/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 215 by bh, Tue Jul 16 15:26:06 2002 UTC revision 251 by bh, Tue Jul 30 14:18:40 2002 UTC
# Line 22  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
# Line 45  class ThubanApplication(wxApp, Publisher Line 46  class ThubanApplication(wxApp, Publisher
46      def OnInit(self):      def OnInit(self):
47          self.read_startup_files()          self.read_startup_files()
48          self.interactor = Interactor(None)          self.interactor = Interactor(None)
49          top = mainwindow.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)
# Line 53  class ThubanApplication(wxApp, Publisher Line 54  class ThubanApplication(wxApp, Publisher
54          self.create_session()          self.create_session()
55          return true          return true
56    
57        def OnExit(self):
58            """Clean up code.
59    
60            Extend this in derived classes if needed.
61            """
62            self.session.Destroy()
63            self.interactor.Destroy()
64            Publisher.Destroy(self)
65    
66        def MainLoop(self):
67            """Call the inherited MainLoop method and then call OnExit.
68    
69            In wxPython OnExit isn't called automatically, unfortunately, so
70            we do it here.
71            """
72            wxApp.MainLoop(self)
73            self.OnExit()
74    
75      def read_startup_files(self):      def read_startup_files(self):
76          """Read the startup files."""          """Read the startup files."""
77          # for now the startup file is ~/.thuban/thubanstart.py          # for now the startup file is ~/.thuban/thubanstart.py
# Line 85  class ThubanApplication(wxApp, Publisher Line 104  class ThubanApplication(wxApp, Publisher
104              # There's no .thuban directory              # There's no .thuban directory
105              sys.stderr.write("No ~/.thuban directory\n")              sys.stderr.write("No ~/.thuban directory\n")
106    
107        def CreateMainWindow(self):
108            """Create and return the main window for the application.
109    
110            Override this in subclasses to instantiate the Thuban mainwindow
111            with different parameters or to use a different class for the
112            main window.
113    
114            when this method is called by OnInit self.interactor (to be used
115            for the interactor argument of the standard Thuban main window
116            class) has already been instantiated.
117            """
118            msg = ("This is the wxPython-based Graphical User Interface"
119                   " for exploring geographic data")
120            return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,
121                                         initial_message = msg)
122    
123        def Session(self):
124            """Return the application's session object"""
125            return self.session
126    
127      def SetSession(self, session):      def SetSession(self, session):
128            """Make session the new session.
129    
130            Issue SESSION_CHANGED after self.session has become the new
131            session. After the session has been assigned call
132            self.subscribe_session() with the new session and
133            self.unsubscribe_session with the old one.
134            """
135          oldsession = self.session          oldsession = self.session
136          self.session = session          self.session = session
137            self.subscribe_session(self.session)
138          self.issue(SESSION_CHANGED)          self.issue(SESSION_CHANGED)
139          self.interactor.SetSession(session)          self.interactor.SetSession(session)
140          self.set_map()          self.maps_changed()
141          if oldsession is not None:          if oldsession is not None:
142                self.unsubscribe_session(oldsession)
143              oldsession.Destroy()              oldsession.Destroy()
144    
145        def subscribe_session(self, session):
146            """Subscribe to some of the sessions channels.
147    
148            Extend this method in derived classes if you need additional
149            channels.
150            """
151            session.Subscribe(MAPS_CHANGED, self.maps_changed)
152    
153        def unsubscribe_session(self, session):
154            """Unsubscribe from the sessions channels.
155    
156            Extend this method in derived classes if you subscribed to
157            additional channels in subscribe_session().
158            """
159            session.Unsubscribe(MAPS_CHANGED, self.maps_changed)
160    
161      def create_session(self):      def create_session(self):
162          # Create a simple default session          """Create a default session.
163    
164            Override this method in derived classes to instantiate the
165            session differently or to use a different session class. Don't
166            subscribe to channels here yet. Do that in the
167            subscribe_session() method.
168            """
169          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
170    
171      def OpenSession(self, filename):      def OpenSession(self, filename):
# Line 107  class ThubanApplication(wxApp, Publisher Line 177  class ThubanApplication(wxApp, Publisher
177      def SaveSession(self):      def SaveSession(self):
178          save_session(self.session, self.session.filename)          save_session(self.session, self.session.filename)
179    
180      def set_map(self):      def maps_changed(self, *args):
181          if self.session.HasMaps():          if self.session.HasMaps():
182              self.top.SetMap(self.session.Maps()[0])              self.top.SetMap(self.session.Maps()[0])
183          else:          else:
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