/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 191 by bh, Tue May 28 16:04:49 2002 UTC revision 351 by frank, Wed Nov 6 14:46:33 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    
# Line 78  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 91  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 102  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 157  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 181  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
220          and return the result"""          and return the result"""
221          dlg = wxMessageDialog(self, text, title, flags)          dlg = wxMessageDialog(self, text, title, flags)
222            dlg.CenterOnParent()
223          result = dlg.ShowModal()          result = dlg.ShowModal()
224          dlg.Destroy()          dlg.Destroy()
225          return result          return result
# Line 236  class MainWindow(wxFrame): Line 251  class MainWindow(wxFrame):
251              text = "(%10.10g, %10.10g)" % pos              text = "(%10.10g, %10.10g)" % pos
252          else:          else:
253              text = ""              text = ""
254            self.set_position_text(text)
255    
256        def set_position_text(self, text):
257            """Set the statusbar text showing the current position.
258    
259            By default the text is shown in field 0 of the status bar.
260            Override this method in derived classes to put it into a
261            different field of the statusbar.
262            """
263          self.SetStatusText(text)          self.SetStatusText(text)
264    
265      def save_modified_session(self, can_veto = 1):      def save_modified_session(self, can_veto = 1):
# Line 247  class MainWindow(wxFrame): Line 271  class MainWindow(wxFrame):
271          If the can_veto parameter is true (default) the dialog includes          If the can_veto parameter is true (default) the dialog includes
272          a cancel button, otherwise not.          a cancel button, otherwise not.
273          """          """
274          if main.app.session.WasModified():          if self.application.session.WasModified():
275              flags = wxYES_NO | wxICON_QUESTION              flags = wxYES_NO | wxICON_QUESTION
276              if can_veto:              if can_veto:
277                  flags = flags | wxCANCEL                  flags = flags | wxCANCEL
# Line 263  class MainWindow(wxFrame): Line 287  class MainWindow(wxFrame):
287    
288      def NewSession(self):      def NewSession(self):
289          self.save_modified_session()          self.save_modified_session()
290          main.app.SetSession(create_empty_session())          self.application.SetSession(create_empty_session())
291    
292      def OpenSession(self):      def OpenSession(self):
293          self.save_modified_session()          self.save_modified_session()
294          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, "Select a session file", ".", "",
295                             "*.thuban", wxOPEN)                             "*.thuban", wxOPEN)
296          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
297              main.app.OpenSession(dlg.GetPath())              self.application.OpenSession(dlg.GetPath())
298          dlg.Destroy()          dlg.Destroy()
299    
300      def SaveSession(self):      def SaveSession(self):
301          if main.app.session.filename == None:          if self.application.session.filename == None:
302              self.SaveSessionAs()              self.SaveSessionAs()
303          main.app.SaveSession()          self.application.SaveSession()
304    
305      def SaveSessionAs(self):      def SaveSessionAs(self):
306          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",
307                             "*.thuban", wxOPEN)                             "*.thuban", wxOPEN)
308          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
309              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
310              main.app.SaveSession()              self.application.SaveSession()
311          dlg.Destroy()          dlg.Destroy()
312    
313      def Exit(self):      def Exit(self):
# Line 294  class MainWindow(wxFrame): Line 318  class MainWindow(wxFrame):
318          if result == wxID_CANCEL:          if result == wxID_CANCEL:
319              event.Veto()              event.Veto()
320          else:          else:
321                # FIXME: it would be better to tie the unsubscription to
322                # wx's destroy event, but that isn't implemented for wxGTK
323                # yet.
324                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
325              self.Destroy()              self.Destroy()
326    
327      def SetMap(self, map):      def SetMap(self, map):
328          self.canvas.SetMap(map)          self.canvas.SetMap(map)
329    
330        def Map(self):
331            """Return the map displayed by this mainwindow"""
332            return self.canvas.Map()
333    
334      def ShowSessionTree(self):      def ShowSessionTree(self):
335          name = "session_tree"          name = "session_tree"
336          dialog = self.get_open_dialog(name)          dialog = self.get_open_dialog(name)
337          if dialog is None:          if dialog is None:
338              dialog = tree.SessionTreeView(self, main.app, name)              dialog = tree.SessionTreeView(self, self.application, name)
339              self.add_dialog(name, dialog)              self.add_dialog(name, dialog)
340              dialog.Show(true)              dialog.Show(true)
341          else:          else:
# Line 314  class MainWindow(wxFrame): Line 346  class MainWindow(wxFrame):
346          self.RunMessageBox("About",          self.RunMessageBox("About",
347                             ("Thuban is a program for\n"                             ("Thuban is a program for\n"
348                              "exploring geographic data.\n"                              "exploring geographic data.\n"
349                              "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001, 2002 Intevation GmbH.\n"
350                              "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GPL"),
351                             wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
352    
# Line 345  class MainWindow(wxFrame): Line 377  class MainWindow(wxFrame):
377          if layer is not None:          if layer is not None:
378              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
379    
380        def CanRemoveLayer(self):
381            """Return true if the currently selected layer can be deleted.
382    
383            If no layer is selected return false.
384    
385            The return value of this method determines whether the remove
386            layer command is sensitive in menu.
387            """
388            layer = self.current_layer()
389            if layer is not None:
390                return self.canvas.Map().CanRemoveLayer(layer)
391            return 0
392    
393      def RaiseLayer(self):      def RaiseLayer(self):
394          layer = self.current_layer()          layer = self.current_layer()
395          if layer is not None:          if layer is not None:
396              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
397            
398      def LowerLayer(self):      def LowerLayer(self):
399          layer = self.current_layer()          layer = self.current_layer()
400          if layer is not None:          if layer is not None:
# Line 423  class MainWindow(wxFrame): Line 468  class MainWindow(wxFrame):
468              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
469              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
470              if dialog is None:              if dialog is None:
471                  dialog = tableview.TableFrame(self, self.interactor, name,                  dialog = tableview.LayerTableFrame(self, self.interactor, name,
472                                                "Table: %s" % layer.Title(),                                                     "Table: %s" % layer.Title(),
473                                                layer, table)                                                     layer, table)
474                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
475                  dialog.Show(true)                  dialog.Show(true)
476              else:              else:
# Line 489  class MainWindow(wxFrame): Line 534  class MainWindow(wxFrame):
534    
535  # Helper functions to define common command implementations  # Helper functions to define common command implementations
536  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
537      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
538      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
539    
540  def _method_command(name, title, method, helptext = "",  def _method_command(name, title, method, helptext = "",
541                      icon = "", sensitive = None):                      icon = "", sensitive = None):
542      """Add a command implemented by a method of the context object"""      """Add a command implemented by a method of the mainwindow object"""
543      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
544                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
545                           sensitive = sensitive))                           sensitive = sensitive))
546    
547    def make_check_current_tool(toolname):
548        """Return a function that tests if the currently active tool is toolname
549    
550        The returned function can be called with the context and returns
551        true iff the currently active tool's name is toolname. It's directly
552        usable as the 'checked' callback of a command.
553        """
554        def check_current_tool(context, name=toolname):
555            return context.mainwindow.canvas.CurrentTool() == name
556        return check_current_tool
557    
558  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
559                    icon = ""):                    icon = "", sensitive = None):
560      """Add a tool command"""      """Add a tool command"""
     def check_current_tool(context, name=toolname):  
         return context.canvas.CurrentTool() == name  
561      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
562                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
563                           checked = check_current_tool))                           checked = make_check_current_tool(toolname),
564                             sensitive = sensitive))
565    
566  def _has_selected_layer(context):  def _has_selected_layer(context):
567      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
568      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
569    
570    def _can_remove_layer(context):
571        return context.mainwindow.CanRemoveLayer()
572    
573    def _has_tree_window_shown(context):
574        """Return true if the tree window is shown"""
575        return context.mainwindow.get_open_dialog("session_tree") is None
576    
577    def _has_visible_map(context):
578        """Return true iff theres a visible map in the mainwindow.
579    
580        A visible map is a map with at least one visible layer."""
581        map = context.mainwindow.Map()
582        if map is not None:
583            for layer in map.Layers():
584                if layer.Visible():
585                    return 1
586        return 0
587    
588    
589  # File menu  # File menu
590  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", "&New Session", "NewSession")
591  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", "&Open Session", "OpenSession")
592  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", "&Save Session", "SaveSession")
593  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")
594  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree")  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree",
595  _method_command("exit", "&Exit", "Exit")                  sensitive = _has_tree_window_shown)
596    _method_command("exit", "E&xit", "Exit")
597    
598  # Help menu  # Help menu
599  _method_command("help_about", "&About", "About")  _method_command("help_about", "&About", "About")
# Line 528  _method_command("help_about", "&About", Line 603  _method_command("help_about", "&About",
603  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", "Pro&jection", "Projection")
604    
605  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",
606                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in",
607                  sensitive = _has_visible_map)
608  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",
609                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out",
610                  sensitive = _has_visible_map)
611  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",
612                helptext = "Switch to map-mode 'pan'", icon = "pan")                helptext = "Switch to map-mode 'pan'", icon = "pan",
613                  sensitive = _has_visible_map)
614  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",
615                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = "Switch to map-mode 'identify'", icon = "identify",
616                  sensitive = _has_visible_map)
617  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",
618                helptext = "Add/Remove labels", icon = "label")                helptext = "Add/Remove labels", icon = "label",
619                  sensitive = _has_visible_map)
620  _method_command("map_full_extent", "&Full extent", "FullExtent",  _method_command("map_full_extent", "&Full extent", "FullExtent",
621                 helptext = "Full Extent", icon = "fullextent")                 helptext = "Full Extent", icon = "fullextent",
622                  sensitive = _has_visible_map)
623  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")
624    
625  # Layer menu  # Layer menu
# Line 546  _method_command("layer_add", "&Add Layer Line 627  _method_command("layer_add", "&Add Layer
627                  helptext = "Add a new layer to active map")                  helptext = "Add a new layer to active map")
628  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",
629                  helptext = "Remove selected layer(s)",                  helptext = "Remove selected layer(s)",
630                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
631  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",
632                  helptext = "Set the fill color of selected layer(s)",                  helptext = "Set the fill color of selected layer(s)",
633                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
# Line 610  main_menu = Menu("<main>", "<main>", Line 691  main_menu = Menu("<main>", "<main>",
691  # the main toolbar  # the main toolbar
692    
693  main_toolbar = Menu("<toolbar>", "<toolbar>",  main_toolbar = Menu("<toolbar>", "<toolbar>",
694                      ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",                      ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
695                       "map_identify_tool", "map_label_tool", "map_full_extent"])                       "map_full_extent", None,
696                         "map_identify_tool", "map_label_tool"])
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