/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 227 by bh, Thu Jul 18 16:27:11 2002 UTC revision 573 by jonathan, Fri Mar 28 17:07:06 2003 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001, 2002 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]>
# Line 12  The main window Line 12  The main window
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    
15    __ThubanVersion__ = "0.2" #"$THUBAN_0_2$"
16    #__BuildDate__ = "$Date$"
17    
18  import os  import os
19    
20  from wxPython.wx import *  from wxPython.wx import *
21    
22  import Thuban  import Thuban
23    from Thuban import _
24  from Thuban.Model.session import create_empty_session  from Thuban.Model.session import create_empty_session
25  from Thuban.Model.layer import Layer  from Thuban.Model.layer import Layer
26  from Thuban.Model.color import Color  from Thuban.Model.color import Color
# Line 26  import view Line 30  import view
30  import tree  import tree
31  import proj4dialog  import proj4dialog
32  import tableview, identifyview  import tableview, identifyview
33    import classifier
34    import legend
35  from menu import Menu  from menu import Menu
36    
37  from context import Context  from context import Context
38  from command import registry, Command  from command import registry, Command, ToolCommand
39  from messages import SELECTED_SHAPE, VIEW_POSITION  from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION, DOCKABLE_DOCKED, DOCKABLE_UNDOCKED, DOCKABLE_CLOSED
40    
41    from Thuban.UI.dock import DockableWindow, DockFrame, DockPanel
42    
43    
44  # the directory where the toolbar icons are stored  # the directory where the toolbar icons are stored
45  bitmapdir = os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Bitmaps")  bitmapdir = os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Bitmaps")
46  bitmapext = ".xpm"  bitmapext = ".xpm"
47    
48    ID_WINDOW_LEGEND = 4001
49    ID_WINDOW_CANVAS = 4002
50    
51    
52  class MainWindow(wxFrame):  class MainWindow(DockFrame):
53    
54      def __init__(self, parent, ID, application, interactor):      # Some messages that can be subscribed/unsubscribed directly through
55          wxFrame.__init__(self, parent, ID, 'Thuban',      # the MapCanvas come in fact from other objects. This is a map to
56                           wxDefaultPosition, wxSize(400, 300))      # map those messages to the names of the instance variables they
57        # actually come from. This delegation is implemented in the
58        # Subscribe and unsubscribed methods
59        delegated_messages = {LAYER_SELECTED: "canvas",
60                              SHAPES_SELECTED: "canvas"}
61    
62        # Methods delegated to some instance variables. The delegation is
63        # implemented in the __getattr__ method.
64        delegated_methods = {"SelectLayer": "canvas",
65                             "SelectShapes": "canvas",
66                             }
67    
68        def __init__(self, parent, ID, title, application, interactor,
69                     initial_message = None, size = wxSize(-1, -1)):
70            DockFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
71            #wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
72    
73          self.application = application          self.application = application
         self.interactor = interactor  
74    
75          self.CreateStatusBar()          self.CreateStatusBar()
76          self.SetStatusText("This is the wxPython-based "          if initial_message:
77                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
78    
79          self.identify_view = None          self.identify_view = None
80    
# Line 63  class MainWindow(wxFrame): Line 88  class MainWindow(wxFrame):
88          # call Realize to make sure that the tools appear.          # call Realize to make sure that the tools appear.
89          toolbar.Realize()          toolbar.Realize()
90    
91    
92          # Create the map canvas          # Create the map canvas
93          canvas = view.MapCanvas(self, -1, interactor)          canvas = view.MapCanvas(self, -1)
94          canvas.Subscribe(VIEW_POSITION, self.view_position_changed)          canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
95            canvas.Subscribe(SHAPES_SELECTED, self.identify_view_on_demand)
96          self.canvas = canvas          self.canvas = canvas
97    
98          self.init_dialogs()          self.SetMainWindow(self.canvas)
99    
100          interactor.Subscribe(SELECTED_SHAPE, self.identify_view_on_demand)          self.SetAutoLayout(True)
101    
102            self.init_dialogs()
103    
104          EVT_CLOSE(self, self.OnClose)          EVT_CLOSE(self, self.OnClose)
105    
106        def Subscribe(self, channel, *args):
107            """Subscribe a function to a message channel.
108    
109            If channel is one of the delegated messages call the appropriate
110            object's Subscribe method. Otherwise do nothing.
111            """
112            if channel in self.delegated_messages:
113                object = getattr(self, self.delegated_messages[channel])
114                object.Subscribe(channel, *args)
115            else:
116                print "Trying to subscribe to unsupported channel %s" % channel
117    
118        def Unsubscribe(self, channel, *args):
119            """Unsubscribe a function from a message channel.
120    
121            If channel is one of the delegated messages call the appropriate
122            object's Unsubscribe method. Otherwise do nothing.
123            """
124            if channel in self.delegated_messages:
125                object = getattr(self, self.delegated_messages[channel])
126                object.Unsubscribe(channel, *args)
127    
128        def __getattr__(self, attr):
129            """If attr is one of the delegated methods return that method
130    
131            Otherwise raise AttributeError.
132            """
133            if attr in self.delegated_methods:
134                return getattr(getattr(self, self.delegated_methods[attr]), attr)
135            raise AttributeError(attr)
136    
137      def init_ids(self):      def init_ids(self):
138          """Initialize the ids"""          """Initialize the ids"""
139          self.current_id = 6000          self.current_id = 6000
# Line 112  class MainWindow(wxFrame): Line 172  class MainWindow(wxFrame):
172          return menu_bar          return menu_bar
173    
174      def build_menu(self, menudesc):      def build_menu(self, menudesc):
175          """Build and return a wxMenu from a menudescription"""          """Return a wxMenu built from the menu description menudesc"""
176          wxmenu = wxMenu()          wxmenu = wxMenu()
177          last = None          last = None
178          for item in menudesc.items:          for item in menudesc.items:
             # here the items must all be Menu instances themselves  
179              if item is None:              if item is None:
180                  # a separator. Only add one if the last item was not a                  # a separator. Only add one if the last item was not a
181                  # separator                  # separator
# Line 169  class MainWindow(wxFrame): Line 228  class MainWindow(wxFrame):
228                              command.IsCheckCommand())                              command.IsCheckCommand())
229                  self.bind_command_events(command, ID)                  self.bind_command_events(command, ID)
230              else:              else:
231                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
232    
233      def add_toolbar_command(self, toolbar, name):      def add_toolbar_command(self, toolbar, name):
234          """Add the command with name name to the toolbar toolbar.          """Add the command with name name to the toolbar toolbar.
# Line 191  class MainWindow(wxFrame): Line 250  class MainWindow(wxFrame):
250                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
251                  self.bind_command_events(command, ID)                  self.bind_command_events(command, ID)
252              else:              else:
253                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
254    
255        def Context(self):
256            """Return the context object for a command invoked from this window
257            """
258            return Context(self.application, self.application.Session(), self)
259    
260      def invoke_command(self, event):      def invoke_command(self, event):
261          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
262          if name is not None:          if name is not None:
263              command = registry.Command(name)              command = registry.Command(name)
264              context = Context(self.application, self.application.Session(),              command.Execute(self.Context())
                               self)  
             command.Execute(context)  
265          else:          else:
266              print "Unknown command ID %d" % event.GetId()              print _("Unknown command ID %d") % event.GetId()
267    
268      def update_command_ui(self, event):      def update_command_ui(self, event):
269          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
270          context = Context(self.application, self.application.Session(), self)          context = self.Context()
271          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
272          if command is not None:          if command is not None:
273              event.Enable(command.Sensitive(context))              sensitive = command.Sensitive(context)
274                event.Enable(sensitive)
275                if command.IsTool() and not sensitive and command.Checked(context):
276                    # When a checked tool command is disabled deselect all
277                    # tools. Otherwise the tool would remain active but it
278                    # might lead to errors if the tools stays active. This
279                    # problem occurred in GREAT-ER and this fixes it, but
280                    # it's not clear to me whether this is really the best
281                    # way to do it (BH, 20021206).
282                    self.canvas.SelectTool(None)
283              event.SetText(command.DynText(context))              event.SetText(command.DynText(context))
284              if command.IsCheckCommand():              if command.IsCheckCommand():
285                  event.Check(command.Checked(context))                      event.Check(command.Checked(context))
286    
287      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
288          """Run a modal message box with the given text, title and flags          """Run a modal message box with the given text, title and flags
289          and return the result"""          and return the result"""
290          dlg = wxMessageDialog(self, text, title, flags)          dlg = wxMessageDialog(self, text, title, flags)
291            dlg.CenterOnParent()
292          result = dlg.ShowModal()          result = dlg.ShowModal()
293          dlg.Destroy()          dlg.Destroy()
294          return result          return result
# Line 230  class MainWindow(wxFrame): Line 302  class MainWindow(wxFrame):
302    
303      def add_dialog(self, name, dialog):      def add_dialog(self, name, dialog):
304          if self.dialogs.has_key(name):          if self.dialogs.has_key(name):
305              raise RuntimeError("The Dialog named %s is already open" % name)              raise RuntimeError(_("The Dialog named %s is already open") % name)
306          self.dialogs[name] = dialog          self.dialogs[name] = dialog
307    
308      def dialog_open(self, name):      def dialog_open(self, name):
# Line 248  class MainWindow(wxFrame): Line 320  class MainWindow(wxFrame):
320              text = "(%10.10g, %10.10g)" % pos              text = "(%10.10g, %10.10g)" % pos
321          else:          else:
322              text = ""              text = ""
323            self.set_position_text(text)
324    
325        def set_position_text(self, text):
326            """Set the statusbar text showing the current position.
327    
328            By default the text is shown in field 0 of the status bar.
329            Override this method in derived classes to put it into a
330            different field of the statusbar.
331            """
332          self.SetStatusText(text)          self.SetStatusText(text)
333    
334      def save_modified_session(self, can_veto = 1):      def save_modified_session(self, can_veto = 1):
# Line 263  class MainWindow(wxFrame): Line 344  class MainWindow(wxFrame):
344              flags = wxYES_NO | wxICON_QUESTION              flags = wxYES_NO | wxICON_QUESTION
345              if can_veto:              if can_veto:
346                  flags = flags | wxCANCEL                  flags = flags | wxCANCEL
347              result = self.RunMessageBox("Exit",              result = self.RunMessageBox(_("Exit"),
348                                          ("The session has been modified."                                          _("The session has been modified."
349                                           " Do you want to save it?"),                                           " Do you want to save it?"),
350                                          flags)                                          flags)
351              if result == wxID_YES:              if result == wxID_YES:
# Line 273  class MainWindow(wxFrame): Line 354  class MainWindow(wxFrame):
354              result = wxID_NO              result = wxID_NO
355          return result          return result
356    
357        def prepare_new_session(self):
358            for d in self.dialogs.values():
359                if not isinstance(d, tree.SessionTreeView):
360                    d.Close()
361    
362      def NewSession(self):      def NewSession(self):
363          self.save_modified_session()          self.save_modified_session()
364            self.prepare_new_session()
365          self.application.SetSession(create_empty_session())          self.application.SetSession(create_empty_session())
366    
367      def OpenSession(self):      def OpenSession(self):
368          self.save_modified_session()          self.save_modified_session()
369          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, _("Open Session"), ".", "", "*.thuban", wxOPEN)
                            "*.thuban", wxOPEN)  
370          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
371                self.prepare_new_session()
372              self.application.OpenSession(dlg.GetPath())              self.application.OpenSession(dlg.GetPath())
373          dlg.Destroy()          dlg.Destroy()
374    
375      def SaveSession(self):      def SaveSession(self):
376          if self.application.session.filename == None:          if self.application.session.filename == None:
377              self.SaveSessionAs()              self.SaveSessionAs()
378          self.application.SaveSession()          else:
379                self.application.SaveSession()
380    
381      def SaveSessionAs(self):      def SaveSessionAs(self):
382          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, _("Save Session As"), ".", "",
383                             "*.thuban", wxOPEN)                             "*.thuban", wxOPEN)
384          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
385              self.application.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
# Line 306  class MainWindow(wxFrame): Line 394  class MainWindow(wxFrame):
394          if result == wxID_CANCEL:          if result == wxID_CANCEL:
395              event.Veto()              event.Veto()
396          else:          else:
397                # FIXME: it would be better to tie the unsubscription to
398                # wx's destroy event, but that isn't implemented for wxGTK
399                # yet.
400                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
401              self.Destroy()              self.Destroy()
402    
403      def SetMap(self, map):      def SetMap(self, map):
404          self.canvas.SetMap(map)          self.canvas.SetMap(map)
405            #self.legendPanel.SetMap(map)
406    
407        def Map(self):
408            """Return the map displayed by this mainwindow"""
409    
410            # sanity check
411            #assert(self.canvas.Map() is self.legendPanel.GetMap())
412    
413            return self.canvas.Map()
414    
415      def ShowSessionTree(self):      def ShowSessionTree(self):
416          name = "session_tree"          name = "session_tree"
# Line 317  class MainWindow(wxFrame): Line 418  class MainWindow(wxFrame):
418          if dialog is None:          if dialog is None:
419              dialog = tree.SessionTreeView(self, self.application, name)              dialog = tree.SessionTreeView(self, self.application, name)
420              self.add_dialog(name, dialog)              self.add_dialog(name, dialog)
421              dialog.Show(true)              dialog.Show(True)
422          else:          else:
423              # FIXME: bring dialog to front here              # FIXME: bring dialog to front here
424              pass              pass
425    
426    
427      def About(self):      def About(self):
428          self.RunMessageBox("About",          self.RunMessageBox(_("About"),
429                             ("Thuban is a program for\n"                             _("Thuban v%s\n"
430                                #"Build Date: %s\n"
431                                "\n"
432                                "Thuban is a program for\n"
433                              "exploring geographic data.\n"                              "exploring geographic data.\n"
434                              "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001-2003 Intevation GmbH.\n"
435                              "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GNU GPL"
436                               % __ThubanVersion__), #__BuildDate__)),
437                             wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
438    
439      def AddLayer(self):      def AddLayer(self):
440          dlg = wxFileDialog(self, "Select a data file", ".", "", "*.*",          dlg = wxFileDialog(self, _("Select a data file"), ".", "", "*.*",
441                             wxOPEN)                             wxOPEN)
442          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
443              filename = dlg.GetPath()              filename = dlg.GetPath()
# Line 343  class MainWindow(wxFrame): Line 449  class MainWindow(wxFrame):
449                  map.AddLayer(layer)                  map.AddLayer(layer)
450              except IOError:              except IOError:
451                  # the layer couldn't be opened                  # the layer couldn't be opened
452                  self.RunMessageBox("Add Layer",                  self.RunMessageBox(_("Add Layer"),
453                                     "Can't open the file '%s'." % filename)                                     _("Can't open the file '%s'.") % filename)
454              else:              else:
455                  if not has_layers:                  if not has_layers:
456                      # if we're adding a layer to an empty map, for the                      # if we're adding a layer to an empty map, fit the
457                      # new map to the window                      # new map to the window
458                      self.canvas.FitMapToWindow()                      self.canvas.FitMapToWindow()
459          dlg.Destroy()          dlg.Destroy()
# Line 357  class MainWindow(wxFrame): Line 463  class MainWindow(wxFrame):
463          if layer is not None:          if layer is not None:
464              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
465    
466        def CanRemoveLayer(self):
467            """Return true if the currently selected layer can be deleted.
468    
469            If no layer is selected return false.
470    
471            The return value of this method determines whether the remove
472            layer command is sensitive in menu.
473            """
474            layer = self.current_layer()
475            if layer is not None:
476                return self.canvas.Map().CanRemoveLayer(layer)
477            return 0
478    
479      def RaiseLayer(self):      def RaiseLayer(self):
480          layer = self.current_layer()          layer = self.current_layer()
481          if layer is not None:          if layer is not None:
# Line 372  class MainWindow(wxFrame): Line 491  class MainWindow(wxFrame):
491    
492          If no layer is selected, return None          If no layer is selected, return None
493          """          """
494          return self.interactor.SelectedLayer()          return self.canvas.SelectedLayer()
495    
496      def has_selected_layer(self):      def has_selected_layer(self):
497          """Return true if a layer is currently selected"""          """Return true if a layer is currently selected"""
498          return self.interactor.HasSelectedLayer()          return self.canvas.HasSelectedLayer()
499    
500      def choose_color(self):      def choose_color(self):
501          """Run the color selection dialog and return the selected color.          """Run the color selection dialog and return the selected color.
# Line 399  class MainWindow(wxFrame): Line 518  class MainWindow(wxFrame):
518          if layer is not None:          if layer is not None:
519              color = self.choose_color()              color = self.choose_color()
520              if color is not None:              if color is not None:
521                  layer.SetFill(color)                  layer.GetClassification().SetDefaultFill(color)
522    
523      def LayerTransparentFill(self):      def LayerTransparentFill(self):
524          layer = self.current_layer()          layer = self.current_layer()
525          if layer is not None:          if layer is not None:
526              layer.SetFill(None)              layer.GetClassification().SetDefaultFill(Color.None)
527    
528      def LayerOutlineColor(self):      def LayerOutlineColor(self):
529          layer = self.current_layer()          layer = self.current_layer()
530          if layer is not None:          if layer is not None:
531              color = self.choose_color()              color = self.choose_color()
532              if color is not None:              if color is not None:
533                  layer.SetStroke(color)                  layer.GetClassification().SetDefaultLineColor(color)
534    
535      def LayerNoOutline(self):      def LayerNoOutline(self):
536          layer = self.current_layer()          layer = self.current_layer()
537          if layer is not None:          if layer is not None:
538              layer.SetStroke(None)              layer.GetClassification().SetDefaultLineColor(Color.None)
539    
540      def HideLayer(self):      def HideLayer(self):
541          layer = self.current_layer()          layer = self.current_layer()
# Line 435  class MainWindow(wxFrame): Line 554  class MainWindow(wxFrame):
554              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
555              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
556              if dialog is None:              if dialog is None:
557                  dialog = tableview.TableFrame(self, self.interactor, name,                  dialog = tableview.LayerTableFrame(self, name,
558                                                "Table: %s" % layer.Title(),                                                 _("Table: %s") % layer.Title(),
559                                                layer, table)                                                     layer, table)
560                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
561                  dialog.Show(true)                  dialog.Show(true)
562              else:              else:
# Line 461  class MainWindow(wxFrame): Line 580  class MainWindow(wxFrame):
580              map.SetProjection(proj)              map.SetProjection(proj)
581          proj4Dlg.Destroy()          proj4Dlg.Destroy()
582    
583        def Classify(self):
584    
585            #
586            # the menu option for this should only be available if there
587            # is a current layer, so we don't need to check if the
588            # current layer is None
589            #
590    
591            layer = self.current_layer()
592            self.OpenClassifier(layer)
593    
594        def OpenClassifier(self, layer, group = None):
595            name = "classifier" + str(id(layer))
596            dialog = self.get_open_dialog(name)
597    
598            if dialog is None:
599                dialog = classifier.Classifier(self, name, layer, group)
600                self.add_dialog(name, dialog)
601                dialog.Show()
602            dialog.Raise()
603    
604    
605        def ShowLegend(self, switch = False):
606            name = "legend"
607            dialog = self.FindRegisteredDock(name)
608    
609            if dialog is None:
610                title = "Legend: %s" % self.Map().Title()
611                dialog = self.CreateDock(name, -1, title, wxLAYOUT_LEFT)
612                legend.LegendPanel(dialog, None, self)
613    
614            dialog.GetPanel().SetMap(self.Map())
615            dialog.Show()
616    
617      def ZoomInTool(self):      def ZoomInTool(self):
618          self.canvas.ZoomInTool()          self.canvas.ZoomInTool()
619    
# Line 483  class MainWindow(wxFrame): Line 636  class MainWindow(wxFrame):
636      def PrintMap(self):      def PrintMap(self):
637          self.canvas.Print()          self.canvas.Print()
638    
639      def identify_view_on_demand(self, layer, shape):      def identify_view_on_demand(self, layer, shapes):
640          name = "identify_view"          name = "identify_view"
641          if self.canvas.CurrentTool() == "IdentifyTool":          if self.canvas.CurrentTool() == "IdentifyTool":
642              if not self.dialog_open(name):              if not self.dialog_open(name):
643                  dialog = identifyview.IdentifyView(self, self.interactor, name)                  dialog = identifyview.IdentifyView(self, name)
644                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
645                  dialog.Show(true)                  dialog.Show(True)
646              else:              else:
647                  # FIXME: bring dialog to front?                  # FIXME: bring dialog to front?
648                  pass                  pass
# Line 511  def _method_command(name, title, method, Line 664  def _method_command(name, title, method,
664                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
665                           sensitive = sensitive))                           sensitive = sensitive))
666    
667  def _tool_command(name, title, method, toolname, helptext = "",  def make_check_current_tool(toolname):
668                    icon = ""):      """Return a function that tests if the currently active tool is toolname
669      """Add a tool command"""  
670        The returned function can be called with the context and returns
671        true iff the currently active tool's name is toolname. It's directly
672        usable as the 'checked' callback of a command.
673        """
674      def check_current_tool(context, name=toolname):      def check_current_tool(context, name=toolname):
675          return context.mainwindow.canvas.CurrentTool() == name          return context.mainwindow.canvas.CurrentTool() == name
676      registry.Add(Command(name, title, call_method, args=(method,),      return check_current_tool
677                           helptext = helptext, icon = icon,  
678                           checked = check_current_tool))  def _tool_command(name, title, method, toolname, helptext = "",
679                      icon = "", sensitive = None):
680        """Add a tool command"""
681        registry.Add(ToolCommand(name, title, call_method, args=(method,),
682                                 helptext = helptext, icon = icon,
683                                 checked = make_check_current_tool(toolname),
684                                 sensitive = sensitive))
685    
686  def _has_selected_layer(context):  def _has_selected_layer(context):
687      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
688      return context.mainwindow.has_selected_layer()      return context.mainwindow.has_selected_layer()
689    
690    def _can_remove_layer(context):
691        return context.mainwindow.CanRemoveLayer()
692    
693    def _has_tree_window_shown(context):
694        """Return true if the tree window is shown"""
695        return context.mainwindow.get_open_dialog("session_tree") is None
696    
697    def _has_visible_map(context):
698        """Return true iff theres a visible map in the mainwindow.
699    
700        A visible map is a map with at least one visible layer."""
701        map = context.mainwindow.Map()
702        if map is not None:
703            for layer in map.Layers():
704                if layer.Visible():
705                    return 1
706        return 0
707    
708    def _has_legend_shown(context):
709        """Return true if the legend window is shown"""
710        return context.mainwindow.FindRegisteredDock("legend") is None
711    
712    
713  # File menu  # File menu
714  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", _("&New Session"), "NewSession")
715  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", _("&Open Session"), "OpenSession")
716  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", _("&Save Session"), "SaveSession")
717  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", _("Save Session &As"), "SaveSessionAs")
718  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree")  _method_command("show_session_tree", _("Show Session &Tree"), "ShowSessionTree",
719  _method_command("exit", "&Exit", "Exit")                  sensitive = _has_tree_window_shown)
720    _method_command("exit", _("E&xit"), "Exit")
721    
722  # Help menu  # Help menu
723  _method_command("help_about", "&About", "About")  _method_command("help_about", _("&About"), "About")
724    
725    
726  # Map menu  # Map menu
727  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", _("Pro&jection"), "Projection")
728    
729  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", _("&Zoom in"), "ZoomInTool", "ZoomInTool",
730                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = _("Switch to map-mode 'zoom-in'"), icon = "zoom_in",
731  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",                sensitive = _has_visible_map)
732                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")  _tool_command("map_zoom_out_tool", _("Zoom &out"), "ZoomOutTool", "ZoomOutTool",
733  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",                helptext = _("Switch to map-mode 'zoom-out'"), icon = "zoom_out",
734                helptext = "Switch to map-mode 'pan'", icon = "pan")                sensitive = _has_visible_map)
735  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_pan_tool", _("&Pan"), "PanTool", "PanTool",
736                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = _("Switch to map-mode 'pan'"), icon = "pan",
737  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",                sensitive = _has_visible_map)
738                helptext = "Add/Remove labels", icon = "label")  _tool_command("map_identify_tool", _("&Identify"), "IdentifyTool",
739  _method_command("map_full_extent", "&Full extent", "FullExtent",                "IdentifyTool",
740                 helptext = "Full Extent", icon = "fullextent")                helptext = _("Switch to map-mode 'identify'"), icon = "identify",
741  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")                sensitive = _has_visible_map)
742    _tool_command("map_label_tool", _("&Label"), "LabelTool", "LabelTool",
743                  helptext = _("Add/Remove labels"), icon = "label",
744                  sensitive = _has_visible_map)
745    _method_command("map_full_extent", _("&Full extent"), "FullExtent",
746                   helptext = _("Full Extent"), icon = "fullextent",
747                  sensitive = _has_visible_map)
748    _method_command("map_print", _("Prin&t"), "PrintMap",
749                    helptext = _("Print the map"))
750    
751  # Layer menu  # Layer menu
752  _method_command("layer_add", "&Add Layer", "AddLayer",  _method_command("layer_add", _("&Add Layer"), "AddLayer",
753                  helptext = "Add a new layer to active map")                  helptext = _("Add a new layer to active map"))
754  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",  _method_command("layer_remove", _("&Remove Layer"), "RemoveLayer",
755                  helptext = "Remove selected layer(s)",                  helptext = _("Remove selected layer(s)"),
756                    sensitive = _can_remove_layer)
757    _method_command("layer_fill_color", _("&Fill Color"), "LayerFillColor",
758                    helptext = _("Set the fill color of selected layer(s)"),
759                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
760  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_transparent_fill", _("&Transparent Fill"),
                 helptext = "Set the fill color of selected layer(s)",  
                 sensitive = _has_selected_layer)  
 _method_command("layer_transparent_fill", "&Transparent Fill",  
761                  "LayerTransparentFill",                  "LayerTransparentFill",
762                  helptext = "Do not fill the selected layer(s)",                  helptext = _("Do not fill the selected layer(s)"),
763                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
764  _method_command("layer_outline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_outline_color", _("&Outline Color"), "LayerOutlineColor",
765                  helptext = "Set the outline color of selected layer(s)",                  helptext = _("Set the outline color of selected layer(s)"),
766                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
767  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_no_outline", _("&No Outline"), "LayerNoOutline",
768                  helptext = "Do not draw the outline of the selected layer(s)",                  helptext= _("Do not draw the outline of the selected layer(s)"),
769                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
770  _method_command("layer_raise", "&Raise", "RaiseLayer",  _method_command("layer_raise", _("&Raise"), "RaiseLayer",
771                  helptext = "Raise selected layer(s)",                  helptext = _("Raise selected layer(s)"),
772                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
773  _method_command("layer_lower", "&Lower", "LowerLayer",  _method_command("layer_lower", _("&Lower"), "LowerLayer",
774                  helptext = "Lower selected layer(s)",                  helptext = _("Lower selected layer(s)"),
775                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
776  _method_command("layer_show", "&Show", "ShowLayer",  _method_command("layer_show", _("&Show"), "ShowLayer",
777                  helptext = "Make selected layer(s) visible",                  helptext = _("Make selected layer(s) visible"),
778                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
779  _method_command("layer_hide", "&Hide", "HideLayer",  _method_command("layer_hide", _("&Hide"), "HideLayer",
780                  helptext = "Make selected layer(s) unvisible",                  helptext = _("Make selected layer(s) unvisible"),
781                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
782  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  _method_command("layer_show_table", _("Show Ta&ble"), "LayerShowTable",
783                  helptext = "Show the selected layer's table",                  helptext = _("Show the selected layer's table"),
784                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
785    _method_command("layer_classifier", _("Classify"), "Classify",
786                    sensitive = _has_selected_layer)
787    _method_command("show_legend", _("Show Legend"), "ShowLegend",
788                    sensitive = _has_legend_shown)
789    
790  # the menu structure  # the menu structure
791  main_menu = Menu("<main>", "<main>",  main_menu = Menu("<main>", "<main>",
792                   [Menu("file", "&File",                   [Menu("file", _("&File"),
793                         ["new_session", "open_session", None,                         ["new_session", "open_session", None,
794                          "save_session", "save_session_as", None,                          "save_session", "save_session_as", None,
795                          "show_session_tree", None,                          "show_session_tree", None,
796                            "show_legend", None,
797                          "exit"]),                          "exit"]),
798                    Menu("map", "&Map",                    Menu("map", _("&Map"),
799                         ["layer_add", "layer_remove",                         ["layer_add", "layer_remove",
800                          None,                          None,
801                          "map_projection",                          "map_projection",
# Line 607  main_menu = Menu("<main>", "<main>", Line 806  main_menu = Menu("<main>", "<main>",
806                          "map_full_extent",                          "map_full_extent",
807                          None,                          None,
808                          "map_print"]),                          "map_print"]),
809                    Menu("layer", "&Layer",                    Menu("layer", _("&Layer"),
810                         ["layer_fill_color", "layer_transparent_fill",                         ["layer_fill_color", "layer_transparent_fill",
811                          "layer_outline_color", "layer_no_outline",                          "layer_outline_color", "layer_no_outline",
812                          None,                          None,
# Line 615  main_menu = Menu("<main>", "<main>", Line 814  main_menu = Menu("<main>", "<main>",
814                          None,                          None,
815                          "layer_show", "layer_hide",                          "layer_show", "layer_hide",
816                          None,                          None,
817                          "layer_show_table"]),                          "layer_show_table",
818                    Menu("help", "&Help",                          None,
819                            "layer_classifier"]),
820                      Menu("help", _("&Help"),
821                         ["help_about"])])                         ["help_about"])])
822    
823  # the main toolbar  # the main toolbar
824    
825  main_toolbar = Menu("<toolbar>", "<toolbar>",  main_toolbar = Menu("<toolbar>", "<toolbar>",
826                      ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",                      ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
827                       "map_identify_tool", "map_label_tool", "map_full_extent"])                       "map_full_extent", None,
828                         "map_identify_tool", "map_label_tool"])
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