/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 25 by bh, Wed Sep 5 13:36:13 2001 UTC revision 242 by bh, Wed Jul 24 17:16:31 2002 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001 by Intevation GmbH  # Copyright (C) 2001, 2002 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4    # Bernhard Herzog <[email protected]>
5  #  #
6  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
7  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 11  Thuban's application object. Line 12  Thuban's application object.
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    
15    import sys, os
16    import traceback
17    
18  from wxPython.wx import *  from wxPython.wx import *
19    
20  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
# Line 18  from Thuban.Lib.connector import Publish Line 22  from Thuban.Lib.connector import Publish
22  from Thuban.Model.session import create_empty_session  from Thuban.Model.session import create_empty_session
23  from Thuban.Model.save import save_session  from Thuban.Model.save import save_session
24  from Thuban.Model.load import load_session  from Thuban.Model.load import load_session
25    from Thuban.Model.messages import MAPS_CHANGED
26    
27  import view  import view
28  import tree  import tree
29  from interactor import Interactor  from interactor import Interactor
30  from mainwindow import MainWindow  import mainwindow
31    
32  from messages import SESSION_CHANGED  from messages import SESSION_CHANGED
33    
# Line 39  class ThubanApplication(wxApp, Publisher Line 44  class ThubanApplication(wxApp, Publisher
44      """      """
45    
46      def OnInit(self):      def OnInit(self):
47            self.read_startup_files()
48          self.interactor = Interactor(None)          self.interactor = Interactor(None)
49          top = MainWindow(NULL, -1, self.interactor)          top = self.CreateMainWindow()
50          top.Show(true)          top.Show(true)
51          self.top = top          self.top = top
52          self.SetTopWindow(top)          self.SetTopWindow(top)
53          self.session = None          self.session = None
54          self.create_session()          self.create_session()
   
         f = wxFrame(top, -1, 'test', wxDefaultPosition, wxSize(300, 300))  
         self.tree = tree.myTreeCtrlPanel(f, self)  
         f.Show(true)  
55          return true          return true
56    
57        def read_startup_files(self):
58            """Read the startup files."""
59            # for now the startup file is ~/.thuban/thubanstart.py
60            dir =os.path.expanduser("~/.thuban")
61            if os.path.isdir(dir):
62                sys.path.append(dir)
63                try:
64                    import thubanstart
65                except ImportError:
66                    tb = sys.exc_info()[2]
67                    try:
68                        if tb.tb_next is not None:
69                            # The ImportError exception was raised from
70                            # inside the thubanstart module.
71                            sys.stderr.write("Cannot import the thubanstart"
72                                             "module\n")
73                            traceback.print_exc(None, sys.stderr)
74                        else:
75                            # There's no thubanstart module.
76                            sys.stderr.write("No thubanstart module available\n")
77                    finally:
78                        # make sure we delete the traceback object,
79                        # otherwise there's be circular references involving
80                        # the current stack frame
81                        del tb
82                except:
83                    sys.stderr.write("Cannot import the thubanstart module\n")
84                    traceback.print_exc(None, sys.stderr)
85            else:
86                # There's no .thuban directory
87                sys.stderr.write("No ~/.thuban directory\n")
88    
89        def CreateMainWindow(self):
90            """Create and return the main window for the application.
91    
92            Override this in subclasses to instantiate the Thuban mainwindow
93            with different parameters or to use a different class for the
94            main window.
95    
96            when this method is called by OnInit self.interactor (to be used
97            for the interactor argument of the standard Thuban main window
98            class) has already been instantiated.
99            """
100            msg = ("This is the wxPython-based Graphical User Interface"
101                   " for exploring geographic data")
102            return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,
103                                         initial_message = msg)
104    
105        def Session(self):
106            """Return the application's session object"""
107            return self.session
108    
109      def SetSession(self, session):      def SetSession(self, session):
110            """Make session the new session.
111    
112            Issue SESSION_CHANGED after self.session has become the new
113            session. After the session has been assigned call
114            self.subscribe_session() with the new session and
115            self.unsubscribe_session with the old one.
116            """
117          oldsession = self.session          oldsession = self.session
118          self.session = session          self.session = session
119            self.subscribe_session(self.session)
120          self.issue(SESSION_CHANGED)          self.issue(SESSION_CHANGED)
121          self.interactor.SetSession(session)          self.interactor.SetSession(session)
122          self.set_map()          self.maps_changed()
123          if oldsession is not None:          if oldsession is not None:
124                self.unsubscribe_session(oldsession)
125              oldsession.Destroy()              oldsession.Destroy()
126    
127        def subscribe_session(self, session):
128            """Subscribe to some of the sessions channels.
129    
130            Extend this method in derived classes if you need additional
131            channels.
132            """
133            session.Subscribe(MAPS_CHANGED, self.maps_changed)
134    
135        def unsubscribe_session(self, session):
136            """Unsubscribe from the sessions channels.
137    
138            Extend this method in derived classes if you subscribed to
139            additional channels in subscribe_session().
140            """
141            session.Unsubscribe(MAPS_CHANGED, self.maps_changed)
142    
143      def create_session(self):      def create_session(self):
144          # Create a simple default session          """Create a default session.
145    
146            Override this method in derived classes to instantiate the
147            session differently or to use a different session class. Don't
148            subscribe to channels here yet. Do that in the
149            subscribe_session() method.
150            """
151          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
152    
153      def OpenSession(self, filename):      def OpenSession(self, filename):
# Line 74  class ThubanApplication(wxApp, Publisher Line 159  class ThubanApplication(wxApp, Publisher
159      def SaveSession(self):      def SaveSession(self):
160          save_session(self.session, self.session.filename)          save_session(self.session, self.session.filename)
161    
162      def set_map(self):      def maps_changed(self, *args):
163          if self.session.HasMaps():          if self.session.HasMaps():
164              self.top.SetMap(self.session.Maps()[0])              self.top.SetMap(self.session.Maps()[0])
165          else:          else:
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