/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 6 by bh, Tue Aug 28 15:41:52 2001 UTC revision 1782 by bh, Mon Oct 6 17:31:54 2003 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001 by Intevation GmbH  # Copyright (C) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
5    # Frank Koormann <[email protected]>
6  #  #
7  # This program is free software under the GPL (>=v2)  # This program is free software under the GPL (>=v2)
8  # Read the file COPYING coming with Thuban for details.  # Read the file COPYING coming with Thuban for details.
# Line 11  The main window Line 12  The main window
12  """  """
13    
14  __version__ = "$Revision$"  __version__ = "$Revision$"
15    # $Source$
16    # $Id$
17    
18  import sys, os  import os
19    import copy
20    
21  from wxPython.wx import *  from wxPython.wx import *
22    
23  import Thuban  import Thuban
24  from Thuban.Model.session import Session  
25  from Thuban.Model.map import Map  from Thuban import _
26  from Thuban.Model.layer import Layer  from Thuban.Model.messages import TITLE_CHANGED
27  from Thuban.Model.color import Color  from Thuban.Model.session import create_empty_session
28  from Thuban.Model.proj import Projection  from Thuban.Model.layer import Layer, RasterLayer
29    from Thuban.Model.postgisdb import PostGISShapeStore, has_postgis_support
30    # XXX: replace this by
31    # from wxPython.lib.dialogs import wxMultipleChoiceDialog
32    # when Thuban does not support wxPython 2.4.0 any more.
33    from Thuban.UI.multiplechoicedialog import wxMultipleChoiceDialog
34    
35  import view  import view
36  import tree  import tree
 import proj4dialog  
37  import tableview, identifyview  import tableview, identifyview
38    from Thuban.UI.classifier import Classifier
39    import legend
40    from menu import Menu
41    
42    from context import Context
43    from command import registry, Command, ToolCommand
44    from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION, \
45         MAP_REPLACED
46    from about import About
47    
48    from Thuban.UI.dock import DockFrame
49    from Thuban.UI.join import JoinDialog
50    from Thuban.UI.dbdialog import DBFrame, DBDialog, ChooseDBTableDialog
51    import resource
52    import Thuban.Model.resource
53    
54    import projdialog
55    
56    
57    class MainWindow(DockFrame):
58    
59        # Some messages that can be subscribed/unsubscribed directly through
60        # the MapCanvas come in fact from other objects. This is a map to
61        # map those messages to the names of the instance variables they
62        # actually come from. This delegation is implemented in the
63        # Subscribe and unsubscribed methods
64        delegated_messages = {LAYER_SELECTED: "canvas",
65                              SHAPES_SELECTED: "canvas",
66                              MAP_REPLACED: "canvas"}
67    
68        # Methods delegated to some instance variables. The delegation is
69        # implemented in the __getattr__ method.
70        delegated_methods = {"SelectLayer": "canvas",
71                             "SelectShapes": "canvas",
72                             "SelectedLayer": "canvas",
73                             "SelectedShapes": "canvas",
74                             }
75    
76        def __init__(self, parent, ID, title, application, interactor,
77                     initial_message = None, size = wxSize(-1, -1)):
78            DockFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
79            #wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
80    
81  import main          self.application = application
 from command import registry, Command  
   
   
 # the directory where the toolbar icons are stored  
 bitmapdir = os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Bitmaps")  
 bitmapext = ".xpm"  
   
   
 class MainWindow(wxFrame):  
   
     def __init__(self, parent, ID):  
         wxFrame.__init__(self, parent, ID, 'Thuban',  
                          wxDefaultPosition, wxSize(400, 300))  
82    
83          self.CreateStatusBar()          self.CreateStatusBar()
84          self.SetStatusText("This is the wxPython-based "          if initial_message:
85                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
86    
87          self.identify_view = None          self.identify_view = None
88    
89          self.init_ids()          self.init_ids()
90    
91          menuBar = wxMenuBar()          # creat the menubar from the main_menu description
92            self.SetMenuBar(self.build_menu_bar(main_menu))
93    
94          menu = wxMenu()          # Similarly, create the toolbar from main_toolbar
95          menuBar.Append(menu, "&File");          toolbar = self.build_toolbar(main_toolbar)
96          for name in ["new_session", "open_session", None,          # call Realize to make sure that the tools appear.
97                       "save_session", "save_session_as", None,          toolbar.Realize()
                      "exit"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Map");  
         for name in ["map_projection",  
                      None,  
                      "map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool",  
                      None,  
                      "map_full_extent",  
                      None,  
                      "map_print"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Layer");  
         for name in ["layer_add", "layer_remove",  
                      None,  
                      "layer_fill_color", "layer_transparent_fill",  
                      "layer_ourline_color", "layer_no_outline",  
                      None,  
                      "layer_raise", "layer_lower",  
                      None,  
                      "layer_show", "layer_hide",  
                      None,  
                      "layer_show_table"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Help");  
         self.add_menu_command(menu, "help_about")  
98    
         self.SetMenuBar(menuBar)  
   
         # toolbar  
         toolbar = self.CreateToolBar(wxTB_3DBUTTONS)  
         for name in ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool"]:  
             self.add_toolbar_command(toolbar, name)  
99    
100          # Create the map canvas          # Create the map canvas
101          canvas = view.MapCanvas(self, -1)          canvas = view.MapCanvas(self, -1)
102            canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
103            canvas.Subscribe(SHAPES_SELECTED, self.identify_view_on_demand)
104          self.canvas = canvas          self.canvas = canvas
105            self.canvas.Subscribe(TITLE_CHANGED, self.title_changed)
106    
107            self.SetMainWindow(self.canvas)
108    
109            self.SetAutoLayout(True)
110    
111            self.init_dialogs()
112    
113            self.ShowLegend()
114    
115          EVT_CLOSE(self, self.OnClose)          EVT_CLOSE(self, self.OnClose)
116    
117        def Subscribe(self, channel, *args):
118            """Subscribe a function to a message channel.
119    
120            If channel is one of the delegated messages call the appropriate
121            object's Subscribe method. Otherwise do nothing.
122            """
123            if channel in self.delegated_messages:
124                object = getattr(self, self.delegated_messages[channel])
125                object.Subscribe(channel, *args)
126            else:
127                print "Trying to subscribe to unsupported channel %s" % channel
128    
129        def Unsubscribe(self, channel, *args):
130            """Unsubscribe a function from a message channel.
131    
132            If channel is one of the delegated messages call the appropriate
133            object's Unsubscribe method. Otherwise do nothing.
134            """
135            if channel in self.delegated_messages:
136                object = getattr(self, self.delegated_messages[channel])
137                object.Unsubscribe(channel, *args)
138    
139        def __getattr__(self, attr):
140            """If attr is one of the delegated methods return that method
141    
142            Otherwise raise AttributeError.
143            """
144            if attr in self.delegated_methods:
145                return getattr(getattr(self, self.delegated_methods[attr]), attr)
146            raise AttributeError(attr)
147    
148      def init_ids(self):      def init_ids(self):
149          """Initialize the ids"""          """Initialize the ids"""
150          self.current_id = 6000          self.current_id = 6000
151          self.id_to_name = {}          self.id_to_name = {}
152          self.name_to_id = {}          self.name_to_id = {}
153            self.events_bound = {}
154    
155      def get_id(self, name):      def get_id(self, name):
156          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 121  class MainWindow(wxFrame): Line 163  class MainWindow(wxFrame):
163              self.name_to_id[name] = ID              self.name_to_id[name] = ID
164              self.id_to_name[ID] = name              self.id_to_name[ID] = name
165          return ID          return ID
166            
167        def bind_command_events(self, command, ID):
168            """Bind the necessary events for the given command and ID"""
169            if not self.events_bound.has_key(ID):
170                # the events haven't been bound yet
171                EVT_MENU(self, ID, self.invoke_command)
172                if command.IsDynamic():
173                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
174    
175        def build_menu_bar(self, menudesc):
176            """Build and return the menu bar from the menu description"""
177            menu_bar = wxMenuBar()
178    
179            for item in menudesc.items:
180                # here the items must all be Menu instances themselves
181                menu_bar.Append(self.build_menu(item), item.title)
182    
183            return menu_bar
184    
185        def build_menu(self, menudesc):
186            """Return a wxMenu built from the menu description menudesc"""
187            wxmenu = wxMenu()
188            last = None
189            for item in menudesc.items:
190                if item is None:
191                    # a separator. Only add one if the last item was not a
192                    # separator
193                    if last is not None:
194                        wxmenu.AppendSeparator()
195                elif isinstance(item, Menu):
196                    # a submenu
197                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
198                else:
199                    # must the name the name of a command
200                    self.add_menu_command(wxmenu, item)
201                last = item
202            return wxmenu
203    
204        def build_toolbar(self, toolbardesc):
205            """Build and return the main toolbar window from a toolbar description
206    
207            The parameter should be an instance of the Menu class but it
208            should not contain submenus.
209            """
210            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
211    
212            # set the size of the tools' bitmaps. Not needed on wxGTK, but
213            # on Windows, although it doesn't work very well there. It seems
214            # that only 16x16 icons are really supported on windows.
215            # We probably shouldn't hardwire the bitmap size here.
216            toolbar.SetToolBitmapSize(wxSize(24, 24))
217    
218            for item in toolbardesc.items:
219                if item is None:
220                    toolbar.AddSeparator()
221                else:
222                    # assume it's a string.
223                    self.add_toolbar_command(toolbar, item)
224    
225            return toolbar
226    
227      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
228          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
229    
# Line 135  class MainWindow(wxFrame): Line 237  class MainWindow(wxFrame):
237                  ID = self.get_id(name)                  ID = self.get_id(name)
238                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
239                              command.IsCheckCommand())                              command.IsCheckCommand())
240                  EVT_MENU(self, ID, self.invoke_command)                  self.bind_command_events(command, ID)
                 if command.IsDynamic():  
                     EVT_UPDATE_UI(self, ID, self.update_command_ui)  
241              else:              else:
242                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
243    
244      def add_toolbar_command(self, toolbar, name):      def add_toolbar_command(self, toolbar, name):
245          """Add the command with name name to the toolbar toolbar.          """Add the command with name name to the toolbar toolbar.
# Line 154  class MainWindow(wxFrame): Line 254  class MainWindow(wxFrame):
254              command = registry.Command(name)              command = registry.Command(name)
255              if command is not None:              if command is not None:
256                  ID = self.get_id(name)                  ID = self.get_id(name)
257                  filename = os.path.join(bitmapdir, command.Icon()) + bitmapext                  bitmap = resource.GetBitmapResource(command.Icon(),
258                  bitmap = wxBitmap(filename, wxBITMAP_TYPE_XPM)                                                      wxBITMAP_TYPE_XPM)
259                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
260                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
261                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
262                    self.bind_command_events(command, ID)
263              else:              else:
264                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
265    
266        def Context(self):
267            """Return the context object for a command invoked from this window
268            """
269            return Context(self.application, self.application.Session(), self)
270    
271      def invoke_command(self, event):      def invoke_command(self, event):
272          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
273          if name is not None:          if name is not None:
274              command = registry.Command(name)              command = registry.Command(name)
275              command.Execute(self)              command.Execute(self.Context())
276          else:          else:
277              print "Unknown command ID %d" % event.GetId()              print _("Unknown command ID %d") % event.GetId()
278    
279      def update_command_ui(self, event):      def update_command_ui(self, event):
280          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
281            context = self.Context()
282          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
283          if command is not None:          if command is not None:
284              event.Enable(command.Sensitive(self))              sensitive = command.Sensitive(context)
285              event.Check(command.Checked(self))              event.Enable(sensitive)
286              event.SetText(command.DynText(self))              if command.IsTool() and not sensitive and command.Checked(context):
287                    # When a checked tool command is disabled deselect all
288                    # tools. Otherwise the tool would remain active but it
289                    # might lead to errors if the tools stays active. This
290                    # problem occurred in GREAT-ER and this fixes it, but
291                    # it's not clear to me whether this is really the best
292                    # way to do it (BH, 20021206).
293                    self.canvas.SelectTool(None)
294                event.SetText(command.DynText(context))
295                if command.IsCheckCommand():
296                        event.Check(command.Checked(context))
297    
298        def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
299            """Run a modal message box with the given text, title and flags
300            and return the result"""
301            dlg = wxMessageDialog(self, text, title, flags)
302            dlg.CenterOnParent()
303            result = dlg.ShowModal()
304            dlg.Destroy()
305            return result
306    
307        def init_dialogs(self):
308            """Initialize the dialog handling"""
309            # The mainwindow maintains a dict mapping names to open
310            # non-modal dialogs. The dialogs are put into this dict when
311            # they're created and removed when they're closed
312            self.dialogs = {}
313    
314        def add_dialog(self, name, dialog):
315            if self.dialogs.has_key(name):
316                raise RuntimeError(_("The Dialog named %s is already open") % name)
317            self.dialogs[name] = dialog
318    
319        def dialog_open(self, name):
320            return self.dialogs.has_key(name)
321    
322        def remove_dialog(self, name):
323            del self.dialogs[name]
324    
325        def get_open_dialog(self, name):
326            return self.dialogs.get(name)
327    
328        def view_position_changed(self):
329            pos = self.canvas.CurrentPosition()
330            if pos is not None:
331                text = "(%10.10g, %10.10g)" % pos
332            else:
333                text = ""
334            self.set_position_text(text)
335    
336        def set_position_text(self, text):
337            """Set the statusbar text showing the current position.
338    
339            By default the text is shown in field 0 of the status bar.
340            Override this method in derived classes to put it into a
341            different field of the statusbar.
342            """
343            self.SetStatusText(text)
344    
345        def save_modified_session(self, can_veto = 1):
346            """If the current session has been modified, ask the user
347            whether to save it and do so if requested. Return the outcome of
348            the dialog (either wxID_OK, wxID_CANCEL or wxID_NO). If the
349            dialog wasn't run return wxID_NO.
350    
351            If the can_veto parameter is true (default) the dialog includes
352            a cancel button, otherwise not.
353            """
354            if self.application.session.WasModified():
355                flags = wxYES_NO | wxICON_QUESTION
356                if can_veto:
357                    flags = flags | wxCANCEL
358                result = self.RunMessageBox(_("Exit"),
359                                            _("The session has been modified."
360                                             " Do you want to save it?"),
361                                            flags)
362                if result == wxID_YES:
363                    self.SaveSession()
364            else:
365                result = wxID_NO
366            return result
367    
368      def NewSession(self):      def NewSession(self):
369          session = Session("")          if self.save_modified_session() != wxID_CANCEL:
370          session.AddMap(Map(""))              self.application.SetSession(create_empty_session())
         main.app.SetSession(session)  
371    
372      def OpenSession(self):      def OpenSession(self):
373          dlg = wxFileDialog(self, "Select a session file", ".", "",          if self.save_modified_session() != wxID_CANCEL:
374                             "*.session", wxOPEN)              dlg = wxFileDialog(self, _("Open Session"), ".", "",
375          if dlg.ShowModal() == wxID_OK:                                 "Thuban Session File (*.thuban)|*.thuban",
376              main.app.OpenSession(dlg.GetPath())                                 wxOPEN)
377          dlg.Destroy()              if dlg.ShowModal() == wxID_OK:
378                    self.application.OpenSession(dlg.GetPath(),
379                                                 self.run_db_param_dialog)
380                dlg.Destroy()
381    
382        def run_db_param_dialog(self, parameters, message):
383            dlg = DBDialog(self, _("DB Connection Parameters"), parameters,
384                           message)
385            return dlg.RunDialog()
386    
387      def SaveSession(self):      def SaveSession(self):
388          main.app.SaveSession()          if self.application.session.filename == None:
389                self.SaveSessionAs()
390            else:
391                self.application.SaveSession()
392    
393      def SaveSessionAs(self):      def SaveSessionAs(self):
394          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, _("Save Session As"), ".", "",
395                             "*.session", wxOPEN)                             "Thuban Session File (*.thuban)|*.thuban",
396                               wxSAVE|wxOVERWRITE_PROMPT)
397          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
398              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
399              main.app.SaveSession()              self.application.SaveSession()
400          dlg.Destroy()          dlg.Destroy()
401    
402      def Exit(self):      def Exit(self):
403          self.Close(false)          self.Close(False)
404    
405      def OnClose(self, event):      def OnClose(self, event):
406          veto = 0          result = self.save_modified_session(can_veto = event.CanVeto())
407          if main.app.session.WasModified():          if result == wxID_CANCEL:
             flags = wxYES_NO | wxICON_QUESTION  
             if event.CanVeto():  
                 flags = flags | wxCANCEL  
             dlg = wxMessageDialog(self,  
                                   ("The session has been modified."  
                                    " Do you want to save it?"),  
                                   "Exit", flags)  
             result = dlg.ShowModal()  
             dlg.Destroy()  
             if result == wxID_YES:  
                 self.SaveSession()  
             elif result == wxID_CANCEL:  
                 veto = 1  
   
         if veto:  
408              event.Veto()              event.Veto()
409          else:          else:
410                # FIXME: it would be better to tie the unsubscription to
411                # wx's destroy event, but that isn't implemented for wxGTK
412                # yet.
413                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
414                DockFrame.OnClose(self, event)
415                for dlg in self.dialogs.values():
416                    dlg.Destroy()
417                self.canvas.Destroy()
418              self.Destroy()              self.Destroy()
419    
420      def SetMap(self, map):      def SetMap(self, map):
421          self.canvas.SetMap(map)          self.canvas.SetMap(map)
422            self.update_title()
423    
424            dialog = self.FindRegisteredDock("legend")
425            if dialog is not None:
426                dialog.GetPanel().SetMap(self.Map())
427    
428        def Map(self):
429            """Return the map displayed by this mainwindow"""
430    
431            return self.canvas.Map()
432    
433        def ToggleSessionTree(self):
434            """If the session tree is shown close it otherwise create a new tree"""
435            name = "session_tree"
436            dialog = self.get_open_dialog(name)
437            if dialog is None:
438                dialog = tree.SessionTreeView(self, self.application, name)
439                self.add_dialog(name, dialog)
440                dialog.Show(True)
441            else:
442                dialog.Close()
443    
444        def SessionTreeShown(self):
445            """Return true iff the session tree is currently shown"""
446            return self.get_open_dialog("session_tree") is not None
447    
448      def About(self):      def About(self):
449          dlg = wxMessageDialog(self,          dlg = About(self)
                               ("Thuban is a program for\n"  
                                "exploring geographic data.\n"  
                                "Copyright (C) 2001 Intevation GmbH.\n"  
                                "Thuban is licensed under the GPL"),  
                               "About", wxOK | wxICON_INFORMATION)  
450          dlg.ShowModal()          dlg.ShowModal()
451          dlg.Destroy()          dlg.Destroy()
452    
453        def DatabaseManagement(self):
454            name = "dbmanagement"
455            dialog = self.get_open_dialog(name)
456            if dialog is None:
457                map = self.canvas.Map()
458                dialog = DBFrame(self, name, self.application.Session())
459                self.add_dialog(name, dialog)
460                dialog.Show()
461            dialog.Raise()
462    
463      def AddLayer(self):      def AddLayer(self):
464          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, _("Select one or more data files"), ".", "",
465                               _("Shapefiles (*.shp)") + "|*.shp|" +
466                               _("All Files (*.*)") + "|*.*",
467                               wxOPEN | wxMULTIPLE)
468            if dlg.ShowModal() == wxID_OK:
469                filenames = dlg.GetPaths()
470                for filename in filenames:
471                    title = os.path.splitext(os.path.basename(filename))[0]
472                    map = self.canvas.Map()
473                    has_layers = map.HasLayers()
474                    try:
475                        store = self.application.Session().OpenShapefile(filename)
476                    except IOError:
477                        # the layer couldn't be opened
478                        self.RunMessageBox(_("Add Layer"),
479                                           _("Can't open the file '%s'.")%filename)
480                    else:
481                        layer = Layer(title, store)
482                        map.AddLayer(layer)
483                        if not has_layers:
484                            # if we're adding a layer to an empty map, fit the
485                            # new map to the window
486                            self.canvas.FitMapToWindow()
487            dlg.Destroy()
488    
489        def AddRasterLayer(self):
490            dlg = wxFileDialog(self, _("Select an image file"), ".", "", "*.*",
491                             wxOPEN)                             wxOPEN)
492          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
493              filename = dlg.GetPath()              filename = dlg.GetPath()
494              title = os.path.splitext(os.path.basename(filename))[0]              title = os.path.splitext(os.path.basename(filename))[0]
495              layer = Layer(title, filename)              map = self.canvas.Map()
496              self.canvas.Map().AddLayer(layer)              has_layers = map.HasLayers()
497                try:
498                    layer = RasterLayer(title, filename)
499                except IOError:
500                    # the layer couldn't be opened
501                    self.RunMessageBox(_("Add Image Layer"),
502                                       _("Can't open the file '%s'.") % filename)
503                else:
504                    map.AddLayer(layer)
505                    if not has_layers:
506                        # if we're adding a layer to an empty map, fit the
507                        # new map to the window
508                        self.canvas.FitMapToWindow()
509            dlg.Destroy()
510    
511        def AddDBLayer(self):
512            """Add a layer read from a database"""
513            session = self.application.Session()
514            dlg = ChooseDBTableDialog(self, self.application.Session())
515    
516            if dlg.ShowModal() == wxID_OK:
517                dbconn, dbtable = dlg.GetTable()
518                try:
519                    title = str(dbtable)
520    
521                    # Chose the correct Interface for the database type
522                    store = PostGISShapeStore(dbconn, dbtable)
523                    session.AddShapeStore(store)
524                    layer = Layer(title, store)
525                except:
526                    # Some error occured while initializing the layer
527                    self.RunMessageBox(_("Add Layer from database"),
528                                       _("Can't open the database table '%s'")
529                                       % dbtable)
530    
531                map = self.canvas.Map()
532    
533                has_layers = map.HasLayers()
534                map.AddLayer(layer)
535                if not has_layers:
536                    self.canvas.FitMapToWindow()
537    
538          dlg.Destroy()          dlg.Destroy()
539    
540      def RemoveLayer(self):      def RemoveLayer(self):
541          layer = self.current_layer()          layer = self.current_layer()
542          if layer is not None:          if layer is not None:
543              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
544          else:  
545              dlg = wxMessageDialog(self, "No layer is selected.\n",      def CanRemoveLayer(self):
546                                    "Remove layer", wxOK | wxICON_INFORMATION)          """Return true if the currently selected layer can be deleted.
547              dlg.ShowModal()  
548              dlg.Destroy()          If no layer is selected return False.
549    
550            The return value of this method determines whether the remove
551            layer command is sensitive in menu.
552            """
553            layer = self.current_layer()
554            if layer is not None:
555                return self.canvas.Map().CanRemoveLayer(layer)
556            return False
557    
558      def RaiseLayer(self):      def RaiseLayer(self):
559          layer = self.current_layer()          layer = self.current_layer()
560          if layer is not None:          if layer is not None:
561              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
562            
563      def LowerLayer(self):      def LowerLayer(self):
564          layer = self.current_layer()          layer = self.current_layer()
565          if layer is not None:          if layer is not None:
# Line 274  class MainWindow(wxFrame): Line 570  class MainWindow(wxFrame):
570    
571          If no layer is selected, return None          If no layer is selected, return None
572          """          """
573          tree = main.app.tree.tree          return self.canvas.SelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         if isinstance(layer, Layer):  
             return layer  
         return None  
574    
575      def has_selected_layer(self):      def has_selected_layer(self):
576          """Return true if a layer is currently selected"""          """Return true if a layer is currently selected"""
577          tree = main.app.tree.tree          return self.canvas.HasSelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         return isinstance(layer, Layer)  
578    
579      def choose_color(self):      def has_selected_shapes(self):
580          """Run the color selection dialog and return the selected color.          """Return true if a shape is currently selected"""
581            return self.canvas.HasSelectedShapes()
582    
583          If the user cancels, return None.      def HideLayer(self):
         """  
         dlg = wxColourDialog(self)  
         color = None  
         if dlg.ShowModal() == wxID_OK:  
             data = dlg.GetColourData()  
             wxc = data.GetColour()  
             color = Color(wxc.Red() / 255.0,  
                           wxc.Green() / 255.0,  
                           wxc.Blue() / 255.0)  
         dlg.Destroy()  
         return color  
   
     def LayerFillColor(self):  
584          layer = self.current_layer()          layer = self.current_layer()
585          if layer is not None:          if layer is not None:
586              color = self.choose_color()              layer.SetVisible(0)
             if color is not None:  
                 layer.SetFill(color)  
587    
588      def LayerTransparentFill(self):      def ShowLayer(self):
589          layer = self.current_layer()          layer = self.current_layer()
590          if layer is not None:          if layer is not None:
591              layer.SetFill(None)              layer.SetVisible(1)
592    
593      def LayerOutlineColor(self):      def DuplicateLayer(self):
594            """Ceate a new layer above the selected layer with the same shapestore
595            """
596          layer = self.current_layer()          layer = self.current_layer()
597          if layer is not None:          if layer is not None and hasattr(layer, "ShapeStore"):
598              color = self.choose_color()              new_layer = Layer(_("Copy of `%s'") % layer.Title(),
599              if color is not None:                                layer.ShapeStore(),
600                  layer.SetStroke(color)                                projection = layer.GetProjection())
601                new_classification = copy.deepcopy(layer.GetClassification())
602                new_layer.SetClassification(new_classification)
603                self.Map().AddLayer(new_layer)
604    
605      def LayerNoOutline(self):      def CanDuplicateLayer(self):
606            """Return whether the DuplicateLayer method can create a duplicate"""
607          layer = self.current_layer()          layer = self.current_layer()
608          if layer is not None:          return layer is not None and hasattr(layer, "ShapeStore")
             layer.SetStroke(None)  
609    
610      def HideLayer(self):      def LayerShowTable(self):
611          layer = self.current_layer()          layer = self.current_layer()
612          if layer is not None:          if layer is not None:
613              layer.SetVisible(0)              table = layer.ShapeStore().Table()
614                        name = "table_view" + str(id(table))
615      def ShowLayer(self):              dialog = self.get_open_dialog(name)
616                if dialog is None:
617                    dialog = tableview.LayerTableFrame(self, name,
618                                             _("Layer Table: %s") % layer.Title(),
619                                             layer, table)
620                    self.add_dialog(name, dialog)
621                    dialog.Show(True)
622                else:
623                    # FIXME: bring dialog to front here
624                    pass
625    
626        def MapProjection(self):
627    
628            name = "map_projection"
629            dialog = self.get_open_dialog(name)
630    
631            if dialog is None:
632                map = self.canvas.Map()
633                dialog = projdialog.ProjFrame(self, name,
634                         _("Map Projection: %s") % map.Title(), map)
635                self.add_dialog(name, dialog)
636                dialog.Show()
637            dialog.Raise()
638    
639        def LayerProjection(self):
640    
641          layer = self.current_layer()          layer = self.current_layer()
         if layer is not None:  
             layer.SetVisible(1)  
642    
643      def LayerShowTable(self):          name = "layer_projection" + str(id(layer))
644            dialog = self.get_open_dialog(name)
645    
646            if dialog is None:
647                map = self.canvas.Map()
648                dialog = projdialog.ProjFrame(self, name,
649                         _("Layer Projection: %s") % layer.Title(), layer)
650                self.add_dialog(name, dialog)
651                dialog.Show()
652            dialog.Raise()
653    
654        def LayerEditProperties(self):
655    
656            #
657            # the menu option for this should only be available if there
658            # is a current layer, so we don't need to check if the
659            # current layer is None
660            #
661    
662          layer = self.current_layer()          layer = self.current_layer()
663            self.OpenLayerProperties(layer)
664    
665        def OpenLayerProperties(self, layer, group = None):
666            name = "layer_properties" + str(id(layer))
667            dialog = self.get_open_dialog(name)
668    
669            if dialog is None:
670                dialog = Classifier(self, name, self.Map(), layer, group)
671                self.add_dialog(name, dialog)
672                dialog.Show()
673            dialog.Raise()
674    
675        def LayerJoinTable(self):
676            layer = self.canvas.SelectedLayer()
677          if layer is not None:          if layer is not None:
678              tv = tableview.TableFrame(self, layer.table)              dlg = JoinDialog(self, _("Join Layer with Table"),
679              tv.Show(true)                               self.application.session,
680                                 layer = layer)
681                dlg.ShowModal()
682    
683      def Projection(self):      def LayerUnjoinTable(self):
684          map = self.canvas.Map()          layer = self.canvas.SelectedLayer()
685          proj = map.projection          if layer is not None:
686          if proj is None:              orig_store = layer.ShapeStore().OrigShapeStore()
687              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None)              if orig_store:
688          else:                  layer.SetShapeStore(orig_store)
689              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params)  
690          if proj4Dlg.ShowModal() == wxID_OK:      def ShowLegend(self):
691              params = proj4Dlg.GetParams()          if not self.LegendShown():
692              if params is not None:              self.ToggleLegend()
693                  proj = Projection(params)  
694        def ToggleLegend(self):
695            """Show the legend if it's not shown otherwise hide it again"""
696            name = "legend"
697            dialog = self.FindRegisteredDock(name)
698    
699            if dialog is None:
700                dialog = self.CreateDock(name, -1, _("Legend"), wxLAYOUT_LEFT)
701                legend.LegendPanel(dialog, None, self)
702                dialog.Dock()
703                dialog.GetPanel().SetMap(self.Map())
704                dialog.Show()
705            else:
706                dialog.Show(not dialog.IsShown())
707    
708        def LegendShown(self):
709            """Return true iff the legend is currently open"""
710            dialog = self.FindRegisteredDock("legend")
711            return dialog is not None and dialog.IsShown()
712    
713        def TableOpen(self):
714            dlg = wxFileDialog(self, _("Open Table"), ".", "",
715                               _("DBF Files (*.dbf)") + "|*.dbf|" +
716                               #_("CSV Files (*.csv)") + "|*.csv|" +
717                               _("All Files (*.*)") + "|*.*",
718                               wxOPEN)
719            if dlg.ShowModal() == wxID_OK:
720                filename = dlg.GetPath()
721                dlg.Destroy()
722                try:
723                    table = self.application.session.OpenTableFile(filename)
724                except IOError:
725                    # the layer couldn't be opened
726                    self.RunMessageBox(_("Open Table"),
727                                       _("Can't open the file '%s'.") % filename)
728              else:              else:
729                  proj = None                  self.ShowTableView(table)
730              map.SetProjection(proj)  
731          proj4Dlg.Destroy()      def TableClose(self):
732            tables = self.application.session.UnreferencedTables()
733    
734            lst = [(t.Title(), t) for t in tables]
735            lst.sort()
736            titles = [i[0] for i in lst]
737            dlg = wxMultipleChoiceDialog(self, _("Pick the tables to close:"),
738                                         _("Close Table"), titles,
739                                         size = (400, 300),
740                                         style = wxDEFAULT_DIALOG_STYLE |
741                                                 wxRESIZE_BORDER)
742            if dlg.ShowModal() == wxID_OK:
743                for i in dlg.GetValue():
744                    self.application.session.RemoveTable(lst[i][1])
745    
746    
747        def TableShow(self):
748            """Offer a multi-selection dialog for tables to be displayed
749    
750            The windows for the selected tables are opened or brought to
751            the front.
752            """
753            tables = self.application.session.Tables()
754    
755            lst = [(t.Title(), t) for t in tables]
756            lst.sort()
757            titles = [i[0] for i in lst]
758            dlg = wxMultipleChoiceDialog(self, _("Pick the table to show:"),
759                                         _("Show Table"), titles,
760                                         size = (400,300),
761                                         style = wxDEFAULT_DIALOG_STYLE |
762                                                 wxRESIZE_BORDER)
763            if (dlg.ShowModal() == wxID_OK):
764                for i in dlg.GetValue():
765                    # XXX: if the table belongs to a layer, open a
766                    # LayerTableFrame instead of QueryTableFrame
767                    self.ShowTableView(lst[i][1])
768    
769        def TableJoin(self):
770            dlg = JoinDialog(self, _("Join Tables"), self.application.session)
771            dlg.ShowModal()
772    
773        def ShowTableView(self, table):
774            """Open a table view for the table and optionally"""
775            name = "table_view%d" % id(table)
776            dialog = self.get_open_dialog(name)
777            if dialog is None:
778                dialog = tableview.QueryTableFrame(self, name,
779                                                   _("Table: %s") % table.Title(),
780                                                   table)
781                self.add_dialog(name, dialog)
782                dialog.Show(True)
783            dialog.Raise()
784    
785        def TableRename(self):
786            """Let the user rename a table"""
787    
788            # First, let the user select a table
789            tables = self.application.session.Tables()
790            lst = [(t.Title(), t) for t in tables]
791            lst.sort()
792            titles = [i[0] for i in lst]
793            dlg = wxMultipleChoiceDialog(self, _("Pick the table to rename:"),
794                                         _("Rename Table"), titles,
795                                         size = (400,300),
796                                         style = wxDEFAULT_DIALOG_STYLE |
797                                                 wxRESIZE_BORDER)
798            if (dlg.ShowModal() == wxID_OK):
799                to_rename = [lst[i][1] for i in dlg.GetValue()]
800                dlg.Destroy()
801            else:
802                to_rename = []
803    
804            # Second, let the user rename the layers
805            for table in to_rename:
806                dlg = wxTextEntryDialog(self, "Table Title: ", "Rename Table",
807                                        table.Title())
808                try:
809                    if dlg.ShowModal() == wxID_OK:
810                        title = dlg.GetValue()
811                        if title != "":
812                            table.SetTitle(title)
813    
814                            # Make sure the session is marked as modified.
815                            # FIXME: This should be handled automatically,
816                            # but that requires more changes to the tables
817                            # than I have time for currently.
818                            self.application.session.changed()
819                finally:
820                    dlg.Destroy()
821    
822    
823      def ZoomInTool(self):      def ZoomInTool(self):
824          self.canvas.ZoomInTool()          self.canvas.ZoomInTool()
# Line 368  class MainWindow(wxFrame): Line 830  class MainWindow(wxFrame):
830          self.canvas.PanTool()          self.canvas.PanTool()
831    
832      def IdentifyTool(self):      def IdentifyTool(self):
         if self.identify_view is None:  
             self.identify_view = identifyview.IdentifyView(self, main.app)  
             self.identify_view.Show(true)  
833          self.canvas.IdentifyTool()          self.canvas.IdentifyTool()
834            self.identify_view_on_demand(None, None)
835    
836      def LabelTool(self):      def LabelTool(self):
837          self.canvas.LabelTool()          self.canvas.LabelTool()
# Line 379  class MainWindow(wxFrame): Line 839  class MainWindow(wxFrame):
839      def FullExtent(self):      def FullExtent(self):
840          self.canvas.FitMapToWindow()          self.canvas.FitMapToWindow()
841    
842        def FullLayerExtent(self):
843            self.canvas.FitLayerToWindow(self.current_layer())
844    
845        def FullSelectionExtent(self):
846            self.canvas.FitSelectedToWindow()
847    
848        def ExportMap(self):
849            self.canvas.Export()
850    
851      def PrintMap(self):      def PrintMap(self):
852          self.canvas.Print()          self.canvas.Print()
853    
854        def RenameMap(self):
855            dlg = wxTextEntryDialog(self, "Map Title: ", "Rename Map",
856                                    self.Map().Title())
857            if dlg.ShowModal() == wxID_OK:
858                title = dlg.GetValue()
859                if title != "":
860                    self.Map().SetTitle(title)
861    
862            dlg.Destroy()
863    
864        def RenameLayer(self):
865            """Let the user rename the currently selected layer"""
866            layer = self.current_layer()
867            if layer is not None:
868                dlg = wxTextEntryDialog(self, "Layer Title: ", "Rename Layer",
869                                        layer.Title())
870                try:
871                    if dlg.ShowModal() == wxID_OK:
872                        title = dlg.GetValue()
873                        if title != "":
874                            layer.SetTitle(title)
875                finally:
876                    dlg.Destroy()
877    
878        def identify_view_on_demand(self, layer, shapes):
879            """Subscribed to the canvas' SHAPES_SELECTED message
880    
881            If the current tool is the identify tool, at least one shape is
882            selected and the identify dialog is not shown, show the dialog.
883            """
884            # If the selection has become empty we don't need to do
885            # anything. Otherwise it could happen that the dialog was popped
886            # up when the selection became empty, e.g. when a new selection
887            # is opened while the identify tool is active and dialog had
888            # been closed
889            if not shapes:
890                return
891    
892            name = "identify_view"
893            if self.canvas.CurrentTool() == "IdentifyTool":
894                if not self.dialog_open(name):
895                    dialog = identifyview.IdentifyView(self, name)
896                    self.add_dialog(name, dialog)
897                    dialog.Show(True)
898                else:
899                    # FIXME: bring dialog to front?
900                    pass
901    
902        def title_changed(self, map):
903            """Subscribed to the canvas' TITLE_CHANGED messages"""
904            self.update_title()
905    
906        def update_title(self):
907            """Update the window's title according to it's current state.
908    
909            In this default implementation the title is 'Thuban - ' followed
910            by the map's title or simply 'Thuban' if there is not map.
911            Derived classes should override this method to get different
912            titles.
913    
914            This method is called automatically by other methods when the
915            title may have to change. For the methods implemented in this
916            class this usually only means that a different map has been set
917            or the current map's title has changed.
918            """
919            map = self.Map()
920            if map is not None:
921                title = _("Thuban - %s") % (map.Title(),)
922            else:
923                title = _("Thuban")
924            self.SetTitle(title)
925    
926    
927  #  #
928  # Define all the commands available in the main window  # Define all the commands available in the main window
# Line 390  class MainWindow(wxFrame): Line 931  class MainWindow(wxFrame):
931    
932  # Helper functions to define common command implementations  # Helper functions to define common command implementations
933  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
934      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
935      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
936    
937  def _method_command(name, title, method, helptext = "", sensitive = None):  def _method_command(name, title, method, helptext = "",
938      """Add a command implemented by a method of the context object"""                      icon = "", sensitive = None, checked = None):
939        """Add a command implemented by a method of the mainwindow object"""
940      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
941                           helptext = helptext, sensitive = sensitive))                           helptext = helptext, icon = icon,
942                             sensitive = sensitive, checked = checked))
943    
944    def make_check_current_tool(toolname):
945        """Return a function that tests if the currently active tool is toolname
946    
947        The returned function can be called with the context and returns
948        true iff the currently active tool's name is toolname. It's directly
949        usable as the 'checked' callback of a command.
950        """
951        def check_current_tool(context, name=toolname):
952            return context.mainwindow.canvas.CurrentTool() == name
953        return check_current_tool
954    
955  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
956                    icon = ""):                    icon = "", sensitive = None):
957      """Add a tool command"""      """Add a tool command"""
958      def check_current_tool(context, name=toolname):      registry.Add(ToolCommand(name, title, call_method, args=(method,),
959          return context.canvas.CurrentTool() == name                               helptext = helptext, icon = icon,
960      registry.Add(Command(name, title, call_method, args=(method,),                               checked = make_check_current_tool(toolname),
961                           helptext = helptext, icon = icon,                               sensitive = sensitive))
                          checked = check_current_tool))  
962    
963  def _has_selected_layer(context):  def _has_selected_layer(context):
964      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
965      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
966    
967    def _has_selected_shapes(context):
968        """Return true if a layer is selected in the context"""
969        return context.mainwindow.has_selected_shapes()
970    
971    def _can_remove_layer(context):
972        return context.mainwindow.CanRemoveLayer()
973    
974    def _has_tree_window_shown(context):
975        """Return true if the tree window is shown"""
976        return context.mainwindow.SessionTreeShown()
977    
978    def _has_visible_map(context):
979        """Return true iff theres a visible map in the mainwindow.
980    
981        A visible map is a map with at least one visible layer."""
982        map = context.mainwindow.Map()
983        if map is not None:
984            for layer in map.Layers():
985                if layer.Visible():
986                    return 1
987        return 0
988    
989    def _has_legend_shown(context):
990        """Return true if the legend window is shown"""
991        return context.mainwindow.LegendShown()
992    
993    def _has_gdal_support(context):
994        """Return True if the GDAL is available"""
995        return Thuban.Model.resource.has_gdal_support()
996    
997    def _has_dbconnections(context):
998        """Return whether the the session has database connections"""
999        return context.session.HasDBConnections()
1000    
1001    def _has_postgis_support(context):
1002        return has_postgis_support()
1003    
1004    
1005  # File menu  # File menu
1006  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", _("&New Session"), "NewSession",
1007  _method_command("open_session", "&Open Session", "OpenSession")                  helptext = _("Start a new session"))
1008  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("open_session", _("&Open Session..."), "OpenSession",
1009  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")                  helptext = _("Open a session file"))
1010  _method_command("exit", "&Exit", "Exit")  _method_command("save_session", _("&Save Session"), "SaveSession",
1011                    helptext =_("Save this session to the file it was opened from"))
1012    _method_command("save_session_as", _("Save Session &As..."), "SaveSessionAs",
1013                    helptext = _("Save this session to a new file"))
1014    _method_command("toggle_session_tree", _("Session &Tree"), "ToggleSessionTree",
1015                    checked = _has_tree_window_shown,
1016                    helptext = _("Toggle on/off the session tree analysis window"))
1017    _method_command("toggle_legend", _("Legend"), "ToggleLegend",
1018                    checked = _has_legend_shown,
1019                    helptext = _("Toggle Legend on/off"))
1020    _method_command("database_management", _("&Database Connections..."),
1021                    "DatabaseManagement",
1022                    sensitive = _has_postgis_support)
1023    _method_command("exit", _("E&xit"), "Exit",
1024                    helptext = _("Finish working with Thuban"))
1025    
1026  # Help menu  # Help menu
1027  _method_command("help_about", "&About", "About")  _method_command("help_about", _("&About..."), "About",
1028                    helptext = _("Info about Thuban authors, version and modules"))
1029    
1030    
1031  # Map menu  # Map menu
1032  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", _("Pro&jection..."), "MapProjection",
1033                    helptext = _("Set or change the map projection"))
1034    
1035  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", _("&Zoom in"), "ZoomInTool", "ZoomInTool",
1036                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = _("Switch to map-mode 'zoom-in'"), icon = "zoom_in",
1037  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",                sensitive = _has_visible_map)
1038                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")  _tool_command("map_zoom_out_tool", _("Zoom &out"), "ZoomOutTool", "ZoomOutTool",
1039  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",                helptext = _("Switch to map-mode 'zoom-out'"), icon = "zoom_out",
1040                helptext = "Switch to map-mode 'pan'", icon = "pan")                sensitive = _has_visible_map)
1041  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_pan_tool", _("&Pan"), "PanTool", "PanTool",
1042                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = _("Switch to map-mode 'pan'"), icon = "pan",
1043  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",                sensitive = _has_visible_map)
1044                helptext = "Add/Remove labels", icon = "label")  _tool_command("map_identify_tool", _("&Identify"), "IdentifyTool",
1045  _method_command("map_full_extent", "&Full extent", "FullExtent")                "IdentifyTool",
1046  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")                helptext = _("Switch to map-mode 'identify'"), icon = "identify",
1047                  sensitive = _has_visible_map)
1048    _tool_command("map_label_tool", _("&Label"), "LabelTool", "LabelTool",
1049                  helptext = _("Add/Remove labels"), icon = "label",
1050                  sensitive = _has_visible_map)
1051    _method_command("map_full_extent", _("&Full extent"), "FullExtent",
1052                   helptext = _("Zoom to the full map extent"), icon = "fullextent",
1053                  sensitive = _has_visible_map)
1054    _method_command("layer_full_extent", _("&Full layer extent"), "FullLayerExtent",
1055                    helptext = _("Zoom to the full layer extent"),
1056                    icon = "fulllayerextent", sensitive = _has_selected_layer)
1057    _method_command("selected_full_extent", _("&Full selection extent"),
1058                    "FullSelectionExtent",
1059                    helptext = _("Zoom to the full selection extent"),
1060                    icon = "fullselextent", sensitive = _has_selected_shapes)
1061    _method_command("map_export", _("E&xport"), "ExportMap",
1062                    helptext = _("Export the map to file"))
1063    _method_command("map_print", _("Prin&t"), "PrintMap",
1064                    helptext = _("Print the map"))
1065    _method_command("map_rename", _("&Rename..."), "RenameMap",
1066                    helptext = _("Rename the map"))
1067    _method_command("layer_add", _("&Add Layer..."), "AddLayer",
1068                    helptext = _("Add a new layer to the map"))
1069    _method_command("rasterlayer_add", _("&Add Image Layer..."), "AddRasterLayer",
1070                    helptext = _("Add a new image layer to the map"),
1071                    sensitive = _has_gdal_support)
1072    _method_command("layer_add_db", _("Add &Database Layer..."), "AddDBLayer",
1073                    helptext = _("Add a new database layer to active map"),
1074                    sensitive = _has_dbconnections)
1075    _method_command("layer_remove", _("&Remove Layer"), "RemoveLayer",
1076                    helptext = _("Remove selected layer"),
1077                    sensitive = _can_remove_layer)
1078    
1079  # Layer menu  # Layer menu
1080  _method_command("layer_add", "&Add", "AddLayer",  _method_command("layer_projection", _("Pro&jection..."), "LayerProjection",
1081                  helptext = "Add a new layer to active map")                  sensitive = _has_selected_layer,
1082  _method_command("layer_remove", "&Remove", "RemoveLayer",                  helptext = _("Specify projection for selected layer"))
1083                  helptext = "Remove selected layer(s)",  _method_command("layer_duplicate", _("&Duplicate"), "DuplicateLayer",
1084                    helptext = _("Duplicate selected layer"),
1085              sensitive = lambda context: context.mainwindow.CanDuplicateLayer())
1086    _method_command("layer_rename", _("Re&name ..."), "RenameLayer",
1087                    helptext = _("Rename selected layer"),
1088                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
1089  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_raise", _("&Raise"), "RaiseLayer",
1090                  helptext = "Set the fill color of selected layer(s)",                  helptext = _("Raise selected layer"),
1091                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
1092  _method_command("layer_transparent_fill", "&Transparent Fill",  _method_command("layer_lower", _("&Lower"), "LowerLayer",
1093                  "LayerTransparentFill",                  helptext = _("Lower selected layer"),
                 helptext = "Do not fill the selected layer(s)",  
1094                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
1095  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_show", _("&Show"), "ShowLayer",
1096                  helptext = "Set the outline color of selected layer(s)",                  helptext = _("Make selected layer visible"),
1097                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
1098  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_hide", _("&Hide"), "HideLayer",
1099                  helptext = "Do not draw the outline of the selected layer(s)",                  helptext = _("Make selected layer unvisible"),
1100                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
1101  _method_command("layer_raise", "&Raise", "RaiseLayer",  _method_command("layer_show_table", _("Show Ta&ble"), "LayerShowTable",
1102                  helptext = "Raise selected layer(s)",                  helptext = _("Show the selected layer's table"),
                 sensitive = _has_selected_layer)  
 _method_command("layer_lower", "&Lower", "LowerLayer",  
                 helptext = "Lower selected layer(s)",  
                 sensitive = _has_selected_layer)  
 _method_command("layer_show", "&Show", "ShowLayer",  
                 helptext = "Make selected layer(s) visible",  
                 sensitive = _has_selected_layer)  
 _method_command("layer_hide", "&Hide", "HideLayer",  
                 helptext = "Make selected layer(s) unvisible",  
                 sensitive = _has_selected_layer)  
 _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  
                 helptext = "Show the selected layer's table",  
1103                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
1104    _method_command("layer_properties", _("&Properties..."), "LayerEditProperties",
1105                    sensitive = _has_selected_layer,
1106                    helptext = _("Edit the properties of the selected layer"))
1107    _method_command("layer_jointable", _("&Join Table..."), "LayerJoinTable",
1108                    sensitive = _has_selected_layer,
1109                    helptext = _("Join and attach a table to the selected layer"))
1110    
1111    def _can_unjoin(context):
1112        """Return whether the Layer/Unjoin command can be executed.
1113    
1114        This is the case if a layer is selected and that layer has a
1115        shapestore that has an original shapestore.
1116        """
1117        layer = context.mainwindow.SelectedLayer()
1118        if layer is None:
1119            return 0
1120        getstore = getattr(layer, "ShapeStore", None)
1121        if getstore is not None:
1122            return getstore().OrigShapeStore() is not None
1123        else:
1124            return 0
1125    _method_command("layer_unjointable", _("&Unjoin Table..."), "LayerUnjoinTable",
1126                    sensitive = _can_unjoin,
1127                    helptext = _("Undo the last join operation"))
1128    
1129    
1130    def _has_tables(context):
1131        return bool(context.session.Tables())
1132    
1133    # Table menu
1134    _method_command("table_open", _("&Open..."), "TableOpen",
1135                    helptext = _("Open a DBF-table from a file"))
1136    _method_command("table_close", _("&Close..."), "TableClose",
1137           sensitive = lambda context: bool(context.session.UnreferencedTables()),
1138                    helptext = _("Close one or more tables from a list"))
1139    _method_command("table_rename", _("&Rename..."), "TableRename",
1140                    sensitive = _has_tables,
1141                    helptext = _("Rename one or more tables"))
1142    _method_command("table_show", _("&Show..."), "TableShow",
1143                    sensitive = _has_tables,
1144                    helptext = _("Show one or more tables in a dialog"))
1145    _method_command("table_join", _("&Join..."), "TableJoin",
1146                    sensitive = _has_tables,
1147                    helptext = _("Join two tables creating a new one"))
1148    
1149    #  Export only under Windows ...
1150    map_menu = ["layer_add", "layer_add_db", "rasterlayer_add", "layer_remove",
1151                            None,
1152                            "map_rename",
1153                            "map_projection",
1154                            None,
1155                            "map_zoom_in_tool", "map_zoom_out_tool",
1156                            "map_pan_tool",
1157                            "map_full_extent",
1158                            "layer_full_extent",
1159                            "selected_full_extent",
1160                            None,
1161                            "map_identify_tool", "map_label_tool",
1162                            None,
1163                            "toggle_legend",
1164                            None]
1165    if wxPlatform == '__WXMSW__':
1166        map_menu.append("map_export")
1167    map_menu.append("map_print")
1168    
1169    # the menu structure
1170    main_menu = Menu("<main>", "<main>",
1171                     [Menu("file", _("&File"),
1172                           ["new_session", "open_session", None,
1173                            "save_session", "save_session_as", None,
1174                            "database_management", None,
1175                            "toggle_session_tree", None,
1176                            "exit"]),
1177                      Menu("map", _("&Map"), map_menu),
1178                      Menu("layer", _("&Layer"),
1179                           ["layer_rename", "layer_duplicate",
1180                            None,
1181                            "layer_raise", "layer_lower",
1182                            None,
1183                            "layer_show", "layer_hide",
1184                            None,
1185                            "layer_projection",
1186                            None,
1187                            "layer_show_table",
1188                            "layer_jointable",
1189                            "layer_unjointable",
1190                            None,
1191                            "layer_properties"]),
1192                      Menu("table", _("&Table"),
1193                           ["table_open", "table_close", "table_rename",
1194                           None,
1195                           "table_show",
1196                           None,
1197                           "table_join"]),
1198                      Menu("help", _("&Help"),
1199                           ["help_about"])])
1200    
1201    # the main toolbar
1202    
1203    main_toolbar = Menu("<toolbar>", "<toolbar>",
1204                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
1205                         "map_full_extent",
1206                         "layer_full_extent",
1207                         "selected_full_extent",
1208                         None,
1209                         "map_identify_tool", "map_label_tool"])
1210    
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