/[thuban]/trunk/thuban/Thuban/UI/projlist.py
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revision 1850 by bh, Tue Oct 21 14:13:41 2003 UTC revision 2878 by dpinte, Tue Jun 2 11:06:15 2009 UTC
# Line 11  __version__ = "$Revision$" Line 11  __version__ = "$Revision$"
11  # $Source$  # $Source$
12  # $Id$  # $Id$
13    
14  from wxPython.wx import *  import wx
15    
16  from Thuban import _  from Thuban import _
17    
# Line 24  from Thuban.Model.messages import PROJEC Line 24  from Thuban.Model.messages import PROJEC
24  PROJ_SELECTION_CHANGED = "PROJ_SELECTION_CHANGED"  PROJ_SELECTION_CHANGED = "PROJ_SELECTION_CHANGED"
25    
26    
27  class ProjectionList(wxListCtrl, Publisher):  class ProjectionList(wx.ListCtrl, Publisher):
28    
29      """A ListCtrl that shows a list of projections      """A ListCtrl that shows a list of projections
30    
31      The list control is effectively a view on two ProjFile instances and      The list control is effectively a view on several ProjFile instances
32      a specific 'original' projection (e.g. the projection of the current      and a specific 'original' projection (e.g. the projection of the
33      map). The list control subscribes to the change messages of the      current map). The list control subscribes to the change messages of
34      ProjFile instances to update the list whenever they change.      the ProjFile instances to update the list whenever they change.
35    
36      When the selection changes the instance sends a      When the selection changes the instance sends a
37      PROJ_SELECTION_CHANGED message.      PROJ_SELECTION_CHANGED message.
38      """      """
39    
40      def __init__(self, parent, system_projs, user_projs, orig_proj, ID = -1):      def __init__(self, parent, proj_files, orig_proj, ID = -1):
41          """Initialize the ProjectionList          """Initialize the ProjectionList
42    
43          Parameters:          Parameters:
44    
45          parent -- The parent widget          parent -- The parent widget
46          system_projs, user_projs -- the system and user ProjFiles          proj_files -- a sequence of ProjFile objects
47          orig_proj -- The projection originally selected in the map/layer          orig_proj -- The projection originally selected in the map/layer
48          """          """
49          wxListCtrl.__init__(self, parent, ID, style=wxLC_REPORT|wxLC_VIRTUAL)          wx.ListCtrl.__init__(self, parent, ID, style=wx.LC_REPORT|wx.LC_VIRTUAL)
50    
51          self.InsertColumn(0, _("Available Projections"))          self.InsertColumn(0, _("Available Projections"))
52          self.system_projs = system_projs          self.proj_files = proj_files
53          self.user_projs = user_projs          self._subscribe_proj_files()
54          self.orig_proj = orig_proj          self.orig_proj = orig_proj
55          self.projections = []          self.projections = []
56          self.proj_map = {}          self.proj_map = {}
57          self.needs_update = False          self.needs_update = False
58          self.update_projections()          self.update_projections()
59          EVT_SIZE(self, self.OnSize)          self.Bind(wx.EVT_SIZE, self.OnSize)
60          EVT_LEFT_UP(self, self.mouse_left_up)          self.Bind(wx.EVT_LEFT_UP, self.mouse_left_up)
61          EVT_LIST_ITEM_SELECTED(self, self.GetId(), self.item_selected)          self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.item_selected, id=self.GetId())
62          EVT_LIST_ITEM_DESELECTED(self, self.GetId(), self.item_deselected)          self.Bind(wx.EVT_LIST_ITEM_DESELECTED, self.item_deselected, id=self.GetId())
63          EVT_IDLE(self, self.OnIdle)          self.Bind(wx.EVT_IDLE, self.OnIdle)
64          for pf in (self.system_projs, self.user_projs):  
65        def __del__(self):
66            Publisher.__del__(self)
67    
68        def _subscribe_proj_files(self):
69            """Subscribe to the messages of self.proj_files"""
70            for pf in self.proj_files:
71              pf.Subscribe(PROJECTION_ADDED, self.pf_projection_added)              pf.Subscribe(PROJECTION_ADDED, self.pf_projection_added)
72              pf.Subscribe(PROJECTION_REMOVED, self.pf_projection_removed)              pf.Subscribe(PROJECTION_REMOVED, self.pf_projection_removed)
73              pf.Subscribe(PROJECTION_REPLACED, self.pf_projection_replaced)              pf.Subscribe(PROJECTION_REPLACED, self.pf_projection_replaced)
74    
75      def __del__(self):      def _unsubscribe_proj_files(self):
76          wxListCtrl.__del__()          """Unsubscribe from the messages subscribed to in _subscribe_proj_files
77          Publisher.__del__()          """
78            for pf in self.proj_files:
79                pf.Unsubscribe(PROJECTION_ADDED, self.pf_projection_added)
80                pf.Unsubscribe(PROJECTION_REMOVED, self.pf_projection_removed)
81                pf.Unsubscribe(PROJECTION_REPLACED, self.pf_projection_replaced)
82    
83      def Destroy(self):      def Destroy(self):
84          wxListCtrl.Destroy()          self._unsubscribe_proj_files()
85          Publisher.Destroy()          # Call wxListCtrl's method last because afterwards self is not
86            # an instance of ProjectionList anymore as wxPython replaces
87            # self.__class__ with its dead object class
88            Publisher.Destroy(self)
89            wx.ListCtrl.Destroy(self)
90    
91      def update_on_idle(self):      def update_on_idle(self):
92          self.needs_update = True          self.needs_update = True
# Line 95  class ProjectionList(wxListCtrl, Publish Line 109  class ProjectionList(wxListCtrl, Publish
109    
110          # Build the new projection list          # Build the new projection list
111          projections = [(_("<None>"), None, None)]          projections = [(_("<None>"), None, None)]
112          for pf in (self.user_projs, self.system_projs):          for pf in self.proj_files:
113              for p in pf.GetProjections():              for p in pf.GetProjections():
114                  projections.append((p.Label(), p, pf))                  projections.append((p.Label(), p, pf))
115          if self.orig_proj is not None:          if self.orig_proj is not None:
# Line 111  class ProjectionList(wxListCtrl, Publish Line 125  class ProjectionList(wxListCtrl, Publish
125          # selected with indices higher than the new count.          # selected with indices higher than the new count.
126          if len(self.projections) < old_length:          if len(self.projections) < old_length:
127              for i in xrange(len(self.projections), old_length):              for i in xrange(len(self.projections), old_length):
128                  self.SetItemState(i, 0, wxLIST_STATE_SELECTED)                  self.SetItemState(i, 0, wx.LIST_STATE_SELECTED)
129    
130          self.SetItemCount(len(self.projections))          self.SetItemCount(len(self.projections))
131    
# Line 121  class ProjectionList(wxListCtrl, Publish Line 135  class ProjectionList(wxListCtrl, Publish
135          for i in xrange(len(self.projections)):          for i in xrange(len(self.projections)):
136              p = self.projections[i][1]              p = self.projections[i][1]
137              if get(id(p)):              if get(id(p)):
138                  state = wxLIST_STATE_SELECTED                  state = wx.LIST_STATE_SELECTED
139                  count += 1                  count += 1
140              else:              else:
141                  state = 0                  state = 0
142              self.SetItemState(i, state, wxLIST_STATE_SELECTED)              self.SetItemState(i, state, wx.LIST_STATE_SELECTED)
143    
144          # If the selection changed send a PROJ_SELECTION_CHANGED message          # If the selection changed send a PROJ_SELECTION_CHANGED message
145          if count != len(selection):          if count != len(selection):
# Line 158  class ProjectionList(wxListCtrl, Publish Line 172  class ProjectionList(wxListCtrl, Publish
172    
173      def SelectProjection(self, proj):      def SelectProjection(self, proj):
174          """Select the projection and deselect all others."""          """Select the projection and deselect all others."""
175            # Set both the wxLIST_STATE_SELECTED and wxLIST_STATE_FOCUSED
176            # flags on the newly selected item. If only
177            # wxLIST_STATE_SELECTED is set, some other item is focused and
178            # the first time the focus is moved with the keyboard the
179            # selection moves in unexpected ways.
180            state = wx.LIST_STATE_SELECTED|wx.LIST_STATE_FOCUSED
181          for i in range(len(self.projections)):          for i in range(len(self.projections)):
182              p = self.projections[i][1]              p = self.projections[i][1]
183              self.SetItemState(i, p is proj and wxLIST_STATE_SELECTED or 0,              self.SetItemState(i, p is proj and state or 0, state)
                               wxLIST_STATE_SELECTED)  
184    
185      def ClearSelection(self):      def ClearSelection(self):
186          """Deselect all projections."""          """Deselect all projections."""
187          for i in range(len(self.projections)):          for i in range(len(self.projections)):
188              self.SetItemState(i, 0, wxLIST_STATE_SELECTED)              self.SetItemState(i, 0, wx.LIST_STATE_SELECTED)
189    
190        def SetProjFiles(self, proj_files):
191            """Set the projfile objects whose projections are shown in the list"""
192            self._unsubscribe_proj_files()
193            self.proj_files = proj_files
194            self._subscribe_proj_files()
195            self.update_projections()
196    
197      def OnGetItemText(self, item, col):      def OnGetItemText(self, item, col):
198          """Callback for the virtual ListCtrl mode"""          """Callback for the virtual ListCtrl mode"""
# Line 190  class ProjectionList(wxListCtrl, Publish Line 216  class ProjectionList(wxListCtrl, Publish
216          """          """
217          return [self.projections[i][1:]          return [self.projections[i][1:]
218                      for i in range(len(self.projections))                      for i in range(len(self.projections))
219                          if self.GetItemState(i, wxLIST_STATE_SELECTED)]                          if self.GetItemState(i, wx.LIST_STATE_SELECTED)]
220    
221      def _issue_proj_selection_changed(self):      def _issue_proj_selection_changed(self):
222          """Internal: Issue a PROJ_SELECTION_CHANGED message"""          """Internal: Issue a PROJ_SELECTION_CHANGED message"""
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