/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 110 by jan, Sun Apr 21 17:28:16 2002 UTC revision 487 by jonathan, Fri Mar 7 18:21:03 2003 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001 by Intevation GmbH  # Copyright (C) 2001, 2002 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]>
# Line 12  The main window Line 12  The main window
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    
15  import sys, os  import os
16    
17  from wxPython.wx import *  from wxPython.wx import *
18    
19  import Thuban  import Thuban
20  from Thuban.Model.session import Session, create_empty_session  from Thuban import _
21  from Thuban.Model.map import Map  from Thuban.Model.session import create_empty_session
22  from Thuban.Model.layer import Layer  from Thuban.Model.layer import Layer
23  from Thuban.Model.color import Color  from Thuban.Model.color import Color
24  from Thuban.Model.proj import Projection  from Thuban.Model.proj import Projection
# Line 27  import view Line 27  import view
27  import tree  import tree
28  import proj4dialog  import proj4dialog
29  import tableview, identifyview  import tableview, identifyview
30    import classifier
31    from menu import Menu
32    
33  import main  from context import Context
34  from command import registry, Command  from command import registry, Command, ToolCommand
35  from messages import SELECTED_SHAPE  from messages import SELECTED_SHAPE, VIEW_POSITION
36    
37    
38  # the directory where the toolbar icons are stored  # the directory where the toolbar icons are stored
# Line 40  bitmapext = ".xpm" Line 42  bitmapext = ".xpm"
42    
43  class MainWindow(wxFrame):  class MainWindow(wxFrame):
44    
45      def __init__(self, parent, ID, interactor):      def __init__(self, parent, ID, title, application, interactor,
46          wxFrame.__init__(self, parent, ID, 'Thuban',                   initial_message = None, size = wxSize(-1, -1)):
47                           wxDefaultPosition, wxSize(400, 300))          wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
48    
49            self.application = application
50          self.interactor = interactor          self.interactor = interactor
51    
52          self.CreateStatusBar()          self.CreateStatusBar()
53          self.SetStatusText("This is the wxPython-based "          if initial_message:
54                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
55    
56          self.identify_view = None          self.identify_view = None
57    
58          self.init_ids()          self.init_ids()
59    
60          menuBar = wxMenuBar()          # creat the menubar from the main_menu description
61            self.SetMenuBar(self.build_menu_bar(main_menu))
62    
63          menu = wxMenu()          # Similarly, create the toolbar from main_toolbar
64          menuBar.Append(menu, "&File");          toolbar = self.build_toolbar(main_toolbar)
         for name in ["new_session", "open_session", None,  
                      "save_session", "save_session_as", None,  
                      "exit"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Map");  
         for name in ["layer_add", "layer_remove",  
                      None,  
                      "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_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")  
   
         self.SetMenuBar(menuBar)  
   
         # toolbar  
         toolbar = self.CreateToolBar(wxTB_3DBUTTONS)  
   
         # set the size of the tools' bitmaps. Not needed on wxGTK, but  
         # on Windows. We probably shouldn't hardwire the bitmap size  
         # here  
         toolbar.SetToolBitmapSize(wxSize(24, 24))  
   
         for name in ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool", "map_full_extent"]:  
             self.add_toolbar_command(toolbar, name)  
65          # call Realize to make sure that the tools appear.          # call Realize to make sure that the tools appear.
66          toolbar.Realize()          toolbar.Realize()
67    
68          # Create the map canvas          # Create the map canvas
69          canvas = view.MapCanvas(self, -1, interactor)          canvas = view.MapCanvas(self, -1, interactor)
70            canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
71          self.canvas = canvas          self.canvas = canvas
72    
73          self.init_dialogs()          self.init_dialogs()
# Line 124  class MainWindow(wxFrame): Line 81  class MainWindow(wxFrame):
81          self.current_id = 6000          self.current_id = 6000
82          self.id_to_name = {}          self.id_to_name = {}
83          self.name_to_id = {}          self.name_to_id = {}
84            self.events_bound = {}
85    
86      def get_id(self, name):      def get_id(self, name):
87          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 136  class MainWindow(wxFrame): Line 94  class MainWindow(wxFrame):
94              self.name_to_id[name] = ID              self.name_to_id[name] = ID
95              self.id_to_name[ID] = name              self.id_to_name[ID] = name
96          return ID          return ID
97            
98        def bind_command_events(self, command, ID):
99            """Bind the necessary events for the given command and ID"""
100            if not self.events_bound.has_key(ID):
101                # the events haven't been bound yet
102                EVT_MENU(self, ID, self.invoke_command)
103                if command.IsDynamic():
104                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
105    
106        def build_menu_bar(self, menudesc):
107            """Build and return the menu bar from the menu description"""
108            menu_bar = wxMenuBar()
109    
110            for item in menudesc.items:
111                # here the items must all be Menu instances themselves
112                menu_bar.Append(self.build_menu(item), item.title)
113    
114            return menu_bar
115    
116        def build_menu(self, menudesc):
117            """Return a wxMenu built from the menu description menudesc"""
118            wxmenu = wxMenu()
119            last = None
120            for item in menudesc.items:
121                if item is None:
122                    # a separator. Only add one if the last item was not a
123                    # separator
124                    if last is not None:
125                        wxmenu.AppendSeparator()
126                elif isinstance(item, Menu):
127                    # a submenu
128                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
129                else:
130                    # must the name the name of a command
131                    self.add_menu_command(wxmenu, item)
132                last = item
133            return wxmenu
134    
135        def build_toolbar(self, toolbardesc):
136            """Build and return the main toolbar window from a toolbar description
137    
138            The parameter should be an instance of the Menu class but it
139            should not contain submenus.
140            """
141            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
142    
143            # set the size of the tools' bitmaps. Not needed on wxGTK, but
144            # on Windows, although it doesn't work very well there. It seems
145            # that only 16x16 icons are really supported on windows.
146            # We probably shouldn't hardwire the bitmap size here.
147            toolbar.SetToolBitmapSize(wxSize(24, 24))
148    
149            for item in toolbardesc.items:
150                if item is None:
151                    toolbar.AddSeparator()
152                else:
153                    # assume it's a string.
154                    self.add_toolbar_command(toolbar, item)
155    
156            return toolbar
157    
158      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
159          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
160    
# Line 150  class MainWindow(wxFrame): Line 168  class MainWindow(wxFrame):
168                  ID = self.get_id(name)                  ID = self.get_id(name)
169                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
170                              command.IsCheckCommand())                              command.IsCheckCommand())
171                  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)  
172              else:              else:
173                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
174    
175      def add_toolbar_command(self, toolbar, name):      def add_toolbar_command(self, toolbar, name):
176          """Add the command with name name to the toolbar toolbar.          """Add the command with name name to the toolbar toolbar.
# Line 174  class MainWindow(wxFrame): Line 190  class MainWindow(wxFrame):
190                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
191                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
192                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
193                    self.bind_command_events(command, ID)
194              else:              else:
195                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
196    
197        def Context(self):
198            """Return the context object for a command invoked from this window
199            """
200            return Context(self.application, self.application.Session(), self)
201    
202      def invoke_command(self, event):      def invoke_command(self, event):
203          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
204          if name is not None:          if name is not None:
205              command = registry.Command(name)              command = registry.Command(name)
206              command.Execute(self)              command.Execute(self.Context())
207          else:          else:
208              print "Unknown command ID %d" % event.GetId()              print _("Unknown command ID %d") % event.GetId()
209    
210      def update_command_ui(self, event):      def update_command_ui(self, event):
211          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
212            context = self.Context()
213          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
214          if command is not None:          if command is not None:
215              event.Enable(command.Sensitive(self))              sensitive = command.Sensitive(context)
216              event.SetText(command.DynText(self))              event.Enable(sensitive)
217                if command.IsTool() and not sensitive and command.Checked(context):
218                    # When a checked tool command is disabled deselect all
219                    # tools. Otherwise the tool would remain active but it
220                    # might lead to errors if the tools stays active. This
221                    # problem occurred in GREAT-ER and this fixes it, but
222                    # it's not clear to me whether this is really the best
223                    # way to do it (BH, 20021206).
224                    self.canvas.SelectTool(None)
225                event.SetText(command.DynText(context))
226              if command.IsCheckCommand():              if command.IsCheckCommand():
227                  event.Check(command.Checked(self))                      event.Check(command.Checked(context))
228    
229      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
230          """Run a modla message box with the given text, title and flags          """Run a modal message box with the given text, title and flags
231          and return the result"""          and return the result"""
232          dlg = wxMessageDialog(self, text, title, flags)          dlg = wxMessageDialog(self, text, title, flags)
233            dlg.CenterOnParent()
234          result = dlg.ShowModal()          result = dlg.ShowModal()
235          dlg.Destroy()          dlg.Destroy()
236          return result          return result
# Line 211  class MainWindow(wxFrame): Line 244  class MainWindow(wxFrame):
244    
245      def add_dialog(self, name, dialog):      def add_dialog(self, name, dialog):
246          if self.dialogs.has_key(name):          if self.dialogs.has_key(name):
247              raise RuntimeError("The Dialog named %s is already open" % name)              raise RuntimeError(_("The Dialog named %s is already open") % name)
248          self.dialogs[name] = dialog          self.dialogs[name] = dialog
249    
250      def dialog_open(self, name):      def dialog_open(self, name):
# Line 223  class MainWindow(wxFrame): Line 256  class MainWindow(wxFrame):
256      def get_open_dialog(self, name):      def get_open_dialog(self, name):
257          return self.dialogs.get(name)          return self.dialogs.get(name)
258    
259        def view_position_changed(self):
260            pos = self.canvas.CurrentPosition()
261            if pos is not None:
262                text = "(%10.10g, %10.10g)" % pos
263            else:
264                text = ""
265            self.set_position_text(text)
266    
267        def set_position_text(self, text):
268            """Set the statusbar text showing the current position.
269    
270            By default the text is shown in field 0 of the status bar.
271            Override this method in derived classes to put it into a
272            different field of the statusbar.
273            """
274            self.SetStatusText(text)
275    
276      def save_modified_session(self, can_veto = 1):      def save_modified_session(self, can_veto = 1):
277          """If the current session has been modified, ask the user          """If the current session has been modified, ask the user
278          whether to save it and do so if requested. Return the outcome of          whether to save it and do so if requested. Return the outcome of
# Line 232  class MainWindow(wxFrame): Line 282  class MainWindow(wxFrame):
282          If the can_veto parameter is true (default) the dialog includes          If the can_veto parameter is true (default) the dialog includes
283          a cancel button, otherwise not.          a cancel button, otherwise not.
284          """          """
285          if main.app.session.WasModified():          if self.application.session.WasModified():
286              flags = wxYES_NO | wxICON_QUESTION              flags = wxYES_NO | wxICON_QUESTION
287              if can_veto:              if can_veto:
288                  flags = flags | wxCANCEL                  flags = flags | wxCANCEL
289              result = self.RunMessageBox("Exit",              result = self.RunMessageBox(_("Exit"),
290                                          ("The session has been modified."                                          _("The session has been modified."
291                                           " Do you want to save it?"),                                           " Do you want to save it?"),
292                                          flags)                                          flags)
293              if result == wxID_YES:              if result == wxID_YES:
# Line 246  class MainWindow(wxFrame): Line 296  class MainWindow(wxFrame):
296              result = wxID_NO              result = wxID_NO
297          return result          return result
298    
299        def prepare_new_session(self):
300            for d in self.dialogs.values():
301                if not isinstance(d, tree.SessionTreeView):
302                    d.Shutdown()
303    
304      def NewSession(self):      def NewSession(self):
305          self.save_modified_session()          self.save_modified_session()
306          main.app.SetSession(create_empty_session())          self.prepare_new_session()
307            self.application.SetSession(create_empty_session())
308    
309      def OpenSession(self):      def OpenSession(self):
310          self.save_modified_session()          self.save_modified_session()
311          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, _("Open Session"), ".", "", "*.thuban", wxOPEN)
                            "*.session", wxOPEN)  
312          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
313              main.app.OpenSession(dlg.GetPath())              self.prepare_new_session()
314                self.application.OpenSession(dlg.GetPath())
315          dlg.Destroy()          dlg.Destroy()
316    
317      def SaveSession(self):      def SaveSession(self):
318          if main.app.session.filename == None:          if self.application.session.filename == None:
319              self.SaveSessionAs()              self.SaveSessionAs()
320          main.app.SaveSession()          else:
321                self.application.SaveSession()
322    
323      def SaveSessionAs(self):      def SaveSessionAs(self):
324          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, _("Save Session As"), ".", "",
325                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
326          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
327              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
328              main.app.SaveSession()              self.application.SaveSession()
329          dlg.Destroy()          dlg.Destroy()
330    
331      def Exit(self):      def Exit(self):
# Line 279  class MainWindow(wxFrame): Line 336  class MainWindow(wxFrame):
336          if result == wxID_CANCEL:          if result == wxID_CANCEL:
337              event.Veto()              event.Veto()
338          else:          else:
339                # FIXME: it would be better to tie the unsubscription to
340                # wx's destroy event, but that isn't implemented for wxGTK
341                # yet.
342                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
343              self.Destroy()              self.Destroy()
344    
345      def SetMap(self, map):      def SetMap(self, map):
346          self.canvas.SetMap(map)          self.canvas.SetMap(map)
347    
348        def Map(self):
349            """Return the map displayed by this mainwindow"""
350            return self.canvas.Map()
351    
352      def ShowSessionTree(self):      def ShowSessionTree(self):
353          name = "session_tree"          name = "session_tree"
354          dialog = self.get_open_dialog(name)          dialog = self.get_open_dialog(name)
355          if dialog is None:          if dialog is None:
356              dialog = tree.SessionTreeView(self, main.app, name)              dialog = tree.SessionTreeView(self, self.application, name)
357              self.add_dialog(name, dialog)              self.add_dialog(name, dialog)
358              dialog.Show(true)              dialog.Show(true)
359          else:          else:
# Line 296  class MainWindow(wxFrame): Line 361  class MainWindow(wxFrame):
361              pass              pass
362    
363      def About(self):      def About(self):
364          self.RunMessageBox("About",          self.RunMessageBox(_("About"),
365                             ("Thuban is a program for\n"                             _("Thuban is a program for\n"
366                              "exploring geographic data.\n"                              "exploring geographic data.\n"
367                              "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001-2003 Intevation GmbH.\n"
368                              "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GPL"),
369                             wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
370    
371      def AddLayer(self):      def AddLayer(self):
372          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, _("Select a data file"), ".", "", "*.*",
373                             wxOPEN)                             wxOPEN)
374          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
375              filename = dlg.GetPath()              filename = dlg.GetPath()
# Line 316  class MainWindow(wxFrame): Line 381  class MainWindow(wxFrame):
381                  map.AddLayer(layer)                  map.AddLayer(layer)
382              except IOError:              except IOError:
383                  # the layer couldn't be opened                  # the layer couldn't be opened
384                  self.RunMessageBox("Add Layer",                  self.RunMessageBox(_("Add Layer"),
385                                     "Can't open the file '%s'." % filename)                                     _("Can't open the file '%s'.") % filename)
386              else:              else:
387                  if not has_layers:                  if not has_layers:
388                      # if we're adding a layer to an empty map, for the                      # if we're adding a layer to an empty map, for the
# Line 330  class MainWindow(wxFrame): Line 395  class MainWindow(wxFrame):
395          if layer is not None:          if layer is not None:
396              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
397    
398        def CanRemoveLayer(self):
399            """Return true if the currently selected layer can be deleted.
400    
401            If no layer is selected return false.
402    
403            The return value of this method determines whether the remove
404            layer command is sensitive in menu.
405            """
406            layer = self.current_layer()
407            if layer is not None:
408                return self.canvas.Map().CanRemoveLayer(layer)
409            return 0
410    
411      def RaiseLayer(self):      def RaiseLayer(self):
412          layer = self.current_layer()          layer = self.current_layer()
413          if layer is not None:          if layer is not None:
414              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
415            
416      def LowerLayer(self):      def LowerLayer(self):
417          layer = self.current_layer()          layer = self.current_layer()
418          if layer is not None:          if layer is not None:
# Line 372  class MainWindow(wxFrame): Line 450  class MainWindow(wxFrame):
450          if layer is not None:          if layer is not None:
451              color = self.choose_color()              color = self.choose_color()
452              if color is not None:              if color is not None:
453                  layer.SetFill(color)                  layer.GetClassification().SetDefaultFill(color)
454    
455      def LayerTransparentFill(self):      def LayerTransparentFill(self):
456          layer = self.current_layer()          layer = self.current_layer()
457          if layer is not None:          if layer is not None:
458              layer.SetFill(None)              layer.GetClassification().SetDefaultFill(Color.None)
459    
460      def LayerOutlineColor(self):      def LayerOutlineColor(self):
461          layer = self.current_layer()          layer = self.current_layer()
462          if layer is not None:          if layer is not None:
463              color = self.choose_color()              color = self.choose_color()
464              if color is not None:              if color is not None:
465                  layer.SetStroke(color)                  layer.GetClassification().SetDefaultLineColor(color)
466    
467      def LayerNoOutline(self):      def LayerNoOutline(self):
468          layer = self.current_layer()          layer = self.current_layer()
469          if layer is not None:          if layer is not None:
470              layer.SetStroke(None)              layer.GetClassification().SetDefaultLineColor(Color.None)
471    
472      def HideLayer(self):      def HideLayer(self):
473          layer = self.current_layer()          layer = self.current_layer()
# Line 408  class MainWindow(wxFrame): Line 486  class MainWindow(wxFrame):
486              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
487              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
488              if dialog is None:              if dialog is None:
489                  dialog = tableview.TableFrame(self, self.interactor, name,                  dialog = tableview.LayerTableFrame(self, self.interactor, name,
490                                                "Table: %s" % layer.Title(),                                                     _("Table: %s") % layer.Title(),
491                                                layer, table)                                                     layer, table)
492                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
493                  dialog.Show(true)                  dialog.Show(true)
494              else:              else:
# Line 434  class MainWindow(wxFrame): Line 512  class MainWindow(wxFrame):
512              map.SetProjection(proj)              map.SetProjection(proj)
513          proj4Dlg.Destroy()          proj4Dlg.Destroy()
514    
515        def Classify(self):
516    
517            #
518            # the menu option for this should only be available if there
519            # is a current layer, so we don't need to check if the
520            # current layer is None
521            #
522    
523            layer = self.current_layer()
524            name = "classifier" + str(id(layer))
525            dialog = self.get_open_dialog(name)
526    
527            if dialog is None:
528                dialog = classifier.Classifier(self, self.interactor,
529                                               name, self.current_layer())
530                self.add_dialog(name, dialog)
531                dialog.Show()
532    
533      def ZoomInTool(self):      def ZoomInTool(self):
534          self.canvas.ZoomInTool()          self.canvas.ZoomInTool()
535    
# Line 474  class MainWindow(wxFrame): Line 570  class MainWindow(wxFrame):
570    
571  # Helper functions to define common command implementations  # Helper functions to define common command implementations
572  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
573      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
574      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
575    
576  def _method_command(name, title, method, helptext = "",  def _method_command(name, title, method, helptext = "",
577                      icon = "", sensitive = None):                      icon = "", sensitive = None):
578      """Add a command implemented by a method of the context object"""      """Add a command implemented by a method of the mainwindow object"""
579      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
580                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
581                           sensitive = sensitive))                           sensitive = sensitive))
582    
583    def make_check_current_tool(toolname):
584        """Return a function that tests if the currently active tool is toolname
585    
586        The returned function can be called with the context and returns
587        true iff the currently active tool's name is toolname. It's directly
588        usable as the 'checked' callback of a command.
589        """
590        def check_current_tool(context, name=toolname):
591            return context.mainwindow.canvas.CurrentTool() == name
592        return check_current_tool
593    
594  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
595                    icon = ""):                    icon = "", sensitive = None):
596      """Add a tool command"""      """Add a tool command"""
597      def check_current_tool(context, name=toolname):      registry.Add(ToolCommand(name, title, call_method, args=(method,),
598          return context.canvas.CurrentTool() == name                               helptext = helptext, icon = icon,
599      registry.Add(Command(name, title, call_method, args=(method,),                               checked = make_check_current_tool(toolname),
600                           helptext = helptext, icon = icon,                               sensitive = sensitive))
                          checked = check_current_tool))  
601    
602  def _has_selected_layer(context):  def _has_selected_layer(context):
603      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
604      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
605    
606    def _can_remove_layer(context):
607        return context.mainwindow.CanRemoveLayer()
608    
609    def _has_tree_window_shown(context):
610        """Return true if the tree window is shown"""
611        return context.mainwindow.get_open_dialog("session_tree") is None
612    
613    def _has_visible_map(context):
614        """Return true iff theres a visible map in the mainwindow.
615    
616        A visible map is a map with at least one visible layer."""
617        map = context.mainwindow.Map()
618        if map is not None:
619            for layer in map.Layers():
620                if layer.Visible():
621                    return 1
622        return 0
623    
624    
625  # File menu  # File menu
626  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", _("&New Session"), "NewSession")
627  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", _("&Open Session"), "OpenSession")
628  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", _("&Save Session"), "SaveSession")
629  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", _("Save Session &As"), "SaveSessionAs")
630  _method_command("exit", "&Exit", "Exit")  _method_command("show_session_tree", _("Show Session &Tree"), "ShowSessionTree",
631                    sensitive = _has_tree_window_shown)
632    _method_command("exit", _("E&xit"), "Exit")
633    
634  # Help menu  # Help menu
635  _method_command("help_about", "&About", "About")  _method_command("help_about", _("&About"), "About")
636    
637    
638  # Map menu  # Map menu
639  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", _("Pro&jection"), "Projection")
640    
641  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", _("&Zoom in"), "ZoomInTool", "ZoomInTool",
642                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = _("Switch to map-mode 'zoom-in'"), icon = "zoom_in",
643  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",                sensitive = _has_visible_map)
644                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")  _tool_command("map_zoom_out_tool", _("Zoom &out"), "ZoomOutTool", "ZoomOutTool",
645  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",                helptext = _("Switch to map-mode 'zoom-out'"), icon = "zoom_out",
646                helptext = "Switch to map-mode 'pan'", icon = "pan")                sensitive = _has_visible_map)
647  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_pan_tool", _("&Pan"), "PanTool", "PanTool",
648                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = _("Switch to map-mode 'pan'"), icon = "pan",
649  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",                sensitive = _has_visible_map)
650                helptext = "Add/Remove labels", icon = "label")  _tool_command("map_identify_tool", _("&Identify"), "IdentifyTool",
651  #_tool_command("map_full_extent", "&Full extent", "FullExtent", "FullExtent",                "IdentifyTool",
652  #              helptext = "Full Extent", icon = "fullextent")                helptext = _("Switch to map-mode 'identify'"), icon = "identify",
653  _method_command("map_full_extent", "&Full extent", "FullExtent",                sensitive = _has_visible_map)
654                 helptext = "Full Extent", icon = "fullextent")  _tool_command("map_label_tool", _("&Label"), "LabelTool", "LabelTool",
655  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")                helptext = _("Add/Remove labels"), icon = "label",
656                  sensitive = _has_visible_map)
657    _method_command("map_full_extent", _("&Full extent"), "FullExtent",
658                   helptext = _("Full Extent"), icon = "fullextent",
659                  sensitive = _has_visible_map)
660    _method_command("map_print", _("Prin&t"), "PrintMap",
661                    helptext = _("Print the map"))
662    
663  # Layer menu  # Layer menu
664  _method_command("layer_add", "&Add Layer", "AddLayer",  _method_command("layer_add", _("&Add Layer"), "AddLayer",
665                  helptext = "Add a new layer to active map")                  helptext = _("Add a new layer to active map"))
666  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",  _method_command("layer_remove", _("&Remove Layer"), "RemoveLayer",
667                  helptext = "Remove selected layer(s)",                  helptext = _("Remove selected layer(s)"),
668                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
669  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", _("&Fill Color"), "LayerFillColor",
670                  helptext = "Set the fill color of selected layer(s)",                  helptext = _("Set the fill color of selected layer(s)"),
671                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
672  _method_command("layer_transparent_fill", "&Transparent Fill",  _method_command("layer_transparent_fill", _("&Transparent Fill"),
673                  "LayerTransparentFill",                  "LayerTransparentFill",
674                  helptext = "Do not fill the selected layer(s)",                  helptext = _("Do not fill the selected layer(s)"),
675                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
676  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_outline_color", _("&Outline Color"), "LayerOutlineColor",
677                  helptext = "Set the outline color of selected layer(s)",                  helptext = _("Set the outline color of selected layer(s)"),
678                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
679  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_no_outline", _("&No Outline"), "LayerNoOutline",
680                  helptext = "Do not draw the outline of the selected layer(s)",                  helptext= _("Do not draw the outline of the selected layer(s)"),
681                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
682  _method_command("layer_raise", "&Raise", "RaiseLayer",  _method_command("layer_raise", _("&Raise"), "RaiseLayer",
683                  helptext = "Raise selected layer(s)",                  helptext = _("Raise selected layer(s)"),
684                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
685  _method_command("layer_lower", "&Lower", "LowerLayer",  _method_command("layer_lower", _("&Lower"), "LowerLayer",
686                  helptext = "Lower selected layer(s)",                  helptext = _("Lower selected layer(s)"),
687                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
688  _method_command("layer_show", "&Show", "ShowLayer",  _method_command("layer_show", _("&Show"), "ShowLayer",
689                  helptext = "Make selected layer(s) visible",                  helptext = _("Make selected layer(s) visible"),
690                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
691  _method_command("layer_hide", "&Hide", "HideLayer",  _method_command("layer_hide", _("&Hide"), "HideLayer",
692                  helptext = "Make selected layer(s) unvisible",                  helptext = _("Make selected layer(s) unvisible"),
693                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
694  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  _method_command("layer_show_table", _("Show Ta&ble"), "LayerShowTable",
695                  helptext = "Show the selected layer's table",                  helptext = _("Show the selected layer's table"),
696                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
697    
698    _method_command("layer_classifier", _("Classify"), "Classify",
699                    sensitive = _has_selected_layer)
700    
701    # the menu structure
702    main_menu = Menu("<main>", "<main>",
703                     [Menu("file", _("&File"),
704                           ["new_session", "open_session", None,
705                            "save_session", "save_session_as", None,
706                            "show_session_tree", None,
707                            "exit"]),
708                      Menu("map", _("&Map"),
709                           ["layer_add", "layer_remove",
710                            None,
711                            "map_projection",
712                            None,
713                            "map_zoom_in_tool", "map_zoom_out_tool",
714                            "map_pan_tool", "map_identify_tool", "map_label_tool",
715                            None,
716                            "map_full_extent",
717                            None,
718                            "map_print"]),
719                      Menu("layer", _("&Layer"),
720                           ["layer_fill_color", "layer_transparent_fill",
721                            "layer_outline_color", "layer_no_outline",
722                            None,
723                            "layer_raise", "layer_lower",
724                            None,
725                            "layer_show", "layer_hide",
726                            None,
727                            "layer_show_table",
728                            None,
729                            "layer_classifier"]),
730                      Menu("help", _("&Help"),
731                           ["help_about"])])
732    
733    # the main toolbar
734    
735    main_toolbar = Menu("<toolbar>", "<toolbar>",
736                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
737                         "map_full_extent", None,
738                         "map_identify_tool", "map_label_tool"])
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