/[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 1654 by bh, Mon Aug 25 16:05:21 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 34  import Thuban.Model.resource Line 34  import Thuban.Model.resource
34  import view  import view
35  import tree  import tree
36  import mainwindow  import mainwindow
37    import dbdialog
38    
39  from messages import SESSION_REPLACED  from messages import SESSION_REPLACED
40    
41    
   
42  class ThubanApplication(wxApp, Publisher):  class ThubanApplication(wxApp, Publisher):
43    
44      """      """
# Line 50  class ThubanApplication(wxApp, Publisher Line 50  class ThubanApplication(wxApp, Publisher
50      """      """
51    
52      def OnInit(self):      def OnInit(self):
53            sys.excepthook = self.ShowExceptionDialog
54          self.splash = self.splash_screen()          self.splash = self.splash_screen()
55          if self.splash is not None:          if self.splash is not None:
56              self.splash.Show()              self.splash.Show()
# Line 189  class ThubanApplication(wxApp, Publisher Line 190  class ThubanApplication(wxApp, Publisher
190          """          """
191          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
192    
193      def OpenSession(self, filename):      def OpenSession(self, filename, db_connection_callback = None):
194          """Open the session in the file named filename"""          """Open the session in the file named filename"""
195          # Make sure we deal with an absolute pathname. Otherwise we can          # Make sure we deal with an absolute pathname. Otherwise we can
196          # get problems when saving because the saving code expects an          # get problems when saving because the saving code expects an
197          # absolute directory name          # absolute directory name
198          filename = os.path.abspath(filename)          filename = os.path.abspath(filename)
199          session = load_session(filename)          if db_connection_callback is None:
200                db_connection_callback = self.run_db_param_dialog
201            try:
202                session = load_session(filename,
203                                   db_connection_callback=db_connection_callback)
204            except LoadCancelled:
205                return
206          session.SetFilename(filename)          session.SetFilename(filename)
207          session.UnsetModified()          session.UnsetModified()
208          self.SetSession(session)          self.SetSession(session)
# Line 204  class ThubanApplication(wxApp, Publisher Line 211  class ThubanApplication(wxApp, Publisher
211              for layer in map.Layers():              for layer in map.Layers():
212                  if isinstance(layer, RasterLayer) \                  if isinstance(layer, RasterLayer) \
213                      and not Thuban.Model.resource.has_gdal_support():                      and not Thuban.Model.resource.has_gdal_support():
214                      msg = _("The current session contains Image layers,\n" +                      msg = _("The current session contains Image layers,\n"
215                              "but the GDAL library is not available to " +                              "but the GDAL library is not available to "
216                              "draw them.")                              "draw them.")
217                      dlg = wx.wxMessageDialog(None,                      dlg = wx.wxMessageDialog(None,
218                                               msg,                                               msg,
219                                               _("Library not available"),                                               _("Library not available"),
220                                               wx.wxOK | wx.wxICON_INFORMATION)                                               wx.wxOK | wx.wxICON_INFORMATION)
221                      print msg                      print msg
# Line 216  class ThubanApplication(wxApp, Publisher Line 223  class ThubanApplication(wxApp, Publisher
223                      dlg.Destroy()                      dlg.Destroy()
224                      break                      break
225    
226        def run_db_param_dialog(self, parameters, message):
227            """Implementation of the db_connection_callback for loading sessions"""
228            dlg = dbdialog.DBDialog(None, _("DB Connection Parameters"),
229                                    parameters, message)
230            return dlg.RunDialog()
231    
232    
233      def SaveSession(self):      def SaveSession(self):
234          save_session(self.session, self.session.filename)          save_session(self.session, self.session.filename)
235    
# Line 225  class ThubanApplication(wxApp, Publisher Line 239  class ThubanApplication(wxApp, Publisher
239          else:          else:
240              self.top.SetMap(None)              self.top.SetMap(None)
241    
242  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.  
243    
244      The parameters are the usual values describing an exception in      def ShowExceptionDialog(self, exc_type, exc_value, exc_traceback):
245      Python, the exception type, the value and the traceback.          """Show a message box with information about an exception.
246        
247      This method can be used as a value for the sys.excepthook.          The parameters are the usual values describing an exception in
248      """          Python, the exception type, the value and the traceback.
249      global in_exception_dialog      
250            This method can be used as a value for the sys.excepthook.
251            """
252    
253      if in_exception_dialog:          if self.in_exception_dialog:
254          return              return
255      in_exception_dialog = 1          self.in_exception_dialog = 1
256      while wxIsBusy():          while wxIsBusy():
257          wxEndBusyCursor() # reset the mouse cursor              wxEndBusyCursor() # reset the mouse cursor
258    
259      try:          try:
260          lines = traceback.format_exception(exc_type, exc_value,              lines = traceback.format_exception(exc_type, exc_value,
261                                             exc_traceback)                                              exc_traceback)
262          message = "An unhandled exception occurred:\n%s\n" % exc_value+\              message = "An unhandled exception occurred:\n%s\n" % exc_value+\
263                    "(please report to " \                      "(please report to " \
264                    "http://thuban.intevation.org/bugtracker.html)"\                      "http://thuban.intevation.org/bugtracker.html)"\
265                    "\n\n\n"+\                      "\n\n\n"+\
266                    "".join(lines)                      "".join(lines)
267          print message              print message
268    
269          # We don't use an explicit parent here because this method might              # We don't use an explicit parent here because this method might
270          # be called in circumstances where the main window doesn't exist              # be called in circumstances where the main window doesn't exist
271          # anymore.              # anymore.
272          dlg = wxScrolledMessageDialog(None, message,              dlg = wxScrolledMessageDialog(None, message,
273                                        "Thuban: Internal Error")                                          "Thuban: Internal Error")
274          dlg.ShowModal()              dlg.ShowModal()
275          dlg.Destroy()              dlg.Destroy()
276    
277      finally:          finally:
278          in_exception_dialog = 0              self.in_exception_dialog = 0
279          # delete the last exception info that python keeps in              # delete the last exception info that python keeps in
280          # sys.last_* because especially last_traceback keeps              # sys.last_* because especially last_traceback keeps
281          # indirect references to all objects bound to local              # indirect references to all objects bound to local
282          # variables and this might prevent some object from being              # variables and this might prevent some object from being
283          # collected early enough.              # collected early enough.
284          sys.last_type = sys.last_value = sys.last_traceback = None              sys.last_type = sys.last_value = sys.last_traceback = None
285    
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