/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 18 by bh, Mon Sep 3 16:25:09 2001 UTC revision 550 by jonathan, Thu Mar 20 09:45:19 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    import classifier
34  import main  import legend
35  from command import registry, Command  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    
42  # the directory where the toolbar icons are stored  # the directory where the toolbar icons are stored
# Line 39  bitmapext = ".xpm" Line 46  bitmapext = ".xpm"
46    
47  class MainWindow(wxFrame):  class MainWindow(wxFrame):
48    
49      def __init__(self, parent, ID):      # Some messages that can be subscribed/unsubscribed directly through
50          wxFrame.__init__(self, parent, ID, 'Thuban',      # the MapCanvas come in fact from other objects. This is a map to
51                           wxDefaultPosition, wxSize(400, 300))      # map those messages to the names of the instance variables they
52        # actually come from. This delegation is implemented in the
53        # Subscribe and unsubscribed methods
54        delegated_messages = {LAYER_SELECTED: "canvas",
55                              SHAPES_SELECTED: "canvas"}
56    
57        # Methods delegated to some instance variables. The delegation is
58        # implemented in the __getattr__ method.
59        delegated_methods = {"SelectLayer": "canvas",
60                             "SelectShapes": "canvas",
61                             }
62    
63        def __init__(self, parent, ID, title, application, interactor,
64                     initial_message = None, size = wxSize(-1, -1)):
65            wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
66    
67            self.application = application
68    
69          self.CreateStatusBar()          self.CreateStatusBar()
70          self.SetStatusText("This is the wxPython-based "          if initial_message:
71                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
72    
73          self.identify_view = None          self.identify_view = None
74    
75          self.init_ids()          self.init_ids()
76    
77          menuBar = wxMenuBar()          # creat the menubar from the main_menu description
78            self.SetMenuBar(self.build_menu_bar(main_menu))
79    
80          menu = wxMenu()          # Similarly, create the toolbar from main_toolbar
81          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 ["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")  
   
         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)  
82          # call Realize to make sure that the tools appear.          # call Realize to make sure that the tools appear.
83          toolbar.Realize()          toolbar.Realize()
84    
85          # Create the map canvas          # Create the map canvas
86          canvas = view.MapCanvas(self, -1)          canvas = view.MapCanvas(self, -1)
87            canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
88            canvas.Subscribe(SHAPES_SELECTED, self.identify_view_on_demand)
89          self.canvas = canvas          self.canvas = canvas
90    
91            self.init_dialogs()
92    
93          EVT_CLOSE(self, self.OnClose)          EVT_CLOSE(self, self.OnClose)
94    
95        def Subscribe(self, channel, *args):
96            """Subscribe a function to a message channel.
97    
98            If channel is one of the delegated messages call the appropriate
99            object's Subscribe method. Otherwise do nothing.
100            """
101            if channel in self.delegated_messages:
102                object = getattr(self, self.delegated_messages[channel])
103                object.Subscribe(channel, *args)
104            else:
105                print "Trying to subscribe to unsupported channel %s" % channel
106    
107        def Unsubscribe(self, channel, *args):
108            """Unsubscribe a function from a message channel.
109    
110            If channel is one of the delegated messages call the appropriate
111            object's Unsubscribe method. Otherwise do nothing.
112            """
113            if channel in self.delegated_messages:
114                object = getattr(self, self.delegated_messages[channel])
115                object.Unsubscribe(channel, *args)
116    
117        def __getattr__(self, attr):
118            """If attr is one of the delegated methods return that method
119    
120            Otherwise raise AttributeError.
121            """
122            if attr in self.delegated_methods:
123                return getattr(getattr(self, self.delegated_methods[attr]), attr)
124            raise AttributeError(attr)
125    
126      def init_ids(self):      def init_ids(self):
127          """Initialize the ids"""          """Initialize the ids"""
128          self.current_id = 6000          self.current_id = 6000
129          self.id_to_name = {}          self.id_to_name = {}
130          self.name_to_id = {}          self.name_to_id = {}
131            self.events_bound = {}
132    
133      def get_id(self, name):      def get_id(self, name):
134          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 123  class MainWindow(wxFrame): Line 141  class MainWindow(wxFrame):
141              self.name_to_id[name] = ID              self.name_to_id[name] = ID
142              self.id_to_name[ID] = name              self.id_to_name[ID] = name
143          return ID          return ID
144            
145        def bind_command_events(self, command, ID):
146            """Bind the necessary events for the given command and ID"""
147            if not self.events_bound.has_key(ID):
148                # the events haven't been bound yet
149                EVT_MENU(self, ID, self.invoke_command)
150                if command.IsDynamic():
151                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
152    
153        def build_menu_bar(self, menudesc):
154            """Build and return the menu bar from the menu description"""
155            menu_bar = wxMenuBar()
156    
157            for item in menudesc.items:
158                # here the items must all be Menu instances themselves
159                menu_bar.Append(self.build_menu(item), item.title)
160    
161            return menu_bar
162    
163        def build_menu(self, menudesc):
164            """Return a wxMenu built from the menu description menudesc"""
165            wxmenu = wxMenu()
166            last = None
167            for item in menudesc.items:
168                if item is None:
169                    # a separator. Only add one if the last item was not a
170                    # separator
171                    if last is not None:
172                        wxmenu.AppendSeparator()
173                elif isinstance(item, Menu):
174                    # a submenu
175                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
176                else:
177                    # must the name the name of a command
178                    self.add_menu_command(wxmenu, item)
179                last = item
180            return wxmenu
181    
182        def build_toolbar(self, toolbardesc):
183            """Build and return the main toolbar window from a toolbar description
184    
185            The parameter should be an instance of the Menu class but it
186            should not contain submenus.
187            """
188            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
189    
190            # set the size of the tools' bitmaps. Not needed on wxGTK, but
191            # on Windows, although it doesn't work very well there. It seems
192            # that only 16x16 icons are really supported on windows.
193            # We probably shouldn't hardwire the bitmap size here.
194            toolbar.SetToolBitmapSize(wxSize(24, 24))
195    
196            for item in toolbardesc.items:
197                if item is None:
198                    toolbar.AddSeparator()
199                else:
200                    # assume it's a string.
201                    self.add_toolbar_command(toolbar, item)
202    
203            return toolbar
204    
205      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
206          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
207    
# Line 137  class MainWindow(wxFrame): Line 215  class MainWindow(wxFrame):
215                  ID = self.get_id(name)                  ID = self.get_id(name)
216                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
217                              command.IsCheckCommand())                              command.IsCheckCommand())
218                  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)  
219              else:              else:
220                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
221    
222      def add_toolbar_command(self, toolbar, name):      def add_toolbar_command(self, toolbar, name):
223          """Add the command with name name to the toolbar toolbar.          """Add the command with name name to the toolbar toolbar.
# Line 161  class MainWindow(wxFrame): Line 237  class MainWindow(wxFrame):
237                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
238                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
239                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
240                    self.bind_command_events(command, ID)
241              else:              else:
242                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
243    
244        def Context(self):
245            """Return the context object for a command invoked from this window
246            """
247            return Context(self.application, self.application.Session(), self)
248    
249      def invoke_command(self, event):      def invoke_command(self, event):
250          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
251          if name is not None:          if name is not None:
252              command = registry.Command(name)              command = registry.Command(name)
253              command.Execute(self)              command.Execute(self.Context())
254          else:          else:
255              print "Unknown command ID %d" % event.GetId()              print _("Unknown command ID %d") % event.GetId()
256    
257      def update_command_ui(self, event):      def update_command_ui(self, event):
258          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
259            context = self.Context()
260          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
261          if command is not None:          if command is not None:
262              event.Enable(command.Sensitive(self))              sensitive = command.Sensitive(context)
263              event.SetText(command.DynText(self))              event.Enable(sensitive)
264                if command.IsTool() and not sensitive and command.Checked(context):
265                    # When a checked tool command is disabled deselect all
266                    # tools. Otherwise the tool would remain active but it
267                    # might lead to errors if the tools stays active. This
268                    # problem occurred in GREAT-ER and this fixes it, but
269                    # it's not clear to me whether this is really the best
270                    # way to do it (BH, 20021206).
271                    self.canvas.SelectTool(None)
272                event.SetText(command.DynText(context))
273              if command.IsCheckCommand():              if command.IsCheckCommand():
274                  event.Check(command.Checked(self))                      event.Check(command.Checked(context))
275    
276        def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
277            """Run a modal message box with the given text, title and flags
278            and return the result"""
279            dlg = wxMessageDialog(self, text, title, flags)
280            dlg.CenterOnParent()
281            result = dlg.ShowModal()
282            dlg.Destroy()
283            return result
284    
285        def init_dialogs(self):
286            """Initialize the dialog handling"""
287            # The mainwindow maintains a dict mapping names to open
288            # non-modal dialogs. The dialogs are put into this dict when
289            # they're created and removed when they're closed
290            self.dialogs = {}
291    
292        def add_dialog(self, name, dialog):
293            if self.dialogs.has_key(name):
294                raise RuntimeError(_("The Dialog named %s is already open") % name)
295            self.dialogs[name] = dialog
296    
297        def dialog_open(self, name):
298            return self.dialogs.has_key(name)
299    
300        def remove_dialog(self, name):
301            del self.dialogs[name]
302    
303        def get_open_dialog(self, name):
304            return self.dialogs.get(name)
305    
306        def view_position_changed(self):
307            pos = self.canvas.CurrentPosition()
308            if pos is not None:
309                text = "(%10.10g, %10.10g)" % pos
310            else:
311                text = ""
312            self.set_position_text(text)
313    
314        def set_position_text(self, text):
315            """Set the statusbar text showing the current position.
316    
317            By default the text is shown in field 0 of the status bar.
318            Override this method in derived classes to put it into a
319            different field of the statusbar.
320            """
321            self.SetStatusText(text)
322    
323        def save_modified_session(self, can_veto = 1):
324            """If the current session has been modified, ask the user
325            whether to save it and do so if requested. Return the outcome of
326            the dialog (either wxID_OK, wxID_CANCEL or wxID_NO). If the
327            dialog wasn't run return wxID_NO.
328    
329            If the can_veto parameter is true (default) the dialog includes
330            a cancel button, otherwise not.
331            """
332            if self.application.session.WasModified():
333                flags = wxYES_NO | wxICON_QUESTION
334                if can_veto:
335                    flags = flags | wxCANCEL
336                result = self.RunMessageBox(_("Exit"),
337                                            _("The session has been modified."
338                                             " Do you want to save it?"),
339                                            flags)
340                if result == wxID_YES:
341                    self.SaveSession()
342            else:
343                result = wxID_NO
344            return result
345    
346        def prepare_new_session(self):
347            for d in self.dialogs.values():
348                if not isinstance(d, tree.SessionTreeView):
349                    d.Close()
350    
351      def NewSession(self):      def NewSession(self):
352          session = Session("")          self.save_modified_session()
353          session.AddMap(Map(""))          self.prepare_new_session()
354          main.app.SetSession(session)          self.application.SetSession(create_empty_session())
355    
356      def OpenSession(self):      def OpenSession(self):
357          dlg = wxFileDialog(self, "Select a session file", ".", "",          self.save_modified_session()
358                             "*.session", wxOPEN)          dlg = wxFileDialog(self, _("Open Session"), ".", "", "*.thuban", wxOPEN)
359          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
360              main.app.OpenSession(dlg.GetPath())              self.prepare_new_session()
361                self.application.OpenSession(dlg.GetPath())
362          dlg.Destroy()          dlg.Destroy()
363    
364      def SaveSession(self):      def SaveSession(self):
365          main.app.SaveSession()          if self.application.session.filename == None:
366                self.SaveSessionAs()
367            else:
368                self.application.SaveSession()
369    
370      def SaveSessionAs(self):      def SaveSessionAs(self):
371          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, _("Save Session As"), ".", "",
372                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
373          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
374              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
375              main.app.SaveSession()              self.application.SaveSession()
376          dlg.Destroy()          dlg.Destroy()
377    
378      def Exit(self):      def Exit(self):
379          self.Close(false)          self.Close(false)
380    
381      def OnClose(self, event):      def OnClose(self, event):
382          veto = 0          result = self.save_modified_session(can_veto = event.CanVeto())
383          if main.app.session.WasModified():          if result == wxID_CANCEL:
             flags = wxYES_NO | wxICON_QUESTION  
             if event.CanVeto():  
                 flags = flags | wxCANCEL  
             dlg = wxMessageDialog(self,  
                                   ("The session has been modified."  
                                    " Do you want to save it?"),  
                                   "Exit", flags)  
             result = dlg.ShowModal()  
             dlg.Destroy()  
             if result == wxID_YES:  
                 self.SaveSession()  
             elif result == wxID_CANCEL:  
                 veto = 1  
   
         if veto:  
384              event.Veto()              event.Veto()
385          else:          else:
386                # FIXME: it would be better to tie the unsubscription to
387                # wx's destroy event, but that isn't implemented for wxGTK
388                # yet.
389                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
390              self.Destroy()              self.Destroy()
391    
392      def SetMap(self, map):      def SetMap(self, map):
393          self.canvas.SetMap(map)          self.canvas.SetMap(map)
394    
395        def Map(self):
396            """Return the map displayed by this mainwindow"""
397            return self.canvas.Map()
398    
399        def ShowSessionTree(self):
400            name = "session_tree"
401            dialog = self.get_open_dialog(name)
402            if dialog is None:
403                dialog = tree.SessionTreeView(self, self.application, name)
404                self.add_dialog(name, dialog)
405                dialog.Show(True)
406            else:
407                # FIXME: bring dialog to front here
408                pass
409    
410    
411      def About(self):      def About(self):
412          dlg = wxMessageDialog(self,          self.RunMessageBox(_("About"),
413                                ("Thuban is a program for\n"                             _("Thuban v%s\n"
414                                 "exploring geographic data.\n"                              #"Build Date: %s\n"
415                                 "Copyright (C) 2001 Intevation GmbH.\n"                              "\n"
416                                 "Thuban is licensed under the GPL"),                              "Thuban is a program for\n"
417                                "About", wxOK | wxICON_INFORMATION)                              "exploring geographic data.\n"
418          dlg.ShowModal()                              "Copyright (C) 2001-2003 Intevation GmbH.\n"
419          dlg.Destroy()                              "Thuban is licensed under the GNU GPL"
420                               % __ThubanVersion__), #__BuildDate__)),
421                               wxOK | wxICON_INFORMATION)
422    
423      def AddLayer(self):      def AddLayer(self):
424          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, _("Select a data file"), ".", "", "*.*",
425                             wxOPEN)                             wxOPEN)
426          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
427              filename = dlg.GetPath()              filename = dlg.GetPath()
# Line 251  class MainWindow(wxFrame): Line 429  class MainWindow(wxFrame):
429              layer = Layer(title, filename)              layer = Layer(title, filename)
430              map = self.canvas.Map()              map = self.canvas.Map()
431              has_layers = map.HasLayers()              has_layers = map.HasLayers()
432              map.AddLayer(layer)              try:
433              if not has_layers:                  map.AddLayer(layer)
434                  # if we're adding a layer to an empty map, for the new              except IOError:
435                  # map to the window                  # the layer couldn't be opened
436                  self.canvas.FitMapToWindow()                  self.RunMessageBox(_("Add Layer"),
437                                       _("Can't open the file '%s'.") % filename)
438                else:
439                    if not has_layers:
440                        # if we're adding a layer to an empty map, fit the
441                        # new map to the window
442                        self.canvas.FitMapToWindow()
443          dlg.Destroy()          dlg.Destroy()
444    
445      def RemoveLayer(self):      def RemoveLayer(self):
446          layer = self.current_layer()          layer = self.current_layer()
447          if layer is not None:          if layer is not None:
448              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
449          else:  
450              dlg = wxMessageDialog(self, "No layer is selected.\n",      def CanRemoveLayer(self):
451                                    "Remove layer", wxOK | wxICON_INFORMATION)          """Return true if the currently selected layer can be deleted.
452              dlg.ShowModal()  
453              dlg.Destroy()          If no layer is selected return false.
454    
455            The return value of this method determines whether the remove
456            layer command is sensitive in menu.
457            """
458            layer = self.current_layer()
459            if layer is not None:
460                return self.canvas.Map().CanRemoveLayer(layer)
461            return 0
462    
463      def RaiseLayer(self):      def RaiseLayer(self):
464          layer = self.current_layer()          layer = self.current_layer()
465          if layer is not None:          if layer is not None:
466              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
467            
468      def LowerLayer(self):      def LowerLayer(self):
469          layer = self.current_layer()          layer = self.current_layer()
470          if layer is not None:          if layer is not None:
# Line 283  class MainWindow(wxFrame): Line 475  class MainWindow(wxFrame):
475    
476          If no layer is selected, return None          If no layer is selected, return None
477          """          """
478          tree = main.app.tree.tree          return self.canvas.SelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         if isinstance(layer, Layer):  
             return layer  
         return None  
479    
480      def has_selected_layer(self):      def has_selected_layer(self):
481          """Return true if a layer is currently selected"""          """Return true if a layer is currently selected"""
482          tree = main.app.tree.tree          return self.canvas.HasSelectedLayer()
         layer = tree.GetPyData(tree.GetSelection())  
         return isinstance(layer, Layer)  
483    
484      def choose_color(self):      def choose_color(self):
485          """Run the color selection dialog and return the selected color.          """Run the color selection dialog and return the selected color.
# Line 316  class MainWindow(wxFrame): Line 502  class MainWindow(wxFrame):
502          if layer is not None:          if layer is not None:
503              color = self.choose_color()              color = self.choose_color()
504              if color is not None:              if color is not None:
505                  layer.SetFill(color)                  layer.GetClassification().SetDefaultFill(color)
506    
507      def LayerTransparentFill(self):      def LayerTransparentFill(self):
508          layer = self.current_layer()          layer = self.current_layer()
509          if layer is not None:          if layer is not None:
510              layer.SetFill(None)              layer.GetClassification().SetDefaultFill(Color.None)
511    
512      def LayerOutlineColor(self):      def LayerOutlineColor(self):
513          layer = self.current_layer()          layer = self.current_layer()
514          if layer is not None:          if layer is not None:
515              color = self.choose_color()              color = self.choose_color()
516              if color is not None:              if color is not None:
517                  layer.SetStroke(color)                  layer.GetClassification().SetDefaultLineColor(color)
518    
519      def LayerNoOutline(self):      def LayerNoOutline(self):
520          layer = self.current_layer()          layer = self.current_layer()
521          if layer is not None:          if layer is not None:
522              layer.SetStroke(None)              layer.GetClassification().SetDefaultLineColor(Color.None)
523    
524      def HideLayer(self):      def HideLayer(self):
525          layer = self.current_layer()          layer = self.current_layer()
# Line 348  class MainWindow(wxFrame): Line 534  class MainWindow(wxFrame):
534      def LayerShowTable(self):      def LayerShowTable(self):
535          layer = self.current_layer()          layer = self.current_layer()
536          if layer is not None:          if layer is not None:
537              tv = tableview.TableFrame(self, layer.table)              table = layer.table
538              tv.Show(true)              name = "table_view" + str(id(table))
539                dialog = self.get_open_dialog(name)
540                if dialog is None:
541                    dialog = tableview.LayerTableFrame(self, name,
542                                                   _("Table: %s") % layer.Title(),
543                                                       layer, table)
544                    self.add_dialog(name, dialog)
545                    dialog.Show(true)
546                else:
547                    # FIXME: bring dialog to front here
548                    pass
549    
550      def Projection(self):      def Projection(self):
551          map = self.canvas.Map()          map = self.canvas.Map()
552          proj = map.projection          proj = map.projection
553          if proj is None:          if proj is None:
554              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None, map.BoundingBox())
555          else:          else:
556              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params,
557                                                   map.BoundingBox())
558          if proj4Dlg.ShowModal() == wxID_OK:          if proj4Dlg.ShowModal() == wxID_OK:
559              params = proj4Dlg.GetParams()              params = proj4Dlg.GetParams()
560              if params is not None:              if params is not None:
# Line 367  class MainWindow(wxFrame): Line 564  class MainWindow(wxFrame):
564              map.SetProjection(proj)              map.SetProjection(proj)
565          proj4Dlg.Destroy()          proj4Dlg.Destroy()
566    
567        def Classify(self):
568    
569            #
570            # the menu option for this should only be available if there
571            # is a current layer, so we don't need to check if the
572            # current layer is None
573            #
574    
575            layer = self.current_layer()
576            self.OpenClassifier(layer)
577    
578        def OpenClassifier(self, layer):
579            name = "classifier" + str(id(layer))
580            dialog = self.get_open_dialog(name)
581    
582            if dialog is None:
583                dialog = classifier.Classifier(self, name, layer)
584                self.add_dialog(name, dialog)
585                dialog.Show()
586    
587    
588        def ShowLegend(self):
589            name = "legend"
590            dialog = self.get_open_dialog(name)
591    
592            if dialog is None:
593                dialog = legend.Legend(self, name, self.Map())
594                self.add_dialog(name, dialog)
595                dialog.Show()
596    
597      def ZoomInTool(self):      def ZoomInTool(self):
598          self.canvas.ZoomInTool()          self.canvas.ZoomInTool()
599    
# Line 377  class MainWindow(wxFrame): Line 604  class MainWindow(wxFrame):
604          self.canvas.PanTool()          self.canvas.PanTool()
605    
606      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)  
607          self.canvas.IdentifyTool()          self.canvas.IdentifyTool()
608            self.identify_view_on_demand(None, None)
609    
610      def LabelTool(self):      def LabelTool(self):
611          self.canvas.LabelTool()          self.canvas.LabelTool()
# Line 391  class MainWindow(wxFrame): Line 616  class MainWindow(wxFrame):
616      def PrintMap(self):      def PrintMap(self):
617          self.canvas.Print()          self.canvas.Print()
618    
619        def identify_view_on_demand(self, layer, shapes):
620            name = "identify_view"
621            if self.canvas.CurrentTool() == "IdentifyTool":
622                if not self.dialog_open(name):
623                    dialog = identifyview.IdentifyView(self, name)
624                    self.add_dialog(name, dialog)
625                    dialog.Show(true)
626                else:
627                    # FIXME: bring dialog to front?
628                    pass
629    
630  #  #
631  # Define all the commands available in the main window  # Define all the commands available in the main window
# Line 399  class MainWindow(wxFrame): Line 634  class MainWindow(wxFrame):
634    
635  # Helper functions to define common command implementations  # Helper functions to define common command implementations
636  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
637      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
638      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
639    
640  def _method_command(name, title, method, helptext = "", sensitive = None):  def _method_command(name, title, method, helptext = "",
641      """Add a command implemented by a method of the context object"""                      icon = "", sensitive = None):
642        """Add a command implemented by a method of the mainwindow object"""
643      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
644                           helptext = helptext, sensitive = sensitive))                           helptext = helptext, icon = icon,
645                             sensitive = sensitive))
646    
647    def make_check_current_tool(toolname):
648        """Return a function that tests if the currently active tool is toolname
649    
650        The returned function can be called with the context and returns
651        true iff the currently active tool's name is toolname. It's directly
652        usable as the 'checked' callback of a command.
653        """
654        def check_current_tool(context, name=toolname):
655            return context.mainwindow.canvas.CurrentTool() == name
656        return check_current_tool
657    
658  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
659                    icon = ""):                    icon = "", sensitive = None):
660      """Add a tool command"""      """Add a tool command"""
661      def check_current_tool(context, name=toolname):      registry.Add(ToolCommand(name, title, call_method, args=(method,),
662          return context.canvas.CurrentTool() == name                               helptext = helptext, icon = icon,
663      registry.Add(Command(name, title, call_method, args=(method,),                               checked = make_check_current_tool(toolname),
664                           helptext = helptext, icon = icon,                               sensitive = sensitive))
                          checked = check_current_tool))  
665    
666  def _has_selected_layer(context):  def _has_selected_layer(context):
667      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
668      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
669    
670    def _can_remove_layer(context):
671        return context.mainwindow.CanRemoveLayer()
672    
673    def _has_tree_window_shown(context):
674        """Return true if the tree window is shown"""
675        return context.mainwindow.get_open_dialog("session_tree") is None
676    
677    def _has_visible_map(context):
678        """Return true iff theres a visible map in the mainwindow.
679    
680        A visible map is a map with at least one visible layer."""
681        map = context.mainwindow.Map()
682        if map is not None:
683            for layer in map.Layers():
684                if layer.Visible():
685                    return 1
686        return 0
687    
688    def _has_legend_shown(context):
689        """Return true if the legend window is shown"""
690        return context.mainwindow.get_open_dialog("legend") is None
691    
692    
693  # File menu  # File menu
694  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", _("&New Session"), "NewSession")
695  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", _("&Open Session"), "OpenSession")
696  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", _("&Save Session"), "SaveSession")
697  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", _("Save Session &As"), "SaveSessionAs")
698  _method_command("exit", "&Exit", "Exit")  _method_command("show_session_tree", _("Show Session &Tree"), "ShowSessionTree",
699                    sensitive = _has_tree_window_shown)
700    _method_command("exit", _("E&xit"), "Exit")
701    
702  # Help menu  # Help menu
703  _method_command("help_about", "&About", "About")  _method_command("help_about", _("&About"), "About")
704    
705    
706  # Map menu  # Map menu
707  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", _("Pro&jection"), "Projection")
708    
709  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", _("&Zoom in"), "ZoomInTool", "ZoomInTool",
710                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = _("Switch to map-mode 'zoom-in'"), icon = "zoom_in",
711  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",                sensitive = _has_visible_map)
712                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")  _tool_command("map_zoom_out_tool", _("Zoom &out"), "ZoomOutTool", "ZoomOutTool",
713  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",                helptext = _("Switch to map-mode 'zoom-out'"), icon = "zoom_out",
714                helptext = "Switch to map-mode 'pan'", icon = "pan")                sensitive = _has_visible_map)
715  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_pan_tool", _("&Pan"), "PanTool", "PanTool",
716                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = _("Switch to map-mode 'pan'"), icon = "pan",
717  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",                sensitive = _has_visible_map)
718                helptext = "Add/Remove labels", icon = "label")  _tool_command("map_identify_tool", _("&Identify"), "IdentifyTool",
719  _method_command("map_full_extent", "&Full extent", "FullExtent")                "IdentifyTool",
720  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")                helptext = _("Switch to map-mode 'identify'"), icon = "identify",
721                  sensitive = _has_visible_map)
722    _tool_command("map_label_tool", _("&Label"), "LabelTool", "LabelTool",
723                  helptext = _("Add/Remove labels"), icon = "label",
724                  sensitive = _has_visible_map)
725    _method_command("map_full_extent", _("&Full extent"), "FullExtent",
726                   helptext = _("Full Extent"), icon = "fullextent",
727                  sensitive = _has_visible_map)
728    _method_command("map_print", _("Prin&t"), "PrintMap",
729                    helptext = _("Print the map"))
730    
731  # Layer menu  # Layer menu
732  _method_command("layer_add", "&Add", "AddLayer",  _method_command("layer_add", _("&Add Layer"), "AddLayer",
733                  helptext = "Add a new layer to active map")                  helptext = _("Add a new layer to active map"))
734  _method_command("layer_remove", "&Remove", "RemoveLayer",  _method_command("layer_remove", _("&Remove Layer"), "RemoveLayer",
735                  helptext = "Remove selected layer(s)",                  helptext = _("Remove selected layer(s)"),
736                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
737  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", _("&Fill Color"), "LayerFillColor",
738                  helptext = "Set the fill color of selected layer(s)",                  helptext = _("Set the fill color of selected layer(s)"),
739                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
740  _method_command("layer_transparent_fill", "&Transparent Fill",  _method_command("layer_transparent_fill", _("&Transparent Fill"),
741                  "LayerTransparentFill",                  "LayerTransparentFill",
742                  helptext = "Do not fill the selected layer(s)",                  helptext = _("Do not fill the selected layer(s)"),
743                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
744  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_outline_color", _("&Outline Color"), "LayerOutlineColor",
745                  helptext = "Set the outline color of selected layer(s)",                  helptext = _("Set the outline color of selected layer(s)"),
746                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
747  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_no_outline", _("&No Outline"), "LayerNoOutline",
748                  helptext = "Do not draw the outline of the selected layer(s)",                  helptext= _("Do not draw the outline of the selected layer(s)"),
749                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
750  _method_command("layer_raise", "&Raise", "RaiseLayer",  _method_command("layer_raise", _("&Raise"), "RaiseLayer",
751                  helptext = "Raise selected layer(s)",                  helptext = _("Raise selected layer(s)"),
752                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
753  _method_command("layer_lower", "&Lower", "LowerLayer",  _method_command("layer_lower", _("&Lower"), "LowerLayer",
754                  helptext = "Lower selected layer(s)",                  helptext = _("Lower selected layer(s)"),
755                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
756  _method_command("layer_show", "&Show", "ShowLayer",  _method_command("layer_show", _("&Show"), "ShowLayer",
757                  helptext = "Make selected layer(s) visible",                  helptext = _("Make selected layer(s) visible"),
758                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
759  _method_command("layer_hide", "&Hide", "HideLayer",  _method_command("layer_hide", _("&Hide"), "HideLayer",
760                  helptext = "Make selected layer(s) unvisible",                  helptext = _("Make selected layer(s) unvisible"),
761                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
762  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  _method_command("layer_show_table", _("Show Ta&ble"), "LayerShowTable",
763                  helptext = "Show the selected layer's table",                  helptext = _("Show the selected layer's table"),
764                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
765    _method_command("layer_classifier", _("Classify"), "Classify",
766                    sensitive = _has_selected_layer)
767    _method_command("show_legend", _("Legend"), "ShowLegend",
768                    sensitive = _has_legend_shown)
769    
770    # the menu structure
771    main_menu = Menu("<main>", "<main>",
772                     [Menu("file", _("&File"),
773                           ["new_session", "open_session", None,
774                            "save_session", "save_session_as", None,
775                            "show_session_tree", None,
776                            "show_legend", None,
777                            "exit"]),
778                      Menu("map", _("&Map"),
779                           ["layer_add", "layer_remove",
780                            None,
781                            "map_projection",
782                            None,
783                            "map_zoom_in_tool", "map_zoom_out_tool",
784                            "map_pan_tool", "map_identify_tool", "map_label_tool",
785                            None,
786                            "map_full_extent",
787                            None,
788                            "map_print"]),
789                      Menu("layer", _("&Layer"),
790                           ["layer_fill_color", "layer_transparent_fill",
791                            "layer_outline_color", "layer_no_outline",
792                            None,
793                            "layer_raise", "layer_lower",
794                            None,
795                            "layer_show", "layer_hide",
796                            None,
797                            "layer_show_table",
798                            None,
799                            "layer_classifier"]),
800                      Menu("help", _("&Help"),
801                           ["help_about"])])
802    
803    # the main toolbar
804    
805    main_toolbar = Menu("<toolbar>", "<toolbar>",
806                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
807                         "map_full_extent", None,
808                         "map_identify_tool", "map_label_tool"])
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