502 lines
20 KiB
C
502 lines
20 KiB
C
// File: IOHIDElement_.c
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// Abstract: convieance functions for IOHIDElementGetProperty
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// Version: 2.0
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//
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// Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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// Inc. ("Apple") in consideration of your agreement to the following
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// terms, and your use, installation, modification or redistribution of
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// this Apple software constitutes acceptance of these terms. If you do
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// not agree with these terms, please do not use, install, modify or
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// redistribute this Apple software.
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//
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// In consideration of your agreement to abide by the following terms, and
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// subject to these terms, Apple grants you a personal, non-exclusive
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// license, under Apple's copyrights in this original Apple software (the
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// "Apple Software"), to use, reproduce, modify and redistribute the Apple
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// Software, with or without modifications, in source and/or binary forms;
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// provided that if you redistribute the Apple Software in its entirety and
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// without modifications, you must retain this notice and the following
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// text and disclaimers in all such redistributions of the Apple Software.
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// Neither the name, trademarks, service marks or logos of Apple Inc. may
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// be used to endorse or promote products derived from the Apple Software
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// without specific prior written permission from Apple. Except as
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// expressly stated in this notice, no other rights or licenses, express or
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// implied, are granted by Apple herein, including but not limited to any
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// patent rights that may be infringed by your derivative works or by other
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// works in which the Apple Software may be incorporated.
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//
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// The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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// MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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// THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
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// OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
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//
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// IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
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// OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
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// MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
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// AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
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// STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Copyright (C) 2009 Apple Inc. All Rights Reserved.
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//
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//*****************************************************
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#pragma mark - includes & imports
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//-----------------------------------------------------
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#include "IOHIDElement_.h"
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//*****************************************************
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#pragma mark - typedef's, struct's, enums, defines, etc.
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//-----------------------------------------------------
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//*****************************************************
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#pragma mark - local (static) function prototypes
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//-----------------------------------------------------
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// static Boolean IOHIDElement_GetLongProperty( IOHIDElementRef inElementRef, CFStringRef inKey, long * outValue );
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// static void IOHIDElement_SetLongProperty( IOHIDElementRef inElementRef, CFStringRef inKey, long inValue );
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//*****************************************************
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#pragma mark - exported globals
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//-----------------------------------------------------
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//*****************************************************
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#pragma mark - local (static) globals
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//-----------------------------------------------------
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//*****************************************************
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#pragma mark - exported function implementations
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//-----------------------------------------------------
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//*************************************************************************
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//
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// HIDIsValidElement( inIOHIDElementRef )
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//
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// Purpose: validate this element
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//
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// Inputs: inIOHIDElementRef - the element
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//
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// Returns: Boolean - TRUE if this is a valid element ref
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//
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Boolean HIDIsValidElement(IOHIDElementRef inIOHIDElementRef) {
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Boolean result = FALSE; // assume failure (pessimist!)
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if ( inIOHIDElementRef ) {
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if ( CFGetTypeID(inIOHIDElementRef) ==IOHIDElementGetTypeID() ) {
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result = TRUE;
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}
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}
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return (result);
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} // HIDIsValidElement
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//*************************************************************************
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//
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// IOHIDElement_GetValue( inElementRef, inIOHIDValueScaleType )
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//
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// Purpose: returns the current value for an element( polling )
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//
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// Notes: will return 0 on error conditions which should be accounted for by application
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//
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// Inputs: inElementRef - the element
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// inIOHIDValueScaleType - scale type ( calibrated or physical )
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//
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// Returns: double - current value for element
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//
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double IOHIDElement_GetValue(IOHIDElementRef inElementRef, IOHIDValueScaleType inIOHIDValueScaleType) {
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long result = 0;
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IOHIDValueRef tIOHIDValueRef;
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if ( kIOReturnSuccess == IOHIDDeviceGetValue(IOHIDElementGetDevice(inElementRef), inElementRef, &tIOHIDValueRef) ) {
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result = IOHIDValueGetScaledValue(tIOHIDValueRef, inIOHIDValueScaleType);
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}
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return (result);
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} // IOHIDElement_GetValue
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//*************************************************************************
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//
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// IOHIDElement_GetCalibrationMin( inElementRef )
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//
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// Purpose: get the minimum bounds for a calibrated value for this element
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: CFIndex - the minimum Calibration value for this element
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//
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CFIndex IOHIDElement_GetCalibrationMin(IOHIDElementRef inElementRef) {
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CFIndex result;
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationMinKey), &result) ) {
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementMaxKey), &result) ) {
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result = 0x7FFFFFFF;
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}
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationMinKey), result);
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}
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return (result);
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} // IOHIDElement_GetCalibrationMin
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//*************************************************************************
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//
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// IOHIDElement_SetCalibrationMin( inElementRef, inValue )
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//
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// Purpose: set the minimum bounds for a calibrated value for this element
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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// inValue - the minimum bounds for a calibrated value for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetCalibrationMin(IOHIDElementRef inElementRef, CFIndex inValue) {
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationMinKey), inValue);
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} // IOHIDElement_SetCalibrationMin
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//*************************************************************************
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//
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// IOHIDElement_GetCalibrationMax( inElementRef )
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//
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// Purpose: get the maximum bounds for a calibrated value for this element
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: CFIndex - the maximum Calibration value for this element
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//
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CFIndex IOHIDElement_GetCalibrationMax(IOHIDElementRef inElementRef) {
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CFIndex result;
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationMaxKey), &result) ) {
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementMinKey), &result) ) {
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result = -0x7FFFFFFF;
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}
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationMaxKey), result);
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}
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return (result);
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} // IOHIDElement_GetCalibrationMax
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//*************************************************************************
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//
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// IOHIDElement_SetCalibrationMax( inElementRef, inValue )
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//
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// Purpose: set the maximum bounds for a calibrated value for this element
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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// inValue - the maximum Calibration value for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetCalibrationMax(IOHIDElementRef inElementRef, CFIndex inValue) {
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationMaxKey), inValue);
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} // IOHIDElement_SetCalibrationMax
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//*************************************************************************
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//
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// IOHIDElement_GetCalibrationSaturationMin( inElementRef )
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//
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// Purpose: get the mininum tolerance to be used when calibrating a logical element value
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: CFIndex - the maximum Calibration value for this element
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//
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CFIndex IOHIDElement_GetCalibrationSaturationMin(IOHIDElementRef inElementRef) {
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CFIndex result;
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationSaturationMinKey), &result) ) {
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementMinKey), &result) ) {
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result = -0x7FFFFFFF;
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}
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationSaturationMinKey), result);
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}
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return (result);
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} // IOHIDElement_GetCalibrationSaturationMin
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//*************************************************************************
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//
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// IOHIDElement_SetCalibrationSaturationMin( inElementRef, inValue )
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//
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// Purpose: set the mininum tolerance to be used when calibrating a logical element value
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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// inValue - the maximum Calibration value for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetCalibrationSaturationMin(IOHIDElementRef inElementRef, CFIndex inValue) {
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationSaturationMinKey), inValue);
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} // IOHIDElement_SetCalibrationSaturationMin
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//*************************************************************************
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//
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// IOHIDElement_GetCalibrationSaturationMax( inElementRef )
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//
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// Purpose: get the maximum tolerance to be used when calibrating a logical element value
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: CFIndex - the maximum Calibration value for this element
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//
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CFIndex IOHIDElement_GetCalibrationSaturationMax(IOHIDElementRef inElementRef) {
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CFIndex result;
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationSaturationMaxKey), &result) ) {
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementMinKey), &result) ) {
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result = -0x7FFFFFFF;
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}
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationSaturationMaxKey), result);
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}
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return (result);
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} // IOHIDElement_GetCalibrationSaturationMax
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//*************************************************************************
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//
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// IOHIDElement_SetCalibrationSaturationMax( inElementRef, inValue )
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//
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// Purpose: set the maximum tolerance to be used when calibrating a logical element value
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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// inValue - the maximum Calibration value for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetCalibrationSaturationMax(IOHIDElementRef inElementRef, CFIndex inValue) {
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationSaturationMaxKey), inValue);
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} // IOHIDElement_SetCalibrationSaturationMax
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//*************************************************************************
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//
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// IOHIDElement_GetCalibrationDeadZoneMin( inElementRef )
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//
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// Purpose: get the minimum bounds near the midpoint of a logical value in which the value is ignored
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: CFIndex - the maximum Calibration value for this element
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//
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CFIndex IOHIDElement_GetCalibrationDeadZoneMin(IOHIDElementRef inElementRef) {
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CFIndex result;
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationDeadZoneMinKey), &result) ) {
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementMinKey), &result) ) {
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result = -0x7FFFFFFF;
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}
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationDeadZoneMinKey), result);
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}
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return (result);
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} // IOHIDElement_GetCalibrationDeadZoneMin
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//*************************************************************************
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//
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// IOHIDElement_SetCalibrationDeadZoneMin( inElementRef, inValue )
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//
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// Purpose: set the minimum bounds near the midpoint of a logical value in which the value is ignored
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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// inValue - the maximum Calibration value for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetCalibrationDeadZoneMin(IOHIDElementRef inElementRef, CFIndex inValue) {
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationDeadZoneMinKey), inValue);
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} // IOHIDElement_SetCalibrationDeadZoneMin
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//*************************************************************************
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//
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// IOHIDElement_GetCalibrationDeadZoneMax( inElementRef )
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//
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// Purpose: get the maximum bounds near the midpoint of a logical value in which the value is ignored
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: CFIndex - the maximum Calibration value for this element
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//
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CFIndex IOHIDElement_GetCalibrationDeadZoneMax(IOHIDElementRef inElementRef) {
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CFIndex result;
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationDeadZoneMaxKey), &result) ) {
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementMinKey), &result) ) {
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result = -0x7FFFFFFF;
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}
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationDeadZoneMaxKey), result);
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}
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return (result);
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} // IOHIDElement_GetCalibrationDeadZoneMax
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//*************************************************************************
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//
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// IOHIDElement_SetCalibrationDeadZoneMax( inElementRef, inValue )
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//
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// Purpose: set the maximum bounds near the midpoint of a logical value in which the value is ignored
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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// inValue - the maximum Calibration value for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetCalibrationDeadZoneMax(IOHIDElementRef inElementRef, CFIndex inValue) {
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationDeadZoneMaxKey), inValue);
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} // IOHIDElement_SetCalibrationDeadZoneMax
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//*************************************************************************
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//
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// IOHIDElement_GetCalibrationGranularity( inElementRef )
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//
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// Purpose: get the level of detail returned for a calibrated element value
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: double_t - the maximum Calibration value for this element
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//
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double_t IOHIDElement_GetCalibrationGranularity(IOHIDElementRef inElementRef) {
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CFIndex result;
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationGranularityKey), &result) ) {
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if ( !IOHIDElement_GetLongProperty(inElementRef, CFSTR(kIOHIDElementMinKey), &result) ) {
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result = -0x7FFFFFFF;
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}
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationGranularityKey), result);
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}
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return (result);
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} // IOHIDElement_GetCalibrationGranularity
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//*************************************************************************
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//
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// IOHIDElement_SetCalibrationGranularity( inElementRef, inValue )
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//
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// Purpose: set the level of detail returned for a calibrated element value
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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// inValue - the the level of detail for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetCalibrationGranularity(IOHIDElementRef inElementRef, double_t inValue) {
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IOHIDElement_SetLongProperty(inElementRef, CFSTR(kIOHIDElementCalibrationGranularityKey), inValue);
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} // IOHIDElement_SetCalibrationGranularity
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//*************************************************************************
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//
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// IOHIDElement_SetupCalibration( inElementRef )
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//
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// Purpose: set default values for the element calibration parameters
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//
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// Inputs: inElementRef - the IOHIDElementRef for this element
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//
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// Returns: nothing
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//
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void IOHIDElement_SetupCalibration(IOHIDElementRef inIOHIDElementRef) {
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// these are the min/max values returned by IOHIDValueGetScaledValue( v, kIOHIDValueScaleTypeCalibrated );
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IOHIDElement_SetCalibrationMin( inIOHIDElementRef, IOHIDElementGetLogicalMin(inIOHIDElementRef) );
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IOHIDElement_SetCalibrationMax( inIOHIDElementRef, IOHIDElementGetLogicalMax(inIOHIDElementRef) );
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// this is the granularity of the values returned by IOHIDValueGetScaledValue( v, kIOHIDValueScaleTypeCalibrated );
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// for example if set to 0.1 the values returned will be multiples of 0.1 ( 0.1, 0.2, 0.3, etc. )
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IOHIDElement_SetCalibrationGranularity(inIOHIDElementRef, 0.);
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// these define the dead zone (like in the middel of joystick axis)
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IOHIDElement_SetCalibrationDeadZoneMin(inIOHIDElementRef, 0);
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IOHIDElement_SetCalibrationDeadZoneMax(inIOHIDElementRef, 0);
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#if 1
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// get the current value of this element
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double value = IOHIDElement_GetValue(inIOHIDElementRef, kIOHIDValueScaleTypePhysical);
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// use it as our min/mas saturation
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IOHIDElement_SetCalibrationSaturationMin(inIOHIDElementRef, value);
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IOHIDElement_SetCalibrationSaturationMax(inIOHIDElementRef, value);
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#else
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// calculate the middle physical value we would expect from this element
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CFIndex valueMin = IOHIDElementGetPhysicalMin(inIOHIDElementRef);
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CFIndex valueMax = IOHIDElementGetPhysicalMax(inIOHIDElementRef);
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CFIndex valueMid = (valueMin + valueMax) / 2;
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// use it as our min/mas saturation
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// this value determines the min/max values that have been recieved from the device element
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IOHIDElement_SetCalibrationSaturationMin(inIOHIDElementRef, valueMid);
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IOHIDElement_SetCalibrationSaturationMax(inIOHIDElementRef, valueMid);
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// get the current value of this element
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double value = IOHIDElement_GetValue(inIOHIDElementRef, kIOHIDValueScaleTypePhysical);
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// and use it to adjust the current saturation values if it's outside their range
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if ( value < IOHIDElement_GetCalibrationSaturationMin(inIOHIDElementRef) ) {
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IOHIDElement_SetCalibrationSaturationMin(inIOHIDElementRef, value);
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}
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if ( value > IOHIDElement_GetCalibrationSaturationMax(inIOHIDElementRef) ) {
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IOHIDElement_SetCalibrationSaturationMax(inIOHIDElementRef, value);
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}
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#endif
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} // IOHIDElement_SetupCalibration
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//*****************************************************
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#pragma mark - local (static) function implementations
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//-----------------------------------------------------
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//*************************************************************************
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//
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// IOHIDElement_GetLongProperty( inElementRef, inKey, outValue )
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//
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// Purpose: convieance function to return a long property of an element
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//
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// Inputs: inElementRef - the element
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// inKey - CFString for the key
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// outValue - address where to store the value
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// Returns: Boolean - TRUE if successful
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// outValue - the long property's value
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//
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Boolean IOHIDElement_GetLongProperty(IOHIDElementRef inElementRef, CFStringRef inKey, long *outValue) {
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Boolean result = FALSE;
|
|
|
|
CFTypeRef tCFTypeRef = IOHIDElementGetProperty(inElementRef, inKey);
|
|
if ( tCFTypeRef ) {
|
|
// if this is a number
|
|
if ( CFNumberGetTypeID() == CFGetTypeID(tCFTypeRef) ) {
|
|
// get it's value
|
|
result = CFNumberGetValue( (CFNumberRef) tCFTypeRef, kCFNumberSInt32Type, outValue );
|
|
}
|
|
}
|
|
|
|
return (result);
|
|
} /* IOHIDElement_GetLongProperty */
|
|
|
|
//*************************************************************************
|
|
//
|
|
// IOHIDElement_SetLongProperty( inElementRef, inKey, inValue )
|
|
//
|
|
// Purpose: convieance function to set a long property of an element
|
|
//
|
|
// Inputs: inElementRef - the element
|
|
// inKey - CFString for the key
|
|
// inValue - the value to set it to
|
|
//
|
|
// Returns: nothing
|
|
//
|
|
|
|
void IOHIDElement_SetLongProperty(IOHIDElementRef inElementRef, CFStringRef inKey, long inValue) {
|
|
CFNumberRef tCFNumberRef = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &inValue);
|
|
if ( tCFNumberRef ) {
|
|
IOHIDElementSetProperty(inElementRef, inKey, tCFNumberRef);
|
|
CFRelease(tCFNumberRef);
|
|
}
|
|
} // IOHIDElement_SetLongProperty
|
|
|
|
//*****************************************************
|