/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 13 by bh, Fri Aug 31 15:33:42 2001 UTC revision 314 by bh, Wed Sep 11 15:18:09 2002 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  from Thuban.Model.session import create_empty_session
 from Thuban.Model.map import Map  
21  from Thuban.Model.layer import Layer  from Thuban.Model.layer import Layer
22  from Thuban.Model.color import Color  from Thuban.Model.color import Color
23  from Thuban.Model.proj import Projection  from Thuban.Model.proj import Projection
# Line 27  import view Line 26  import view
26  import tree  import tree
27  import proj4dialog  import proj4dialog
28  import tableview, identifyview  import tableview, identifyview
29    from menu import Menu
30    
31  import main  from context import Context
32  from command import registry, Command  from command import registry, Command
33    from messages import SELECTED_SHAPE, VIEW_POSITION
34    
35    
36  # the directory where the toolbar icons are stored  # the directory where the toolbar icons are stored
# Line 39  bitmapext = ".xpm" Line 40  bitmapext = ".xpm"
40    
41  class MainWindow(wxFrame):  class MainWindow(wxFrame):
42    
43      def __init__(self, parent, ID):      def __init__(self, parent, ID, title, application, interactor,
44          wxFrame.__init__(self, parent, ID, 'Thuban',                   initial_message = None, size = wxSize(-1, -1)):
45                           wxDefaultPosition, wxSize(400, 300))          wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
46    
47            self.application = application
48            self.interactor = interactor
49    
50          self.CreateStatusBar()          self.CreateStatusBar()
51          self.SetStatusText("This is the wxPython-based "          if initial_message:
52                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
53    
54          self.identify_view = None          self.identify_view = None
55    
56          self.init_ids()          self.init_ids()
57    
58          menuBar = wxMenuBar()          # creat the menubar from the main_menu description
59            self.SetMenuBar(self.build_menu_bar(main_menu))
         menu = wxMenu()  
         menuBar.Append(menu, "&File");  
         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 ["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")  
60    
61          self.SetMenuBar(menuBar)          # Similarly, create the toolbar from main_toolbar
62            toolbar = self.build_toolbar(main_toolbar)
         # 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)  
63          # call Realize to make sure that the tools appear.          # call Realize to make sure that the tools appear.
64          toolbar.Realize()          toolbar.Realize()
65    
66          # Create the map canvas          # Create the map canvas
67          canvas = view.MapCanvas(self, -1)          canvas = view.MapCanvas(self, -1, interactor)
68            canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
69          self.canvas = canvas          self.canvas = canvas
70    
71            self.init_dialogs()
72    
73            interactor.Subscribe(SELECTED_SHAPE, self.identify_view_on_demand)
74    
75          EVT_CLOSE(self, self.OnClose)          EVT_CLOSE(self, self.OnClose)
76    
77      def init_ids(self):      def init_ids(self):
# Line 111  class MainWindow(wxFrame): Line 79  class MainWindow(wxFrame):
79          self.current_id = 6000          self.current_id = 6000
80          self.id_to_name = {}          self.id_to_name = {}
81          self.name_to_id = {}          self.name_to_id = {}
82            self.events_bound = {}
83    
84      def get_id(self, name):      def get_id(self, name):
85          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 123  class MainWindow(wxFrame): Line 92  class MainWindow(wxFrame):
92              self.name_to_id[name] = ID              self.name_to_id[name] = ID
93              self.id_to_name[ID] = name              self.id_to_name[ID] = name
94          return ID          return ID
95            
96        def bind_command_events(self, command, ID):
97            """Bind the necessary events for the given command and ID"""
98            if not self.events_bound.has_key(ID):
99                # the events haven't been bound yet
100                EVT_MENU(self, ID, self.invoke_command)
101                if command.IsDynamic():
102                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
103    
104        def build_menu_bar(self, menudesc):
105            """Build and return the menu bar from the menu description"""
106            menu_bar = wxMenuBar()
107    
108            for item in menudesc.items:
109                # here the items must all be Menu instances themselves
110                menu_bar.Append(self.build_menu(item), item.title)
111    
112            return menu_bar
113    
114        def build_menu(self, menudesc):
115            """Return a wxMenu built from the menu description menudesc"""
116            wxmenu = wxMenu()
117            last = None
118            for item in menudesc.items:
119                if item is None:
120                    # a separator. Only add one if the last item was not a
121                    # separator
122                    if last is not None:
123                        wxmenu.AppendSeparator()
124                elif isinstance(item, Menu):
125                    # a submenu
126                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
127                else:
128                    # must the name the name of a command
129                    self.add_menu_command(wxmenu, item)
130                last = item
131            return wxmenu
132    
133        def build_toolbar(self, toolbardesc):
134            """Build and return the main toolbar window from a toolbar description
135    
136            The parameter should be an instance of the Menu class but it
137            should not contain submenus.
138            """
139            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
140    
141            # set the size of the tools' bitmaps. Not needed on wxGTK, but
142            # on Windows, although it doesn't work very well there. It seems
143            # that only 16x16 icons are really supported on windows.
144            # We probably shouldn't hardwire the bitmap size here.
145            toolbar.SetToolBitmapSize(wxSize(24, 24))
146    
147            for item in toolbardesc.items:
148                if item is None:
149                    toolbar.AddSeparator()
150                else:
151                    # assume it's a string.
152                    self.add_toolbar_command(toolbar, item)
153    
154            return toolbar
155    
156      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
157          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
158    
# Line 137  class MainWindow(wxFrame): Line 166  class MainWindow(wxFrame):
166                  ID = self.get_id(name)                  ID = self.get_id(name)
167                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
168                              command.IsCheckCommand())                              command.IsCheckCommand())
169                  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)  
170              else:              else:
171                  print "Unknown command %s" % name                  print "Unknown command %s" % name
172    
# Line 161  class MainWindow(wxFrame): Line 188  class MainWindow(wxFrame):
188                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
189                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
190                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
191                    self.bind_command_events(command, ID)
192              else:              else:
193                  print "Unknown command %s" % name                  print "Unknown command %s" % name
194    
195        def Context(self):
196            """Return the context object for a command invoked from this window
197            """
198            return Context(self.application, self.application.Session(), self)
199    
200      def invoke_command(self, event):      def invoke_command(self, event):
201          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
202          if name is not None:          if name is not None:
203              command = registry.Command(name)              command = registry.Command(name)
204              command.Execute(self)              command.Execute(self.Context())
205          else:          else:
206              print "Unknown command ID %d" % event.GetId()              print "Unknown command ID %d" % event.GetId()
207    
208      def update_command_ui(self, event):      def update_command_ui(self, event):
209          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
210            context = self.Context()
211          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
212          if command is not None:          if command is not None:
213              event.Enable(command.Sensitive(self))              event.Enable(command.Sensitive(context))
214              event.SetText(command.DynText(self))              event.SetText(command.DynText(context))
215              if command.IsCheckCommand():              if command.IsCheckCommand():
216                  event.Check(command.Checked(self))                  event.Check(command.Checked(context))
217    
218        def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
219            """Run a modal message box with the given text, title and flags
220            and return the result"""
221            dlg = wxMessageDialog(self, text, title, flags)
222            result = dlg.ShowModal()
223            dlg.Destroy()
224            return result
225    
226        def init_dialogs(self):
227            """Initialize the dialog handling"""
228            # The mainwindow maintains a dict mapping names to open
229            # non-modal dialogs. The dialogs are put into this dict when
230            # they're created and removed when they're closed
231            self.dialogs = {}
232    
233        def add_dialog(self, name, dialog):
234            if self.dialogs.has_key(name):
235                raise RuntimeError("The Dialog named %s is already open" % name)
236            self.dialogs[name] = dialog
237    
238        def dialog_open(self, name):
239            return self.dialogs.has_key(name)
240    
241        def remove_dialog(self, name):
242            del self.dialogs[name]
243    
244        def get_open_dialog(self, name):
245            return self.dialogs.get(name)
246    
247        def view_position_changed(self):
248            pos = self.canvas.CurrentPosition()
249            if pos is not None:
250                text = "(%10.10g, %10.10g)" % pos
251            else:
252                text = ""
253            self.SetStatusText(text)
254    
255        def save_modified_session(self, can_veto = 1):
256            """If the current session has been modified, ask the user
257            whether to save it and do so if requested. Return the outcome of
258            the dialog (either wxID_OK, wxID_CANCEL or wxID_NO). If the
259            dialog wasn't run return wxID_NO.
260    
261            If the can_veto parameter is true (default) the dialog includes
262            a cancel button, otherwise not.
263            """
264            if self.application.session.WasModified():
265                flags = wxYES_NO | wxICON_QUESTION
266                if can_veto:
267                    flags = flags | wxCANCEL
268                result = self.RunMessageBox("Exit",
269                                            ("The session has been modified."
270                                             " Do you want to save it?"),
271                                            flags)
272                if result == wxID_YES:
273                    self.SaveSession()
274            else:
275                result = wxID_NO
276            return result
277    
278      def NewSession(self):      def NewSession(self):
279          session = Session("")          self.save_modified_session()
280          session.AddMap(Map(""))          self.application.SetSession(create_empty_session())
         main.app.SetSession(session)  
281    
282      def OpenSession(self):      def OpenSession(self):
283            self.save_modified_session()
284          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, "Select a session file", ".", "",
285                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
286          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
287              main.app.OpenSession(dlg.GetPath())              self.application.OpenSession(dlg.GetPath())
288          dlg.Destroy()          dlg.Destroy()
289    
290      def SaveSession(self):      def SaveSession(self):
291          main.app.SaveSession()          if self.application.session.filename == None:
292                self.SaveSessionAs()
293            self.application.SaveSession()
294    
295      def SaveSessionAs(self):      def SaveSessionAs(self):
296          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",
297                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
298          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
299              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
300              main.app.SaveSession()              self.application.SaveSession()
301          dlg.Destroy()          dlg.Destroy()
302    
303      def Exit(self):      def Exit(self):
304          self.Close(false)          self.Close(false)
305    
306      def OnClose(self, event):      def OnClose(self, event):
307          veto = 0          result = self.save_modified_session(can_veto = event.CanVeto())
308          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:  
309              event.Veto()              event.Veto()
310          else:          else:
311                # FIXME: it would be better to tie the unsubscription to
312                # wx's destroy event, but that isn't implemented for wxGTK
313                # yet.
314                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
315              self.Destroy()              self.Destroy()
316    
317      def SetMap(self, map):      def SetMap(self, map):
318          self.canvas.SetMap(map)          self.canvas.SetMap(map)
319    
320        def Map(self):
321            """Return the map displayed by this mainwindow"""
322            return self.canvas.Map()
323    
324        def ShowSessionTree(self):
325            name = "session_tree"
326            dialog = self.get_open_dialog(name)
327            if dialog is None:
328                dialog = tree.SessionTreeView(self, self.application, name)
329                self.add_dialog(name, dialog)
330                dialog.Show(true)
331            else:
332                # FIXME: bring dialog to front here
333                pass
334    
335      def About(self):      def About(self):
336          dlg = wxMessageDialog(self,          self.RunMessageBox("About",
337                                ("Thuban is a program for\n"                             ("Thuban is a program for\n"
338                                 "exploring geographic data.\n"                              "exploring geographic data.\n"
339                                 "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001 Intevation GmbH.\n"
340                                 "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GPL"),
341                                "About", wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
         dlg.ShowModal()  
         dlg.Destroy()  
342    
343      def AddLayer(self):      def AddLayer(self):
344          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, "Select a data file", ".", "", "*.*",
345                             wxOPEN)                             wxOPEN)
346          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
347              filename = dlg.GetPath()              filename = dlg.GetPath()
348              title = os.path.splitext(os.path.basename(filename))[0]              title = os.path.splitext(os.path.basename(filename))[0]
349              layer = Layer(title, filename)              layer = Layer(title, filename)
350              self.canvas.Map().AddLayer(layer)              map = self.canvas.Map()
351                has_layers = map.HasLayers()
352                try:
353                    map.AddLayer(layer)
354                except IOError:
355                    # the layer couldn't be opened
356                    self.RunMessageBox("Add Layer",
357                                       "Can't open the file '%s'." % filename)
358                else:
359                    if not has_layers:
360                        # if we're adding a layer to an empty map, for the
361                        # new map to the window
362                        self.canvas.FitMapToWindow()
363          dlg.Destroy()          dlg.Destroy()
364    
365      def RemoveLayer(self):      def RemoveLayer(self):
366          layer = self.current_layer()          layer = self.current_layer()
367          if layer is not None:          if layer is not None:
368              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
369          else:  
370              dlg = wxMessageDialog(self, "No layer is selected.\n",      def CanRemoveLayer(self):
371                                    "Remove layer", wxOK | wxICON_INFORMATION)          """Return true if the currently selected layer can be deleted.
372              dlg.ShowModal()  
373              dlg.Destroy()          If no layer is selected return false.
374    
375            The return value of this method determines whether the remove
376            layer command is sensitive in menu.
377            """
378            layer = self.current_layer()
379            if layer is not None:
380                return self.canvas.Map().CanRemoveLayer(layer)
381            return 0
382    
383      def RaiseLayer(self):      def RaiseLayer(self):
384          layer = self.current_layer()          layer = self.current_layer()
385          if layer is not None:          if layer is not None:
386              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
387            
388      def LowerLayer(self):      def LowerLayer(self):
389          layer = self.current_layer()          layer = self.current_layer()
390          if layer is not None:          if layer is not None:
# Line 277  class MainWindow(wxFrame): Line 395  class MainWindow(wxFrame):
395    
396          If no layer is selected, return None          If no layer is selected, return None
397          """          """
398          tree = main.app.tree.tree          return self.interactor.SelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         if isinstance(layer, Layer):  
             return layer  
         return None  
399    
400      def has_selected_layer(self):      def has_selected_layer(self):
401          """Return true if a layer is currently selected"""          """Return true if a layer is currently selected"""
402          tree = main.app.tree.tree          return self.interactor.HasSelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         return isinstance(layer, Layer)  
403    
404      def choose_color(self):      def choose_color(self):
405          """Run the color selection dialog and return the selected color.          """Run the color selection dialog and return the selected color.
# Line 342  class MainWindow(wxFrame): Line 454  class MainWindow(wxFrame):
454      def LayerShowTable(self):      def LayerShowTable(self):
455          layer = self.current_layer()          layer = self.current_layer()
456          if layer is not None:          if layer is not None:
457              tv = tableview.TableFrame(self, layer.table)              table = layer.table
458              tv.Show(true)              name = "table_view" + str(id(table))
459                dialog = self.get_open_dialog(name)
460                if dialog is None:
461                    dialog = tableview.LayerTableFrame(self, self.interactor, name,
462                                                       "Table: %s" % layer.Title(),
463                                                       layer, table)
464                    self.add_dialog(name, dialog)
465                    dialog.Show(true)
466                else:
467                    # FIXME: bring dialog to front here
468                    pass
469    
470      def Projection(self):      def Projection(self):
471          map = self.canvas.Map()          map = self.canvas.Map()
472          proj = map.projection          proj = map.projection
473          if proj is None:          if proj is None:
474              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None, map.BoundingBox())
475          else:          else:
476              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params,
477                                                   map.BoundingBox())
478          if proj4Dlg.ShowModal() == wxID_OK:          if proj4Dlg.ShowModal() == wxID_OK:
479              params = proj4Dlg.GetParams()              params = proj4Dlg.GetParams()
480              if params is not None:              if params is not None:
# Line 371  class MainWindow(wxFrame): Line 494  class MainWindow(wxFrame):
494          self.canvas.PanTool()          self.canvas.PanTool()
495    
496      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)  
497          self.canvas.IdentifyTool()          self.canvas.IdentifyTool()
498            self.identify_view_on_demand(None, None)
499    
500      def LabelTool(self):      def LabelTool(self):
501          self.canvas.LabelTool()          self.canvas.LabelTool()
# Line 385  class MainWindow(wxFrame): Line 506  class MainWindow(wxFrame):
506      def PrintMap(self):      def PrintMap(self):
507          self.canvas.Print()          self.canvas.Print()
508    
509        def identify_view_on_demand(self, layer, shape):
510            name = "identify_view"
511            if self.canvas.CurrentTool() == "IdentifyTool":
512                if not self.dialog_open(name):
513                    dialog = identifyview.IdentifyView(self, self.interactor, name)
514                    self.add_dialog(name, dialog)
515                    dialog.Show(true)
516                else:
517                    # FIXME: bring dialog to front?
518                    pass
519    
520  #  #
521  # Define all the commands available in the main window  # Define all the commands available in the main window
# Line 393  class MainWindow(wxFrame): Line 524  class MainWindow(wxFrame):
524    
525  # Helper functions to define common command implementations  # Helper functions to define common command implementations
526  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
527      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
528      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
529    
530  def _method_command(name, title, method, helptext = "", sensitive = None):  def _method_command(name, title, method, helptext = "",
531      """Add a command implemented by a method of the context object"""                      icon = "", sensitive = None):
532        """Add a command implemented by a method of the mainwindow object"""
533      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
534                           helptext = helptext, sensitive = sensitive))                           helptext = helptext, icon = icon,
535                             sensitive = sensitive))
536    
537    def make_check_current_tool(toolname):
538        """Return a function that tests if the currently active tool is toolname
539    
540        The returned function can be called with the context and returns
541        true iff the currently active tool's name is toolname. It's directly
542        usable as the 'checked' callback of a command.
543        """
544        def check_current_tool(context, name=toolname):
545            return context.mainwindow.canvas.CurrentTool() == name
546        return check_current_tool
547    
548  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
549                    icon = ""):                    icon = "", sensitive = None):
550      """Add a tool command"""      """Add a tool command"""
     def check_current_tool(context, name=toolname):  
         return context.canvas.CurrentTool() == name  
551      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
552                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
553                           checked = check_current_tool))                           checked = make_check_current_tool(toolname),
554                             sensitive = sensitive))
555    
556  def _has_selected_layer(context):  def _has_selected_layer(context):
557      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
558      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
559    
560    def _can_remove_layer(context):
561        return context.mainwindow.CanRemoveLayer()
562    
563    def _has_tree_window_shown(context):
564        """Return true if the tree window is shown"""
565        return context.mainwindow.get_open_dialog("session_tree") is None
566    
567    def _has_visible_map(context):
568        """Return true iff theres a visible map in the mainwindow.
569    
570        A visible map is a map with at least one visible layer."""
571        map = context.mainwindow.Map()
572        if map is not None:
573            for layer in map.Layers():
574                if layer.Visible():
575                    return 1
576        return 0
577    
578    
579  # File menu  # File menu
580  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", "&New Session", "NewSession")
581  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", "&Open Session", "OpenSession")
582  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", "&Save Session", "SaveSession")
583  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")
584  _method_command("exit", "&Exit", "Exit")  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree",
585                    sensitive = _has_tree_window_shown)
586    _method_command("exit", "E&xit", "Exit")
587    
588  # Help menu  # Help menu
589  _method_command("help_about", "&About", "About")  _method_command("help_about", "&About", "About")
# Line 428  _method_command("help_about", "&About", Line 593  _method_command("help_about", "&About",
593  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", "Pro&jection", "Projection")
594    
595  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",
596                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in",
597                  sensitive = _has_visible_map)
598  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",
599                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out",
600                  sensitive = _has_visible_map)
601  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",
602                helptext = "Switch to map-mode 'pan'", icon = "pan")                helptext = "Switch to map-mode 'pan'", icon = "pan",
603                  sensitive = _has_visible_map)
604  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",
605                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = "Switch to map-mode 'identify'", icon = "identify",
606                  sensitive = _has_visible_map)
607  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",
608                helptext = "Add/Remove labels", icon = "label")                helptext = "Add/Remove labels", icon = "label",
609  _method_command("map_full_extent", "&Full extent", "FullExtent")                sensitive = _has_visible_map)
610    _method_command("map_full_extent", "&Full extent", "FullExtent",
611                   helptext = "Full Extent", icon = "fullextent",
612                  sensitive = _has_visible_map)
613  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")
614    
615  # Layer menu  # Layer menu
616  _method_command("layer_add", "&Add", "AddLayer",  _method_command("layer_add", "&Add Layer", "AddLayer",
617                  helptext = "Add a new layer to active map")                  helptext = "Add a new layer to active map")
618  _method_command("layer_remove", "&Remove", "RemoveLayer",  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",
619                  helptext = "Remove selected layer(s)",                  helptext = "Remove selected layer(s)",
620                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
621  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",
622                  helptext = "Set the fill color of selected layer(s)",                  helptext = "Set the fill color of selected layer(s)",
623                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
# Line 453  _method_command("layer_transparent_fill" Line 625  _method_command("layer_transparent_fill"
625                  "LayerTransparentFill",                  "LayerTransparentFill",
626                  helptext = "Do not fill the selected layer(s)",                  helptext = "Do not fill the selected layer(s)",
627                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
628  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_outline_color", "&Outline Color", "LayerOutlineColor",
629                  helptext = "Set the outline color of selected layer(s)",                  helptext = "Set the outline color of selected layer(s)",
630                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
631  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",
# Line 474  _method_command("layer_hide", "&Hide", " Line 646  _method_command("layer_hide", "&Hide", "
646  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",
647                  helptext = "Show the selected layer's table",                  helptext = "Show the selected layer's table",
648                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
649    
650    
651    # the menu structure
652    main_menu = Menu("<main>", "<main>",
653                     [Menu("file", "&File",
654                           ["new_session", "open_session", None,
655                            "save_session", "save_session_as", None,
656                            "show_session_tree", None,
657                            "exit"]),
658                      Menu("map", "&Map",
659                           ["layer_add", "layer_remove",
660                            None,
661                            "map_projection",
662                            None,
663                            "map_zoom_in_tool", "map_zoom_out_tool",
664                            "map_pan_tool", "map_identify_tool", "map_label_tool",
665                            None,
666                            "map_full_extent",
667                            None,
668                            "map_print"]),
669                      Menu("layer", "&Layer",
670                           ["layer_fill_color", "layer_transparent_fill",
671                            "layer_outline_color", "layer_no_outline",
672                            None,
673                            "layer_raise", "layer_lower",
674                            None,
675                            "layer_show", "layer_hide",
676                            None,
677                            "layer_show_table"]),
678                      Menu("help", "&Help",
679                           ["help_about"])])
680    
681    # the main toolbar
682    
683    main_toolbar = Menu("<toolbar>", "<toolbar>",
684                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
685                         "map_identify_tool", "map_label_tool", "map_full_extent"])
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