/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 251 by bh, Tue Jul 30 14:18:40 2002 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 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 26  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 40  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 60  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 86  class ThubanApplication(wxApp, Publisher Line 79  class ThubanApplication(wxApp, Publisher
79                      if tb.tb_next is not None:                      if tb.tb_next is not None:
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.
87                          sys.stderr.write("No thubanstart module available\n")                          sys.stderr.write(_("No thubanstart module available\n"))
88                  finally:                  finally:
89                      # make sure we delete the traceback object,                      # make sure we delete the traceback object,
90                      # otherwise there's be circular references involving                      # otherwise there's be circular references involving
91                      # the current stack frame                      # the current stack frame
92                      del tb                      del tb
93              except:              except:
94                  sys.stderr.write("Cannot import the thubanstart module\n")                  sys.stderr.write(_("Cannot import the thubanstart module\n"))
95                  traceback.print_exc(None, sys.stderr)                  traceback.print_exc(None, sys.stderr)
96          else:          else:
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.
# Line 110  class ThubanApplication(wxApp, Publisher Line 129  class ThubanApplication(wxApp, Publisher
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.
132            """
133          when this method is called by OnInit self.interactor (to be used          msg = (_("This is the wxPython-based Graphical User Interface"
134          for the interactor argument of the standard Thuban main window                 " for exploring geographic data"))
135          class) has already been instantiated.          return mainwindow.MainWindow(NULL, -1, "Thuban", self, None,
         """  
         msg = ("This is the wxPython-based Graphical User Interface"  
                " for exploring geographic data")  
         return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,  
136                                       initial_message = msg)                                       initial_message = msg)
137    
138      def Session(self):      def Session(self):
# Line 127  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 135  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 169  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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