Thanks!
The first call was successful because it didn't need any params and it
just returned an int.
the second one requires a struct to be passed and that struct needs to
contain a string pointer so the text on the tab can be written to it.
I haven't been able to do this successfully.
The struct to be passed:
class TCITEMAStruct(Structure):
_fields_=[
("mask", c_uint),
('state', wintypes.DWORD),
('stateMask', wintypes.DWORD),
('text', c_char_p),
('textMax', c_int),
('image', c_int),
('lParam', wintypes.LPARAM),
]
If I do the following the host application crashes:
bufLen = 100
tcitemstruct = TCITEMAStruct()
tcitemstruct.mask = TCIF_TEXT
tcitemstruct.textMax = bufLen
buf = create_string_buffer(bufLen)
tcitemstruct.text = cast(buf, c_char_p)
got_it = winUser.sendMessage(obj.windowHandle,
TCM_GETITEMA, tabidx , tcitemstruct)
In scintilla.py I found a way to do it by allocating memory for the
process and it almost works:
bufLen = 100
tcitemstruct = TCITEMAStruct()
tcitemstruct.mask = TCIF_TEXT
tcitemstruct.textMax = bufLen
processHandle = obj.processHandle
internalBuf = winKernel.virtualAllocEx(processHandle,
None, bufLen, winKernel.MEM_COMMIT, winKernel.PAGE_READWRITE)
try:
tcitemstruct.text = internalBuf
internalTCItem =
winKernel.virtualAllocEx(processHandle, None, sizeof(tcitemstruct),
winKernel.MEM_COMMIT, winKernel.PAGE_READWRITE)
try:
winKernel.writeProcessMemory(processHandle,
internalTCItem, byref(tcitemstruct), sizeof(tcitemstruct), None)
got_it = winUser.sendMessage(obj.windowHandle,
TCM_GETITEMW, tabidx , internalTCItem)
finally:
winKernel.virtualFreeEx(processHandle,
internalTCItem, 0, winKernel.MEM_RELEASE)
buf = create_string_buffer(bufLen)
winKernel.readProcessMemory(processHandle,
internalBuf, buf, bufLen, None)
finally:
winKernel.virtualFreeEx(processHandle, internalBuf,
0, winKernel.MEM_RELEASE)
if got_it:
ui.message("Got it!")
ui.message(buf)
The call is successful, i e got_it is true, but the buffer seems to be
empty because NVDA doesn't say anything.
Does anyone have any idea on what's wrong here?
Kind regards
Karl-Otto
Karl-Otto Rosenqvist
MAWINGU
Orgnr: 750804-3937
0701- 75 98 56
karl-otto@xxxxxxxxxx
https://mawingu.se
Den 2022-01-28 kl. 18:00, skrev travis@xxxxxxxxxxxxxx:
In the case of NVDA, import winUser module. (You may also want to review it in** To leave the list, click on the immediately-following link:-
the nvda \source folder.)
I'm not sure which method you need, perhaps getMessage() or sendMessage() will
work.
NVDA has a lot of Windows helper function in winUser.py and something in there
should do what you need.
-Travis
-----Original Message-----
From: program-l-bounce@xxxxxxxxxxxxx <program-l-bounce@xxxxxxxxxxxxx> On Behalf
Of Karl-Otto Rosenqvist
Sent: Friday, January 28, 2022 10:48 AM
To: program-l@xxxxxxxxxxxxx
Subject: [program-l] Use Windows Message to get info från Python
Hi!
I'd like to enhance an add on I've created for NVDA and in order to get info
about the selected tab and the text on that tab I need to send Windows Messages
but I have no idea on how to do this in Python.
It is TCM_GETCURSEL and TCM_GETITEM I should use.
Thanks in advance
Karl-Otto
--
Karl-Otto Rosenqvist
MAWINGU
Orgnr: 750804-3937
0701- 75 98 56
karl-otto@xxxxxxxxxx
https://mawingu.se
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