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	jonathan	888	# 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	bh	1072
8			import sys
9	jonathan	888	from wxPython.wx import *
10	bh	1072
11	jonathan	888	from Thuban import _
12	frank	1000
13			from Thuban.Model.transientdb import TransientJoinedTable
14	bh	1072	from Thuban.Model.data import DerivedShapeStore
15			from Thuban.UI.tableview import QueryTableFrame
16
17	frank	1000	ID_LEFT_TABLE = 4001
18			ID_RIGHT_TABLE = 4002
19	jonathan	888
20	frank	1000	CHOICE_WIDTH = 150
21
22	jonathan	888	class JoinDialog(wxDialog):
23	bh	1072
24	frank	1000	"""Table join dialog.
25	jonathan	888
26	frank	1000	Join two tables (left/right) based on the user selected fields.
27	jan	1022	Opens a QueryTableFrame and registers the new table with the session.
28	frank	1000	"""
29
30	jonathan	888	def __init__(self, parent, title, session, layer = None):
31			wxDialog.__init__(self, parent, -1, title,
32			style = wxDEFAULT_DIALOG_STYLE\|wxRESIZE_BORDER)
33	bh	1072	self.layer = layer
34	jonathan	888
35	bh	1072	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	frank	1000	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	jonathan	888
48	frank	1000	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	jonathan	888
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	frank	1000	EVT_BUTTON(self, wxID_OK, self.OnJoin)
60	jonathan	888
61	bh	1072	if self.choice_left_table is not None:
62			self.choice_left_table.Append('Select ...', None)
63	frank	1000	self.choice_right_table.Append('Select ...', None)
64	bh	1072
65	frank	1000	for t in session.Tables():
66	bh	1072	if self.choice_left_table is not None:
67	bh	1521	self.choice_left_table.Append(t.Title(), t)
68	jonathan	888
69	bh	1072	# 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	bh	1521	self.choice_right_table.Append(t.Title(), t)
74	bh	1072
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	frank	1000	EVT_CHOICE(self, ID_RIGHT_TABLE, self.OnRightTable)
82
83	bh	1072	if self.choice_left_table is not None:
84			self.choice_left_table.SetSelection(0)
85	frank	1000	self.choice_right_table.SetSelection(0)
86	jonathan	888	self.button_join.Enable(False)
87
88			topBox = wxBoxSizer(wxVERTICAL)
89
90			sizer = wxFlexGridSizer(2, 4)
91	frank	1000	sizer.Add(wxStaticText(self, -1, _("Table:")), 0, wxALL, 4)
92	bh	1072	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	frank	1000	sizer.Add(wxStaticText(self, -1, _("Table:")), 0, wxALL, 4)
100			sizer.Add(self.choice_right_table, 1,
101	bh	1072	wxEXPAND\|wxALL\|wxALIGN_CENTER_VERTICAL, 4)
102	frank	1000	sizer.Add(wxStaticText(self, -1, _("Field:")), 0, wxALL, 4)
103			sizer.Add(self.choice_left_field, 1,
104	bh	1072	wxEXPAND\|wxALL\|wxALIGN_CENTER_VERTICAL, 4)
105	frank	1000	sizer.Add(wxStaticText(self, -1, _("Field:")), 0, wxALL, 4)
106			sizer.Add(self.choice_right_field, 1,
107	bh	1072	wxEXPAND\|wxALL\|wxALIGN_CENTER_VERTICAL, 4)
108	jonathan	888
109			sizer.AddGrowableCol(1)
110			sizer.AddGrowableCol(3)
111
112	frank	1010	topBox.Add(sizer, 0, wxEXPAND\|wxALL, 4)
113	jonathan	888
114			sizer = wxBoxSizer(wxHORIZONTAL)
115	frank	1010	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	jonathan	888
120	frank	1010	sizer = wxBoxSizer(wxHORIZONTAL)
121	bh	1072	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	jonathan	888
126	frank	1010	topBox.Add(sizer, 1, wxALIGN_RIGHT\|wxALIGN_BOTTOM\|wxBOTTOM\|wxTOP, 10)
127
128	jonathan	888	self.SetAutoLayout(True)
129			self.SetSizer(topBox)
130			topBox.Fit(self)
131			topBox.SetSizeHints(self)
132
133	frank	1000	# Save same parameters for later use.
134			self.parent = parent
135			self.session = session
136	jonathan	888
137	frank	1000	def OnJoin(self, event):
138			"""Get the table and field selections and perform the join."""
139			# left
140	bh	1072	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	frank	1000	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	jonathan	888
153	frank	1010	outer_join = self.check_outer_join.IsChecked()
154
155	frank	1000	try:
156	bh	1072	joined_table = TransientJoinedTable(self.session.TransientDB(),
157			left_table, left_field,
158			right_table, right_field,
159			outer_join)
160	frank	1000	except:
161	jan	1022	dlg = wxMessageDialog(None,
162			_('Join failed:\n %s') % sys.exc_info()[1],
163			_('Info'), wxOK\|wxICON_ERROR)
164	frank	1000	dlg.ShowModal()
165	bh	1005	dlg.Destroy()
166	bh	1072	return
167	bh	1007
168	bh	1072	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	frank	1000	name = joined_table.tablename
190	jan	1022	dialog = QueryTableFrame(self.parent, name,
191	bh	1072	_('Table: %s') % joined_table.Title(),
192			joined_table)
193	frank	1000	self.parent.add_dialog(name, dialog)
194	jan	1035	dialog.Show(True)
195	frank	1000
196	bh	1072	self.Close()
197	frank	1000
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	bh	1072	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	jonathan	888
212	frank	1000	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	bh	1072	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	jonathan	888
222	bh	1072	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	frank	1000	sel = self.choice_right_table.GetSelection()
228	bh	1072	self.button_join.Enable(sel > 0 and lsel > 0 and sel != lsel)
Name	Value
svn:eol-style	native
svn:keywords	Author Date Id Revision