Thuban/UI/controls.py

# Copyright (c) 2001, 2002 by Intevation GmbH
# Authors:
# Bernhard Herzog <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.


"""Common Thuban specific control widgets"""

__version__ = "$Revision$"

from wxPython.wx import wxListCtrl, wxLC_REPORT, wxLIST_AUTOSIZE_USEHEADER, \
     EVT_LIST_ITEM_SELECTED, true, false
from wxPython.grid import wxPyGridTableBase, wxGrid, wxGRID_VALUE_STRING, \
     wxGridTableMessage, wxGRIDTABLE_NOTIFY_ROWS_APPENDED, \
     wxGRIDTABLE_NOTIFY_ROWS_DELETED, wxGRIDTABLE_REQUEST_VIEW_GET_VALUES

from Thuban import _

# FIXME: the wx_value_type_map should be moved from tableview to a
# separate module
from tableview import wx_value_type_map


class RecordListCtrl(wxListCtrl):

    """List Control showing a single record from a thuban table"""

    def __init__(self, parent, id):
        wxListCtrl.__init__(self, parent, id, style = wxLC_REPORT)

        self.InsertColumn(0, _("Field"))
        self.SetColumnWidth(0, 200)
        self.InsertColumn(1, _("Value"))
        self.SetColumnWidth(1, 100)

        # vaues maps row numbers to the corresponding python values
        self.values = {}

    def fill_list(self, table, shape):
        """Fill self with the contents shape's record from table"""
        self.DeleteAllItems()
        values = {}

        if shape is not None:
            num_cols = table.field_count()

            names = []
            for i in range(num_cols):
                type, name, length, decc = table.field_info(i)
                names.append(name)
            record = table.read_record(shape)

            for i in range(len(names)):
                name = names[i]
                value = record[name]
                self.InsertStringItem(i, name)
                self.SetStringItem(i, 1, str(value))
                values[i] = value

        self.values = values

class SelectableRecordListCtrl(RecordListCtrl):

    def __init__(self, parent, id):
        RecordListCtrl.__init__(self, parent, id)

        # selected is the index of the selected record or -1 if none is
        # selected
        self.selected = -1
        EVT_LIST_ITEM_SELECTED(self, self.GetId(), self.OnItemSelected)

    def OnItemSelected(self, event):
        """Event handler. Update the selected instvar"""
        self.selected = event.m_itemIndex

    def GetValue(self):
        """Return the currently selected value. None if no value is selected"""
        if self.selected >= 0:
            return self.values[self.selected]
        else:
            return None


class RecordTable(wxPyGridTableBase):

    """Wrapper that makes a Thuban table record look like a table for a
       wxGrid
    """

    def __init__(self, table = None, record = None):
        wxPyGridTableBase.__init__(self)
        self.num_cols = 1
        self.num_rows = 0
        self.table = None
        self.record_index = record
        self.record = None
        self.SetTable(table, record)

    def SetTable(self, table, record_index):
        old_num_rows = self.num_rows
        if record_index is not None:
            self.table = table
            self.record_index = record_index
            self.record = table.read_record(record_index)

            # we have one row for each field in the table
            self.num_rows = table.field_count()

            # extract the field types and names of the row we're showing.
            self.rows = []
            for i in range(self.num_rows):
                type, name, len, decc = table.field_info(i)
                self.rows.append((name, wx_value_type_map[type], len, decc))
            self.notify_get_values()
        else:
            # make the grid empty
            self.num_rows = 0
            self.rows = []

        # notify the views if the number of rows has changed
        if self.num_rows > old_num_rows:
            self.notify_append_rows(self.num_rows - old_num_rows)
        elif self.num_rows < old_num_rows:
            self.notify_delete_rows(0, old_num_rows - self.num_rows)

    def notify_append_rows(self, num):
        """Tell the view that num rows were appended"""
        self.send_view_message(wxGRIDTABLE_NOTIFY_ROWS_APPENDED, num)

    def notify_delete_rows(self, start, num):
        """Tell the view that num rows were deleted starting at start"""
        self.send_view_message(wxGRIDTABLE_NOTIFY_ROWS_DELETED, start, num)

    def notify_get_values(self):
        """Tell the view that the grid's values have to be updated"""
        self.send_view_message(wxGRIDTABLE_REQUEST_VIEW_GET_VALUES)

    def send_view_message(self, msgid, *args):
        """Send the message msgid to the view with arguments args"""
        view = self.GetView()
        if view:
            #print "send_view_message", msgid, args
            msg = apply(wxGridTableMessage, (self, msgid) + args)
            view.ProcessTableMessage(msg)

    #
    # required methods for the wxPyGridTableBase interface
    #

    def GetNumberRows(self):
        return self.num_rows

    def GetNumberCols(self):
        return self.num_cols

    def IsEmptyCell(self, row, col):
        return row >= self.num_rows or col >= self.num_cols

    # Get/Set values in the table.  The Python version of these
    # methods can handle any data-type, (as long as the Editor and
    # Renderer understands the type too,) not just strings as in the
    # C++ version.
    def GetValue(self, row, col):
        if row < self.num_rows:
            return self.record[self.rows[row][0]]
        return ""

    def SetValue(self, row, col, value):
        if row < self.num_rows:
            name = self.rows[row][0]
            self.record[name] = value
            self.table.write_record(self.record_index, {name: value})

    #
    # Some optional methods
    #

    # Called when the grid needs to display labels
    def GetColLabelValue(self, col):
        return _("Value")

    def GetRowLabelValue(self, row):
        if row < self.num_rows:
            return self.rows[row][0]
        return ""

    # Called to determine the kind of editor/renderer to use by
    # default, doesn't necessarily have to be the same type used
    # nativly by the editor/renderer if they know how to convert.
    def GetTypeName(self, row, col):
        # for some reason row and col may be negative sometimes, but
        # it's probably a wx bug (filed as #593189 on sourceforge)
        if 0 <= row < self.num_rows:
            return self.rows[row][1]
        return wxGRID_VALUE_STRING

    # Called to determine how the data can be fetched and stored by the
    # editor and renderer.  This allows you to enforce some type-safety
    # in the grid.
    def CanGetValueAs(self, row, col, typeName):
        # perhaps we should allow conversion int->double?
        return self.GetTypeName(row, col) == typeName

    def CanSetValueAs(self, row, col, typeName):
        return self.CanGetValueAs(row, col, typeName)


class RecordGridCtrl(wxGrid):

    """Grid view for a RecordTable"""

    def __init__(self, parent, table = None, record = None):
        wxGrid.__init__(self, parent, -1)

        self.table = RecordTable(table, record)

        # The second parameter means that the grid is to take ownership
        # of the table and will destroy it when done. Otherwise you
        # would need to keep a reference to it and call it's Destroy
        # method later.
        self.SetTable(self.table, true)

        #self.SetMargins(0,0)
        self.AutoSizeColumn(0, true)

        #self.SetSelectionMode(wxGrid.wxGridSelectRows)

        #EVT_GRID_RANGE_SELECT(self, self.OnRangeSelect)
        #EVT_GRID_SELECT_CELL(self, self.OnSelectCell)

    def SetTableRecord(self, table, record):
        self.table.SetTable(table, record)
1	bh	79	# Copyright (c) 2001, 2002 by Intevation GmbH
2	bh	50	# Authors:
3			# Bernhard Herzog <[email protected]>
4			#
5			# This program is free software under the GPL (>=v2)
6			# Read the file COPYING coming with Thuban for details.
7
8
9			"""Common Thuban specific control widgets"""
10
11			__version__ = "$Revision$"
12
13			from wxPython.wx import wxListCtrl, wxLC_REPORT, wxLIST_AUTOSIZE_USEHEADER, \
14	bh	79	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	bh	50
19	jan	374	from Thuban import _
20
21	bh	79	# 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	bh	50
25	bh	79
26
27	bh	50	class RecordListCtrl(wxListCtrl):
28
29			"""List Control showing a single record from a thuban table"""
30
31			def __init__(self, parent, id):
32			wxListCtrl.__init__(self, parent, id, style = wxLC_REPORT)
33
34	jan	374	self.InsertColumn(0, _("Field"))
35	frank	420	self.SetColumnWidth(0, 200)
36	jan	374	self.InsertColumn(1, _("Value"))
37	frank	420	self.SetColumnWidth(1, 100)
38	bh	50
39			# vaues maps row numbers to the corresponding python values
40			self.values = {}
41
42			def fill_list(self, table, shape):
43			"""Fill self with the contents shape's record from table"""
44			self.DeleteAllItems()
45			values = {}
46
47			if shape is not None:
48			num_cols = table.field_count()
49
50			names = []
51			for i in range(num_cols):
52			type, name, length, decc = table.field_info(i)
53			names.append(name)
54			record = table.read_record(shape)
55
56			for i in range(len(names)):
57			name = names[i]
58			value = record[name]
59			self.InsertStringItem(i, name)
60			self.SetStringItem(i, 1, str(value))
61			values[i] = value
62
63			self.values = values
64
65			class SelectableRecordListCtrl(RecordListCtrl):
66
67			def __init__(self, parent, id):
68			RecordListCtrl.__init__(self, parent, id)
69
70			# selected is the index of the selected record or -1 if none is
71			# selected
72			self.selected = -1
73			EVT_LIST_ITEM_SELECTED(self, self.GetId(), self.OnItemSelected)
74
75			def OnItemSelected(self, event):
76			"""Event handler. Update the selected instvar"""
77			self.selected = event.m_itemIndex
78
79			def GetValue(self):
80			"""Return the currently selected value. None if no value is selected"""
81			if self.selected >= 0:
82			return self.values[self.selected]
83			else:
84			return None
85	bh	79
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	bh	274	self.record[name] = value
175			self.table.write_record(self.record_index, {name: value})
176	bh	79
177			#
178			# Some optional methods
179			#
180
181			# Called when the grid needs to display labels
182			def GetColLabelValue(self, col):
183	jan	374	return _("Value")
184	bh	79
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	bh	255	# 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	bh	79	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	bh	255
212	bh	79	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	bh	255
232	bh	79	#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)
Name	Value
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svn:keywords	Author Date Id Revision