/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tree.py
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revision 177 by bh, Wed May 15 14:02:09 2002 UTC revision 504 by jonathan, Mon Mar 10 15:12:24 2003 UTC
# Line 9  Line 9 
9    
10  __version__ = "$Revision$"  __version__ = "$Revision$"
11    
12    from types import StringType, UnicodeType
13    
14  from wxPython.wx import *  from wxPython.wx import *
15    
16  from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \  from Thuban import _
17       LAYERS_CHANGED, LAYER_LEGEND_CHANGED, LAYER_VISIBILITY_CHANGED  from Thuban.UI.common import *
18  from Thuban.Model.layer import Layer, shapetype_names  
19    from Thuban.Model.color import Color
20    
21    from Thuban.Model.messages import CHANGED
22    from Thuban.Model.layer import Layer
23  from Thuban.Model.map import Map  from Thuban.Model.map import Map
24    
25  from dialogs import NonModalDialog  from dialogs import NonModalDialog
26  from messages import SESSION_CHANGED, SELECTED_LAYER  from messages import SESSION_REPLACED, SELECTED_LAYER
   
 def color_string(color):  
     if color is None:  
         return "None"  
     return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)  
27    
28    BMP_SIZE = 15
29    
30  class SessionTreeCtrl(wxTreeCtrl):  class SessionTreeCtrl(wxTreeCtrl):
31    
32      # the session channels to subscribe to to update the tree      """Widget to display a tree view of the session.
33      session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,  
34                          LAYERS_CHANGED, LAYER_LEGEND_CHANGED,      The tree view is created recursively from the session object. The
35                          LAYER_VISIBILITY_CHANGED)      tree view calls the session's TreeInfo method which should return a
36        pair (<title>, <item>) where <title> ist the title of the session
37        item in the tree view and <items> is a list of objects to use as the
38        children of the session in the tree view.
39    
40        The items list can contain three types of items:
41    
42           1. a string. The string is used as the title for a leaf item in
43              the tree view.
44    
45           2. an object with a TreeInfo method. This method is called and
46              should return a pair just like the session's TreeInfo method.
47    
48           3. a pair (<title>, <item>) which is treated like the return
49              value of TreeInfo.
50        """
51    
52      def __init__(self, parent, ID, app):      def __init__(self, parent, ID, app):
53    
54          # 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.
55          wxTreeCtrl.__init__(self, parent, ID)          wxTreeCtrl.__init__(self, parent, ID)
56    
# Line 44  class SessionTreeCtrl(wxTreeCtrl): Line 62  class SessionTreeCtrl(wxTreeCtrl):
62          # Dictionary mapping layer id's to tree items          # Dictionary mapping layer id's to tree items
63          self.layer_to_item = {}          self.layer_to_item = {}
64    
65          self.app.Subscribe(SESSION_CHANGED, self.session_changed)          self.app.Subscribe(SESSION_REPLACED, self.session_changed)
66          self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)          self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)
67    
68          # the session currently displayed in the tree          # the session currently displayed in the tree
69          self.session = None          self.session = None
70    
71            self.image_list = wxImageList(BMP_SIZE, BMP_SIZE)
72            self.AssignImageList(self.image_list)
73    
74          # pretend the session has changed to build the initial tree          # pretend the session has changed to build the initial tree
75          self.session_changed()          self.session_changed()
76    
# Line 57  class SessionTreeCtrl(wxTreeCtrl): Line 78  class SessionTreeCtrl(wxTreeCtrl):
78    
79      def unsubscribe_all(self):      def unsubscribe_all(self):
80          if self.session is not None:          if self.session is not None:
81              for channel in self.session_channels:              self.session.Unsubscribe(CHANGED, self.update_tree)
                 self.session.Unsubscribe(channel, self.update_tree)  
82              self.session = None              self.session = None
83          self.app.Unsubscribe(SESSION_CHANGED, self.session_changed)          self.app.Unsubscribe(SESSION_REPLACED, self.session_changed)
84          self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)          self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)
85    
86      def update_tree(self, *args):      def update_tree(self, *args):
87          """Clear and rebuild the tree"""          """Clear and rebuild the tree"""
88          self.DeleteAllItems()          self.DeleteAllItems()
         session = self.app.session  
         root = self.AddRoot("Session: %s" % session.title)  
89          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")  
90    
91          for map in session.Maps():          session = self.app.session
92              mapitem = self.AppendItem(root, "Map: %s" % map.title)          info = session.TreeInfo()
93              self.SetPyData(mapitem, map)          root = self.AddRoot(info[0])
94              if map.BoundingBox() != None:          self.add_items(root, info[1])
                 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)  
95          self.Expand(root)          self.Expand(root)
96            # select the selected layer
97            selected_layer = self.app.interactor.selected_layer
98            if selected_layer is not None:
99                # One would expect that the selected_layer's id is in
100                # layer_to_item at this point as we've just rebuilt that
101                # mapping completely. However, when a new session is loaded
102                # for instance, it can happen that the tree view is updated
103                # before the interactor in which case selected_layer may be
104                # a layer of the old session.
105                item = self.layer_to_item.get(id(selected_layer))
106                if item is not None:
107                    self.SelectItem(item)
108    
109        def add_items(self, parent, items):
110    
111            if items is None: return
112    
113            for item in items:
114                if hasattr(item, "TreeInfo"):
115                    # Supports the TreeInfo protocol
116                    info = item.TreeInfo()
117                    treeitem = self.AppendItem(parent, info[0])
118                    self.SetPyData(treeitem, item)
119                    self.add_items(treeitem, info[1])
120                    self.Expand(treeitem)
121                    if isinstance(item, Layer):
122                        self.layer_to_item[id(item)] = treeitem
123                elif isinstance(item, StringType) or \
124                     isinstance(item, UnicodeType):
125                    # it's a string
126                    self.AppendItem(parent, item)
127                else:
128                    # assume its a sequence (title, items)
129                    if isinstance(item[1], Color):
130    
131                        treeitem = self.AppendItem(parent, "(%s)" % item[0])
132    
133                        bmp = wxEmptyBitmap(BMP_SIZE, BMP_SIZE)
134                        brush = wxBrush(Color2wxColour(item[1]), wxSOLID)
135                        dc = wxMemoryDC()
136                        dc.SelectObject(bmp)
137                        dc.SetBrush(brush)
138                        dc.Clear()
139                        dc.DrawRoundedRectangle(0, 0,
140                                                bmp.GetWidth(), bmp.GetHeight(),
141                                                4)
142                        dc.SelectObject(wxNullBitmap)
143    
144                        i = self.image_list.Add(bmp)
145                        self.SetItemImage(treeitem, i)
146                    else:
147                        treeitem = self.AppendItem(parent, item[0])
148                        self.add_items(treeitem, item[1])
149                    self.Expand(treeitem)
150    
151      def session_changed(self, *args):      def session_changed(self, *args):
152          new_session = self.app.session          new_session = self.app.session
153          # if the session has changed subscribe/unsubscribe          # if the session has changed subscribe/unsubscribe
154          if self.session is not new_session:          if self.session is not new_session:
155              if self.session is not None:              if self.session is not None:
156                  for channel in self.session_channels:                  self.session.Unsubscribe(CHANGED, self.update_tree)
                     self.session.Unsubscribe(channel, self.update_tree)  
157              if new_session is not None:              if new_session is not None:
158                  for channel in self.session_channels:                  new_session.Subscribe(CHANGED, self.update_tree)
                     new_session.Subscribe(channel, self.update_tree)  
159              self.session = new_session              self.session = new_session
160          self.update_tree()          self.update_tree()
161    
# Line 150  class SessionTreeCtrl(wxTreeCtrl): Line 167  class SessionTreeCtrl(wxTreeCtrl):
167              if isinstance(object, Layer) or isinstance(object, Map):              if isinstance(object, Layer) or isinstance(object, Map):
168                  break                  break
169              item = self.GetItemParent(item)              item = self.GetItemParent(item)
170            else:
171                # No layer or map was found in the chain of parents, so
172                # there's nothing we can do.
173                return
174    
175          self.changing_selection = 1          self.changing_selection = 1
176          try:          try:
# Line 187  class SessionTreeView(NonModalDialog): Line 208  class SessionTreeView(NonModalDialog):
208      """Non modal dialog showing the session as a tree"""      """Non modal dialog showing the session as a tree"""
209    
210      def __init__(self, parent, app, name):      def __init__(self, parent, app, name):
211          NonModalDialog.__init__(self, parent, app.interactor, name, "Session")          NonModalDialog.__init__(self, parent, app.interactor, name,
212                                    _("Session"))
213          self.tree = SessionTreeCtrl(self, -1, app)          self.tree = SessionTreeCtrl(self, -1, app)
214    
215      def OnClose(self, event):      def OnClose(self, event):
         #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)  
216          NonModalDialog.OnClose(self, event)          NonModalDialog.OnClose(self, event)
217    
218          # if there were a way to get notified when the tree control          # if there were a way to get notified when the tree control
# Line 199  class SessionTreeView(NonModalDialog): Line 220  class SessionTreeView(NonModalDialog):
220          # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at          # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
221          # all)          # all)
222          self.tree.unsubscribe_all()          self.tree.unsubscribe_all()
223    
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