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# Copyright (c) 2001, 2002, 2003 by Intevation GmbH |
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# Authors: |
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# Bernhard Herzog <[email protected]> |
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# |
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# This program is free software under the GPL (>=v2) |
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# Read the file COPYING coming with Thuban for details. |
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|
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__version__ = "$Revision$" |
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|
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import os.path |
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|
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from Thuban import _ |
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|
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from wxPython.wx import * |
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from wxPython.grid import * |
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|
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from Thuban.Lib.connector import Publisher |
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from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \ |
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FIELDTYPE_STRING, table_to_dbf, table_to_csv |
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import view |
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from dialogs import ThubanFrame |
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|
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from messages import SHAPES_SELECTED, SESSION_REPLACED |
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from Thuban.Model.messages import TABLE_REMOVED, MAP_LAYERS_REMOVED |
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|
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wx_value_type_map = {FIELDTYPE_INT: wxGRID_VALUE_NUMBER, |
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FIELDTYPE_DOUBLE: wxGRID_VALUE_FLOAT, |
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FIELDTYPE_STRING: wxGRID_VALUE_STRING} |
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|
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ROW_SELECTED = "ROW_SELECTED" |
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|
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QUERY_KEY = 'S' |
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|
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class DataTable(wxPyGridTableBase): |
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|
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"""Wrapper around a Thuban table object suitable for a wxGrid""" |
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|
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def __init__(self, table = None): |
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wxPyGridTableBase.__init__(self) |
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self.num_cols = 0 |
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self.num_rows = 0 |
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self.columns = [] |
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self.table = None |
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self.SetTable(table) |
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|
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def SetTable(self, table): |
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self.table = table |
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self.num_cols = table.NumColumns() |
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self.num_rows = table.NumRows() |
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|
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self.columns = [] |
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for i in range(self.num_cols): |
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col = table.Column(i) |
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self.columns.append((col.name, wx_value_type_map[col.type])) |
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|
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# |
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# required methods for the wxPyGridTableBase interface |
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# |
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|
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def GetNumberRows(self): |
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return self.num_rows |
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|
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def GetNumberCols(self): |
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return self.num_cols |
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|
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def IsEmptyCell(self, row, col): |
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return 0 |
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|
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# Get/Set values in the table. The Python version of these |
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# methods can handle any data-type, (as long as the Editor and |
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# Renderer understands the type too,) not just strings as in the |
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# C++ version. |
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def GetValue(self, row, col): |
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record = self.table.ReadRowAsDict(row) |
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return record[self.columns[col][0]] |
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|
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def SetValue(self, row, col, value): |
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pass |
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|
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# |
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# Some optional methods |
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# |
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|
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# Called when the grid needs to display labels |
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def GetColLabelValue(self, col): |
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return self.columns[col][0] |
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|
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# Called to determine the kind of editor/renderer to use by |
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# default, doesn't necessarily have to be the same type used |
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# nativly by the editor/renderer if they know how to convert. |
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def GetTypeName(self, row, col): |
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return self.columns[col][1] |
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|
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# Called to determine how the data can be fetched and stored by the |
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# editor and renderer. This allows you to enforce some type-safety |
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# in the grid. |
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def CanGetValueAs(self, row, col, typeName): |
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# perhaps we should allow conversion int->double? |
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return self.GetTypeName(row, col) == typeName |
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|
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def CanSetValueAs(self, row, col, typeName): |
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return self.CanGetValueAs(row, col, typeName) |
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|
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|
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|
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class NullRenderer(wxPyGridCellRenderer): |
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|
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"""Renderer that draws NULL as a gray rectangle |
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|
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Other values are delegated to a normal renderer which is given as |
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the parameter to the constructor. |
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""" |
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|
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def __init__(self, non_null_renderer): |
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wxPyGridCellRenderer.__init__(self) |
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self.non_null_renderer = non_null_renderer |
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|
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def Draw(self, grid, attr, dc, rect, row, col, isSelected): |
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value = grid.table.GetValue(row, col) |
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if value is None: |
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dc.SetBackgroundMode(wxSOLID) |
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dc.SetBrush(wxBrush(wxColour(192, 192, 192), wxSOLID)) |
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dc.SetPen(wxTRANSPARENT_PEN) |
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dc.DrawRectangle(rect.x, rect.y, rect.width, rect.height) |
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else: |
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self.non_null_renderer.Draw(grid, attr, dc, rect, row, col, |
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isSelected) |
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|
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def GetBestSize(self, grid, attr, dc, row, col): |
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self.non_null_renderer.GetBestSize(grid, attr, dc, row, col) |
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|
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def Clone(self): |
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return NullRenderer(self.non_null_renderer) |
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|
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|
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class TableGrid(wxGrid, Publisher): |
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|
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"""A grid view for a Thuban table |
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|
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When rows are selected by the user the table issues ROW_SELECTED |
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messages. wx sends selection events even when the selection is |
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manipulated by code (instead of by the user) which usually lead to |
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ROW_SELECTED messages being sent in turn. Therefore sending messages |
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can be switched on and off with the allow_messages and |
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disallow_messages methods. |
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""" |
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|
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def __init__(self, parent, table = None): |
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wxGrid.__init__(self, parent, -1) |
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|
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self.allow_messages_count = 0 |
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|
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# keep track of which rows are selected. |
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self.rows = {} |
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|
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self.table = DataTable(table) |
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|
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# The second parameter means that the grid is to take ownership |
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# of the table and will destroy it when done. Otherwise you |
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# would need to keep a reference to it and call its Destroy |
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# method later. |
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self.SetTable(self.table, True) |
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|
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#self.SetMargins(0,0) |
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|
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# AutoSizeColumns would allow us to make the grid have optimal |
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# column widths automatically but it would cause a traversal of |
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# the entire table which for large .dbf files can take a very |
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# long time. |
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#self.AutoSizeColumns(False) |
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|
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self.SetSelectionMode(wxGrid.wxGridSelectRows) |
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|
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self.ToggleEventListeners(True) |
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EVT_GRID_RANGE_SELECT(self, self.OnRangeSelect) |
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EVT_GRID_SELECT_CELL(self, self.OnSelectCell) |
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|
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# Replace the normal renderers with our own versions which |
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# render NULL/None values specially |
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self.RegisterDataType(wxGRID_VALUE_STRING, |
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NullRenderer(wxGridCellStringRenderer()), None) |
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self.RegisterDataType(wxGRID_VALUE_NUMBER, |
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NullRenderer(wxGridCellNumberRenderer()), None) |
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self.RegisterDataType(wxGRID_VALUE_FLOAT, |
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NullRenderer(wxGridCellFloatRenderer()), None) |
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|
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def SetTableObject(self, table): |
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self.table.SetTable(table) |
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|
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def OnRangeSelect(self, event): |
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if self.handleSelectEvents: |
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self.rows = dict([(i, 0) for i in self.GetSelectedRows()]) |
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|
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# if we're selecting we need to include the selected range and |
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# make sure that the current row is also included, which may |
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# not be the case if you just click on a single row! |
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if event.Selecting(): |
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for i in range(event.GetTopRow(), event.GetBottomRow() + 1): |
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self.rows[i] = 0 |
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self.rows[event.GetTopLeftCoords().GetRow()] = 0 |
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|
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self.issue(ROW_SELECTED, self.rows.keys()) |
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|
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event.Skip() |
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|
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def OnSelectCell(self, event): |
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if self.handleSelectEvents: |
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self.issue(ROW_SELECTED, self.GetSelectedRows()) |
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event.Skip() |
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|
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def ToggleEventListeners(self, on): |
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self.handleSelectEvents = on |
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|
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def GetNumberSelected(self): |
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return len(self.rows) |
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|
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def disallow_messages(self): |
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"""Disallow messages to be send. |
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|
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This method only increases a counter so that calls to |
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disallow_messages and allow_messages can be nested. Only the |
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outermost calls will actually switch message sending on and off. |
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""" |
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self.allow_messages_count += 1 |
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|
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def allow_messages(self): |
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"""Allow messages to be send. |
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|
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This method only decreases a counter so that calls to |
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disallow_messages and allow_messages can be nested. Only the |
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outermost calls will actually switch message sending on and off. |
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""" |
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self.allow_messages_count -= 1 |
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|
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def issue(self, *args): |
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"""Issue a message unless disallowed. |
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|
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See the allow_messages and disallow_messages methods. |
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""" |
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if self.allow_messages_count == 0: |
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Publisher.issue(self, *args) |
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|
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|
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class LayerTableGrid(TableGrid): |
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|
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"""Table grid for the layer tables. |
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|
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The LayerTableGrid is basically the same as a TableGrid but it's |
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selection is usually coupled to the selected object in the map. |
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""" |
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|
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def select_shapes(self, layer, shapes): |
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"""Select the row corresponding to the specified shape and layer |
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|
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If layer is not the layer the table is associated with do |
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nothing. If shape or layer is None also do nothing. |
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""" |
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if layer is not None \ |
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and layer.table is self.table.table: |
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|
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self.disallow_messages() |
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try: |
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self.ClearSelection() |
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if len(shapes) > 0: |
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# |
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# keep track of the lowest id so we can make it |
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# the first visible item |
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# |
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first = shapes[0] |
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|
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for shape in shapes: |
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self.SelectRow(shape, True) |
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if shape < first: |
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first = shape |
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|
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self.SetGridCursor(first, 0) |
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self.MakeCellVisible(first, 0) |
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finally: |
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self.allow_messages() |
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|
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|
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class TableFrame(ThubanFrame): |
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|
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"""Frame that displays a Thuban table in a grid view""" |
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|
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def __init__(self, parent, name, title, table): |
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ThubanFrame.__init__(self, parent, name, title) |
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self.panel = wxPanel(self, -1) |
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|
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self.table = table |
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self.grid = self.make_grid(self.table) |
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self.app = self.parent.application |
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self.app.Subscribe(SESSION_REPLACED, self.close_on_session_replaced) |
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self.session = self.app.Session() |
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self.session.Subscribe(TABLE_REMOVED, self.close_on_table_removed) |
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|
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|
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def make_grid(self, table): |
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"""Return the table grid to use in the frame. |
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|
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The default implementation returns a TableGrid instance. |
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Override in derived classes to use different grid classes. |
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""" |
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return TableGrid(self, table) |
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|
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def OnClose(self, event): |
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self.app.Unsubscribe(SESSION_REPLACED, self.close_on_session_replaced) |
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self.session.Unsubscribe(TABLE_REMOVED, self.close_on_table_removed) |
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ThubanFrame.OnClose(self, event) |
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|
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def close_on_session_replaced(self, *args): |
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"""Subscriber for the SESSION_REPLACED messages. |
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|
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The table frame is tied to a session so close the window when |
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the session changes. |
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""" |
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self.Close() |
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|
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def close_on_table_removed(self, table): |
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"""Subscriber for the TABLE_REMOVED messages. |
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|
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The table frame is tied to a particular table so close the |
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window when the table is removed. |
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""" |
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if table is self.table: |
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self.Close() |
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|
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|
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ID_QUERY = 4001 |
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ID_EXPORT = 4002 |
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ID_COMBOVALUE = 4003 |
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|
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class QueryTableFrame(TableFrame): |
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|
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"""Frame that displays a table in a grid view and offers user actions |
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selection and export |
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|
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A QueryTableFrame is TableFrame whose selection is connected to the |
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selected object in a map. |
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""" |
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|
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def __init__(self, parent, name, title, table): |
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TableFrame.__init__(self, parent, name, title, table) |
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|
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self.combo_fields = wxComboBox(self.panel, -1, style=wxCB_READONLY) |
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self.choice_comp = wxChoice(self.panel, -1, |
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choices=["<", "<=", "==", "!=", ">=", ">"]) |
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self.combo_value = wxComboBox(self.panel, ID_COMBOVALUE) |
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self.choice_action = wxChoice(self.panel, -1, |
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choices=[_("Replace Selection"), |
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_("Refine Selection"), |
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_("Add to Selection")]) |
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|
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button_query = wxButton(self.panel, ID_QUERY, _("Query")) |
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button_saveas = wxButton(self.panel, ID_EXPORT, _("Export")) |
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|
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self.CreateStatusBar() |
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|
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self.grid.SetSize((400, 200)) |
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|
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self.combo_value.Append("") |
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for i in range(table.NumColumns()): |
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name = table.Column(i).name |
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self.combo_fields.Append(name) |
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self.combo_value.Append(name) |
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|
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# assume at least one field? |
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self.combo_fields.SetSelection(0) |
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self.combo_value.SetSelection(0) |
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self.choice_action.SetSelection(0) |
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self.choice_comp.SetSelection(0) |
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|
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self.grid.Reparent(self.panel) |
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|
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self.UpdateStatusText() |
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|
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topBox = wxBoxSizer(wxVERTICAL) |
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|
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sizer = wxStaticBoxSizer(wxStaticBox(self.panel, -1, |
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_("Selection")), |
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wxHORIZONTAL) |
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sizer.Add(self.combo_fields, 1, wxEXPAND|wxALL, 4) |
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sizer.Add(self.choice_comp, 0, wxALL, 4) |
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sizer.Add(self.combo_value, 1, wxEXPAND|wxALL, 4) |
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sizer.Add(self.choice_action, 0, wxALL, 4) |
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sizer.Add(button_query, 0, wxALL | wxALIGN_CENTER_VERTICAL, 4) |
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sizer.Add(40, 20, 0, wxALL, 4) |
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sizer.Add(button_saveas, 0, wxALL | wxALIGN_CENTER_VERTICAL, 4) |
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|
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topBox.Add(sizer, 0, wxEXPAND|wxALL, 4) |
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topBox.Add(self.grid, 1, wxEXPAND|wxALL, 0) |
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|
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self.panel.SetAutoLayout(True) |
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self.panel.SetSizer(topBox) |
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topBox.Fit(self.panel) |
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topBox.SetSizeHints(self.panel) |
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|
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panelSizer = wxBoxSizer(wxVERTICAL) |
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panelSizer.Add(self.panel, 1, wxEXPAND, 0) |
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self.SetAutoLayout(True) |
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self.SetSizer(panelSizer) |
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panelSizer.Fit(self) |
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panelSizer.SetSizeHints(self) |
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|
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self.grid.SetFocus() |
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|
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EVT_BUTTON(self, ID_QUERY, self.OnQuery) |
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EVT_BUTTON(self, ID_EXPORT, self.OnSaveAs) |
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EVT_KEY_DOWN(self.grid, self.OnKeyDown) |
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EVT_GRID_RANGE_SELECT(self.grid, self.OnGridSelectRange) |
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EVT_GRID_SELECT_CELL(self.grid, self.OnGridSelectCell) |
| 412 |
|
| 413 |
def UpdateStatusText(self): |
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self.SetStatusText(_("%i rows (%i selected), %i columns") |
| 415 |
% (self.grid.GetNumberRows(), |
| 416 |
self.grid.GetNumberSelected(), |
| 417 |
self.grid.GetNumberCols())) |
| 418 |
|
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def OnGridSelectRange(self, event): |
| 420 |
self.UpdateStatusText() |
| 421 |
event.Skip() |
| 422 |
|
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def OnGridSelectCell(self, event): |
| 424 |
self.UpdateStatusText() |
| 425 |
event.Skip() |
| 426 |
|
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def OnKeyDown(self, event): |
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"""Catch query key from grid""" |
| 429 |
if event.AltDown() and event.GetKeyCode() == ord(QUERY_KEY): |
| 430 |
self.combo_fields.SetFocus() |
| 431 |
self.combo_fields.refocus = True |
| 432 |
else: |
| 433 |
event.Skip() |
| 434 |
|
| 435 |
def OnQuery(self, event): |
| 436 |
wxBeginBusyCursor() |
| 437 |
try: |
| 438 |
|
| 439 |
text = self.combo_value.GetValue() |
| 440 |
if self.combo_value.GetSelection() < 1 \ |
| 441 |
or self.combo_value.FindString(text) == -1: |
| 442 |
value = text |
| 443 |
else: |
| 444 |
value = self.table.Column(text) |
| 445 |
|
| 446 |
ids = self.table.SimpleQuery( |
| 447 |
self.table.Column(self.combo_fields.GetStringSelection()), |
| 448 |
self.choice_comp.GetStringSelection(), |
| 449 |
value) |
| 450 |
|
| 451 |
choice = self.choice_action.GetSelection() |
| 452 |
|
| 453 |
# |
| 454 |
# what used to be nice code got became a bit ugly because |
| 455 |
# each time we select a row a message is sent to the grid |
| 456 |
# which we are listening for and then we send further |
| 457 |
# messages. |
| 458 |
# |
| 459 |
# now, we disable those listeners select everything but |
| 460 |
# the first item, reenable the listeners, and select |
| 461 |
# the first element, which causes everything to be |
| 462 |
# updated properly. |
| 463 |
# |
| 464 |
if ids: |
| 465 |
self.grid.ToggleEventListeners(False) |
| 466 |
|
| 467 |
if choice == 0: |
| 468 |
# Replace Selection |
| 469 |
self.grid.ClearSelection() |
| 470 |
elif choice == 1: |
| 471 |
# Refine Selection |
| 472 |
sel = self.get_selected() |
| 473 |
self.grid.ClearSelection() |
| 474 |
ids = filter(sel.has_key, ids) |
| 475 |
elif choice == 2: |
| 476 |
# Add to Selection |
| 477 |
pass |
| 478 |
|
| 479 |
# |
| 480 |
# select the rows (all but the first) |
| 481 |
# |
| 482 |
firsttime = True |
| 483 |
for id in ids: |
| 484 |
if firsttime: |
| 485 |
firsttime = False |
| 486 |
else: |
| 487 |
self.grid.SelectRow(id, True) |
| 488 |
|
| 489 |
self.grid.ToggleEventListeners(True) |
| 490 |
|
| 491 |
# |
| 492 |
# select the first row |
| 493 |
# |
| 494 |
if ids: |
| 495 |
self.grid.SelectRow(ids[0], True) |
| 496 |
|
| 497 |
finally: |
| 498 |
wxEndBusyCursor() |
| 499 |
|
| 500 |
def OnSaveAs(self, event): |
| 501 |
dlg = wxFileDialog(self, _("Export Table To"), ".", "", |
| 502 |
_("DBF Files (*.dbf)|*.dbf|") + |
| 503 |
_("CSV Files (*.csv)|*.csv|") + |
| 504 |
_("All Files (*.*)|*.*"), |
| 505 |
wxSAVE|wxOVERWRITE_PROMPT) |
| 506 |
if dlg.ShowModal() == wxID_OK: |
| 507 |
filename = dlg.GetPath() |
| 508 |
type = os.path.basename(filename).split('.')[-1:][0] |
| 509 |
dlg.Destroy() |
| 510 |
if type.upper() == "DBF": |
| 511 |
table_to_dbf(self.table, filename) |
| 512 |
elif type.upper() == 'CSV': |
| 513 |
table_to_csv(self.table, filename) |
| 514 |
else: |
| 515 |
dlg = wxMessageDialog(None, "Unsupported format: %s" % type, |
| 516 |
"Table Export", wxOK|wxICON_WARNING) |
| 517 |
dlg.ShowModal() |
| 518 |
dlg.Destroy() |
| 519 |
else: |
| 520 |
dlg.Destroy() |
| 521 |
|
| 522 |
def OnClose(self, event): |
| 523 |
TableFrame.OnClose(self, event) |
| 524 |
|
| 525 |
def get_selected(self): |
| 526 |
"""Return a dictionary of the selected rows. |
| 527 |
|
| 528 |
The dictionary has sthe indexes as keys.""" |
| 529 |
return dict([(i, 0) for i in self.grid.GetSelectedRows()]) |
| 530 |
|
| 531 |
class LayerTableFrame(QueryTableFrame): |
| 532 |
|
| 533 |
"""Frame that displays a layer table in a grid view |
| 534 |
|
| 535 |
A LayerTableFrame is a QueryTableFrame whose selection is connected to the |
| 536 |
selected object in a map. |
| 537 |
""" |
| 538 |
|
| 539 |
def __init__(self, parent, name, title, layer, table): |
| 540 |
QueryTableFrame.__init__(self, parent, name, title, table) |
| 541 |
self.layer = layer |
| 542 |
self.grid.Subscribe(ROW_SELECTED, self.rows_selected) |
| 543 |
self.parent.Subscribe(SHAPES_SELECTED, self.select_shapes) |
| 544 |
self.map = self.parent.Map() |
| 545 |
self.map.Subscribe(MAP_LAYERS_REMOVED, self.map_layers_removed) |
| 546 |
|
| 547 |
# if there is already a selection present, update the grid |
| 548 |
# accordingly |
| 549 |
sel = self.get_selected().keys() |
| 550 |
for i in sel: |
| 551 |
self.grid.SelectRow(i, True) |
| 552 |
|
| 553 |
def make_grid(self, table): |
| 554 |
"""Override the derived method to return a LayerTableGrid. |
| 555 |
""" |
| 556 |
return LayerTableGrid(self, table) |
| 557 |
|
| 558 |
def get_selected(self): |
| 559 |
"""Override the derived method to return a dictionary of the selected |
| 560 |
rows. |
| 561 |
""" |
| 562 |
return dict([(i, 0) for i in self.parent.SelectedShapes()]) |
| 563 |
|
| 564 |
def OnClose(self, event): |
| 565 |
"""Override the derived method to first unsubscribed.""" |
| 566 |
self.parent.Unsubscribe(SHAPES_SELECTED, self.select_shapes) |
| 567 |
self.grid.Unsubscribe(ROW_SELECTED, self.rows_selected) |
| 568 |
self.map.Unsubscribe(MAP_LAYERS_REMOVED, self.map_layers_removed) |
| 569 |
QueryTableFrame.OnClose(self, event) |
| 570 |
|
| 571 |
def select_shapes(self, layer, shapes): |
| 572 |
"""Subscribed to the SHAPES_SELECTED message. |
| 573 |
|
| 574 |
If shapes contains exactly one shape id, select that shape in |
| 575 |
the grid. Otherwise deselect all. |
| 576 |
""" |
| 577 |
self.grid.select_shapes(layer, shapes) |
| 578 |
|
| 579 |
def rows_selected(self, rows): |
| 580 |
"""Return the selected rows of the layer as they are returned |
| 581 |
by Layer.SelectShapes(). |
| 582 |
""" |
| 583 |
if self.layer is not None: |
| 584 |
self.parent.SelectShapes(self.layer, rows) |
| 585 |
|
| 586 |
def map_layers_removed(self, *args): |
| 587 |
"""Receiver for the map's MAP_LAYERS_REMOVED message |
| 588 |
|
| 589 |
Close the dialog if the layer whose table we're showing is not |
| 590 |
in the map anymore. |
| 591 |
""" |
| 592 |
if self.layer not in self.map.Layers(): |
| 593 |
self.Close() |
| 594 |
|
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