Classes/NJInputHat.m

   1 //
   2 //  NJInputHat.m
   3 //  Enjoy
   4 //
   5 //  Created by Sam McCall on 5/05/09.
   6 //
   7
   8 #import "NJInputHat.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 NJInputHat
  31
  32 - (id)initWithIndex:(int)index {
  33     NSString *name = [NSString stringWithFormat:NSLocalizedString(@"hat switch %d", @"hat switch name"), index];
  34     NSString *did = [NSString stringWithFormat:@"Hat Switch %d", index];
  35     if ((self = [super initWithName:name did:did base:nil])) {
  36         self.children = @[[[NJInput alloc] initWithName:NSLocalizedString(@"hat up", @"hat switch up state")
  37                                                     did:@"Up"
  38                                                    base:self],
  39                           [[NJInput alloc] initWithName:NSLocalizedString(@"hat down", @"hat switch down state")
  40                                                     did:@"Down"
  41                                                    base:self],
  42                           [[NJInput alloc] initWithName:NSLocalizedString(@"hat left", @"hat switch left state")
  43                                                     did:@"Left"
  44                                                    base:self],
  45                           [[NJInput alloc] initWithName:NSLocalizedString(@"hat right", @"hat switch right state")
  46                                                     did:@"Right"
  47                                                    base:self]];
  48     }
  49     return self;
  50 }
  51
  52 - (id)findSubInputForValue:(IOHIDValueRef)value {
  53     long parsed = IOHIDValueGetIntegerValue(value);
  54     switch (IOHIDElementGetLogicalMax(IOHIDValueGetElement(value))) {
  55         case 7: // 8-way switch, 0-7.
  56             switch (parsed) {
  57                 case 0: return self.children[0];
  58                 case 4: return self.children[1];
  59                 case 6: return self.children[2];
  60                 case 2: return self.children[3];
  61                 default: return nil;
  62             }
  63         case 8: // 8-way switch, 1-8 (neutral 0).
  64             switch (parsed) {
  65                 case 1: return self.children[0];
  66                 case 5: return self.children[1];
  67                 case 7: return self.children[2];
  68                 case 3: return self.children[3];
  69                 default: return nil;
  70             }
  71         case 3: // 4-way switch, 0-3.
  72             switch (parsed) {
  73                 case 0: return self.children[0];
  74                 case 2: return self.children[1];
  75                 case 3: return self.children[2];
  76                 case 1: return self.children[3];
  77                 default: return nil;
  78             }
  79         case 4: // 4-way switch, 1-4 (neutral 0).
  80             switch (parsed) {
  81                 case 1: return self.children[0];
  82                 case 3: return self.children[1];
  83                 case 4: return self.children[2];
  84                 case 2: return self.children[3];
  85                 default: return nil;
  86             }
  87         default:
  88             return nil;
  89     }
  90 }
  91
  92 - (void)notifyEvent:(IOHIDValueRef)value {
  93     long parsed = IOHIDValueGetIntegerValue(value);
  94     long size = IOHIDElementGetLogicalMax(IOHIDValueGetElement(value));
  95     // Skip first row in table if 0 is not neutral.
  96     if (size & 1) {
  97         parsed++;
  98         size++;
  99     }
 100     BOOL *activechildren = (size == 8) ? active_eightway : active_fourway;
 101     for (unsigned i = 0; i < 4; i++) {
 102         BOOL active = activechildren[parsed * 4 + i];
 103         [self.children[i] setActive:active];
 104         [self.children[i] setMagnitude:active];
 105     }
 106 }
 107
 108 @end