bpo-38539: Update demo files (GH-16890)
This commit is contained in:
Julin S
Raymond Hettinger
parent
20bf8e08a1
commit
a4aeb33669
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@ -1,16 +1,16 @@
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This directory contains a collection of demonstration scripts for
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various aspects of Python programming.
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beer.py Well-known programming example: Bottles of beer.
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eiffel.py Python advanced magic: A metaclass for Eiffel post/preconditions.
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hanoi.py Well-known programming example: Towers of Hanoi.
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life.py Curses programming: Simple game-of-life.
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markov.py Algorithms: Markov chain simulation.
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mcast.py Network programming: Send and receive UDP multicast packets.
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queens.py Well-known programming example: N-Queens problem.
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redemo.py Regular Expressions: GUI script to test regexes.
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rpython.py Network programming: Small client for remote code execution.
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rpythond.py Network programming: Small server for remote code execution.
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sortvisu.py GUI programming: Visualization of different sort algorithms.
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ss1.py GUI/Application programming: A simple spreadsheet application.
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vector.py Python basics: A vector class with demonstrating special methods.
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beer.py Well-known programming example: Bottles of beer.
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eiffel.py Python advanced magic: A metaclass for Eiffel post/preconditions.
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hanoi.py Well-known programming example: Towers of Hanoi.
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life.py Curses programming: Simple game-of-life.
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markov.py Algorithms: Markov chain simulation.
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mcast.py Network programming: Send and receive UDP multicast packets.
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queens.py Well-known programming example: N-Queens problem.
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redemo.py Regular Expressions: GUI script to test regexes.
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rpython.py Network programming: Small client for remote code execution.
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rpythond.py Network programming: Small server for remote code execution.
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sortvisu.py GUI programming: Visualization of different sort algorithms.
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spreadsheet.py GUI/Application programming: A simple spreadsheet application.
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vector.py Python basics: A vector class demonstrating special methods.
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@ -27,7 +27,7 @@ def hanoi(n, a, b, c, report):
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class Tkhanoi:
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# Create our objects
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def __init__(self, n, bitmap = None):
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def __init__(self, n, bitmap=None):
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self.n = n
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self.tk = tk = Tk()
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self.canvas = c = Canvas(tk)
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@ -77,7 +77,7 @@ class Tkhanoi:
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# Run -- never returns
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def run(self):
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while 1:
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while True:
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hanoi(self.n, 0, 1, 2, self.report)
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hanoi(self.n, 1, 2, 0, self.report)
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hanoi(self.n, 2, 0, 1, self.report)
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@ -94,7 +94,7 @@ class Tkhanoi:
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# Lift the piece above peg a
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ax1, ay1, ax2, ay2 = c.bbox(self.pegs[a])
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while 1:
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while True:
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x1, y1, x2, y2 = c.bbox(p)
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if y2 < ay1: break
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c.move(p, 0, -1)
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@ -103,7 +103,7 @@ class Tkhanoi:
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# Move it towards peg b
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bx1, by1, bx2, by2 = c.bbox(self.pegs[b])
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newcenter = (bx1+bx2)//2
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while 1:
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while True:
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x1, y1, x2, y2 = c.bbox(p)
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center = (x1+x2)//2
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if center == newcenter: break
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@ -114,7 +114,7 @@ class Tkhanoi:
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# Move it down on top of the previous piece
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pieceheight = y2-y1
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newbottom = by2 - pieceheight*len(self.pegstate[b]) - 2
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while 1:
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while True:
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x1, y1, x2, y2 = c.bbox(p)
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if y2 >= newbottom: break
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c.move(p, 0, 1)
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@ -29,7 +29,7 @@ def main():
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with conn:
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print('connection from', remotehost, remoteport)
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request = b''
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while 1:
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while True:
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data = conn.recv(BUFSIZE)
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if not data:
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break
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@ -444,7 +444,7 @@ def quicksort(array):
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array.wait(1000)
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left = first
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right = last
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while 1:
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while True:
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array.message("Sweep right pointer")
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right = right-1
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array.show_right(right)
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@ -473,7 +473,7 @@ def quicksort(array):
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array.hide_partition()
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def demosort(array):
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while 1:
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while True:
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for alg in [quicksort, insertionsort, selectionsort, bubblesort]:
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randomize(array)
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alg(array)
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@ -0,0 +1,829 @@
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#!/usr/bin/env python3
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"""
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SS1 -- a spreadsheet-like application.
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"""
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import os
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import re
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import sys
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from xml.parsers import expat
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from xml.sax.saxutils import escape
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LEFT, CENTER, RIGHT = "LEFT", "CENTER", "RIGHT"
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def ljust(x, n):
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return x.ljust(n)
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def center(x, n):
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return x.center(n)
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def rjust(x, n):
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return x.rjust(n)
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align2action = {LEFT: ljust, CENTER: center, RIGHT: rjust}
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align2xml = {LEFT: "left", CENTER: "center", RIGHT: "right"}
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xml2align = {"left": LEFT, "center": CENTER, "right": RIGHT}
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align2anchor = {LEFT: "w", CENTER: "center", RIGHT: "e"}
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def sum(seq):
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total = 0
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for x in seq:
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if x is not None:
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total += x
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return total
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class Sheet:
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def __init__(self):
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self.cells = {} # {(x, y): cell, ...}
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self.ns = dict(
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cell = self.cellvalue,
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cells = self.multicellvalue,
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sum = sum,
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)
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def cellvalue(self, x, y):
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cell = self.getcell(x, y)
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if hasattr(cell, 'recalc'):
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return cell.recalc(self.ns)
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else:
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return cell
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def multicellvalue(self, x1, y1, x2, y2):
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if x1 > x2:
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x1, x2 = x2, x1
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if y1 > y2:
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y1, y2 = y2, y1
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seq = []
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for y in range(y1, y2+1):
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for x in range(x1, x2+1):
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seq.append(self.cellvalue(x, y))
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return seq
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def getcell(self, x, y):
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return self.cells.get((x, y))
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def setcell(self, x, y, cell):
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assert x > 0 and y > 0
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assert isinstance(cell, BaseCell)
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self.cells[x, y] = cell
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def clearcell(self, x, y):
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try:
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del self.cells[x, y]
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except KeyError:
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pass
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def clearcells(self, x1, y1, x2, y2):
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for xy in self.selectcells(x1, y1, x2, y2):
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del self.cells[xy]
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def clearrows(self, y1, y2):
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self.clearcells(0, y1, sys.maxsize, y2)
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def clearcolumns(self, x1, x2):
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self.clearcells(x1, 0, x2, sys.maxsize)
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def selectcells(self, x1, y1, x2, y2):
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if x1 > x2:
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x1, x2 = x2, x1
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if y1 > y2:
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y1, y2 = y2, y1
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return [(x, y) for x, y in self.cells
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if x1 <= x <= x2 and y1 <= y <= y2]
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def movecells(self, x1, y1, x2, y2, dx, dy):
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if dx == 0 and dy == 0:
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return
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if x1 > x2:
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x1, x2 = x2, x1
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if y1 > y2:
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y1, y2 = y2, y1
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assert x1+dx > 0 and y1+dy > 0
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new = {}
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for x, y in self.cells:
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cell = self.cells[x, y]
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if hasattr(cell, 'renumber'):
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cell = cell.renumber(x1, y1, x2, y2, dx, dy)
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if x1 <= x <= x2 and y1 <= y <= y2:
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x += dx
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y += dy
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new[x, y] = cell
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self.cells = new
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def insertrows(self, y, n):
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assert n > 0
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self.movecells(0, y, sys.maxsize, sys.maxsize, 0, n)
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def deleterows(self, y1, y2):
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if y1 > y2:
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y1, y2 = y2, y1
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self.clearrows(y1, y2)
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self.movecells(0, y2+1, sys.maxsize, sys.maxsize, 0, y1-y2-1)
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def insertcolumns(self, x, n):
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assert n > 0
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self.movecells(x, 0, sys.maxsize, sys.maxsize, n, 0)
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def deletecolumns(self, x1, x2):
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if x1 > x2:
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x1, x2 = x2, x1
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self.clearcells(x1, x2)
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self.movecells(x2+1, 0, sys.maxsize, sys.maxsize, x1-x2-1, 0)
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def getsize(self):
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maxx = maxy = 0
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for x, y in self.cells:
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maxx = max(maxx, x)
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maxy = max(maxy, y)
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return maxx, maxy
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def reset(self):
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for cell in self.cells.values():
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if hasattr(cell, 'reset'):
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cell.reset()
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def recalc(self):
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self.reset()
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for cell in self.cells.values():
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if hasattr(cell, 'recalc'):
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cell.recalc(self.ns)
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def display(self):
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maxx, maxy = self.getsize()
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width, height = maxx+1, maxy+1
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colwidth = [1] * width
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full = {}
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# Add column heading labels in row 0
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for x in range(1, width):
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full[x, 0] = text, alignment = colnum2name(x), RIGHT
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colwidth[x] = max(colwidth[x], len(text))
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# Add row labels in column 0
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for y in range(1, height):
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full[0, y] = text, alignment = str(y), RIGHT
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colwidth[0] = max(colwidth[0], len(text))
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# Add sheet cells in columns with x>0 and y>0
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for (x, y), cell in self.cells.items():
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if x <= 0 or y <= 0:
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continue
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if hasattr(cell, 'recalc'):
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cell.recalc(self.ns)
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if hasattr(cell, 'format'):
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text, alignment = cell.format()
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assert isinstance(text, str)
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assert alignment in (LEFT, CENTER, RIGHT)
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else:
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text = str(cell)
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if isinstance(cell, str):
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alignment = LEFT
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else:
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alignment = RIGHT
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full[x, y] = (text, alignment)
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colwidth[x] = max(colwidth[x], len(text))
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# Calculate the horizontal separator line (dashes and dots)
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sep = ""
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for x in range(width):
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if sep:
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sep += "+"
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sep += "-"*colwidth[x]
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# Now print The full grid
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for y in range(height):
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line = ""
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for x in range(width):
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text, alignment = full.get((x, y)) or ("", LEFT)
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text = align2action[alignment](text, colwidth[x])
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if line:
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line += '|'
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line += text
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print(line)
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if y == 0:
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print(sep)
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def xml(self):
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out = ['<spreadsheet>']
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for (x, y), cell in self.cells.items():
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if hasattr(cell, 'xml'):
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cellxml = cell.xml()
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else:
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cellxml = '<value>%s</value>' % escape(cell)
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out.append('<cell row="%s" col="%s">\n %s\n</cell>' %
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(y, x, cellxml))
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out.append('</spreadsheet>')
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return '\n'.join(out)
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def save(self, filename):
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text = self.xml()
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with open(filename, "w", encoding='utf-8') as f:
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f.write(text)
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if text and not text.endswith('\n'):
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f.write('\n')
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def load(self, filename):
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with open(filename, 'rb') as f:
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SheetParser(self).parsefile(f)
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class SheetParser:
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def __init__(self, sheet):
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self.sheet = sheet
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def parsefile(self, f):
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parser = expat.ParserCreate()
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parser.StartElementHandler = self.startelement
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parser.EndElementHandler = self.endelement
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parser.CharacterDataHandler = self.data
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parser.ParseFile(f)
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def startelement(self, tag, attrs):
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method = getattr(self, 'start_'+tag, None)
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if method:
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method(attrs)
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self.texts = []
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def data(self, text):
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self.texts.append(text)
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def endelement(self, tag):
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method = getattr(self, 'end_'+tag, None)
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if method:
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method("".join(self.texts))
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def start_cell(self, attrs):
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self.y = int(attrs.get("row"))
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self.x = int(attrs.get("col"))
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def start_value(self, attrs):
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self.fmt = attrs.get('format')
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self.alignment = xml2align.get(attrs.get('align'))
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start_formula = start_value
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def end_int(self, text):
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try:
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self.value = int(text)
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except (TypeError, ValueError):
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self.value = None
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end_long = end_int
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def end_double(self, text):
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try:
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self.value = float(text)
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except (TypeError, ValueError):
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self.value = None
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def end_complex(self, text):
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try:
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self.value = complex(text)
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except (TypeError, ValueError):
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self.value = None
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def end_string(self, text):
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self.value = text
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def end_value(self, text):
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if isinstance(self.value, BaseCell):
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self.cell = self.value
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elif isinstance(self.value, str):
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self.cell = StringCell(self.value,
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self.fmt or "%s",
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self.alignment or LEFT)
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else:
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self.cell = NumericCell(self.value,
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self.fmt or "%s",
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self.alignment or RIGHT)
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def end_formula(self, text):
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self.cell = FormulaCell(text,
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self.fmt or "%s",
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self.alignment or RIGHT)
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def end_cell(self, text):
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self.sheet.setcell(self.x, self.y, self.cell)
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class BaseCell:
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__init__ = None # Must provide
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"""Abstract base class for sheet cells.
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Subclasses may but needn't provide the following APIs:
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cell.reset() -- prepare for recalculation
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cell.recalc(ns) -> value -- recalculate formula
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cell.format() -> (value, alignment) -- return formatted value
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cell.xml() -> string -- return XML
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"""
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class NumericCell(BaseCell):
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def __init__(self, value, fmt="%s", alignment=RIGHT):
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assert isinstance(value, (int, float, complex))
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assert alignment in (LEFT, CENTER, RIGHT)
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self.value = value
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self.fmt = fmt
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self.alignment = alignment
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def recalc(self, ns):
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return self.value
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def format(self):
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try:
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text = self.fmt % self.value
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except:
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text = str(self.value)
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return text, self.alignment
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def xml(self):
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method = getattr(self, '_xml_' + type(self.value).__name__)
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return '<value align="%s" format="%s">%s</value>' % (
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align2xml[self.alignment],
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self.fmt,
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method())
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def _xml_int(self):
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if -2**31 <= self.value < 2**31:
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return '<int>%s</int>' % self.value
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else:
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return '<long>%s</long>' % self.value
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def _xml_float(self):
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return '<double>%r</double>' % self.value
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def _xml_complex(self):
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return '<complex>%r</complex>' % self.value
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class StringCell(BaseCell):
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def __init__(self, text, fmt="%s", alignment=LEFT):
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assert isinstance(text, str)
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assert alignment in (LEFT, CENTER, RIGHT)
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self.text = text
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self.fmt = fmt
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self.alignment = alignment
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def recalc(self, ns):
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return self.text
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def format(self):
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return self.text, self.alignment
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def xml(self):
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s = '<value align="%s" format="%s"><string>%s</string></value>'
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return s % (
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align2xml[self.alignment],
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self.fmt,
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escape(self.text))
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class FormulaCell(BaseCell):
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|
||||
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, ns):
|
||||
if self.value is None:
|
||||
try:
|
||||
self.value = eval(self.translated, ns)
|
||||
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,
|
||||
escape(self.formula))
|
||||
|
||||
def renumber(self, x1, y1, x2, y2, dx, dy):
|
||||
out = []
|
||||
for part in re.split(r'(\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 configure 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.maxsize, sys.maxsize)
|
||||
|
||||
def selectcolumn(self, event):
|
||||
x, y = self.whichxy(event)
|
||||
self.setcurrent(x, 1)
|
||||
self.setcorner(x, sys.maxsize)
|
||||
|
||||
def extendcolumn(self, event):
|
||||
x, y = self.whichxy(event)
|
||||
if x > 0:
|
||||
self.setcurrent(self.currentxy[0], 1)
|
||||
self.setcorner(x, sys.maxsize)
|
||||
|
||||
def selectrow(self, event):
|
||||
x, y = self.whichxy(event)
|
||||
self.setcurrent(1, y)
|
||||
self.setcorner(sys.maxsize, y)
|
||||
|
||||
def extendrow(self, event):
|
||||
x, y = self.whichxy(event)
|
||||
if y > 0:
|
||||
self.setcurrent(1, self.currentxy[1])
|
||||
self.setcorner(sys.maxsize, 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.items():
|
||||
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.maxsize:
|
||||
name = ":"
|
||||
elif (x1, x2) == (1, sys.maxsize):
|
||||
if y1 == y2:
|
||||
name = "%d" % y1
|
||||
else:
|
||||
name = "%d:%d" % (y1, y2)
|
||||
elif (y1, y2) == (1, sys.maxsize):
|
||||
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.items():
|
||||
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, float, complex:
|
||||
try:
|
||||
value = cls(text)
|
||||
except (TypeError, ValueError):
|
||||
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.items():
|
||||
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."
|
||||
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()
|
||||
Loading…
Reference in New Issue