Re: How to show/hide cursor on attach/deattach usb mouse

If the cursor is not visible, your display driver is not drawing it. We
can't tell you why, because we aren't using the same display driver. You'll
have to read the code and discover why. Maybe it was never designed to draw
cursors, for example. That's certainly a reasonable decision for a custom
display driver written for a device that was never expected to have a mouse
connected.

Paul T.

"venkatyv" <venkatyv@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:4036DC9C-3385-418E-A3D6-034FBE5FEA54@xxxxxxxxxxxxxxxx
I too selected the same mouse component. i have USB mouse working but
cursor
is not visible. Can you please tell me what to be done in the display
driver
to get the mouse cursor.

Thanks,
Venkat

"paolo patierno" wrote:

Hi,
I use windows ce 5 and the catalog item for the mouse is under "Shell and
user Interface" - "User Interface".

Paolo

"Venkat" wrote:

Hi paolo,

I am facing the same problem on my TI OMAP3 platform with Wince6. USB
mouse
is working perfectly but cursor is not visible. I don't find
CursorOn(),
CursorOff() functions in my BSP, can you tell me the functionality to
be
added to see the mouse pointer.

Thanks,
Venkat


"paolo patierno" wrote:

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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