/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/mainwindow.py
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revision 264 by jan, Fri Aug 16 17:06:38 2002 UTC revision 357 by bh, Mon Dec 9 10:32:27 2002 UTC
# Line 29  import tableview, identifyview Line 29  import tableview, identifyview
29  from menu import Menu  from menu import Menu
30    
31  from context import Context  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 112  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 193  class MainWindow(wxFrame): Line 192  class MainWindow(wxFrame):
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              context = Context(self.application, self.application.Session(),              command.Execute(self.Context())
                               self)  
             command.Execute(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 = Context(self.application, self.application.Session(), self)          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(context))              sensitive = command.Sensitive(context)
214                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))              event.SetText(command.DynText(context))
224              if command.IsCheckCommand():              if command.IsCheckCommand():
225                  event.Check(command.Checked(context))                      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 248  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 306  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)
# Line 326  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 357  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:
# Line 435  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 511  def _method_command(name, title, method, Line 553  def _method_command(name, title, method,
553                           helptext = helptext, icon = icon,                           helptext = helptext, icon = icon,
554                           sensitive = sensitive))                           sensitive = sensitive))
555    
556  def _tool_command(name, title, method, toolname, helptext = "",  def make_check_current_tool(toolname):
557                    icon = ""):      """Return a function that tests if the currently active tool is toolname
558      """Add a tool command"""  
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):      def check_current_tool(context, name=toolname):
564          return context.mainwindow.canvas.CurrentTool() == name          return context.mainwindow.canvas.CurrentTool() == name
565      registry.Add(Command(name, title, call_method, args=(method,),      return check_current_tool
566                           helptext = helptext, icon = icon,  
567                           checked = check_current_tool))  def _tool_command(name, title, method, toolname, helptext = "",
568                      icon = "", sensitive = None):
569        """Add a tool command"""
570        registry.Add(ToolCommand(name, title, call_method, args=(method,),
571                                 helptext = helptext, icon = icon,
572                                 checked = make_check_current_tool(toolname),
573                                 sensitive = sensitive))
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.mainwindow.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):  def _has_tree_window_shown(context):
583      """Return true if the tree window is shown"""      """Return true if the tree window is shown"""
584      return context.mainwindow.get_open_dialog("session_tree") is None      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")
# Line 535  _method_command("save_session", "&Save S Line 602  _method_command("save_session", "&Save S
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                  sensitive = _has_tree_window_shown)                  sensitive = _has_tree_window_shown)
605  _method_command("exit", "&Exit", "Exit")  _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 545  _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 563  _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 627  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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