/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 1162 by jonathan, Thu Jun 12 12:41:16 2003 UTC revision 1648 by bh, Mon Aug 25 13:55:35 2003 UTC
# Line 18  import os.path Line 18  import os.path
18  import traceback  import traceback
19    
20  from wxPython.wx import *  from wxPython.wx import *
21    from wxPython.lib.dialogs import wxScrolledMessageDialog
22    
23  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
24  from Thuban.Lib.fileutil import get_application_dir  from Thuban.Lib.fileutil import get_application_dir
# Line 37  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 49  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 188  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)          session = load_session(filename,
199                                   db_connection_callback = db_connection_callback)
200          session.SetFilename(filename)          session.SetFilename(filename)
201          session.UnsetModified()          session.UnsetModified()
202          self.SetSession(session)          self.SetSession(session)
# Line 203  class ThubanApplication(wxApp, Publisher Line 205  class ThubanApplication(wxApp, Publisher
205              for layer in map.Layers():              for layer in map.Layers():
206                  if isinstance(layer, RasterLayer) \                  if isinstance(layer, RasterLayer) \
207                      and not Thuban.Model.resource.has_gdal_support():                      and not Thuban.Model.resource.has_gdal_support():
208                      msg = _("The current session contains Image layers,\n" +                      msg = _("The current session contains Image layers,\n"
209                              "but the GDAL library is not available to " +                              "but the GDAL library is not available to "
210                              "draw them.")                              "draw them.")
211                      dlg = wx.wxMessageDialog(None,                      dlg = wx.wxMessageDialog(None,
212                                               msg,                                               msg,
213                                               _("Library not available"),                                               _("Library not available"),
214                                               wx.wxOK | wx.wxICON_INFORMATION)                                               wx.wxOK | wx.wxICON_INFORMATION)
215                      print msg                      print msg
# Line 223  class ThubanApplication(wxApp, Publisher Line 225  class ThubanApplication(wxApp, Publisher
225              self.top.SetMap(self.session.Maps()[0])              self.top.SetMap(self.session.Maps()[0])
226          else:          else:
227              self.top.SetMap(None)              self.top.SetMap(None)
228    
229        in_exception_dialog = 0 # flag: are we already inside the exception dialog?
230    
231        def ShowExceptionDialog(self, exc_type, exc_value, exc_traceback):
232            """Show a message box with information about an exception.
233        
234            The parameters are the usual values describing an exception in
235            Python, the exception type, the value and the traceback.
236        
237            This method can be used as a value for the sys.excepthook.
238            """
239    
240            if self.in_exception_dialog:
241                return
242            self.in_exception_dialog = 1
243            while wxIsBusy():
244                wxEndBusyCursor() # reset the mouse cursor
245    
246            try:
247                lines = traceback.format_exception(exc_type, exc_value,
248                                                exc_traceback)
249                message = "An unhandled exception occurred:\n%s\n" % exc_value+\
250                        "(please report to " \
251                        "http://thuban.intevation.org/bugtracker.html)"\
252                        "\n\n\n"+\
253                        "".join(lines)
254                print message
255    
256                # We don't use an explicit parent here because this method might
257                # be called in circumstances where the main window doesn't exist
258                # anymore.
259                dlg = wxScrolledMessageDialog(None, message,
260                                            "Thuban: Internal Error")
261                dlg.ShowModal()
262                dlg.Destroy()
263    
264            finally:
265                self.in_exception_dialog = 0
266                # delete the last exception info that python keeps in
267                # sys.last_* because especially last_traceback keeps
268                # indirect references to all objects bound to local
269                # variables and this might prevent some object from being
270                # collected early enough.
271                sys.last_type = sys.last_value = sys.last_traceback = None
272    
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