/[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 2700 by dpinte, Mon Sep 18 14:27:02 2006 UTC
# Line 1  Line 1 
1  #! /usr/bin/python  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
 # Copyright (c) 2001 by Intevation GmbH  
2  # Authors:  # Authors:
3  # Jan-Oliver Wagner <[email protected]>  # Jan-Oliver Wagner <[email protected]>
4  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
# Line 9  Line 8 
8    
9  __version__ = "$Revision$"  __version__ = "$Revision$"
10    
11  from wxPython.wx import *  from types import StringType, UnicodeType
12    
13  from Thuban.Model.messages import MAPS_CHANGED, MAP_PROJECTION_CHANGED, \  import wx
14       LAYERS_CHANGED, LAYER_LEGEND_CHANGED, LAYER_VISIBILITY_CHANGED  
15  from Thuban.Model.layer import Layer, shapetype_names  from Thuban import _
16    from Thuban.UI.common import Color2wxColour
17    
18    from Thuban.Model.color import Color
19    
20    from Thuban.Model.messages import CHANGED
21    from Thuban.Model.layer import Layer
22  from Thuban.Model.map import Map  from Thuban.Model.map import Map
23    
24  from dialogs import NonModalDialog  from dialogs import NonModalNonParentDialog
25  from messages import SESSION_CHANGED, SELECTED_LAYER  from messages import SESSION_REPLACED, LAYER_SELECTED
26    
27    BMP_SIZE = 15
28    
29    class SessionTreeCtrl(wx.TreeCtrl):
30    
31        """Widget to display a tree view of the session.
32    
33  def color_string(color):      The tree view is created recursively from the session object. The
34      if color is None:      tree view calls the session's TreeInfo method which should return a
35          return "None"      pair (<title>, <item>) where <title> ist the title of the session
36      return "(%.3f, %.3f, %.3f)" % (color.red, color.green, color.blue)      item in the tree view and <items> is a list of objects to use as the
37        children of the session in the tree view.
38    
39        The items list can contain three types of items:
40    
41  class SessionTreeCtrl(wxTreeCtrl):         1. a string. The string is used as the title for a leaf item in
42              the tree view.
43    
44           2. an object with a TreeInfo method. This method is called and
45              should return a pair just like the session's TreeInfo method.
46    
47           3. a pair (<title>, <item>) which is treated like the return
48              value of TreeInfo.
49        """
50    
51        def __init__(self, parent, ID, mainwindow, app):
52    
     def __init__(self, parent, ID, app):  
53          # 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.
54          wxTreeCtrl.__init__(self, parent, ID)          wx.TreeCtrl.__init__(self, parent, ID)
55    
56            self.mainwindow = mainwindow
57          self.app = app          self.app = app
58          # boolean to indicate that we manipulate the selection ourselves          # boolean to indicate that we manipulate the selection ourselves
59          # so that we can ignore the selection events generated          # so that we can ignore the selection events generated
# Line 39  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.mainwindow.Subscribe(LAYER_SELECTED, 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)          self.Bind(wx.EVT_TREE_SEL_CHANGED, self.OnSelChanged, id=self.GetId())
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.mainwindow.Unsubscribe(LAYER_SELECTED, 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 = wx.ImageList(BMP_SIZE, BMP_SIZE, False, 0)
89              self.AppendItem(root, "Filename:")  
90          else:          bmp = wx.EmptyBitmap(BMP_SIZE, BMP_SIZE)
91              self.AppendItem(root, "Filename: %s" % session.filename)          dc = wx.MemoryDC()
92          if session.WasModified():          dc.SelectObject(bmp)
93              self.AppendItem(root, "Modified: yes")          dc.SetBrush(wx.BLACK_BRUSH)
94          else:          dc.Clear()
95              self.AppendItem(root, "Modified: no")          dc.SelectObject(wx.NullBitmap)
96    
97            self.emptyImageIndex = \
98                self.image_list.AddWithColourMask(bmp, wx.Colour(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              self.AppendItem(mapitem, ("Extent (lat-lon): (%g, %g, %g, %g)"          info = session.TreeInfo()
104                                        % map.BoundingBox()))          root = self.AddRoot(info[0], -1, -1, None)
105              if map.projection and len(map.projection.params) > 0:          self.SetItemImage(root, self.emptyImageIndex)
106                  self.AppendItem(mapitem,          self.add_items(root, info[1])
                                 ("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())  
                     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)  
107          self.Expand(root)          self.Expand(root)
108            # select the selected layer
109            selected_layer = self.mainwindow.current_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 canvas's selection in which case selected_layer
116                # may be 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 = wx.EmptyBitmap(BMP_SIZE, BMP_SIZE)
148                        brush = wx.Brush(Color2wxColour(item[1]), wx.SOLID)
149                        dc = wx.MemoryDC()
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(wx.NullBitmap)
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          for channel in (MAPS_CHANGED,          new_session = self.app.session
168                          MAP_PROJECTION_CHANGED,          # if the session has changed subscribe/unsubscribe
169                          LAYERS_CHANGED,          if self.session is not new_session:
170                          LAYER_LEGEND_CHANGED,              if self.session is not None:
171                          LAYER_VISIBILITY_CHANGED):                  self.session.Unsubscribe(CHANGED, self.update_tree)
172              self.app.session.Subscribe(channel, self.update_tree)              if new_session is not None:
173                    new_session.Subscribe(CHANGED, self.update_tree)
174                self.session = new_session
175          self.update_tree()          self.update_tree()
176    
177      def normalize_selection(self):      def normalize_selection(self):
# Line 124  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 146  class SessionTreeCtrl(wxTreeCtrl): Line 208  class SessionTreeCtrl(wxTreeCtrl):
208              return              return
209          self.normalize_selection()          self.normalize_selection()
210          # SelectedLayer returns None if no layer is selected. Since          # SelectedLayer returns None if no layer is selected. Since
211          # passing None to interactor.SelectLayer deselects the layer we          # passing None to SelectLayer deselects the layer we can simply
212          # can simply pass the result of SelectedLayer on in all cases          # pass the result of SelectedLayer on in all cases
213          self.app.interactor.SelectLayer(self.SelectedLayer())          self.mainwindow.SelectLayer(self.SelectedLayer())
214    
215      def layer_selected(self, layer):      def layer_selected(self, layer):
216          item = self.layer_to_item.get(id(layer))          item = self.layer_to_item.get(id(layer))
# Line 156  class SessionTreeCtrl(wxTreeCtrl): Line 218  class SessionTreeCtrl(wxTreeCtrl):
218              self.SelectItem(item)              self.SelectItem(item)
219    
220    
221  class SessionTreeView(NonModalDialog):  class SessionTreeView(NonModalNonParentDialog):
222    
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")          NonModalNonParentDialog.__init__(self, parent, name, _("Session"))
227          self.tree = SessionTreeCtrl(self, -1, app)          self.tree = SessionTreeCtrl(self, -1, parent, app)
228    
229      def OnClose(self, event):      def OnClose(self, event):
230          #self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)          NonModalNonParentDialog.OnClose(self, event)
231          NonModalDialog.OnClose(self, event)  
232            # if there were a way to get notified when the tree control
233            # itself is destroyed we could use that to unsubscribe instead
234            # of doing it here. (EVT_WINDOW_DESTROY doesn't seem to sent at
235            # all)
236            self.tree.unsubscribe_all()
237    
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