[pywin32-bugs] [ pywin32-Bugs-1422850 ] pythoncom curious behavior, possible bug

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Bugs item #1422850, was opened at 2006-02-02 19:27
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Category: com
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: rbell01824 (rbell01824)
Assigned to: Nobody/Anonymous (nobody)
Summary: pythoncom curious behavior, possible bug

Initial Comment:
The attached test program was derived from the current
distribution testexplorer.py.  It is modified to catch
most of IE's events and to output a message whenever an
event occurs.  As part of the message output the
elapsed time since the start of the operation that
should be generating events is output by calculating 
time.time()-timeStart.  Based on the output, early in
the applications execution, there is a period of time
when events are occuring and timeStart appears to be 0.
 The code design and debug print statements indicate
that this should not be the case under any
circumstances.  The behavior is odd and may be a bug.

The period of time during which the behavior occurs
depends on when/how pythoncom.PumpWaitingMessages() is
called (see the comments on the WaitLoop statements in
TestExplorerEvents).

Incidentally, the code may provide a useful example of
event processing for the distribution as the existing
code implies message pump behaviors that are not
generally reliable.  You have my permission to use it
in this fashion.

The following clip from a run highlights the behavior:

<<<<< Create IE
##### set timeStart
<<<<< Try setting visible OK
timeStart==0
 5637330 1138908269.281 0 0 OnCommandStateChange    
Command -1 Enable False
timeStart==0
 5637330 1138908269.281 0 0 Visible                  True
********************************************************************************
 ##### Navigate to [about:blank] waitstyle []
##### set timeStart
timeStart==0
 5637330 1138908269.281 0 1 PropertyChange          
'{265b75c1-4158-11d0-90f6-00c04fd497ea}'
timeStart==0
 5637330 1138908269.296 0 1 OnBeforeNavigate2       
URL [about:blank] 
          Flags [0] 
          TargetFrameName []

timeStart should not ever be 0 based on the code and
debug prings.

The test script is attached.


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