/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 84 by bh, Wed Apr 3 15:21:46 2002 UTC revision 450 by jonathan, Tue Mar 4 10:33:28 2003 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001 by Intevation GmbH  # Copyright (C) 2001, 2002 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
# Line 12  The main window Line 12  The main window
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    
15  import sys, os  import os
16    
17  from wxPython.wx import *  from wxPython.wx import *
18    
19  import Thuban  import Thuban
20  from Thuban.Model.session import Session, create_empty_session  from Thuban import _
21  from Thuban.Model.map import Map  from Thuban.Model.session import create_empty_session
22  from Thuban.Model.layer import Layer  from Thuban.Model.layer import Layer
23  from Thuban.Model.color import Color  from Thuban.Model.color import Color
24  from Thuban.Model.proj import Projection  from Thuban.Model.proj import Projection
# Line 27  import view Line 27  import view
27  import tree  import tree
28  import proj4dialog  import proj4dialog
29  import tableview, identifyview  import tableview, identifyview
30    import classifier
31    from menu import Menu
32    
33  import main  from context import Context
34  from command import registry, Command  from command import registry, Command, ToolCommand
35  from messages import SELECTED_SHAPE  from messages import SELECTED_SHAPE, VIEW_POSITION
36    
37    
38  # the directory where the toolbar icons are stored  # the directory where the toolbar icons are stored
# Line 40  bitmapext = ".xpm" Line 42  bitmapext = ".xpm"
42    
43  class MainWindow(wxFrame):  class MainWindow(wxFrame):
44    
45      def __init__(self, parent, ID, interactor):      def __init__(self, parent, ID, title, application, interactor,
46          wxFrame.__init__(self, parent, ID, 'Thuban',                   initial_message = None, size = wxSize(-1, -1)):
47                           wxDefaultPosition, wxSize(400, 300))          wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
48    
49            self.application = application
50          self.interactor = interactor          self.interactor = interactor
51    
52          self.CreateStatusBar()          self.CreateStatusBar()
53          self.SetStatusText("This is the wxPython-based "          if initial_message:
54                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
55    
56          self.identify_view = None          self.identify_view = None
57    
58          self.init_ids()          self.init_ids()
59    
60          menuBar = wxMenuBar()          # creat the menubar from the main_menu description
61            self.SetMenuBar(self.build_menu_bar(main_menu))
62    
63          menu = wxMenu()          # Similarly, create the toolbar from main_toolbar
64          menuBar.Append(menu, "&File");          toolbar = self.build_toolbar(main_toolbar)
         for name in ["new_session", "open_session", None,  
                      "save_session", "save_session_as", None,  
                      "exit"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Map");  
         for name in ["layer_add", "layer_remove",  
                      None,  
                      "map_projection",  
                      None,  
                      "map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool",  
                      None,  
                      "map_full_extent",  
                      None,  
                      "map_print"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Layer");  
         for name in ["layer_fill_color", "layer_transparent_fill",  
                      "layer_ourline_color", "layer_no_outline",  
                      None,  
                      "layer_raise", "layer_lower",  
                      None,  
                      "layer_show", "layer_hide",  
                      None,  
                      "layer_show_table"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Help");  
         self.add_menu_command(menu, "help_about")  
   
         self.SetMenuBar(menuBar)  
   
         # toolbar  
         toolbar = self.CreateToolBar(wxTB_3DBUTTONS)  
   
         # set the size of the tools' bitmaps. Not needed on wxGTK, but  
         # on Windows. We probably shouldn't hardwire the bitmap size  
         # here  
         toolbar.SetToolBitmapSize(wxSize(24, 24))  
   
         for name in ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool"]:  
             self.add_toolbar_command(toolbar, name)  
65          # call Realize to make sure that the tools appear.          # call Realize to make sure that the tools appear.
66          toolbar.Realize()          toolbar.Realize()
67    
68          # Create the map canvas          # Create the map canvas
69          canvas = view.MapCanvas(self, -1, interactor)          canvas = view.MapCanvas(self, -1, interactor)
70            canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
71          self.canvas = canvas          self.canvas = canvas
72    
73          self.init_dialogs()          self.init_dialogs()
# Line 124  class MainWindow(wxFrame): Line 81  class MainWindow(wxFrame):
81          self.current_id = 6000          self.current_id = 6000
82          self.id_to_name = {}          self.id_to_name = {}
83          self.name_to_id = {}          self.name_to_id = {}
84            self.events_bound = {}
85    
86      def get_id(self, name):      def get_id(self, name):
87          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 136  class MainWindow(wxFrame): Line 94  class MainWindow(wxFrame):
94              self.name_to_id[name] = ID              self.name_to_id[name] = ID
95              self.id_to_name[ID] = name              self.id_to_name[ID] = name
96          return ID          return ID
97            
98        def bind_command_events(self, command, ID):
99            """Bind the necessary events for the given command and ID"""
100            if not self.events_bound.has_key(ID):
101                # the events haven't been bound yet
102                EVT_MENU(self, ID, self.invoke_command)
103                if command.IsDynamic():
104                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
105    
106        def build_menu_bar(self, menudesc):
107            """Build and return the menu bar from the menu description"""
108            menu_bar = wxMenuBar()
109    
110            for item in menudesc.items:
111                # here the items must all be Menu instances themselves
112                menu_bar.Append(self.build_menu(item), item.title)
113    
114            return menu_bar
115    
116        def build_menu(self, menudesc):
117            """Return a wxMenu built from the menu description menudesc"""
118            wxmenu = wxMenu()
119            last = None
120            for item in menudesc.items:
121                if item is None:
122                    # a separator. Only add one if the last item was not a
123                    # separator
124                    if last is not None:
125                        wxmenu.AppendSeparator()
126                elif isinstance(item, Menu):
127                    # a submenu
128                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
129                else:
130                    # must the name the name of a command
131                    self.add_menu_command(wxmenu, item)
132                last = item
133            return wxmenu
134    
135        def build_toolbar(self, toolbardesc):
136            """Build and return the main toolbar window from a toolbar description
137    
138            The parameter should be an instance of the Menu class but it
139            should not contain submenus.
140            """
141            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
142    
143            # set the size of the tools' bitmaps. Not needed on wxGTK, but
144            # on Windows, although it doesn't work very well there. It seems
145            # that only 16x16 icons are really supported on windows.
146            # We probably shouldn't hardwire the bitmap size here.
147            toolbar.SetToolBitmapSize(wxSize(24, 24))
148    
149            for item in toolbardesc.items:
150                if item is None:
151                    toolbar.AddSeparator()
152                else:
153                    # assume it's a string.
154                    self.add_toolbar_command(toolbar, item)
155    
156            return toolbar
157    
158      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
159          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
160    
# Line 150  class MainWindow(wxFrame): Line 168  class MainWindow(wxFrame):
168                  ID = self.get_id(name)                  ID = self.get_id(name)
169                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
170                              command.IsCheckCommand())                              command.IsCheckCommand())
171                  EVT_MENU(self, ID, self.invoke_command)                  self.bind_command_events(command, ID)
                 if command.IsDynamic():  
                     EVT_UPDATE_UI(self, ID, self.update_command_ui)  
172              else:              else:
173                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
174    
175      def add_toolbar_command(self, toolbar, name):      def add_toolbar_command(self, toolbar, name):
176          """Add the command with name name to the toolbar toolbar.          """Add the command with name name to the toolbar toolbar.
# Line 174  class MainWindow(wxFrame): Line 190  class MainWindow(wxFrame):
190                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
191                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
192                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
193                    self.bind_command_events(command, ID)
194              else:              else:
195                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
196    
197        def Context(self):
198            """Return the context object for a command invoked from this window
199            """
200            return Context(self.application, self.application.Session(), self)
201    
202      def invoke_command(self, event):      def invoke_command(self, event):
203          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
204          if name is not None:          if name is not None:
205              command = registry.Command(name)              command = registry.Command(name)
206              command.Execute(self)              command.Execute(self.Context())
207          else:          else:
208              print "Unknown command ID %d" % event.GetId()              print _("Unknown command ID %d") % event.GetId()
209    
210      def update_command_ui(self, event):      def update_command_ui(self, event):
211          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
212            context = self.Context()
213          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
214          if command is not None:          if command is not None:
215              event.Enable(command.Sensitive(self))              sensitive = command.Sensitive(context)
216              event.SetText(command.DynText(self))              event.Enable(sensitive)
217                if command.IsTool() and not sensitive and command.Checked(context):
218                    # When a checked tool command is disabled deselect all
219                    # tools. Otherwise the tool would remain active but it
220                    # might lead to errors if the tools stays active. This
221                    # problem occurred in GREAT-ER and this fixes it, but
222                    # it's not clear to me whether this is really the best
223                    # way to do it (BH, 20021206).
224                    self.canvas.SelectTool(None)
225                event.SetText(command.DynText(context))
226              if command.IsCheckCommand():              if command.IsCheckCommand():
227                  event.Check(command.Checked(self))                      event.Check(command.Checked(context))
228    
229      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
230          """Run a modla message box with the given text, title and flags          """Run a modal message box with the given text, title and flags
231          and return the result"""          and return the result"""
232          dlg = wxMessageDialog(self, text, title, flags)          dlg = wxMessageDialog(self, text, title, flags)
233            dlg.CenterOnParent()
234          result = dlg.ShowModal()          result = dlg.ShowModal()
235          dlg.Destroy()          dlg.Destroy()
236          return result          return result
# Line 211  class MainWindow(wxFrame): Line 244  class MainWindow(wxFrame):
244    
245      def add_dialog(self, name, dialog):      def add_dialog(self, name, dialog):
246          if self.dialogs.has_key(name):          if self.dialogs.has_key(name):
247              raise RuntimeError("The Dialog named %s is already open" % name)              raise RuntimeError(_("The Dialog named %s is already open") % name)
248          self.dialogs[name] = dialog          self.dialogs[name] = dialog
249    
250      def dialog_open(self, name):      def dialog_open(self, name):
# Line 223  class MainWindow(wxFrame): Line 256  class MainWindow(wxFrame):
256      def get_open_dialog(self, name):      def get_open_dialog(self, name):
257          return self.dialogs.get(name)          return self.dialogs.get(name)
258    
259        def view_position_changed(self):
260            pos = self.canvas.CurrentPosition()
261            if pos is not None:
262                text = "(%10.10g, %10.10g)" % pos
263            else:
264                text = ""
265            self.set_position_text(text)
266    
267        def set_position_text(self, text):
268            """Set the statusbar text showing the current position.
269    
270            By default the text is shown in field 0 of the status bar.
271            Override this method in derived classes to put it into a
272            different field of the statusbar.
273            """
274            self.SetStatusText(text)
275    
276      def save_modified_session(self, can_veto = 1):      def save_modified_session(self, can_veto = 1):
277          """If the current session has been modified, ask the user          """If the current session has been modified, ask the user
278          whether to save it and do so if requested. Return the outcome of          whether to save it and do so if requested. Return the outcome of
# Line 232  class MainWindow(wxFrame): Line 282  class MainWindow(wxFrame):
282          If the can_veto parameter is true (default) the dialog includes          If the can_veto parameter is true (default) the dialog includes
283          a cancel button, otherwise not.          a cancel button, otherwise not.
284          """          """
285          if main.app.session.WasModified():          if self.application.session.WasModified():
286              flags = wxYES_NO | wxICON_QUESTION              flags = wxYES_NO | wxICON_QUESTION
287              if can_veto:              if can_veto:
288                  flags = flags | wxCANCEL                  flags = flags | wxCANCEL
289              result = self.RunMessageBox("Exit",              result = self.RunMessageBox(_("Exit"),
290                                          ("The session has been modified."                                          _("The session has been modified."
291                                           " Do you want to save it?"),                                           " Do you want to save it?"),
292                                          flags)                                          flags)
293              if result == wxID_YES:              if result == wxID_YES:
# Line 248  class MainWindow(wxFrame): Line 298  class MainWindow(wxFrame):
298    
299      def NewSession(self):      def NewSession(self):
300          self.save_modified_session()          self.save_modified_session()
301          main.app.SetSession(create_empty_session())          self.application.SetSession(create_empty_session())
302    
303      def OpenSession(self):      def OpenSession(self):
304          self.save_modified_session()          self.save_modified_session()
305          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, _("Open Session"), ".", "",
306                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
307          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
308              main.app.OpenSession(dlg.GetPath())              self.application.OpenSession(dlg.GetPath())
309          dlg.Destroy()          dlg.Destroy()
310    
311      def SaveSession(self):      def SaveSession(self):
312          main.app.SaveSession()          if self.application.session.filename == None:
313                self.SaveSessionAs()
314            self.application.SaveSession()
315    
316      def SaveSessionAs(self):      def SaveSessionAs(self):
317          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, _("Save Session As"), ".", "",
318                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
319          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
320              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
321              main.app.SaveSession()              self.application.SaveSession()
322          dlg.Destroy()          dlg.Destroy()
323    
324      def Exit(self):      def Exit(self):
# Line 277  class MainWindow(wxFrame): Line 329  class MainWindow(wxFrame):
329          if result == wxID_CANCEL:          if result == wxID_CANCEL:
330              event.Veto()              event.Veto()
331          else:          else:
332                # FIXME: it would be better to tie the unsubscription to
333                # wx's destroy event, but that isn't implemented for wxGTK
334                # yet.
335                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
336              self.Destroy()              self.Destroy()
337    
338      def SetMap(self, map):      def SetMap(self, map):
339          self.canvas.SetMap(map)          self.canvas.SetMap(map)
340    
341        def Map(self):
342            """Return the map displayed by this mainwindow"""
343            return self.canvas.Map()
344    
345      def ShowSessionTree(self):      def ShowSessionTree(self):
346          name = "session_tree"          name = "session_tree"
347          dialog = self.get_open_dialog(name)          dialog = self.get_open_dialog(name)
348          if dialog is None:          if dialog is None:
349              dialog = tree.SessionTreeView(self, main.app, name)              dialog = tree.SessionTreeView(self, self.application, name)
350              self.add_dialog(name, dialog)              self.add_dialog(name, dialog)
351              dialog.Show(true)              dialog.Show(true)
352          else:          else:
# Line 294  class MainWindow(wxFrame): Line 354  class MainWindow(wxFrame):
354              pass              pass
355    
356      def About(self):      def About(self):
357          self.RunMessageBox("About",          self.RunMessageBox(_("About"),
358                             ("Thuban is a program for\n"                             _("Thuban is a program for\n"
359                              "exploring geographic data.\n"                              "exploring geographic data.\n"
360                              "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001-2003 Intevation GmbH.\n"
361                              "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GPL"),
362                             wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
363    
364      def AddLayer(self):      def AddLayer(self):
365          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, _("Select a data file"), ".", "", "*.*",
366                             wxOPEN)                             wxOPEN)
367          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
368              filename = dlg.GetPath()              filename = dlg.GetPath()
# Line 314  class MainWindow(wxFrame): Line 374  class MainWindow(wxFrame):
374                  map.AddLayer(layer)                  map.AddLayer(layer)
375              except IOError:              except IOError:
376                  # the layer couldn't be opened                  # the layer couldn't be opened
377                  self.RunMessageBox("Add Layer",                  self.RunMessageBox(_("Add Layer"),
378                                     "Can't open the file '%s'." % filename)                                     _("Can't open the file '%s'.") % filename)
379              else:              else:
380                  if not has_layers:                  if not has_layers:
381                      # if we're adding a layer to an empty map, for the                      # if we're adding a layer to an empty map, for the
# Line 328  class MainWindow(wxFrame): Line 388  class MainWindow(wxFrame):
388          if layer is not None:          if layer is not None:
389              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
390    
391        def CanRemoveLayer(self):
392            """Return true if the currently selected layer can be deleted.
393    
394            If no layer is selected return false.
395    
396            The return value of this method determines whether the remove
397            layer command is sensitive in menu.
398            """
399            layer = self.current_layer()
400            if layer is not None:
401                return self.canvas.Map().CanRemoveLayer(layer)
402            return 0
403    
404      def RaiseLayer(self):      def RaiseLayer(self):
405          layer = self.current_layer()          layer = self.current_layer()
406          if layer is not None:          if layer is not None:
407              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
408            
409      def LowerLayer(self):      def LowerLayer(self):
410          layer = self.current_layer()          layer = self.current_layer()
411          if layer is not None:          if layer is not None:
# Line 370  class MainWindow(wxFrame): Line 443  class MainWindow(wxFrame):
443          if layer is not None:          if layer is not None:
444              color = self.choose_color()              color = self.choose_color()
445              if color is not None:              if color is not None:
446                  layer.SetFill(color)                  layer.GetClassification().SetDefaultFill(color)
447    
448      def LayerTransparentFill(self):      def LayerTransparentFill(self):
449          layer = self.current_layer()          layer = self.current_layer()
450          if layer is not None:          if layer is not None:
451              layer.SetFill(None)              layer.GetClassification().SetDefaultFill(Color.None)
452    
453      def LayerOutlineColor(self):      def LayerOutlineColor(self):
454          layer = self.current_layer()          layer = self.current_layer()
455          if layer is not None:          if layer is not None:
456              color = self.choose_color()              color = self.choose_color()
457              if color is not None:              if color is not None:
458                  layer.SetStroke(color)                  layer.GetClassification().SetDefaultStroke(color)
459    
460      def LayerNoOutline(self):      def LayerNoOutline(self):
461          layer = self.current_layer()          layer = self.current_layer()
462          if layer is not None:          if layer is not None:
463              layer.SetStroke(None)              layer.GetClassification().SetDefaultStroke(Color.None)
464    
465      def HideLayer(self):      def HideLayer(self):
466          layer = self.current_layer()          layer = self.current_layer()
# Line 406  class MainWindow(wxFrame): Line 479  class MainWindow(wxFrame):
479              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
480              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
481              if dialog is None:              if dialog is None:
482                  dialog = tableview.TableFrame(self, self.interactor, name,                  dialog = tableview.LayerTableFrame(self, self.interactor, name,
483                                                "Table: %s" % layer.Title(),                                                     _("Table: %s") % layer.Title(),
484                                                layer, table)                                                     layer, table)
485                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
486                  dialog.Show(true)                  dialog.Show(true)
487              else:              else:
# Line 419  class MainWindow(wxFrame): Line 492  class MainWindow(wxFrame):
492          map = self.canvas.Map()          map = self.canvas.Map()
493          proj = map.projection          proj = map.projection
494          if proj is None:          if proj is None:
495              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None, map.BoundingBox())
496          else:          else:
497              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params,
498                                                   map.BoundingBox())
499          if proj4Dlg.ShowModal() == wxID_OK:          if proj4Dlg.ShowModal() == wxID_OK:
500              params = proj4Dlg.GetParams()              params = proj4Dlg.GetParams()
501              if params is not None:              if params is not None:
# Line 431  class MainWindow(wxFrame): Line 505  class MainWindow(wxFrame):
505              map.SetProjection(proj)              map.SetProjection(proj)
506          proj4Dlg.Destroy()          proj4Dlg.Destroy()
507    
508        def Classify(self):
509            classifyDlg = classifier.Classifier(NULL, self.current_layer())
510    
511            classifyDlg.ShowModal()
512            classifyDlg.Destroy()
513    
514      def ZoomInTool(self):      def ZoomInTool(self):
515          self.canvas.ZoomInTool()          self.canvas.ZoomInTool()
516    
# Line 471  class MainWindow(wxFrame): Line 551  class MainWindow(wxFrame):
551    
552  # Helper functions to define common command implementations  # Helper functions to define common command implementations
553  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
554      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
555      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
556    
557  def _method_command(name, title, method, helptext = "", sensitive = None):  def _method_command(name, title, method, helptext = "",
558      """Add a command implemented by a method of the context object"""                      icon = "", sensitive = None):
559        """Add a command implemented by a method of the mainwindow object"""
560      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
561                           helptext = helptext, sensitive = sensitive))                           helptext = helptext, icon = icon,
562                             sensitive = sensitive))
563    
564    def make_check_current_tool(toolname):
565        """Return a function that tests if the currently active tool is toolname
566    
567        The returned function can be called with the context and returns
568        true iff the currently active tool's name is toolname. It's directly
569        usable as the 'checked' callback of a command.
570        """
571        def check_current_tool(context, name=toolname):
572            return context.mainwindow.canvas.CurrentTool() == name
573        return check_current_tool
574    
575  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
576                    icon = ""):                    icon = "", sensitive = None):
577      """Add a tool command"""      """Add a tool command"""
578      def check_current_tool(context, name=toolname):      registry.Add(ToolCommand(name, title, call_method, args=(method,),
579          return context.canvas.CurrentTool() == name                               helptext = helptext, icon = icon,
580      registry.Add(Command(name, title, call_method, args=(method,),                               checked = make_check_current_tool(toolname),
581                           helptext = helptext, icon = icon,                               sensitive = sensitive))
                          checked = check_current_tool))  
582    
583  def _has_selected_layer(context):  def _has_selected_layer(context):
584      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
585      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
586    
587    def _can_remove_layer(context):
588        return context.mainwindow.CanRemoveLayer()
589    
590    def _has_tree_window_shown(context):
591        """Return true if the tree window is shown"""
592        return context.mainwindow.get_open_dialog("session_tree") is None
593    
594    def _has_visible_map(context):
595        """Return true iff theres a visible map in the mainwindow.
596    
597        A visible map is a map with at least one visible layer."""
598        map = context.mainwindow.Map()
599        if map is not None:
600            for layer in map.Layers():
601                if layer.Visible():
602                    return 1
603        return 0
604    
605    
606  # File menu  # File menu
607  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", _("&New Session"), "NewSession")
608  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", _("&Open Session"), "OpenSession")
609  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", _("&Save Session"), "SaveSession")
610  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", _("Save Session &As"), "SaveSessionAs")
611  _method_command("exit", "&Exit", "Exit")  _method_command("show_session_tree", _("Show Session &Tree"), "ShowSessionTree",
612                    sensitive = _has_tree_window_shown)
613    _method_command("exit", _("E&xit"), "Exit")
614    
615  # Help menu  # Help menu
616  _method_command("help_about", "&About", "About")  _method_command("help_about", _("&About"), "About")
617    
618    
619  # Map menu  # Map menu
620  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", _("Pro&jection"), "Projection")
621    
622  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", _("&Zoom in"), "ZoomInTool", "ZoomInTool",
623                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = _("Switch to map-mode 'zoom-in'"), icon = "zoom_in",
624  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",                sensitive = _has_visible_map)
625                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")  _tool_command("map_zoom_out_tool", _("Zoom &out"), "ZoomOutTool", "ZoomOutTool",
626  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",                helptext = _("Switch to map-mode 'zoom-out'"), icon = "zoom_out",
627                helptext = "Switch to map-mode 'pan'", icon = "pan")                sensitive = _has_visible_map)
628  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_pan_tool", _("&Pan"), "PanTool", "PanTool",
629                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = _("Switch to map-mode 'pan'"), icon = "pan",
630  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",                sensitive = _has_visible_map)
631                helptext = "Add/Remove labels", icon = "label")  _tool_command("map_identify_tool", _("&Identify"), "IdentifyTool",
632  _method_command("map_full_extent", "&Full extent", "FullExtent")                "IdentifyTool",
633  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")                helptext = _("Switch to map-mode 'identify'"), icon = "identify",
634                  sensitive = _has_visible_map)
635    _tool_command("map_label_tool", _("&Label"), "LabelTool", "LabelTool",
636                  helptext = _("Add/Remove labels"), icon = "label",
637                  sensitive = _has_visible_map)
638    _method_command("map_full_extent", _("&Full extent"), "FullExtent",
639                   helptext = _("Full Extent"), icon = "fullextent",
640                  sensitive = _has_visible_map)
641    _method_command("map_print", _("Prin&t"), "PrintMap",
642                    helptext = _("Print the map"))
643    
644  # Layer menu  # Layer menu
645  _method_command("layer_add", "&Add Layer", "AddLayer",  _method_command("layer_add", _("&Add Layer"), "AddLayer",
646                  helptext = "Add a new layer to active map")                  helptext = _("Add a new layer to active map"))
647  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",  _method_command("layer_remove", _("&Remove Layer"), "RemoveLayer",
648                  helptext = "Remove selected layer(s)",                  helptext = _("Remove selected layer(s)"),
649                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
650  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", _("&Fill Color"), "LayerFillColor",
651                  helptext = "Set the fill color of selected layer(s)",                  helptext = _("Set the fill color of selected layer(s)"),
652                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
653  _method_command("layer_transparent_fill", "&Transparent Fill",  _method_command("layer_transparent_fill", _("&Transparent Fill"),
654                  "LayerTransparentFill",                  "LayerTransparentFill",
655                  helptext = "Do not fill the selected layer(s)",                  helptext = _("Do not fill the selected layer(s)"),
656                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
657  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_outline_color", _("&Outline Color"), "LayerOutlineColor",
658                  helptext = "Set the outline color of selected layer(s)",                  helptext = _("Set the outline color of selected layer(s)"),
659                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
660  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_no_outline", _("&No Outline"), "LayerNoOutline",
661                  helptext = "Do not draw the outline of the selected layer(s)",                  helptext= _("Do not draw the outline of the selected layer(s)"),
662                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
663  _method_command("layer_raise", "&Raise", "RaiseLayer",  _method_command("layer_raise", _("&Raise"), "RaiseLayer",
664                  helptext = "Raise selected layer(s)",                  helptext = _("Raise selected layer(s)"),
665                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
666  _method_command("layer_lower", "&Lower", "LowerLayer",  _method_command("layer_lower", _("&Lower"), "LowerLayer",
667                  helptext = "Lower selected layer(s)",                  helptext = _("Lower selected layer(s)"),
668                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
669  _method_command("layer_show", "&Show", "ShowLayer",  _method_command("layer_show", _("&Show"), "ShowLayer",
670                  helptext = "Make selected layer(s) visible",                  helptext = _("Make selected layer(s) visible"),
671                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
672  _method_command("layer_hide", "&Hide", "HideLayer",  _method_command("layer_hide", _("&Hide"), "HideLayer",
673                  helptext = "Make selected layer(s) unvisible",                  helptext = _("Make selected layer(s) unvisible"),
674                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
675  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  _method_command("layer_show_table", _("Show Ta&ble"), "LayerShowTable",
676                  helptext = "Show the selected layer's table",                  helptext = _("Show the selected layer's table"),
677                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
678    
679    _method_command("layer_classifier", _("Classify"), "Classify",
680                    sensitive = _has_selected_layer)
681    
682    # the menu structure
683    main_menu = Menu("<main>", "<main>",
684                     [Menu("file", _("&File"),
685                           ["new_session", "open_session", None,
686                            "save_session", "save_session_as", None,
687                            "show_session_tree", None,
688                            "exit"]),
689                      Menu("map", _("&Map"),
690                           ["layer_add", "layer_remove",
691                            None,
692                            "map_projection",
693                            None,
694                            "map_zoom_in_tool", "map_zoom_out_tool",
695                            "map_pan_tool", "map_identify_tool", "map_label_tool",
696                            None,
697                            "map_full_extent",
698                            None,
699                            "map_print"]),
700                      Menu("layer", _("&Layer"),
701                           ["layer_fill_color", "layer_transparent_fill",
702                            "layer_outline_color", "layer_no_outline",
703                            None,
704                            "layer_raise", "layer_lower",
705                            None,
706                            "layer_show", "layer_hide",
707                            None,
708                            "layer_show_table",
709                            None,
710                            "layer_classifier"]),
711                      Menu("help", _("&Help"),
712                           ["help_about"])])
713    
714    # the main toolbar
715    
716    main_toolbar = Menu("<toolbar>", "<toolbar>",
717                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
718                         "map_full_extent", None,
719                         "map_identify_tool", "map_label_tool"])
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