.in_exception_dialog:
244                    "(please report to " \              return
245                    "http://thuban.intevation.org/bugtracker.html)"\          self.in_exception_dialog = 1
246                    "\n\n\n"+\          while wxIsBusy():
247                    "".join(lines)              wxEndBusyCursor() # reset the mouse cursor
248          print message  
249            try:
250          # We don't use an explicit parent here because this method might              lines = traceback.format_exception(exc_type, exc_value,
251          # be called in circumstances where the main window doesn't exist                                              exc_traceback)
252          # anymore.              message = "An unhandled exception occurred:\n%s\n" % exc_value+\
253          dlg = wxScrolledMessageDialog(None, message,                      "(please report to " \
254                                        "Thuban: Internal Error")                      "http://thuban.intevation.org/bugtracker.html)"\
255          dlg.ShowModal()                      "\n\n\n"+\
256          dlg.Destroy()                      "".join(lines)
257                print message
258      finally:  
259          in_exception_dialog = 0              # We don't use an explicit parent here because this method might
260          # delete the last exception info that python keeps in              # be called in circumstances where the main window doesn't exist
261          # sys.last_* because especially last_traceback keeps              # anymore.
262          # indirect references to all objects bound to local              dlg = wxScrolledMessageDialog(None, message,
263          # variables and this might prevent some object from being                                          "Thuban: Internal Error")
264          # collected early enough.              dlg.ShowModal()
265          sys.last_type = sys.last_value = sys.last_traceback = None              dlg.Destroy()
266    
267            finally:
268                self.in_exception_dialog = 0
269                # delete the last exception info that python keeps in
270                # sys.last_* because especially last_traceback keeps
271                # indirect references to all objects bound to local
272                # variables and this might prevent some object from being
273                # collected early enough.
274                sys.last_type = sys.last_value = sys.last_traceback = None
275    
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