FM / guido

/usr/lib64/python2.6/Demo/tkinter/guido/

/usr/lib64/python2.6/Demo/tkinter/guido

Name	Size	Mode	Actions
AttrDialog.py	14340	0644	edit dl rm
AttrDialog.pyc	18833	0644	edit dl rm
AttrDialog.pyo	18833	0644	edit dl rm
brownian.py	1091	0644	edit dl rm
brownian.pyc	1635	0644	edit dl rm
brownian.pyo	1635	0644	edit dl rm
brownian2.py	1379	0644	edit dl rm
brownian2.pyc	1797	0644	edit dl rm
brownian2.pyo	1797	0644	edit dl rm
canvasevents.py	6580	0644	edit dl rm
canvasevents.pyc	10742	0644	edit dl rm
canvasevents.pyo	10742	0644	edit dl rm
dialog.py	3205	0755	edit dl rm
dialog.pyc	3193	0644	edit dl rm
dialog.pyo	3193	0644	edit dl rm
electrons.py	2326	0755	edit dl rm
electrons.pyc	2406	0644	edit dl rm
electrons.pyo	2406	0644	edit dl rm
hanoi.py	4649	0644	edit dl rm
hanoi.pyc	3933	0644	edit dl rm
hanoi.pyo	3933	0644	edit dl rm
hello.py	331	0644	edit dl rm
hello.pyc	701	0644	edit dl rm
hello.pyo	701	0644	edit dl rm
imagedraw.py	509	0644	edit dl rm
imagedraw.pyc	1155	0644	edit dl rm
imagedraw.pyo	1155	0644	edit dl rm
imageview.py	205	0644	edit dl rm
imageview.pyc	570	0644	edit dl rm
imageview.pyo	570	0644	edit dl rm
kill.py	3888	0755	edit dl rm
kill.pyc	4934	0644	edit dl rm
kill.pyo	4934	0644	edit dl rm
listtree.py	991	0644	edit dl rm
listtree.pyc	1539	0644	edit dl rm
listtree.pyo	1539	0644	edit dl rm
ManPage.py	6856	0644	edit dl rm
ManPage.pyc	6477	0644	edit dl rm
ManPage.pyo	6477	0644	edit dl rm
mbox.py	7481	0755	edit dl rm
mbox.pyc	8417	0644	edit dl rm
mbox.pyo	8417	0644	edit dl rm
MimeViewer.py	4501	0755	edit dl rm
MimeViewer.pyc	4993	0644	edit dl rm
MimeViewer.pyo	4993	0644	edit dl rm
newmenubardemo.py	1210	0644	edit dl rm
newmenubardemo.pyc	1626	0644	edit dl rm
newmenubardemo.pyo	1626	0644	edit dl rm
optionmenu.py	441	0644	edit dl rm
optionmenu.pyc	594	0644	edit dl rm
optionmenu.pyo	594	0644	edit dl rm
paint.py	1898	0644	edit dl rm
paint.pyc	2250	0644	edit dl rm
paint.pyo	2250	0644	edit dl rm
rmt.py	4495	0755	edit dl rm
rmt.pyc	5058	0644	edit dl rm
rmt.pyo	5058	0644	edit dl rm
ShellWindow.py	4172	0644	edit dl rm
ShellWindow.pyc	5635	0644	edit dl rm
ShellWindow.pyo	5635	0644	edit dl rm
solitaire.py	17793	0755	edit dl rm
solitaire.pyc	20998	0644	edit dl rm
solitaire.pyo	20998	0644	edit dl rm
sortvisu.py	19324	0644	edit dl rm
sortvisu.pyc	23886	0644	edit dl rm
sortvisu.pyo	23886	0644	edit dl rm
ss1.py	26183	0644	edit dl rm
ss1.pyc	32726	0644	edit dl rm
ss1.pyo	32084	0644	edit dl rm
svkill.py	4868	0755	edit dl rm
svkill.pyc	5951	0644	edit dl rm
svkill.pyo	5951	0644	edit dl rm
switch.py	1559	0644	edit dl rm
switch.pyc	2930	0644	edit dl rm
switch.pyo	2930	0644	edit dl rm
tkman.py	9008	0755	edit dl rm
tkman.pyc	9144	0644	edit dl rm
tkman.pyo	9144	0644	edit dl rm
wish.py	623	0644	edit dl rm
wish.pyc	746	0644	edit dl rm
wish.pyo	746	0644	edit dl rm

Edit: /usr/lib64/python2.6/Demo/tkinter/guido/ss1.py (26183B)

"""SS1 -- a spreadsheet."""

import os
import re
import sys
import cgi
import rexec
from xml.parsers import expat

LEFT, CENTER, RIGHT = "LEFT", "CENTER", "RIGHT"

def ljust(x, n):
    return x.ljust(n)
def center(x, n):
    return x.center(n)
def rjust(x, n):
    return x.rjust(n)
align2action = {LEFT: ljust, CENTER: center, RIGHT: rjust}

align2xml = {LEFT: "left", CENTER: "center", RIGHT: "right"}
xml2align = {"left": LEFT, "center": CENTER, "right": RIGHT}

align2anchor = {LEFT: "w", CENTER: "center", RIGHT: "e"}

def sum(seq):
    total = 0
    for x in seq:
        if x is not None:
            total += x
    return total

class Sheet:

def __init__(self):
        self.cells = {} # {(x, y): cell, ...}
        self.rexec = rexec.RExec()
        m = self.rexec.add_module('__main__')
        m.cell = self.cellvalue
        m.cells = self.multicellvalue
        m.sum = sum

def cellvalue(self, x, y):
        cell = self.getcell(x, y)
        if hasattr(cell, 'recalc'):
            return cell.recalc(self.rexec)
        else:
            return cell

def multicellvalue(self, x1, y1, x2, y2):
        if x1 > x2:
            x1, x2 = x2, x1
        if y1 > y2:
            y1, y2 = y2, y1
        seq = []
        for y in range(y1, y2+1):
            for x in range(x1, x2+1):
                seq.append(self.cellvalue(x, y))
        return seq

def getcell(self, x, y):
        return self.cells.get((x, y))

def setcell(self, x, y, cell):
        assert x > 0 and y > 0
        assert isinstance(cell, BaseCell)
        self.cells[x, y] = cell

def clearcell(self, x, y):
        try:
            del self.cells[x, y]
        except KeyError:
            pass

def clearcells(self, x1, y1, x2, y2):
        for xy in self.selectcells(x1, y1, x2, y2):
            del self.cells[xy]

def clearrows(self, y1, y2):
        self.clearcells(0, y1, sys.maxint, y2)

def clearcolumns(self, x1, x2):
        self.clearcells(x1, 0, x2, sys.maxint)

def selectcells(self, x1, y1, x2, y2):
        if x1 > x2:
            x1, x2 = x2, x1
        if y1 > y2:
            y1, y2 = y2, y1
        return [(x, y) for x, y in self.cells
                if x1 <= x <= x2 and y1 <= y <= y2]

def movecells(self, x1, y1, x2, y2, dx, dy):
        if dx == 0 and dy == 0:
            return
        if x1 > x2:
            x1, x2 = x2, x1
        if y1 > y2:
            y1, y2 = y2, y1
        assert x1+dx > 0 and y1+dy > 0
        new = {}
        for x, y in self.cells:
            cell = self.cells[x, y]
            if hasattr(cell, 'renumber'):
                cell = cell.renumber(x1, y1, x2, y2, dx, dy)
            if x1 <= x <= x2 and y1 <= y <= y2:
                x += dx
                y += dy
            new[x, y] = cell
        self.cells = new

def insertrows(self, y, n):
        assert n > 0
        self.movecells(0, y, sys.maxint, sys.maxint, 0, n)

def deleterows(self, y1, y2):
        if y1 > y2:
            y1, y2 = y2, y1
        self.clearrows(y1, y2)
        self.movecells(0, y2+1, sys.maxint, sys.maxint, 0, y1-y2-1)

def insertcolumns(self, x, n):
        assert n > 0
        self.movecells(x, 0, sys.maxint, sys.maxint, n, 0)

def deletecolumns(self, x1, x2):
        if x1 > x2:
            x1, x2 = x2, x1
        self.clearcells(x1, x2)
        self.movecells(x2+1, 0, sys.maxint, sys.maxint, x1-x2-1, 0)

def getsize(self):
        maxx = maxy = 0
        for x, y in self.cells:
            maxx = max(maxx, x)
            maxy = max(maxy, y)
        return maxx, maxy

def reset(self):
        for cell in self.cells.itervalues():
            if hasattr(cell, 'reset'):
                cell.reset()

def recalc(self):
        self.reset()
        for cell in self.cells.itervalues():
            if hasattr(cell, 'recalc'):
                cell.recalc(self.rexec)

def display(self):
        maxx, maxy = self.getsize()
        width, height = maxx+1, maxy+1
        colwidth = [1] * width
        full = {}
        # Add column heading labels in row 0
        for x in range(1, width):
            full[x, 0] = text, alignment = colnum2name(x), RIGHT
            colwidth[x] = max(colwidth[x], len(text))
        # Add row labels in column 0
        for y in range(1, height):
            full[0, y] = text, alignment = str(y), RIGHT
            colwidth[0] = max(colwidth[0], len(text))
        # Add sheet cells in columns with x>0 and y>0
        for (x, y), cell in self.cells.iteritems():
            if x <= 0 or y <= 0:
                continue
            if hasattr(cell, 'recalc'):
                cell.recalc(self.rexec)
            if hasattr(cell, 'format'):
                text, alignment = cell.format()
                assert isinstance(text, str)
                assert alignment in (LEFT, CENTER, RIGHT)
            else:
                text = str(cell)
                if isinstance(cell, str):
                    alignment = LEFT
                else:
                    alignment = RIGHT
            full[x, y] = (text, alignment)
            colwidth[x] = max(colwidth[x], len(text))
        # Calculate the horizontal separator line (dashes and dots)
        sep = ""
        for x in range(width):
            if sep:
                sep += "+"
            sep += "-"*colwidth[x]
        # Now print The full grid
        for y in range(height):
            line = ""
            for x in range(width):
                text, alignment = full.get((x, y)) or ("", LEFT)
                text = align2action[alignment](text, colwidth[x])
                if line:
                    line += '|'
                line += text
            print line
            if y == 0:
                print sep

def xml(self):
        out = ['<spreadsheet>']
        for (x, y), cell in self.cells.iteritems():
            if hasattr(cell, 'xml'):
                cellxml = cell.xml()
            else:
                cellxml = '<value>%s</value>' % cgi.escape(cell)
            out.append('<cell row="%s" col="%s">\n  %s\n</cell>' %
                       (y, x, cellxml))
        out.append('</spreadsheet>')
        return '\n'.join(out)

def save(self, filename):
        text = self.xml()
        f = open(filename, "w")
        f.write(text)
        if text and not text.endswith('\n'):
            f.write('\n')
        f.close()

def load(self, filename):
        f = open(filename, 'r')
        SheetParser(self).parsefile(f)
        f.close()

class SheetParser:

def __init__(self, sheet):
        self.sheet = sheet

def parsefile(self, f):
        parser = expat.ParserCreate()
        parser.StartElementHandler = self.startelement
        parser.EndElementHandler = self.endelement
        parser.CharacterDataHandler = self.data
        parser.ParseFile(f)

def startelement(self, tag, attrs):
        method = getattr(self, 'start_'+tag, None)
        if method:
            for key, value in attrs.iteritems():
                attrs[key] = str(value) # XXX Convert Unicode to 8-bit
            method(attrs)
        self.texts = []

def data(self, text):
        text = str(text) # XXX Convert Unicode to 8-bit
        self.texts.append(text)

def endelement(self, tag):
        method = getattr(self, 'end_'+tag, None)
        if method:
            method("".join(self.texts))

def start_cell(self, attrs):
        self.y = int(attrs.get("row"))
        self.x = int(attrs.get("col"))

def start_value(self, attrs):
        self.fmt = attrs.get('format')
        self.alignment = xml2align.get(attrs.get('align'))

start_formula = start_value

def end_int(self, text):
        try:
            self.value = int(text)
        except:
            self.value = None

def end_long(self, text):
        try:
            self.value = long(text)
        except:
            self.value = None

def end_double(self, text):
        try:
            self.value = float(text)
        except:
            self.value = None

def end_complex(self, text):
        try:
            self.value = complex(text)
        except:
            self.value = None

def end_string(self, text):
        try:
            self.value = text
        except:
            self.value = None

def end_value(self, text):
        if isinstance(self.value, BaseCell):
            self.cell = self.value
        elif isinstance(self.value, str):
            self.cell = StringCell(self.value,
                                   self.fmt or "%s",
                                   self.alignment or LEFT)
        else:
            self.cell = NumericCell(self.value,
                                    self.fmt or "%s",
                                    self.alignment or RIGHT)

def end_formula(self, text):
        self.cell = FormulaCell(text,
                                self.fmt or "%s",
                                self.alignment or RIGHT)

def end_cell(self, text):
        self.sheet.setcell(self.x, self.y, self.cell)

class BaseCell:
    __init__ = None # Must provide
    """Abstract base class for sheet cells.

Subclasses may but needn't provide the following APIs:

cell.reset() -- prepare for recalculation
    cell.recalc(rexec) -> value -- recalculate formula
    cell.format() -> (value, alignment) -- return formatted value
    cell.xml() -> string -- return XML
    """

class NumericCell(BaseCell):

def __init__(self, value, fmt="%s", alignment=RIGHT):
        assert isinstance(value, (int, long, float, complex))
        assert alignment in (LEFT, CENTER, RIGHT)
        self.value = value
        self.fmt = fmt
        self.alignment = alignment

def recalc(self, rexec):
        return self.value

def format(self):
        try:
            text = self.fmt % self.value
        except:
            text = str(self.value)
        return text, self.alignment

def xml(self):
        method = getattr(self, '_xml_' + type(self.value).__name__)
        return '<value align="%s" format="%s">%s</value>' % (
                align2xml[self.alignment],
                self.fmt,
                method())

def _xml_int(self):
        if -2**31 <= self.value < 2**31:
            return '<int>%s</int>' % self.value
        else:
            return self._xml_long()

def _xml_long(self):
        return '<long>%s</long>' % self.value

def _xml_float(self):
        return '<double>%s</double>' % repr(self.value)

def _xml_complex(self):
        return '<complex>%s</double>' % repr(self.value)

class StringCell(BaseCell):

def __init__(self, text, fmt="%s", alignment=LEFT):
        assert isinstance(text, (str, unicode))
        assert alignment in (LEFT, CENTER, RIGHT)
        self.text = text
        self.fmt = fmt
        self.alignment = alignment

def recalc(self, rexec):
        return self.text

def format(self):
        return self.text, self.alignment

def xml(self):
        s = '<value align="%s" format="%s"><string>%s</string></value>'
        return s % (
            align2xml[self.alignment],
            self.fmt,
            cgi.escape(self.text))

class FormulaCell(BaseCell):

def __init__(self, formula, fmt="%s", alignment=RIGHT):
        assert alignment in (LEFT, CENTER, RIGHT)
        self.formula = formula
        self.translated = translate(self.formula)
        self.fmt = fmt
        self.alignment = alignment
        self.reset()

def reset(self):
        self.value = None

def recalc(self, rexec):
        if self.value is None:
            try:
                # A hack to evaluate expressions using true division
                rexec.r_exec("from __future__ import division\n" +
                             "__value__ = eval(%s)" % repr(self.translated))
                self.value = rexec.r_eval("__value__")
            except:
                exc = sys.exc_info()[0]
                if hasattr(exc, "__name__"):
                    self.value = exc.__name__
                else:
                    self.value = str(exc)
        return self.value

def format(self):
        try:
            text = self.fmt % self.value
        except:
            text = str(self.value)
        return text, self.alignment

def xml(self):
        return '<formula align="%s" format="%s">%s</formula>' % (
            align2xml[self.alignment],
            self.fmt,
            self.formula)

def renumber(self, x1, y1, x2, y2, dx, dy):
        out = []
        for part in re.split('(\w+)', self.formula):
            m = re.match('^([A-Z]+)([1-9][0-9]*)$', part)
            if m is not None:
                sx, sy = m.groups()
                x = colname2num(sx)
                y = int(sy)
                if x1 <= x <= x2 and y1 <= y <= y2:
                    part = cellname(x+dx, y+dy)
            out.append(part)
        return FormulaCell("".join(out), self.fmt, self.alignment)

def translate(formula):
    """Translate a formula containing fancy cell names to valid Python code.

Examples:
        B4 -> cell(2, 4)
        B4:Z100 -> cells(2, 4, 26, 100)
    """
    out = []
    for part in re.split(r"(\w+(?::\w+)?)", formula):
        m = re.match(r"^([A-Z]+)([1-9][0-9]*)(?::([A-Z]+)([1-9][0-9]*))?$", part)
        if m is None:
            out.append(part)
        else:
            x1, y1, x2, y2 = m.groups()
            x1 = colname2num(x1)
            if x2 is None:
                s = "cell(%s, %s)" % (x1, y1)
            else:
                x2 = colname2num(x2)
                s = "cells(%s, %s, %s, %s)" % (x1, y1, x2, y2)
            out.append(s)
    return "".join(out)

def cellname(x, y):
    "Translate a cell coordinate to a fancy cell name (e.g. (1, 1)->'A1')."
    assert x > 0 # Column 0 has an empty name, so can't use that
    return colnum2name(x) + str(y)

def colname2num(s):
    "Translate a column name to number (e.g. 'A'->1, 'Z'->26, 'AA'->27)."
    s = s.upper()
    n = 0
    for c in s:
        assert 'A' <= c <= 'Z'
        n = n*26 + ord(c) - ord('A') + 1
    return n

def colnum2name(n):
    "Translate a column number to name (e.g. 1->'A', etc.)."
    assert n > 0
    s = ""
    while n:
        n, m = divmod(n-1, 26)
        s = chr(m+ord('A')) + s
    return s

import Tkinter as Tk

class SheetGUI:

"""Beginnings of a GUI for a spreadsheet.

TO DO:
    - clear multiple cells
    - Insert, clear, remove rows or columns
    - Show new contents while typing
    - Scroll bars
    - Grow grid when window is grown
    - Proper menus
    - Undo, redo
    - Cut, copy and paste
    - Formatting and alignment
    """

def __init__(self, filename="sheet1.xml", rows=10, columns=5):
        """Constructor.

Load the sheet from the filename argument.
        Set up the Tk widget tree.
        """
        # Create and load the sheet
        self.filename = filename
        self.sheet = Sheet()
        if os.path.isfile(filename):
            self.sheet.load(filename)
        # Calculate the needed grid size
        maxx, maxy = self.sheet.getsize()
        rows = max(rows, maxy)
        columns = max(columns, maxx)
        # Create the widgets
        self.root = Tk.Tk()
        self.root.wm_title("Spreadsheet: %s" % self.filename)
        self.beacon = Tk.Label(self.root, text="A1",
                               font=('helvetica', 16, 'bold'))
        self.entry = Tk.Entry(self.root)
        self.savebutton = Tk.Button(self.root, text="Save",
                                    command=self.save)
        self.cellgrid = Tk.Frame(self.root)
        # Configure the widget lay-out
        self.cellgrid.pack(side="bottom", expand=1, fill="both")
        self.beacon.pack(side="left")
        self.savebutton.pack(side="right")
        self.entry.pack(side="left", expand=1, fill="x")
        # Bind some events
        self.entry.bind("<Return>", self.return_event)
        self.entry.bind("<Shift-Return>", self.shift_return_event)
        self.entry.bind("<Tab>", self.tab_event)
        self.entry.bind("<Shift-Tab>", self.shift_tab_event)
        self.entry.bind("<Delete>", self.delete_event)
        self.entry.bind("<Escape>", self.escape_event)
        # Now create the cell grid
        self.makegrid(rows, columns)
        # Select the top-left cell
        self.currentxy = None
        self.cornerxy = None
        self.setcurrent(1, 1)
        # Copy the sheet cells to the GUI cells
        self.sync()

def delete_event(self, event):
        if self.cornerxy != self.currentxy and self.cornerxy is not None:
            self.sheet.clearcells(*(self.currentxy + self.cornerxy))
        else:
            self.sheet.clearcell(*self.currentxy)
        self.sync()
        self.entry.delete(0, 'end')
        return "break"

def escape_event(self, event):
        x, y = self.currentxy
        self.load_entry(x, y)

def load_entry(self, x, y):
        cell = self.sheet.getcell(x, y)
        if cell is None:
            text = ""
        elif isinstance(cell, FormulaCell):
            text = '=' + cell.formula
        else:
            text, alignment = cell.format()
        self.entry.delete(0, 'end')
        self.entry.insert(0, text)
        self.entry.selection_range(0, 'end')

def makegrid(self, rows, columns):
        """Helper to create the grid of GUI cells.

The edge (x==0 or y==0) is filled with labels; the rest is real cells.
        """
        self.rows = rows
        self.columns = columns
        self.gridcells = {}
        # Create the top left corner cell (which selects all)
        cell = Tk.Label(self.cellgrid, relief='raised')
        cell.grid_configure(column=0, row=0, sticky='NSWE')
        cell.bind("<ButtonPress-1>", self.selectall)
        # Create the top row of labels, and confiure the grid columns
        for x in range(1, columns+1):
            self.cellgrid.grid_columnconfigure(x, minsize=64)
            cell = Tk.Label(self.cellgrid, text=colnum2name(x), relief='raised')
            cell.grid_configure(column=x, row=0, sticky='WE')
            self.gridcells[x, 0] = cell
            cell.__x = x
            cell.__y = 0
            cell.bind("<ButtonPress-1>", self.selectcolumn)
            cell.bind("<B1-Motion>", self.extendcolumn)
            cell.bind("<ButtonRelease-1>", self.extendcolumn)
            cell.bind("<Shift-Button-1>", self.extendcolumn)
        # Create the leftmost column of labels
        for y in range(1, rows+1):
            cell = Tk.Label(self.cellgrid, text=str(y), relief='raised')
            cell.grid_configure(column=0, row=y, sticky='WE')
            self.gridcells[0, y] = cell
            cell.__x = 0
            cell.__y = y
            cell.bind("<ButtonPress-1>", self.selectrow)
            cell.bind("<B1-Motion>", self.extendrow)
            cell.bind("<ButtonRelease-1>", self.extendrow)
            cell.bind("<Shift-Button-1>", self.extendrow)
        # Create the real cells
        for x in range(1, columns+1):
            for y in range(1, rows+1):
                cell = Tk.Label(self.cellgrid, relief='sunken',
                                bg='white', fg='black')
                cell.grid_configure(column=x, row=y, sticky='NSWE')
                self.gridcells[x, y] = cell
                cell.__x = x
                cell.__y = y
                # Bind mouse events
                cell.bind("<ButtonPress-1>", self.press)
                cell.bind("<B1-Motion>", self.motion)
                cell.bind("<ButtonRelease-1>", self.release)
                cell.bind("<Shift-Button-1>", self.release)

def selectall(self, event):
        self.setcurrent(1, 1)
        self.setcorner(sys.maxint, sys.maxint)

def selectcolumn(self, event):
        x, y = self.whichxy(event)
        self.setcurrent(x, 1)
        self.setcorner(x, sys.maxint)

def extendcolumn(self, event):
        x, y = self.whichxy(event)
        if x > 0:
            self.setcurrent(self.currentxy[0], 1)
            self.setcorner(x, sys.maxint)

def selectrow(self, event):
        x, y = self.whichxy(event)
        self.setcurrent(1, y)
        self.setcorner(sys.maxint, y)

def extendrow(self, event):
        x, y = self.whichxy(event)
        if y > 0:
            self.setcurrent(1, self.currentxy[1])
            self.setcorner(sys.maxint, y)

def press(self, event):
        x, y = self.whichxy(event)
        if x > 0 and y > 0:
            self.setcurrent(x, y)

def motion(self, event):
        x, y = self.whichxy(event)
        if x > 0 and y > 0:
            self.setcorner(x, y)

release = motion

def whichxy(self, event):
        w = self.cellgrid.winfo_containing(event.x_root, event.y_root)
        if w is not None and isinstance(w, Tk.Label):
            try:
                return w.__x, w.__y
            except AttributeError:
                pass
        return 0, 0

def save(self):
        self.sheet.save(self.filename)

def setcurrent(self, x, y):
        "Make (x, y) the current cell."
        if self.currentxy is not None:
            self.change_cell()
        self.clearfocus()
        self.beacon['text'] = cellname(x, y)
        self.load_entry(x, y)
        self.entry.focus_set()
        self.currentxy = x, y
        self.cornerxy = None
        gridcell = self.gridcells.get(self.currentxy)
        if gridcell is not None:
            gridcell['bg'] = 'yellow'

def setcorner(self, x, y):
        if self.currentxy is None or self.currentxy == (x, y):
            self.setcurrent(x, y)
            return
        self.clearfocus()
        self.cornerxy = x, y
        x1, y1 = self.currentxy
        x2, y2 = self.cornerxy or self.currentxy
        if x1 > x2:
            x1, x2 = x2, x1
        if y1 > y2:
            y1, y2 = y2, y1
        for (x, y), cell in self.gridcells.iteritems():
            if x1 <= x <= x2 and y1 <= y <= y2:
                cell['bg'] = 'lightBlue'
        gridcell = self.gridcells.get(self.currentxy)
        if gridcell is not None:
            gridcell['bg'] = 'yellow'
        self.setbeacon(x1, y1, x2, y2)

def setbeacon(self, x1, y1, x2, y2):
        if x1 == y1 == 1 and x2 == y2 == sys.maxint:
            name = ":"
        elif (x1, x2) == (1, sys.maxint):
            if y1 == y2:
                name = "%d" % y1
            else:
                name = "%d:%d" % (y1, y2)
        elif (y1, y2) == (1, sys.maxint):
            if x1 == x2:
                name = "%s" % colnum2name(x1)
            else:
                name = "%s:%s" % (colnum2name(x1), colnum2name(x2))
        else:
            name1 = cellname(*self.currentxy)
            name2 = cellname(*self.cornerxy)
            name = "%s:%s" % (name1, name2)
        self.beacon['text'] = name

def clearfocus(self):
        if self.currentxy is not None:
            x1, y1 = self.currentxy
            x2, y2 = self.cornerxy or self.currentxy
            if x1 > x2:
                x1, x2 = x2, x1
            if y1 > y2:
                y1, y2 = y2, y1
            for (x, y), cell in self.gridcells.iteritems():
                if x1 <= x <= x2 and y1 <= y <= y2:
                    cell['bg'] = 'white'

def return_event(self, event):
        "Callback for the Return key."
        self.change_cell()
        x, y = self.currentxy
        self.setcurrent(x, y+1)
        return "break"

def shift_return_event(self, event):
        "Callback for the Return key with Shift modifier."
        self.change_cell()
        x, y = self.currentxy
        self.setcurrent(x, max(1, y-1))
        return "break"

def tab_event(self, event):
        "Callback for the Tab key."
        self.change_cell()
        x, y = self.currentxy
        self.setcurrent(x+1, y)
        return "break"

def shift_tab_event(self, event):
        "Callback for the Tab key with Shift modifier."
        self.change_cell()
        x, y = self.currentxy
        self.setcurrent(max(1, x-1), y)
        return "break"

def change_cell(self):
        "Set the current cell from the entry widget."
        x, y = self.currentxy
        text = self.entry.get()
        cell = None
        if text.startswith('='):
            cell = FormulaCell(text[1:])
        else:
            for cls in int, long, float, complex:
                try:
                    value = cls(text)
                except:
                    continue
                else:
                    cell = NumericCell(value)
                    break
        if cell is None and text:
            cell = StringCell(text)
        if cell is None:
            self.sheet.clearcell(x, y)
        else:
            self.sheet.setcell(x, y, cell)
        self.sync()

def sync(self):
        "Fill the GUI cells from the sheet cells."
        self.sheet.recalc()
        for (x, y), gridcell in self.gridcells.iteritems():
            if x == 0 or y == 0:
                continue
            cell = self.sheet.getcell(x, y)
            if cell is None:
                gridcell['text'] = ""
            else:
                if hasattr(cell, 'format'):
                    text, alignment = cell.format()
                else:
                    text, alignment = str(cell), LEFT
                gridcell['text'] = text
                gridcell['anchor'] = align2anchor[alignment]

def test_basic():
    "Basic non-gui self-test."
    import os
    a = Sheet()
    for x in range(1, 11):
        for y in range(1, 11):
            if x == 1:
                cell = NumericCell(y)
            elif y == 1:
                cell = NumericCell(x)
            else:
                c1 = cellname(x, 1)
                c2 = cellname(1, y)
                formula = "%s*%s" % (c1, c2)
                cell = FormulaCell(formula)
            a.setcell(x, y, cell)
##    if os.path.isfile("sheet1.xml"):
##        print "Loading from sheet1.xml"
##        a.load("sheet1.xml")
    a.display()
    a.save("sheet1.xml")

def test_gui():
    "GUI test."
    if sys.argv[1:]:
        filename = sys.argv[1]
    else:
        filename = "sheet1.xml"
    g = SheetGUI(filename)
    g.root.mainloop()

if __name__ == '__main__':
    #test_basic()
    test_gui()

cmd: