/[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 521 by jonathan, Wed Mar 12 13:18:50 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    
72          # pretend the session has changed to build the initial tree          # pretend the session has changed to build the initial tree
73          self.session_changed()          self.session_changed()
74    
# Line 57  class SessionTreeCtrl(wxTreeCtrl): Line 76  class SessionTreeCtrl(wxTreeCtrl):
76    
77      def unsubscribe_all(self):      def unsubscribe_all(self):
78          if self.session is not None:          if self.session is not None:
79              for channel in self.session_channels:              self.session.Unsubscribe(CHANGED, self.update_tree)
                 self.session.Unsubscribe(channel, self.update_tree)  
80              self.session = None              self.session = None
81          self.app.Unsubscribe(SESSION_CHANGED, self.session_changed)          self.app.Unsubscribe(SESSION_REPLACED, self.session_changed)
82          self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)          self.app.interactor.Unsubscribe(SELECTED_LAYER, self.layer_selected)
83    
84      def update_tree(self, *args):      def update_tree(self, *args):
85          """Clear and rebuild the tree"""          """Clear and rebuild the tree"""
86          self.DeleteAllItems()          self.DeleteAllItems()
         session = self.app.session  
         root = self.AddRoot("Session: %s" % session.title)  
87          self.layer_to_item.clear()          self.layer_to_item.clear()
88          if session.filename == None:          self.image_list = wxImageList(BMP_SIZE, BMP_SIZE, False, 0)
89              self.AppendItem(root, "Filename:")  
90          else:          bmp = wxEmptyBitmap(BMP_SIZE, BMP_SIZE)
91              self.AppendItem(root, "Filename: %s" % session.filename)          dc = wxMemoryDC()
92          if session.WasModified():          dc.SelectObject(bmp)
93              self.AppendItem(root, "Modified: yes")          dc.SetBrush(wxBLACK_BRUSH)
94          else:          dc.Clear()
95              self.AppendItem(root, "Modified: no")          dc.SelectObject(wxNullBitmap)
96    
97            self.emptyImageIndex = \
98                self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
99    
100          for map in session.Maps():          self.AssignImageList(self.image_list)
101              mapitem = self.AppendItem(root, "Map: %s" % map.title)  
102              self.SetPyData(mapitem, map)          session = self.app.session
103              if map.BoundingBox() != None:          info = session.TreeInfo()
104                  self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"          root = self.AddRoot(info[0], -1, -1, None)
105                                            % map.BoundingBox()))          self.SetItemImage(root, self.emptyImageIndex)
106              if map.projection and len(map.projection.params) > 0:          self.add_items(root, info[1])
                 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)  
107          self.Expand(root)          self.Expand(root)
108            # select the selected layer
109            selected_layer = self.app.interactor.selected_layer
110            if selected_layer is not None:
111                # One would expect that the selected_layer's id is in
112                # layer_to_item at this point as we've just rebuilt that
113                # mapping completely. However, when a new session is loaded
114                # for instance, it can happen that the tree view is updated
115                # before the interactor in which case selected_layer may be
116                # a layer of the old session.
117                item = self.layer_to_item.get(id(selected_layer))
118                if item is not None:
119                    self.SelectItem(item)
120    
121        def add_items(self, parent, items):
122    
123            if items is None: return
124    
125            for item in items:
126                if hasattr(item, "TreeInfo"):
127                    # Supports the TreeInfo protocol
128                    info = item.TreeInfo()
129                    treeitem = self.AppendItem(parent, info[0], -1, -1, None)
130                    self.SetItemImage(treeitem, self.emptyImageIndex)
131                    self.SetPyData(treeitem, item)
132                    self.add_items(treeitem, info[1])
133                    self.Expand(treeitem)
134                    if isinstance(item, Layer):
135                        self.layer_to_item[id(item)] = treeitem
136                elif isinstance(item, StringType) or \
137                     isinstance(item, UnicodeType):
138                    # it's a string
139                    treeitem = self.AppendItem(parent, item, -1, -1, None)
140                    self.SetItemImage(treeitem, self.emptyImageIndex)
141                else:
142                    # assume its a sequence (title, items)
143                    if isinstance(item[1], Color):
144    
145                        treeitem = self.AppendItem(parent, "(%s)" % item[0])
146    
147                        bmp = wxEmptyBitmap(BMP_SIZE, BMP_SIZE)
148                        brush = wxBrush(Color2wxColour(item[1]), wxSOLID)
149                        dc = wxMemoryDC()
150                        dc.SelectObject(bmp)
151                        dc.SetBrush(brush)
152                        dc.Clear()
153                        dc.DrawRoundedRectangle(0, 0,
154                                                bmp.GetWidth(), bmp.GetHeight(),
155                                                4)
156                        dc.SelectObject(wxNullBitmap)
157    
158                        i = self.image_list.Add(bmp)
159                        self.SetItemImage(treeitem, i)
160                    else:
161                        treeitem = self.AppendItem(parent, item[0], -1, -1, None)
162                        self.SetItemImage(treeitem, self.emptyImageIndex)
163                        self.add_items(treeitem, item[1])
164                    self.Expand(treeitem)
165    
166      def session_changed(self, *args):      def session_changed(self, *args):
167          new_session = self.app.session          new_session = self.app.session
168          # if the session has changed subscribe/unsubscribe          # if the session has changed subscribe/unsubscribe
169          if self.session is not new_session:          if self.session is not new_session:
170              if self.session is not None:              if self.session is not None:
171                  for channel in self.session_channels:                  self.session.Unsubscribe(CHANGED, self.update_tree)
                     self.session.Unsubscribe(channel, self.update_tree)  
172              if new_session is not None:              if new_session is not None:
173                  for channel in self.session_channels:                  new_session.Subscribe(CHANGED, self.update_tree)
                     new_session.Subscribe(channel, self.update_tree)  
174              self.session = new_session              self.session = new_session
175          self.update_tree()          self.update_tree()
176    
# Line 150  class SessionTreeCtrl(wxTreeCtrl): Line 182  class SessionTreeCtrl(wxTreeCtrl):
182              if isinstance(object, Layer) or isinstance(object, Map):              if isinstance(object, Layer) or isinstance(object, Map):
183                  break                  break
184              item = self.GetItemParent(item)              item = self.GetItemParent(item)
185            else:
186                # No layer or map was found in the chain of parents, so
187                # there's nothing we can do.
188                return
189    
190          self.changing_selection = 1          self.changing_selection = 1
191          try:          try:
# Line 187  class SessionTreeView(NonModalDialog): Line 223  class SessionTreeView(NonModalDialog):
223      """Non modal dialog showing the session as a tree"""      """Non modal dialog showing the session as a tree"""
224    
225      def __init__(self, parent, app, name):      def __init__(self, parent, app, name):
226          NonModalDialog.__init__(self, parent, app.interactor, name, "Session")          NonModalDialog.__init__(self, parent, app.interactor, name,
227                                    _("Session"))
228          self.tree = SessionTreeCtrl(self, -1, app)          self.tree = SessionTreeCtrl(self, -1, app)
229    
230      def OnClose(self, event):      def OnClose(self, event):
         #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)  
231          NonModalDialog.OnClose(self, event)          NonModalDialog.OnClose(self, event)
232    
233          # 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 235  class SessionTreeView(NonModalDialog):
235          # 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
236          # all)          # all)
237          self.tree.unsubscribe_all()          self.tree.unsubscribe_all()
238    
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