/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 1133 by frank, Thu Jun 5 13:27:33 2003 UTC revision 1504 by jonathan, Tue Jul 29 14:28:55 2003 UTC
# Line 14  __version__ = "$Revision$" Line 14  __version__ = "$Revision$"
14    
15  import sys, os  import sys, os
16  import os.path  import os.path
 from tempfile import mktemp  
17    
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
25    
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
30  from Thuban.Model.messages import MAPS_CHANGED  from Thuban.Model.messages import MAPS_CHANGED
31    from Thuban.Model.layer import RasterLayer
32    import Thuban.Model.resource
33    
34  import view  import view
35  import tree  import tree
# Line 35  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 47  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
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 71  class ThubanApplication(wxApp, Publisher Line 74  class ThubanApplication(wxApp, Publisher
74      def read_startup_files(self):      def read_startup_files(self):
75          """Read the startup files."""          """Read the startup files."""
76          # for now the startup file is ~/.thuban/thubanstart.py          # for now the startup file is ~/.thuban/thubanstart.py
77          if os.name == 'nt':          dir = get_application_dir()
             # This should result in something like the user directory ...  
             guess = os.path.dirname(os.path.dirname(os.path.dirname(mktemp())))  
             dir = os.path.join(guess, ".thuban")  
             if not os.path.isdir(dir):  
                 os.mkdir(dir)  
         else:  
             dir =os.path.expanduser("~/.thuban")  
78          if os.path.isdir(dir):          if os.path.isdir(dir):
79              sys.path.append(dir)              sys.path.append(dir)
80              try:              try:
# Line 204  class ThubanApplication(wxApp, Publisher Line 200  class ThubanApplication(wxApp, Publisher
200          session.UnsetModified()          session.UnsetModified()
201          self.SetSession(session)          self.SetSession(session)
202    
203            for map in session.Maps():
204                for layer in map.Layers():
205                    if isinstance(layer, RasterLayer) \
206                        and not Thuban.Model.resource.has_gdal_support():
207                        msg = _("The current session contains Image layers,\n" +
208                                "but the GDAL library is not available to " +
209                                "draw them.")
210                        dlg = wx.wxMessageDialog(None,
211                                                 msg,
212                                                 _("Library not available"),
213                                                 wx.wxOK | wx.wxICON_INFORMATION)
214                        print msg
215                        dlg.ShowModal()
216                        dlg.Destroy()
217                        break
218    
219      def SaveSession(self):      def SaveSession(self):
220          save_session(self.session, self.session.filename)          save_session(self.session, self.session.filename)
221    
# Line 212  class ThubanApplication(wxApp, Publisher Line 224  class ThubanApplication(wxApp, Publisher
224              self.top.SetMap(self.session.Maps()[0])              self.top.SetMap(self.session.Maps()[0])
225          else:          else:
226              self.top.SetMap(None)              self.top.SetMap(None)
227    
228    in_exception_dialog = 0 # flag: are we already inside the exception dialog?
229    
230    def show_exception_dialog(exc_type, exc_value, exc_traceback):
231        """Show a message box with information about an exception.
232    
233        The parameters are the usual values describing an exception in
234        Python, the exception type, the value and the traceback.
235    
236        This method can be used as a value for the sys.excepthook.
237        """
238        global in_exception_dialog
239    
240        if in_exception_dialog:
241            return
242        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            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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