/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 374 by jan, Mon Jan 27 14:20:02 2003 UTC revision 765 by bh, Tue Apr 29 12:42:14 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 27  from Thuban.Model.messages import MAPS_C Line 27  from Thuban.Model.messages import MAPS_C
27    
28  import view  import view
29  import tree  import tree
 from interactor import Interactor  
30  import mainwindow  import mainwindow
31    
32  from messages import SESSION_CHANGED  from messages import SESSION_REPLACED
33    
34    
35    
# Line 41  class ThubanApplication(wxApp, Publisher Line 40  class ThubanApplication(wxApp, Publisher
40    
41      All wxWindows programs have to have an instance of an application      All wxWindows programs have to have an instance of an application
42      class derived from wxApp. In Thuban the application class holds      class derived from wxApp. In Thuban the application class holds
43      references to the main window, the session and the interactor.      references to the main window and the session.
44      """      """
45    
46      def OnInit(self):      def OnInit(self):
47            self.splash = self.splash_screen()
48            if self.splash is not None:
49                self.splash.Show()
50          self.read_startup_files()          self.read_startup_files()
51          self.interactor = Interactor(None)          self.top = self.CreateMainWindow()
52          top = self.CreateMainWindow()          self.SetTopWindow(self.top)
53          top.Show(true)          if self.splash is None:
54          self.top = top              self.ShowMainWindow()
         self.SetTopWindow(top)  
55          self.session = None          self.session = None
56          self.create_session()          self.create_session()
57          return true          return True
58    
59      def OnExit(self):      def OnExit(self):
60          """Clean up code.          """Clean up code.
# Line 61  class ThubanApplication(wxApp, Publisher Line 62  class ThubanApplication(wxApp, Publisher
62          Extend this in derived classes if needed.          Extend this in derived classes if needed.
63          """          """
64          self.session.Destroy()          self.session.Destroy()
65          self.interactor.Destroy()          self.session = None
66          Publisher.Destroy(self)          Publisher.Destroy(self)
67    
     def MainLoop(self):  
         """Call the inherited MainLoop method and then call OnExit.  
   
         In wxPython OnExit isn't called automatically, unfortunately, so  
         we do it here.  
         """  
         wxApp.MainLoop(self)  
         self.OnExit()  
   
68      def read_startup_files(self):      def read_startup_files(self):
69          """Read the startup files."""          """Read the startup files."""
70          # for now the startup file is ~/.thuban/thubanstart.py          # for now the startup file is ~/.thuban/thubanstart.py
# Line 88  class ThubanApplication(wxApp, Publisher Line 80  class ThubanApplication(wxApp, Publisher
80                          # The ImportError exception was raised from                          # The ImportError exception was raised from
81                          # inside the thubanstart module.                          # inside the thubanstart module.
82                          sys.stderr.write(_("Cannot import the thubanstart"                          sys.stderr.write(_("Cannot import the thubanstart"
83                                           "module\n"))                                           " module\n"))
84                          traceback.print_exc(None, sys.stderr)                          traceback.print_exc(None, sys.stderr)
85                      else:                      else:
86                          # There's no thubanstart module.                          # There's no thubanstart module.
# Line 105  class ThubanApplication(wxApp, Publisher Line 97  class ThubanApplication(wxApp, Publisher
97              # There's no .thuban directory              # There's no .thuban directory
98              sys.stderr.write(_("No ~/.thuban directory\n"))              sys.stderr.write(_("No ~/.thuban directory\n"))
99    
100        def splash_screen(self):
101            """Create and return a splash screen.
102    
103            This method is called by OnInit to determine whether the
104            application should have a splashscreen. If the application
105            should display a splash screen override this method in a derived
106            class and have it create and return the wxSplashScreen instance.
107            The implementation of this method in the derived class should
108            also arranged for ShowMainWindow to be called.
109    
110            The default implementation simply returns None so that no splash
111            screen is shown and ShowMainWindow will be called automatically.
112            """
113            return None
114    
115        def ShowMainWindow(self):
116            """Show the main window
117    
118            Normally this method is automatically called by OnInit to show
119            the main window. However, if the splash_screen method has
120            returned a splashscreen it is expected that the derived class
121            also arranges for ShowMainWindow to be called at the appropriate
122            time.
123            """
124            self.top.Show(True)
125    
126      def CreateMainWindow(self):      def CreateMainWindow(self):
127          """Create and return the main window for the application.          """Create and return the main window for the application.
128    
129          Override this in subclasses to instantiate the Thuban mainwindow          Override this in subclasses to instantiate the Thuban mainwindow
130          with different parameters or to use a different class for the          with different parameters or to use a different class for the
131          main window.          main window.
   
         when this method is called by OnInit self.interactor (to be used  
         for the interactor argument of the standard Thuban main window  
         class) has already been instantiated.  
132          """          """
133          msg = (_("This is the wxPython-based Graphical User Interface"          msg = (_("This is the wxPython-based Graphical User Interface"
134                 " for exploring geographic data"))                 " for exploring geographic data"))
135          return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,          return mainwindow.MainWindow(NULL, -1, "Thuban", self, None,
136                                       initial_message = msg)                                       initial_message = msg)
137    
138      def Session(self):      def Session(self):
# Line 128  class ThubanApplication(wxApp, Publisher Line 142  class ThubanApplication(wxApp, Publisher
142      def SetSession(self, session):      def SetSession(self, session):
143          """Make session the new session.          """Make session the new session.
144    
145          Issue SESSION_CHANGED after self.session has become the new          Issue SESSION_REPLACED after self.session has become the new
146          session. After the session has been assigned call          session. After the session has been assigned call
147          self.subscribe_session() with the new session and          self.subscribe_session() with the new session and
148          self.unsubscribe_session with the old one.          self.unsubscribe_session with the old one.
# Line 136  class ThubanApplication(wxApp, Publisher Line 150  class ThubanApplication(wxApp, Publisher
150          oldsession = self.session          oldsession = self.session
151          self.session = session          self.session = session
152          self.subscribe_session(self.session)          self.subscribe_session(self.session)
153          self.issue(SESSION_CHANGED)          self.issue(SESSION_REPLACED)
         self.interactor.SetSession(session)  
154          self.maps_changed()          self.maps_changed()
155          if oldsession is not None:          if oldsession is not None:
156              self.unsubscribe_session(oldsession)              self.unsubscribe_session(oldsession)
# Line 170  class ThubanApplication(wxApp, Publisher Line 183  class ThubanApplication(wxApp, Publisher
183          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
184    
185      def OpenSession(self, filename):      def OpenSession(self, filename):
186            """Open the session in the file named filename"""
187            # Make sure we deal with an absolute pathname. Otherwise we can
188            # get problems when saving because the saving code expects an
189            # absolute directory name
190            filename = os.path.abspath(filename)
191          session = load_session(filename)          session = load_session(filename)
192          session.SetFilename(filename)          session.SetFilename(filename)
193          session.UnsetModified()          session.UnsetModified()
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