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Joystick.m
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Joystick.m
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#import "Joystick.h"
#import <IOKit/hid/IOHIDUsageTables.h>
@implementation Joystick
- (id)init {
if ((self = [super init]) != nil) {
[self setDevice:0];
autoPoll = YES;
buttonA = 1;
buttonB = 2;
}
return self;
}
- (void)dealloc {
[self setCurrentDevice:nil];
[super dealloc];
}
- (BOOL)setDevice:(unsigned int)index {
NSArray* sticks = [DDHidJoystick allJoysticks];
if (index >= 0 && index < [sticks count]) {
[self setCurrentDevice:[sticks objectAtIndex:index]];
stickIndex = index;
} else {
[self setCurrentDevice:nil];
stickIndex = -1;
}
for (int n = 0; n < [stick countOfSticks]; n++) {
DDHidJoystickStick* stickObj = [stick objectInSticksAtIndex:n];
for (int i = 0; i < [stickObj countOfStickElements]; i++) {
DDHidElement* element = [stickObj objectInStickElementsAtIndex: i];
switch ([[element usage] usageId]) {
case kHIDUsage_GD_Z:
//elementZ = [element retain];
break;
case kHIDUsage_GD_Rz:
//elementR = [element retain];
break;
}
}
}
return [self isConnected];
}
- (unsigned int)getDevice {
return stickIndex;
}
- (BOOL)isConnected {
return stick != nil;
}
- (void)setAutoPoll:(BOOL)enabled {
autoPoll = enabled;
}
- (BOOL)getAutoPoll {
return autoPoll;
}
- (void)poll {
if (!autoPoll) {
lastX = [self readX];
lastY = [self readY];
lastButtons = [self readButtons];
}
}
- (unsigned int)getNumButtons {
return [stick numberOfButtons];
}
- (NSString*)getProductName {
return [stick productName];
}
- (BOOL)hasPOV {
@try {
return [[stick objectInSticksAtIndex:0] countOfPovElements];
}
@catch (NSException* e) {
[self setCurrentDevice:nil];
}
return NO;
}
- (int)getX {
if (autoPoll) {
return [self readX];
} else {
return lastX;
}
}
- (int)getY {
if (autoPoll) {
return [self readY];
} else {
return lastY;
}
}
- (int)getZ {
return [self getElementValueWrapper:elementZ];
}
- (int)getR {
return [self getElementValueWrapper:elementR];
}
- (BOOL)getA {
return ([self getButtons] & buttonA) != 0;
}
- (BOOL)getB {
return ([self getButtons] & buttonB) != 0;
}
- (unsigned int)getButtons {
if (autoPoll) {
return [self readButtons];
} else {
return lastButtons;
}
}
- (int)getPOV {
if ([self hasPOV]) {
return [self getElementValueWrapper:[[stick objectInSticksAtIndex:0] objectInPovElementsAtIndex: 0]];
} else {
return -1;
}
}
- (BOOL)getDPad:(Direction)direction {
return NO;
}
- (void)setCurrentDevice:(DDHidJoystick*)device {
[elementZ release];
[elementR release];
@try {
[stick close];
}
@catch (NSException* e) {
// ignore
}
[stick release];
stick = device;
[stick retain];
[stick open];
}
- (int)getElementValueWrapper:(DDHidElement*)element {
if (element) {
@try {
return [stick getElementValue:element];
}
@catch (NSException* e) {
[self setCurrentDevice:nil];
}
}
return 0;
}
- (int)readX {
return [self getElementValueWrapper:[[stick objectInSticksAtIndex:0] xAxisElement]] + 32768;
}
- (int)readY {
return [self getElementValueWrapper:[[stick objectInSticksAtIndex:0] yAxisElement]] + 32768;
}
- (unsigned int)readButtons {
unsigned int buttons = 0;
for (int n = [stick numberOfButtons] - 1; n >= 0; n--) {
buttons |= [self getElementValueWrapper:[[stick buttonElements] objectAtIndex:n]] << n;
}
return buttons;
}
@end