/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tree.py
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revision 198 by jan, Thu Jun 20 15:24:26 2002 UTC revision 218 by bh, Thu Jul 18 12:54:48 2002 UTC
# Line 9  Line 9 
9    
10  __version__ = "$Revision$"  __version__ = "$Revision$"
11    
12    from types import StringType
13    
14  from wxPython.wx import *  from wxPython.wx import *
15    
16  from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \  from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \
# Line 20  from Thuban.Model.map import Map Line 22  from Thuban.Model.map import Map
22  from dialogs import NonModalDialog  from dialogs import NonModalDialog
23  from messages import SESSION_CHANGED, SELECTED_LAYER  from messages import SESSION_CHANGED, SELECTED_LAYER
24    
 def color_string(color):  
     if color is None:  
         return "None"  
     return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)  
   
25    
26  class SessionTreeCtrl(wxTreeCtrl):  class SessionTreeCtrl(wxTreeCtrl):
27    
28        """Widget to display a tree view of the session.
29    
30        The tree view is created recursively from the session object. The
31        tree view calls the session's TreeInfo method which should return a
32        pair (<title>, <item>) where <title> ist the title of the session
33        item in the tree view and <items> is a list of objects to use as the
34        children of the session in the tree view.
35    
36        The items list can contain three types of items:
37    
38           1. a string. The string is used as the title for a leaf item in
39              the tree view.
40    
41           2. an object with a TreeInfo method. This method is called and
42              should return a pair just like the session's TreeInfo method.
43    
44           3. a pair (<title>, <item>) which is treated like the return
45              value of TreeInfo.
46        """
47    
48      # the session channels to subscribe to update the tree      # the session channels to subscribe to update the tree
49      session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,      session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,
50                          LAYERS_CHANGED, LAYER_LEGEND_CHANGED,                          LAYERS_CHANGED, LAYER_LEGEND_CHANGED,
# Line 68  class SessionTreeCtrl(wxTreeCtrl): Line 85  class SessionTreeCtrl(wxTreeCtrl):
85      def update_tree(self, *args):      def update_tree(self, *args):
86          """Clear and rebuild the tree"""          """Clear and rebuild the tree"""
87          self.DeleteAllItems()          self.DeleteAllItems()
         session = self.app.session  
         root = self.AddRoot("Session: %s" % session.title)  
88          self.layer_to_item.clear()          self.layer_to_item.clear()
         if session.filename == None:  
             self.AppendItem(root, "Filename:")  
         else:  
             self.AppendItem(root, "Filename: %s" % session.filename)  
         if session.WasModified():  
             self.AppendItem(root, "Modified: yes")  
         else:  
             self.AppendItem(root, "Modified: no")  
   
         for map in session.Maps():  
             mapitem = self.AppendItem(root, "Map: %s" % map.title)  
             self.SetPyData(mapitem, map)  
             if map.BoundingBox() != None:  
                 self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"  
                                           % map.BoundingBox()))  
             if map.projection and len(map.projection.params) > 0:  
                 self.AppendItem(mapitem,  
                                 ("Extent (projected): (%g, %g, %g, %g)"  
                                  % map.ProjectedBoundingBox()))  
                 projectionitem = self.AppendItem(mapitem, "Projection")  
                 for param in map.projection.params:  
                     parameteritem = self.AppendItem(projectionitem, str(param))  
                 self.Expand(projectionitem)  
   
             layers = map.Layers()  
             for layer_index in range(len(layers) - 1, -1, -1):  
                 layer = layers[layer_index]  
                 idata = wxTreeItemData()  
                 idata.SetData(layer)  
                 layeritem = self.AppendItem(mapitem,  
                                             "Layer '%s'" % layer.Title(),  
                                             data = idata)  
                 self.layer_to_item[id(layer)] = layeritem  
                 if layer is self.app.interactor.selected_layer:  
                     self.SelectItem(layeritem)  
                 if isinstance(layer, Layer):  
                     if layer.Visible():  
                         text = "Shown"  
                     else:  
                         text = "Hidden"  
                     self.AppendItem(layeritem, text)  
                     self.AppendItem(layeritem, "Shapes: %d" %layer.NumShapes())  
                     bbox = layer.LatLongBoundingBox()  
                     if bbox is not None:  
                         self.AppendItem(layeritem,  
                                         ("Extent (lat-lon): (%g, %g, %g, %g)"  
                                          % bbox))  
                     else:  
                         self.AppendItem(layeritem, ("Extent (lat-lon):"))  
                     self.AppendItem(layeritem,  
                                     "Shapetype: %s"  
                                     % shapetype_names[layer.ShapeType()])  
                     self.AppendItem(layeritem,  
                                     "Fill: " + color_string(layer.fill))  
                     self.AppendItem(layeritem,  
                                     "Outline: " + color_string(layer.stroke))  
                 self.Expand(layeritem)  
             self.Expand(mapitem)  
         self.Expand(root)  
   
         for extension in session.Extensions():  
             extensionitem = self.AppendItem(root, "Extension: %s" %  
                                             extension.title)  
             for object in extension.Objects():  
                 objectitem = self.AppendItem(extensionitem, "%s: %s" %  
                                              (object.title, object.name))  
             self.Expand(extensionitem)  
89    
90            session = self.app.session
91            info = session.TreeInfo()
92            root = self.AddRoot(info[0])
93            self.add_items(root, info[1])
94            self.Expand(root)
95            # select the selected layer
96            selected_layer = self.app.interactor.selected_layer
97            if selected_layer is not None:
98                # One would expect that the selected_layer's id is in
99                # layer_to_item at this point as we've just rebuilt that
100                # mapping completely. However, when a new session is loaded
101                # for instance, it can happen that the tree view is updated
102                # before the interactor in which case selected_layer may be
103                # a layer of the old session.
104                item = self.layer_to_item.get(id(selected_layer))
105                if item is not None:
106                    self.SelectItem(item)
107    
108        def add_items(self, parent, items):
109            for item in items:
110                if hasattr(item, "TreeInfo"):
111                    # Supports the TreeInfo protocol
112                    info = item.TreeInfo()
113                    treeitem = self.AppendItem(parent, info[0])
114                    self.SetPyData(treeitem, item)
115                    self.add_items(treeitem, info[1])
116                    self.Expand(treeitem)
117                    if isinstance(item, Layer):
118                        self.layer_to_item[id(item)] = treeitem
119                elif isinstance(item, StringType):
120                    # it's a string
121                    # FIXME: What to do about UNICODE
122                    self.AppendItem(parent, item)
123                else:
124                    # assume its a sequence (title, items)
125                    treeitem = self.AppendItem(parent, item[0])
126                    self.add_items(treeitem, item[1])
127                    self.Expand(treeitem)
128    
129      def session_changed(self, *args):      def session_changed(self, *args):
130          new_session = self.app.session          new_session = self.app.session
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