Add support for the hat switch. This only works if the hid device uses 3 or 7 values plus a null position for the hat and furthermore, the minimum value needs to correspond to up with increasing values moving clockwise.

stepmania/src/archutils/Darwin/JoystickDevice.cpp

@@ -1,6 +1,7 @@
 #include "global.h"
 #include "JoystickDevice.h"
 #include "RageUtil.h"
+#include "RageLog.h"
 #include "Foreach.h"
 
 using namespace std;
@@ -12,7 +13,8 @@ Joystick::Joystick() :	id( InputDevice_Invalid ),
 			z_axis( 0 ), z_min( 0 ), z_max( 0 ),
 			x_rot( 0 ), rx_min( 0 ), rx_max( 0 ),
 			y_rot( 0 ), ry_min( 0 ), ry_max( 0 ),
-			z_rot( 0 ), rz_min( 0 ), rz_max( 0 )
+			z_rot( 0 ), rz_min( 0 ), rz_max( 0 ),
+			hat( 0 ), hat_min( 0 ), hat_max( 0 )
 {
 }
 
@@ -35,6 +37,9 @@ bool JoystickDevice::AddLogicalDevice( int usagePage, int usage )
 
 void JoystickDevice::AddElement( int usagePage, int usage, int cookie, const CFDictionaryRef properties )
 {
+	if( usagePage >= kHIDPage_VendorDefinedStart )
+		return;
+
 	ASSERT( m_vSticks.size() );
 	Joystick& js = m_vSticks.back();
 
@@ -92,6 +97,18 @@ void JoystickDevice::AddElement( int usagePage, int usage, int cookie, const CFD
 		case kHIDUsage_GD_DPadLeft:
 			js.mapping[cookie] = JOY_LEFT;
 			break;
+		case kHIDUsage_GD_Hatswitch:
+		{
+			if( iMax - iMin != 7 && iMax - iMin != 3 )
+				break;
+			js.hat = cookie;
+			js.hat_min = iMin;
+			js.hat_max = iMax;
+			break;
+		}
+		default:
+			LOG->Warn( "Unknown usagePage usage pair: (kHIDPage_GenericDesktop, %d).", usage );
+			break;
 		}
 		break;
 	}
@@ -101,8 +118,13 @@ void JoystickDevice::AddElement( int usagePage, int usage, int cookie, const CFD
 	
 		if( buttonID <= JOY_BUTTON_32 )
 			js.mapping[cookie] = buttonID;
+		else
+			LOG->Warn( "Button id too large: %d.", int(buttonID) );
 		break;
 	}
+	default:
+		//LOG->Warn( "Unknown usagePage usage pair: (%d, %d).", usagePage, usage );
+		break;
 	} // end switch (usagePage)
 }
 
@@ -115,6 +137,7 @@ void JoystickDevice::Open()
 #define ADD(x) if( js.x ) AddElementToQueue( js.x )
 		ADD( x_axis );	ADD( y_axis );	ADD( z_axis );
 		ADD( x_rot );	ADD( y_rot );	ADD( z_rot );
+		ADD( hat );
 #undef ADD		
 		for( hash_map<int,DeviceButton>::const_iterator j = js.mapping.begin(); j != js.mapping.end(); ++j )
 			AddElementToQueue( j->first );
@@ -188,6 +211,30 @@ void JoystickDevice::GetButtonPresses( vector<DeviceInput>& vPresses, int cookie
 			vPresses.push_back( DeviceInput(js.id, JOY_ROT_Z_DOWN, max(level, 0.0f), now) );
 			break;
 		}
+		else if( js.hat == cookie )
+		{
+			float levelUp = 0.f, levelRight = 0.f, levelDown = 0.f, levelLeft = 0.f;
+			
+			value -= js.hat_min; // Probably just subtracting 0.
+			if( js.hat_max - js.hat_min == 3 )
+				value *= 2;
+			switch( value )
+			{
+			case 0:	levelUp = 1.f;					break;	// U
+			case 1:	levelUp = 1.f;		levelRight = 1.f;	break;	// UR
+			case 2:				levelRight = 1.f;	break;	// R
+			case 3:	levelDown = 1.f;	levelRight = 1.f;	break;	// DR
+			case 4:	levelDown = 1.f;				break;	// D
+			case 5:	levelDown = 1.f;	levelLeft = 1.f;	break;	// DL
+			case 6:				levelLeft = 1.f;	break;	// L
+			case 7: levelUp = 1.f;		levelLeft = 1.f;	break;	// UL
+			}
+			vPresses.push_back( DeviceInput(js.id, JOY_HAT_UP,	levelUp,	now) );
+			vPresses.push_back( DeviceInput(js.id, JOY_HAT_RIGHT,	levelRight,	now) );
+			vPresses.push_back( DeviceInput(js.id, JOY_HAT_DOWN,	levelDown,	now) );
+			vPresses.push_back( DeviceInput(js.id, JOY_HAT_LEFT,	levelLeft,	now) );
+			break;
+		}
 		else
 		{
 			// hash_map<T,U>::operator[] is not const

stepmania/src/archutils/Darwin/JoystickDevice.h

@@ -15,6 +15,7 @@ struct Joystick
 	int x_rot, rx_min, rx_max;
 	int y_rot, ry_min, ry_max;
 	int z_rot, rz_min, rz_max;
+	int hat, hat_min, hat_max;
 	
 	Joystick();
 };