/[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 699 by bh, Thu Apr 17 15:20:14 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()
         self.interactor.Destroy()  
65          Publisher.Destroy(self)          Publisher.Destroy(self)
66    
     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()  
   
67      def read_startup_files(self):      def read_startup_files(self):
68          """Read the startup files."""          """Read the startup files."""
69          # 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 78  class ThubanApplication(wxApp, Publisher
78                      if tb.tb_next is not None:                      if tb.tb_next is not None:
79                          # The ImportError exception was raised from                          # The ImportError exception was raised from
80                          # inside the thubanstart module.                          # inside the thubanstart module.
81                          sys.stderr.write("Cannot import the thubanstart"                          sys.stderr.write(_("Cannot import the thubanstart"
82                                           "module\n")                                           " module\n"))
83                          traceback.print_exc(None, sys.stderr)                          traceback.print_exc(None, sys.stderr)
84                      else:                      else:
85                          # There's no thubanstart module.                          # There's no thubanstart module.
86                          sys.stderr.write("No thubanstart module available\n")                          sys.stderr.write(_("No thubanstart module available\n"))
87                  finally:                  finally:
88                      # make sure we delete the traceback object,                      # make sure we delete the traceback object,
89                      # otherwise there's be circular references involving                      # otherwise there's be circular references involving
90                      # the current stack frame                      # the current stack frame
91                      del tb                      del tb
92              except:              except:
93                  sys.stderr.write("Cannot import the thubanstart module\n")                  sys.stderr.write(_("Cannot import the thubanstart module\n"))
94                  traceback.print_exc(None, sys.stderr)                  traceback.print_exc(None, sys.stderr)
95          else:          else:
96              # There's no .thuban directory              # There's no .thuban directory
97              sys.stderr.write("No ~/.thuban directory\n")              sys.stderr.write(_("No ~/.thuban directory\n"))
98    
99        def splash_screen(self):
100            """Create and return a splash screen.
101    
102            This method is called by OnInit to determine whether the
103            application should have a splashscreen. If the application
104            should display a splash screen override this method in a derived
105            class and have it create and return the wxSplashScreen instance.
106            The implementation of this method in the derived class should
107            also arranged for ShowMainWindow to be called.
108    
109            The default implementation simply returns None so that no splash
110            screen is shown and ShowMainWindow will be called automatically.
111            """
112            return None
113    
114        def ShowMainWindow(self):
115            """Show the main window
116    
117            Normally this method is automatically called by OnInit to show
118            the main window. However, if the splash_screen method has
119            returned a splashscreen it is expected that the derived class
120            also arranges for ShowMainWindow to be called at the appropriate
121            time.
122            """
123            self.top.Show(True)
124    
125      def CreateMainWindow(self):      def CreateMainWindow(self):
126          """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 128  class ThubanApplication(wxApp, Publisher
128          Override this in subclasses to instantiate the Thuban mainwindow          Override this in subclasses to instantiate the Thuban mainwindow
129          with different parameters or to use a different class for the          with different parameters or to use a different class for the
130          main window.          main window.
131            """
132          when this method is called by OnInit self.interactor (to be used          msg = (_("This is the wxPython-based Graphical User Interface"
133          for the interactor argument of the standard Thuban main window                 " for exploring geographic data"))
134          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,  
135                                       initial_message = msg)                                       initial_message = msg)
136    
137      def Session(self):      def Session(self):
# Line 127  class ThubanApplication(wxApp, Publisher Line 141  class ThubanApplication(wxApp, Publisher
141      def SetSession(self, session):      def SetSession(self, session):
142          """Make session the new session.          """Make session the new session.
143    
144          Issue SESSION_CHANGED after self.session has become the new          Issue SESSION_REPLACED after self.session has become the new
145          session. After the session has been assigned call          session. After the session has been assigned call
146          self.subscribe_session() with the new session and          self.subscribe_session() with the new session and
147          self.unsubscribe_session with the old one.          self.unsubscribe_session with the old one.
# Line 135  class ThubanApplication(wxApp, Publisher Line 149  class ThubanApplication(wxApp, Publisher
149          oldsession = self.session          oldsession = self.session
150          self.session = session          self.session = session
151          self.subscribe_session(self.session)          self.subscribe_session(self.session)
152          self.issue(SESSION_CHANGED)          self.issue(SESSION_REPLACED)
         self.interactor.SetSession(session)  
153          self.maps_changed()          self.maps_changed()
154          if oldsession is not None:          if oldsession is not None:
155              self.unsubscribe_session(oldsession)              self.unsubscribe_session(oldsession)
# Line 169  class ThubanApplication(wxApp, Publisher Line 182  class ThubanApplication(wxApp, Publisher
182          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
183    
184      def OpenSession(self, filename):      def OpenSession(self, filename):
185            """Open the session in the file named filename"""
186            # Make sure we deal with an absolute pathname. Otherwise we can
187            # get problems when saving because the saving code expects an
188            # absolute directory name
189            filename = os.path.abspath(filename)
190          session = load_session(filename)          session = load_session(filename)
191          session.SetFilename(filename)          session.SetFilename(filename)
192          session.UnsetModified()          session.UnsetModified()
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