Re: How to show/hide cursor on attach/deattach usb mouse
- From: paolo patierno <paolopatierno@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 1 Dec 2008 13:11:00 -0800
Thank you very much,
I have modified the display driver properly and all works...
Thanks
"Paul G. Tobey [eMVP]" wrote:
There's not going to be some simple way to do this. If you're following my.
model and using AdvertiseInterface() and RequestDeviceNotifications(),
you'll have to start a thread during display driver load to handle the
notifications. What you do when one such notification occurs will depend on
*exactly* how the display driver works, which we don't know; it's your
hardware's driver (you have the board support package). Maybe calling
CursorOff() or CursorOn() does the right thing, but the name of the function
is insufficient for us to guess what the function *actually does*. You have
to read, understand, and modify the code appropriately.
Paul T.
"paolo patierno" <paolopatierno@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:85F01198-89FA-4F4C-BC70-AE4D07B8B79E@xxxxxxxxxxxxxxxx
Hi,
I have some problems....
My target platform has iMX31 Freescale processor with a internal IPU...
I have found in file ddipu.h two functions :
CursorOn()
CursorOff()
The display drawing is made by the hw controller.....
Can you have any idea where i put registration notifications for usb mouse
attached and to hide/show cursor....
Help !!
Thanks
"paolo patierno" wrote:
Thank you very much for your help. I hope that i will be usefull...thanks
"Paul G. Tobey [eMVP]" wrote:
It should be obvious that the answer to that depends on the display
driver.
There's no 'enable/disable cursor here' function. Nor is there a right
answer about what you actually need to do. If your driver is using a
hardware cursor implemented in the display hardware, you'd do one
thing. If
it's drawing the cursor itself in software, you'd do something
different.
This is where you earn your money!
Paul T.
"paolo patierno" <paolopatierno@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message
news:F4E9A6CE-12CC-4D46-880B-0063EBD67506@xxxxxxxxxxxxxxxx
Ah....and what is the right code portion to modify in the display
driver
to
receive notifications and to hide cursor ?
Thanks..
"Paul G. Tobey [eMVP]" wrote:
No. ShowCursor() is application-specific. You may decrement the
cursor
count for services.exe well below zero, but that won't cause the
cursor
to
be hidden for all applications.
Paul T.
"paolo patierno" <paolopatierno@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
message
news:21AE7736-11B8-43E5-90DA-FC1314B1B55C@xxxxxxxxxxxxxxxx
My idea wasn't to modify display driver but to create a windows ce
service
that receive notifications and use ShowCursor....it works ??
"Paul G. Tobey [eMVP]" wrote:
Well, since I need it in both mouhid and the display driver, I
put it
in
a
platform-specific header file, devclassmouse.h, in case you're
curious.
I
could not use the IClass registry entry and make it work, because
I
was
starting with the PS/2 mouse, so I'm not 100% sure about that for
the
USB
case.
Paul T.
"paolo patierno" <paolopatierno@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote
in
message
news:C35E55B8-75E2-48C2-B777-32C7604BCD73@xxxxxxxxxxxxxxxx
Can you give me other information.
In which file did you add the #define ?
Can I use the registry key HID mouse and setting its IClass =
GUID
instead
of call AdvertiseInterface in the mouse driver ?
Thanks very much....
"Paul G. Tobey [eMVP]" wrote:
I did this myself by, as you seem to be doing, cloning mouhid
and
arranging
for it to notify the system that a mouse was attached
(AdvertiseInterface).
Here's the class I used for that:
#define DEVCLASS_MOUSE_GUID_STRING
TEXT("{FFBE5A05-87B4-4591-B067-CEBA6FAFD298}")
#define DEVCLASS_MOUSE_GUID { 0xFFBE5A05, 0x87B4, 0x4591,
{ 0xB0,
0x67,
0xCE, 0xBA, 0x6F, 0xAF, 0xD2, 0x98 } }
This particular GUID was suggested as a de facto standard by
Steve
Maillet a
while back, so I used it.
To actually turn the cursor on and off, which is a function of
the
display
driver, I modified my display driver to use
RequestDeviceNotifications:
GUID devguid = DEVCLASS_MOUSE_GUID;
// Ask for device notifications to be sent. Note that we
set the
// last parameter to true to indicate that we want
notifications
// for devices already connected.
notH = RequestDeviceNotifications( &devguid, msgQ, TRUE );
and so on. Of course, it asks for all device events, even
those
for
devices
that were attached before the display driver was executed,
since
you
don't
want to depend on the mouse to be advertised *after* the
display
driver
requested notifications. In the handler for a notification of
the
mouse,
I
do the right thing to turn cursor display in the driver
on/off.
Paul T.
"paolo patierno" <paolopatierno@xxxxxxxxxxxxxxxxxxxxxxxxx>
wrote in
message
news:B7E6AE51-BE98-470E-87AE-CD484DFF6C89@xxxxxxxxxxxxxxxx
hi,
I want to develop a windows ce service who received
notifications
on
usb
mouse attach/deattach and then show/hide the cursor. I read
that
I
must
add a
GUID (IClass) to mouhid.dll (i must clone it) and then use
RequestDeviceNotifications.
Can I have some help !?
Thanks...
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