/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/application.py
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revision 401 by bh, Tue Feb 11 15:19:21 2003 UTC revision 1162 by jonathan, Thu Jun 12 12:41:16 2003 UTC
# 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    
18  import traceback  import traceback
19    
20  from wxPython.wx import *  from wxPython.wx import *
21    
22  from Thuban.Lib.connector import Publisher  from Thuban.Lib.connector import Publisher
23    from Thuban.Lib.fileutil import get_application_dir
24    
25  from Thuban import _  from Thuban import _
26  from Thuban.Model.session import create_empty_session  from Thuban.Model.session import create_empty_session
27  from Thuban.Model.save import save_session  from Thuban.Model.save import save_session
28  from Thuban.Model.load import load_session  from Thuban.Model.load import load_session
29  from Thuban.Model.messages import MAPS_CHANGED  from Thuban.Model.messages import MAPS_CHANGED
30    from Thuban.Model.layer import RasterLayer
31    import Thuban.Model.resource
32    
33  import view  import view
34  import tree  import tree
 from interactor import Interactor  
35  import mainwindow  import mainwindow
36    
37  from messages import SESSION_CHANGED  from messages import SESSION_REPLACED
38    
39    
40    
# Line 41  class ThubanApplication(wxApp, Publisher Line 45  class ThubanApplication(wxApp, Publisher
45    
46      All wxWindows programs have to have an instance of an application      All wxWindows programs have to have an instance of an application
47      class derived from wxApp. In Thuban the application class holds      class derived from wxApp. In Thuban the application class holds
48      references to the main window, the session and the interactor.      references to the main window and the session.
49      """      """
50    
51      def OnInit(self):      def OnInit(self):
# Line 49  class ThubanApplication(wxApp, Publisher Line 53  class ThubanApplication(wxApp, Publisher
53          if self.splash is not None:          if self.splash is not None:
54              self.splash.Show()              self.splash.Show()
55          self.read_startup_files()          self.read_startup_files()
         self.interactor = Interactor(None)  
56          self.top = self.CreateMainWindow()          self.top = self.CreateMainWindow()
57          self.SetTopWindow(self.top)          self.SetTopWindow(self.top)
58          if self.splash is None:          if self.splash is None:
59              self.ShowMainWindow()              self.ShowMainWindow()
60          self.session = None          self.session = None
61          self.create_session()          self.create_session()
62          return true          return True
63    
64      def OnExit(self):      def OnExit(self):
65          """Clean up code.          """Clean up code.
# Line 64  class ThubanApplication(wxApp, Publisher Line 67  class ThubanApplication(wxApp, Publisher
67          Extend this in derived classes if needed.          Extend this in derived classes if needed.
68          """          """
69          self.session.Destroy()          self.session.Destroy()
70          self.interactor.Destroy()          self.session = None
71          Publisher.Destroy(self)          Publisher.Destroy(self)
72    
     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()  
   
73      def read_startup_files(self):      def read_startup_files(self):
74          """Read the startup files."""          """Read the startup files."""
75          # for now the startup file is ~/.thuban/thubanstart.py          # for now the startup file is ~/.thuban/thubanstart.py
76          dir =os.path.expanduser("~/.thuban")          dir = get_application_dir()
77          if os.path.isdir(dir):          if os.path.isdir(dir):
78              sys.path.append(dir)              sys.path.append(dir)
79              try:              try:
# Line 91  class ThubanApplication(wxApp, Publisher Line 85  class ThubanApplication(wxApp, Publisher
85                          # The ImportError exception was raised from                          # The ImportError exception was raised from
86                          # inside the thubanstart module.                          # inside the thubanstart module.
87                          sys.stderr.write(_("Cannot import the thubanstart"                          sys.stderr.write(_("Cannot import the thubanstart"
88                                           "module\n"))                                           " module\n"))
89                          traceback.print_exc(None, sys.stderr)                          traceback.print_exc(None, sys.stderr)
90                      else:                      else:
91                          # There's no thubanstart module.                          # There's no thubanstart module.
# Line 132  class ThubanApplication(wxApp, Publisher Line 126  class ThubanApplication(wxApp, Publisher
126          also arranges for ShowMainWindow to be called at the appropriate          also arranges for ShowMainWindow to be called at the appropriate
127          time.          time.
128          """          """
129          self.top.Show(true)          self.top.Show(True)
130          
131      def CreateMainWindow(self):      def CreateMainWindow(self):
132          """Create and return the main window for the application.          """Create and return the main window for the application.
133    
134          Override this in subclasses to instantiate the Thuban mainwindow          Override this in subclasses to instantiate the Thuban mainwindow
135          with different parameters or to use a different class for the          with different parameters or to use a different class for the
136          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.  
137          """          """
138          msg = (_("This is the wxPython-based Graphical User Interface"          msg = (_("This is the wxPython-based Graphical User Interface"
139                 " for exploring geographic data"))                 " for exploring geographic data"))
140          return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,          return mainwindow.MainWindow(NULL, -1, "Thuban", self, None,
141                                       initial_message = msg)                                       initial_message = msg,
142                                         size = (600, 400))
143    
144      def Session(self):      def Session(self):
145          """Return the application's session object"""          """Return the application's session object"""
# Line 157  class ThubanApplication(wxApp, Publisher Line 148  class ThubanApplication(wxApp, Publisher
148      def SetSession(self, session):      def SetSession(self, session):
149          """Make session the new session.          """Make session the new session.
150    
151          Issue SESSION_CHANGED after self.session has become the new          Issue SESSION_REPLACED after self.session has become the new
152          session. After the session has been assigned call          session. After the session has been assigned call
153          self.subscribe_session() with the new session and          self.subscribe_session() with the new session and
154          self.unsubscribe_session with the old one.          self.unsubscribe_session with the old one.
# Line 165  class ThubanApplication(wxApp, Publisher Line 156  class ThubanApplication(wxApp, Publisher
156          oldsession = self.session          oldsession = self.session
157          self.session = session          self.session = session
158          self.subscribe_session(self.session)          self.subscribe_session(self.session)
159          self.issue(SESSION_CHANGED)          self.issue(SESSION_REPLACED)
         self.interactor.SetSession(session)  
160          self.maps_changed()          self.maps_changed()
161          if oldsession is not None:          if oldsession is not None:
162              self.unsubscribe_session(oldsession)              self.unsubscribe_session(oldsession)
# Line 199  class ThubanApplication(wxApp, Publisher Line 189  class ThubanApplication(wxApp, Publisher
189          self.SetSession(create_empty_session())          self.SetSession(create_empty_session())
190    
191      def OpenSession(self, filename):      def OpenSession(self, filename):
192            """Open the session in the file named filename"""
193            # Make sure we deal with an absolute pathname. Otherwise we can
194            # get problems when saving because the saving code expects an
195            # absolute directory name
196            filename = os.path.abspath(filename)
197          session = load_session(filename)          session = load_session(filename)
198          session.SetFilename(filename)          session.SetFilename(filename)
199          session.UnsetModified()          session.UnsetModified()
200          self.SetSession(session)          self.SetSession(session)
201    
202            for map in session.Maps():
203                for layer in map.Layers():
204                    if isinstance(layer, RasterLayer) \
205                        and not Thuban.Model.resource.has_gdal_support():
206                        msg = _("The current session contains Image layers,\n" +
207                                "but the GDAL library is not available to " +
208                                "draw them.")
209                        dlg = wx.wxMessageDialog(None,
210                                                 msg,
211                                                 _("Library not available"),
212                                                 wx.wxOK | wx.wxICON_INFORMATION)
213                        print msg
214                        dlg.ShowModal()
215                        dlg.Destroy()
216                        break
217    
218      def SaveSession(self):      def SaveSession(self):
219          save_session(self.session, self.session.filename)          save_session(self.session, self.session.filename)
220    
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