/[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 1133 by frank, Thu Jun 5 13:27:33 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 13  Thuban's application object. Line 13  Thuban's application object.
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    
15  import sys, os  import sys, os
16    import os.path
17    from tempfile import mktemp
18    
19  import traceback  import traceback
20    
21  from wxPython.wx import *  from wxPython.wx import *
# Line 27  from Thuban.Model.messages import MAPS_C Line 30  from Thuban.Model.messages import MAPS_C
30    
31  import view  import view
32  import tree  import tree
 from interactor import Interactor  
33  import mainwindow  import mainwindow
34    
35  from messages import SESSION_CHANGED  from messages import SESSION_REPLACED
36    
37    
38    
# Line 41  class ThubanApplication(wxApp, Publisher Line 43  class ThubanApplication(wxApp, Publisher
43    
44      All wxWindows programs have to have an instance of an application      All wxWindows programs have to have an instance of an application
45      class derived from wxApp. In Thuban the application class holds      class derived from wxApp. In Thuban the application class holds
46      references to the main window, the session and the interactor.      references to the main window and the session.
47      """      """
48    
49      def OnInit(self):      def OnInit(self):
50            self.splash = self.splash_screen()
51            if self.splash is not None:
52                self.splash.Show()
53          self.read_startup_files()          self.read_startup_files()
54          self.interactor = Interactor(None)          self.top = self.CreateMainWindow()
55          top = self.CreateMainWindow()          self.SetTopWindow(self.top)
56          top.Show(true)          if self.splash is None:
57          self.top = top              self.ShowMainWindow()
         self.SetTopWindow(top)  
58          self.session = None          self.session = None
59          self.create_session()          self.create_session()
60          return true          return True
61    
62      def OnExit(self):      def OnExit(self):
63          """Clean up code.          """Clean up code.
# Line 61  class ThubanApplication(wxApp, Publisher Line 65  class ThubanApplication(wxApp, Publisher
65          Extend this in derived classes if needed.          Extend this in derived classes if needed.
66          """          """
67          self.session.Destroy()          self.session.Destroy()
68          self.interactor.Destroy()          self.session = None
69          Publisher.Destroy(self)          Publisher.Destroy(self)
70    
     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()  
   
71      def read_startup_files(self):      def read_startup_files(self):
72          """Read the startup files."""          """Read the startup files."""
73          # for now the startup file is ~/.thuban/thubanstart.py          # for now the startup file is ~/.thuban/thubanstart.py
74          dir =os.path.expanduser("~/.thuban")          if os.name == 'nt':
75                # This should result in something like the user directory ...
76                guess = os.path.dirname(os.path.dirname(os.path.dirname(mktemp())))
77                dir = os.path.join(guess, ".thuban")
78                if not os.path.isdir(dir):
79                    os.mkdir(dir)
80            else:
81                dir =os.path.expanduser("~/.thuban")
82          if os.path.isdir(dir):          if os.path.isdir(dir):
83              sys.path.append(dir)              sys.path.append(dir)
84              try:              try:
# Line 88  class ThubanApplication(wxApp, Publisher Line 90  class ThubanApplication(wxApp, Publisher
90                          # The ImportError exception was raised from                          # The ImportError exception was raised from
91                          # inside the thubanstart module.                          # inside the thubanstart module.
92                          sys.stderr.write(_("Cannot import the thubanstart"                          sys.stderr.write(_("Cannot import the thubanstart"
93                                           "module\n"))                                           " module\n"))
94                          traceback.print_exc(None, sys.stderr)                          traceback.print_exc(None, sys.stderr)
95                      else:                      else:
96                          # There's no thubanstart module.                          # There's no thubanstart module.
# Line 105  class ThubanApplication(wxApp, Publisher Line 107  class ThubanApplication(wxApp, Publisher
107              # There's no .thuban directory              # There's no .thuban directory
108              sys.stderr.write(_("No ~/.thuban directory\n"))              sys.stderr.write(_("No ~/.thuban directory\n"))
109    
110        def splash_screen(self):
111            """Create and return a splash screen.
112    
113            This method is called by OnInit to determine whether the
114            application should have a splashscreen. If the application
115            should display a splash screen override this method in a derived
116            class and have it create and return the wxSplashScreen instance.
117            The implementation of this method in the derived class should
118            also arranged for ShowMainWindow to be called.
119    
120            The default implementation simply returns None so that no splash
121            screen is shown and ShowMainWindow will be called automatically.
122            """
123            return None
124    
125        def ShowMainWindow(self):
126            """Show the main window
127    
128            Normally this method is automatically called by OnInit to show
129            the main window. However, if the splash_screen method has
130            returned a splashscreen it is expected that the derived class
131            also arranges for ShowMainWindow to be called at the appropriate
132            time.
133            """
134            self.top.Show(True)
135    
136      def CreateMainWindow(self):      def CreateMainWindow(self):
137          """Create and return the main window for the application.          """Create and return the main window for the application.
138    
139          Override this in subclasses to instantiate the Thuban mainwindow          Override this in subclasses to instantiate the Thuban mainwindow
140          with different parameters or to use a different class for the          with different parameters or to use a different class for the
141          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.  
142          """          """
143          msg = (_("This is the wxPython-based Graphical User Interface"          msg = (_("This is the wxPython-based Graphical User Interface"
144                 " for exploring geographic data"))                 " for exploring geographic data"))
145          return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,          return mainwindow.MainWindow(NULL, -1, "Thuban", self, None,
146                                       initial_message = msg)                                       initial_message = msg,
147                                         size = (600, 400))
148    
149      def Session(self):      def Session(self):
150          """Return the application's session object"""          """Return the application's session object"""
# Line 128  class ThubanApplication(wxApp, Publisher Line 153  class ThubanApplication(wxApp, Publisher
153      def SetSession(self, session):      def SetSession(self, session):
154          """Make session the new session.          """Make session the new session.
155    
156          Issue SESSION_CHANGED after self.session has become the new          Issue SESSION_REPLACED after self.session has become the new
157          session. After the session has been assigned call          session. After the session has been assigned call
158          self.subscribe_session() with the new session and          self.subscribe_session() with the new session and
159          self.unsubscribe_session with the old one.          self.unsubscribe_session with the old one.
# Line 136  class ThubanApplication(wxApp, Publisher Line 161  class ThubanApplication(wxApp, Publisher
161          oldsession = self.session          oldsession = self.session
162          self.session = session          self.session = session
163          self.subscribe_session(self.session)          self.subscribe_session(self.session)
164          self.issue(SESSION_CHANGED)          self.issue(SESSION_REPLACED)
         self.interactor.SetSession(session)  
165          self.maps_changed()          self.maps_changed()
166          if oldsession is not None:          if oldsession is not None:
167              self.unsubscribe_session(oldsession)              self.unsubscribe_session(oldsession)
# Line 170  class ThubanApplication(wxApp, Publisher Line 194  class ThubanApplication(wxApp, Publisher
194          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
195    
196      def OpenSession(self, filename):      def OpenSession(self, filename):
197            """Open the session in the file named filename"""
198            # Make sure we deal with an absolute pathname. Otherwise we can
199            # get problems when saving because the saving code expects an
200            # absolute directory name
201            filename = os.path.abspath(filename)
202          session = load_session(filename)          session = load_session(filename)
203          session.SetFilename(filename)          session.SetFilename(filename)
204          session.UnsetModified()          session.UnsetModified()
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