/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tableview.py
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revision 6 by bh, Tue Aug 28 15:41:52 2001 UTC revision 808 by bh, Mon May 5 10:33:47 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001 by Intevation GmbH  # Copyright (c) 2001, 2002, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  #  #
# Line 10  __version__ = "$Revision$" Line 10  __version__ = "$Revision$"
10  from wxPython.wx import *  from wxPython.wx import *
11  from wxPython.grid import *  from wxPython.grid import *
12    
13    from Thuban.Lib.connector import Publisher
14  from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \  from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \
15       FIELDTYPE_STRING       FIELDTYPE_STRING
16  import view  import view
17  from messages import SELECTED_SHAPE  from dialogs import NonModalDialog
18    from messages import SHAPES_SELECTED
19    
20  wx_value_type_map = {FIELDTYPE_INT: wxGRID_VALUE_NUMBER,  wx_value_type_map = {FIELDTYPE_INT: wxGRID_VALUE_NUMBER,
21                       FIELDTYPE_DOUBLE: wxGRID_VALUE_FLOAT,                       FIELDTYPE_DOUBLE: wxGRID_VALUE_FLOAT,
22                       FIELDTYPE_STRING: wxGRID_VALUE_STRING}                       FIELDTYPE_STRING: wxGRID_VALUE_STRING}
23    
24    ROW_SELECTED = "ROW_SELECTED"
25    
26    
27  class DataTable(wxPyGridTableBase):  class DataTable(wxPyGridTableBase):
28    
29        """Wrapper around a Thuban table object suitable for a wxGrid"""
30    
31      def __init__(self, table = None):      def __init__(self, table = None):
32          wxPyGridTableBase.__init__(self)          wxPyGridTableBase.__init__(self)
33          self.num_cols = 0          self.num_cols = 0
# Line 88  class DataTable(wxPyGridTableBase): Line 95  class DataTable(wxPyGridTableBase):
95          return self.CanGetValueAs(row, col, typeName)          return self.CanGetValueAs(row, col, typeName)
96    
97    
98      # Thuban stuff  class TableGrid(wxGrid, Publisher):
     def SelectRow(self, row):  
         import main  
         interactor = main.app.interactor  
         return interactor.SelectShape(self.table, row)  
   
99    
100        """A grid view for a Thuban table
101    
102        When rows are selected by the user the table issues ROW_SELECTED
103        messages. wx sends selection events even when the selection is
104  class TableGrid(wxGrid):      manipulated by code (instead of by the user) which usually lead to
105        ROW_SELECTED messages being sent in turn. Therefore sending messages
106        can be switched on and off with the allow_messages and
107        disallow_messages methods.
108        """
109    
110      def __init__(self, parent, table = None):      def __init__(self, parent, table = None):
111          wxGrid.__init__(self, parent, -1)          wxGrid.__init__(self, parent, -1)
112    
113            self.allow_messages_count = 0
114    
115          self.table = DataTable(table)          self.table = DataTable(table)
116    
117          # The second parameter means that the grid is to take ownership          # The second parameter means that the grid is to take ownership
118          # of the table and will destroy it when done. Otherwise you          # of the table and will destroy it when done. Otherwise you
119          # would need to keep a reference to it and call it's Destroy          # would need to keep a reference to it and call its Destroy
120          # method later.          # method later.
121          self.SetTable(self.table, true)          self.SetTable(self.table, true)
122    
123          #self.SetMargins(0,0)          #self.SetMargins(0,0)
124          self.AutoSizeColumns(false)  
125            # AutoSizeColumns would allow us to make the grid have optimal
126            # column widths automatically but it would cause a traversal of
127            # the entire table which for large .dbf files can take a very
128            # long time.
129            #self.AutoSizeColumns(false)
130    
131          self.SetSelectionMode(wxGrid.wxGridSelectRows)          self.SetSelectionMode(wxGrid.wxGridSelectRows)
132            
133          EVT_GRID_RANGE_SELECT(self, self.OnRangeSelect)          EVT_GRID_RANGE_SELECT(self, self.OnRangeSelect)
134          EVT_GRID_SELECT_CELL(self, self.OnSelectCell)          EVT_GRID_SELECT_CELL(self, self.OnSelectCell)
         import main  
         main.app.interactor.Subscribe(SELECTED_SHAPE, self.select_shape)  
135    
136      def SetTableObject(self, table):      def SetTableObject(self, table):
137          self.table.SetTable(table)          self.table.SetTable(table)
138    
139      def OnRangeSelect(self, event):      def OnRangeSelect(self, event):
140          if event.Selecting():          if event.Selecting():
141              if not self.table.SelectRow(event.GetTopLeftCoords().GetRow()):              self.issue(ROW_SELECTED, event.GetTopLeftCoords().GetRow())
                 event.Skip()  
142    
143      def OnSelectCell(self, event):      def OnSelectCell(self, event):
144          if not self.table.SelectRow(event.GetRow()):          self.issue(ROW_SELECTED, event.GetRow())
145              event.Skip()  
146        def disallow_messages(self):
147            """Disallow messages to be send.
148    
149            This method only increases a counter so that calls to
150            disallow_messages and allow_messages can be nested. Only the
151            outermost calls will actually switch message sending on and off.
152            """
153            self.allow_messages_count += 1
154    
155        def allow_messages(self):
156            """Allow messages to be send.
157    
158            This method only decreases a counter so that calls to
159            disallow_messages and allow_messages can be nested. Only the
160            outermost calls will actually switch message sending on and off.
161            """
162            self.allow_messages_count -= 1
163    
164        def issue(self, *args):
165            """Issue a message unless disallowed.
166    
167            See the allow_messages and disallow_messages methods.
168            """
169            if self.allow_messages_count == 0:
170                Publisher.issue(self, *args)
171    
172    
173    class LayerTableGrid(TableGrid):
174    
175        """Table grid for the layer tables.
176    
177        The LayerTableGrid is basically the same as a TableGrid but it's
178        selection is usually coupled to the selected object in the map.
179        """
180    
181      def select_shape(self, layer, shape):      def select_shape(self, layer, shape):
182          if layer is not None and layer.table is self.table.table:          """Select the row corresponding to the specified shape and layer
             self.SelectRow(shape)  
             self.SetGridCursor(shape, 0)  
             self.MakeCellVisible(shape, 0)  
183    
184            If layer is not the layer the table is associated with do
185            nothing. If shape or layer is None also do nothing.
186            """
187            if layer is not None and layer.table is self.table.table \
188               and shape is not None:
189                self.disallow_messages()
190                try:
191                    self.SelectRow(shape)
192                    self.SetGridCursor(shape, 0)
193                    self.MakeCellVisible(shape, 0)
194                finally:
195                    self.allow_messages()
196    
 class TableFrame(wxFrame):  
197    
198      def __init__(self, parent, table = None):  class TableFrame(NonModalDialog):
199          wxFrame.__init__(self, parent, -1, "Thuban Table")  
200          grid = TableGrid(self, table)      """Frame that displays a Thuban table in a grid view"""
201    
202        def __init__(self, parent, name, title, table):
203            NonModalDialog.__init__(self, parent, name, title)
204            self.table = table
205            self.grid = self.make_grid(self.table)
206    
207        def make_grid(self, table):
208            """Return the table grid to use in the frame.
209    
210            The default implementation returns a TableGrid instance.
211            Override in derived classes to use different grid classes.
212            """
213            return TableGrid(self, table)
214    
215    
216    class LayerTableFrame(TableFrame):
217    
218        """Frame that displays a layer table in a grid view
219    
220        A LayerTableFrame is TableFrame whose selection is connected to the
221        selected object in a map.
222        """
223    
224        def __init__(self, parent, name, title, layer, table):
225            TableFrame.__init__(self, parent, name, title, table)
226            self.layer = layer
227            self.grid.Subscribe(ROW_SELECTED, self.row_selected)
228            self.parent.Subscribe(SHAPES_SELECTED, self.select_shape)
229    
230        def make_grid(self, table):
231            """Override the derived method to return a LayerTableGrid.
232            """
233            return LayerTableGrid(self, table)
234    
235        def OnClose(self, event):
236            self.parent.Unsubscribe(SHAPES_SELECTED, self.select_shape)
237            TableFrame.OnClose(self, event)
238    
239        def select_shape(self, layer, shapes):
240            """Subscribed to the SHAPES_SELECTED message.
241    
242            If shapes contains exactly one shape id, select that shape in
243            the grid. Otherwise deselect all.
244            """
245            if len(shapes):
246                shape = shapes[0]
247            else:
248                shape = None
249            self.grid.select_shape(layer, shape)
250    
251        def row_selected(self, row):
252            if self.layer is not None:
253                self.parent.SelectShapes(self.layer, [row])
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