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Add 'virtual scrolling' support to moused(8). When holding down the middle

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mouse button, motions are interpreted as scrolling.

Submitted by:	Jordan Sissel <psionic-AT-csh.rit.edu>
Approved by:	njl
This commit is contained in:
Philip Paeps 2004-10-11 07:57:08 +00:00
parent 570343bfec
commit 2a669c474a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=136372
2 changed files with 109 additions and 3 deletions
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7
usr.sbin/moused/moused.8
View File

@ -43,6 +43,7 @@
.Op Fl F Ar rate
.Op Fl r Ar resolution
.Op Fl S Ar baudrate
.Op Fl V Op Fl U Ar distance
.Op Fl a Ar X Ns Op , Ns Ar Y
.Op Fl C Ar threshold
.Op Fl m Ar N=M
@ -156,6 +157,12 @@ mode.
.It Fl S Ar baudrate
Select the baudrate for the serial port (1200 to 9600).
Not all serial mice support this option.
.It Fl V
Enable ``Virtual Scrolling'', with this option set, holding the middle mouse
button down will cause motion to be interpreted as scrolling. Use the
.Fl U
option to set the distance the mouse must move before the scrolling mode is
activated.
.It Fl a Ar X Ns Op , Ns Ar Y
Accelerate or decelerate the mouse input.
This is a linear acceleration only.

105
usr.sbin/moused/moused.c
View File

@ -76,6 +76,7 @@ __FBSDID("$FreeBSD$");
#define MAX_BUTTON2TIMEOUT 2000 /* 2 seconds */
#define DFLT_CLICKTHRESHOLD 500 /* 0.5 second */
#define DFLT_BUTTON2TIMEOUT 100 /* 0.1 second */
#define DFLT_SCROLLTHRESHOLD 3 /* 3 pixels */
/* Abort 3-button emulation delay after this many movement events. */
#define BUTTON2_MAXMOVE 3
@ -97,11 +98,12 @@ __FBSDID("$FreeBSD$");
#define ClearDTR 0x0004
#define ClearRTS 0x0008
#define NoPnP 0x0010
#define VirtualScroll 0x0020
#define ID_NONE 0
#define ID_PORT 1
#define ID_IF 2
#define ID_TYPE 4
#define ID_TYPE 4
#define ID_MODEL 8
#define ID_ALL (ID_PORT | ID_IF | ID_TYPE | ID_MODEL)
@ -159,6 +161,13 @@ int identify = ID_NONE;
int extioctl = FALSE;
char *pidfile = "/var/run/moused.pid";
#define SCROLL_NOTSCROLLING 0
#define SCROLL_PREPARE 1
#define SCROLL_SCROLLING 2
static int scroll_state;
static int scroll_movement;
/* local variables */
/* interface (the table must be ordered by MOUSE_IF_XXX in mouse.h) */
@ -380,6 +389,7 @@ static struct rodentparam {
mousemode_t mode; /* protocol information */
float accelx; /* Acceleration in the X axis */
float accely; /* Acceleration in the Y axis */
int scrollthreshold; /* Movement distance before virtual scrolling */
} rodent = {
.flags = 0,
.portname = NULL,
@ -398,6 +408,7 @@ static struct rodentparam {
.button2timeout = DFLT_BUTTON2TIMEOUT,
.accelx = 1.0,
.accely = 1.0,
.scrollthreshold = DFLT_SCROLLTHRESHOLD,
};
/* button status */
@ -509,7 +520,7 @@ main(int argc, char *argv[])
for (i = 0; i < MOUSE_MAXBUTTON; ++i)
mstate[i] = &bstate[i];
while ((c = getopt(argc, argv, "3C:DE:F:I:PRS:a:cdfhi:l:m:p:r:st:w:z:")) != -1)
while ((c = getopt(argc, argv, "3C:DE:F:I:PRS:VU:a:cdfhi:l:m:p:r:st:w:z:")) != -1)
switch(c) {
case '3':
@ -714,6 +725,17 @@ main(int argc, char *argv[])
warnx("no such mouse type `%s'", optarg);
usage();
case 'V':
rodent.flags |= VirtualScroll;
break;
case 'U':
rodent.scrollthreshold = atoi(optarg);
if (rodent.scrollthreshold < 0) {
warnx("invalid argument `%s'", optarg);
usage();
}
break;
case 'h':
case '?':
default:
@ -967,6 +989,50 @@ moused(void)
}
if ((flags = r_protocol(b, &action0)) == 0)
continue;
if (rodent.flags & VirtualScroll) {
/* Allow middle button drags to scroll up and down */
if (action0.button == MOUSE_BUTTON2DOWN) {
if (scroll_state == SCROLL_NOTSCROLLING) {
scroll_state = SCROLL_PREPARE;
debug("PREPARING TO SCROLL");
}
debug("[BUTTON2] flags:%08x buttons:%08x obuttons:%08x",
action.flags, action.button, action.obutton);
} else {
debug("[NOTBUTTON2] flags:%08x buttons:%08x obuttons:%08x",
action.flags, action.button, action.obutton);
/* This isn't a middle button down... move along... */
if (scroll_state == SCROLL_SCROLLING) {
/*
* We were scrolling, someone let go of button 2.
* Now turn autoscroll off.
*/
scroll_state = SCROLL_NOTSCROLLING;
debug("DONE WITH SCROLLING / %d", scroll_state);
} else if (scroll_state == SCROLL_PREPARE) {
mousestatus_t newaction = action0;
/* We were preparing to scroll, but we never moved... */
r_timestamp(&action0);
r_statetrans(&action0, &newaction,
A(newaction.button & MOUSE_BUTTON1DOWN,
action0.button & MOUSE_BUTTON3DOWN));
/* Send middle down */
newaction.button = MOUSE_BUTTON2DOWN;
r_click(&newaction);
/* Send middle up */
r_timestamp(&newaction);
newaction.obutton = newaction.button;
newaction.button = action0.button;
r_click(&newaction);
}
}
}
r_timestamp(&action0);
r_statetrans(&action0, &action,
A(action0.button & MOUSE_BUTTON1DOWN,
@ -984,8 +1050,41 @@ moused(void)
debug("activity : buttons 0x%08x dx %d dy %d dz %d",
action2.button, action2.dx, action2.dy, action2.dz);
if (rodent.flags & VirtualScroll) {
/*
* If *only* the middle button is pressed AND we are moving
* the stick/trackpoint/nipple, scroll!
*/
if (scroll_state == SCROLL_PREPARE) {
/* Ok, Set we're really scrolling now.... */
if (action2.dy || action2.dx)
scroll_state = SCROLL_SCROLLING;
}
if (scroll_state == SCROLL_SCROLLING) {
scroll_movement += action2.dy;
debug("SCROLL: %d", scroll_movement);
if (scroll_movement < -rodent.scrollthreshold) {
/* Scroll down */
action2.dz = -1;
scroll_movement = 0;
}
else if (scroll_movement > rodent.scrollthreshold) {
/* Scroll up */
action2.dz = 1;
scroll_movement = 0;
}
/* Don't move while scrolling */
action2.dx = action2.dy = 0;
}
}
if (extioctl) {
r_click(&action2);
/* Defer clicks until we aren't VirtualScroll'ing. */
if (scroll_state == SCROLL_NOTSCROLLING)
r_click(&action2);
if (action2.flags & MOUSE_POSCHANGED) {
mouse.operation = MOUSE_MOTION_EVENT;
mouse.u.data.buttons = action2.button;