/[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 821 by jonathan, Mon May 5 18:20:15 2003 UTC
# Line 1  Line 1 
1  # Copyright (C) 2001 by Intevation GmbH  # Copyright (C) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
# Line 12  The main window Line 12  The main window
12    
13  __version__ = "$Revision$"  __version__ = "$Revision$"
14    
15  import sys, os  __ThubanVersion__ = "0.2" #"$THUBAN_0_2$"
16    #__BuildDate__ = "$Date$"
17    
18    import os
19    
20  from wxPython.wx import *  from wxPython.wx import *
21    
22  import Thuban  import Thuban
23  from Thuban.Model.session import Session  from Thuban import _
24  from Thuban.Model.map import Map  from Thuban.Model.session import create_empty_session
25  from Thuban.Model.layer import Layer  from Thuban.Model.layer import Layer
26  from Thuban.Model.color import Color  from Thuban.Model.color import Color
27  from Thuban.Model.proj import Projection  from Thuban.Model.proj import Projection
# Line 27  import view Line 30  import view
30  import tree  import tree
31  import proj4dialog  import proj4dialog
32  import tableview, identifyview  import tableview, identifyview
33    from Thuban.UI.classifier import Classifier
34    import legend
35    from menu import Menu
36    
37    from context import Context
38    from command import registry, Command, ToolCommand
39    from messages import LAYER_SELECTED, SHAPES_SELECTED, VIEW_POSITION
40    
41    from Thuban.UI.dock import DockFrame
42    
43    import resource
44    
45  import main  import projdialog
 from command import registry, Command  
46    
47    
 # the directory where the toolbar icons are stored  
 bitmapdir = os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Bitmaps")  
 bitmapext = ".xpm"  
48    
49    class MainWindow(DockFrame):
50    
51  class MainWindow(wxFrame):      # Some messages that can be subscribed/unsubscribed directly through
52        # the MapCanvas come in fact from other objects. This is a map to
53        # map those messages to the names of the instance variables they
54        # actually come from. This delegation is implemented in the
55        # Subscribe and unsubscribed methods
56        delegated_messages = {LAYER_SELECTED: "canvas",
57                              SHAPES_SELECTED: "canvas"}
58    
59      def __init__(self, parent, ID):      # Methods delegated to some instance variables. The delegation is
60          wxFrame.__init__(self, parent, ID, 'Thuban',      # implemented in the __getattr__ method.
61                           wxDefaultPosition, wxSize(400, 300))      delegated_methods = {"SelectLayer": "canvas",
62                             "SelectShapes": "canvas",
63                             }
64    
65        def __init__(self, parent, ID, title, application, interactor,
66                     initial_message = None, size = wxSize(-1, -1)):
67            DockFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
68            #wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
69    
70            self.application = application
71    
72          self.CreateStatusBar()          self.CreateStatusBar()
73          self.SetStatusText("This is the wxPython-based "          if initial_message:
74                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
75    
76          self.identify_view = None          self.identify_view = None
77    
78          self.init_ids()          self.init_ids()
79    
80          menuBar = wxMenuBar()          # creat the menubar from the main_menu description
81            self.SetMenuBar(self.build_menu_bar(main_menu))
82    
83          menu = wxMenu()          # Similarly, create the toolbar from main_toolbar
84          menuBar.Append(menu, "&File");          toolbar = self.build_toolbar(main_toolbar)
85          for name in ["new_session", "open_session", None,          # call Realize to make sure that the tools appear.
86                       "save_session", "save_session_as", None,          toolbar.Realize()
                      "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")  
87    
         self.SetMenuBar(menuBar)  
   
         # 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)  
88    
89          # Create the map canvas          # Create the map canvas
90          canvas = view.MapCanvas(self, -1)          canvas = view.MapCanvas(self, -1)
91            canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
92            canvas.Subscribe(SHAPES_SELECTED, self.identify_view_on_demand)
93          self.canvas = canvas          self.canvas = canvas
94    
95          EVT_CLOSE(self, self.OnClose)          self.SetMainWindow(self.canvas)
96    
97            self.SetAutoLayout(True)
98    
99            self.init_dialogs()
100    
101            EVT_CLOSE(self, self._OnClose)
102    
103        def Subscribe(self, channel, *args):
104            """Subscribe a function to a message channel.
105    
106            If channel is one of the delegated messages call the appropriate
107            object's Subscribe method. Otherwise do nothing.
108            """
109            if channel in self.delegated_messages:
110                object = getattr(self, self.delegated_messages[channel])
111                object.Subscribe(channel, *args)
112            else:
113                print "Trying to subscribe to unsupported channel %s" % channel
114    
115        def Unsubscribe(self, channel, *args):
116            """Unsubscribe a function from a message channel.
117    
118            If channel is one of the delegated messages call the appropriate
119            object's Unsubscribe method. Otherwise do nothing.
120            """
121            if channel in self.delegated_messages:
122                object = getattr(self, self.delegated_messages[channel])
123                object.Unsubscribe(channel, *args)
124    
125        def __getattr__(self, attr):
126            """If attr is one of the delegated methods return that method
127    
128            Otherwise raise AttributeError.
129            """
130            if attr in self.delegated_methods:
131                return getattr(getattr(self, self.delegated_methods[attr]), attr)
132            raise AttributeError(attr)
133    
134      def init_ids(self):      def init_ids(self):
135          """Initialize the ids"""          """Initialize the ids"""
136          self.current_id = 6000          self.current_id = 6000
137          self.id_to_name = {}          self.id_to_name = {}
138          self.name_to_id = {}          self.name_to_id = {}
139            self.events_bound = {}
140    
141      def get_id(self, name):      def get_id(self, name):
142          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 121  class MainWindow(wxFrame): Line 149  class MainWindow(wxFrame):
149              self.name_to_id[name] = ID              self.name_to_id[name] = ID
150              self.id_to_name[ID] = name              self.id_to_name[ID] = name
151          return ID          return ID
152            
153        def bind_command_events(self, command, ID):
154            """Bind the necessary events for the given command and ID"""
155            if not self.events_bound.has_key(ID):
156                # the events haven't been bound yet
157                EVT_MENU(self, ID, self.invoke_command)
158                if command.IsDynamic():
159                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
160    
161        def build_menu_bar(self, menudesc):
162            """Build and return the menu bar from the menu description"""
163            menu_bar = wxMenuBar()
164    
165            for item in menudesc.items:
166                # here the items must all be Menu instances themselves
167                menu_bar.Append(self.build_menu(item), item.title)
168    
169            return menu_bar
170    
171        def build_menu(self, menudesc):
172            """Return a wxMenu built from the menu description menudesc"""
173            wxmenu = wxMenu()
174            last = None
175            for item in menudesc.items:
176                if item is None:
177                    # a separator. Only add one if the last item was not a
178                    # separator
179                    if last is not None:
180                        wxmenu.AppendSeparator()
181                elif isinstance(item, Menu):
182                    # a submenu
183                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
184                else:
185                    # must the name the name of a command
186                    self.add_menu_command(wxmenu, item)
187                last = item
188            return wxmenu
189    
190        def build_toolbar(self, toolbardesc):
191            """Build and return the main toolbar window from a toolbar description
192    
193            The parameter should be an instance of the Menu class but it
194            should not contain submenus.
195            """
196            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
197    
198            # set the size of the tools' bitmaps. Not needed on wxGTK, but
199            # on Windows, although it doesn't work very well there. It seems
200            # that only 16x16 icons are really supported on windows.
201            # We probably shouldn't hardwire the bitmap size here.
202            toolbar.SetToolBitmapSize(wxSize(24, 24))
203    
204            for item in toolbardesc.items:
205                if item is None:
206                    toolbar.AddSeparator()
207                else:
208                    # assume it's a string.
209                    self.add_toolbar_command(toolbar, item)
210    
211            return toolbar
212    
213      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
214          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
215    
# Line 135  class MainWindow(wxFrame): Line 223  class MainWindow(wxFrame):
223                  ID = self.get_id(name)                  ID = self.get_id(name)
224                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
225                              command.IsCheckCommand())                              command.IsCheckCommand())
226                  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)  
227              else:              else:
228                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
229    
230      def add_toolbar_command(self, toolbar, name):      def add_toolbar_command(self, toolbar, name):
231          """Add the command with name name to the toolbar toolbar.          """Add the command with name name to the toolbar toolbar.
# Line 154  class MainWindow(wxFrame): Line 240  class MainWindow(wxFrame):
240              command = registry.Command(name)              command = registry.Command(name)
241              if command is not None:              if command is not None:
242                  ID = self.get_id(name)                  ID = self.get_id(name)
243                  filename = os.path.join(bitmapdir, command.Icon()) + bitmapext                  bitmap = resource.GetBitmapResource(command.Icon(),
244                  bitmap = wxBitmap(filename, wxBITMAP_TYPE_XPM)                                                      wxBITMAP_TYPE_XPM)
245                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
246                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
247                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
248                    self.bind_command_events(command, ID)
249              else:              else:
250                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
251    
252        def Context(self):
253            """Return the context object for a command invoked from this window
254            """
255            return Context(self.application, self.application.Session(), self)
256    
257      def invoke_command(self, event):      def invoke_command(self, event):
258          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
259          if name is not None:          if name is not None:
260              command = registry.Command(name)              command = registry.Command(name)
261              command.Execute(self)              command.Execute(self.Context())
262          else:          else:
263              print "Unknown command ID %d" % event.GetId()              print _("Unknown command ID %d") % event.GetId()
264    
265      def update_command_ui(self, event):      def update_command_ui(self, event):
266          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
267            context = self.Context()
268          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
269          if command is not None:          if command is not None:
270              event.Enable(command.Sensitive(self))              sensitive = command.Sensitive(context)
271              event.Check(command.Checked(self))              event.Enable(sensitive)
272              event.SetText(command.DynText(self))              if command.IsTool() and not sensitive and command.Checked(context):
273                    # When a checked tool command is disabled deselect all
274                    # tools. Otherwise the tool would remain active but it
275                    # might lead to errors if the tools stays active. This
276                    # problem occurred in GREAT-ER and this fixes it, but
277                    # it's not clear to me whether this is really the best
278                    # way to do it (BH, 20021206).
279                    self.canvas.SelectTool(None)
280                event.SetText(command.DynText(context))
281                if command.IsCheckCommand():
282                        event.Check(command.Checked(context))
283    
284        def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
285            """Run a modal message box with the given text, title and flags
286            and return the result"""
287            dlg = wxMessageDialog(self, text, title, flags)
288            dlg.CenterOnParent()
289            result = dlg.ShowModal()
290            dlg.Destroy()
291            return result
292    
293        def init_dialogs(self):
294            """Initialize the dialog handling"""
295            # The mainwindow maintains a dict mapping names to open
296            # non-modal dialogs. The dialogs are put into this dict when
297            # they're created and removed when they're closed
298            self.dialogs = {}
299    
300        def add_dialog(self, name, dialog):
301            if self.dialogs.has_key(name):
302                raise RuntimeError(_("The Dialog named %s is already open") % name)
303            self.dialogs[name] = dialog
304    
305        def dialog_open(self, name):
306            return self.dialogs.has_key(name)
307    
308        def remove_dialog(self, name):
309            del self.dialogs[name]
310    
311        def get_open_dialog(self, name):
312            return self.dialogs.get(name)
313    
314        def view_position_changed(self):
315            pos = self.canvas.CurrentPosition()
316            if pos is not None:
317                text = "(%10.10g, %10.10g)" % pos
318            else:
319                text = ""
320            self.set_position_text(text)
321    
322        def set_position_text(self, text):
323            """Set the statusbar text showing the current position.
324    
325            By default the text is shown in field 0 of the status bar.
326            Override this method in derived classes to put it into a
327            different field of the statusbar.
328            """
329            self.SetStatusText(text)
330    
331        def save_modified_session(self, can_veto = 1):
332            """If the current session has been modified, ask the user
333            whether to save it and do so if requested. Return the outcome of
334            the dialog (either wxID_OK, wxID_CANCEL or wxID_NO). If the
335            dialog wasn't run return wxID_NO.
336    
337            If the can_veto parameter is true (default) the dialog includes
338            a cancel button, otherwise not.
339            """
340            if self.application.session.WasModified():
341                flags = wxYES_NO | wxICON_QUESTION
342                if can_veto:
343                    flags = flags | wxCANCEL
344                result = self.RunMessageBox(_("Exit"),
345                                            _("The session has been modified."
346                                             " Do you want to save it?"),
347                                            flags)
348                if result == wxID_YES:
349                    self.SaveSession()
350            else:
351                result = wxID_NO
352            return result
353    
354        def prepare_new_session(self):
355            for d in self.dialogs.values():
356                if not isinstance(d, tree.SessionTreeView):
357                    d.Close()
358    
359      def NewSession(self):      def NewSession(self):
360          session = Session("")          self.save_modified_session()
361          session.AddMap(Map(""))          self.prepare_new_session()
362          main.app.SetSession(session)          self.application.SetSession(create_empty_session())
363    
364      def OpenSession(self):      def OpenSession(self):
365          dlg = wxFileDialog(self, "Select a session file", ".", "",          self.save_modified_session()
366                             "*.session", wxOPEN)          dlg = wxFileDialog(self, _("Open Session"), ".", "", "*.thuban", wxOPEN)
367          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
368              main.app.OpenSession(dlg.GetPath())              self.prepare_new_session()
369                self.application.OpenSession(dlg.GetPath())
370          dlg.Destroy()          dlg.Destroy()
371    
372      def SaveSession(self):      def SaveSession(self):
373          main.app.SaveSession()          if self.application.session.filename == None:
374                self.SaveSessionAs()
375            else:
376                self.application.SaveSession()
377    
378      def SaveSessionAs(self):      def SaveSessionAs(self):
379          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, _("Save Session As"), ".", "",
380                             "*.session", wxOPEN)                             "*.thuban", wxSAVE|wxOVERWRITE_PROMPT)
381          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
382              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
383              main.app.SaveSession()              self.application.SaveSession()
384          dlg.Destroy()          dlg.Destroy()
385    
386      def Exit(self):      def Exit(self):
387          self.Close(false)          self.Close(False)
   
     def OnClose(self, event):  
         veto = 0  
         if main.app.session.WasModified():  
             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  
388    
389          if veto:      def _OnClose(self, event):
390            result = self.save_modified_session(can_veto = event.CanVeto())
391            if result == wxID_CANCEL:
392              event.Veto()              event.Veto()
393          else:          else:
394                # FIXME: it would be better to tie the unsubscription to
395                # wx's destroy event, but that isn't implemented for wxGTK
396                # yet.
397                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
398                DockFrame._OnClose(self, event)
399              self.Destroy()              self.Destroy()
400    
401      def SetMap(self, map):      def SetMap(self, map):
402          self.canvas.SetMap(map)          self.canvas.SetMap(map)
403            self.__SetTitle(map.Title())
404    
405            dialog = self.FindRegisteredDock("legend")
406            if dialog is not None:
407                dialog.GetPanel().SetMap(self.Map())
408    
409        def Map(self):
410            """Return the map displayed by this mainwindow"""
411    
412            return self.canvas.Map()
413    
414        def ToggleSessionTree(self):
415            """If the session tree is shown close it otherwise create a new tree"""
416            name = "session_tree"
417            dialog = self.get_open_dialog(name)
418            if dialog is None:
419                dialog = tree.SessionTreeView(self, self.application, name)
420                self.add_dialog(name, dialog)
421                dialog.Show(True)
422            else:
423                dialog.Close()
424    
425        def SessionTreeShown(self):
426            """Return true iff the session tree is currently shown"""
427            return self.get_open_dialog("session_tree") is not None
428    
429      def About(self):      def About(self):
430          dlg = wxMessageDialog(self,          self.RunMessageBox(_("About"),
431                                ("Thuban is a program for\n"                             _("Thuban v%s\n"
432                                 "exploring geographic data.\n"                              #"Build Date: %s\n"
433                                 "Copyright (C) 2001 Intevation GmbH.\n"                              "\n"
434                                 "Thuban is licensed under the GPL"),                              "Thuban is a program for\n"
435                                "About", wxOK | wxICON_INFORMATION)                              "exploring geographic data.\n"
436          dlg.ShowModal()                              "Copyright (C) 2001-2003 Intevation GmbH.\n"
437          dlg.Destroy()                              "Thuban is licensed under the GNU GPL"
438                               % __ThubanVersion__), #__BuildDate__)),
439                               wxOK | wxICON_INFORMATION)
440    
441      def AddLayer(self):      def AddLayer(self):
442          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, _("Select a data file"), ".", "", "*.*",
443                             wxOPEN)                             wxOPEN)
444          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
445              filename = dlg.GetPath()              filename = dlg.GetPath()
446              title = os.path.splitext(os.path.basename(filename))[0]              title = os.path.splitext(os.path.basename(filename))[0]
447              layer = Layer(title, filename)              store = self.application.Session().OpenShapefile(filename)
448              self.canvas.Map().AddLayer(layer)              layer = Layer(title, store)
449                map = self.canvas.Map()
450                has_layers = map.HasLayers()
451                try:
452                    map.AddLayer(layer)
453                except IOError:
454                    # the layer couldn't be opened
455                    self.RunMessageBox(_("Add Layer"),
456                                       _("Can't open the file '%s'.") % filename)
457                else:
458                    if not has_layers:
459                        # if we're adding a layer to an empty map, fit the
460                        # new map to the window
461                        self.canvas.FitMapToWindow()
462          dlg.Destroy()          dlg.Destroy()
463    
464      def RemoveLayer(self):      def RemoveLayer(self):
465          layer = self.current_layer()          layer = self.current_layer()
466          if layer is not None:          if layer is not None:
467              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
468          else:  
469              dlg = wxMessageDialog(self, "No layer is selected.\n",      def CanRemoveLayer(self):
470                                    "Remove layer", wxOK | wxICON_INFORMATION)          """Return true if the currently selected layer can be deleted.
471              dlg.ShowModal()  
472              dlg.Destroy()          If no layer is selected return False.
473    
474            The return value of this method determines whether the remove
475            layer command is sensitive in menu.
476            """
477            layer = self.current_layer()
478            if layer is not None:
479                return self.canvas.Map().CanRemoveLayer(layer)
480            return False
481    
482      def RaiseLayer(self):      def RaiseLayer(self):
483          layer = self.current_layer()          layer = self.current_layer()
484          if layer is not None:          if layer is not None:
485              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
486            
487      def LowerLayer(self):      def LowerLayer(self):
488          layer = self.current_layer()          layer = self.current_layer()
489          if layer is not None:          if layer is not None:
# Line 274  class MainWindow(wxFrame): Line 494  class MainWindow(wxFrame):
494    
495          If no layer is selected, return None          If no layer is selected, return None
496          """          """
497          tree = main.app.tree.tree          return self.canvas.SelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         if isinstance(layer, Layer):  
             return layer  
         return None  
498    
499      def has_selected_layer(self):      def has_selected_layer(self):
500          """Return true if a layer is currently selected"""          """Return true if a layer is currently selected"""
501          tree = main.app.tree.tree          return self.canvas.HasSelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         return isinstance(layer, Layer)  
502    
503      def choose_color(self):      def choose_color(self):
504          """Run the color selection dialog and return the selected color.          """Run the color selection dialog and return the selected color.
# Line 302  class MainWindow(wxFrame): Line 516  class MainWindow(wxFrame):
516          dlg.Destroy()          dlg.Destroy()
517          return color          return color
518    
     def LayerFillColor(self):  
         layer = self.current_layer()  
         if layer is not None:  
             color = self.choose_color()  
             if color is not None:  
                 layer.SetFill(color)  
   
     def LayerTransparentFill(self):  
         layer = self.current_layer()  
         if layer is not None:  
             layer.SetFill(None)  
   
     def LayerOutlineColor(self):  
         layer = self.current_layer()  
         if layer is not None:  
             color = self.choose_color()  
             if color is not None:  
                 layer.SetStroke(color)  
   
     def LayerNoOutline(self):  
         layer = self.current_layer()  
         if layer is not None:  
             layer.SetStroke(None)  
   
519      def HideLayer(self):      def HideLayer(self):
520          layer = self.current_layer()          layer = self.current_layer()
521          if layer is not None:          if layer is not None:
# Line 339  class MainWindow(wxFrame): Line 529  class MainWindow(wxFrame):
529      def LayerShowTable(self):      def LayerShowTable(self):
530          layer = self.current_layer()          layer = self.current_layer()
531          if layer is not None:          if layer is not None:
532              tv = tableview.TableFrame(self, layer.table)              table = layer.table
533              tv.Show(true)              name = "table_view" + str(id(table))
534                dialog = self.get_open_dialog(name)
535                if dialog is None:
536                    dialog = tableview.LayerTableFrame(self, name,
537                                                   _("Table: %s") % layer.Title(),
538                                                       layer, table)
539                    self.add_dialog(name, dialog)
540                    dialog.Show(true)
541                else:
542                    # FIXME: bring dialog to front here
543                    pass
544    
545        def MapProjection(self):
546    
547            name = "map_projection"
548            dialog = self.get_open_dialog(name)
549    
550            if dialog is None:
551                map = self.canvas.Map()
552                dialog = projdialog.ProjFrame(self, name,
553                         _("Map Projection: %s") % map.Title(), map)
554                self.add_dialog(name, dialog)
555                dialog.Show()
556            dialog.Raise()
557    
558        def LayerProjection(self):
559    
560            layer = self.current_layer()
561    
562            name = "layer_projection" + str(id(layer))
563            dialog = self.get_open_dialog(name)
564    
565      def Projection(self):          if dialog is None:
566          map = self.canvas.Map()              map = self.canvas.Map()
567          proj = map.projection              dialog = projdialog.ProjFrame(self, name,
568          if proj is None:                       _("Layer Projection: %s") % layer.Title(), layer)
569              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None)              self.add_dialog(name, dialog)
570                dialog.Show()
571            dialog.Raise()
572    
573        def LayerEditProperties(self):
574    
575            #
576            # the menu option for this should only be available if there
577            # is a current layer, so we don't need to check if the
578            # current layer is None
579            #
580    
581            layer = self.current_layer()
582            self.OpenLayerProperties(layer)
583    
584        def OpenLayerProperties(self, layer, group = None):
585            name = "layer_properties" + str(id(layer))
586            dialog = self.get_open_dialog(name)
587    
588            if dialog is None:
589                dialog = Classifier(self, name, layer, group)
590                self.add_dialog(name, dialog)
591                dialog.Show()
592            dialog.Raise()
593    
594    
595        def ShowLegend(self):
596            if not self.LegendShown():
597                self.ToggleLegend()
598    
599        def ToggleLegend(self):
600            """Show the legend if it's not shown otherwise hide it again"""
601            name = "legend"
602            dialog = self.FindRegisteredDock(name)
603    
604            if dialog is None:
605                dialog = self.CreateDock(name, -1, _("Legend"), wxLAYOUT_LEFT)
606                legend.LegendPanel(dialog, None, self)
607                dialog.Dock()
608                dialog.GetPanel().SetMap(self.Map())
609                dialog.Show()
610          else:          else:
611              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params)              dialog.Show(not dialog.IsShown())
612          if proj4Dlg.ShowModal() == wxID_OK:  
613              params = proj4Dlg.GetParams()      def LegendShown(self):
614              if params is not None:          """Return true iff the legend is currently open"""
615                  proj = Projection(params)          dialog = self.FindRegisteredDock("legend")
616              else:          return dialog is not None and dialog.IsShown()
                 proj = None  
             map.SetProjection(proj)  
         proj4Dlg.Destroy()  
617    
618      def ZoomInTool(self):      def ZoomInTool(self):
619          self.canvas.ZoomInTool()          self.canvas.ZoomInTool()
# Line 368  class MainWindow(wxFrame): Line 625  class MainWindow(wxFrame):
625          self.canvas.PanTool()          self.canvas.PanTool()
626    
627      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)  
628          self.canvas.IdentifyTool()          self.canvas.IdentifyTool()
629            self.identify_view_on_demand(None, None)
630    
631      def LabelTool(self):      def LabelTool(self):
632          self.canvas.LabelTool()          self.canvas.LabelTool()
# Line 379  class MainWindow(wxFrame): Line 634  class MainWindow(wxFrame):
634      def FullExtent(self):      def FullExtent(self):
635          self.canvas.FitMapToWindow()          self.canvas.FitMapToWindow()
636    
637        def FullLayerExtent(self):
638            self.canvas.FitLayerToWindow(self.current_layer())
639    
640      def PrintMap(self):      def PrintMap(self):
641          self.canvas.Print()          self.canvas.Print()
642    
643        def RenameMap(self):
644            dlg = wxTextEntryDialog(self, "Map Title: ", "Rename Map",
645                                    self.Map().Title())
646            if dlg.ShowModal() == wxID_OK:
647                title = dlg.GetValue()
648                if title != "":
649                    self.Map().SetTitle(title)
650                    self.__SetTitle(title)
651    
652            dlg.Destroy()
653    
654        def identify_view_on_demand(self, layer, shapes):
655            """Subscribed to the canvas' SHAPES_SELECTED message
656    
657            If the current tool is the identify tool, at least one shape is
658            selected and the identify dialog is not shown, show the dialog.
659            """
660            # If the selection has become empty we don't need to do
661            # anything. Otherwise it could happen that the dialog was popped
662            # up when the selection became empty, e.g. when a new selection
663            # is opened while the identify tool is active and dialog had
664            # been closed
665            if not shapes:
666                return
667    
668            name = "identify_view"
669            if self.canvas.CurrentTool() == "IdentifyTool":
670                if not self.dialog_open(name):
671                    dialog = identifyview.IdentifyView(self, name)
672                    self.add_dialog(name, dialog)
673                    dialog.Show(True)
674                else:
675                    # FIXME: bring dialog to front?
676                    pass
677    
678        def __SetTitle(self, title):
679            self.SetTitle("Thuban - " + title)
680    
681  #  #
682  # Define all the commands available in the main window  # Define all the commands available in the main window
# Line 390  class MainWindow(wxFrame): Line 685  class MainWindow(wxFrame):
685    
686  # Helper functions to define common command implementations  # Helper functions to define common command implementations
687  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
688      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
689      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
690    
691  def _method_command(name, title, method, helptext = "", sensitive = None):  def _method_command(name, title, method, helptext = "",
692      """Add a command implemented by a method of the context object"""                      icon = "", sensitive = None, checked = None):
693        """Add a command implemented by a method of the mainwindow object"""
694      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
695                           helptext = helptext, sensitive = sensitive))                           helptext = helptext, icon = icon,
696                             sensitive = sensitive, checked = checked))
697    
698    def make_check_current_tool(toolname):
699        """Return a function that tests if the currently active tool is toolname
700    
701        The returned function can be called with the context and returns
702        true iff the currently active tool's name is toolname. It's directly
703        usable as the 'checked' callback of a command.
704        """
705        def check_current_tool(context, name=toolname):
706            return context.mainwindow.canvas.CurrentTool() == name
707        return check_current_tool
708    
709  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
710                    icon = ""):                    icon = "", sensitive = None):
711      """Add a tool command"""      """Add a tool command"""
712      def check_current_tool(context, name=toolname):      registry.Add(ToolCommand(name, title, call_method, args=(method,),
713          return context.canvas.CurrentTool() == name                               helptext = helptext, icon = icon,
714      registry.Add(Command(name, title, call_method, args=(method,),                               checked = make_check_current_tool(toolname),
715                           helptext = helptext, icon = icon,                               sensitive = sensitive))
                          checked = check_current_tool))  
716    
717  def _has_selected_layer(context):  def _has_selected_layer(context):
718      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
719      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
720    
721    def _can_remove_layer(context):
722        return context.mainwindow.CanRemoveLayer()
723    
724    def _has_tree_window_shown(context):
725        """Return true if the tree window is shown"""
726        return context.mainwindow.SessionTreeShown()
727    
728    def _has_visible_map(context):
729        """Return true iff theres a visible map in the mainwindow.
730    
731        A visible map is a map with at least one visible layer."""
732        map = context.mainwindow.Map()
733        if map is not None:
734            for layer in map.Layers():
735                if layer.Visible():
736                    return 1
737        return 0
738    
739    def _has_legend_shown(context):
740        """Return true if the legend window is shown"""
741        return context.mainwindow.LegendShown()
742    
743    
744  # File menu  # File menu
745  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", _("&New Session"), "NewSession")
746  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", _("&Open Session..."), "OpenSession")
747  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", _("&Save Session"), "SaveSession")
748  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", _("Save Session &As..."), "SaveSessionAs")
749  _method_command("exit", "&Exit", "Exit")  _method_command("toggle_session_tree", _("Session &Tree"), "ToggleSessionTree",
750                    checked = _has_tree_window_shown)
751    _method_command("toggle_legend", _("Legend"), "ToggleLegend",
752                    checked = _has_legend_shown)
753    _method_command("exit", _("E&xit"), "Exit")
754    
755  # Help menu  # Help menu
756  _method_command("help_about", "&About", "About")  _method_command("help_about", _("&About..."), "About")
757    
758    
759  # Map menu  # Map menu
760  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", _("Pro&jection..."), "MapProjection")
761    
762  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", _("&Zoom in"), "ZoomInTool", "ZoomInTool",
763                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = _("Switch to map-mode 'zoom-in'"), icon = "zoom_in",
764  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",                sensitive = _has_visible_map)
765                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")  _tool_command("map_zoom_out_tool", _("Zoom &out"), "ZoomOutTool", "ZoomOutTool",
766  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",                helptext = _("Switch to map-mode 'zoom-out'"), icon = "zoom_out",
767                helptext = "Switch to map-mode 'pan'", icon = "pan")                sensitive = _has_visible_map)
768  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_pan_tool", _("&Pan"), "PanTool", "PanTool",
769                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = _("Switch to map-mode 'pan'"), icon = "pan",
770  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",                sensitive = _has_visible_map)
771                helptext = "Add/Remove labels", icon = "label")  _tool_command("map_identify_tool", _("&Identify"), "IdentifyTool",
772  _method_command("map_full_extent", "&Full extent", "FullExtent")                "IdentifyTool",
773  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")                helptext = _("Switch to map-mode 'identify'"), icon = "identify",
774                  sensitive = _has_visible_map)
775    _tool_command("map_label_tool", _("&Label"), "LabelTool", "LabelTool",
776                  helptext = _("Add/Remove labels"), icon = "label",
777                  sensitive = _has_visible_map)
778    _method_command("map_full_extent", _("&Full extent"), "FullExtent",
779                   helptext = _("Full Extent"), icon = "fullextent",
780                  sensitive = _has_visible_map)
781    _method_command("layer_full_extent", _("&Full layer extent"), "FullLayerExtent",
782                   helptext = _("Full Layer Extent"), icon = "fullextent",
783                  sensitive = _has_selected_layer)
784    _method_command("map_print", _("Prin&t"), "PrintMap",
785                    helptext = _("Print the map"))
786    _method_command("map_rename", _("&Rename..."), "RenameMap",
787                    helptext = _("Rename the map"))
788    _method_command("layer_add", _("&Add Layer..."), "AddLayer",
789                    helptext = _("Add a new layer to active map"))
790    _method_command("layer_remove", _("&Remove Layer"), "RemoveLayer",
791                    helptext = _("Remove selected layer(s)"),
792                    sensitive = _can_remove_layer)
793    
794  # Layer menu  # Layer menu
795  _method_command("layer_add", "&Add", "AddLayer",  _method_command("layer_projection", _("Pro&jection..."), "LayerProjection",
                 helptext = "Add a new layer to active map")  
 _method_command("layer_remove", "&Remove", "RemoveLayer",  
                 helptext = "Remove selected layer(s)",  
                 sensitive = _has_selected_layer)  
 _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  
                 helptext = "Set the fill color of selected layer(s)",  
796                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
797  _method_command("layer_transparent_fill", "&Transparent Fill",  _method_command("layer_raise", _("&Raise"), "RaiseLayer",
798                  "LayerTransparentFill",                  helptext = _("Raise selected layer(s)"),
                 helptext = "Do not fill the selected layer(s)",  
799                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
800  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_lower", _("&Lower"), "LowerLayer",
801                  helptext = "Set the outline color of selected layer(s)",                  helptext = _("Lower selected layer(s)"),
802                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
803  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_show", _("&Show"), "ShowLayer",
804                  helptext = "Do not draw the outline of the selected layer(s)",                  helptext = _("Make selected layer(s) visible"),
805                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
806  _method_command("layer_raise", "&Raise", "RaiseLayer",  _method_command("layer_hide", _("&Hide"), "HideLayer",
807                  helptext = "Raise selected layer(s)",                  helptext = _("Make selected layer(s) unvisible"),
808                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
809  _method_command("layer_lower", "&Lower", "LowerLayer",  _method_command("layer_show_table", _("Show Ta&ble"), "LayerShowTable",
810                  helptext = "Lower selected layer(s)",                  helptext = _("Show the selected layer's table"),
811                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
812  _method_command("layer_show", "&Show", "ShowLayer",  _method_command("layer_properties", _("&Properties..."), "LayerEditProperties",
                 helptext = "Make selected layer(s) visible",  
                 sensitive = _has_selected_layer)  
 _method_command("layer_hide", "&Hide", "HideLayer",  
                 helptext = "Make selected layer(s) unvisible",  
                 sensitive = _has_selected_layer)  
 _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  
                 helptext = "Show the selected layer's table",  
813                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
814    
815    # the menu structure
816    main_menu = Menu("<main>", "<main>",
817                     [Menu("file", _("&File"),
818                           ["new_session", "open_session", None,
819                            "save_session", "save_session_as", None,
820                            "toggle_session_tree", None,
821                            "exit"]),
822                      Menu("map", _("&Map"),
823                           ["layer_add", "layer_remove", "map_rename",
824                            None,
825                            "map_projection",
826                            None,
827                            "map_zoom_in_tool", "map_zoom_out_tool",
828                            "map_pan_tool", "map_full_extent", "layer_full_extent",
829                            None,
830                            "map_identify_tool", "map_label_tool",
831                            None,
832                            "toggle_legend",
833                            None,
834                            "map_print"]),
835                      Menu("layer", _("&Layer"),
836                            ["layer_raise", "layer_lower",
837                            None,
838                            "layer_show", "layer_hide",
839                            None,
840                            "layer_show_table",
841                            None,
842                            "layer_projection",
843                            "layer_properties"]),
844                      Menu("help", _("&Help"),
845                           ["help_about"])])
846    
847    # the main toolbar
848    
849    main_toolbar = Menu("<toolbar>", "<toolbar>",
850                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
851                         "map_full_extent", None,
852                         "map_identify_tool", "map_label_tool"])
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