/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/tableview.py
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revision 279 by bh, Mon Aug 26 15:06:01 2002 UTC revision 808 by bh, Mon May 5 10:33:47 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001, 2002 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 15  from Thuban.Model.table import FIELDTYPE Line 15  from Thuban.Model.table import FIELDTYPE
15       FIELDTYPE_STRING       FIELDTYPE_STRING
16  import view  import view
17  from dialogs import NonModalDialog  from dialogs import NonModalDialog
18  from messages import SELECTED_SHAPE  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,
# Line 97  class DataTable(wxPyGridTableBase): Line 97  class DataTable(wxPyGridTableBase):
97    
98  class TableGrid(wxGrid, Publisher):  class TableGrid(wxGrid, Publisher):
99    
100      """A grid view for a Thuban table"""      """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        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
# Line 133  class TableGrid(wxGrid, Publisher): Line 143  class TableGrid(wxGrid, Publisher):
143      def OnSelectCell(self, event):      def OnSelectCell(self, event):
144          self.issue(ROW_SELECTED, event.GetRow())          self.issue(ROW_SELECTED, event.GetRow())
145    
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):  class LayerTableGrid(TableGrid):
174    
# Line 150  class LayerTableGrid(TableGrid): Line 186  class LayerTableGrid(TableGrid):
186          """          """
187          if layer is not None and layer.table is self.table.table \          if layer is not None and layer.table is self.table.table \
188             and shape is not None:             and shape is not None:
189              self.SelectRow(shape)              self.disallow_messages()
190              self.SetGridCursor(shape, 0)              try:
191              self.MakeCellVisible(shape, 0)                  self.SelectRow(shape)
192                    self.SetGridCursor(shape, 0)
193                    self.MakeCellVisible(shape, 0)
194                finally:
195                    self.allow_messages()
196    
197    
198  class TableFrame(NonModalDialog):  class TableFrame(NonModalDialog):
199    
200      """Frame that displays a Thuban table in a grid view"""      """Frame that displays a Thuban table in a grid view"""
201    
202      def __init__(self, parent, interactor, name, title, table):      def __init__(self, parent, name, title, table):
203          NonModalDialog.__init__(self, parent, interactor, name, title)          NonModalDialog.__init__(self, parent, name, title)
204          self.table = table          self.table = table
205          self.grid = self.make_grid(self.table)          self.grid = self.make_grid(self.table)
206    
# Line 181  class LayerTableFrame(TableFrame): Line 221  class LayerTableFrame(TableFrame):
221      selected object in a map.      selected object in a map.
222      """      """
223    
224      def __init__(self, parent, interactor, name, title, layer, table):      def __init__(self, parent, name, title, layer, table):
225          TableFrame.__init__(self, parent, interactor, name, title, table)          TableFrame.__init__(self, parent, name, title, table)
226          self.layer = layer          self.layer = layer
227          self.grid.Subscribe(ROW_SELECTED, self.row_selected)          self.grid.Subscribe(ROW_SELECTED, self.row_selected)
228          self.interactor.Subscribe(SELECTED_SHAPE, self.select_shape)          self.parent.Subscribe(SHAPES_SELECTED, self.select_shape)
229    
230      def make_grid(self, table):      def make_grid(self, table):
231          """Override the derived method to return a LayerTableGrid.          """Override the derived method to return a LayerTableGrid.
# Line 193  class LayerTableFrame(TableFrame): Line 233  class LayerTableFrame(TableFrame):
233          return LayerTableGrid(self, table)          return LayerTableGrid(self, table)
234    
235      def OnClose(self, event):      def OnClose(self, event):
236          self.interactor.Unsubscribe(SELECTED_SHAPE, self.select_shape)          self.parent.Unsubscribe(SHAPES_SELECTED, self.select_shape)
237          TableFrame.OnClose(self, event)          TableFrame.OnClose(self, event)
238    
239      def select_shape(self, layer, shape):      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)          self.grid.select_shape(layer, shape)
250    
251      def row_selected(self, row):      def row_selected(self, row):
252          if self.layer is not None:          if self.layer is not None:
253              self.interactor.SelectLayerAndShape(self.layer, row)              self.parent.SelectShapes(self.layer, [row])
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