/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/UI/controls.py
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revision 50 by bh, Mon Sep 10 16:04:21 2001 UTC revision 374 by jan, Mon Jan 27 14:20:02 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001 by Intevation GmbH  # Copyright (c) 2001, 2002 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  #  #
# Line 11  Line 11 
11  __version__ = "$Revision$"  __version__ = "$Revision$"
12    
13  from wxPython.wx import wxListCtrl, wxLC_REPORT, wxLIST_AUTOSIZE_USEHEADER, \  from wxPython.wx import wxListCtrl, wxLC_REPORT, wxLIST_AUTOSIZE_USEHEADER, \
14       EVT_LIST_ITEM_SELECTED       EVT_LIST_ITEM_SELECTED, true, false
15    from wxPython.grid import wxPyGridTableBase, wxGrid, wxGRID_VALUE_STRING, \
16         wxGridTableMessage, wxGRIDTABLE_NOTIFY_ROWS_APPENDED, \
17         wxGRIDTABLE_NOTIFY_ROWS_DELETED, wxGRIDTABLE_REQUEST_VIEW_GET_VALUES
18    
19    from Thuban import _
20    
21    # FIXME: the wx_value_type_map should be moved from tableview to a
22    # separate module
23    from tableview import wx_value_type_map
24    
25    
26    
27  class RecordListCtrl(wxListCtrl):  class RecordListCtrl(wxListCtrl):
# Line 21  class RecordListCtrl(wxListCtrl): Line 31  class RecordListCtrl(wxListCtrl):
31      def __init__(self, parent, id):      def __init__(self, parent, id):
32          wxListCtrl.__init__(self, parent, id, style = wxLC_REPORT)          wxListCtrl.__init__(self, parent, id, style = wxLC_REPORT)
33    
34          self.InsertColumn(0, "Field")          self.InsertColumn(0, _("Field"))
35          self.SetColumnWidth(0, wxLIST_AUTOSIZE_USEHEADER)          self.SetColumnWidth(0, wxLIST_AUTOSIZE_USEHEADER)
36          self.InsertColumn(1, "Value")          self.InsertColumn(1, _("Value"))
37          self.SetColumnWidth(1, wxLIST_AUTOSIZE_USEHEADER)          self.SetColumnWidth(1, wxLIST_AUTOSIZE_USEHEADER)
38    
39          # vaues maps row numbers to the corresponding python values          # vaues maps row numbers to the corresponding python values
# Line 72  class SelectableRecordListCtrl(RecordLis Line 82  class SelectableRecordListCtrl(RecordLis
82              return self.values[self.selected]              return self.values[self.selected]
83          else:          else:
84              return None              return None
85    
86    
87    class RecordTable(wxPyGridTableBase):
88    
89        """Wrapper that makes a Thuban table record look like a table for a
90           wxGrid
91        """
92    
93        def __init__(self, table = None, record = None):
94            wxPyGridTableBase.__init__(self)
95            self.num_cols = 1
96            self.num_rows = 0
97            self.table = None
98            self.record_index = record
99            self.record = None
100            self.SetTable(table, record)
101    
102        def SetTable(self, table, record_index):
103            old_num_rows = self.num_rows
104            if record_index is not None:
105                self.table = table
106                self.record_index = record_index
107                self.record = table.read_record(record_index)
108    
109                # we have one row for each field in the table
110                self.num_rows = table.field_count()
111    
112                # extract the field types and names of the row we're showing.
113                self.rows = []
114                for i in range(self.num_rows):
115                    type, name, len, decc = table.field_info(i)
116                    self.rows.append((name, wx_value_type_map[type], len, decc))
117                self.notify_get_values()
118            else:
119                # make the grid empty
120                self.num_rows = 0
121                self.rows = []
122    
123            # notify the views if the number of rows has changed
124            if self.num_rows > old_num_rows:
125                self.notify_append_rows(self.num_rows - old_num_rows)
126            elif self.num_rows < old_num_rows:
127                self.notify_delete_rows(0, old_num_rows - self.num_rows)
128    
129        def notify_append_rows(self, num):
130            """Tell the view that num rows were appended"""
131            self.send_view_message(wxGRIDTABLE_NOTIFY_ROWS_APPENDED, num)
132    
133        def notify_delete_rows(self, start, num):
134            """Tell the view that num rows were deleted starting at start"""
135            self.send_view_message(wxGRIDTABLE_NOTIFY_ROWS_DELETED, start, num)
136    
137        def notify_get_values(self):
138            """Tell the view that the grid's values have to be updated"""
139            self.send_view_message(wxGRIDTABLE_REQUEST_VIEW_GET_VALUES)
140    
141        def send_view_message(self, msgid, *args):
142            """Send the message msgid to the view with arguments args"""
143            view = self.GetView()
144            if view:
145                #print "send_view_message", msgid, args
146                msg = apply(wxGridTableMessage, (self, msgid) + args)
147                view.ProcessTableMessage(msg)
148    
149        #
150        # required methods for the wxPyGridTableBase interface
151        #
152    
153        def GetNumberRows(self):
154            return self.num_rows
155    
156        def GetNumberCols(self):
157            return self.num_cols
158    
159        def IsEmptyCell(self, row, col):
160            return row >= self.num_rows or col >= self.num_cols
161    
162        # Get/Set values in the table.  The Python version of these
163        # methods can handle any data-type, (as long as the Editor and
164        # Renderer understands the type too,) not just strings as in the
165        # C++ version.
166        def GetValue(self, row, col):
167            if row < self.num_rows:
168                return self.record[self.rows[row][0]]
169            return ""
170    
171        def SetValue(self, row, col, value):
172            if row < self.num_rows:
173                name = self.rows[row][0]
174                self.record[name] = value
175                self.table.write_record(self.record_index, {name: value})
176    
177        #
178        # Some optional methods
179        #
180    
181        # Called when the grid needs to display labels
182        def GetColLabelValue(self, col):
183            return _("Value")
184    
185        def GetRowLabelValue(self, row):
186            if row < self.num_rows:
187                return self.rows[row][0]
188            return ""
189    
190        # Called to determine the kind of editor/renderer to use by
191        # default, doesn't necessarily have to be the same type used
192        # nativly by the editor/renderer if they know how to convert.
193        def GetTypeName(self, row, col):
194            # for some reason row and col may be negative sometimes, but
195            # it's probably a wx bug (filed as #593189 on sourceforge)
196            if 0 <= row < self.num_rows:
197                return self.rows[row][1]
198            return wxGRID_VALUE_STRING
199    
200        # Called to determine how the data can be fetched and stored by the
201        # editor and renderer.  This allows you to enforce some type-safety
202        # in the grid.
203        def CanGetValueAs(self, row, col, typeName):
204            # perhaps we should allow conversion int->double?
205            return self.GetTypeName(row, col) == typeName
206    
207        def CanSetValueAs(self, row, col, typeName):
208            return self.CanGetValueAs(row, col, typeName)
209    
210    
211    
212    class RecordGridCtrl(wxGrid):
213    
214        """Grid view for a RecordTable"""
215    
216        def __init__(self, parent, table = None, record = None):
217            wxGrid.__init__(self, parent, -1)
218    
219            self.table = RecordTable(table, record)
220    
221            # The second parameter means that the grid is to take ownership
222            # of the table and will destroy it when done. Otherwise you
223            # would need to keep a reference to it and call it's Destroy
224            # method later.
225            self.SetTable(self.table, true)
226    
227            #self.SetMargins(0,0)
228            self.AutoSizeColumn(0, true)
229    
230            #self.SetSelectionMode(wxGrid.wxGridSelectRows)
231    
232            #EVT_GRID_RANGE_SELECT(self, self.OnRangeSelect)
233            #EVT_GRID_SELECT_CELL(self, self.OnSelectCell)
234    
235        def SetTableRecord(self, table, record):
236            self.table.SetTable(table, record)
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