/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 6 by bh, Tue Aug 28 15:41:52 2001 UTC revision 310 by bh, Tue Sep 10 16:45:22 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)
63          # toolbar          # call Realize to make sure that the tools appear.
64          toolbar = self.CreateToolBar(wxTB_3DBUTTONS)          toolbar.Realize()
         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)  
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 109  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 121  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            """Build and return a wxMenu from a menudescription"""
116            wxmenu = wxMenu()
117            last = None
118            for item in menudesc.items:
119                # here the items must all be Menu instances themselves
120                if item is None:
121                    # a separator. Only add one if the last item was not a
122                    # separator
123                    if last is not None:
124                        wxmenu.AppendSeparator()
125                elif isinstance(item, Menu):
126                    # a submenu
127                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
128                else:
129                    # must the name the name of a command
130                    self.add_menu_command(wxmenu, item)
131                last = item
132            return wxmenu
133    
134        def build_toolbar(self, toolbardesc):
135            """Build and return the main toolbar window from a toolbar description
136    
137            The parameter should be an instance of the Menu class but it
138            should not contain submenus.
139            """
140            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
141    
142            # set the size of the tools' bitmaps. Not needed on wxGTK, but
143            # on Windows, although it doesn't work very well there. It seems
144            # that only 16x16 icons are really supported on windows.
145            # We probably shouldn't hardwire the bitmap size here.
146            toolbar.SetToolBitmapSize(wxSize(24, 24))
147    
148            for item in toolbardesc.items:
149                if item is None:
150                    toolbar.AddSeparator()
151                else:
152                    # assume it's a string.
153                    self.add_toolbar_command(toolbar, item)
154    
155            return toolbar
156    
157      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
158          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
159    
# Line 135  class MainWindow(wxFrame): Line 167  class MainWindow(wxFrame):
167                  ID = self.get_id(name)                  ID = self.get_id(name)
168                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
169                              command.IsCheckCommand())                              command.IsCheckCommand())
170                  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)  
171              else:              else:
172                  print "Unknown command %s" % name                  print "Unknown command %s" % name
173    
# Line 159  class MainWindow(wxFrame): Line 189  class MainWindow(wxFrame):
189                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
190                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
191                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
192                    self.bind_command_events(command, ID)
193              else:              else:
194                  print "Unknown command %s" % name                  print "Unknown command %s" % name
195    
196        def Context(self):
197            """Return the context object for a command invoked from this window
198            """
199            return Context(self.application, self.application.Session(), self)
200    
201      def invoke_command(self, event):      def invoke_command(self, event):
202          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
203          if name is not None:          if name is not None:
204              command = registry.Command(name)              command = registry.Command(name)
205              command.Execute(self)              command.Execute(self.Context())
206          else:          else:
207              print "Unknown command ID %d" % event.GetId()              print "Unknown command ID %d" % event.GetId()
208    
209      def update_command_ui(self, event):      def update_command_ui(self, event):
210          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
211            context = self.Context()
212          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
213          if command is not None:          if command is not None:
214              event.Enable(command.Sensitive(self))              event.Enable(command.Sensitive(context))
215              event.Check(command.Checked(self))              event.SetText(command.DynText(context))
216              event.SetText(command.DynText(self))              if command.IsCheckCommand():
217                    event.Check(command.Checked(context))
218    
219        def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
220            """Run a modal message box with the given text, title and flags
221            and return the result"""
222            dlg = wxMessageDialog(self, text, title, flags)
223            result = dlg.ShowModal()
224            dlg.Destroy()
225            return result
226    
227        def init_dialogs(self):
228            """Initialize the dialog handling"""
229            # The mainwindow maintains a dict mapping names to open
230            # non-modal dialogs. The dialogs are put into this dict when
231            # they're created and removed when they're closed
232            self.dialogs = {}
233    
234        def add_dialog(self, name, dialog):
235            if self.dialogs.has_key(name):
236                raise RuntimeError("The Dialog named %s is already open" % name)
237            self.dialogs[name] = dialog
238    
239        def dialog_open(self, name):
240            return self.dialogs.has_key(name)
241    
242        def remove_dialog(self, name):
243            del self.dialogs[name]
244    
245        def get_open_dialog(self, name):
246            return self.dialogs.get(name)
247    
248        def view_position_changed(self):
249            pos = self.canvas.CurrentPosition()
250            if pos is not None:
251                text = "(%10.10g, %10.10g)" % pos
252            else:
253                text = ""
254            self.SetStatusText(text)
255    
256        def save_modified_session(self, can_veto = 1):
257            """If the current session has been modified, ask the user
258            whether to save it and do so if requested. Return the outcome of
259            the dialog (either wxID_OK, wxID_CANCEL or wxID_NO). If the
260            dialog wasn't run return wxID_NO.
261    
262            If the can_veto parameter is true (default) the dialog includes
263            a cancel button, otherwise not.
264            """
265            if self.application.session.WasModified():
266                flags = wxYES_NO | wxICON_QUESTION
267                if can_veto:
268                    flags = flags | wxCANCEL
269                result = self.RunMessageBox("Exit",
270                                            ("The session has been modified."
271                                             " Do you want to save it?"),
272                                            flags)
273                if result == wxID_YES:
274                    self.SaveSession()
275            else:
276                result = wxID_NO
277            return result
278    
279      def NewSession(self):      def NewSession(self):
280          session = Session("")          self.save_modified_session()
281          session.AddMap(Map(""))          self.application.SetSession(create_empty_session())
         main.app.SetSession(session)  
282    
283      def OpenSession(self):      def OpenSession(self):
284            self.save_modified_session()
285          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, "Select a session file", ".", "",
286                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
287          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
288              main.app.OpenSession(dlg.GetPath())              self.application.OpenSession(dlg.GetPath())
289          dlg.Destroy()          dlg.Destroy()
290    
291      def SaveSession(self):      def SaveSession(self):
292          main.app.SaveSession()          if self.application.session.filename == None:
293                self.SaveSessionAs()
294            self.application.SaveSession()
295    
296      def SaveSessionAs(self):      def SaveSessionAs(self):
297          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",
298                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
299          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
300              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
301              main.app.SaveSession()              self.application.SaveSession()
302          dlg.Destroy()          dlg.Destroy()
303    
304      def Exit(self):      def Exit(self):
305          self.Close(false)          self.Close(false)
306    
307      def OnClose(self, event):      def OnClose(self, event):
308          veto = 0          result = self.save_modified_session(can_veto = event.CanVeto())
309          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:  
310              event.Veto()              event.Veto()
311          else:          else:
312                # FIXME: it would be better to tie the unsubscription to
313                # wx's destroy event, but that isn't implemented for wxGTK
314                # yet.
315                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
316              self.Destroy()              self.Destroy()
317    
318      def SetMap(self, map):      def SetMap(self, map):
319          self.canvas.SetMap(map)          self.canvas.SetMap(map)
320    
321        def Map(self):
322            """Return the map displayed by this mainwindow"""
323            return self.canvas.Map()
324    
325        def ShowSessionTree(self):
326            name = "session_tree"
327            dialog = self.get_open_dialog(name)
328            if dialog is None:
329                dialog = tree.SessionTreeView(self, self.application, name)
330                self.add_dialog(name, dialog)
331                dialog.Show(true)
332            else:
333                # FIXME: bring dialog to front here
334                pass
335    
336      def About(self):      def About(self):
337          dlg = wxMessageDialog(self,          self.RunMessageBox("About",
338                                ("Thuban is a program for\n"                             ("Thuban is a program for\n"
339                                 "exploring geographic data.\n"                              "exploring geographic data.\n"
340                                 "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001 Intevation GmbH.\n"
341                                 "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GPL"),
342                                "About", wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
         dlg.ShowModal()  
         dlg.Destroy()  
343    
344      def AddLayer(self):      def AddLayer(self):
345          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, "Select a data file", ".", "", "*.*",
346                             wxOPEN)                             wxOPEN)
347          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
348              filename = dlg.GetPath()              filename = dlg.GetPath()
349              title = os.path.splitext(os.path.basename(filename))[0]              title = os.path.splitext(os.path.basename(filename))[0]
350              layer = Layer(title, filename)              layer = Layer(title, filename)
351              self.canvas.Map().AddLayer(layer)              map = self.canvas.Map()
352                has_layers = map.HasLayers()
353                try:
354                    map.AddLayer(layer)
355                except IOError:
356                    # the layer couldn't be opened
357                    self.RunMessageBox("Add Layer",
358                                       "Can't open the file '%s'." % filename)
359                else:
360                    if not has_layers:
361                        # if we're adding a layer to an empty map, for the
362                        # new map to the window
363                        self.canvas.FitMapToWindow()
364          dlg.Destroy()          dlg.Destroy()
365    
366      def RemoveLayer(self):      def RemoveLayer(self):
367          layer = self.current_layer()          layer = self.current_layer()
368          if layer is not None:          if layer is not None:
369              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
370          else:  
371              dlg = wxMessageDialog(self, "No layer is selected.\n",      def CanRemoveLayer(self):
372                                    "Remove layer", wxOK | wxICON_INFORMATION)          """Return true if the currently selected layer can be deleted.
373              dlg.ShowModal()  
374              dlg.Destroy()          If no layer is selected return false.
375    
376            The return value of this method determines whether the remove
377            layer command is sensitive in menu.
378            """
379            layer = self.current_layer()
380            if layer is not None:
381                return self.canvas.Map().CanRemoveLayer(layer)
382            return 0
383    
384      def RaiseLayer(self):      def RaiseLayer(self):
385          layer = self.current_layer()          layer = self.current_layer()
386          if layer is not None:          if layer is not None:
387              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
388            
389      def LowerLayer(self):      def LowerLayer(self):
390          layer = self.current_layer()          layer = self.current_layer()
391          if layer is not None:          if layer is not None:
# Line 274  class MainWindow(wxFrame): Line 396  class MainWindow(wxFrame):
396    
397          If no layer is selected, return None          If no layer is selected, return None
398          """          """
399          tree = main.app.tree.tree          return self.interactor.SelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         if isinstance(layer, Layer):  
             return layer  
         return None  
400    
401      def has_selected_layer(self):      def has_selected_layer(self):
402          """Return true if a layer is currently selected"""          """Return true if a layer is currently selected"""
403          tree = main.app.tree.tree          return self.interactor.HasSelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         return isinstance(layer, Layer)  
404    
405      def choose_color(self):      def choose_color(self):
406          """Run the color selection dialog and return the selected color.          """Run the color selection dialog and return the selected color.
# Line 339  class MainWindow(wxFrame): Line 455  class MainWindow(wxFrame):
455      def LayerShowTable(self):      def LayerShowTable(self):
456          layer = self.current_layer()          layer = self.current_layer()
457          if layer is not None:          if layer is not None:
458              tv = tableview.TableFrame(self, layer.table)              table = layer.table
459              tv.Show(true)              name = "table_view" + str(id(table))
460                dialog = self.get_open_dialog(name)
461                if dialog is None:
462                    dialog = tableview.LayerTableFrame(self, self.interactor, name,
463                                                       "Table: %s" % layer.Title(),
464                                                       layer, table)
465                    self.add_dialog(name, dialog)
466                    dialog.Show(true)
467                else:
468                    # FIXME: bring dialog to front here
469                    pass
470    
471      def Projection(self):      def Projection(self):
472          map = self.canvas.Map()          map = self.canvas.Map()
473          proj = map.projection          proj = map.projection
474          if proj is None:          if proj is None:
475              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None, map.BoundingBox())
476          else:          else:
477              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params,
478                                                   map.BoundingBox())
479          if proj4Dlg.ShowModal() == wxID_OK:          if proj4Dlg.ShowModal() == wxID_OK:
480              params = proj4Dlg.GetParams()              params = proj4Dlg.GetParams()
481              if params is not None:              if params is not None:
# Line 368  class MainWindow(wxFrame): Line 495  class MainWindow(wxFrame):
495          self.canvas.PanTool()          self.canvas.PanTool()
496    
497      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)  
498          self.canvas.IdentifyTool()          self.canvas.IdentifyTool()
499            self.identify_view_on_demand(None, None)
500    
501      def LabelTool(self):      def LabelTool(self):
502          self.canvas.LabelTool()          self.canvas.LabelTool()
# Line 382  class MainWindow(wxFrame): Line 507  class MainWindow(wxFrame):
507      def PrintMap(self):      def PrintMap(self):
508          self.canvas.Print()          self.canvas.Print()
509    
510        def identify_view_on_demand(self, layer, shape):
511            name = "identify_view"
512            if self.canvas.CurrentTool() == "IdentifyTool":
513                if not self.dialog_open(name):
514                    dialog = identifyview.IdentifyView(self, self.interactor, name)
515                    self.add_dialog(name, dialog)
516                    dialog.Show(true)
517                else:
518                    # FIXME: bring dialog to front?
519                    pass
520    
521  #  #
522  # Define all the commands available in the main window  # Define all the commands available in the main window
# Line 390  class MainWindow(wxFrame): Line 525  class MainWindow(wxFrame):
525    
526  # Helper functions to define common command implementations  # Helper functions to define common command implementations
527  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
528      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
529      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
530    
531  def _method_command(name, title, method, helptext = "", sensitive = None):  def _method_command(name, title, method, helptext = "",
532      """Add a command implemented by a method of the context object"""                      icon = "", sensitive = None):
533        """Add a command implemented by a method of the mainwindow object"""
534      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
535                           helptext = helptext, sensitive = sensitive))                           helptext = helptext, icon = icon,
536                             sensitive = sensitive))
537    
538    def make_check_current_tool(toolname):
539        """Return a function that tests if the currently active tool is toolname
540    
541        The returned function can be called with the context and returns
542        true iff the currently active tool's name is toolname. It's directly
543        usable as the 'checked' callback of a command.
544        """
545        def check_current_tool(context, name=toolname):
546            return context.mainwindow.canvas.CurrentTool() == name
547        return check_current_tool
548    
549  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
550                    icon = ""):                    icon = "", sensitive = None):
551      """Add a tool command"""      """Add a tool command"""
     def check_current_tool(context, name=toolname):  
         return context.canvas.CurrentTool() == name  
552      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
553                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
554                           checked = check_current_tool))                           checked = make_check_current_tool(toolname),
555                             sensitive = sensitive))
556    
557  def _has_selected_layer(context):  def _has_selected_layer(context):
558      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
559      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
560    
561    def _can_remove_layer(context):
562        return context.mainwindow.CanRemoveLayer()
563    
564    def _has_tree_window_shown(context):
565        """Return true if the tree window is shown"""
566        return context.mainwindow.get_open_dialog("session_tree") is None
567    
568    def _has_visible_map(context):
569        """Return true iff theres a visible map in the mainwindow.
570    
571        A visible map is a map with at least one visible layer."""
572        map = context.mainwindow.Map()
573        if map is not None:
574            for layer in map.Layers():
575                if layer.Visible():
576                    return 1
577        return 0
578    
579    
580  # File menu  # File menu
581  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", "&New Session", "NewSession")
582  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", "&Open Session", "OpenSession")
583  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", "&Save Session", "SaveSession")
584  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")
585    _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree",
586                    sensitive = _has_tree_window_shown)
587  _method_command("exit", "&Exit", "Exit")  _method_command("exit", "&Exit", "Exit")
588    
589  # Help menu  # Help menu
# Line 425  _method_command("help_about", "&About", Line 594  _method_command("help_about", "&About",
594  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", "Pro&jection", "Projection")
595    
596  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",
597                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in",
598                  sensitive = _has_visible_map)
599  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",
600                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out",
601                  sensitive = _has_visible_map)
602  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",
603                helptext = "Switch to map-mode 'pan'", icon = "pan")                helptext = "Switch to map-mode 'pan'", icon = "pan",
604                  sensitive = _has_visible_map)
605  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",
606                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = "Switch to map-mode 'identify'", icon = "identify",
607                  sensitive = _has_visible_map)
608  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",
609                helptext = "Add/Remove labels", icon = "label")                helptext = "Add/Remove labels", icon = "label",
610  _method_command("map_full_extent", "&Full extent", "FullExtent")                sensitive = _has_visible_map)
611    _method_command("map_full_extent", "&Full extent", "FullExtent",
612                   helptext = "Full Extent", icon = "fullextent",
613                  sensitive = _has_visible_map)
614  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")
615    
616  # Layer menu  # Layer menu
617  _method_command("layer_add", "&Add", "AddLayer",  _method_command("layer_add", "&Add Layer", "AddLayer",
618                  helptext = "Add a new layer to active map")                  helptext = "Add a new layer to active map")
619  _method_command("layer_remove", "&Remove", "RemoveLayer",  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",
620                  helptext = "Remove selected layer(s)",                  helptext = "Remove selected layer(s)",
621                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
622  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",
623                  helptext = "Set the fill color of selected layer(s)",                  helptext = "Set the fill color of selected layer(s)",
624                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
# Line 450  _method_command("layer_transparent_fill" Line 626  _method_command("layer_transparent_fill"
626                  "LayerTransparentFill",                  "LayerTransparentFill",
627                  helptext = "Do not fill the selected layer(s)",                  helptext = "Do not fill the selected layer(s)",
628                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
629  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_outline_color", "&Outline Color", "LayerOutlineColor",
630                  helptext = "Set the outline color of selected layer(s)",                  helptext = "Set the outline color of selected layer(s)",
631                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
632  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",
# Line 471  _method_command("layer_hide", "&Hide", " Line 647  _method_command("layer_hide", "&Hide", "
647  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",
648                  helptext = "Show the selected layer's table",                  helptext = "Show the selected layer's table",
649                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
650    
651    
652    # the menu structure
653    main_menu = Menu("<main>", "<main>",
654                     [Menu("file", "&File",
655                           ["new_session", "open_session", None,
656                            "save_session", "save_session_as", None,
657                            "show_session_tree", None,
658                            "exit"]),
659                      Menu("map", "&Map",
660                           ["layer_add", "layer_remove",
661                            None,
662                            "map_projection",
663                            None,
664                            "map_zoom_in_tool", "map_zoom_out_tool",
665                            "map_pan_tool", "map_identify_tool", "map_label_tool",
666                            None,
667                            "map_full_extent",
668                            None,
669                            "map_print"]),
670                      Menu("layer", "&Layer",
671                           ["layer_fill_color", "layer_transparent_fill",
672                            "layer_outline_color", "layer_no_outline",
673                            None,
674                            "layer_raise", "layer_lower",
675                            None,
676                            "layer_show", "layer_hide",
677                            None,
678                            "layer_show_table"]),
679                      Menu("help", "&Help",
680                           ["help_about"])])
681    
682    # the main toolbar
683    
684    main_toolbar = Menu("<toolbar>", "<toolbar>",
685                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
686                         "map_identify_tool", "map_label_tool", "map_full_extent"])
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