/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tree.py
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revision 41 by bh, Thu Sep 6 18:58:46 2001 UTC revision 198 by jan, Thu Jun 20 15:24:26 2002 UTC
# Line 1  Line 1 
1  #! /usr/bin/python  #! /usr/bin/python
2  # Copyright (c) 2001 by Intevation GmbH  # Copyright (c) 2001, 2002 by Intevation GmbH
3  # Authors:  # Authors:
4  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
5  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
# Line 12  __version__ = "$Revision$" Line 12  __version__ = "$Revision$"
12  from wxPython.wx import *  from wxPython.wx import *
13    
14  from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \  from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \
15       LAYERS_CHANGED, LAYER_LEGEND_CHANGED, LAYER_VISIBILITY_CHANGED       LAYERS_CHANGED, LAYER_LEGEND_CHANGED, LAYER_VISIBILITY_CHANGED, \
16         EXTENSIONS_CHANGED, EXTENSION_OBJECTS_CHANGED
17  from Thuban.Model.layer import Layer, shapetype_names  from Thuban.Model.layer import Layer, shapetype_names
18  from Thuban.Model.map import Map  from Thuban.Model.map import Map
19    
# Line 27  def color_string(color): Line 28  def color_string(color):
28    
29  class SessionTreeCtrl(wxTreeCtrl):  class SessionTreeCtrl(wxTreeCtrl):
30    
31        # the session channels to subscribe to update the tree
32        session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,
33                            LAYERS_CHANGED, LAYER_LEGEND_CHANGED,
34                            LAYER_VISIBILITY_CHANGED, EXTENSIONS_CHANGED,
35                            EXTENSION_OBJECTS_CHANGED)
36    
37      def __init__(self, parent, ID, app):      def __init__(self, parent, ID, app):
38          # Use the WANTS_CHARS style so the panel doesn't eat the Return key.          # Use the WANTS_CHARS style so the panel doesn't eat the Return key.
39          wxTreeCtrl.__init__(self, parent, ID)          wxTreeCtrl.__init__(self, parent, ID)
# Line 41  class SessionTreeCtrl(wxTreeCtrl): Line 48  class SessionTreeCtrl(wxTreeCtrl):
48    
49          self.app.Subscribe(SESSION_CHANGED, self.session_changed)          self.app.Subscribe(SESSION_CHANGED, self.session_changed)
50          self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)          self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
51    
52            # the session currently displayed in the tree
53            self.session = None
54    
55          # pretend the session has changed to build the initial tree          # pretend the session has changed to build the initial tree
56          self.session_changed()          self.session_changed()
57    
58          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
59    
60        def unsubscribe_all(self):
61            if self.session is not None:
62                for channel in self.session_channels:
63                    self.session.Unsubscribe(channel, self.update_tree)
64                self.session = None
65            self.app.Unsubscribe(SESSION_CHANGED, self.session_changed)
66            self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)
67    
68      def update_tree(self, *args):      def update_tree(self, *args):
69          """Clear and rebuild the tree"""          """Clear and rebuild the tree"""
70          self.DeleteAllItems()          self.DeleteAllItems()
71          session = self.app.session          session = self.app.session
72          root = self.AddRoot("Session: %s" % session.title)          root = self.AddRoot("Session: %s" % session.title)
73          self.layer_to_item.clear()          self.layer_to_item.clear()
74            if session.filename == None:
75                self.AppendItem(root, "Filename:")
76            else:
77                self.AppendItem(root, "Filename: %s" % session.filename)
78            if session.WasModified():
79                self.AppendItem(root, "Modified: yes")
80            else:
81                self.AppendItem(root, "Modified: no")
82    
83          for map in session.Maps():          for map in session.Maps():
84              mapitem = self.AppendItem(root, "Map: %s" % map.title)              mapitem = self.AppendItem(root, "Map: %s" % map.title)
85              self.SetPyData(mapitem, map)              self.SetPyData(mapitem, map)
86                if map.BoundingBox() != None:
87                    self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"
88                                              % map.BoundingBox()))
89              if map.projection and len(map.projection.params) > 0:              if map.projection and len(map.projection.params) > 0:
90                    self.AppendItem(mapitem,
91                                    ("Extent (projected): (%g, %g, %g, %g)"
92                                     % map.ProjectedBoundingBox()))
93                  projectionitem = self.AppendItem(mapitem, "Projection")                  projectionitem = self.AppendItem(mapitem, "Projection")
94                  for param in map.projection.params:                  for param in map.projection.params:
95                      parameteritem = self.AppendItem(projectionitem, str(param))                      parameteritem = self.AppendItem(projectionitem, str(param))
# Line 79  class SessionTreeCtrl(wxTreeCtrl): Line 113  class SessionTreeCtrl(wxTreeCtrl):
113                          text = "Hidden"                          text = "Hidden"
114                      self.AppendItem(layeritem, text)                      self.AppendItem(layeritem, text)
115                      self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())                      self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())
116                      self.AppendItem(layeritem, ("Extents: (%g, %g, %g, %g)"                      bbox = layer.LatLongBoundingBox()
117                                                  % layer.LatLongBoundingBox()))                      if bbox is not None:
118                            self.AppendItem(layeritem,
119                                            ("Extent (lat-lon): (%g, %g, %g, %g)"
120                                             % bbox))
121                        else:
122                            self.AppendItem(layeritem, ("Extent (lat-lon):"))
123                      self.AppendItem(layeritem,                      self.AppendItem(layeritem,
124                                      "Shapetype: %s"                                      "Shapetype: %s"
125                                      % shapetype_names[layer.ShapeType()])                                      % shapetype_names[layer.ShapeType()])
# Line 92  class SessionTreeCtrl(wxTreeCtrl): Line 131  class SessionTreeCtrl(wxTreeCtrl):
131              self.Expand(mapitem)              self.Expand(mapitem)
132          self.Expand(root)          self.Expand(root)
133    
134            for extension in session.Extensions():
135                extensionitem = self.AppendItem(root, "Extension: %s" %
136                                                extension.title)
137                for object in extension.Objects():
138                    objectitem = self.AppendItem(extensionitem, "%s: %s" %
139                                                 (object.title, object.name))
140                self.Expand(extensionitem)
141    
142    
143      def session_changed(self, *args):      def session_changed(self, *args):
144          for channel in (MAPS_CHANGED,          new_session = self.app.session
145                          MAP_PROJECTION_CHANGED,          # if the session has changed subscribe/unsubscribe
146                          LAYERS_CHANGED,          if self.session is not new_session:
147                          LAYER_LEGEND_CHANGED,              if self.session is not None:
148                          LAYER_VISIBILITY_CHANGED):                  for channel in self.session_channels:
149              self.app.session.Subscribe(channel, self.update_tree)                      self.session.Unsubscribe(channel, self.update_tree)
150                if new_session is not None:
151                    for channel in self.session_channels:
152                        new_session.Subscribe(channel, self.update_tree)
153                self.session = new_session
154          self.update_tree()          self.update_tree()
155    
156      def normalize_selection(self):      def normalize_selection(self):
# Line 130  class SessionTreeCtrl(wxTreeCtrl): Line 182  class SessionTreeCtrl(wxTreeCtrl):
182              # self.normalize_selection(). ignore the event.              # self.normalize_selection(). ignore the event.
183              return              return
184          self.normalize_selection()          self.normalize_selection()
185          layer = self.SelectedLayer()          # SelectedLayer returns None if no layer is selected. Since
186          if layer is not None:          # passing None to interactor.SelectLayer deselects the layer we
187              self.app.interactor.SelectLayer(layer)          # can simply pass the result of SelectedLayer on in all cases
188            self.app.interactor.SelectLayer(self.SelectedLayer())
189    
190      def layer_selected(self, layer):      def layer_selected(self, layer):
191          item = self.layer_to_item.get(id(layer))          item = self.layer_to_item.get(id(layer))
# Line 152  class SessionTreeView(NonModalDialog): Line 205  class SessionTreeView(NonModalDialog):
205          #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)          #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)
206          NonModalDialog.OnClose(self, event)          NonModalDialog.OnClose(self, event)
207    
208            # if there were a way to get notified when the tree control
209            # itself is destroyed we could use that to unsubscribe instead
210            # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
211            # all)
212            self.tree.unsubscribe_all()
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