controls/CustomTable.py
author Laurent Bessard
Fri, 06 Dec 2013 13:24:28 +0100
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child 1571 486f94a8032c
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Added example of SFC simulating traffic lights
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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#This library is free software; you can redistribute it and/or
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#modify it under the terms of the GNU General Public
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#License as published by the Free Software Foundation; either
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#version 2.1 of the License, or (at your option) any later version.
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#
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#This library is distributed in the hope that it will be useful,
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#but WITHOUT ANY WARRANTY; without even the implied warranty of
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#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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#General Public License for more details.
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#
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#You should have received a copy of the GNU General Public
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#License along with this library; if not, write to the Free Software
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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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import wx
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import wx.grid
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if wx.Platform == '__WXMSW__':
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    ROW_HEIGHT = 20
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else:
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    ROW_HEIGHT = 28
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class CustomTable(wx.grid.PyGridTableBase):
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    """
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    A custom wx.grid.Grid Table using user supplied data
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    """
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    def __init__(self, parent, data, colnames):
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        # The base class must be initialized *first*
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        wx.grid.PyGridTableBase.__init__(self)
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        self.data = data
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        self.colnames = colnames
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        self.Highlights = {}
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        self.Parent = parent
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        # XXX
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        # we need to store the row length and collength to
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        # see if the table has changed size
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        self._rows = self.GetNumberRows()
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        self._cols = self.GetNumberCols()
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    def GetNumberCols(self):
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        return len(self.colnames)
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    def GetNumberRows(self):
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        return len(self.data)
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    def GetColLabelValue(self, col, translate=True):
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        if col < len(self.colnames):
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            if translate:
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                return _(self.colnames[col])
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            return self.colnames[col]
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    def GetRowLabelValue(self, row, translate=True):
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        return row
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    def GetValue(self, row, col):
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        if row < self.GetNumberRows():
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            return self.data[row].get(self.GetColLabelValue(col, False), "")
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    def SetValue(self, row, col, value):
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        if col < len(self.colnames):
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            self.data[row][self.GetColLabelValue(col, False)] = value
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    def GetValueByName(self, row, colname):
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        if row < self.GetNumberRows():
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            return self.data[row].get(colname)
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    def SetValueByName(self, row, colname, value):
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        if row < self.GetNumberRows():
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            self.data[row][colname] = value
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    def ResetView(self, grid):
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        """
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        (wx.grid.Grid) -> Reset the grid view.   Call this to
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        update the grid if rows and columns have been added or deleted
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        """
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        grid.CloseEditControl()
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        grid.BeginBatch()
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        for current, new, delmsg, addmsg in [
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            (self._rows, self.GetNumberRows(), wx.grid.GRIDTABLE_NOTIFY_ROWS_DELETED, wx.grid.GRIDTABLE_NOTIFY_ROWS_APPENDED),
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            (self._cols, self.GetNumberCols(), wx.grid.GRIDTABLE_NOTIFY_COLS_DELETED, wx.grid.GRIDTABLE_NOTIFY_COLS_APPENDED),
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        ]:
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            if new < current:
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                msg = wx.grid.GridTableMessage(self,delmsg,new,current-new)
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                grid.ProcessTableMessage(msg)
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            elif new > current:
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                msg = wx.grid.GridTableMessage(self,addmsg,new-current)
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                grid.ProcessTableMessage(msg)
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                self.UpdateValues(grid)
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        grid.EndBatch()
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        self._rows = self.GetNumberRows()
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        self._cols = self.GetNumberCols()
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        # update the column rendering scheme
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        self._updateColAttrs(grid)
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        # update the scrollbars and the displayed part of the grid
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        grid.AdjustScrollbars()
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        grid.ForceRefresh()
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    def UpdateValues(self, grid):
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        """Update all displayed values"""
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        # This sends an event to the grid table to update all of the values
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        msg = wx.grid.GridTableMessage(self, wx.grid.GRIDTABLE_REQUEST_VIEW_GET_VALUES)
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        grid.ProcessTableMessage(msg)
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    def _updateColAttrs(self, grid):
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        """
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        wx.grid.Grid -> update the column attributes to add the
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        appropriate renderer given the column name.
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        Otherwise default to the default renderer.
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        """
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        for row in range(self.GetNumberRows()):
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            row_highlights = self.Highlights.get(row, {})
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            for col in range(self.GetNumberCols()):
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                colname = self.GetColLabelValue(col, False)
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                grid.SetReadOnly(row, col, True)
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                grid.SetCellEditor(row, col, None)
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                grid.SetCellRenderer(row, col, None)
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                highlight_colours = row_highlights.get(colname.lower(), [(wx.WHITE, wx.BLACK)])[-1]
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                grid.SetCellBackgroundColour(row, col, highlight_colours[0])
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                grid.SetCellTextColour(row, col, highlight_colours[1])
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            self.ResizeRow(grid, row)
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    def ResizeRow(self, grid, row):
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        if grid.GetRowSize(row) < ROW_HEIGHT:
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            grid.SetRowMinimalHeight(row, ROW_HEIGHT)
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            grid.AutoSizeRow(row, False)
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    def SetData(self, data):
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        self.data = data
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    def GetData(self):
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        return self.data
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    def GetCurrentIndex(self):
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        return self.CurrentIndex
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    def SetCurrentIndex(self, index):
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        self.CurrentIndex = index
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    def AppendRow(self, row_content):
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        self.data.append(row_content)
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    def InsertRow(self, index, row_content):
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        self.data.insert(index, row_content)
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    def MoveRow(self, row_index, move):
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        new_index = max(0, min(row_index + move, len(self.data) - 1))
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        if new_index != row_index:
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            self.data.insert(new_index, self.data.pop(row_index))
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        return new_index
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    def RemoveRow(self, row_index):
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        self.data.pop(row_index)
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    def GetRow(self, row_index):
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        return self.data[row_index]
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    def Empty(self):
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        self.data = []
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    def AddHighlight(self, infos, highlight_type):
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        row_highlights = self.Highlights.setdefault(infos[0], {})
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        col_highlights = row_highlights.setdefault(infos[1], [])
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        col_highlights.append(highlight_type)
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    def RemoveHighlight(self, infos, highlight_type):
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        row_highlights = self.Highlights.get(infos[0])
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        if row_highlights is not None:
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            col_highlights = row_highlights.get(infos[1])
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            if col_highlights is not None and highlight_type in col_highlights:
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                col_highlights.remove(highlight_type)
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            if len(col_highlights) == 0:
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                row_highlights.pop(infos[1])
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    def ClearHighlights(self, highlight_type=None):
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        if highlight_type is None:
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            self.Highlights = {}
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        else:
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            for row, row_highlights in self.Highlights.iteritems():
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                row_items = row_highlights.items()
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                for col, col_highlights in row_items:
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                    if highlight_type in col_highlights:
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                        col_highlights.remove(highlight_type)
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                    if len(col_highlights) == 0:
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                        row_highlights.pop(col)