ref: 4f13cda5bf98bc825ffc7f7ef135f0b919523ad5
parent: 0a1d34375fe8c337100167df74058b0921b8cc03
author: Jacob Moody <jsmoody@iastate.edu>
date: Wed Oct 16 07:27:09 EDT 2019
Added missing event source file
--- /dev/null
+++ b/event.c
@@ -1,0 +1,80 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <mouse.h>
+
+#include "dat.h"
+#include "fncs.h"
+
+Click click[128];
+Click *next;
+int size;
+
+enum{+ MIN,
+ CIN,
+ ROLL,
+};
+
+Click*
+findpoint(Point xy)
+{+ int i;
+ for(i=0;i<size;i++)
+ if(ptinrect(xy, click[i].r))
+ return click+i;
+ return nil;
+}
+
+void
+eventthread(void *arg)
+{+ Mouse m;
+ Click c;
+ Channel **chans = arg;
+ Channel *min = chans[0];
+ Channel *cin = chans[1];
+ Channel *out = chans[2];
+ Channel *roll = chans[3];
+ free(chans);
+
+ Alt alts[] = {+ {min, &m, CHANRCV},+ {cin, &c, CHANRCV},+ {roll, nil, CHANRCV},+ {nil, nil, CHANEND},+ };
+ for(;;)
+ switch(alt(alts)){+ case CIN:
+ size++;
+ assert(size < 128);
+ click[size] = c;
+ break;
+ case MIN:
+ if(m.buttons != 1)
+ continue;
+ next = findpoint(m.xy);
+ if(next != nil)
+ send(out, next);
+ break;
+ case ROLL:
+ size = 0;
+ break;
+ }
+}
+
+void
+spawnevent(Channel *min, Channel *cin, Channel *out, Channel *rollback)
+{+ Channel **chans;
+ size = 0;
+ chans = emalloc(sizeof(Channel*)*4);
+ chans[0] = min;
+ chans[1] = cin;
+ chans[2] = out;
+ chans[3] = rollback;
+ threadcreate(eventthread, chans, 8192);
+}
+