ref: ad26dc48a6dc05da02f96e5f1e7b82de58ff5b2c
dir: /sys/src/cmd/aux/accupoint.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <event.h> /* * Convert AccuPoint buttons 4 and 5 to a simulation of button 2. * The buttons generate down events, repeat, and have no up events, * so it's a struggle. This program turns the left button into a near-as- * possible simulation of a regular button 2, but it can only sense up * events by timeout, so it's sluggish. Thus it also turns the right button * into a click on button 2, useful for acme and chords. */ typedef struct M M; struct M { Mouse; int byte; }; int button2; int interrupted; int readmouse(M *m) { char buf[1+4*12]; int n; n = read(0, buf, sizeof buf); if(n < 0) return n; if(n != sizeof buf) return 0; m->byte = buf[0]; m->xy.x = atoi(buf+1+0*12); m->xy.y = atoi(buf+1+1*12); m->buttons = atoi(buf+1+2*12); m->msec = atoi(buf+1+3*12); return 1; } void writemouse(M *m) { print("%c%11d %11d %11d %11ld ", m->byte, m->xy.x, m->xy.y, m->buttons&7, m->msec); } void notifyf(void*, char *s) { if(strcmp(s, "alarm") == 0) interrupted = 1; noted(NCONT); } void main(void) { M m, om; int n; notify(notifyf); memset(&m, 0, sizeof m); om = m; for(;;){ interrupted = 0; /* first click waits 500ms before repeating; after that they're 150, but that's ok */ if(button2) alarm(550); n = readmouse(&m); if(button2) alarm(0); if(interrupted){ /* timed out; clear button 2 */ om.buttons &= ~2; button2 = 0; writemouse(&om); continue; } if(n <= 0) break; /* avoid bounce caused by button 5 click */ if((om.buttons&16) && (m.buttons&16)){ om.buttons &= ~16; continue; } if(m.buttons & 2) button2 = 0; else{ /* only check 4 and 5 if 2 isn't down of its own accord */ if(m.buttons & 16){ /* generate quick button 2 click */ button2 = 0; m.buttons |= 2; writemouse(&m); m.buttons &= ~2; /* fall through to generate up event */ }else if(m.buttons & 8){ /* press and hold button 2 */ button2 = 1; } } if(button2) m.buttons |= 2; if(m.byte!=om.byte || m.buttons!=om.buttons || !eqpt(m.xy, om.xy)) writemouse(&m); om = m; } }