public/Hanoi_Tower
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Update hanoi_class.py - converting to class for better program flow (no need for global vars, focus changes when button clicks) - WIP version

Browse Source
This commit is contained in:
George 2020-05-03 23:34:48 -07:00
parent cd9e3e4615
commit e5fe256547
1 changed files with 302 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

302
hanoi_class.py Normal file
View File

@ -0,0 +1,302 @@
# -*- coding: utf-8 -*-
"""
Created on Sat Apr 25 21:18:50 2020
@author: cpan
"""
import tkinter as tk
import time
class Hanoi:
def __init__(self, tkroot, num_disks=3, canvas_w=500, canvas_h=400):
self.num_disks = num_disks
self.canvas_w = canvas_w
self.canvas_h = canvas_h
self._gap = 2
self._speed = 0.001 # in seconds
self._step = 2
self._pegs = []
self._pegstate = [[], [], []]
self._tkroot = tkroot
self._frame = tk.Frame(self._tkroot)
self._lbl_disks = tk.Label(self._frame, text="No. of Disks: ")
self._ent_disks = tk.Entry(self._frame, width=5)
self._btn_start = tk.Button(self._frame, text="Start", width=6,
command=self._cmd_start)
self._btn_reset = tk.Button(self._frame, text="Reset", width=6,
command=self._cmd_reset)
self._lbl_speed = tk.Label(self._frame, text="Speed: ")
self._var_speed = tk.StringVar(self._tkroot)
self._opt_speed = tk.OptionMenu(self._frame, self._var_speed,
*{'slow', 'normal', 'fastest'})
self._canvas = tk.Canvas(self._tkroot, width=canvas_w, height=canvas_h)
self._init_tkwindow()
def _init_tkwindow(self):
self._tkroot.title('Hanoi Tower')
self._lbl_disks.pack(side=tk.LEFT)
self._ent_disks.insert(0, str(self.num_disks))
self._ent_disks.bind('<Return>', self._ent_return)
self._ent_disks.bind('<FocusOut>', self._ent_focus)
self._ent_disks.pack(side=tk.LEFT, padx=5)
self._btn_start.pack(side=tk.LEFT, padx=5)
self._btn_reset.pack(side=tk.LEFT, padx=5)
self._lbl_speed.pack(side=tk.LEFT)
self._var_speed.set('normal')
self._opt_speed.config(width=6, takefocus=True)
self._opt_speed.pack(side=tk.LEFT)
self._frame.pack(side=tk.TOP, pady=5)
self._canvas.pack()
self._btn_start.focus_set()
self._var_speed.trace('w', self._var_speed_changed)
self._tkroot.lift()
self._tkroot.focus_force()
def _var_speed_changed(self, *args):
self._opt_speed.focus_set()
speed_opt = {'slow': 0.001, 'normal': 0.001, 'fastest': 0}
step_opt = {'slow': 1, 'normal': 2, 'fastest': 1}
self._speed = speed_opt.get(self._var_speed.get())
self._step = step_opt.get(self._var_speed.get())
print(self._speed)
def _cmd_start(self):
self._btn_reset.focus_set()
self._btn_start.config(state='disabled')
def _cmd_reset(self):
self._btn_start.focus_set()
self._btn_start.config(state='normal')
def _run_hanoi(self):
pass
def _ent_return(self):
pass
def _ent_focus(self):
pass
def _reset_hanoi(self):
pass
# gbl_num_disks = 3
# GAP = 2
# CANVAS_W = 500
# CANVAS_H = 400
# gbl_speed = 0.001 # in seconds
# gbl_step = 2
# gbl_pegs = []
# gbl_pegstate = [[], [], []]
# gbl_disks = []
# gbl_tkroot = tk.Tk()
# gbl_tkroot.title('Hanoi Tower')
# gbl_canvas = None
# gbl_ready = True
# def setup_gui():
# global gbl_canvas
# def ent_return(event):
# event.widget.tk_focusNext().focus()
# def get_ent_focus(event):
# global gbl_num_disks
# try:
# new_num = int(ent_disks.get())
# gbl_num_disks = new_num
# draw_init_setting()
# except Exception as err:
# ent_disks.delete(0, tk.END)
# ent_disks.insert(0, str(gbl_num_disks))
# print(repr(err))
# # print(gbl_num_disks)
# # options row
# tk_row = tk.Frame(gbl_tkroot)
# tk.Label(tk_row, text="No. of Disks: ").pack(side=tk.LEFT)
# ent_disks = tk.Entry(tk_row, width=5)
# ent_disks.insert(0, str(gbl_num_disks))
# ent_disks.bind('<Return>', ent_return)
# ent_disks.bind('<FocusOut>', get_ent_focus)
# ent_disks.pack(side=tk.LEFT, padx=5)
# btn_start = tk.Button(tk_row, text="Start", width=6, command=run_hanoi)
# # btn_start.bind('<ButtonRelease-1>', run_hanoi)
# btn_start.pack(side=tk.LEFT, padx=5)
# btn_reset = tk.Button(tk_row, text="Reset", width=6, command=reset_hanoi)
# # btn_reset.bind('<ButtonRelease-1>', reset_hanoi)
# btn_reset.pack(side=tk.LEFT, padx=5)
# tk.Label(tk_row, text="Speed: ").pack(side=tk.LEFT)
# tk_var = tk.StringVar(gbl_tkroot)
# tk_var.set('normal')
# tk_opt_menu = tk.OptionMenu(tk_row, tk_var,
# *{'slow', 'normal', 'fastest'})
# tk_opt_menu.config(width=6, takefocus=True)
# tk_opt_menu.pack(side=tk.LEFT)
# tk_row.pack(side=tk.TOP, pady=5)
# # animation canvas
# gbl_canvas = tk.Canvas(gbl_tkroot, width=CANVAS_W, height=CANVAS_H)
# gbl_canvas.pack()
# btn_start.focus_set()
# def change_speed(*args):
# global gbl_speed, gbl_step
# speed_opt = {'slow': 0.001, 'normal': 0.001, 'fastest': 0}
# step_opt = {'slow': 1, 'normal': 2, 'fastest': 1}
# gbl_speed = speed_opt.get(tk_var.get())
# gbl_step = step_opt.get(tk_var.get())
# # print(gbl_speed)
# tk_var.trace('w', change_speed)
# def run_hanoi():
# global gbl_ready
# # t0 = time.time()
# if gbl_ready:
# gbl_ready = False
# try:
# hanoi(gbl_num_disks-1, 0, 1, 2)
# except Exception as err:
# print(f'forced reset: {repr(err)}')
# else:
# pass
# # t1 = time.time()
# # print(t1-t0)
# def reset_hanoi():
# draw_init_setting()
# def draw_init_setting():
# global gbl_pegs, gbl_disks, gbl_pegstate, gbl_ready
# gbl_pegs = []
# gbl_pegstate = [[], [], []]
# gbl_disks = []
# gbl_canvas.delete('all')
# # draw the three pegs a, b, c
# peg_w = 10
# peg_h = CANVAS_H // 2
# peg_dist = CANVAS_W // 3
# x1, y1 = (peg_dist - peg_w) // 2, CANVAS_H // 3
# x2, y2 = x1 + peg_w, y1 + peg_h
# for i in range(3):
# gbl_pegs.append(gbl_canvas.create_rectangle(x1, y1, x2, y2, fill = 'black'))
# x1 += peg_dist
# x2 += peg_dist
# gbl_tkroot.update_idletasks()
# gbl_tkroot.update()
# # create disks on the first peg
# disk_h = peg_h // 16
# disk_maxw = peg_dist * 2 // 3
# disk_minw = 2 * peg_w
# x1, y1 = (peg_dist - disk_maxw) // 2, y2 - disk_h - GAP
# x2, y2 = x1 + disk_maxw, y1 + disk_h
# dx = (disk_maxw - disk_minw) // (2 * max(1, gbl_num_disks-1))
# dx = min(dx, 2 * peg_w)
# for i in range(gbl_num_disks):
# gbl_disks.insert(0, gbl_canvas.create_rectangle(x1, y1, x2, y2, fill = 'red'))
# gbl_pegstate[0].append(gbl_num_disks - i - 1)
# x1 += dx
# x2 -= dx
# y1 -= disk_h + GAP
# y2 -= disk_h + GAP
# gbl_tkroot.update_idletasks()
# gbl_tkroot.update()
# gbl_ready = True
def move_disk(i, a, b):
global gbl_pegstate, gbl_canvas
disk_num = gbl_pegstate[a].pop()
if disk_num != i:
raise RuntimeError(f'Trying to move disk piece #{i} from peg {a}\
to peg {b} that does not exist.')
# disk = gbl_disks[i]
# # Lift the disk above peg a
# px1, py1, px2, py2 = gbl_canvas.bbox(gbl_pegs[a])
# while True:
# x1, y1, x2, y2 = gbl_canvas.bbox(disk)
# if y2 < py1:
# break
# gbl_canvas.move(disk, 0, -gbl_step)
# gbl_tkroot.update_idletasks()
# gbl_tkroot.update()
# time.sleep(gbl_speed)
# # Move to peg b
# px1, py1, px2, py2 = gbl_canvas.bbox(gbl_pegs[b])
# new_center = (px1 + px2) // 2
# x1, y1, x2, y2 = gbl_canvas.bbox(disk)
# center = (x1 + x2) // 2
# while center < new_center:
# gbl_canvas.move(disk, gbl_step, 0)
# gbl_tkroot.update_idletasks()
# gbl_tkroot.update()
# time.sleep(0.7*gbl_speed) # faster
# x1, y1, x2, y2 = gbl_canvas.bbox(disk)
# center = (x1 + x2) // 2
# while center > new_center:
# gbl_canvas.move(disk, -gbl_step, 0)
# gbl_tkroot.update_idletasks()
# gbl_tkroot.update()
# time.sleep(0.7*gbl_speed) # faster
# x1, y1, x2, y2 = gbl_canvas.bbox(disk)
# center = (x1 + x2) // 2
# # Drop down
# disk_h = y2 - y1
# new_bottom = py2 - disk_h * len(gbl_pegstate[b]) - GAP
# while True:
# x1, y1, x2, y2 = gbl_canvas.bbox(disk)
# if y2 >= new_bottom:
# break
# gbl_canvas.move(disk, 0, gbl_step)
# gbl_tkroot.update_idletasks()
# gbl_tkroot.update()
# time.sleep(gbl_speed)
# gbl_pegstate[b].append(i)
def hanoi(n :int, a :int, b :int, c :int):
'''
Hanoi algorithm: move n pieces from a to c, using b as buffer.
For each move, call animate() to show the move
'''
if n < 0:
return
hanoi(n-1, a, c, b)
move_disk(n, a, c) # move nth piece from peg a to peg c
hanoi(n-1, b, a, c)
def main():
tkroot = tk.Tk()
hanoi = Hanoi(tkroot)
tkroot.mainloop()
if __name__ == "__main__":
main()