diff options
Diffstat (limited to 'Demo/tkinter/guido/hanoi.py')
| -rwxr-xr-x | Demo/tkinter/guido/hanoi.py | 238 |
1 files changed, 119 insertions, 119 deletions
diff --git a/Demo/tkinter/guido/hanoi.py b/Demo/tkinter/guido/hanoi.py index 9e566c4..078c246 100755 --- a/Demo/tkinter/guido/hanoi.py +++ b/Demo/tkinter/guido/hanoi.py @@ -16,139 +16,139 @@ from Tkinter import * # Basic Towers-of-Hanoi algorithm: move n pieces from a to b, using c # as temporary. For each move, call report() def hanoi(n, a, b, c, report): - if n <= 0: return - hanoi(n-1, a, c, b, report) - report(n, a, b) - hanoi(n-1, c, b, a, report) + if n <= 0: return + hanoi(n-1, a, c, b, report) + report(n, a, b) + hanoi(n-1, c, b, a, report) # The graphical interface class Tkhanoi: - # Create our objects - def __init__(self, n, bitmap = None): - self.n = n - self.tk = tk = Tk() - self.canvas = c = Canvas(tk) - c.pack() - width, height = tk.getint(c['width']), tk.getint(c['height']) - - # Add background bitmap - if bitmap: - self.bitmap = c.create_bitmap(width/2, height/2, - bitmap=bitmap, - foreground='blue') - - # Generate pegs - pegwidth = 10 - pegheight = height/2 - pegdist = width/3 - x1, y1 = (pegdist-pegwidth)/2, height*1/3 - x2, y2 = x1+pegwidth, y1+pegheight - self.pegs = [] - p = c.create_rectangle(x1, y1, x2, y2, fill='black') - self.pegs.append(p) - x1, x2 = x1+pegdist, x2+pegdist - p = c.create_rectangle(x1, y1, x2, y2, fill='black') - self.pegs.append(p) - x1, x2 = x1+pegdist, x2+pegdist - p = c.create_rectangle(x1, y1, x2, y2, fill='black') - self.pegs.append(p) - self.tk.update() - - # Generate pieces - pieceheight = pegheight/16 - maxpiecewidth = pegdist*2/3 - minpiecewidth = 2*pegwidth - self.pegstate = [[], [], []] - self.pieces = {} - x1, y1 = (pegdist-maxpiecewidth)/2, y2-pieceheight-2 - x2, y2 = x1+maxpiecewidth, y1+pieceheight - dx = (maxpiecewidth-minpiecewidth) / (2*max(1, n-1)) - for i in range(n, 0, -1): - p = c.create_rectangle(x1, y1, x2, y2, fill='red') - self.pieces[i] = p - self.pegstate[0].append(i) - x1, x2 = x1 + dx, x2-dx - y1, y2 = y1 - pieceheight-2, y2-pieceheight-2 - self.tk.update() - self.tk.after(25) - - # Run -- never returns - def run(self): - while 1: - hanoi(self.n, 0, 1, 2, self.report) - hanoi(self.n, 1, 2, 0, self.report) - hanoi(self.n, 2, 0, 1, self.report) - hanoi(self.n, 0, 2, 1, self.report) - hanoi(self.n, 2, 1, 0, self.report) - hanoi(self.n, 1, 0, 2, self.report) - - # Reporting callback for the actual hanoi function - def report(self, i, a, b): - if self.pegstate[a][-1] != i: raise RuntimeError # Assertion - del self.pegstate[a][-1] - p = self.pieces[i] - c = self.canvas - - # Lift the piece above peg a - ax1, ay1, ax2, ay2 = c.bbox(self.pegs[a]) - while 1: - x1, y1, x2, y2 = c.bbox(p) - if y2 < ay1: break - c.move(p, 0, -1) - self.tk.update() - - # Move it towards peg b - bx1, by1, bx2, by2 = c.bbox(self.pegs[b]) - newcenter = (bx1+bx2)/2 - while 1: - x1, y1, x2, y2 = c.bbox(p) - center = (x1+x2)/2 - if center == newcenter: break - if center > newcenter: c.move(p, -1, 0) - else: c.move(p, 1, 0) - self.tk.update() - - # Move it down on top of the previous piece - pieceheight = y2-y1 - newbottom = by2 - pieceheight*len(self.pegstate[b]) - 2 - while 1: - x1, y1, x2, y2 = c.bbox(p) - if y2 >= newbottom: break - c.move(p, 0, 1) - self.tk.update() - - # Update peg state - self.pegstate[b].append(i) + # Create our objects + def __init__(self, n, bitmap = None): + self.n = n + self.tk = tk = Tk() + self.canvas = c = Canvas(tk) + c.pack() + width, height = tk.getint(c['width']), tk.getint(c['height']) + + # Add background bitmap + if bitmap: + self.bitmap = c.create_bitmap(width/2, height/2, + bitmap=bitmap, + foreground='blue') + + # Generate pegs + pegwidth = 10 + pegheight = height/2 + pegdist = width/3 + x1, y1 = (pegdist-pegwidth)/2, height*1/3 + x2, y2 = x1+pegwidth, y1+pegheight + self.pegs = [] + p = c.create_rectangle(x1, y1, x2, y2, fill='black') + self.pegs.append(p) + x1, x2 = x1+pegdist, x2+pegdist + p = c.create_rectangle(x1, y1, x2, y2, fill='black') + self.pegs.append(p) + x1, x2 = x1+pegdist, x2+pegdist + p = c.create_rectangle(x1, y1, x2, y2, fill='black') + self.pegs.append(p) + self.tk.update() + + # Generate pieces + pieceheight = pegheight/16 + maxpiecewidth = pegdist*2/3 + minpiecewidth = 2*pegwidth + self.pegstate = [[], [], []] + self.pieces = {} + x1, y1 = (pegdist-maxpiecewidth)/2, y2-pieceheight-2 + x2, y2 = x1+maxpiecewidth, y1+pieceheight + dx = (maxpiecewidth-minpiecewidth) / (2*max(1, n-1)) + for i in range(n, 0, -1): + p = c.create_rectangle(x1, y1, x2, y2, fill='red') + self.pieces[i] = p + self.pegstate[0].append(i) + x1, x2 = x1 + dx, x2-dx + y1, y2 = y1 - pieceheight-2, y2-pieceheight-2 + self.tk.update() + self.tk.after(25) + + # Run -- never returns + def run(self): + while 1: + hanoi(self.n, 0, 1, 2, self.report) + hanoi(self.n, 1, 2, 0, self.report) + hanoi(self.n, 2, 0, 1, self.report) + hanoi(self.n, 0, 2, 1, self.report) + hanoi(self.n, 2, 1, 0, self.report) + hanoi(self.n, 1, 0, 2, self.report) + + # Reporting callback for the actual hanoi function + def report(self, i, a, b): + if self.pegstate[a][-1] != i: raise RuntimeError # Assertion + del self.pegstate[a][-1] + p = self.pieces[i] + c = self.canvas + + # Lift the piece above peg a + ax1, ay1, ax2, ay2 = c.bbox(self.pegs[a]) + while 1: + x1, y1, x2, y2 = c.bbox(p) + if y2 < ay1: break + c.move(p, 0, -1) + self.tk.update() + + # Move it towards peg b + bx1, by1, bx2, by2 = c.bbox(self.pegs[b]) + newcenter = (bx1+bx2)/2 + while 1: + x1, y1, x2, y2 = c.bbox(p) + center = (x1+x2)/2 + if center == newcenter: break + if center > newcenter: c.move(p, -1, 0) + else: c.move(p, 1, 0) + self.tk.update() + + # Move it down on top of the previous piece + pieceheight = y2-y1 + newbottom = by2 - pieceheight*len(self.pegstate[b]) - 2 + while 1: + x1, y1, x2, y2 = c.bbox(p) + if y2 >= newbottom: break + c.move(p, 0, 1) + self.tk.update() + + # Update peg state + self.pegstate[b].append(i) # Main program def main(): - import sys, string + import sys, string - # First argument is number of pegs, default 4 - if sys.argv[1:]: - n = string.atoi(sys.argv[1]) - else: - n = 4 + # First argument is number of pegs, default 4 + if sys.argv[1:]: + n = string.atoi(sys.argv[1]) + else: + n = 4 - # Second argument is bitmap file, default none - if sys.argv[2:]: - bitmap = sys.argv[2] - # Reverse meaning of leading '@' compared to Tk - if bitmap[0] == '@': bitmap = bitmap[1:] - else: bitmap = '@' + bitmap - else: - bitmap = None + # Second argument is bitmap file, default none + if sys.argv[2:]: + bitmap = sys.argv[2] + # Reverse meaning of leading '@' compared to Tk + if bitmap[0] == '@': bitmap = bitmap[1:] + else: bitmap = '@' + bitmap + else: + bitmap = None - # Create the graphical objects... - h = Tkhanoi(n, bitmap) + # Create the graphical objects... + h = Tkhanoi(n, bitmap) - # ...and run! - h.run() + # ...and run! + h.run() # Call main when run as script if __name__ == '__main__': - main() + main() |