Big rename part 1: 'action' to 'input'.

[enjoyable.git] / NJInputHat.m

diff --git a/NJInputHat.m b/NJInputHat.m
new file mode 100644 (file)
index 0000000..b7d0161
--- /dev/null
+++ b/NJInputHat.m
@@ -0,0 +1,96 @@
+//
+//  NJInputHat.m
+//  Enjoy
+//
+//  Created by Sam McCall on 5/05/09.
+//
+
+#import "NJInputHat.h"
+
+static BOOL active_eightway[36] = {
+    NO,  NO,  NO,  NO , // center
+    YES, NO,  NO,  NO , // N
+    YES, NO,  NO,  YES, // NE
+    NO,  NO,  NO,  YES, // E
+    NO,  YES, NO,  YES, // SE
+    NO,  YES, NO,  NO , // S
+    NO,  YES, YES, NO , // SW
+    NO,  NO,  YES, NO , // W
+    YES, NO,  YES, NO , // NW
+};
+
+static BOOL active_fourway[20] = {
+    NO,  NO,  NO,  NO , // center
+    YES, NO,  NO,  NO , // N
+    NO,  NO,  NO,  YES, // E
+    NO,  YES, NO,  NO , // S
+    NO,  NO,  YES, NO , // W
+};
+
+@implementation NJInputHat
+
+- (id)initWithIndex:(int)index {
+    if ((self = [super init])) {
+        self.children = @[[[NJInput alloc] initWithName:@"Up" base:self],
+                          [[NJInput alloc] initWithName:@"Down" base:self],
+                          [[NJInput alloc] initWithName:@"Left" base:self],
+                          [[NJInput alloc] initWithName:@"Right" base:self]];
+        self.name = [NSString stringWithFormat:@"Hat Switch %d", index];
+    }
+    return self;
+}
+
+- (id)findSubInputForValue:(IOHIDValueRef)value {
+    long parsed = IOHIDValueGetIntegerValue(value);
+    switch (IOHIDElementGetLogicalMax(IOHIDValueGetElement(value))) {
+        case 7: // 8-way switch, 0-7.
+            switch (parsed) {
+                case 0: return self.children[0];
+                case 4: return self.children[1];
+                case 6: return self.children[2];
+                case 2: return self.children[3];
+                default: return nil;
+            }
+        case 8: // 8-way switch, 1-8 (neutral 0).
+            switch (parsed) {
+                case 1: return self.children[0];
+                case 5: return self.children[1];
+                case 7: return self.children[2];
+                case 3: return self.children[3];
+                default: return nil;
+            }
+        case 3: // 4-way switch, 0-3.
+            switch (parsed) {
+                case 0: return self.children[0];
+                case 2: return self.children[1];
+                case 3: return self.children[2];
+                case 1: return self.children[3];
+                default: return nil;
+            }
+        case 4: // 4-way switch, 1-4 (neutral 0).
+            switch (parsed) {
+                case 1: return self.children[0];
+                case 3: return self.children[1];
+                case 4: return self.children[2];
+                case 2: return self.children[3];
+                default: return nil;
+            }
+        default:
+            return nil;
+    }
+}
+
+- (void)notifyEvent:(IOHIDValueRef)value {
+    long parsed = IOHIDValueGetIntegerValue(value);
+    long size = IOHIDElementGetLogicalMax(IOHIDValueGetElement(value));
+    // Skip first row in table if 0 is not neutral.
+    if (size & 1) {
+        parsed++;
+        size++;
+    }
+    BOOL *activechildren = (size == 8) ? active_eightway : active_fourway;
+    for (int i = 0; i < 4; i++)
+        [self.children[i] setActive:activechildren[parsed * 4 + i]];
+}
+
+@end