/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 242 by bh, Wed Jul 24 17:16:31 2002 UTC revision 503 by jonathan, Mon Mar 10 15:12:09 2003 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001, 2002 by Intevation GmbH  # Copyright (C) 2001, 2002, 2003 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 19  from wxPython.wx import * Line 19  from wxPython.wx import *
19    
20  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
21    
22    from Thuban import _
23  from Thuban.Model.session import create_empty_session  from Thuban.Model.session import create_empty_session
24  from Thuban.Model.save import save_session  from Thuban.Model.save import save_session
25  from Thuban.Model.load import load_session  from Thuban.Model.load import load_session
# Line 29  import tree Line 30  import tree
30  from interactor import Interactor  from interactor import Interactor
31  import mainwindow  import mainwindow
32    
33  from messages import SESSION_CHANGED  from messages import SESSION_REPLACED
34    
35    
36    
# Line 44  class ThubanApplication(wxApp, Publisher Line 45  class ThubanApplication(wxApp, Publisher
45      """      """
46    
47      def OnInit(self):      def OnInit(self):
48            self.splash = self.splash_screen()
49            if self.splash is not None:
50                self.splash.Show()
51          self.read_startup_files()          self.read_startup_files()
52          self.interactor = Interactor(None)          self.interactor = Interactor(None)
53          top = self.CreateMainWindow()          self.top = self.CreateMainWindow()
54          top.Show(true)          self.SetTopWindow(self.top)
55          self.top = top          if self.splash is None:
56          self.SetTopWindow(top)              self.ShowMainWindow()
57          self.session = None          self.session = None
58          self.create_session()          self.create_session()
59          return true          return true
60    
61        def OnExit(self):
62            """Clean up code.
63    
64            Extend this in derived classes if needed.
65            """
66            self.session.Destroy()
67            self.interactor.Destroy()
68            Publisher.Destroy(self)
69    
70        def MainLoop(self):
71            """Call the inherited MainLoop method and then call OnExit.
72    
73            In wxPython OnExit isn't called automatically, unfortunately, so
74            we do it here.
75            """
76            wxApp.MainLoop(self)
77            self.OnExit()
78    
79      def read_startup_files(self):      def read_startup_files(self):
80          """Read the startup files."""          """Read the startup files."""
81          # for now the startup file is ~/.thuban/thubanstart.py          # for now the startup file is ~/.thuban/thubanstart.py
# Line 68  class ThubanApplication(wxApp, Publisher Line 90  class ThubanApplication(wxApp, Publisher
90                      if tb.tb_next is not None:                      if tb.tb_next is not None:
91                          # The ImportError exception was raised from                          # The ImportError exception was raised from
92                          # inside the thubanstart module.                          # inside the thubanstart module.
93                          sys.stderr.write("Cannot import the thubanstart"                          sys.stderr.write(_("Cannot import the thubanstart"
94                                           "module\n")                                           "module\n"))
95                          traceback.print_exc(None, sys.stderr)                          traceback.print_exc(None, sys.stderr)
96                      else:                      else:
97                          # There's no thubanstart module.                          # There's no thubanstart module.
98                          sys.stderr.write("No thubanstart module available\n")                          sys.stderr.write(_("No thubanstart module available\n"))
99                  finally:                  finally:
100                      # make sure we delete the traceback object,                      # make sure we delete the traceback object,
101                      # otherwise there's be circular references involving                      # otherwise there's be circular references involving
102                      # the current stack frame                      # the current stack frame
103                      del tb                      del tb
104              except:              except:
105                  sys.stderr.write("Cannot import the thubanstart module\n")                  sys.stderr.write(_("Cannot import the thubanstart module\n"))
106                  traceback.print_exc(None, sys.stderr)                  traceback.print_exc(None, sys.stderr)
107          else:          else:
108              # There's no .thuban directory              # There's no .thuban directory
109              sys.stderr.write("No ~/.thuban directory\n")              sys.stderr.write(_("No ~/.thuban directory\n"))
110    
111        def splash_screen(self):
112            """Create and return a splash screen.
113    
114            This method is called by OnInit to determine whether the
115            application should have a splashscreen. If the application
116            should display a splash screen override this method in a derived
117            class and have it create and return the wxSplashScreen instance.
118            The implementation of this method in the derived class should
119            also arranged for ShowMainWindow to be called.
120    
121            The default implementation simply returns None so that no splash
122            screen is shown and ShowMainWindow will be called automatically.
123            """
124            return None
125    
126        def ShowMainWindow(self):
127            """Show the main window
128    
129            Normally this method is automatically called by OnInit to show
130            the main window. However, if the splash_screen method has
131            returned a splashscreen it is expected that the derived class
132            also arranges for ShowMainWindow to be called at the appropriate
133            time.
134            """
135            self.top.Show(true)
136          
137      def CreateMainWindow(self):      def CreateMainWindow(self):
138          """Create and return the main window for the application.          """Create and return the main window for the application.
139    
# Line 97  class ThubanApplication(wxApp, Publisher Line 145  class ThubanApplication(wxApp, Publisher
145          for the interactor argument of the standard Thuban main window          for the interactor argument of the standard Thuban main window
146          class) has already been instantiated.          class) has already been instantiated.
147          """          """
148          msg = ("This is the wxPython-based Graphical User Interface"          msg = (_("This is the wxPython-based Graphical User Interface"
149                 " for exploring geographic data")                 " for exploring geographic data"))
150          return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,          return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,
151                                       initial_message = msg)                                       initial_message = msg)
152    
# Line 109  class ThubanApplication(wxApp, Publisher Line 157  class ThubanApplication(wxApp, Publisher
157      def SetSession(self, session):      def SetSession(self, session):
158          """Make session the new session.          """Make session the new session.
159    
160          Issue SESSION_CHANGED after self.session has become the new          Issue SESSION_REPLACED after self.session has become the new
161          session. After the session has been assigned call          session. After the session has been assigned call
162          self.subscribe_session() with the new session and          self.subscribe_session() with the new session and
163          self.unsubscribe_session with the old one.          self.unsubscribe_session with the old one.
# Line 117  class ThubanApplication(wxApp, Publisher Line 165  class ThubanApplication(wxApp, Publisher
165          oldsession = self.session          oldsession = self.session
166          self.session = session          self.session = session
167          self.subscribe_session(self.session)          self.subscribe_session(self.session)
168          self.issue(SESSION_CHANGED)          self.issue(SESSION_REPLACED)
169          self.interactor.SetSession(session)          self.interactor.SetSession(session)
170          self.maps_changed()          self.maps_changed()
171          if oldsession is not None:          if oldsession is not None:
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