How to receive events (eg. user mouse clicks) from IE
cal_2pac at yahoo.com
cal_2pac at yahoo.com
Fri May 20 11:57:35 EDT 2005
Thanks for the response again. The solution is pretty close but not yet
complete
This is what I observed.
a) I tried to use the delay mechanism as suggested below
ie.
ie.Navigate('www.google.com')
while ie.ReadyState !- 4
time.sleep(0.5)
d=win32com.client.DispatchWithEvents(ie.Document, Doc_Events)
IE *fails* to load the webpage
b) Then I changed the delay to a specified time interval eg
ie.Navigate('www.google.com')
time.sleep(60) #wait for a minute
d=win32com.client.DispatchWithEvents(ie.Document, Doc_Events)
IE loads the web page *after* 60 seconds
c) Then I used raw_input() eg
ie.Navigate('www.google.com')
raw_input()
d=win32com.client.DispatchWithEvents(ie.Document, Doc_Events)
IE now loads the webpage and prompts the user. If I click on the web
page *before* clicking ok on the raw_input prompt - then it correctly
invokes the Doc_Events method Ononactivate method.
>From these observations, it seems that there is some kind of a race
condition / timing issue happening. Can you please comment (or maybe
point me to other sources of info that I can investigate).
I am running Python 2.3 on Windows 2k machine.
Roger Upole wrote:
> Usually you get that error if you try to access the Document object
> before the page has loaded. Try adding a delay after ie.Navigate,
> something like
>
> while ie.ReadyState<>4:
> time.sleep(0.5)
> There are some constants that show up in win32com.client.constants
> that represent the ReadyState's, but I can't remember the names
offhand.
>
> The only real reference for the Html objects (other than reading the
> generated module) is MSDN. Google turned this up:
>
http://msdn.microsoft.com/library/default.asp?url=/workshop/browser/mshtml/reference/events/htmlanchorevents/htmlanchorevents.asp
>
> Roger
>
>
> <cal_2pac at yahoo.com> wrote in message
> news:1116537405.495521.252570 at f14g2000cwb.googlegroups.com...
> > Thanks for your prompt responses and the code.
> > However, when I run the code I get com error
> > d=win32com.client.DispatchWithEvents(ie.Document, Doc_Events)
> > File "C:\Python23\lib\site-packages\win32com\client\__init__.py",
> > line 199, in __getattr__
> > return getattr(self._obj_, attr)
> > File "C:\Python23\lib\site-packages\win32com\client\__init__.py",
> > line 455, in __getattr__
> > return self._ApplyTypes_(*args)
> > File "C:\Python23\lib\site-packages\win32com\client\__init__.py",
> > line 446, in _ApplyTypes_
> > return self._get_good_object_(
> > com_error: (-2147352567, 'Exception occurred.', (0, None, None,
None,
> > 0, -2147467259), None)
> >
> > I am a newbie to python(started coding a few months ago).
> > This appears to be a fairly common error when COM objects are not
> > hooked up properly. Though I have not been able to find a solution
or
> > the reason for this.
> > Thanks again for the explanation.All the information that I had
> > acquired now seems to fall into place. I was not aware about
> > doc_mod.HTMLAnchorEvents. Where can I find more documentation about
> > this?
> >
> > Roger Upole wrote:
> >> Here's a few more lines that hook the document's onactivate event.
> >>
> >> import win32com.client
> >>
> >>
> >
ie_mod=win32com.client.gencache.EnsureModule('{EAB22AC0-30C1-11CF-A7EB-0000C05BAE0B}'
> >
> >> ,0, 1, 1)
> >>
> >
doc_mod=win32com.client.gencache.EnsureModule('{3050F1C5-98B5-11CF-BB82-00AA00BDCE0B}'
> >
> >> ,0 ,4, 0)
> >> class IE_Events(ie_mod.DWebBrowserEvents2):
> >> def OnNavigateComplete2(self, pDisp, URL):
> >> print 'OnNavigateComplete2:', URL
> >>
> >> class Doc_Events(doc_mod.HTMLAnchorEvents):
> >> def Ononactivate(self):
> >> print 'onactivate', self.activeElement.outerHTML
> >>
> >>
> >
ie=win32com.client.DispatchWithEvents('InternetExplorer.Application',IE_Events)
> >> ie.Visible=1
> >> ie.Navigate('http://www.google.com')
> >>
> >> d=win32com.client.DispatchWithEvents(ie.Document, Doc_Events)
> >>
> >> Roger
> >>
> >>
> >> <cal_2pac at yahoo.com> wrote in message
> >> news:1116529345.146032.91880 at f14g2000cwb.googlegroups.com...
> >> > Hi
> >> > Thanks for the response and for the code.
> >> > However, I want to trap events like mouse click on the HTML
> > document
> >> > loaded by the web browser control. The code mentioned below
> > provides
> >> > events from the web browser control. I need to find out on which
> >> > particular HTML tag did the user click for example.
> >> > How do I find that out? There should be some way to refer to a
> > document
> >> > from a given web browser control and start receiving events from
it
> >> >
> >> >
> >> > Roger Upole wrote:
> >> >> The two you'll need to run makepy for are Microsoft Internet
> > Controls
> >> > and
> >> >> Microsoft HTML object Library. If you run them manually, you
> > should
> >> > be
> >> >> able to look at the generated code to get the guids.
> >> >> Here's a minimal example:
> >> >>
> >> >> import win32com.client
> >> >>
> >> >>
> >> >
> >
ie_mod=win32com.client.gencache.EnsureModule('{EAB22AC0-30C1-11CF-A7EB-0000C05BAE0B}',0,
> >> >
> >> >> 1, 1)
> >> >> class IE_Events(ie_mod.DWebBrowserEvents2):
> >> >> def OnNavigateComplete2(self, pDisp, URL):
> >> >> print 'OnNavigateComplete2:', URL
> >> >>
> >> >>
> >> >
> >
ie=win32com.client.DispatchWithEvents('InternetExplorer.Application',IE_Events)
> >> >> ie.Visible=1
> >> >> ie.Navigate('http://www.google.com')
> >> >>
> >> >> hth
> >> >> Roger
> >> >>
> >> >>
> >> >> <cal_2pac at yahoo.com> wrote in message
> >> >> news:1116476411.853695.235670 at g14g2000cwa.googlegroups.com...
> >> >> >I am trying to trap events from internet explorer eg. when
user
> >> > clicks
> >> >> > on an html link - I need to get notified for that event.
> >> >> >
> >> >> > After looking through the newgroups / internet and reading
> > through
> >> >> > various sections in programming python on win32 - I
understand
> > that
> >> >> > this can be done using DispatchWithEvents.
> >> >> > I have also referred to discussions on comp.lang.python
> >> >> >
> >> >
> >
http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/a3c502d06412a5f8/0ee3083e71316da7?q=dispatchwithevents&rnum=43#0ee3083e71316da7
> >> >> >
> >> >> > and
> >> >> >
> >> >> >
> >> >
> >
http://groups-beta.google.com/group/comp.lang.python/browse_thread/thread/1da0668794851296/5bcec1fda216c598?q=dispatchwithevents&rnum=19#5bcec1fda216c598
> >> >> >
> >> >> > So far - none of the newgroups postings report that IE events
> > were
> >> >> > trapped successfully (at least I could not find any).
However,
> >> > there is
> >> >> > enough evidence that it can be done.
> >> >> > My problems at the moment:
> >> >> > a) The examples use early binding. However, I cannot get
Python
> >> > makepy
> >> >> > to generate the code to force makepy process at run time -
since
> >> > COM
> >> >> > makepy utility that I invoke from python win 32 does not have
> > any
> >> > entry
> >> >> > for internet explorer.
> >> >> > I tried to find the CLSID for IE
> >> > 3050F613-98B5-11CF-BB82-00AA00BDCE0B
> >> >> > but I get an exception
> >> >> > b) Also one of the examples suggest that following code
should
> > work
> >> >> >
> >> >> >> mod = EnsureModule(...)
> >> >> >
> >> >> >> class MyEvents(mod.IDocumentEvents):
> >> >> >> # your methods here....
> >> >> >
> >> >> >> handler = MyEvents(ie.document)
> >> >> >
> >> >> >> # handler should start recieving events.
> >> >> >
> >> >> > however, what CLSID is to be used in EnsureModule... . I
tried
> > with
> >> > a
> >> >> > few but I always get the error 'NoneType' object has no
> > attribute
> >> >> > 'IDocumentEvents'
> >> >> >
> >> >> >
> >> >> > An example that 'works' will be very useful
> >> >> >
> >> >>
> >> >>
> >> >>
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