/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 102 by jan, Fri Apr 19 14:22:25 2002 UTC revision 633 by jonathan, Wed Apr 9 10:11:07 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, create_empty_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, DOCKABLE_DOCKED, DOCKABLE_UNDOCKED, DOCKABLE_CLOSED
40    
41  import main  from Thuban.UI.dock import DockableWindow, DockFrame, DockPanel
 from command import registry, Command  
 from messages import SELECTED_SHAPE  
42    
43    
44  # the directory where the toolbar icons are stored  # the directory where the toolbar icons are stored
45  bitmapdir = os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Bitmaps")  bitmapdir = os.path.join(Thuban.__path__[0], os.pardir, "Resources", "Bitmaps")
46  bitmapext = ".xpm"  bitmapext = ".xpm"
47    
48    ID_WINDOW_LEGEND = 4001
49    ID_WINDOW_CANVAS = 4002
50    
51    
52  class MainWindow(wxFrame):  class MainWindow(DockFrame):
53    
54      def __init__(self, parent, ID, interactor):      # Some messages that can be subscribed/unsubscribed directly through
55          wxFrame.__init__(self, parent, ID, 'Thuban',      # the MapCanvas come in fact from other objects. This is a map to
56                           wxDefaultPosition, wxSize(400, 300))      # map those messages to the names of the instance variables they
57        # actually come from. This delegation is implemented in the
58        # Subscribe and unsubscribed methods
59        delegated_messages = {LAYER_SELECTED: "canvas",
60                              SHAPES_SELECTED: "canvas"}
61    
62        # Methods delegated to some instance variables. The delegation is
63        # implemented in the __getattr__ method.
64        delegated_methods = {"SelectLayer": "canvas",
65                             "SelectShapes": "canvas",
66                             }
67    
68        def __init__(self, parent, ID, title, application, interactor,
69                     initial_message = None, size = wxSize(-1, -1)):
70            DockFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
71            #wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
72    
73          self.interactor = interactor          self.application = application
74    
75          self.CreateStatusBar()          self.CreateStatusBar()
76          self.SetStatusText("This is the wxPython-based "          if initial_message:
77                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
78    
79          self.identify_view = None          self.identify_view = None
80    
81          self.init_ids()          self.init_ids()
82    
83          menuBar = wxMenuBar()          # creat the menubar from the main_menu description
84            self.SetMenuBar(self.build_menu_bar(main_menu))
         menu = wxMenu()  
         menuBar.Append(menu, "&File");  
         for name in ["new_session", "open_session", None,  
                      "save_session", "save_session_as", None,  
                      "exit"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Map");  
         for name in ["layer_add", "layer_remove",  
                      None,  
                      "map_projection",  
                      None,  
                      "map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool",  
                      None,  
                      "map_full_extent",  
                      None,  
                      "map_print"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Layer");  
         for name in ["layer_fill_color", "layer_transparent_fill",  
                      "layer_ourline_color", "layer_no_outline",  
                      None,  
                      "layer_raise", "layer_lower",  
                      None,  
                      "layer_show", "layer_hide",  
                      None,  
                      "layer_show_table"]:  
             self.add_menu_command(menu, name)  
   
         menu = wxMenu()  
         menuBar.Append(menu, "&Help");  
         self.add_menu_command(menu, "help_about")  
   
         self.SetMenuBar(menuBar)  
   
         # toolbar  
         toolbar = self.CreateToolBar(wxTB_3DBUTTONS)  
85    
86          # set the size of the tools' bitmaps. Not needed on wxGTK, but          # Similarly, create the toolbar from main_toolbar
87          # on Windows. We probably shouldn't hardwire the bitmap size          toolbar = self.build_toolbar(main_toolbar)
         # here  
         toolbar.SetToolBitmapSize(wxSize(24, 24))  
   
         for name in ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool"]:  
             self.add_toolbar_command(toolbar, name)  
88          # call Realize to make sure that the tools appear.          # call Realize to make sure that the tools appear.
89          toolbar.Realize()          toolbar.Realize()
90    
91    
92          # Create the map canvas          # Create the map canvas
93          canvas = view.MapCanvas(self, -1, interactor)          canvas = view.MapCanvas(self, -1)
94            canvas.Subscribe(VIEW_POSITION, self.view_position_changed)
95            canvas.Subscribe(SHAPES_SELECTED, self.identify_view_on_demand)
96          self.canvas = canvas          self.canvas = canvas
97    
98            self.SetMainWindow(self.canvas)
99    
100            self.SetAutoLayout(True)
101    
102          self.init_dialogs()          self.init_dialogs()
103    
104          interactor.Subscribe(SELECTED_SHAPE, self.identify_view_on_demand)          EVT_CLOSE(self, self._OnClose)
105    
106        def Subscribe(self, channel, *args):
107            """Subscribe a function to a message channel.
108    
109            If channel is one of the delegated messages call the appropriate
110            object's Subscribe method. Otherwise do nothing.
111            """
112            if channel in self.delegated_messages:
113                object = getattr(self, self.delegated_messages[channel])
114                object.Subscribe(channel, *args)
115            else:
116                print "Trying to subscribe to unsupported channel %s" % channel
117    
118          EVT_CLOSE(self, self.OnClose)      def Unsubscribe(self, channel, *args):
119            """Unsubscribe a function from a message channel.
120    
121            If channel is one of the delegated messages call the appropriate
122            object's Unsubscribe method. Otherwise do nothing.
123            """
124            if channel in self.delegated_messages:
125                object = getattr(self, self.delegated_messages[channel])
126                object.Unsubscribe(channel, *args)
127    
128        def __getattr__(self, attr):
129            """If attr is one of the delegated methods return that method
130    
131            Otherwise raise AttributeError.
132            """
133            if attr in self.delegated_methods:
134                return getattr(getattr(self, self.delegated_methods[attr]), attr)
135            raise AttributeError(attr)
136    
137      def init_ids(self):      def init_ids(self):
138          """Initialize the ids"""          """Initialize the ids"""
139          self.current_id = 6000          self.current_id = 6000
140          self.id_to_name = {}          self.id_to_name = {}
141          self.name_to_id = {}          self.name_to_id = {}
142            self.events_bound = {}
143    
144      def get_id(self, name):      def get_id(self, name):
145          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 136  class MainWindow(wxFrame): Line 152  class MainWindow(wxFrame):
152              self.name_to_id[name] = ID              self.name_to_id[name] = ID
153              self.id_to_name[ID] = name              self.id_to_name[ID] = name
154          return ID          return ID
155            
156        def bind_command_events(self, command, ID):
157            """Bind the necessary events for the given command and ID"""
158            if not self.events_bound.has_key(ID):
159                # the events haven't been bound yet
160                EVT_MENU(self, ID, self.invoke_command)
161                if command.IsDynamic():
162                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
163    
164        def build_menu_bar(self, menudesc):
165            """Build and return the menu bar from the menu description"""
166            menu_bar = wxMenuBar()
167    
168            for item in menudesc.items:
169                # here the items must all be Menu instances themselves
170                menu_bar.Append(self.build_menu(item), item.title)
171    
172            return menu_bar
173    
174        def build_menu(self, menudesc):
175            """Return a wxMenu built from the menu description menudesc"""
176            wxmenu = wxMenu()
177            last = None
178            for item in menudesc.items:
179                if item is None:
180                    # a separator. Only add one if the last item was not a
181                    # separator
182                    if last is not None:
183                        wxmenu.AppendSeparator()
184                elif isinstance(item, Menu):
185                    # a submenu
186                    wxmenu.AppendMenu(wxNewId(), item.title, self.build_menu(item))
187                else:
188                    # must the name the name of a command
189                    self.add_menu_command(wxmenu, item)
190                last = item
191            return wxmenu
192    
193        def build_toolbar(self, toolbardesc):
194            """Build and return the main toolbar window from a toolbar description
195    
196            The parameter should be an instance of the Menu class but it
197            should not contain submenus.
198            """
199            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
200    
201            # set the size of the tools' bitmaps. Not needed on wxGTK, but
202            # on Windows, although it doesn't work very well there. It seems
203            # that only 16x16 icons are really supported on windows.
204            # We probably shouldn't hardwire the bitmap size here.
205            toolbar.SetToolBitmapSize(wxSize(24, 24))
206    
207            for item in toolbardesc.items:
208                if item is None:
209                    toolbar.AddSeparator()
210                else:
211                    # assume it's a string.
212                    self.add_toolbar_command(toolbar, item)
213    
214            return toolbar
215    
216      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
217          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
218    
# Line 150  class MainWindow(wxFrame): Line 226  class MainWindow(wxFrame):
226                  ID = self.get_id(name)                  ID = self.get_id(name)
227                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
228                              command.IsCheckCommand())                              command.IsCheckCommand())
229                  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)  
230              else:              else:
231                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
232    
233      def add_toolbar_command(self, toolbar, name):      def add_toolbar_command(self, toolbar, name):
234          """Add the command with name name to the toolbar toolbar.          """Add the command with name name to the toolbar toolbar.
# Line 174  class MainWindow(wxFrame): Line 248  class MainWindow(wxFrame):
248                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
249                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
250                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
251                    self.bind_command_events(command, ID)
252              else:              else:
253                  print "Unknown command %s" % name                  print _("Unknown command %s") % name
254    
255        def Context(self):
256            """Return the context object for a command invoked from this window
257            """
258            return Context(self.application, self.application.Session(), self)
259    
260      def invoke_command(self, event):      def invoke_command(self, event):
261          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
262          if name is not None:          if name is not None:
263              command = registry.Command(name)              command = registry.Command(name)
264              command.Execute(self)              command.Execute(self.Context())
265          else:          else:
266              print "Unknown command ID %d" % event.GetId()              print _("Unknown command ID %d") % event.GetId()
267    
268      def update_command_ui(self, event):      def update_command_ui(self, event):
269          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
270            context = self.Context()
271          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
272          if command is not None:          if command is not None:
273              event.Enable(command.Sensitive(self))              sensitive = command.Sensitive(context)
274              event.SetText(command.DynText(self))              event.Enable(sensitive)
275                if command.IsTool() and not sensitive and command.Checked(context):
276                    # When a checked tool command is disabled deselect all
277                    # tools. Otherwise the tool would remain active but it
278                    # might lead to errors if the tools stays active. This
279                    # problem occurred in GREAT-ER and this fixes it, but
280                    # it's not clear to me whether this is really the best
281                    # way to do it (BH, 20021206).
282                    self.canvas.SelectTool(None)
283                event.SetText(command.DynText(context))
284              if command.IsCheckCommand():              if command.IsCheckCommand():
285                  event.Check(command.Checked(self))                      event.Check(command.Checked(context))
286    
287      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
288          """Run a modla message box with the given text, title and flags          """Run a modal message box with the given text, title and flags
289          and return the result"""          and return the result"""
290          dlg = wxMessageDialog(self, text, title, flags)          dlg = wxMessageDialog(self, text, title, flags)
291            dlg.CenterOnParent()
292          result = dlg.ShowModal()          result = dlg.ShowModal()
293          dlg.Destroy()          dlg.Destroy()
294          return result          return result
# Line 211  class MainWindow(wxFrame): Line 302  class MainWindow(wxFrame):
302    
303      def add_dialog(self, name, dialog):      def add_dialog(self, name, dialog):
304          if self.dialogs.has_key(name):          if self.dialogs.has_key(name):
305              raise RuntimeError("The Dialog named %s is already open" % name)              raise RuntimeError(_("The Dialog named %s is already open") % name)
306          self.dialogs[name] = dialog          self.dialogs[name] = dialog
307    
308      def dialog_open(self, name):      def dialog_open(self, name):
# Line 223  class MainWindow(wxFrame): Line 314  class MainWindow(wxFrame):
314      def get_open_dialog(self, name):      def get_open_dialog(self, name):
315          return self.dialogs.get(name)          return self.dialogs.get(name)
316    
317        def view_position_changed(self):
318            pos = self.canvas.CurrentPosition()
319            if pos is not None:
320                text = "(%10.10g, %10.10g)" % pos
321            else:
322                text = ""
323            self.set_position_text(text)
324    
325        def set_position_text(self, text):
326            """Set the statusbar text showing the current position.
327    
328            By default the text is shown in field 0 of the status bar.
329            Override this method in derived classes to put it into a
330            different field of the statusbar.
331            """
332            self.SetStatusText(text)
333    
334      def save_modified_session(self, can_veto = 1):      def save_modified_session(self, can_veto = 1):
335          """If the current session has been modified, ask the user          """If the current session has been modified, ask the user
336          whether to save it and do so if requested. Return the outcome of          whether to save it and do so if requested. Return the outcome of
# Line 232  class MainWindow(wxFrame): Line 340  class MainWindow(wxFrame):
340          If the can_veto parameter is true (default) the dialog includes          If the can_veto parameter is true (default) the dialog includes
341          a cancel button, otherwise not.          a cancel button, otherwise not.
342          """          """
343          if main.app.session.WasModified():          if self.application.session.WasModified():
344              flags = wxYES_NO | wxICON_QUESTION              flags = wxYES_NO | wxICON_QUESTION
345              if can_veto:              if can_veto:
346                  flags = flags | wxCANCEL                  flags = flags | wxCANCEL
347              result = self.RunMessageBox("Exit",              result = self.RunMessageBox(_("Exit"),
348                                          ("The session has been modified."                                          _("The session has been modified."
349                                           " Do you want to save it?"),                                           " Do you want to save it?"),
350                                          flags)                                          flags)
351              if result == wxID_YES:              if result == wxID_YES:
# Line 246  class MainWindow(wxFrame): Line 354  class MainWindow(wxFrame):
354              result = wxID_NO              result = wxID_NO
355          return result          return result
356    
357        def prepare_new_session(self):
358            for d in self.dialogs.values():
359                if not isinstance(d, tree.SessionTreeView):
360                    d.Close()
361    
362      def NewSession(self):      def NewSession(self):
363          self.save_modified_session()          self.save_modified_session()
364          main.app.SetSession(create_empty_session())          self.prepare_new_session()
365            self.application.SetSession(create_empty_session())
366    
367      def OpenSession(self):      def OpenSession(self):
368          self.save_modified_session()          self.save_modified_session()
369          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, _("Open Session"), ".", "", "*.thuban", wxOPEN)
                            "*.session", wxOPEN)  
370          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
371              main.app.OpenSession(dlg.GetPath())              self.prepare_new_session()
372                self.application.OpenSession(dlg.GetPath())
373          dlg.Destroy()          dlg.Destroy()
374    
375      def SaveSession(self):      def SaveSession(self):
376          if main.app.session.filename == None:          if self.application.session.filename == None:
377              self.SaveSessionAs()              self.SaveSessionAs()
378          main.app.SaveSession()          else:
379                self.application.SaveSession()
380    
381      def SaveSessionAs(self):      def SaveSessionAs(self):
382          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, _("Save Session As"), ".", "",
383                             "*.session", wxOPEN)                             "*.thuban", wxOPEN)
384          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
385              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
386              main.app.SaveSession()              self.application.SaveSession()
387          dlg.Destroy()          dlg.Destroy()
388    
389      def Exit(self):      def Exit(self):
390          self.Close(false)          self.Close(False)
391    
392      def OnClose(self, event):      def _OnClose(self, event):
393          result = self.save_modified_session(can_veto = event.CanVeto())          result = self.save_modified_session(can_veto = event.CanVeto())
394          if result == wxID_CANCEL:          if result == wxID_CANCEL:
395              event.Veto()              event.Veto()
396          else:          else:
397                # FIXME: it would be better to tie the unsubscription to
398                # wx's destroy event, but that isn't implemented for wxGTK
399                # yet.
400                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
401                DockFrame._OnClose(self, event)
402              self.Destroy()              self.Destroy()
403    
404      def SetMap(self, map):      def SetMap(self, map):
405          self.canvas.SetMap(map)          self.canvas.SetMap(map)
406            #self.legendPanel.SetMap(map)
407    
408        def Map(self):
409            """Return the map displayed by this mainwindow"""
410    
411            # sanity check
412            #assert(self.canvas.Map() is self.legendPanel.GetMap())
413    
414      def ShowSessionTree(self):          return self.canvas.Map()
415    
416        def ToggleSessionTree(self):
417            """If the session tree is shown close it otherwise create a new tree"""
418          name = "session_tree"          name = "session_tree"
419          dialog = self.get_open_dialog(name)          dialog = self.get_open_dialog(name)
420          if dialog is None:          if dialog is None:
421              dialog = tree.SessionTreeView(self, main.app, name)              dialog = tree.SessionTreeView(self, self.application, name)
422              self.add_dialog(name, dialog)              self.add_dialog(name, dialog)
423              dialog.Show(true)              dialog.Show(True)
424          else:          else:
425              # FIXME: bring dialog to front here              dialog.Close()
426              pass  
427        def SessionTreeShown(self):
428            """Return true iff the session tree is currently shown"""
429            return self.get_open_dialog("session_tree") is not None
430    
431      def About(self):      def About(self):
432          self.RunMessageBox("About",          self.RunMessageBox(_("About"),
433                             ("Thuban is a program for\n"                             _("Thuban v%s\n"
434                                #"Build Date: %s\n"
435                                "\n"
436                                "Thuban is a program for\n"
437                              "exploring geographic data.\n"                              "exploring geographic data.\n"
438                              "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001-2003 Intevation GmbH.\n"
439                              "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GNU GPL"
440                               % __ThubanVersion__), #__BuildDate__)),
441                             wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
442    
443      def AddLayer(self):      def AddLayer(self):
444          dlg = wxFileDialog(self, "Select a session file", ".", "", "*.*",          dlg = wxFileDialog(self, _("Select a data file"), ".", "", "*.*",
445                             wxOPEN)                             wxOPEN)
446          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
447              filename = dlg.GetPath()              filename = dlg.GetPath()
# Line 316  class MainWindow(wxFrame): Line 453  class MainWindow(wxFrame):
453                  map.AddLayer(layer)                  map.AddLayer(layer)
454              except IOError:              except IOError:
455                  # the layer couldn't be opened                  # the layer couldn't be opened
456                  self.RunMessageBox("Add Layer",                  self.RunMessageBox(_("Add Layer"),
457                                     "Can't open the file '%s'." % filename)                                     _("Can't open the file '%s'.") % filename)
458              else:              else:
459                  if not has_layers:                  if not has_layers:
460                      # if we're adding a layer to an empty map, for the                      # if we're adding a layer to an empty map, fit the
461                      # new map to the window                      # new map to the window
462                      self.canvas.FitMapToWindow()                      self.canvas.FitMapToWindow()
463          dlg.Destroy()          dlg.Destroy()
# Line 330  class MainWindow(wxFrame): Line 467  class MainWindow(wxFrame):
467          if layer is not None:          if layer is not None:
468              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
469    
470        def CanRemoveLayer(self):
471            """Return true if the currently selected layer can be deleted.
472    
473            If no layer is selected return False.
474    
475            The return value of this method determines whether the remove
476            layer command is sensitive in menu.
477            """
478            layer = self.current_layer()
479            if layer is not None:
480                return self.canvas.Map().CanRemoveLayer(layer)
481            return False
482    
483      def RaiseLayer(self):      def RaiseLayer(self):
484          layer = self.current_layer()          layer = self.current_layer()
485          if layer is not None:          if layer is not None:
486              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
487            
488      def LowerLayer(self):      def LowerLayer(self):
489          layer = self.current_layer()          layer = self.current_layer()
490          if layer is not None:          if layer is not None:
# Line 345  class MainWindow(wxFrame): Line 495  class MainWindow(wxFrame):
495    
496          If no layer is selected, return None          If no layer is selected, return None
497          """          """
498          return self.interactor.SelectedLayer()          return self.canvas.SelectedLayer()
499    
500      def has_selected_layer(self):      def has_selected_layer(self):
501          """Return true if a layer is currently selected"""          """Return true if a layer is currently selected"""
502          return self.interactor.HasSelectedLayer()          return self.canvas.HasSelectedLayer()
503    
504      def choose_color(self):      def choose_color(self):
505          """Run the color selection dialog and return the selected color.          """Run the color selection dialog and return the selected color.
# Line 372  class MainWindow(wxFrame): Line 522  class MainWindow(wxFrame):
522          if layer is not None:          if layer is not None:
523              color = self.choose_color()              color = self.choose_color()
524              if color is not None:              if color is not None:
525                  layer.SetFill(color)                  layer.GetClassification().SetDefaultFill(color)
526    
527      def LayerTransparentFill(self):      def LayerTransparentFill(self):
528          layer = self.current_layer()          layer = self.current_layer()
529          if layer is not None:          if layer is not None:
530              layer.SetFill(None)              layer.GetClassification().SetDefaultFill(Color.Transparent)
531    
532      def LayerOutlineColor(self):      def LayerOutlineColor(self):
533          layer = self.current_layer()          layer = self.current_layer()
534          if layer is not None:          if layer is not None:
535              color = self.choose_color()              color = self.choose_color()
536              if color is not None:              if color is not None:
537                  layer.SetStroke(color)                  layer.GetClassification().SetDefaultLineColor(color)
538    
539      def LayerNoOutline(self):      def LayerNoOutline(self):
540          layer = self.current_layer()          layer = self.current_layer()
541          if layer is not None:          if layer is not None:
542              layer.SetStroke(None)              layer.GetClassification().SetDefaultLineColor(Color.Transparent)
543    
544      def HideLayer(self):      def HideLayer(self):
545          layer = self.current_layer()          layer = self.current_layer()
# Line 408  class MainWindow(wxFrame): Line 558  class MainWindow(wxFrame):
558              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
559              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
560              if dialog is None:              if dialog is None:
561                  dialog = tableview.TableFrame(self, self.interactor, name,                  dialog = tableview.LayerTableFrame(self, name,
562                                                "Table: %s" % layer.Title(),                                                 _("Table: %s") % layer.Title(),
563                                                layer, table)                                                     layer, table)
564                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
565                  dialog.Show(true)                  dialog.Show(true)
566              else:              else:
# Line 421  class MainWindow(wxFrame): Line 571  class MainWindow(wxFrame):
571          map = self.canvas.Map()          map = self.canvas.Map()
572          proj = map.projection          proj = map.projection
573          if proj is None:          if proj is None:
574              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, None, map.BoundingBox())
575          else:          else:
576              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params)              proj4Dlg = proj4dialog.Proj4Dialog(NULL, map.projection.params,
577                                                   map.BoundingBox())
578          if proj4Dlg.ShowModal() == wxID_OK:          if proj4Dlg.ShowModal() == wxID_OK:
579              params = proj4Dlg.GetParams()              params = proj4Dlg.GetParams()
580              if params is not None:              if params is not None:
# Line 433  class MainWindow(wxFrame): Line 584  class MainWindow(wxFrame):
584              map.SetProjection(proj)              map.SetProjection(proj)
585          proj4Dlg.Destroy()          proj4Dlg.Destroy()
586    
587        def Classify(self):
588    
589            #
590            # the menu option for this should only be available if there
591            # is a current layer, so we don't need to check if the
592            # current layer is None
593            #
594    
595            layer = self.current_layer()
596            self.OpenClassifier(layer)
597    
598        def OpenClassifier(self, layer, group = None):
599            name = "classifier" + str(id(layer))
600            dialog = self.get_open_dialog(name)
601    
602            if dialog is None:
603                dialog = Classifier(self, name, layer, group)
604                self.add_dialog(name, dialog)
605                dialog.Show()
606            dialog.Raise()
607    
608    
609        def ShowLegend(self):
610            if not self.LegendShown():
611                self.ToggleLegend()
612    
613        def ToggleLegend(self):
614            """Show the legend if it's not shown otherwise hide it again"""
615            name = "legend"
616            dialog = self.FindRegisteredDock(name)
617    
618            if dialog is None:
619                title = "Legend: %s" % self.Map().Title()
620                dialog = self.CreateDock(name, -1, title, wxLAYOUT_LEFT)
621                legend.LegendPanel(dialog, None, self)
622                dialog.Dock()
623                dialog.GetPanel().SetMap(self.Map())
624                dialog.Show()
625            else:
626                dialog.Show(not dialog.IsShown())
627    
628        def LegendShown(self):
629            """Return true iff the legend is currently open"""
630            dialog = self.FindRegisteredDock("legend")
631            return dialog is not None and dialog.IsShown()
632    
633      def ZoomInTool(self):      def ZoomInTool(self):
634          self.canvas.ZoomInTool()          self.canvas.ZoomInTool()
635    
# Line 455  class MainWindow(wxFrame): Line 652  class MainWindow(wxFrame):
652      def PrintMap(self):      def PrintMap(self):
653          self.canvas.Print()          self.canvas.Print()
654    
655      def identify_view_on_demand(self, layer, shape):      def identify_view_on_demand(self, layer, shapes):
656          name = "identify_view"          name = "identify_view"
657          if self.canvas.CurrentTool() == "IdentifyTool":          if self.canvas.CurrentTool() == "IdentifyTool":
658              if not self.dialog_open(name):              if not self.dialog_open(name):
659                  dialog = identifyview.IdentifyView(self, self.interactor, name)                  dialog = identifyview.IdentifyView(self, name)
660                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
661                  dialog.Show(true)                  dialog.Show(True)
662              else:              else:
663                  # FIXME: bring dialog to front?                  # FIXME: bring dialog to front?
664                  pass                  pass
# Line 473  class MainWindow(wxFrame): Line 670  class MainWindow(wxFrame):
670    
671  # Helper functions to define common command implementations  # Helper functions to define common command implementations
672  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
673      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
674      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
675    
676  def _method_command(name, title, method, helptext = "", sensitive = None):  def _method_command(name, title, method, helptext = "",
677      """Add a command implemented by a method of the context object"""                      icon = "", sensitive = None, checked = None):
678        """Add a command implemented by a method of the mainwindow object"""
679      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
680                           helptext = helptext, sensitive = sensitive))                           helptext = helptext, icon = icon,
681                             sensitive = sensitive, checked = checked))
682    
683    def make_check_current_tool(toolname):
684        """Return a function that tests if the currently active tool is toolname
685    
686        The returned function can be called with the context and returns
687        true iff the currently active tool's name is toolname. It's directly
688        usable as the 'checked' callback of a command.
689        """
690        def check_current_tool(context, name=toolname):
691            return context.mainwindow.canvas.CurrentTool() == name
692        return check_current_tool
693    
694  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
695                    icon = ""):                    icon = "", sensitive = None):
696      """Add a tool command"""      """Add a tool command"""
697      def check_current_tool(context, name=toolname):      registry.Add(ToolCommand(name, title, call_method, args=(method,),
698          return context.canvas.CurrentTool() == name                               helptext = helptext, icon = icon,
699      registry.Add(Command(name, title, call_method, args=(method,),                               checked = make_check_current_tool(toolname),
700                           helptext = helptext, icon = icon,                               sensitive = sensitive))
                          checked = check_current_tool))  
701    
702  def _has_selected_layer(context):  def _has_selected_layer(context):
703      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
704      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
705    
706    def _can_remove_layer(context):
707        return context.mainwindow.CanRemoveLayer()
708    
709    def _has_tree_window_shown(context):
710        """Return true if the tree window is shown"""
711        return context.mainwindow.SessionTreeShown()
712    
713    def _has_visible_map(context):
714        """Return true iff theres a visible map in the mainwindow.
715    
716        A visible map is a map with at least one visible layer."""
717        map = context.mainwindow.Map()
718        if map is not None:
719            for layer in map.Layers():
720                if layer.Visible():
721                    return 1
722        return 0
723    
724    def _has_legend_shown(context):
725        """Return true if the legend window is shown"""
726        return context.mainwindow.LegendShown()
727    
728    
729  # File menu  # File menu
730  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", _("&New Session"), "NewSession")
731  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", _("&Open Session"), "OpenSession")
732  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", _("&Save Session"), "SaveSession")
733  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", _("Save Session &As"), "SaveSessionAs")
734  _method_command("exit", "&Exit", "Exit")  _method_command("toggle_session_tree", _("Session &Tree"), "ToggleSessionTree",
735                    checked = _has_tree_window_shown)
736    _method_command("toggle_legend", _("Legend"), "ToggleLegend",
737                    checked = _has_legend_shown)
738    _method_command("exit", _("E&xit"), "Exit")
739    
740  # Help menu  # Help menu
741  _method_command("help_about", "&About", "About")  _method_command("help_about", _("&About"), "About")
742    
743    
744  # Map menu  # Map menu
745  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", _("Pro&jection"), "Projection")
746    
747  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", _("&Zoom in"), "ZoomInTool", "ZoomInTool",
748                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = _("Switch to map-mode 'zoom-in'"), icon = "zoom_in",
749  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",                sensitive = _has_visible_map)
750                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")  _tool_command("map_zoom_out_tool", _("Zoom &out"), "ZoomOutTool", "ZoomOutTool",
751  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",                helptext = _("Switch to map-mode 'zoom-out'"), icon = "zoom_out",
752                helptext = "Switch to map-mode 'pan'", icon = "pan")                sensitive = _has_visible_map)
753  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_pan_tool", _("&Pan"), "PanTool", "PanTool",
754                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = _("Switch to map-mode 'pan'"), icon = "pan",
755  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",                sensitive = _has_visible_map)
756                helptext = "Add/Remove labels", icon = "label")  _tool_command("map_identify_tool", _("&Identify"), "IdentifyTool",
757  _method_command("map_full_extent", "&Full extent", "FullExtent")                "IdentifyTool",
758  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")                helptext = _("Switch to map-mode 'identify'"), icon = "identify",
759                  sensitive = _has_visible_map)
760    _tool_command("map_label_tool", _("&Label"), "LabelTool", "LabelTool",
761                  helptext = _("Add/Remove labels"), icon = "label",
762                  sensitive = _has_visible_map)
763    _method_command("map_full_extent", _("&Full extent"), "FullExtent",
764                   helptext = _("Full Extent"), icon = "fullextent",
765                  sensitive = _has_visible_map)
766    _method_command("map_print", _("Prin&t"), "PrintMap",
767                    helptext = _("Print the map"))
768    
769  # Layer menu  # Layer menu
770  _method_command("layer_add", "&Add Layer", "AddLayer",  _method_command("layer_add", _("&Add Layer"), "AddLayer",
771                  helptext = "Add a new layer to active map")                  helptext = _("Add a new layer to active map"))
772  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",  _method_command("layer_remove", _("&Remove Layer"), "RemoveLayer",
773                  helptext = "Remove selected layer(s)",                  helptext = _("Remove selected layer(s)"),
774                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
775  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", _("&Fill Color"), "LayerFillColor",
776                  helptext = "Set the fill color of selected layer(s)",                  helptext = _("Set the fill color of selected layer(s)"),
777                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
778  _method_command("layer_transparent_fill", "&Transparent Fill",  _method_command("layer_transparent_fill", _("&Transparent Fill"),
779                  "LayerTransparentFill",                  "LayerTransparentFill",
780                  helptext = "Do not fill the selected layer(s)",                  helptext = _("Do not fill the selected layer(s)"),
781                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
782  _method_command("layer_ourline_color", "&Outline Color", "LayerOutlineColor",  _method_command("layer_outline_color", _("&Outline Color"), "LayerOutlineColor",
783                  helptext = "Set the outline color of selected layer(s)",                  helptext = _("Set the outline color of selected layer(s)"),
784                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
785  _method_command("layer_no_outline", "&No Outline", "LayerNoOutline",  _method_command("layer_no_outline", _("&No Outline"), "LayerNoOutline",
786                  helptext = "Do not draw the outline of the selected layer(s)",                  helptext= _("Do not draw the outline of the selected layer(s)"),
787                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
788  _method_command("layer_raise", "&Raise", "RaiseLayer",  _method_command("layer_raise", _("&Raise"), "RaiseLayer",
789                  helptext = "Raise selected layer(s)",                  helptext = _("Raise selected layer(s)"),
790                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
791  _method_command("layer_lower", "&Lower", "LowerLayer",  _method_command("layer_lower", _("&Lower"), "LowerLayer",
792                  helptext = "Lower selected layer(s)",                  helptext = _("Lower selected layer(s)"),
793                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
794  _method_command("layer_show", "&Show", "ShowLayer",  _method_command("layer_show", _("&Show"), "ShowLayer",
795                  helptext = "Make selected layer(s) visible",                  helptext = _("Make selected layer(s) visible"),
796                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
797  _method_command("layer_hide", "&Hide", "HideLayer",  _method_command("layer_hide", _("&Hide"), "HideLayer",
798                  helptext = "Make selected layer(s) unvisible",                  helptext = _("Make selected layer(s) unvisible"),
799                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
800  _method_command("layer_show_table", "Show Ta&ble", "LayerShowTable",  _method_command("layer_show_table", _("Show Ta&ble"), "LayerShowTable",
801                  helptext = "Show the selected layer's table",                  helptext = _("Show the selected layer's table"),
802                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
803    _method_command("layer_classifier", _("Classify"), "Classify",
804                    sensitive = _has_selected_layer)
805    
806    # the menu structure
807    main_menu = Menu("<main>", "<main>",
808                     [Menu("file", _("&File"),
809                           ["new_session", "open_session", None,
810                            "save_session", "save_session_as", None,
811                            "toggle_session_tree", None,
812                            "exit"]),
813                      Menu("map", _("&Map"),
814                           ["layer_add", "layer_remove",
815                            None,
816                            "map_projection",
817                            None,
818                            "map_zoom_in_tool", "map_zoom_out_tool",
819                            "map_pan_tool", "map_identify_tool", "map_label_tool",
820                            None,
821                            "map_full_extent",
822                            None,
823                            "toggle_legend",
824                            None,
825                            "map_print"]),
826                      Menu("layer", _("&Layer"),
827                           ["layer_fill_color", "layer_transparent_fill",
828                            "layer_outline_color", "layer_no_outline",
829                            None,
830                            "layer_raise", "layer_lower",
831                            None,
832                            "layer_show", "layer_hide",
833                            None,
834                            "layer_show_table",
835                            None,
836                            "layer_classifier"]),
837                      Menu("help", _("&Help"),
838                           ["help_about"])])
839    
840    # the main toolbar
841    
842    main_toolbar = Menu("<toolbar>", "<toolbar>",
843                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
844                         "map_full_extent", None,
845                         "map_identify_tool", "map_label_tool"])
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