/[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 510 by jonathan, Tue Mar 11 16:05:18 2003 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 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
27    
28    BMP_SIZE = 15
29    
30    class SessionTreeCtrl(wxTreeCtrl):
31    
32  def color_string(color):      """Widget to display a tree view of the session.
     if color is None:  
         return "None"  
     return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)  
33    
34        The tree view is created recursively from the session object. The
35        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  class SessioinTreeCtrl(wxTreeCtrl):      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 36  class SessioinTreeCtrl(wxTreeCtrl): Line 59  class SessioinTreeCtrl(wxTreeCtrl):
59          # so that we can ignore the selection events generated          # so that we can ignore the selection events generated
60          self.changing_selection = 0          self.changing_selection = 0
61    
62          self.app.Subscribe(SESSION_CHANGED, self.session_changed)          # Dictionary mapping layer id's to tree items
63            self.layer_to_item = {}
64    
65            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
69            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    
75          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
76    
77        def unsubscribe_all(self):
78            if self.session is not None:
79                self.session.Unsubscribe(CHANGED, self.update_tree)
80                self.session = None
81            self.app.Unsubscribe(SESSION_REPLACED, self.session_changed)
82            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()
87            self.layer_to_item.clear()
88            self.image_list = wxImageList(BMP_SIZE, BMP_SIZE, False, 0)
89            self.AssignImageList(self.image_list)
90            #bmp = wxEmptyBitmap(BMP_SIZE, BMP_SIZE)
91            #self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
92    
93          session = self.app.session          session = self.app.session
94          root = self.AddRoot("Session: %s" % session.title)          info = session.TreeInfo()
95          for map in session.Maps():          root = self.AddRoot(info[0], -2, -1, None)
96              mapitem = self.AppendItem(root, "Map: %s" % map.title)          self.add_items(root, info[1])
             self.SetPyData(mapitem, map)  
             if map.projection and len(map.projection.params) > 0:  
                 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)  
                 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())  
                     self.AppendItem(layeritem, ("Extents: (%g, %g, %g, %g)"  
                                                 % layer.LatLongBoundingBox()))  
                     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)  
97          self.Expand(root)          self.Expand(root)
98            # select the selected layer
99            selected_layer = self.app.interactor.selected_layer
100            if selected_layer is not None:
101                # One would expect that the selected_layer's id is in
102                # layer_to_item at this point as we've just rebuilt that
103                # mapping completely. However, when a new session is loaded
104                # for instance, it can happen that the tree view is updated
105                # before the interactor in which case selected_layer may be
106                # a layer of the old session.
107                item = self.layer_to_item.get(id(selected_layer))
108                if item is not None:
109                    self.SelectItem(item)
110    
111        def add_items(self, parent, items):
112    
113            if items is None: return
114    
115            for item in items:
116                if hasattr(item, "TreeInfo"):
117                    # Supports the TreeInfo protocol
118                    info = item.TreeInfo()
119                    #treeitem = self.AppendItem(parent, info[0])
120                    treeitem = self.AppendItem(parent, info[0], -2, -1, None)
121                    self.SetPyData(treeitem, item)
122                    self.add_items(treeitem, info[1])
123                    self.Expand(treeitem)
124                    if isinstance(item, Layer):
125                        self.layer_to_item[id(item)] = treeitem
126                elif isinstance(item, StringType) or \
127                     isinstance(item, UnicodeType):
128                    # it's a string
129                    treeitem = self.AppendItem(parent, item, -2, -1, None)
130                    #self.SetItemImage(treeitem, -1)
131                else:
132                    # assume its a sequence (title, items)
133                    if isinstance(item[1], Color):
134    
135                        treeitem = self.AppendItem(parent, "(%s)" % item[0])
136    
137                        bmp = wxEmptyBitmap(BMP_SIZE, BMP_SIZE)
138                        brush = wxBrush(Color2wxColour(item[1]), wxSOLID)
139                        dc = wxMemoryDC()
140                        dc.SelectObject(bmp)
141                        dc.SetBrush(brush)
142                        dc.Clear()
143                        dc.DrawRoundedRectangle(0, 0,
144                                                bmp.GetWidth(), bmp.GetHeight(),
145                                                4)
146                        dc.SelectObject(wxNullBitmap)
147    
148                        i = self.image_list.Add(bmp)
149                        self.SetItemImage(treeitem, i)
150                    else:
151                        #treeitem = self.AppendItem(parent, item[0])
152                        treeitem = self.AppendItem(parent, item[0], -2, -1, None)
153                        self.add_items(treeitem, item[1])
154                    self.Expand(treeitem)
155    
156      def session_changed(self, *args):      def session_changed(self, *args):
157          for channel in (MAPS_CHANGED,          new_session = self.app.session
158                          MAP_PROJECTION_CHANGED,          # if the session has changed subscribe/unsubscribe
159                          LAYERS_CHANGED,          if self.session is not new_session:
160                          LAYER_LEGEND_CHANGED,              if self.session is not None:
161                          LAYER_VISIBILITY_CHANGED):                  self.session.Unsubscribe(CHANGED, self.update_tree)
162              self.app.session.Subscribe(channel, self.update_tree)              if new_session is not None:
163                    new_session.Subscribe(CHANGED, self.update_tree)
164                self.session = new_session
165          self.update_tree()          self.update_tree()
166    
167      def normalize_selection(self):      def normalize_selection(self):
# Line 104  class SessioinTreeCtrl(wxTreeCtrl): Line 172  class SessioinTreeCtrl(wxTreeCtrl):
172              if isinstance(object, Layer) or isinstance(object, Map):              if isinstance(object, Layer) or isinstance(object, Map):
173                  break                  break
174              item = self.GetItemParent(item)              item = self.GetItemParent(item)
175            else:
176                # No layer or map was found in the chain of parents, so
177                # there's nothing we can do.
178                return
179    
180          self.changing_selection = 1          self.changing_selection = 1
181          try:          try:
# Line 125  class SessioinTreeCtrl(wxTreeCtrl): Line 197  class SessioinTreeCtrl(wxTreeCtrl):
197              # self.normalize_selection(). ignore the event.              # self.normalize_selection(). ignore the event.
198              return              return
199          self.normalize_selection()          self.normalize_selection()
200          layer = self.SelectedLayer()          # SelectedLayer returns None if no layer is selected. Since
201          if layer is not None:          # passing None to interactor.SelectLayer deselects the layer we
202              self.app.interactor.SelectLayer(layer)          # can simply pass the result of SelectedLayer on in all cases
203            self.app.interactor.SelectLayer(self.SelectedLayer())
204    
205      def layer_selected(self, layer):      def layer_selected(self, layer):
206          pass          item = self.layer_to_item.get(id(layer))
207            if item is not None and item != self.GetSelection():
208                self.SelectItem(item)
209    
210    
211  class SessionTreeView(NonModalDialog):  class SessionTreeView(NonModalDialog):
# Line 138  class SessionTreeView(NonModalDialog): Line 213  class SessionTreeView(NonModalDialog):
213      """Non modal dialog showing the session as a tree"""      """Non modal dialog showing the session as a tree"""
214    
215      def __init__(self, parent, app, name):      def __init__(self, parent, app, name):
216          NonModalDialog.__init__(self, parent, app.interactor, name, "Session")          NonModalDialog.__init__(self, parent, app.interactor, name,
217          self.tree = SessioinTreeCtrl(self, -1, app)                                  _("Session"))
218            self.tree = SessionTreeCtrl(self, -1, app)
219    
220      def OnClose(self, event):      def OnClose(self, event):
         #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)  
221          NonModalDialog.OnClose(self, event)          NonModalDialog.OnClose(self, event)
222    
223            # if there were a way to get notified when the tree control
224            # itself is destroyed we could use that to unsubscribe instead
225            # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
226            # all)
227            self.tree.unsubscribe_all()
228    
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