/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 229 by bh, Thu Jul 18 16:27:44 2002 UTC revision 242 by bh, Wed Jul 24 17:16:31 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, 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 85  class ThubanApplication(wxApp, Publisher Line 86  class ThubanApplication(wxApp, Publisher
86              # There's no .thuban directory              # There's no .thuban directory
87              sys.stderr.write("No ~/.thuban directory\n")              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):      def Session(self):
106          """Return the application's session object"""          """Return the application's session object"""
107          return self.session          return self.session
# Line 92  class ThubanApplication(wxApp, Publisher Line 109  class ThubanApplication(wxApp, Publisher
109      def SetSession(self, session):      def SetSession(self, session):
110          """Make session the new session.          """Make session the new session.
111    
112          Issue SESSION_CHANGED.          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 115  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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