Thuban/UI/application.py

# Copyright (C) 2001, 2002 by Intevation GmbH
# Authors:
# Jan-Oliver Wagner <[email protected]>
# Bernhard Herzog <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

"""
Thuban's application object.
"""

__version__ = "$Revision$"

import sys, os
import traceback

from wxPython.wx import *

from Thuban.Lib.connector import Publisher

from Thuban.Model.session import create_empty_session
from Thuban.Model.save import save_session
from Thuban.Model.load import load_session

import view
import tree
from interactor import Interactor
import mainwindow

from messages import SESSION_CHANGED


class ThubanApplication(wxApp, Publisher):

    """
    Thuban's application class.

    All wxWindows programs have to have an instance of an application
    class derived from wxApp. In Thuban the application class holds
    references to the main window, the session and the interactor.
    """

    def OnInit(self):
        self.read_startup_files()
        self.interactor = Interactor(None)
        top = self.CreateMainWindow()
        top.Show(true)
        self.top = top
        self.SetTopWindow(top)
        self.session = None
        self.create_session()
        return true

    def read_startup_files(self):
        """Read the startup files."""
        # for now the startup file is ~/.thuban/thubanstart.py
        dir =os.path.expanduser("~/.thuban")
        if os.path.isdir(dir):
            sys.path.append(dir)
            try:
                import thubanstart
            except ImportError:
                tb = sys.exc_info()[2]
                try:
                    if tb.tb_next is not None:
                        # The ImportError exception was raised from
                        # inside the thubanstart module.
                        sys.stderr.write("Cannot import the thubanstart"
                                         "module\n")
                        traceback.print_exc(None, sys.stderr)
                    else:
                        # There's no thubanstart module.
                        sys.stderr.write("No thubanstart module available\n")
                finally:
                    # make sure we delete the traceback object,
                    # otherwise there's be circular references involving
                    # the current stack frame
                    del tb
            except:
                sys.stderr.write("Cannot import the thubanstart module\n")
                traceback.print_exc(None, sys.stderr)
        else:
            # There's no .thuban directory
            sys.stderr.write("No ~/.thuban directory\n")

    def CreateMainWindow(self):
        """Create and return the main window for the application.

        Override this in subclasses to instantiate the Thuban mainwindow
        with different parameters or to use a different class for the
        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.
        """
        msg = ("This is the wxPython-based Graphical User Interface"
               " for exploring geographic data")
        return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,
                                     initial_message = msg)

    def Session(self):
        """Return the application's session object"""
        return self.session

    def SetSession(self, session):
        """Make session the new session.

        Issue SESSION_CHANGED.
        """
        oldsession = self.session
        self.session = session
        self.issue(SESSION_CHANGED)
        self.interactor.SetSession(session)
        self.set_map()
        if oldsession is not None:
            oldsession.Destroy()

    def create_session(self):
        # Create a simple default session
        self.SetSession(create_empty_session())

    def OpenSession(self, filename):
        session = load_session(filename)
        session.SetFilename(filename)
        session.UnsetModified()
        self.SetSession(session)

    def SaveSession(self):
        save_session(self.session, self.session.filename)

    def set_map(self):
        if self.session.HasMaps():
            self.top.SetMap(self.session.Maps()[0])
        else:
            self.top.SetMap(None)
1	# Copyright (C) 2001, 2002 by Intevation GmbH
2	# Authors:
3	# Jan-Oliver Wagner <[email protected]>
4	# Bernhard Herzog <[email protected]>
5	#
6	# This program is free software under the GPL (>=v2)
7	# Read the file COPYING coming with Thuban for details.
8
9	"""
10	Thuban's application object.
11	"""
12
13	__version__ = "$Revision$"
14
15	import sys, os
16	import traceback
17
18	from wxPython.wx import *
19
20	from Thuban.Lib.connector import Publisher
21
22	from Thuban.Model.session import create_empty_session
23	from Thuban.Model.save import save_session
24	from Thuban.Model.load import load_session
25
26	import view
27	import tree
28	from interactor import Interactor
29	import mainwindow
30
31	from messages import SESSION_CHANGED
32
33
34
35	class ThubanApplication(wxApp, Publisher):
36
37	"""
38	Thuban's application class.
39
40	All wxWindows programs have to have an instance of an application
41	class derived from wxApp. In Thuban the application class holds
42	references to the main window, the session and the interactor.
43	"""
44
45	def OnInit(self):
46	self.read_startup_files()
47	self.interactor = Interactor(None)
48	top = self.CreateMainWindow()
49	top.Show(true)
50	self.top = top
51	self.SetTopWindow(top)
52	self.session = None
53	self.create_session()
54	return true
55
56	def read_startup_files(self):
57	"""Read the startup files."""
58	# for now the startup file is ~/.thuban/thubanstart.py
59	dir =os.path.expanduser("~/.thuban")
60	if os.path.isdir(dir):
61	sys.path.append(dir)
62	try:
63	import thubanstart
64	except ImportError:
65	tb = sys.exc_info()[2]
66	try:
67	if tb.tb_next is not None:
68	# The ImportError exception was raised from
69	# inside the thubanstart module.
70	sys.stderr.write("Cannot import the thubanstart"
71	"module\n")
72	traceback.print_exc(None, sys.stderr)
73	else:
74	# There's no thubanstart module.
75	sys.stderr.write("No thubanstart module available\n")
76	finally:
77	# make sure we delete the traceback object,
78	# otherwise there's be circular references involving
79	# the current stack frame
80	del tb
81	except:
82	sys.stderr.write("Cannot import the thubanstart module\n")
83	traceback.print_exc(None, sys.stderr)
84	else:
85	# There's no .thuban directory
86	sys.stderr.write("No ~/.thuban directory\n")
87
88	def CreateMainWindow(self):
89	"""Create and return the main window for the application.
90
91	Override this in subclasses to instantiate the Thuban mainwindow
92	with different parameters or to use a different class for the
93	main window.
94
95	when this method is called by OnInit self.interactor (to be used
96	for the interactor argument of the standard Thuban main window
97	class) has already been instantiated.
98	"""
99	msg = ("This is the wxPython-based Graphical User Interface"
100	" for exploring geographic data")
101	return mainwindow.MainWindow(NULL, -1, "Thuban", self, self.interactor,
102	initial_message = msg)
103
104	def Session(self):
105	"""Return the application's session object"""
106	return self.session
107
108	def SetSession(self, session):
109	"""Make session the new session.
110
111	Issue SESSION_CHANGED.
112	"""
113	oldsession = self.session
114	self.session = session
115	self.issue(SESSION_CHANGED)
116	self.interactor.SetSession(session)
117	self.set_map()
118	if oldsession is not None:
119	oldsession.Destroy()
120
121	def create_session(self):
122	# Create a simple default session
123	self.SetSession(create_empty_session())
124
125	def OpenSession(self, filename):
126	session = load_session(filename)
127	session.SetFilename(filename)
128	session.UnsetModified()
129	self.SetSession(session)
130
131	def SaveSession(self):
132	save_session(self.session, self.session.filename)
133
134	def set_map(self):
135	if self.session.HasMaps():
136	self.top.SetMap(self.session.Maps()[0])
137	else:
138	self.top.SetMap(None)
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision