| Title |
Changing mouse sensitivity in Photon |
| Ref. No. |
QNX.000009550 |
| Category(ies) |
Input Devices, Configuration |
| Issue |
How do we change the mouse sensitivity in QNX4 Photon?
|
| Solution |
The first time Photon is run a text file /etc/config/trap/input.$NODE is created. It contains the configuration for the input devices, and you can edit it manually. If you insert the rel -G and -T switches, you can modify the default mouse sensitivity.
A simple example is:
kbd -R fd -d /dev/kbd ps2 -r kb -2 rel -G 1 -T 100
See the online help page of Input for
more details.
Alternatively, if you would like to do this in code, here is a sample which will change the "gain":
#include <sys/pointer.h>
#include <Ph.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/kernel.h>
#include <sys/sendmx.h>
union {
struct {
struct _Ph_msg_forward forward;
} send;
struct {
struct _Ph_msg_hdr_reply hdr;
int result;
} reply;
} msg;
struct {
PhRegionDataHdr_t hdr;
struct _interact_mgr info;
} region_data;
main(int argc, char *argv[])
{
struct _Ph_ctrl *ph;
int gain;
PhConnectId_t conn_id;
struct _pointer_ctrl ctrl;
PhRect_t rect;
PhRegion_t region;
PhRid_t rids[10];
int nreg;
int i;
struct _pointer_ctrl pctrl;
struct _mxfer_entry smx[2], rmx[2];
extern struct _Ph_ctrl *_Ph_;
if (argc > 1)
gain = atoi(argv[1]);
else gain = 2;
if ((ph = PhAttach(NULL, NULL)) == NULL)
perror("PhAttach");
conn_id = PhGetConnectId();
if ((nreg = PhQueryRids(Ph_RIDQUERY_TOWARD, 0, 0, Ph_PTR_REGION,
0, 0, NULL, rids, 10)) <0)
perror("PhQueryRids");
printf("Found %d ptr regions: %dn", nreg, rids[0]);
if (PhRegionQuery(rids[0], ®ion, &rect, ®ion_data,
sizeof(region_data)) <0)
perror("PhRegionQuery");
for(i = 0; i <MAX_DEVS_PER_MGR; i++) {
if (region_data.info.devices[i].type == _INTERACT_TYPE_POINTER) {
printf("Found a INTERACT_TYPE_POINTERn");
break;
}
}
pctrl.type.handle = region_data.info.devices[i].handle;
pctrl.type.type = region_data.info.devices[i].type;
pctrl.type.feedback = region_data.info.devices[i].feedback;
pctrl.gain = gain;
pctrl.threshold = 0;
msg.send.forward.hdr.type = _Ph_SERV_POINTER;
msg.send.forward.hdr.subtype = _POINTERSETCTRL;
msg.send.forward.pid = region.owner;
msg.send.forward.len = IOCPARM_LEN(_POINTERSETCTRL);
_setmx(&smx[0], &msg.send, sizeof(msg.send));
_setmx(&smx[1], &pctrl, sizeof(pctrl));
_setmx(&rmx[0], &msg.reply, sizeof(msg.reply));
_setmx(&rmx[1], &pctrl, sizeof(pctrl));
if (Sendfdmx(ph->fd, 2, 2, smx, rmx) <0)
perror("Sendfdmx");
printf("Message sent successfullyn");
printf("Result code is %dn", msg.reply.result);
}
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