Import from http://drts.cvs.sourceforge.net/viewvc/drts/projects/jxinput/ tarball

java/de/hardcode/jxinput/directinput/DirectInputDriver.java

@@ -0,0 +1,184 @@
+//**********************************************************************************************
+//		(C) Copyright 2002 by Dipl. Phys. Joerg Plewe, HARDCODE Development
+//		All rights reserved. Copying, modification,
+//		distribution or publication without the prior written
+//		consent of the author is prohibited.
+//
+//	Created on 19. Dezember 2001, 22:44
+//**********************************************************************************************
+package de.hardcode.jxinput.directinput;
+
+import java.lang.reflect.Array;
+
+/**
+ * DirectInputDriver: the connection to the Win32 joystick.
+ * There is only one allowed, so the layout of this class is merely static.
+ * 
+ * History:
+ * 
+ * Changes since 0.1beta:
+ *  - support of multiple devices addressed by the <code>dev</code> index
+ * 
+ *
+ * @author Herkules
+ * @version 0.2beta
+ */
+class DirectInputDriver
+{
+	private final static String NATIVE_LIB_NAME = "jxinput";
+	
+	/** Remember wether nativeinit() succeeded. */
+	static boolean sIsOperational = false;
+	
+	//
+	// Static arrays to hold the values.
+	//
+	private static double	[][] sAxisValues;
+	private static boolean	[][] sButtonStates;
+	private static int		[][] sDirectionalValues;
+
+	/**
+	 * Perform the static initialization.
+	 */
+	static 
+	{
+		try
+		{
+			// Load the native lib.
+			System.loadLibrary( NATIVE_LIB_NAME );
+			
+            init();
+		}
+		catch( SecurityException e )
+		{	
+			Log.logger.warning("Native library jxinput not loaded due to a SecurityException.");
+		}
+		catch( UnsatisfiedLinkError e )
+		{
+			Log.logger.info("Native library jxinput not loaded due to an UnsatisfiedLinkError.");
+		}
+	}		
+	
+	
+    private final static void init()
+    {
+        sIsOperational		= false;
+        //
+        // Initialize it.
+        //
+        if ( nativeinit() )
+        {
+            int devs			= getNumberOfDevices();
+            sAxisValues			= new double	[ devs ][ DirectInputDriver.getMaxNumberOfAxes()			];
+            sButtonStates		= new boolean	[ devs ][ DirectInputDriver.getMaxNumberOfButtons()			];
+            sDirectionalValues	= new int		[ devs ][ DirectInputDriver.getMaxNumberOfDirectionals()	];
+
+            // Bind the native lib to my variables.
+            bind();
+
+            // Remember I am fine.
+            sIsOperational		= true;
+        }
+        
+    }
+    
+    
+	/** 
+	 * Static ctor of DirectInputDriver.
+	 * No object will be created due to the static layout.
+	 */
+	private DirectInputDriver()
+	{
+	}
+		
+	// Administration
+	private static native   boolean     nativeinit();
+	private static native   void        nativeexit();
+	private static native   void        bind();
+
+    static native           int         getNumberOfDevices();
+    
+	// Configuration
+	static native           String      getName( int dev );
+	static native           int         getNumberOfAxes( int dev );
+	static native           int         getNumberOfButtons( int dev );
+	static native           int         getNumberOfDirectionals( int dev );
+	static native           int         getMaxNumberOfAxes();
+	static native           int			getMaxNumberOfButtons();
+	static native			int			getMaxNumberOfDirectionals();
+		
+	static native			boolean		isAxisAvailable( int dev, int idx );
+	static native			String		getAxisName( int dev, int idx );
+	static native			int			getAxisType( int dev, int idx );
+
+	static native			boolean		isButtonAvailable( int dev, int idx );
+	static native			String		getButtonName( int dev, int idx );
+	static native			int			getButtonType( int dev, int idx );
+
+	static native			boolean		isDirectionalAvailable( int dev, int idx );
+	static native			String		getDirectionalName( int dev, int idx );
+	
+	// Operation
+	static native			void		nativeupdate();
+
+	
+	public static boolean isAvailable()
+	{
+		return sIsOperational;
+	}
+	
+	
+    /**
+     * Shutdown the device and free all Win32 resources.
+     * It is not a good idea to access any joystick features after
+     * <code>shutdown()</code>.
+     */ 
+	static void shutdown()
+	{
+		nativeexit();
+        sAxisValues = null;
+        sButtonStates = null;
+        sDirectionalValues = null;
+    }
+
+    
+    /**
+     * Reset the device and free all Win32 resources.
+     */ 
+	static void reset()
+	{
+		shutdown();
+        init();
+    }
+	
+	static double getAxisValue( int dev, int idx )
+	{
+		return sAxisValues[ dev ][ idx ];
+	}
+	
+	static boolean getButtonState( int dev, int idx )
+	{
+		return sButtonStates[ dev ][ idx ];
+	}
+
+	static int getDirection( int dev, int idx )
+	{
+		return sDirectionalValues[ dev ][ idx ];
+	}
+
+    /**
+    * @param args the command line arguments
+    */
+    public static void main (String args[]) 
+	{
+
+		if ( ! sIsOperational )
+			return;
+		
+		for( int i = 0; i < 5000; ++i )
+			nativeupdate();
+
+		shutdown();
+    }	
+
+}