/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 1504 by jonathan, Tue Jul 29 14:28:55 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 49  class ThubanApplication(wxApp, Publisher Line 49  class ThubanApplication(wxApp, Publisher
49      """      """
50    
51      def OnInit(self):      def OnInit(self):
52          sys.excepthook = show_exception_dialog          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?
233    
234  def show_exception_dialog(exc_type, exc_value, exc_traceback):      def ShowExceptionDialog(self, exc_type, exc_value, exc_traceback):
235      """Show a message box with information about an exception.          """Show a message box with information about an exception.
236        
237      The parameters are the usual values describing an exception in          The parameters are the usual values describing an exception in
238      Python, the exception type, the value and the traceback.          Python, the exception type, the value and the traceback.
239        
240      This method can be used as a value for the sys.excepthook.          This method can be used as a value for the sys.excepthook.
241      """          """
242      global in_exception_dialog  
243            if self.in_exception_dialog:
244      if in_exception_dialog:              return
245          return          self.in_exception_dialog = 1
246      in_exception_dialog = 1          while wxIsBusy():
247      while wxIsBusy():              wxEndBusyCursor() # reset the mouse cursor
248          wxEndBusyCursor() # reset the mouse cursor  
249            try:
250      try:              lines = traceback.format_exception(exc_type, exc_value,
251          lines = traceback.format_exception(exc_type, exc_value,                                              exc_traceback)
252                                             exc_traceback)              message = "An unhandled exception occurred:\n%s\n" % exc_value+\
253          message = "An unhandled exception occurred:\n%s\n" % exc_value+\                      "(please report to " \
254                    "(please report to " \                      "http://thuban.intevation.org/bugtracker.html)"\
255                    "http://thuban.intevation.org/bugtracker.html)"\                      "\n\n\n"+\
256                    "\n\n\n"+\                      "".join(lines)
257                    "".join(lines)              print message
258          print message  
259                # We don't use an explicit parent here because this method might
260          # We don't use an explicit parent here because this method might              # be called in circumstances where the main window doesn't exist
261          # be called in circumstances where the main window doesn't exist              # anymore.
262          # anymore.              dlg = wxScrolledMessageDialog(None, message,
263          dlg = wxScrolledMessageDialog(None, message,                                          "Thuban: Internal Error")
264                                        "Thuban: Internal Error")              dlg.ShowModal()
265          dlg.ShowModal()              dlg.Destroy()
266          dlg.Destroy()  
267            finally:
268      finally:              self.in_exception_dialog = 0
269          in_exception_dialog = 0              # delete the last exception info that python keeps in
270          # delete the last exception info that python keeps in              # sys.last_* because especially last_traceback keeps
271          # sys.last_* because especially last_traceback keeps              # indirect references to all objects bound to local
272          # indirect references to all objects bound to local              # variables and this might prevent some object from being
273          # variables and this might prevent some object from being              # collected early enough.
274          # collected early enough.              sys.last_type = sys.last_value = sys.last_traceback = None
         sys.last_type = sys.last_value = sys.last_traceback = None  
275    
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