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     CFIndex _max;
  32 }
  33
  34 - (id)initWithElement:(IOHIDElementRef)element
  35                 index:(int)index
  36                parent:(NJInputPathElement *)parent
  37 {
  38     if ((self = [super initWithName:NJINPUT_NAME(NSLocalizedString(@"hat switch %d", @"hat switch name"), index)
  39                                 eid:NJINPUT_DID("Hat Switch", index)
  40                             element:element
  41                                parent:parent])) {
  42         self.children = @[[[NJInput alloc] initWithName:NSLocalizedString(@"hat up", @"hat switch up state")
  43                                                     eid:@"Up"
  44                                                    parent:self],
  45                           [[NJInput alloc] initWithName:NSLocalizedString(@"hat down", @"hat switch down state")
  46                                                     eid:@"Down"
  47                                                    parent:self],
  48                           [[NJInput alloc] initWithName:NSLocalizedString(@"hat left", @"hat switch left state")
  49                                                     eid:@"Left"
  50                                                    parent:self],
  51                           [[NJInput alloc] initWithName:NSLocalizedString(@"hat right", @"hat switch right state")
  52                                                     eid:@"Right"
  53                                                    parent:self]];
  54         _max = IOHIDElementGetLogicalMax(element);
  55     }
  56     return self;
  57 }
  58
  59 - (id)findSubInputForValue:(IOHIDValueRef)value {
  60     long parsed = IOHIDValueGetIntegerValue(value);
  61     switch (_max) {
  62         case 7: // 8-way switch, 0-7.
  63             switch (parsed) {
  64                 case 0: return self.children[0];
  65                 case 4: return self.children[1];
  66                 case 6: return self.children[2];
  67                 case 2: return self.children[3];
  68                 default: return nil;
  69             }
  70         case 8: // 8-way switch, 1-8 (neutral 0).
  71             switch (parsed) {
  72                 case 1: return self.children[0];
  73                 case 5: return self.children[1];
  74                 case 7: return self.children[2];
  75                 case 3: return self.children[3];
  76                 default: return nil;
  77             }
  78         case 3: // 4-way switch, 0-3.
  79             switch (parsed) {
  80                 case 0: return self.children[0];
  81                 case 2: return self.children[1];
  82                 case 3: return self.children[2];
  83                 case 1: return self.children[3];
  84                 default: return nil;
  85             }
  86         case 4: // 4-way switch, 1-4 (neutral 0).
  87             switch (parsed) {
  88                 case 1: return self.children[0];
  89                 case 3: return self.children[1];
  90                 case 4: return self.children[2];
  91                 case 2: return self.children[3];
  92                 default: return nil;
  93             }
  94         default:
  95             return nil;
  96     }
  97 }
  98
  99 - (void)notifyEvent:(IOHIDValueRef)value {
 100     long parsed = IOHIDValueGetIntegerValue(value);
 101     long size = _max;
 102     // Skip first row in table if 0 is not neutral.
 103     if (size & 1) {
 104         parsed++;
 105         size++;
 106     }
 107     BOOL *activechildren = (size == 8) ? active_eightway : active_fourway;
 108     for (unsigned i = 0; i < 4; i++) {
 109         BOOL active = activechildren[parsed * 4 + i];
 110         [self.children[i] setActive:active];
 111         [self.children[i] setMagnitude:active];
 112     }
 113 }
 114
 115 @end