void HIDGamepad::valueChanged(IOHIDValueRef value)
{
IOHIDElementCookie cookie = IOHIDElementGetCookie(IOHIDValueGetElement(value));
HIDGamepadElement* element = m_elementMap.get(cookie);
// This might be an element we don't currently handle as input so we can skip it.
if (!element)
return;
element->rawValue = IOHIDValueGetScaledValue(value, kIOHIDValueScaleTypePhysical);
if (element->isButton()) {
for (unsigned i = 0; i < m_buttons.size(); ++i) {
if (m_buttons[i].get() == element)
m_buttonValues[i] = element->normalizedValue();
}
} else if (element->isAxis()) {
for (unsigned i = 0; i < m_axes.size(); ++i) {
if (m_axes[i].get() == element)
m_axisValues[i] = element->normalizedValue();
}
} else
ASSERT_NOT_REACHED();
m_lastUpdateTime = monotonicallyIncreasingTime();
}
// *************************************************************************
//
// IOHIDElement_GetValue(inIOHIDElementRef, inIOHIDValueScaleType)
//
// Purpose: returns the current value for an element(polling)
//
// Notes: will return 0 on error conditions which should be accounted for by application
//
// Inputs: inIOHIDElementRef - the element
// inIOHIDValueScaleType - scale type (calibrated or physical)
//
// Returns: double - current value for element
//
double IOHIDElement_GetValue(IOHIDElementRef inIOHIDElementRef, IOHIDValueScaleType inIOHIDValueScaleType) {
double result = NAN;
IOHIDValueRef tIOHIDValueRef;
if (kIOReturnSuccess == IOHIDDeviceGetValue(IOHIDElementGetDevice(inIOHIDElementRef), inIOHIDElementRef, &tIOHIDValueRef)) {
result = IOHIDValueGetScaledValue(tIOHIDValueRef, inIOHIDValueScaleType);
}
return (result);
} // IOHIDElement_GetValue
HIDInputType HIDGamepad::valueChanged(IOHIDValueRef value)
{
IOHIDElementCookie cookie = IOHIDElementGetCookie(IOHIDValueGetElement(value));
HIDGamepadElement* element = m_elementMap.get(cookie);
// This might be an element we don't currently handle as input so we can skip it.
if (!element)
return HIDInputType::NotAButtonPress;
element->rawValue = IOHIDValueGetScaledValue(value, kIOHIDValueScaleTypePhysical);
if (element->isButton()) {
for (unsigned i = 0; i < m_buttons.size(); ++i) {
if (&m_buttons[i].get() == element) {
m_buttonValues[i] = element->normalizedValue();
break;
}
}
} else if (element->isAxis()) {
for (unsigned i = 0; i < m_axes.size(); ++i) {
if (&m_axes[i].get() == element) {
m_axisValues[i] = element->normalizedValue();
break;
}
}
} else if (element->isDPad()) {
int intValue = IOHIDValueGetIntegerValue(value) - element->min;
for (unsigned i = 0; i < m_dPads.size(); ++i) {
if (&m_dPads[i].get() != element)
continue;
// Each DPad represents 4 button values which are tacked on to the end of the values from non-DPad buttons.
unsigned firstButtonValue = m_buttons.size() + i * 4;
ASSERT(m_buttonValues.size() > firstButtonValue + 3);
fillInButtonValues(intValue, m_buttonValues[firstButtonValue], m_buttonValues[firstButtonValue + 1], m_buttonValues[firstButtonValue + 2], m_buttonValues[firstButtonValue + 3]);
}
} else
ASSERT_NOT_REACHED();
m_lastUpdateTime = monotonicallyIncreasingTime();
return element->isButton() ? HIDInputType::ButtonPress : HIDInputType::NotAButtonPress;
}
int joy_hidlib_get_value(joy_hid_device_t *device,
joy_hid_element_t *element,
int *value, int phys)
{
IOHIDValueRef value_ref;
IOReturn result = IOHIDDeviceGetValue( device->internal_device,
element->internal_element,
&value_ref );
if(result == kIOReturnSuccess) {
if(phys) {
*value = (int)IOHIDValueGetScaledValue( value_ref, kIOHIDValueScaleTypePhysical );
} else {
*value = (int)IOHIDValueGetIntegerValue( value_ref );
}
return 0;
} else {
return -1;
}
}
unsigned char HIDConfigureSingleDeviceAction(IOHIDDeviceRef inIOHIDDeviceRef,
IOHIDElementRef * outIOHIDElementRef,
double timeout) {
if (!inIOHIDDeviceRef) {
return (0);
}
if (0 == HIDHaveDeviceList()) { // if we do not have a device list
return (0); // return 0
}
Boolean found = false;
// build list of device and elements to save current values
CFIndex maxElements = HIDCountDeviceElements(inIOHIDDeviceRef,
kHIDElementTypeInput);
double *saveValueArray = (double *) calloc(maxElements,
sizeof(double)); // 2D array to save values
// store initial values on first pass / compare to initial value on subsequent passes
Boolean first = true;
// get all the elements from this device
CFArrayRef elementCFArrayRef = IOHIDDeviceCopyMatchingElements(inIOHIDDeviceRef,
NULL,
kIOHIDOptionsTypeNone);
// if that worked...
if (elementCFArrayRef) {
clock_t start = clock(),
end;
// poll all devices and elements
while (!found) {
uint32_t currElementIndex = 0;
CFIndex idx,
cnt = CFArrayGetCount(elementCFArrayRef);
for (idx = 0; idx < cnt; idx++) {
*outIOHIDElementRef = (IOHIDElementRef) CFArrayGetValueAtIndex(elementCFArrayRef,
idx);
if (!*outIOHIDElementRef) {
continue;
}
// is this an input element?
IOHIDElementType type = IOHIDElementGetType(*outIOHIDElementRef);
switch (type) {
// these types are inputs
case kIOHIDElementTypeInput_Misc:
case kIOHIDElementTypeInput_Button:
case kIOHIDElementTypeInput_Axis:
case kIOHIDElementTypeInput_ScanCodes:
default:
{
break;
}
case kIOHIDElementTypeOutput:
case kIOHIDElementTypeFeature:
case kIOHIDElementTypeCollection:
{
*outIOHIDElementRef = NULL; // these types are not (Skip them)
break;
}
} /* switch */
if (!*outIOHIDElementRef) {
continue; // skip this element
}
// get this elements current value
double value = 0; // default value is zero
IOHIDValueRef tIOHIDValueRef;
IOReturn ioReturn = IOHIDDeviceGetValue(inIOHIDDeviceRef,
*outIOHIDElementRef,
&tIOHIDValueRef);
if (kIOReturnSuccess == ioReturn) {
value = IOHIDValueGetScaledValue(tIOHIDValueRef,
kIOHIDValueScaleTypePhysical);
}
if (first) {
saveValueArray[currElementIndex] = value;
} else {
CFIndex min = IOHIDElementGetLogicalMin(*outIOHIDElementRef);
CFIndex max = IOHIDElementGetLogicalMax(*outIOHIDElementRef);
double initialValue = saveValueArray[currElementIndex];
double delta = (double) (max -
min) *
kPercentMove *
0.01f;
// is the new value within +/- delta of the initial value?
if (((initialValue +
delta) < value) ||
((initialValue -
delta) > value))
{
found = 1; // (yes!) mark as found
break;
}
} // if (first)
currElementIndex++; // bump element index
} // next idx
if (first) {
first = false; // no longer the first pass
} else {
// are we done?
end = clock();
double secs = (double) (end -
start) /
CLOCKS_PER_SEC;
if (secs > timeout) {
break; // (yes) timeout
}
}
} // while (!found)
CFRelease(elementCFArrayRef);
} // if (elementCFArrayRef)
if (saveValueArray) {
free(saveValueArray);
}
// return device and element moved
if (found) {
return (1);
} else {
*outIOHIDElementRef = NULL;
return (0);
}
} // HIDConfigureSingleDeviceAction
// *************************************************************************
//
// HIDConfigureAction(outIOHIDDeviceRef, outIOHIDElementRef, inTimeout)
//
// Purpose: polls all devices and elements for a change greater than kPercentMove.
// Times out after given time returns 1 and pointer to device and element
// if found; returns 0 and NULL for both parameters if not found
//
// Inputs: outIOHIDDeviceRef - address where to store the device
// outIOHIDElementRef - address where to store the element
// inTimeout - the timeout
// Returns: Boolean - if successful
// outIOHIDDeviceRef - the device
// outIOHIDElementRef - the element
//
Boolean HIDConfigureActionOfType(actionTypeMask inActionTypeMask,
double inTimeout,
IOHIDDeviceRef * outIOHIDDeviceRef,
IOHIDElementRef * outIOHIDElementRef) {
// param error?
if (!outIOHIDDeviceRef ||
!outIOHIDElementRef)
{
return (false);
}
if (!gDeviceCFArrayRef) { // if we do not have a device list
// and we can't build another list
if (!HIDBuildDeviceList(0,
0) ||
!gDeviceCFArrayRef)
{
return (false); // bail
}
}
IOHIDDeviceRef tIOHIDDeviceRef;
IOHIDElementRef tIOHIDElementRef;
IOHIDElementType elementType = 0;
switch (inActionTypeMask) {
case kActionTypeButton:
{
elementType = kIOHIDElementTypeInput_Button;
break;
}
case kActionTypeAxis:
{
elementType = kIOHIDElementTypeInput_Misc;
break;
}
case kActionTypeAll:
default:
{
elementType = 0;
break;
}
} // switch
// determine the maximum number of elements
CFIndex maxElements = 0;
CFIndex devIndex,
devCount = CFArrayGetCount(gDeviceCFArrayRef);
for (devIndex = 0; devIndex < devCount; devIndex++) {
tIOHIDDeviceRef = (IOHIDDeviceRef) CFArrayGetValueAtIndex(gDeviceCFArrayRef,
devIndex);
if (!tIOHIDDeviceRef) {
continue; // skip this one
}
// HIDDumpDeviceInfo(tIOHIDDeviceRef);
CFIndex count = HIDCountDeviceElementsOfType(tIOHIDDeviceRef,
elementType);
if (count > maxElements) {
maxElements = count;
}
}
if (!(devCount *
maxElements))
{
return (false);
}
#if true
// NSDictionary * matchDictionary = @{@(kIOHIDElementTypeKey): @(elementType)};
const void *keys[] = {CFSTR(kIOHIDElementTypeKey)};
const void *vals[] = {CFNumberCreate(kCFAllocatorDefault,
kCFNumberIntType,
&elementType)};
CFDictionaryRef matchingDict = CFDictionaryCreate(kCFAllocatorDefault,
keys,
vals,
1,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
CFRelease(vals[0]);
#endif // if 1
// allocate an array of int's in which to store devCount * maxElements values
double *saveValueArray = (double *) calloc(devCount *
maxElements,
sizeof(double)); // clear 2D array to save values
// remember when we start; used to calculate timeout
clock_t start = clock(),
end;
// on first pass store initial values / compare current values to initial values on subsequent passes
Boolean found = false,
first = true;
while (!found) {
double maxDeltaPercent = 0; // we want to find the one that moves the most
// (percentage wise)
for (devIndex = 0; devIndex < devCount; devIndex++) {
tIOHIDDeviceRef = (IOHIDDeviceRef) CFArrayGetValueAtIndex(gDeviceCFArrayRef,
devIndex);
if (!tIOHIDDeviceRef) {
continue; // skip this one
}
gElementCFArrayRef = IOHIDDeviceCopyMatchingElements(tIOHIDDeviceRef,
matchingDict,
kIOHIDOptionsTypeNone);
if (gElementCFArrayRef) {
CFIndex eleIndex,
eleCount = CFArrayGetCount(gElementCFArrayRef);
for (eleIndex = 0; eleIndex < eleCount; eleIndex++) {
tIOHIDElementRef = (IOHIDElementRef) CFArrayGetValueAtIndex(gElementCFArrayRef,
eleIndex);
if (!tIOHIDElementRef) {
continue;
}
IOHIDElementType tIOHIDElementType = IOHIDElementGetType(tIOHIDElementRef);
// only care about inputs (no outputs or features)
if (tIOHIDElementType <= kIOHIDElementTypeInput_ScanCodes) {
if (IOHIDElementIsArray(tIOHIDElementRef)) {
// printf("ARRAY!\n");
continue; // skip array elements
}
if (elementType &&
((tIOHIDElementType != elementType)))
{
continue;
}
uint32_t usagePage = IOHIDElementGetUsagePage(tIOHIDElementRef);
uint32_t usage = IOHIDElementGetUsage(tIOHIDElementRef);
uint32_t reportCount = IOHIDElementGetReportCount(tIOHIDElementRef);
#ifdef DEBUG
if (first) {
HIDDumpElementInfo(tIOHIDElementRef);
fflush(stdout);
uint32_t vendorID = IOHIDDevice_GetVendorID(tIOHIDDeviceRef);
uint32_t productID = IOHIDDevice_GetProductID(tIOHIDDeviceRef);
IOHIDElementCookie cookie = IOHIDElementGetCookie(tIOHIDElementRef);
if ((0x054C == vendorID) &&
(0x0268 == productID) &&
(0x001E == (uint32_t) cookie))
{
// printf("DING!\n");
}
}
#endif // ifdef DEBUG
#if true // work-around for IOHIDValueGetScaledValue crash
// (when element report count > 1)
if (reportCount > 1) {
// printf("REPORT!\n");
continue; // skip reports
}
#endif // if 1
// ignore PID elements and arrays
if ((kHIDPage_PID != usagePage) &&
((-1) != usage))
{
// get this elements current value
double value = 0.0; // default value is zero
IOHIDValueRef tIOHIDValueRef;
IOReturn ioReturn = IOHIDDeviceGetValue(tIOHIDDeviceRef,
tIOHIDElementRef,
&tIOHIDValueRef);
if (kIOReturnSuccess == ioReturn) {
value = IOHIDValueGetScaledValue(tIOHIDValueRef,
kIOHIDValueScaleTypePhysical);
}
if (first) {
saveValueArray[(devIndex *
maxElements) +
eleIndex] = value;
} else {
double initialValue = saveValueArray[(devIndex *
maxElements) +
eleIndex];
CFIndex valueMin = IOHIDElementGetPhysicalMin(tIOHIDElementRef);
CFIndex valueMax = IOHIDElementGetPhysicalMax(tIOHIDElementRef);
double deltaPercent = fabs((initialValue -
value) *
100.0 /
(valueMax -
valueMin));
#if false // debug code useful to dump out value info for
// specific (vendorID, productID, usagePage and
// usage) device
if (!first) {
// Device: 0x13b6a0 = { Logitech Inc. - WingMan Force 3D, vendorID: 0x046D, productID: 0xC283,
// usage: 0x0001:0x0004, "Generic Desktop Joystick"
if ((vendorID == 0x046D) &&
(productID == 0xC283))
{
if ((kHIDPage_GenericDesktop == usagePage) &&
(kHIDUsage_GD_Rz == usage))
{
printf("initial: %6.2f, value: %6.2f, diff: %6.2f, delta percent: %6.2f!\n",
initialValue,
value,
fabs(initialValue -
value),
deltaPercent);
}
}
}
deltaPercent = 0.0;
#endif // if false
if (deltaPercent >= kPercentMove) {
found = true;
if (deltaPercent > maxDeltaPercent) {
maxDeltaPercent = deltaPercent;
*outIOHIDDeviceRef = tIOHIDDeviceRef;
*outIOHIDElementRef = tIOHIDElementRef;
}
break;
}
} // if first
} // if usage
} // if type
} // for elements...
CFRelease(gElementCFArrayRef);
gElementCFArrayRef = NULL;
} // if (gElementCFArrayRef)
if (found) {
// HIDDumpElementInfo(tIOHIDElementRef);
break; // DONE!
}
} // for devices
first = false; // no longer the first pass
// are we done?
end = clock();
double secs = (double) (end -
start) /
CLOCKS_PER_SEC;
if (secs > inTimeout) {
break; // (yes) timeout
}
} // while (!found)
if (saveValueArray) {
free(saveValueArray);
}
// return device and element moved
if (!found) {
*outIOHIDDeviceRef = NULL;
*outIOHIDElementRef = NULL;
}
CFRelease(matchingDict);
return (found);
} // HIDConfigureAction
JoystickState JoystickImpl::update()
{
static const JoystickState disconnectedState; // return this if joystick was disconnected
JoystickState state; // otherwise return that
state.connected = true;
// Note: free up is done in close() which is called, if required,
// by the joystick manager. So we don't release buttons nor axes here.
// First, let's determine if the joystick is still connected
Location selfLoc = m_locationIDs[m_index];
// Get all devices
CFSetRef devices = HIDJoystickManager::getInstance().copyJoysticks();
if (devices == NULL)
return disconnectedState;
// Get a usable copy of the joysticks devices.
CFIndex joysticksCount = CFSetGetCount(devices);
CFTypeRef devicesArray[joysticksCount];
CFSetGetValues(devices, devicesArray);
// Search for it
bool found = false;
for (CFIndex i(0); i < joysticksCount; ++i)
{
IOHIDDeviceRef d = (IOHIDDeviceRef)devicesArray[i];
if (selfLoc == HIDInputManager::getLocationID(d))
{
found = true;
break; // Stop looping
}
}
// Release unused stuff
CFRelease(devices);
// If not found we consider it disconnected
if (!found)
return disconnectedState;
// Update buttons' state
unsigned int i = 0;
for (ButtonsVector::iterator it(m_buttons.begin()); it != m_buttons.end(); ++it, ++i)
{
IOHIDValueRef value = 0;
IOHIDDeviceGetValue(IOHIDElementGetDevice(*it), *it, &value);
// Check for plug out.
if (!value)
{
// No value? Hum... Seems like the joystick is gone
return disconnectedState;
}
// 1 means pressed, others mean released
state.buttons[i] = IOHIDValueGetIntegerValue(value) == 1;
}
// Update axes' state
for (AxisMap::iterator it = m_axis.begin(); it != m_axis.end(); ++it)
{
IOHIDValueRef value = 0;
IOHIDDeviceGetValue(IOHIDElementGetDevice(it->second), it->second, &value);
// Check for plug out.
if (!value)
{
// No value? Hum... Seems like the joystick is gone
return disconnectedState;
}
// We want to bind [physicalMin,physicalMax] to [-100=min,100=max].
//
// General formula to bind [a,b] to [c,d] with a linear progression:
//
// f: [a, b] -> [c, d]
// x |-> (x-a)(d-c)/(b-a)+c
//
// This method might not be very accurate (the "0 position" can be
// slightly shift with some device) but we don't care because most
// of devices are so sensitive that this is not relevant.
double physicalMax = IOHIDElementGetPhysicalMax(it->second);
double physicalMin = IOHIDElementGetPhysicalMin(it->second);
double scaledMin = -100;
double scaledMax = 100;
double physicalValue = IOHIDValueGetScaledValue(value, kIOHIDValueScaleTypePhysical);
float scaledValue = (((physicalValue - physicalMin) * (scaledMax - scaledMin)) / (physicalMax - physicalMin)) + scaledMin;
state.axes[it->first] = scaledValue;
}
return state;
}
Boolean HIDConfigureAction( IOHIDDeviceRef* outIOHIDDeviceRef, IOHIDElementRef *outIOHIDElementRef, float inTimeout )
{
// param error?
if ( !outIOHIDDeviceRef || !outIOHIDElementRef ) {
return 0;
}
if ( !gDeviceCFArrayRef ) { // if we do not have a device list
// and we can't build another list
if ( !HIDBuildDeviceList( 0, 0 ) || !gDeviceCFArrayRef ) {
return FALSE; // bail
}
}
IOHIDDeviceRef tIOHIDDeviceRef;
IOHIDElementRef tIOHIDElementRef;
// remember when we start; used to calculate timeout
clock_t start = clock(), end;
// determine the maximum number of elements
CFIndex maxElements = 0;
CFIndex devIndex, devCount = CFArrayGetCount( gDeviceCFArrayRef );
for ( devIndex = 0; devIndex < devCount; devIndex++ ) {
tIOHIDDeviceRef = ( IOHIDDeviceRef ) CFArrayGetValueAtIndex( gDeviceCFArrayRef, devIndex );
if ( !tIOHIDDeviceRef ) {
continue; // skip this one
}
UInt32 count = HIDCountDeviceElements( tIOHIDDeviceRef, kHIDElementTypeInput );
if ( count > maxElements ) {
maxElements = count;
}
}
// allocate an array of int's in which to store devCount * maxElements values
double* saveValueArray = ( double * ) calloc( devCount * maxElements, sizeof( double ) ); // clear 2D array to save values
// on first pass store initial values / compare current values to initial values on subsequent passes
Boolean found = FALSE, first = TRUE;
while ( !found ) {
double maxDeltaPercent = 0; // we want to find the one that moves the most ( percentage wise )
for ( devIndex = 0; devIndex < devCount; devIndex++ ) {
IOHIDDeviceRef tIOHIDDeviceRef = ( IOHIDDeviceRef ) CFArrayGetValueAtIndex( gDeviceCFArrayRef, devIndex );
if ( !tIOHIDDeviceRef ) {
continue; // skip this one
}
#ifdef DEBUG
long vendorID = IOHIDDevice_GetVendorID( tIOHIDDeviceRef );
long productID = IOHIDDevice_GetProductID( tIOHIDDeviceRef );
#endif
gElementCFArrayRef = IOHIDDeviceCopyMatchingElements( tIOHIDDeviceRef, NULL, kIOHIDOptionsTypeNone );
if ( gElementCFArrayRef ) {
CFIndex eleIndex, eleCount = CFArrayGetCount( gElementCFArrayRef );
for ( eleIndex = 0; eleIndex < eleCount; eleIndex++ ) {
tIOHIDElementRef = ( IOHIDElementRef ) CFArrayGetValueAtIndex( gElementCFArrayRef, eleIndex );
if ( !tIOHIDElementRef ) {
continue;
}
IOHIDElementType tIOHIDElementType = IOHIDElementGetType( tIOHIDElementRef );
// only care about inputs (no outputs or features)
if ( tIOHIDElementType <= kIOHIDElementTypeInput_ScanCodes ) {
if ( IOHIDElementIsArray( tIOHIDElementRef ) ) {
//printf( "ARRAY!\n" );
continue; // skip array elements
}
uint32_t usagePage = IOHIDElementGetUsagePage( tIOHIDElementRef );
uint32_t usage = IOHIDElementGetUsage( tIOHIDElementRef );
uint32_t reportCount = IOHIDElementGetReportCount( tIOHIDElementRef );
#ifdef DEBUG
if ( first ) {
IOHIDElementCookie cookie = IOHIDElementGetCookie( tIOHIDElementRef );
printf( "%s, dev: {ref:%p, ven: 0x%08lX, pro: 0x%08lX}, ele: {ref:%p, cookie: %p, usage:%04lX:%08lX}\n",
__PRETTY_FUNCTION__,
tIOHIDDeviceRef,
vendorID,
productID,
tIOHIDElementRef,
cookie,
(long unsigned int) usagePage,
(long unsigned int) usage ); fflush( stdout );
if ( ( 0x054C == vendorID ) && ( 0x0268 == productID ) && ( 0x001E == (UInt32) cookie ) ) {
//printf( "DING!\n" );
}
}
#endif
#if 1 // work-around for IOHIDValueGetScaledValue crash (when element report count > 1)
if ( reportCount > 1 ) {
//printf( "REPORT!\n" );
continue; // skip reports
}
#endif
// ignore PID elements and arrays
if ( ( kHIDPage_PID != usagePage ) && ( -1 != usage ) ) {
// get this elements current value
double value = 0.0; // default value is zero
IOHIDValueRef tIOHIDValueRef;
IOReturn ioReturn = IOHIDDeviceGetValue( tIOHIDDeviceRef, tIOHIDElementRef, &tIOHIDValueRef );
if ( kIOReturnSuccess == ioReturn ) {
value = IOHIDValueGetScaledValue( tIOHIDValueRef, kIOHIDValueScaleTypePhysical );
}
if ( first ) {
saveValueArray[( devIndex * maxElements ) + eleIndex] = value;
} else {
double initialValue = saveValueArray[( devIndex * maxElements ) + eleIndex];
CFIndex valueMin = IOHIDElementGetPhysicalMin( tIOHIDElementRef );
CFIndex valueMax = IOHIDElementGetPhysicalMax( tIOHIDElementRef );
double deltaPercent = fabs( ( initialValue - value ) * 100.0 / (valueMax - valueMin) );
#if 0
if ( !first ) {
// Device: 0x13b6a0 = { Logitech Inc. - WingMan Force 3D, vendorID: 0x046D, productID: 0xC283, usage: 0x0001:0x0004, "Generic Desktop Joystick"
if ( ( vendorID == 0x046D ) && ( productID == 0xC283 ) ) {
if ( ( kHIDPage_GenericDesktop == usagePage ) && ( kHIDUsage_GD_Rz == usage ) ) {
printf( "initial: %6.2f, value: %6.2f, diff: %6.2f, delta percent: %6.2f!\n", initialValue, value, fabs( initialValue - value ), deltaPercent );
}
}
}
deltaPercent = 0.0;
#endif
if ( deltaPercent >= kPercentMove ) {
found = TRUE;
if ( deltaPercent > maxDeltaPercent ) {
maxDeltaPercent = deltaPercent;
*outIOHIDDeviceRef = tIOHIDDeviceRef;
*outIOHIDElementRef = tIOHIDElementRef;
}
break;
}
} // if first
} // if usage
} // if type
} // for elements...
CFRelease( gElementCFArrayRef );
gElementCFArrayRef = NULL;
} // if ( gElementCFArrayRef )
if ( found ) {
// HIDDumpElementInfo( tIOHIDElementRef );
break; // DONE!
}
} // for devices
first = FALSE; // no longer the first pass
// are we done?
end = clock();
double secs = (double)( end - start ) / CLOCKS_PER_SEC;
if ( secs > inTimeout ) {
break; // ( yes ) timeout
}
} // while ( !found )
// return device and element moved
if ( !found ) {
*outIOHIDDeviceRef = NULL;
*outIOHIDElementRef = NULL;
}
return found;
} // HIDConfigureAction
