| 1 |
# Copyright (C) 2001 by Intevation GmbH |
# Copyright (C) 2001, 2002, 2003, 2004 by Intevation GmbH |
| 2 |
# Authors: |
# Authors: |
| 3 |
# Jan-Oliver Wagner <[email protected]> |
# Jan-Oliver Wagner <[email protected]> |
| 4 |
|
# Bernhard Herzog <[email protected]> |
| 5 |
# |
# |
| 6 |
# This program is free software under the GPL (>=v2) |
# This program is free software under the GPL (>=v2) |
| 7 |
# Read the file COPYING coming with Thuban for details. |
# Read the file COPYING coming with Thuban for details. |
| 12 |
|
|
| 13 |
__version__ = "$Revision$" |
__version__ = "$Revision$" |
| 14 |
|
|
| 15 |
|
import sys, os |
| 16 |
|
import os.path |
| 17 |
|
|
| 18 |
|
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 _ |
| 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, LoadCancelled |
| 29 |
|
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 |
| 35 |
from interactor import Interactor |
import mainwindow |
| 36 |
from mainwindow import MainWindow |
import dbdialog |
| 37 |
|
import altpathdialog |
| 38 |
from messages import SESSION_CHANGED |
import exceptiondialog |
| 39 |
|
|
| 40 |
|
from messages import SESSION_REPLACED |
| 41 |
|
|
| 42 |
|
|
| 43 |
class ThubanApplication(wxApp, Publisher): |
class ThubanApplication(wxApp, Publisher): |
| 47 |
|
|
| 48 |
All wxWindows programs have to have an instance of an application |
All wxWindows programs have to have an instance of an application |
| 49 |
class derived from wxApp. In Thuban the application class holds |
class derived from wxApp. In Thuban the application class holds |
| 50 |
references to the main window, the session and the interactor. |
references to the main window and the session. |
| 51 |
""" |
""" |
| 52 |
|
|
| 53 |
def OnInit(self): |
def OnInit(self): |
| 54 |
# ugly hack to set the global app object before window-classes |
sys.excepthook = self.ShowExceptionDialog |
| 55 |
# are instantiated |
|
| 56 |
import main |
# Initialize instance variables before trying to create any |
| 57 |
main.app = self |
# windows. Creating windows can start an event loop if |
| 58 |
self.interactor = Interactor(None) |
# e.g. message boxes are popped up for some reason, and event |
| 59 |
top = MainWindow(NULL, -1) |
# handlers, especially EVT_UPDATE_UI may want to access things |
| 60 |
top.Show(true) |
# from the application. |
| 61 |
self.top = top |
|
| 62 |
self.SetTopWindow(top) |
# Defaults for the directories used in file dialogs |
| 63 |
|
self.path={"data":".", "projection":".", "alt_path":""} |
| 64 |
|
|
| 65 |
self.session = None |
self.session = None |
| 66 |
|
self.top = None |
| 67 |
self.create_session() |
self.create_session() |
| 68 |
|
|
| 69 |
f = wxFrame(top, -1, 'test', wxDefaultPosition, wxSize(300, 300)) |
# Create an optional splash screen and then the mainwindow |
| 70 |
self.tree = tree.myTreeCtrlPanel(f, self) |
self.splash = self.splash_screen() |
| 71 |
f.Show(true) |
if self.splash is not None: |
| 72 |
return true |
self.splash.Show() |
| 73 |
|
self.read_startup_files() |
| 74 |
|
self.top = self.CreateMainWindow() |
| 75 |
|
# The session was alredy created above and we need to get the |
| 76 |
|
# map into the mainwindow. maps_changed does that. |
| 77 |
|
self.maps_changed() |
| 78 |
|
self.SetTopWindow(self.top) |
| 79 |
|
if self.splash is None: |
| 80 |
|
self.ShowMainWindow() |
| 81 |
|
|
| 82 |
|
return True |
| 83 |
|
|
| 84 |
|
def OnExit(self): |
| 85 |
|
"""Clean up code. |
| 86 |
|
|
| 87 |
|
Extend this in derived classes if needed. |
| 88 |
|
""" |
| 89 |
|
self.session.Destroy() |
| 90 |
|
self.session = None |
| 91 |
|
Publisher.Destroy(self) |
| 92 |
|
|
| 93 |
|
def read_startup_files(self): |
| 94 |
|
"""Read the startup files.""" |
| 95 |
|
# for now the startup file is ~/.thuban/thubanstart.py |
| 96 |
|
dir = get_application_dir() |
| 97 |
|
if os.path.isdir(dir): |
| 98 |
|
sys.path.append(dir) |
| 99 |
|
try: |
| 100 |
|
import thubanstart |
| 101 |
|
except ImportError: |
| 102 |
|
tb = sys.exc_info()[2] |
| 103 |
|
try: |
| 104 |
|
if tb.tb_next is not None: |
| 105 |
|
# The ImportError exception was raised from |
| 106 |
|
# inside the thubanstart module. |
| 107 |
|
sys.stderr.write(_("Cannot import the thubanstart" |
| 108 |
|
" module\n")) |
| 109 |
|
traceback.print_exc(None, sys.stderr) |
| 110 |
|
else: |
| 111 |
|
# There's no thubanstart module. |
| 112 |
|
sys.stderr.write(_("No thubanstart module available\n")) |
| 113 |
|
finally: |
| 114 |
|
# make sure we delete the traceback object, |
| 115 |
|
# otherwise there's be circular references involving |
| 116 |
|
# the current stack frame |
| 117 |
|
del tb |
| 118 |
|
except: |
| 119 |
|
sys.stderr.write(_("Cannot import the thubanstart module\n")) |
| 120 |
|
traceback.print_exc(None, sys.stderr) |
| 121 |
|
else: |
| 122 |
|
# There's no .thuban directory |
| 123 |
|
sys.stderr.write(_("No ~/.thuban directory\n")) |
| 124 |
|
|
| 125 |
|
def splash_screen(self): |
| 126 |
|
"""Create and return a splash screen. |
| 127 |
|
|
| 128 |
|
This method is called by OnInit to determine whether the |
| 129 |
|
application should have a splashscreen. If the application |
| 130 |
|
should display a splash screen override this method in a derived |
| 131 |
|
class and have it create and return the wxSplashScreen instance. |
| 132 |
|
The implementation of this method in the derived class should |
| 133 |
|
also arranged for ShowMainWindow to be called. |
| 134 |
|
|
| 135 |
|
The default implementation simply returns None so that no splash |
| 136 |
|
screen is shown and ShowMainWindow will be called automatically. |
| 137 |
|
""" |
| 138 |
|
return None |
| 139 |
|
|
| 140 |
|
def ShowMainWindow(self): |
| 141 |
|
"""Show the main window |
| 142 |
|
|
| 143 |
|
Normally this method is automatically called by OnInit to show |
| 144 |
|
the main window. However, if the splash_screen method has |
| 145 |
|
returned a splashscreen it is expected that the derived class |
| 146 |
|
also arranges for ShowMainWindow to be called at the appropriate |
| 147 |
|
time. |
| 148 |
|
""" |
| 149 |
|
self.top.Show(True) |
| 150 |
|
|
| 151 |
|
def CreateMainWindow(self): |
| 152 |
|
"""Create and return the main window for the application. |
| 153 |
|
|
| 154 |
|
Override this in subclasses to instantiate the Thuban mainwindow |
| 155 |
|
with different parameters or to use a different class for the |
| 156 |
|
main window. |
| 157 |
|
""" |
| 158 |
|
msg = (_("This is the wxPython-based Graphical User Interface" |
| 159 |
|
" for exploring geographic data")) |
| 160 |
|
return mainwindow.MainWindow(NULL, -1, "Thuban", self, None, |
| 161 |
|
initial_message = msg, |
| 162 |
|
size = (600, 400)) |
| 163 |
|
|
| 164 |
|
def Session(self): |
| 165 |
|
"""Return the application's session object""" |
| 166 |
|
return self.session |
| 167 |
|
|
| 168 |
def SetSession(self, session): |
def SetSession(self, session): |
| 169 |
|
"""Make session the new session. |
| 170 |
|
|
| 171 |
|
Issue SESSION_REPLACED after self.session has become the new |
| 172 |
|
session. After the session has been assigned call |
| 173 |
|
self.subscribe_session() with the new session and |
| 174 |
|
self.unsubscribe_session with the old one. |
| 175 |
|
""" |
| 176 |
oldsession = self.session |
oldsession = self.session |
| 177 |
self.session = session |
self.session = session |
| 178 |
self.issue(SESSION_CHANGED) |
self.subscribe_session(self.session) |
| 179 |
self.interactor.SetSession(session) |
self.issue(SESSION_REPLACED) |
| 180 |
self.set_map() |
self.maps_changed() |
| 181 |
if oldsession is not None: |
if oldsession is not None: |
| 182 |
|
self.unsubscribe_session(oldsession) |
| 183 |
oldsession.Destroy() |
oldsession.Destroy() |
| 184 |
|
|
| 185 |
|
def SetPath(self, group, filename): |
| 186 |
|
"""Store the application's default path for file dialogs extracted |
| 187 |
|
from a given filename. |
| 188 |
|
""" |
| 189 |
|
self.path[group] = os.path.dirname( filename ) |
| 190 |
|
|
| 191 |
|
def Path(self, group): |
| 192 |
|
"""Return the application's default path for file dialogs.""" |
| 193 |
|
return self.path[group] |
| 194 |
|
|
| 195 |
|
def subscribe_session(self, session): |
| 196 |
|
"""Subscribe to some of the sessions channels. |
| 197 |
|
|
| 198 |
|
Extend this method in derived classes if you need additional |
| 199 |
|
channels. |
| 200 |
|
""" |
| 201 |
|
session.Subscribe(MAPS_CHANGED, self.maps_changed) |
| 202 |
|
|
| 203 |
|
def unsubscribe_session(self, session): |
| 204 |
|
"""Unsubscribe from the sessions channels. |
| 205 |
|
|
| 206 |
|
Extend this method in derived classes if you subscribed to |
| 207 |
|
additional channels in subscribe_session(). |
| 208 |
|
""" |
| 209 |
|
session.Unsubscribe(MAPS_CHANGED, self.maps_changed) |
| 210 |
|
|
| 211 |
def create_session(self): |
def create_session(self): |
| 212 |
# Create a simple default session |
"""Create a default session. |
| 213 |
|
|
| 214 |
|
Override this method in derived classes to instantiate the |
| 215 |
|
session differently or to use a different session class. Don't |
| 216 |
|
subscribe to channels here yet. Do that in the |
| 217 |
|
subscribe_session() method. |
| 218 |
|
""" |
| 219 |
self.SetSession(create_empty_session()) |
self.SetSession(create_empty_session()) |
| 220 |
|
|
| 221 |
def OpenSession(self, filename): |
def OpenSession(self, filename, db_connection_callback = None, |
| 222 |
session = load_session(filename) |
shapefile_callback = None): |
| 223 |
|
"""Open the session in the file named filename""" |
| 224 |
|
# Make sure we deal with an absolute pathname. Otherwise we can |
| 225 |
|
# get problems when saving because the saving code expects an |
| 226 |
|
# absolute directory name |
| 227 |
|
filename = os.path.abspath(filename) |
| 228 |
|
if db_connection_callback is None: |
| 229 |
|
db_connection_callback = self.run_db_param_dialog |
| 230 |
|
if shapefile_callback is None: |
| 231 |
|
shapefile_callback = self.run_alt_path_dialog |
| 232 |
|
try: |
| 233 |
|
session = load_session(filename, |
| 234 |
|
db_connection_callback=db_connection_callback, |
| 235 |
|
shapefile_callback=shapefile_callback) |
| 236 |
|
except LoadCancelled: |
| 237 |
|
return |
| 238 |
session.SetFilename(filename) |
session.SetFilename(filename) |
| 239 |
session.UnsetModified() |
session.UnsetModified() |
| 240 |
self.SetSession(session) |
self.SetSession(session) |
| 241 |
|
|
| 242 |
|
for map in session.Maps(): |
| 243 |
|
for layer in map.Layers(): |
| 244 |
|
if isinstance(layer, RasterLayer) \ |
| 245 |
|
and not Thuban.Model.resource.has_gdal_support(): |
| 246 |
|
msg = _("The current session contains Image layers,\n" |
| 247 |
|
"but the GDAL library is not available to " |
| 248 |
|
"draw them.") |
| 249 |
|
dlg = wx.wxMessageDialog(None, |
| 250 |
|
msg, |
| 251 |
|
_("Library not available"), |
| 252 |
|
wx.wxOK | wx.wxICON_INFORMATION) |
| 253 |
|
print msg |
| 254 |
|
dlg.ShowModal() |
| 255 |
|
dlg.Destroy() |
| 256 |
|
break |
| 257 |
|
|
| 258 |
|
def run_db_param_dialog(self, parameters, message): |
| 259 |
|
"""Implementation of the db_connection_callback for loading sessions""" |
| 260 |
|
dlg = dbdialog.DBDialog(None, _("DB Connection Parameters"), |
| 261 |
|
parameters, message) |
| 262 |
|
return dlg.RunDialog() |
| 263 |
|
|
| 264 |
|
# run_alt_path_dialog: Raise a dialog to ask for an alternative path |
| 265 |
|
# if the shapefile couldn't be found. |
| 266 |
|
# TODO: |
| 267 |
|
# - Store a list of already used alternative paths and return these |
| 268 |
|
# iteratively (using a generator) |
| 269 |
|
# - How do we interact with the user to tell him we used a different |
| 270 |
|
# shapefile (location), mode "check"? The current approach with the |
| 271 |
|
# file dialog is not that comfortable. |
| 272 |
|
# |
| 273 |
|
def run_alt_path_dialog(self, filename, mode = None, second_try = 0): |
| 274 |
|
"""Implemetation of the shapefile_callback while loading sessions. |
| 275 |
|
|
| 276 |
|
This implements two modes: |
| 277 |
|
- search: Search for an alternative path. If available from a |
| 278 |
|
list of alrady known paths, else interactivly by file dialog. |
| 279 |
|
Currently the "second_try" is important since else the user might |
| 280 |
|
be caught in a loop. |
| 281 |
|
- check: Ask the user for confirmation, if a path from list has |
| 282 |
|
been found successful. |
| 283 |
|
|
| 284 |
|
Returns: |
| 285 |
|
- fname: The full path to the (shape) file. |
| 286 |
|
- from_list: Flags if the path was taken from list or entered |
| 287 |
|
manually. |
| 288 |
|
""" |
| 289 |
|
|
| 290 |
|
if mode == "search": |
| 291 |
|
if self.Path('alt_path') == "" or second_try: |
| 292 |
|
dlg = altpathdialog.AltPathFileDialog(filename) |
| 293 |
|
fname = dlg.RunDialog() |
| 294 |
|
if fname is not None: |
| 295 |
|
self.SetPath('alt_path', fname) |
| 296 |
|
from_list = 0 |
| 297 |
|
else: |
| 298 |
|
fname = os.path.join(self.Path('alt_path'), |
| 299 |
|
os.path.basename(filename)) |
| 300 |
|
from_list = 1 |
| 301 |
|
elif mode == "check": |
| 302 |
|
dlg = altpathdialog.AltPathConfirmDialog(filename) |
| 303 |
|
fname = dlg.RunDialog() |
| 304 |
|
if fname is not None: |
| 305 |
|
self.SetPath('alt_path', fname) |
| 306 |
|
from_list = 0 |
| 307 |
|
else: |
| 308 |
|
fname = None |
| 309 |
|
from_list = 0 |
| 310 |
|
return fname, from_list |
| 311 |
|
|
| 312 |
|
|
| 313 |
def SaveSession(self): |
def SaveSession(self): |
| 314 |
save_session(self.session, self.session.filename) |
save_session(self.session, self.session.filename) |
| 315 |
|
|
| 316 |
def set_map(self): |
def maps_changed(self, *args): |
| 317 |
if self.session.HasMaps(): |
"""Subscribed to the session's MAPS_CHANGED messages. |
| 318 |
self.top.SetMap(self.session.Maps()[0]) |
|
| 319 |
else: |
Set the toplevel window's map to the map in the session. This is |
| 320 |
self.top.SetMap(None) |
done by calling the window's SetMap method with the map as |
| 321 |
|
argument. If the session doesn't have any maps None is used |
| 322 |
|
instead. |
| 323 |
|
|
| 324 |
|
Currently Thuban can only really handle at most one map in a |
| 325 |
|
sessions so the first map in the session's list of maps as |
| 326 |
|
returned by the Maps method is used. |
| 327 |
|
""" |
| 328 |
|
# The mainwindow may not have been created yet, so check whether |
| 329 |
|
# it has been created before calling any of its methods |
| 330 |
|
if self.top is not None: |
| 331 |
|
if self.session.HasMaps(): |
| 332 |
|
self.top.SetMap(self.session.Maps()[0]) |
| 333 |
|
else: |
| 334 |
|
self.top.SetMap(None) |
| 335 |
|
|
| 336 |
|
in_exception_dialog = 0 # flag: are we already inside the exception dialog? |
| 337 |
|
|
| 338 |
|
def ShowExceptionDialog(self, exc_type, exc_value, exc_traceback): |
| 339 |
|
"""Show a message box with information about an exception. |
| 340 |
|
|
| 341 |
|
The parameters are the usual values describing an exception in |
| 342 |
|
Python, the exception type, the value and the traceback. |
| 343 |
|
|
| 344 |
|
This method can be used as a value for the sys.excepthook. |
| 345 |
|
""" |
| 346 |
|
|
| 347 |
|
if self.in_exception_dialog: |
| 348 |
|
return |
| 349 |
|
self.in_exception_dialog = 1 |
| 350 |
|
while wxIsBusy(): |
| 351 |
|
wxEndBusyCursor() # reset the mouse cursor |
| 352 |
|
|
| 353 |
|
try: |
| 354 |
|
lines = traceback.format_exception(exc_type, exc_value, |
| 355 |
|
exc_traceback) |
| 356 |
|
message = _("An unhandled exception occurred:\n%s\n" |
| 357 |
|
"(please report to" |
| 358 |
|
" http://thuban.intevation.org/bugtracker.html)" |
| 359 |
|
"\n\n%s") % (exc_value, "".join(lines)) |
| 360 |
|
print message |
| 361 |
|
|
| 362 |
|
# We don't use an explicit parent here because this method might |
| 363 |
|
# be called in circumstances where the main window doesn't exist |
| 364 |
|
# anymore. |
| 365 |
|
exceptiondialog.run_exception_dialog(None, message) |
| 366 |
|
|
| 367 |
|
finally: |
| 368 |
|
self.in_exception_dialog = 0 |
| 369 |
|
# delete the last exception info that python keeps in |
| 370 |
|
# sys.last_* because especially last_traceback keeps |
| 371 |
|
# indirect references to all objects bound to local |
| 372 |
|
# variables and this might prevent some object from being |
| 373 |
|
# collected early enough. |
| 374 |
|
sys.last_type = sys.last_value = sys.last_traceback = None |
| 375 |
|
|
Parent Directory
| 
Revision Log
| 
Patch