I thought about an adaptor too, but wasn't sure if such an adaptor would
provide a real serial-port. I am using a specific control line of the
serial-port to detect the signal and in order for this to work the
adaptor would have to convert and provide the signal.
All I really need is an easy way to get a detectable signal in via the
USB port and read it with Java. I thought that USB mice are cheap and
supported by all computers and since they provide up to three buttons
they would be ideal. I guess I have to try such an adaptor.
Thanks
Lars
Dan Streetman wrote:
Yep that is by far the easiest thing to do.
Actually getting mouse events through USB using javax.usb will be much
more work. You'll need to kick the existing HID driver off the mouse
(so you can't use it as a normal system mouse anymore). Then claim it
and start parsing its input reports which are in HID format. The
mouse buttons are part of each report. I'm not completely sure, as I
haven't checked the HID spec, but I believe that mice are not
standardized, as HID devices can generically specify their input
format so the mouse manufacturer can just set up the mouse HID Report
Descriptor to specify how it will report mouse movement and buttons.
So you would either need to write code to specifically parse your
device report format, or actually write a HID parser (you don't want
to do that). If you have only one mouse (or one type of mouse) then
you can just easily figure out what its input report layout is and
code directly to that.
But again as Oscar said - getting a USB to RS232 converter is by far
the easiest thing to do, assuming this is a small scale personal
effort. Converters are super cheap these days; probably less than the
mouse you're connecting.
On Thu, Aug 6, 2009 at 10:08 AM, <m...@san.rr.com
<mailto:m...@san.rr.com>> wrote:
I think your best bet is to get one a usb to serial adapter (for
example: http://sewelldirect.com/usbtoserial.asp)
This will simply show up as a serial port and you won't have to do
anything differently than you do now.
Oscar
---- Lars Schnoor <lars.schn...@ifad.dk
<mailto:lars.schn...@ifad.dk>> wrote:
> Hi everyone
> I have a Java application that needs to detect mouse button
activation.
> I need some hardware input to my application, currently I access the
> serial port to detect some button press by reading the control
lines of
> the serial port using the RXTXcomm package. More and more modern
> computers do however come without serial(COM) port so I need to
switch
> over to USB.
> In a graphical Java user interface I can add a MouseListener and get
> informed when a mouse button is pressed. Basically I need this
> functionality just without the graphical user interface. All I
need is
> button presses, no mouse movement. It would of cause also be
nice if it
> would work under both Windows and Linux. Is there an easy way to
do this?
> Thanks in advance!
>
> Lars
>
>
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