Window capture using WM_PRINT and Python

[arN]

Hi !
I'm a Java developper and I wish to make a capture of an offscreen 
window (on WinXP). It's not possible in Java, so I use a python script 
and WM_PRINT, but it doesn't seem to work.

Could someone have a look at my script and give me any advise ?
TIA
--
Arnaud
my python script : python snap.py GraphicalContext_handle image_handle
--
snap.py :
"
import win32api, win32con, sys
win32api.SendMessage(sys.argv[2], win32con.WM_PAINT, sys.argv[3], 0)
win32api.SendMessage(sys.argv[2], win32con.WM_PRINT, sys.argv[3], 
win32con.PRF_CHILDREN | win32con.PRF_CLIENT | win32con.PRF_OWNED)
"


snippet from Snapshot.java :
"
public static Image snapshot(Composite bean) {
GC gc = new GC(bean);
final Image image = new Image (null, bean.getBounds().width, 
bean.getBounds().height);
String commmand = "python snap.py " + gc.handle + " " + image.handle;

Runtime rt = Runtime.getRuntime();
try {
Process p = rt.exec(command);
} catch (.)
gc.dispose();
return image;
}
"
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Re: match nested parenthesis

[arn . zart]

[EMAIL PROTECTED] wrote:
> hi
> i wish to find an reg exp for matching nested parenthesis of varying
> level like
> string =
> "somewords1(words(somewords2)-(some(some)words3)somestuff)somestuff"
> and be able to evaluate the pair starting from the inner most(the
> deepest level) , ie (some)
> up till the outer most. What is a good reg exp to do this? or is simple
> string manipulations enough?
> thanks

Evaluation using re.sub() and recursion (3 lines of code):

def eval_sub(expr):
  r"""Evaluate subexpressions in nested paired delimiters.

  For example,
  ‹ single left-pointing angle quotation‹
  › single right-pointing angle quotation   ›

  >>> eval_sub('‹3 * ‹3 + ‹‹1 + 1› * 2›››')
  '21'
  >>> eval_sub('‹3 *  3 + ‹‹1 + 1› * 2›››') # test
mismatched delimiters
  '13\x9b'
  >>> '\x9b' == '›' # encoding ISO-8859-1
  True
  >>> eval_sub('3 * ‹‹1 + 1› * 2 + 3›') # test absence of
outer delimiters
  '3 * 7'
  """
  val, n = re.subn("‹([^›‹]+)›", lambda m:
str(eval(m.group(1))), expr)
  if n == 0:
return val
  
  return eval_sub(val)
#end

This is just a proof of concept.

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