/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 1704 by jan, Wed Sep 3 07:02:36 2003 UTC revision 2446 by frank, Mon Dec 13 11:52:34 2004 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001, 2002, 2003 by Intevation GmbH  # Copyright (C) 2001, 2002, 2003, 2004 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
# Line 34  import view Line 34  import view
34  import tree  import tree
35  import mainwindow  import mainwindow
36  import dbdialog  import dbdialog
37    import altpathdialog
38  import exceptiondialog  import exceptiondialog
39    
40  from messages import SESSION_REPLACED  from messages import SESSION_REPLACED
# Line 51  class ThubanApplication(wxApp, Publisher Line 52  class ThubanApplication(wxApp, Publisher
52    
53      def OnInit(self):      def OnInit(self):
54          sys.excepthook = self.ShowExceptionDialog          sys.excepthook = self.ShowExceptionDialog
55    
56            # Initialize instance variables before trying to create any
57            # windows.  Creating windows can start an event loop if
58            # e.g. message boxes are popped up for some reason, and event
59            # handlers, especially EVT_UPDATE_UI may want to access things
60            # from the application.
61    
62            # Defaults for the directories used in file dialogs
63            self.path={"data":".", "projection":".", "alt_path":""}
64    
65            self.session = None
66            self.top = None
67            self.create_session()
68    
69            # Create an optional splash screen and then the mainwindow
70          self.splash = self.splash_screen()          self.splash = self.splash_screen()
71          if self.splash is not None:          if self.splash is not None:
72              self.splash.Show()              self.splash.Show()
73          self.read_startup_files()          self.read_startup_files()
74          self.top = self.CreateMainWindow()          self.top = self.CreateMainWindow()
75            # The session was alredy created above and we need to get the
76            # map into the mainwindow.  maps_changed does that.
77            self.maps_changed()
78          self.SetTopWindow(self.top)          self.SetTopWindow(self.top)
79          if self.splash is None:          if self.splash is None:
80              self.ShowMainWindow()              self.ShowMainWindow()
81          self.session = None  
         self.create_session()  
82          return True          return True
83    
84      def OnExit(self):      def OnExit(self):
# Line 164  class ThubanApplication(wxApp, Publisher Line 182  class ThubanApplication(wxApp, Publisher
182              self.unsubscribe_session(oldsession)              self.unsubscribe_session(oldsession)
183              oldsession.Destroy()              oldsession.Destroy()
184    
185        def SetPath(self, group, filename):
186            """Store the application's default path for file dialogs extracted
187            from a given filename.
188            """
189            self.path[group] = os.path.dirname( filename )
190    
191        def Path(self, group):
192            """Return the application's default path for file dialogs."""
193            return self.path[group]
194    
195      def subscribe_session(self, session):      def subscribe_session(self, session):
196          """Subscribe to some of the sessions channels.          """Subscribe to some of the sessions channels.
197    
# Line 190  class ThubanApplication(wxApp, Publisher Line 218  class ThubanApplication(wxApp, Publisher
218          """          """
219          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
220    
221      def OpenSession(self, filename, db_connection_callback = None):      def OpenSession(self, filename, db_connection_callback = None,
222                                        shapefile_callback = None):
223          """Open the session in the file named filename"""          """Open the session in the file named filename"""
224          # Make sure we deal with an absolute pathname. Otherwise we can          # Make sure we deal with an absolute pathname. Otherwise we can
225          # get problems when saving because the saving code expects an          # get problems when saving because the saving code expects an
# Line 198  class ThubanApplication(wxApp, Publisher Line 227  class ThubanApplication(wxApp, Publisher
227          filename = os.path.abspath(filename)          filename = os.path.abspath(filename)
228          if db_connection_callback is None:          if db_connection_callback is None:
229              db_connection_callback = self.run_db_param_dialog              db_connection_callback = self.run_db_param_dialog
230            if shapefile_callback is None:
231                shapefile_callback = self.run_alt_path_dialog
232          try:          try:
233              session = load_session(filename,              session = load_session(filename,
234                                 db_connection_callback=db_connection_callback)                                 db_connection_callback=db_connection_callback,
235                                   shapefile_callback=shapefile_callback)
236          except LoadCancelled:          except LoadCancelled:
237              return              return
238          session.SetFilename(filename)          session.SetFilename(filename)
# Line 229  class ThubanApplication(wxApp, Publisher Line 261  class ThubanApplication(wxApp, Publisher
261                                  parameters, message)                                  parameters, message)
262          return dlg.RunDialog()          return dlg.RunDialog()
263    
264        # run_alt_path_dialog: Raise a dialog to ask for an alternative path
265        # if the shapefile couldn't be found.
266        # TODO:
267        #   - Store a list of already used alternative paths and return these
268        #     iteratively (using a generator)
269        #   - How do we interact with the user to tell him we used a different
270        #     shapefile (location), mode "check"? The current approach with the
271        #     file dialog is not that comfortable.
272        #
273        def run_alt_path_dialog(self, filename, mode = None, second_try = 0):
274            """Implemetation of the shapefile_callback while loading sessions.
275            
276               This implements two modes:
277               - search: Search for an alternative path. If available from a
278                 list of alrady known paths, else interactivly by file dialog.
279                 Currently the "second_try" is important since else the user might
280                 be caught in a loop.
281               - check: Ask the user for confirmation, if a path from list has
282                 been found successful.
283    
284               Returns:
285               - fname: The full path to the (shape) file.
286               - from_list: Flags if the path was taken from list or entered
287                 manually.
288            """
289    
290            if mode == "search":
291                if self.Path('alt_path') == "" or second_try:
292                    dlg = altpathdialog.AltPathFileDialog(filename)
293                    fname = dlg.RunDialog()
294                    if fname is not None:
295                        self.SetPath('alt_path', fname)    
296                    from_list = 0
297                else:
298                    fname = os.path.join(self.Path('alt_path'),
299                                         os.path.basename(filename))
300                    from_list = 1
301            elif mode == "check":
302                    dlg = altpathdialog.AltPathConfirmDialog(filename)
303                    fname = dlg.RunDialog()
304                    if fname is not None:
305                        self.SetPath('alt_path', fname)
306                    from_list = 0
307            else:
308                fname = None
309                from_list = 0
310            return fname, from_list
311    
312    
313      def SaveSession(self):      def SaveSession(self):
314          save_session(self.session, self.session.filename)          save_session(self.session, self.session.filename)
315    
316      def maps_changed(self, *args):      def maps_changed(self, *args):
317          if self.session.HasMaps():          """Subscribed to the session's MAPS_CHANGED messages.
318              self.top.SetMap(self.session.Maps()[0])  
319          else:          Set the toplevel window's map to the map in the session. This is
320              self.top.SetMap(None)          done by calling the window's SetMap method with the map as
321            argument. If the session doesn't have any maps None is used
322            instead.
323    
324            Currently Thuban can only really handle at most one map in a
325            sessions so the first map in the session's list of maps as
326            returned by the Maps method is used.
327            """
328            # The mainwindow may not have been created yet, so check whether
329            # it has been created before calling any of its methods
330            if self.top is not None:
331                if self.session.HasMaps():
332                    self.top.SetMap(self.session.Maps()[0])
333                else:
334                    self.top.SetMap(None)
335    
336      in_exception_dialog = 0 # flag: are we already inside the exception dialog?      in_exception_dialog = 0 # flag: are we already inside the exception dialog?
337    
# Line 259  class ThubanApplication(wxApp, Publisher Line 353  class ThubanApplication(wxApp, Publisher
353          try:          try:
354              lines = traceback.format_exception(exc_type, exc_value,              lines = traceback.format_exception(exc_type, exc_value,
355                                              exc_traceback)                                              exc_traceback)
356              message = _("An unhandled exception occurred:\n%s\n") % exc_value+\              message = _("An unhandled exception occurred:\n%s\n"
357                      _("(please report to") +\                          "(please report to"
358                      " http://thuban.intevation.org/bugtracker.html)"\                          " http://thuban.intevation.org/bugtracker.html)"
359                      "\n\n\n"+\                          "\n\n%s") % (exc_value, "".join(lines))
                     "".join(lines)  
360              print message              print message
361    
362              # We don't use an explicit parent here because this method might              # We don't use an explicit parent here because this method might
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