118 lines
2.1 KiB
C
118 lines
2.1 KiB
C
#include <u.h>
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#include <libc.h>
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#include <draw.h>
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#include <event.h>
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/*
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* Convert AccuPoint buttons 4 and 5 to a simulation of button 2.
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* The buttons generate down events, repeat, and have no up events,
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* so it's a struggle. This program turns the left button into a near-as-
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* possible simulation of a regular button 2, but it can only sense up
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* events by timeout, so it's sluggish. Thus it also turns the right button
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* into a click on button 2, useful for acme and chords.
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*/
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typedef struct M M;
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struct M
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{
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Mouse;
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int byte;
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};
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int button2;
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int interrupted;
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int
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readmouse(M *m)
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{
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char buf[1+4*12];
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int n;
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n = read(0, buf, sizeof buf);
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if(n < 0)
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return n;
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if(n != sizeof buf)
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return 0;
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m->byte = buf[0];
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m->xy.x = atoi(buf+1+0*12);
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m->xy.y = atoi(buf+1+1*12);
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m->buttons = atoi(buf+1+2*12);
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m->msec = atoi(buf+1+3*12);
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return 1;
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}
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void
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writemouse(M *m)
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{
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print("%c%11d %11d %11d %11ld ",
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m->byte,
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m->xy.x,
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m->xy.y,
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m->buttons&7,
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m->msec);
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}
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void
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notifyf(void*, char *s)
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{
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if(strcmp(s, "alarm") == 0)
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interrupted = 1;
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noted(NCONT);
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}
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void
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main(void)
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{
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M m, om;
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int n;
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notify(notifyf);
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memset(&m, 0, sizeof m);
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om = m;
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for(;;){
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interrupted = 0;
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/* first click waits 500ms before repeating; after that they're 150, but that's ok */
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if(button2)
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alarm(550);
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n = readmouse(&m);
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if(button2)
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alarm(0);
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if(interrupted){
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/* timed out; clear button 2 */
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om.buttons &= ~2;
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button2 = 0;
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writemouse(&om);
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continue;
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}
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if(n <= 0)
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break;
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/* avoid bounce caused by button 5 click */
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if((om.buttons&16) && (m.buttons&16)){
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om.buttons &= ~16;
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continue;
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}
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if(m.buttons & 2)
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button2 = 0;
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else{
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/* only check 4 and 5 if 2 isn't down of its own accord */
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if(m.buttons & 16){
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/* generate quick button 2 click */
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button2 = 0;
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m.buttons |= 2;
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writemouse(&m);
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m.buttons &= ~2;
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/* fall through to generate up event */
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}else if(m.buttons & 8){
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/* press and hold button 2 */
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button2 = 1;
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}
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}
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if(button2)
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m.buttons |= 2;
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if(m.byte!=om.byte || m.buttons!=om.buttons || !eqpt(m.xy, om.xy))
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writemouse(&m);
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om = m;
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}
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}
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