Thuban/UI/join.py

# Copyright (c) 2003 by Intevation GmbH
# Authors:
# Jonathan Coles <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

import sys
from wxPython.wx import *

from Thuban import _

from Thuban.Model.transientdb import TransientJoinedTable
from Thuban.Model.data import DerivedShapeStore
from Thuban.UI.tableview import QueryTableFrame

ID_LEFT_TABLE = 4001
ID_RIGHT_TABLE = 4002

CHOICE_WIDTH = 150

class JoinDialog(wxDialog):

    """Table join dialog.

    Join two tables (left/right) based on the user selected fields.
    Opens a QueryTableFrame and registers the new table with the session.
    """

    def __init__(self, parent, title, session, layer = None):
        wxDialog.__init__(self, parent, -1, title,
                          style = wxDEFAULT_DIALOG_STYLE|wxRESIZE_BORDER)
        self.layer = layer

        if not layer:
            self.choice_left_table = wxChoice(self, ID_LEFT_TABLE)
            width, height = self.choice_left_table.GetSizeTuple()
            self.choice_left_table.SetSize(wxSize(CHOICE_WIDTH, height))
            self.left_table = None
        else:
            self.choice_left_table = None
            self.left_table = layer.ShapeStore().Table()

        self.choice_right_table = wxChoice(self, ID_RIGHT_TABLE)
        width, height = self.choice_right_table.GetSizeTuple()
        self.choice_right_table.SetSize(wxSize(CHOICE_WIDTH, height))

        self.choice_left_field = wxChoice(self, -1)
        width, height = self.choice_left_field.GetSizeTuple()
        self.choice_left_field.SetSize(wxSize(CHOICE_WIDTH, height))
        self.choice_right_field = wxChoice(self, -1)
        width, height = self.choice_right_field.GetSizeTuple()
        self.choice_right_field.SetSize(wxSize(CHOICE_WIDTH, height))

        self.button_join = wxButton(self, wxID_OK, _("Join"))
        self.button_join.SetDefault()
        self.button_close = wxButton(self, wxID_CANCEL, _("Close"))

        EVT_BUTTON(self, wxID_OK, self.OnJoin)

        if self.choice_left_table is not None:
            self.choice_left_table.Append('Select ...', None)
        self.choice_right_table.Append('Select ...', None)

        for t in session.Tables():
            if self.choice_left_table is not None:
                self.choice_left_table.Append(t.Title(), t)

            # If there is no choice_left_table then self.left_table will
            # be the keft table so we can simply leave it out on the
            # right side.
            if t is not self.left_table:
                self.choice_right_table.Append(t.Title(), t)

        if self.choice_left_table is None:
            for col in self.left_table.Columns():
                self.choice_left_field.Append(col.name, col)

        if self.choice_left_table is not None:
            EVT_CHOICE(self, ID_LEFT_TABLE, self.OnLeftTable)
        EVT_CHOICE(self, ID_RIGHT_TABLE, self.OnRightTable)

        if self.choice_left_table is not None:
            self.choice_left_table.SetSelection(0)
        self.choice_right_table.SetSelection(0)
        self.button_join.Enable(False)

        topBox = wxBoxSizer(wxVERTICAL)

        sizer = wxFlexGridSizer(2, 4)
        sizer.Add(wxStaticText(self, -1, _("Table:")), 0, wxALL, 4)
        if self.choice_left_table is not None:
            sizer.Add(self.choice_left_table, 1,
                      wxEXPAND|wxALL|wxALIGN_CENTER_VERTICAL, 4)
        else:
            sizer.Add(wxStaticText(self, -1, self.left_table.Title()), 0,
                      wxALL, 4)

        sizer.Add(wxStaticText(self, -1, _("Table:")), 0, wxALL, 4)
        sizer.Add(self.choice_right_table, 1,
                  wxEXPAND|wxALL|wxALIGN_CENTER_VERTICAL, 4)
        sizer.Add(wxStaticText(self, -1, _("Field:")), 0, wxALL, 4)
        sizer.Add(self.choice_left_field, 1,
                  wxEXPAND|wxALL|wxALIGN_CENTER_VERTICAL, 4)
        sizer.Add(wxStaticText(self, -1, _("Field:")), 0, wxALL, 4)
        sizer.Add(self.choice_right_field, 1,
                  wxEXPAND|wxALL|wxALIGN_CENTER_VERTICAL, 4)

        sizer.AddGrowableCol(1)
        sizer.AddGrowableCol(3)

        topBox.Add(sizer, 0, wxEXPAND|wxALL, 4)

        sizer = wxBoxSizer(wxHORIZONTAL)
        self.check_outer_join = wxCheckBox(self,-1,
                                _("Outer Join (preserves left table records)"))
        sizer.Add(self.check_outer_join, 1, wxALL,4)
        topBox.Add(sizer, 0, wxALIGN_LEFT|wxALIGN_TOP, 4)

        sizer = wxBoxSizer(wxHORIZONTAL)
        sizer.Add(self.button_join, 0, wxALIGN_RIGHT|wxALIGN_BOTTOM|wxRIGHT,
                  10)
        sizer.Add(self.button_close, 0, wxALIGN_RIGHT|wxALIGN_BOTTOM|wxRIGHT,
                  10)

        topBox.Add(sizer, 1, wxALIGN_RIGHT|wxALIGN_BOTTOM|wxBOTTOM|wxTOP, 10)

        self.SetAutoLayout(True)
        self.SetSizer(topBox)
        topBox.Fit(self)
        topBox.SetSizeHints(self)

        # Save same parameters for later use.
        self.parent = parent
        self.session = session

    def OnJoin(self, event):
        """Get the table and field selections and perform the join."""
        # left
        if self.choice_left_table is not None:
            i = self.choice_left_table.GetSelection()
            left_table = self.choice_left_table.GetClientData(i)
        else:
            left_table = self.left_table
        i = self.choice_left_field.GetSelection()
        left_field  = self.choice_left_field.GetString(i)
        # right
        i = self.choice_right_table.GetSelection()
        right_table = self.choice_right_table.GetClientData(i)
        i = self.choice_right_field.GetSelection()
        right_field  = self.choice_right_field.GetString(i)

        outer_join = self.check_outer_join.IsChecked()

        try:
            joined_table = TransientJoinedTable(self.session.TransientDB(),
                                                left_table, left_field,
                                                right_table, right_field,
                                                outer_join)
        except:
            dlg = wxMessageDialog(None,
                                  _('Join failed:\n  %s') % sys.exc_info()[1],
                                  _('Info'), wxOK|wxICON_ERROR)
            dlg.ShowModal()
            dlg.Destroy()
            return

        joined_table = self.session.AddTable(joined_table)
        if self.layer is not None:
            needed_rows = self.layer.ShapeStore().Table().NumRows()
            joined_rows = joined_table.NumRows()
            if needed_rows != joined_rows:
                msg = _("The joined table has %(joined)d rows but "
                        "it must have %(needed)d rows"
                        "to be used with the selected layer") \
                        % {"joined": joined_rows,
                           "needed": needed_rows}
                dlg = wxMessageDialog(None, msg, _('Join Failed'),
                                      wxOK|wxICON_ERROR)
                dlg.ShowModal()
                dlg.Destroy()
                return
            else:
                store = DerivedShapeStore(self.layer.ShapeStore(),
                                          joined_table)
                self.session.AddShapeStore(store)
                self.layer.SetShapeStore(store)
        else:
            name = joined_table.tablename
            dialog = QueryTableFrame(self.parent, name,
                                     _('Table: %s') % joined_table.Title(),
                                     joined_table)
            self.parent.add_dialog(name, dialog)
            dialog.Show(True)

        self.Close()

    def OnClose(self, event):
        """Close the dialog."""
        self.Close()

    def OnLeftTable(self, event):
        """Get the selected table and fill the field choice."""
        i = self.choice_left_table.GetSelection()
        table = self.choice_left_table.GetClientData(i)
        self.choice_left_field.Clear()
        if table is not None:
            for col in table.Columns():
                self.choice_left_field.Append(col.name, col)
        self.update_sensitivity()

    def OnRightTable(self, event):
        """Get the selected table and fill the field choice."""
        i = self.choice_right_table.GetSelection()
        table = self.choice_right_table.GetClientData(i)
        self.choice_right_field.Clear()
        if table is not None:
            for col in table.Columns():
                self.choice_right_field.Append(col.name, col)
        self.update_sensitivity()

    def update_sensitivity(self):
        if self.choice_left_table is not None:
            lsel = self.choice_left_table.GetSelection()
        else:
            lsel = sys.maxint
        sel = self.choice_right_table.GetSelection()
        self.button_join.Enable(sel > 0 and lsel > 0 and sel != lsel)
1	# Copyright (c) 2003 by Intevation GmbH
2	# Authors:
3	# Jonathan Coles <[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	import sys
9	from wxPython.wx import *
10
11	from Thuban import _
12
13	from Thuban.Model.transientdb import TransientJoinedTable
14	from Thuban.Model.data import DerivedShapeStore
15	from Thuban.UI.tableview import QueryTableFrame
16
17	ID_LEFT_TABLE = 4001
18	ID_RIGHT_TABLE = 4002
19
20	CHOICE_WIDTH = 150
21
22	class JoinDialog(wxDialog):
23
24	"""Table join dialog.
25
26	Join two tables (left/right) based on the user selected fields.
27	Opens a QueryTableFrame and registers the new table with the session.
28	"""
29
30	def __init__(self, parent, title, session, layer = None):
31	wxDialog.__init__(self, parent, -1, title,
32	style = wxDEFAULT_DIALOG_STYLE\|wxRESIZE_BORDER)
33	self.layer = layer
34
35	if not layer:
36	self.choice_left_table = wxChoice(self, ID_LEFT_TABLE)
37	width, height = self.choice_left_table.GetSizeTuple()
38	self.choice_left_table.SetSize(wxSize(CHOICE_WIDTH, height))
39	self.left_table = None
40	else:
41	self.choice_left_table = None
42	self.left_table = layer.ShapeStore().Table()
43
44	self.choice_right_table = wxChoice(self, ID_RIGHT_TABLE)
45	width, height = self.choice_right_table.GetSizeTuple()
46	self.choice_right_table.SetSize(wxSize(CHOICE_WIDTH, height))
47
48	self.choice_left_field = wxChoice(self, -1)
49	width, height = self.choice_left_field.GetSizeTuple()
50	self.choice_left_field.SetSize(wxSize(CHOICE_WIDTH, height))
51	self.choice_right_field = wxChoice(self, -1)
52	width, height = self.choice_right_field.GetSizeTuple()
53	self.choice_right_field.SetSize(wxSize(CHOICE_WIDTH, height))
54
55	self.button_join = wxButton(self, wxID_OK, _("Join"))
56	self.button_join.SetDefault()
57	self.button_close = wxButton(self, wxID_CANCEL, _("Close"))
58
59	EVT_BUTTON(self, wxID_OK, self.OnJoin)
60
61	if self.choice_left_table is not None:
62	self.choice_left_table.Append('Select ...', None)
63	self.choice_right_table.Append('Select ...', None)
64
65	for t in session.Tables():
66	if self.choice_left_table is not None:
67	self.choice_left_table.Append(t.Title(), t)
68
69	# If there is no choice_left_table then self.left_table will
70	# be the keft table so we can simply leave it out on the
71	# right side.
72	if t is not self.left_table:
73	self.choice_right_table.Append(t.Title(), t)
74
75	if self.choice_left_table is None:
76	for col in self.left_table.Columns():
77	self.choice_left_field.Append(col.name, col)
78
79	if self.choice_left_table is not None:
80	EVT_CHOICE(self, ID_LEFT_TABLE, self.OnLeftTable)
81	EVT_CHOICE(self, ID_RIGHT_TABLE, self.OnRightTable)
82
83	if self.choice_left_table is not None:
84	self.choice_left_table.SetSelection(0)
85	self.choice_right_table.SetSelection(0)
86	self.button_join.Enable(False)
87
88	topBox = wxBoxSizer(wxVERTICAL)
89
90	sizer = wxFlexGridSizer(2, 4)
91	sizer.Add(wxStaticText(self, -1, _("Table:")), 0, wxALL, 4)
92	if self.choice_left_table is not None:
93	sizer.Add(self.choice_left_table, 1,
94	wxEXPAND\|wxALL\|wxALIGN_CENTER_VERTICAL, 4)
95	else:
96	sizer.Add(wxStaticText(self, -1, self.left_table.Title()), 0,
97	wxALL, 4)
98
99	sizer.Add(wxStaticText(self, -1, _("Table:")), 0, wxALL, 4)
100	sizer.Add(self.choice_right_table, 1,
101	wxEXPAND\|wxALL\|wxALIGN_CENTER_VERTICAL, 4)
102	sizer.Add(wxStaticText(self, -1, _("Field:")), 0, wxALL, 4)
103	sizer.Add(self.choice_left_field, 1,
104	wxEXPAND\|wxALL\|wxALIGN_CENTER_VERTICAL, 4)
105	sizer.Add(wxStaticText(self, -1, _("Field:")), 0, wxALL, 4)
106	sizer.Add(self.choice_right_field, 1,
107	wxEXPAND\|wxALL\|wxALIGN_CENTER_VERTICAL, 4)
108
109	sizer.AddGrowableCol(1)
110	sizer.AddGrowableCol(3)
111
112	topBox.Add(sizer, 0, wxEXPAND\|wxALL, 4)
113
114	sizer = wxBoxSizer(wxHORIZONTAL)
115	self.check_outer_join = wxCheckBox(self,-1,
116	_("Outer Join (preserves left table records)"))
117	sizer.Add(self.check_outer_join, 1, wxALL,4)
118	topBox.Add(sizer, 0, wxALIGN_LEFT\|wxALIGN_TOP, 4)
119
120	sizer = wxBoxSizer(wxHORIZONTAL)
121	sizer.Add(self.button_join, 0, wxALIGN_RIGHT\|wxALIGN_BOTTOM\|wxRIGHT,
122	10)
123	sizer.Add(self.button_close, 0, wxALIGN_RIGHT\|wxALIGN_BOTTOM\|wxRIGHT,
124	10)
125
126	topBox.Add(sizer, 1, wxALIGN_RIGHT\|wxALIGN_BOTTOM\|wxBOTTOM\|wxTOP, 10)
127
128	self.SetAutoLayout(True)
129	self.SetSizer(topBox)
130	topBox.Fit(self)
131	topBox.SetSizeHints(self)
132
133	# Save same parameters for later use.
134	self.parent = parent
135	self.session = session
136
137	def OnJoin(self, event):
138	"""Get the table and field selections and perform the join."""
139	# left
140	if self.choice_left_table is not None:
141	i = self.choice_left_table.GetSelection()
142	left_table = self.choice_left_table.GetClientData(i)
143	else:
144	left_table = self.left_table
145	i = self.choice_left_field.GetSelection()
146	left_field = self.choice_left_field.GetString(i)
147	# right
148	i = self.choice_right_table.GetSelection()
149	right_table = self.choice_right_table.GetClientData(i)
150	i = self.choice_right_field.GetSelection()
151	right_field = self.choice_right_field.GetString(i)
152
153	outer_join = self.check_outer_join.IsChecked()
154
155	try:
156	joined_table = TransientJoinedTable(self.session.TransientDB(),
157	left_table, left_field,
158	right_table, right_field,
159	outer_join)
160	except:
161	dlg = wxMessageDialog(None,
162	_('Join failed:\n %s') % sys.exc_info()[1],
163	_('Info'), wxOK\|wxICON_ERROR)
164	dlg.ShowModal()
165	dlg.Destroy()
166	return
167
168	joined_table = self.session.AddTable(joined_table)
169	if self.layer is not None:
170	needed_rows = self.layer.ShapeStore().Table().NumRows()
171	joined_rows = joined_table.NumRows()
172	if needed_rows != joined_rows:
173	msg = _("The joined table has %(joined)d rows but "
174	"it must have %(needed)d rows"
175	"to be used with the selected layer") \
176	% {"joined": joined_rows,
177	"needed": needed_rows}
178	dlg = wxMessageDialog(None, msg, _('Join Failed'),
179	wxOK\|wxICON_ERROR)
180	dlg.ShowModal()
181	dlg.Destroy()
182	return
183	else:
184	store = DerivedShapeStore(self.layer.ShapeStore(),
185	joined_table)
186	self.session.AddShapeStore(store)
187	self.layer.SetShapeStore(store)
188	else:
189	name = joined_table.tablename
190	dialog = QueryTableFrame(self.parent, name,
191	_('Table: %s') % joined_table.Title(),
192	joined_table)
193	self.parent.add_dialog(name, dialog)
194	dialog.Show(True)
195
196	self.Close()
197
198	def OnClose(self, event):
199	"""Close the dialog."""
200	self.Close()
201
202	def OnLeftTable(self, event):
203	"""Get the selected table and fill the field choice."""
204	i = self.choice_left_table.GetSelection()
205	table = self.choice_left_table.GetClientData(i)
206	self.choice_left_field.Clear()
207	if table is not None:
208	for col in table.Columns():
209	self.choice_left_field.Append(col.name, col)
210	self.update_sensitivity()
211
212	def OnRightTable(self, event):
213	"""Get the selected table and fill the field choice."""
214	i = self.choice_right_table.GetSelection()
215	table = self.choice_right_table.GetClientData(i)
216	self.choice_right_field.Clear()
217	if table is not None:
218	for col in table.Columns():
219	self.choice_right_field.Append(col.name, col)
220	self.update_sensitivity()
221
222	def update_sensitivity(self):
223	if self.choice_left_table is not None:
224	lsel = self.choice_left_table.GetSelection()
225	else:
226	lsel = sys.maxint
227	sel = self.choice_right_table.GetSelection()
228	self.button_join.Enable(sel > 0 and lsel > 0 and sel != lsel)
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision