/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tree.py
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revision 111 by jan, Sun Apr 21 17:29:50 2002 UTC revision 882 by jonathan, Fri May 9 16:34:28 2003 UTC
# Line 1  Line 1 
1  #! /usr/bin/python  #! /usr/bin/python
2  # Copyright (c) 2001 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 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 Color2wxColour
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, LAYER_SELECTED
   
 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      def __init__(self, parent, ID, app):      """Widget to display a tree view of the session.
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        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, mainwindow, 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    
57            self.mainwindow = mainwindow
58          self.app = app          self.app = app
59          # boolean to indicate that we manipulate the selection ourselves          # boolean to indicate that we manipulate the selection ourselves
60          # so that we can ignore the selection events generated          # so that we can ignore the selection events generated
# Line 39  class SessionTreeCtrl(wxTreeCtrl): Line 63  class SessionTreeCtrl(wxTreeCtrl):
63          # Dictionary mapping layer id's to tree items          # Dictionary mapping layer id's to tree items
64          self.layer_to_item = {}          self.layer_to_item = {}
65    
66          self.app.Subscribe(SESSION_CHANGED, self.session_changed)          self.app.Subscribe(SESSION_REPLACED, self.session_changed)
67          self.app.interactor.Subscribe(SELECTED_LAYER, self.layer_selected)          self.mainwindow.Subscribe(LAYER_SELECTED, self.layer_selected)
68    
69            # the session currently displayed in the tree
70            self.session = None
71    
72    
73          # pretend the session has changed to build the initial tree          # pretend the session has changed to build the initial tree
74          self.session_changed()          self.session_changed()
75    
76          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)          EVT_TREE_SEL_CHANGED(self, self.GetId(), self.OnSelChanged)
77    
78        def unsubscribe_all(self):
79            if self.session is not None:
80                self.session.Unsubscribe(CHANGED, self.update_tree)
81                self.session = None
82            self.app.Unsubscribe(SESSION_REPLACED, self.session_changed)
83            self.mainwindow.Unsubscribe(LAYER_SELECTED, self.layer_selected)
84    
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()
89          if session.filename == None:          self.image_list = wxImageList(BMP_SIZE, BMP_SIZE, False, 0)
90              self.AppendItem(root, "Filename:")  
91          else:          bmp = wxEmptyBitmap(BMP_SIZE, BMP_SIZE)
92              self.AppendItem(root, "Filename: %s" % session.filename)          dc = wxMemoryDC()
93          if session.WasModified():          dc.SelectObject(bmp)
94              self.AppendItem(root, "Modified: yes")          dc.SetBrush(wxBLACK_BRUSH)
95          else:          dc.Clear()
96              self.AppendItem(root, "Modified: no")          dc.SelectObject(wxNullBitmap)
97    
98          for map in session.Maps():          self.emptyImageIndex = \
99              mapitem = self.AppendItem(root, "Map: %s" % map.title)              self.image_list.AddWithColourMask(bmp, wxColour(0, 0, 0))
100              self.SetPyData(mapitem, map)  
101              self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"          self.AssignImageList(self.image_list)
102                                        % map.BoundingBox()))  
103              if map.projection and len(map.projection.params) > 0:          session = self.app.session
104                  self.AppendItem(mapitem,          info = session.TreeInfo()
105                                  ("Extent (projected): (%g, %g, %g, %g)"          root = self.AddRoot(info[0], -1, -1, None)
106                                   % map.ProjectedBoundingBox()))          self.SetItemImage(root, self.emptyImageIndex)
107                  projectionitem = self.AppendItem(mapitem, "Projection")          self.add_items(root, info[1])
                 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())  
                     self.AppendItem(layeritem,  
                                     ("Extent (lat-lon): (%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)  
108          self.Expand(root)          self.Expand(root)
109            # select the selected layer
110            selected_layer = self.mainwindow.current_layer()
111            if selected_layer is not None:
112                # One would expect that the selected_layer's id is in
113                # layer_to_item at this point as we've just rebuilt that
114                # mapping completely. However, when a new session is loaded
115                # for instance, it can happen that the tree view is updated
116                # before the canvas's selection in which case selected_layer
117                # may be a layer of the old session.
118                item = self.layer_to_item.get(id(selected_layer))
119                if item is not None:
120                    self.SelectItem(item)
121    
122        def add_items(self, parent, items):
123    
124            if items is None: return
125    
126            for item in items:
127                if hasattr(item, "TreeInfo"):
128                    # Supports the TreeInfo protocol
129                    info = item.TreeInfo()
130                    treeitem = self.AppendItem(parent, info[0], -1, -1, None)
131                    self.SetItemImage(treeitem, self.emptyImageIndex)
132                    self.SetPyData(treeitem, item)
133                    self.add_items(treeitem, info[1])
134                    self.Expand(treeitem)
135                    if isinstance(item, Layer):
136                        self.layer_to_item[id(item)] = treeitem
137                elif isinstance(item, StringType) or \
138                     isinstance(item, UnicodeType):
139                    # it's a string
140                    treeitem = self.AppendItem(parent, item, -1, -1, None)
141                    self.SetItemImage(treeitem, self.emptyImageIndex)
142                else:
143                    # assume its a sequence (title, items)
144                    if isinstance(item[1], Color):
145    
146                        treeitem = self.AppendItem(parent, "(%s)" % item[0])
147    
148                        bmp = wxEmptyBitmap(BMP_SIZE, BMP_SIZE)
149                        brush = wxBrush(Color2wxColour(item[1]), wxSOLID)
150                        dc = wxMemoryDC()
151                        dc.SelectObject(bmp)
152                        dc.SetBrush(brush)
153                        dc.Clear()
154                        dc.DrawRoundedRectangle(0, 0,
155                                                bmp.GetWidth(), bmp.GetHeight(),
156                                                4)
157                        dc.SelectObject(wxNullBitmap)
158    
159                        i = self.image_list.Add(bmp)
160                        self.SetItemImage(treeitem, i)
161                    else:
162                        treeitem = self.AppendItem(parent, item[0], -1, -1, None)
163                        self.SetItemImage(treeitem, self.emptyImageIndex)
164                        self.add_items(treeitem, item[1])
165                    self.Expand(treeitem)
166    
167      def session_changed(self, *args):      def session_changed(self, *args):
168          for channel in (MAPS_CHANGED,          new_session = self.app.session
169                          MAP_PROJECTION_CHANGED,          # if the session has changed subscribe/unsubscribe
170                          LAYERS_CHANGED,          if self.session is not new_session:
171                          LAYER_LEGEND_CHANGED,              if self.session is not None:
172                          LAYER_VISIBILITY_CHANGED):                  self.session.Unsubscribe(CHANGED, self.update_tree)
173              self.app.session.Subscribe(channel, self.update_tree)              if new_session is not None:
174                    new_session.Subscribe(CHANGED, self.update_tree)
175                self.session = new_session
176          self.update_tree()          self.update_tree()
177    
178      def normalize_selection(self):      def normalize_selection(self):
# Line 124  class SessionTreeCtrl(wxTreeCtrl): Line 183  class SessionTreeCtrl(wxTreeCtrl):
183              if isinstance(object, Layer) or isinstance(object, Map):              if isinstance(object, Layer) or isinstance(object, Map):
184                  break                  break
185              item = self.GetItemParent(item)              item = self.GetItemParent(item)
186            else:
187                # No layer or map was found in the chain of parents, so
188                # there's nothing we can do.
189                return
190    
191          self.changing_selection = 1          self.changing_selection = 1
192          try:          try:
# Line 146  class SessionTreeCtrl(wxTreeCtrl): Line 209  class SessionTreeCtrl(wxTreeCtrl):
209              return              return
210          self.normalize_selection()          self.normalize_selection()
211          # SelectedLayer returns None if no layer is selected. Since          # SelectedLayer returns None if no layer is selected. Since
212          # passing None to interactor.SelectLayer deselects the layer we          # passing None to SelectLayer deselects the layer we can simply
213          # can simply pass the result of SelectedLayer on in all cases          # pass the result of SelectedLayer on in all cases
214          self.app.interactor.SelectLayer(self.SelectedLayer())          self.mainwindow.SelectLayer(self.SelectedLayer())
215    
216      def layer_selected(self, layer):      def layer_selected(self, layer):
217          item = self.layer_to_item.get(id(layer))          item = self.layer_to_item.get(id(layer))
# Line 161  class SessionTreeView(NonModalDialog): Line 224  class SessionTreeView(NonModalDialog):
224      """Non modal dialog showing the session as a tree"""      """Non modal dialog showing the session as a tree"""
225    
226      def __init__(self, parent, app, name):      def __init__(self, parent, app, name):
227          NonModalDialog.__init__(self, parent, app.interactor, name, "Session")          NonModalDialog.__init__(self, parent, name, _("Session"))
228          self.tree = SessionTreeCtrl(self, -1, app)          self.tree = SessionTreeCtrl(self, -1, parent, 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
234            # itself is destroyed we could use that to unsubscribe instead
235            # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
236            # all)
237            self.tree.unsubscribe_all()
238    
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