/[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 357 by bh, Mon Dec 9 10:32:27 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, ToolCommand
33  from messages import SELECTED_SHAPE, VIEW_POSITION  from messages import SELECTED_SHAPE, VIEW_POSITION
34    
35    
# 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))              sensitive = command.Sensitive(context)
214              event.SetText(command.DynText(self))              event.Enable(sensitive)
215                if command.IsTool() and not sensitive and command.Checked(context):
216                    # When a checked tool command is disabled deselect all
217                    # tools. Otherwise the tool would remain active but it
218                    # might lead to errors if the tools stays active. This
219                    # problem occurred in GREAT-ER and this fixes it, but
220                    # it's not clear to me whether this is really the best
221                    # way to do it (BH, 20021206).
222                    self.canvas.SelectTool(None)
223                event.SetText(command.DynText(context))
224              if command.IsCheckCommand():              if command.IsCheckCommand():
225                  event.Check(command.Checked(self))                      event.Check(command.Checked(context))
226    
227      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):      def RunMessageBox(self, title, text, flags = wxOK | wxICON_INFORMATION):
228          """Run a modal message box with the given text, title and flags          """Run a modal message box with the given text, title and flags
229          and return the result"""          and return the result"""
230          dlg = wxMessageDialog(self, text, title, flags)          dlg = wxMessageDialog(self, text, title, flags)
231            dlg.CenterOnParent()
232          result = dlg.ShowModal()          result = dlg.ShowModal()
233          dlg.Destroy()          dlg.Destroy()
234          return result          return result
# Line 236  class MainWindow(wxFrame): Line 260  class MainWindow(wxFrame):
260              text = "(%10.10g, %10.10g)" % pos              text = "(%10.10g, %10.10g)" % pos
261          else:          else:
262              text = ""              text = ""
263            self.set_position_text(text)
264    
265        def set_position_text(self, text):
266            """Set the statusbar text showing the current position.
267    
268            By default the text is shown in field 0 of the status bar.
269            Override this method in derived classes to put it into a
270            different field of the statusbar.
271            """
272          self.SetStatusText(text)          self.SetStatusText(text)
273    
274      def save_modified_session(self, can_veto = 1):      def save_modified_session(self, can_veto = 1):
# Line 247  class MainWindow(wxFrame): Line 280  class MainWindow(wxFrame):
280          If the can_veto parameter is true (default) the dialog includes          If the can_veto parameter is true (default) the dialog includes
281          a cancel button, otherwise not.          a cancel button, otherwise not.
282          """          """
283          if main.app.session.WasModified():          if self.application.session.WasModified():
284              flags = wxYES_NO | wxICON_QUESTION              flags = wxYES_NO | wxICON_QUESTION
285              if can_veto:              if can_veto:
286                  flags = flags | wxCANCEL                  flags = flags | wxCANCEL
# Line 263  class MainWindow(wxFrame): Line 296  class MainWindow(wxFrame):
296    
297      def NewSession(self):      def NewSession(self):
298          self.save_modified_session()          self.save_modified_session()
299          main.app.SetSession(create_empty_session())          self.application.SetSession(create_empty_session())
300    
301      def OpenSession(self):      def OpenSession(self):
302          self.save_modified_session()          self.save_modified_session()
303          dlg = wxFileDialog(self, "Select a session file", ".", "",          dlg = wxFileDialog(self, "Select a session file", ".", "",
304                             "*.thuban", wxOPEN)                             "*.thuban", wxOPEN)
305          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
306              main.app.OpenSession(dlg.GetPath())              self.application.OpenSession(dlg.GetPath())
307          dlg.Destroy()          dlg.Destroy()
308    
309      def SaveSession(self):      def SaveSession(self):
310          if main.app.session.filename == None:          if self.application.session.filename == None:
311              self.SaveSessionAs()              self.SaveSessionAs()
312          main.app.SaveSession()          self.application.SaveSession()
313    
314      def SaveSessionAs(self):      def SaveSessionAs(self):
315          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",          dlg = wxFileDialog(self, "Enter a filename for session", ".", "",
316                             "*.thuban", wxOPEN)                             "*.thuban", wxOPEN)
317          if dlg.ShowModal() == wxID_OK:          if dlg.ShowModal() == wxID_OK:
318              main.app.session.SetFilename(dlg.GetPath())              self.application.session.SetFilename(dlg.GetPath())
319              main.app.SaveSession()              self.application.SaveSession()
320          dlg.Destroy()          dlg.Destroy()
321    
322      def Exit(self):      def Exit(self):
# Line 294  class MainWindow(wxFrame): Line 327  class MainWindow(wxFrame):
327          if result == wxID_CANCEL:          if result == wxID_CANCEL:
328              event.Veto()              event.Veto()
329          else:          else:
330                # FIXME: it would be better to tie the unsubscription to
331                # wx's destroy event, but that isn't implemented for wxGTK
332                # yet.
333                self.canvas.Unsubscribe(VIEW_POSITION, self.view_position_changed)
334              self.Destroy()              self.Destroy()
335    
336      def SetMap(self, map):      def SetMap(self, map):
337          self.canvas.SetMap(map)          self.canvas.SetMap(map)
338    
339        def Map(self):
340            """Return the map displayed by this mainwindow"""
341            return self.canvas.Map()
342    
343      def ShowSessionTree(self):      def ShowSessionTree(self):
344          name = "session_tree"          name = "session_tree"
345          dialog = self.get_open_dialog(name)          dialog = self.get_open_dialog(name)
346          if dialog is None:          if dialog is None:
347              dialog = tree.SessionTreeView(self, main.app, name)              dialog = tree.SessionTreeView(self, self.application, name)
348              self.add_dialog(name, dialog)              self.add_dialog(name, dialog)
349              dialog.Show(true)              dialog.Show(true)
350          else:          else:
# Line 314  class MainWindow(wxFrame): Line 355  class MainWindow(wxFrame):
355          self.RunMessageBox("About",          self.RunMessageBox("About",
356                             ("Thuban is a program for\n"                             ("Thuban is a program for\n"
357                              "exploring geographic data.\n"                              "exploring geographic data.\n"
358                              "Copyright (C) 2001 Intevation GmbH.\n"                              "Copyright (C) 2001, 2002 Intevation GmbH.\n"
359                              "Thuban is licensed under the GPL"),                              "Thuban is licensed under the GPL"),
360                             wxOK | wxICON_INFORMATION)                             wxOK | wxICON_INFORMATION)
361    
# Line 345  class MainWindow(wxFrame): Line 386  class MainWindow(wxFrame):
386          if layer is not None:          if layer is not None:
387              self.canvas.Map().RemoveLayer(layer)              self.canvas.Map().RemoveLayer(layer)
388    
389        def CanRemoveLayer(self):
390            """Return true if the currently selected layer can be deleted.
391    
392            If no layer is selected return false.
393    
394            The return value of this method determines whether the remove
395            layer command is sensitive in menu.
396            """
397            layer = self.current_layer()
398            if layer is not None:
399                return self.canvas.Map().CanRemoveLayer(layer)
400            return 0
401    
402      def RaiseLayer(self):      def RaiseLayer(self):
403          layer = self.current_layer()          layer = self.current_layer()
404          if layer is not None:          if layer is not None:
405              self.canvas.Map().RaiseLayer(layer)              self.canvas.Map().RaiseLayer(layer)
406            
407      def LowerLayer(self):      def LowerLayer(self):
408          layer = self.current_layer()          layer = self.current_layer()
409          if layer is not None:          if layer is not None:
# Line 423  class MainWindow(wxFrame): Line 477  class MainWindow(wxFrame):
477              name = "table_view" + str(id(table))              name = "table_view" + str(id(table))
478              dialog = self.get_open_dialog(name)              dialog = self.get_open_dialog(name)
479              if dialog is None:              if dialog is None:
480                  dialog = tableview.TableFrame(self, self.interactor, name,                  dialog = tableview.LayerTableFrame(self, self.interactor, name,
481                                                "Table: %s" % layer.Title(),                                                     "Table: %s" % layer.Title(),
482                                                layer, table)                                                     layer, table)
483                  self.add_dialog(name, dialog)                  self.add_dialog(name, dialog)
484                  dialog.Show(true)                  dialog.Show(true)
485              else:              else:
# Line 489  class MainWindow(wxFrame): Line 543  class MainWindow(wxFrame):
543    
544  # Helper functions to define common command implementations  # Helper functions to define common command implementations
545  def call_method(context, methodname, *args):  def call_method(context, methodname, *args):
546      """Call the context's method methodname with args *args"""      """Call the mainwindow's method methodname with args *args"""
547      apply(getattr(context, methodname), args)      apply(getattr(context.mainwindow, methodname), args)
548    
549  def _method_command(name, title, method, helptext = "",  def _method_command(name, title, method, helptext = "",
550                      icon = "", sensitive = None):                      icon = "", sensitive = None):
551      """Add a command implemented by a method of the context object"""      """Add a command implemented by a method of the mainwindow object"""
552      registry.Add(Command(name, title, call_method, args=(method,),      registry.Add(Command(name, title, call_method, args=(method,),
553                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
554                           sensitive = sensitive))                           sensitive = sensitive))
555    
556    def make_check_current_tool(toolname):
557        """Return a function that tests if the currently active tool is toolname
558    
559        The returned function can be called with the context and returns
560        true iff the currently active tool's name is toolname. It's directly
561        usable as the 'checked' callback of a command.
562        """
563        def check_current_tool(context, name=toolname):
564            return context.mainwindow.canvas.CurrentTool() == name
565        return check_current_tool
566    
567  def _tool_command(name, title, method, toolname, helptext = "",  def _tool_command(name, title, method, toolname, helptext = "",
568                    icon = ""):                    icon = "", sensitive = None):
569      """Add a tool command"""      """Add a tool command"""
570      def check_current_tool(context, name=toolname):      registry.Add(ToolCommand(name, title, call_method, args=(method,),
571          return context.canvas.CurrentTool() == name                               helptext = helptext, icon = icon,
572      registry.Add(Command(name, title, call_method, args=(method,),                               checked = make_check_current_tool(toolname),
573                           helptext = helptext, icon = icon,                               sensitive = sensitive))
                          checked = check_current_tool))  
574    
575  def _has_selected_layer(context):  def _has_selected_layer(context):
576      """Return true if a layer is selected in the context"""      """Return true if a layer is selected in the context"""
577      return context.has_selected_layer()      return context.mainwindow.has_selected_layer()
578    
579    def _can_remove_layer(context):
580        return context.mainwindow.CanRemoveLayer()
581    
582    def _has_tree_window_shown(context):
583        """Return true if the tree window is shown"""
584        return context.mainwindow.get_open_dialog("session_tree") is None
585    
586    def _has_visible_map(context):
587        """Return true iff theres a visible map in the mainwindow.
588    
589        A visible map is a map with at least one visible layer."""
590        map = context.mainwindow.Map()
591        if map is not None:
592            for layer in map.Layers():
593                if layer.Visible():
594                    return 1
595        return 0
596    
597    
598  # File menu  # File menu
599  _method_command("new_session", "&New Session", "NewSession")  _method_command("new_session", "&New Session", "NewSession")
600  _method_command("open_session", "&Open Session", "OpenSession")  _method_command("open_session", "&Open Session", "OpenSession")
601  _method_command("save_session", "&Save Session", "SaveSession")  _method_command("save_session", "&Save Session", "SaveSession")
602  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")  _method_command("save_session_as", "Save Session &As", "SaveSessionAs")
603  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree")  _method_command("show_session_tree", "Show Session &Tree", "ShowSessionTree",
604  _method_command("exit", "&Exit", "Exit")                  sensitive = _has_tree_window_shown)
605    _method_command("exit", "E&xit", "Exit")
606    
607  # Help menu  # Help menu
608  _method_command("help_about", "&About", "About")  _method_command("help_about", "&About", "About")
# Line 528  _method_command("help_about", "&About", Line 612  _method_command("help_about", "&About",
612  _method_command("map_projection", "Pro&jection", "Projection")  _method_command("map_projection", "Pro&jection", "Projection")
613    
614  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",  _tool_command("map_zoom_in_tool", "&Zoom in", "ZoomInTool", "ZoomInTool",
615                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in")                helptext = "Switch to map-mode 'zoom-in'", icon = "zoom_in",
616                  sensitive = _has_visible_map)
617  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",  _tool_command("map_zoom_out_tool", "Zoom &out", "ZoomOutTool", "ZoomOutTool",
618                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out")                helptext = "Switch to map-mode 'zoom-out'", icon = "zoom_out",
619                  sensitive = _has_visible_map)
620  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",  _tool_command("map_pan_tool", "&Pan", "PanTool", "PanTool",
621                helptext = "Switch to map-mode 'pan'", icon = "pan")                helptext = "Switch to map-mode 'pan'", icon = "pan",
622                  sensitive = _has_visible_map)
623  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",  _tool_command("map_identify_tool", "&Identify", "IdentifyTool", "IdentifyTool",
624                helptext = "Switch to map-mode 'identify'", icon = "identify")                helptext = "Switch to map-mode 'identify'", icon = "identify",
625                  sensitive = _has_visible_map)
626  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",  _tool_command("map_label_tool", "&Label", "LabelTool", "LabelTool",
627                helptext = "Add/Remove labels", icon = "label")                helptext = "Add/Remove labels", icon = "label",
628                  sensitive = _has_visible_map)
629  _method_command("map_full_extent", "&Full extent", "FullExtent",  _method_command("map_full_extent", "&Full extent", "FullExtent",
630                 helptext = "Full Extent", icon = "fullextent")                 helptext = "Full Extent", icon = "fullextent",
631                  sensitive = _has_visible_map)
632  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")  _method_command("map_print", "Prin&t", "PrintMap", helptext = "Print the map")
633    
634  # Layer menu  # Layer menu
# Line 546  _method_command("layer_add", "&Add Layer Line 636  _method_command("layer_add", "&Add Layer
636                  helptext = "Add a new layer to active map")                  helptext = "Add a new layer to active map")
637  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",  _method_command("layer_remove", "&Remove Layer", "RemoveLayer",
638                  helptext = "Remove selected layer(s)",                  helptext = "Remove selected layer(s)",
639                  sensitive = _has_selected_layer)                  sensitive = _can_remove_layer)
640  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",  _method_command("layer_fill_color", "&Fill Color", "LayerFillColor",
641                  helptext = "Set the fill color of selected layer(s)",                  helptext = "Set the fill color of selected layer(s)",
642                  sensitive = _has_selected_layer)                  sensitive = _has_selected_layer)
# Line 610  main_menu = Menu("<main>", "<main>", Line 700  main_menu = Menu("<main>", "<main>",
700  # the main toolbar  # the main toolbar
701    
702  main_toolbar = Menu("<toolbar>", "<toolbar>",  main_toolbar = Menu("<toolbar>", "<toolbar>",
703                      ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",                      ["map_zoom_in_tool", "map_zoom_out_tool", "map_pan_tool",
704                       "map_identify_tool", "map_label_tool", "map_full_extent"])                       "map_full_extent", None,
705                         "map_identify_tool", "map_label_tool"])
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