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	bh	189	# Copyright (C) 2001, 2002 by Intevation GmbH
2	bh	6	# Authors:
3			# Jan-Oliver Wagner <[email protected]>
4	bh	189	# Bernhard Herzog <[email protected]>
5	bh	6	#
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	bh	189	import sys, os
16			import traceback
17
18	bh	6	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	bh	215	import mainwindow
30	bh	6
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	bh	189	self.read_startup_files()
47	bh	6	self.interactor = Interactor(None)
48	bh	235	top = self.CreateMainWindow()
49	bh	6	top.Show(true)
50			self.top = top
51			self.SetTopWindow(top)
52			self.session = None
53			self.create_session()
54			return true
55
56	bh	189	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	bh	235	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	bh	219	def Session(self):
105			"""Return the application's session object"""
106			return self.session
107
108	bh	6	def SetSession(self, session):
109	bh	219	"""Make session the new session.
110
111			Issue SESSION_CHANGED.
112			"""
113	bh	6	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