sys/src/9/bitsy/mouse.c

   1 #include "u.h"
   2 #include "../port/lib.h"
   3 #include "mem.h"
   4 #include "dat.h"
   5 #include "fns.h"
   6 #include "../port/error.h"
   7 #include "io.h"
   8
   9 #define Image   IMAGE
  10 #include <draw.h>
  11 #include <memdraw.h>
  12 #include <cursor.h>
  13 #include "screen.h"
  14
  15 enum {
  16         Button1 = 0x1;
  17         Button2 = 0x2;
  18         Button3 = 0x4;
  19 };
  20
  21 int             buttons;
  22 Point   position;
  23
  24 static void
  25 mousevent(void) {
  26         static int              curbuttons;
  27         static Point    curposition;
  28
  29         if (buttons == curbuttons && eqpt(position, curposition))
  30                 return;
  31
  32         /* generate a mouse event */
  33         curbuttons = buttons;
  34         curposition = position;
  35 }
  36
  37 void
  38 buttonevent(int event) {
  39         switch (event) {
  40         case 0x02:
  41                 /* Button 2 down */
  42                 buttons |= Button2;
  43                 mousevent();
  44                 break;
  45         case 0x82:
  46                 /* Button 2 up */
  47                 buttons &= ~Button2;
  48                 mousevent();
  49                 break;
  50         case 0x03:
  51                 /* Button 3 down */
  52                 buttons |= Button3;
  53                 mousevent();
  54                 break;
  55         case 0x83:
  56                 /* Button 3 up */
  57                 buttons &= ~Button3;
  58                 mousevent();
  59                 break;
  60         default:
  61                 /* other buttons */
  62         }
  63 }