/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tree.py
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revision 36 by bh, Thu Sep 6 17:16:06 2001 UTC revision 177 by bh, Wed May 15 14:02:09 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 25  def color_string(color): Line 25  def color_string(color):
25      return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)      return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)
26    
27    
28  class SessioinTreeCtrl(wxTreeCtrl):  class SessionTreeCtrl(wxTreeCtrl):
29    
30        # the session channels to subscribe to to update the tree
31        session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,
32                            LAYERS_CHANGED, LAYER_LEGEND_CHANGED,
33                            LAYER_VISIBILITY_CHANGED)
34    
35      def __init__(self, parent, ID, app):      def __init__(self, parent, ID, app):
36          # 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.
# Line 36  class SessioinTreeCtrl(wxTreeCtrl): Line 41  class SessioinTreeCtrl(wxTreeCtrl):
41          # so that we can ignore the selection events generated          # so that we can ignore the selection events generated
42          self.changing_selection = 0          self.changing_selection = 0
43    
44            # Dictionary mapping layer id's to tree items
45            self.layer_to_item = {}
46    
47          self.app.Subscribe(SESSION_CHANGED, self.session_changed)          self.app.Subscribe(SESSION_CHANGED, self.session_changed)
48          self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)          self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
49    
50            # the session currently displayed in the tree
51            self.session = None
52    
53          # pretend the session has changed to build the initial tree          # pretend the session has changed to build the initial tree
54          self.session_changed()          self.session_changed()
55    
56          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
57    
58        def unsubscribe_all(self):
59            if self.session is not None:
60                for channel in self.session_channels:
61                    self.session.Unsubscribe(channel, self.update_tree)
62                self.session = None
63            self.app.Unsubscribe(SESSION_CHANGED, self.session_changed)
64            self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)
65    
66      def update_tree(self, *args):      def update_tree(self, *args):
67          """Clear and rebuild the tree"""          """Clear and rebuild the tree"""
68          self.DeleteAllItems()          self.DeleteAllItems()
69          session = self.app.session          session = self.app.session
70          root = self.AddRoot("Session: %s" % session.title)          root = self.AddRoot("Session: %s" % session.title)
71            self.layer_to_item.clear()
72            if session.filename == None:
73                self.AppendItem(root, "Filename:")
74            else:
75                self.AppendItem(root, "Filename: %s" % session.filename)
76            if session.WasModified():
77                self.AppendItem(root, "Modified: yes")
78            else:
79                self.AppendItem(root, "Modified: no")
80    
81          for map in session.Maps():          for map in session.Maps():
82              mapitem = self.AppendItem(root, "Map: %s" % map.title)              mapitem = self.AppendItem(root, "Map: %s" % map.title)
83              self.SetPyData(mapitem, map)              self.SetPyData(mapitem, map)
84                if map.BoundingBox() != None:
85                    self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"
86                                              % map.BoundingBox()))
87              if map.projection and len(map.projection.params) > 0:              if map.projection and len(map.projection.params) > 0:
88                    self.AppendItem(mapitem,
89                                    ("Extent (projected): (%g, %g, %g, %g)"
90                                     % map.ProjectedBoundingBox()))
91                  projectionitem = self.AppendItem(mapitem, "Projection")                  projectionitem = self.AppendItem(mapitem, "Projection")
92                  for param in map.projection.params:                  for param in map.projection.params:
93                      parameteritem = self.AppendItem(projectionitem, str(param))                      parameteritem = self.AppendItem(projectionitem, str(param))
# Line 65  class SessioinTreeCtrl(wxTreeCtrl): Line 101  class SessioinTreeCtrl(wxTreeCtrl):
101                  layeritem = self.AppendItem(mapitem,                  layeritem = self.AppendItem(mapitem,
102                                              "Layer '%s'" % layer.Title(),                                              "Layer '%s'" % layer.Title(),
103                                              data = idata)                                              data = idata)
104                    self.layer_to_item[id(layer)] = layeritem
105                  if layer is self.app.interactor.selected_layer:                  if layer is self.app.interactor.selected_layer:
106                      self.SelectItem(layeritem)                      self.SelectItem(layeritem)
107                  if isinstance(layer, Layer):                  if isinstance(layer, Layer):
# Line 74  class SessioinTreeCtrl(wxTreeCtrl): Line 111  class SessioinTreeCtrl(wxTreeCtrl):
111                          text = "Hidden"                          text = "Hidden"
112                      self.AppendItem(layeritem, text)                      self.AppendItem(layeritem, text)
113                      self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())                      self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())
114                      self.AppendItem(layeritem, ("Extents: (%g, %g, %g, %g)"                      bbox = layer.LatLongBoundingBox()
115                                                  % layer.LatLongBoundingBox()))                      if bbox is not None:
116                            self.AppendItem(layeritem,
117                                            ("Extent (lat-lon): (%g, %g, %g, %g)"
118                                             % bbox))
119                        else:
120                            self.AppendItem(layeritem, ("Extent (lat-lon):"))
121                      self.AppendItem(layeritem,                      self.AppendItem(layeritem,
122                                      "Shapetype: %s"                                      "Shapetype: %s"
123                                      % shapetype_names[layer.ShapeType()])                                      % shapetype_names[layer.ShapeType()])
# Line 88  class SessioinTreeCtrl(wxTreeCtrl): Line 130  class SessioinTreeCtrl(wxTreeCtrl):
130          self.Expand(root)          self.Expand(root)
131    
132      def session_changed(self, *args):      def session_changed(self, *args):
133          for channel in (MAPS_CHANGED,          new_session = self.app.session
134                          MAP_PROJECTION_CHANGED,          # if the session has changed subscribe/unsubscribe
135                          LAYERS_CHANGED,          if self.session is not new_session:
136                          LAYER_LEGEND_CHANGED,              if self.session is not None:
137                          LAYER_VISIBILITY_CHANGED):                  for channel in self.session_channels:
138              self.app.session.Subscribe(channel, self.update_tree)                      self.session.Unsubscribe(channel, self.update_tree)
139                if new_session is not None:
140                    for channel in self.session_channels:
141                        new_session.Subscribe(channel, self.update_tree)
142                self.session = new_session
143          self.update_tree()          self.update_tree()
144    
145      def normalize_selection(self):      def normalize_selection(self):
# Line 125  class SessioinTreeCtrl(wxTreeCtrl): Line 171  class SessioinTreeCtrl(wxTreeCtrl):
171              # self.normalize_selection(). ignore the event.              # self.normalize_selection(). ignore the event.
172              return              return
173          self.normalize_selection()          self.normalize_selection()
174          layer = self.SelectedLayer()          # SelectedLayer returns None if no layer is selected. Since
175          if layer is not None:          # passing None to interactor.SelectLayer deselects the layer we
176              self.app.interactor.SelectLayer(layer)          # can simply pass the result of SelectedLayer on in all cases
177            self.app.interactor.SelectLayer(self.SelectedLayer())
178    
179      def layer_selected(self, layer):      def layer_selected(self, layer):
180          pass          item = self.layer_to_item.get(id(layer))
181            if item is not None and item != self.GetSelection():
182                self.SelectItem(item)
183    
184    
185  class SessionTreeView(NonModalDialog):  class SessionTreeView(NonModalDialog):
# Line 139  class SessionTreeView(NonModalDialog): Line 188  class SessionTreeView(NonModalDialog):
188    
189      def __init__(self, parent, app, name):      def __init__(self, parent, app, name):
190          NonModalDialog.__init__(self, parent, app.interactor, name, "Session")          NonModalDialog.__init__(self, parent, app.interactor, name, "Session")
191          self.tree = SessioinTreeCtrl(self, -1, app)          self.tree = SessionTreeCtrl(self, -1, app)
192    
193      def OnClose(self, event):      def OnClose(self, event):
194          #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)          #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)
195          NonModalDialog.OnClose(self, event)          NonModalDialog.OnClose(self, event)
196    
197            # if there were a way to get notified when the tree control
198            # itself is destroyed we could use that to unsubscribe instead
199            # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
200            # all)
201            self.tree.unsubscribe_all()
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