/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tree.py
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revision 217 by bh, Wed Jul 17 10:50:40 2002 UTC revision 443 by jonathan, Thu Feb 27 15:55:42 2003 UTC
# Line 9  Line 9 
9    
10  __version__ = "$Revision$"  __version__ = "$Revision$"
11    
12  from types import StringType  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       EXTENSIONS_CHANGED, EXTENSION_OBJECTS_CHANGED  
19  from Thuban.Model.layer import Layer, shapetype_names  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_CHANGED, SELECTED_LAYER
27    
28    BMP_SIZE = 15
29    
30  class SessionTreeCtrl(wxTreeCtrl):  class SessionTreeCtrl(wxTreeCtrl):
31    
# Line 45  class SessionTreeCtrl(wxTreeCtrl): Line 49  class SessionTreeCtrl(wxTreeCtrl):
49            value of TreeInfo.            value of TreeInfo.
50      """      """
51    
     # the session channels to subscribe to update the tree  
     session_channels = (MAPS_CHANGED, MAP_PROJECTION_CHANGED,  
                         LAYERS_CHANGED, LAYER_LEGEND_CHANGED,  
                         LAYER_VISIBILITY_CHANGED, EXTENSIONS_CHANGED,  
                         EXTENSION_OBJECTS_CHANGED)  
   
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 69  class SessionTreeCtrl(wxTreeCtrl): Line 68  class SessionTreeCtrl(wxTreeCtrl):
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 76  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_CHANGED, self.session_changed)
84          self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)          self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)
# Line 95  class SessionTreeCtrl(wxTreeCtrl): Line 96  class SessionTreeCtrl(wxTreeCtrl):
96          # select the selected layer          # select the selected layer
97          selected_layer = self.app.interactor.selected_layer          selected_layer = self.app.interactor.selected_layer
98          if selected_layer is not None:          if selected_layer is not None:
99              self.SelectItem(self.layer_to_item[id(selected_layer)])              # 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):      def add_items(self, parent, items):
110    
111            if items is None: return
112    
113          for item in items:          for item in items:
114              if hasattr(item, "TreeInfo"):              if hasattr(item, "TreeInfo"):
115                  # Supports the TreeInfo protocol                  # Supports the TreeInfo protocol
# Line 108  class SessionTreeCtrl(wxTreeCtrl): Line 120  class SessionTreeCtrl(wxTreeCtrl):
120                  self.Expand(treeitem)                  self.Expand(treeitem)
121                  if isinstance(item, Layer):                  if isinstance(item, Layer):
122                      self.layer_to_item[id(item)] = treeitem                      self.layer_to_item[id(item)] = treeitem
123              elif isinstance(item, StringType):              elif isinstance(item, StringType) or \
124                     isinstance(item, UnicodeType):
125                  # it's a string                  # it's a string
                 # FIXME: What to do about UNICODE  
126                  self.AppendItem(parent, item)                  self.AppendItem(parent, item)
127              else:              else:
128                  # assume its a sequence (title, items)                  # assume its a sequence (title, items)
129                  treeitem = self.AppendItem(parent, item[0])                  if isinstance(item[1], Color):
130                  self.add_items(treeitem, item[1])  
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)                  self.Expand(treeitem)
150    
151      def session_changed(self, *args):      def session_changed(self, *args):
# Line 123  class SessionTreeCtrl(wxTreeCtrl): Line 153  class SessionTreeCtrl(wxTreeCtrl):
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 139  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 176  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):
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