JSActionHat.m

   1 //
   2 //  JSActionHat.m
   3 //  Enjoy
   4 //
   5 //  Created by Sam McCall on 5/05/09.
   6 //
   7
   8 #import "JSActionHat.h"
   9
  10 static BOOL active_eightway[36] = {
  11     NO,  NO,  NO,  NO , // center
  12     YES, NO,  NO,  NO , // N
  13     YES, NO,  NO,  YES, // NE
  14     NO,  NO,  NO,  YES, // E
  15     NO,  YES, NO,  YES, // SE
  16     NO,  YES, NO,  NO , // S
  17     NO,  YES, YES, NO , // SW
  18     NO,  NO,  YES, NO , // W
  19     YES, NO,  YES, NO , // NW
  20 };
  21
  22 static BOOL active_fourway[20] = {
  23     NO,  NO,  NO,  NO , // center
  24     YES, NO,  NO,  NO , // N
  25     NO,  NO,  NO,  YES, // E
  26     NO,  YES, NO,  NO , // S
  27     NO,  NO,  YES, NO , // W
  28 };
  29
  30 @implementation JSActionHat
  31
  32 - (id)init {
  33     if ((self = [super init])) {
  34         self.children = @[[[JSAction alloc] initWithName:@"Up" base: self],
  35                           [[JSAction alloc] initWithName:@"Down" base: self],
  36                           [[JSAction alloc] initWithName:@"Left" base: self],
  37                           [[JSAction alloc] initWithName:@"Right" base: self]];
  38         // TODO(jfw): Should have an indexed name, like everything else.
  39         self.name = @"Hat switch";
  40     }
  41     return self;
  42 }
  43
  44 - (id)findSubActionForValue:(IOHIDValueRef)value {
  45     int parsed = IOHIDValueGetIntegerValue(value);
  46     switch (IOHIDElementGetLogicalMax(IOHIDValueGetElement(value))) {
  47         case 7: // 8-way switch, 0-7.
  48             switch (parsed) {
  49                 case 0: return self.children[0];
  50                 case 4: return self.children[1];
  51                 case 6: return self.children[2];
  52                 case 2: return self.children[3];
  53                 default: return nil;
  54             }
  55         case 8: // 8-way switch, 1-8 (neutral 0).
  56             switch (parsed) {
  57                 case 1: return self.children[0];
  58                 case 5: return self.children[1];
  59                 case 7: return self.children[2];
  60                 case 3: return self.children[3];
  61                 default: return nil;
  62             }
  63         case 3: // 4-way switch, 0-3.
  64             switch (parsed) {
  65                 case 0: return self.children[0];
  66                 case 2: return self.children[1];
  67                 case 3: return self.children[2];
  68                 case 1: return self.children[3];
  69                 default: return nil;
  70             }
  71         case 4: // 4-way switch, 1-4 (neutral 0).
  72             switch (parsed) {
  73                 case 1: return self.children[0];
  74                 case 3: return self.children[1];
  75                 case 4: return self.children[2];
  76                 case 2: return self.children[3];
  77                 default: return nil;
  78             }
  79         default:
  80             return nil;
  81     }
  82 }
  83
  84 - (void)notifyEvent:(IOHIDValueRef)value {
  85     int parsed = IOHIDValueGetIntegerValue(value);
  86     int size = IOHIDElementGetLogicalMax(IOHIDValueGetElement(value));
  87     // Skip first row in table if 0 is not neutral.
  88     if (size & 1) {
  89         parsed++;
  90         size++;
  91     }
  92     BOOL *activechildren = (size == 8) ? active_eightway : active_fourway;
  93     for (int i = 0; i < 4; i++)
  94         [self.children[i] setActive:activechildren[parsed * 4 + i]];
  95 }
  96
  97 @end