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| author | Guido van Rossum <guido@python.org> | 1992-08-10 10:48:14 (GMT) |
|---|---|---|
| committer | Guido van Rossum <guido@python.org> | 1992-08-10 10:48:14 (GMT) |
| commit | 260cc1a85715ff856ff656b9b5f63722af6094d2 (patch) | |
| tree | 8315586241f7856f2b29f3f939d05b83da02e19a /Demo/threads/wpi.py | |
| parent | 814d7cd4921f6202a2b8f45fd5e86b725675ce83 (diff) | |
| download | cpython-260cc1a85715ff856ff656b9b5f63722af6094d2.zip cpython-260cc1a85715ff856ff656b9b5f63722af6094d2.tar.gz cpython-260cc1a85715ff856ff656b9b5f63722af6094d2.tar.bz2 | |
Initial revision
Diffstat (limited to 'Demo/threads/wpi.py')
| -rw-r--r-- | Demo/threads/wpi.py | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Demo/threads/wpi.py b/Demo/threads/wpi.py new file mode 100644 index 0000000..e408d21 --- /dev/null +++ b/Demo/threads/wpi.py @@ -0,0 +1,74 @@ +# Display digits of pi in a window, calculating in a separate thread. +# Compare ../scripts/pi.py. + +import time +import thread +import stdwin +from stdwinevents import * + +digits = [] + +def worker(): + k, a, b, a1, b1 = 2l, 4l, 1l, 12l, 4l + while 1: + # Next approximation + p, q, k = k*k, 2l*k+1l, k+1l + a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1 + # Print common digits + d, d1 = a/b, a1/b1 + #print a, b, a1, b1 + while d == d1: + digits.append(`int(d)`) + a, a1 = 10l*(a%b), 10l*(a1%b1) + d, d1 = a/b, a1/b1 + +def main(): + digits_seen = 0 + thread.start_new_thread(worker, ()) + tw = stdwin.textwidth('0 ') + lh = stdwin.lineheight() + stdwin.setdefwinsize(20 * tw, 20 * lh) + win = stdwin.open('digits of pi') + options = win.menucreate('Options') + options.additem('Auto scroll') + autoscroll = 1 + options.check(0, autoscroll) + while 1: + win.settimer(1) + type, w, detail = stdwin.getevent() + if type == WE_CLOSE: + thread.exit_prog(0) + elif type == WE_DRAW: + (left, top), (right, bottom) = detail + digits_seen = len(digits) + d = win.begindrawing() + for i in range(digits_seen): + h = (i % 20) * tw + v = (i / 20) * lh + if top-lh < v < bottom: + d.text((h, v), digits[i]) + d.close() + elif type == WE_TIMER: + n = len(digits) + if n > digits_seen: + win.settitle(`n` + ' digits of pi') + d = win.begindrawing() + for i in range(digits_seen, n): + h = (i % 20) * tw + v = (i / 20) * lh + d.text((h, v), digits[i]) + d.close() + digits_seen = n + height = (v + 20*lh) / (20*lh) * (20*lh) + win.setdocsize(0, height) + if autoscroll: + win.show((0, v), (h+tw, v+lh)) + elif type == WE_MENU: + menu, item = detail + if menu == options: + if item == 0: + autoscroll = (not autoscroll) + options.check(0, autoscroll) + + +main() |