/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 188 by bh, Tue May 28 12:38:45 2002 UTC revision 314 by bh, Wed Sep 11 15:18:09 2002 UTC
# Line 28  import proj4dialog Line 28  import proj4dialog
28  import tableview, identifyview  import tableview, identifyview
29  from menu import Menu  from menu import Menu
30    
31  import main  from context import Context
32  from command import registry, Command  from command import registry, Command
33  from messages import SELECTED_SHAPE, VIEW_POSITION  from messages import SELECTED_SHAPE, VIEW_POSITION
34    
# Line 40  bitmapext = ".xpm" Line 40  bitmapext = ".xpm"
40    
41  class MainWindow(wxFrame):  class MainWindow(wxFrame):
42    
43      def __init__(self, parent, ID, interactor):      def __init__(self, parent, ID, title, application, interactor,
44          wxFrame.__init__(self, parent, ID, 'Thuban',                   initial_message = None, size = wxSize(-1, -1)):
45                           wxDefaultPosition, wxSize(400, 300))          wxFrame.__init__(self, parent, ID, title, wxDefaultPosition, size)
46    
47            self.application = application
48          self.interactor = interactor          self.interactor = interactor
49    
50          self.CreateStatusBar()          self.CreateStatusBar()
51          self.SetStatusText("This is the wxPython-based "          if initial_message:
52                        "Graphical User Interface for exploring geographic data")              self.SetStatusText(initial_message)
53    
54          self.identify_view = None          self.identify_view = None
55    
56          self.init_ids()          self.init_ids()
57    
58          #main_menu.print_menu()          # creat the menubar from the main_menu description
59          self.SetMenuBar(self.build_menu_bar(main_menu))          self.SetMenuBar(self.build_menu_bar(main_menu))
60    
61          # toolbar          # Similarly, create the toolbar from main_toolbar
62          toolbar = self.CreateToolBar(wxTB_3DBUTTONS)          toolbar = self.build_toolbar(main_toolbar)
   
         # set the size of the tools' bitmaps. Not needed on wxGTK, but  
         # on Windows. We probably shouldn't hardwire the bitmap size  
         # here  
         toolbar.SetToolBitmapSize(wxSize(24, 24))  
   
         for name in ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",  
                      "map_identify_tool", "map_label_tool", "map_full_extent"]:  
             self.add_toolbar_command(toolbar, name)  
63          # call Realize to make sure that the tools appear.          # call Realize to make sure that the tools appear.
64          toolbar.Realize()          toolbar.Realize()
65    
# Line 87  class MainWindow(wxFrame): Line 79  class MainWindow(wxFrame):
79          self.current_id = 6000          self.current_id = 6000
80          self.id_to_name = {}          self.id_to_name = {}
81          self.name_to_id = {}          self.name_to_id = {}
82            self.events_bound = {}
83    
84      def get_id(self, name):      def get_id(self, name):
85          """Return the wxWindows id for the command named name.          """Return the wxWindows id for the command named name.
# Line 100  class MainWindow(wxFrame): Line 93  class MainWindow(wxFrame):
93              self.id_to_name[ID] = name              self.id_to_name[ID] = name
94          return ID          return ID
95    
96        def bind_command_events(self, command, ID):
97            """Bind the necessary events for the given command and ID"""
98            if not self.events_bound.has_key(ID):
99                # the events haven't been bound yet
100                EVT_MENU(self, ID, self.invoke_command)
101                if command.IsDynamic():
102                    EVT_UPDATE_UI(self, ID, self.update_command_ui)
103    
104      def build_menu_bar(self, menudesc):      def build_menu_bar(self, menudesc):
105          """Build and return the menu bar from the menu description"""          """Build and return the menu bar from the menu description"""
106          menu_bar = wxMenuBar()          menu_bar = wxMenuBar()
# Line 111  class MainWindow(wxFrame): Line 112  class MainWindow(wxFrame):
112          return menu_bar          return menu_bar
113    
114      def build_menu(self, menudesc):      def build_menu(self, menudesc):
115          """Build and return a wxMenu from a menudescription"""          """Return a wxMenu built from the menu description menudesc"""
116          wxmenu = wxMenu()          wxmenu = wxMenu()
117          last = None          last = None
118          for item in menudesc.items:          for item in menudesc.items:
             # here the items must all be Menu instances themselves  
119              if item is None:              if item is None:
120                  # a separator. Only add one if the last item was not a                  # a separator. Only add one if the last item was not a
121                  # separator                  # separator
# Line 130  class MainWindow(wxFrame): Line 130  class MainWindow(wxFrame):
130              last = item              last = item
131          return wxmenu          return wxmenu
132    
133        def build_toolbar(self, toolbardesc):
134            """Build and return the main toolbar window from a toolbar description
135    
136            The parameter should be an instance of the Menu class but it
137            should not contain submenus.
138            """
139            toolbar = self.CreateToolBar(wxTB_3DBUTTONS)
140    
141            # set the size of the tools' bitmaps. Not needed on wxGTK, but
142            # on Windows, although it doesn't work very well there. It seems
143            # that only 16x16 icons are really supported on windows.
144            # We probably shouldn't hardwire the bitmap size here.
145            toolbar.SetToolBitmapSize(wxSize(24, 24))
146    
147            for item in toolbardesc.items:
148                if item is None:
149                    toolbar.AddSeparator()
150                else:
151                    # assume it's a string.
152                    self.add_toolbar_command(toolbar, item)
153    
154            return toolbar
155    
156      def add_menu_command(self, menu, name):      def add_menu_command(self, menu, name):
157          """Add the command with name name to the menu menu.          """Add the command with name name to the menu menu.
158    
# Line 143  class MainWindow(wxFrame): Line 166  class MainWindow(wxFrame):
166                  ID = self.get_id(name)                  ID = self.get_id(name)
167                  menu.Append(ID, command.Title(), command.HelpText(),                  menu.Append(ID, command.Title(), command.HelpText(),
168                              command.IsCheckCommand())                              command.IsCheckCommand())
169                  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)  
170              else:              else:
171                  print "Unknown command %s" % name                  print "Unknown command %s" % name
172    
# Line 167  class MainWindow(wxFrame): Line 188  class MainWindow(wxFrame):
188                  toolbar.AddTool(ID, bitmap,                  toolbar.AddTool(ID, bitmap,
189                                  shortHelpString = command.HelpText(),                                  shortHelpString = command.HelpText(),
190                                  isToggle = command.IsCheckCommand())                                  isToggle = command.IsCheckCommand())
191                    self.bind_command_events(command, ID)
192              else:              else:
193                  print "Unknown command %s" % name                  print "Unknown command %s" % name
194    
195        def Context(self):
196            """Return the context object for a command invoked from this window
197            """
198            return Context(self.application, self.application.Session(), self)
199    
200      def invoke_command(self, event):      def invoke_command(self, event):
201          name = self.id_to_name.get(event.GetId())          name = self.id_to_name.get(event.GetId())
202          if name is not None:          if name is not None:
203              command = registry.Command(name)              command = registry.Command(name)
204              command.Execute(self)              command.Execute(self.Context())
205          else:          else:
206              print "Unknown command ID %d" % event.GetId()              print "Unknown command ID %d" % event.GetId()
207    
208      def update_command_ui(self, event):      def update_command_ui(self, event):
209          #print "update_command_ui", self.id_to_name[event.GetId()]          #print "update_command_ui", self.id_to_name[event.GetId()]
210            context = self.Context()
211          command = registry.Command(self.id_to_name[event.GetId()])          command = registry.Command(self.id_to_name[event.GetId()])
212          if command is not None:          if command is not None:
213              event.Enable(command.Sensitive(self))              event.Enable(command.Sensitive(context))
214              event.SetText(command.DynText(self))              event.SetText(command.DynText(context))
215              if command.IsCheckCommand():              if command.IsCheckCommand():
216                  event.Check(command.Checked(self))                  event.Check(command.Checked(context))
217    
218      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
219          """Run a modal message box with the given text, title and flags          """Run a modal message box with the given text, title and flags
# Line 233  class MainWindow(wxFrame): Line 261  class MainWindow(wxFrame):
261          If the can_veto parameter is true (default) the dialog includes          If the can_veto parameter is true (default) the dialog includes
262          a cancel button, otherwise not.          a cancel button, otherwise not.
263          """          """
264          if main.app.session.WasModified():          if self.application.session.WasModified():
265              flags = wxYES_NO | wxICON_QUESTION              flags = wxYES_NO | wxICON_QUESTION
266              if can_veto:              if can_veto:
267                  flags = flags | wxCANCEL                  flags = flags | wxCANCEL
# Line 249  class MainWindow(wxFrame): Line 277  class MainWindow(wxFrame):
277    
278      def NewSession(self):      def NewSession(self):
279          self.save_modified_session()          self.save_modified_session()
280          main.app.SetSession(create_empty_session())          self.application.SetSession(create_empty_session())
281    
282      def OpenSession(self):      def OpenSession(self):
283          self.save_modified_session()          self.save_modified_session()
284          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, "Select a session file", ".", "",
285                             "*.thuban", wxOPEN)                             "*.thuban", wxOPEN)
286          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
287              main.app.OpenSession(dlg.GetPath())              self.application.OpenSession(dlg.GetPath())
288          dlg.Destroy()          dlg.Destroy()
289    
290      def SaveSession(self):      def SaveSession(self):
291          if main.app.session.filename == None:          if self.application.session.filename == None:
292              self.SaveSessionAs()              self.SaveSessionAs()
293          main.app.SaveSession()          self.application.SaveSession()
294    
295      def SaveSessionAs(self):      def SaveSessionAs(self):
296          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",
297                             "*.thuban", wxOPEN)                             "*.thuban", wxOPEN)
298          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
299              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
300              main.app.SaveSession()              self.application.SaveSession()
301          dlg.Destroy()          dlg.Destroy()
302    
303      def Exit(self):      def Exit(self):
# Line 280  class MainWindow(wxFrame): Line 308  class MainWindow(wxFrame):
308          if result == wxID_CANCEL:          if result == wxID_CANCEL:
309              event.Veto()              event.Veto()
310          else:          else:
311                # FIXME: it would be better to tie the unsubscription to
312                # wx's destroy event, but that isn't implemented for wxGTK
313                # yet.
314                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
315              self.Destroy()              self.Destroy()
316    
317      def SetMap(self, map):      def SetMap(self, map):
318          self.canvas.SetMap(map)          self.canvas.SetMap(map)
319    
320        def Map(self):
321            """Return the map displayed by this mainwindow"""
322            return self.canvas.Map()
323    
324      def ShowSessionTree(self):      def ShowSessionTree(self):
325          name = "session_tree"          name = "session_tree"
326          dialog = self.get_open_dialog(name)          dialog = self.get_open_dialog(name)
327          if dialog is None:          if dialog is None:
328              dialog = tree.SessionTreeView(self, main.app, name)              dialog = tree.SessionTreeView(self, self.application, name)
329              self.add_dialog(name, dialog)              self.add_dialog(name, dialog)
330              dialog.Show(true)              dialog.Show(true)
331          else:          else:
# Line 331  class MainWindow(wxFrame): Line 367  class MainWindow(wxFrame):
367          if layer is not None:          if layer is not None:
368              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
369    
370        def CanRemoveLayer(self):
371            """Return true if the currently selected layer can be deleted.
372    
373            If no layer is selected return false.
374    
375            The return value of this method determines whether the remove
376            layer command is sensitive in menu.
377            """
378            layer = self.current_layer()
379            if layer is not None:
380                return self.canvas.Map().CanRemoveLayer(layer)
381            return 0
382    
383      def RaiseLayer(self):      def RaiseLayer(self):
384          layer = self.current_layer()          layer = self.current_layer()
385          if layer is not None:          if layer is not None:
386              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
387            
388      def LowerLayer(self):      def LowerLayer(self):
389          layer = self.current_layer()          layer = self.current_layer()
390          if layer is not None:          if layer is not None:
# Line 409  class MainWindow(wxFrame): Line 458  class MainWindow(wxFrame):
458              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
459              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
460              if dialog is None:              if dialog is None:
461                  dialog = tableview.TableFrame(self, self.interactor, name,                  dialog = tableview.LayerTableFrame(self, self.interactor, name,
462                                                "Table: %s" % layer.Title(),                                                     "Table: %s" % layer.Title(),
463                                                layer, table)                                                     layer, table)
464                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
465                  dialog.Show(true)                  dialog.Show(true)
466              else:              else:
# Line 475  class MainWindow(wxFrame): Line 524  class MainWindow(wxFrame):
524    
525  # Helper functions to define common command implementations  # Helper functions to define common command implementations
526  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
527      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
528      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
529    
530  def _method_command(name, title, method, helptext = "",  def _method_command(name, title, method, helptext = "",
531                      icon = "", sensitive = None):                      icon = "", sensitive = None):
532      """Add a command implemented by a method of the context object"""      """Add a command implemented by a method of the mainwindow object"""
533      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
534                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
535                           sensitive = sensitive))                           sensitive = sensitive))
536    
537    def make_check_current_tool(toolname):
538        """Return a function that tests if the currently active tool is toolname
539    
540        The returned function can be called with the context and returns
541        true iff the currently active tool's name is toolname. It's directly
542        usable as the 'checked' callback of a command.
543        """
544        def check_current_tool(context, name=toolname):
545            return context.mainwindow.canvas.CurrentTool() == name
546        return check_current_tool
547    
548  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
549                    icon = ""):                    icon = "", sensitive = None):
550      """Add a tool command"""      """Add a tool command"""
     def check_current_tool(context, name=toolname):  
         return context.canvas.CurrentTool() == name  
551      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
552                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
553                           checked = check_current_tool))                           checked = make_check_current_tool(toolname),
554                             sensitive = sensitive))
555    
556  def _has_selected_layer(context):  def _has_selected_layer(context):
557      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
558      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
559    
560    def _can_remove_layer(context):
561        return context.mainwindow.CanRemoveLayer()
562    
563    def _has_tree_window_shown(context):
564        """Return true if the tree window is shown"""
565        return context.mainwindow.get_open_dialog("session_tree") is None
566    
567    def _has_visible_map(context):
568        """Return true iff theres a visible map in the mainwindow.
569    
570        A visible map is a map with at least one visible layer."""
571        map = context.mainwindow.Map()
572        if map is not None:
573            for layer in map.Layers():
574                if layer.Visible():
575                    return 1
576        return 0
577    
578    
579  # File menu  # File menu
580  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", "&New Session", "NewSession")
581  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", "&Open Session", "OpenSession")
582  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", "&Save Session", "SaveSession")
583  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")
584  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree")  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree",
585  _method_command("exit", "&Exit", "Exit")                  sensitive = _has_tree_window_shown)
586    _method_command("exit", "E&xit", "Exit")
587    
588  # Help menu  # Help menu
589  _method_command("help_about", "&About", "About")  _method_command("help_about", "&About", "About")
# Line 514  _method_command("help_about", "&About", Line 593  _method_command("help_about", "&About",
593  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", "Pro&jection", "Projection")
594    
595  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",
596                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in",
597                  sensitive = _has_visible_map)
598  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",
599                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out",
600                  sensitive = _has_visible_map)
601  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",
602                helptext = "Switch to map-mode 'pan'", icon = "pan")                helptext = "Switch to map-mode 'pan'", icon = "pan",
603                  sensitive = _has_visible_map)
604  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",
605                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = "Switch to map-mode 'identify'", icon = "identify",
606                  sensitive = _has_visible_map)
607  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",
608                helptext = "Add/Remove labels", icon = "label")                helptext = "Add/Remove labels", icon = "label",
609                  sensitive = _has_visible_map)
610  _method_command("map_full_extent", "&Full extent", "FullExtent",  _method_command("map_full_extent", "&Full extent", "FullExtent",
611                 helptext = "Full Extent", icon = "fullextent")                 helptext = "Full Extent", icon = "fullextent",
612                  sensitive = _has_visible_map)
613  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")
614    
615  # Layer menu  # Layer menu
# Line 532  _method_command("layer_add", "&Add Layer Line 617  _method_command("layer_add", "&Add Layer
617                  helptext = "Add a new layer to active map")                  helptext = "Add a new layer to active map")
618  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",
619                  helptext = "Remove selected layer(s)",                  helptext = "Remove selected layer(s)",
620                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
621  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",
622                  helptext = "Set the fill color of selected layer(s)",                  helptext = "Set the fill color of selected layer(s)",
623                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
# Line 592  main_menu = Menu("<main>", "<main>", Line 677  main_menu = Menu("<main>", "<main>",
677                          "layer_show_table"]),                          "layer_show_table"]),
678                    Menu("help", "&Help",                    Menu("help", "&Help",
679                         ["help_about"])])                         ["help_about"])])
680    
681    # the main toolbar
682    
683    main_toolbar = Menu("<toolbar>", "<toolbar>",
684                        ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
685                         "map_identify_tool", "map_label_tool", "map_full_extent"])
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