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

java/de/hardcode/jxinput/keyboard/KeyboardDriver.java

@@ -0,0 +1,141 @@
+//**********************************************************************************************
+//		(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 9. April 2002, 22:43
+//**********************************************************************************************
+package de.hardcode.jxinput.keyboard;
+
+import java.awt.event.KeyListener;
+import java.awt.event.KeyEvent;
+import java.util.HashMap;
+import java.security.InvalidParameterException;
+
+
+
+/**
+ * Listen to a JComponent handle handle all associated button objects.
+ * This is the main worker class for JXKeyboardInputDevice.
+ * 
+ * @author  Herkules
+ */
+class KeyboardDriver implements KeyListener
+{
+//	HashMap mKeysToObserveMap = new HashMap();
+	
+	int mNumberOfKeysObserved = 0;
+	KeyButton [] mKeysObserved = new KeyButton [ 0x100 ];
+	
+	
+	/**
+	 * Creates a new instance of KeyboardDriver.
+	 */
+	public KeyboardDriver()
+	{
+	}
+
+	
+	/**
+	 * How many buttons are registered?
+	 */
+	final int getNumberOfButtons()
+	{
+		return mNumberOfKeysObserved;
+//		return mKeysToObserveMap.size();
+	}
+	
+	
+	/** 
+	 * Place a new button under my observation.
+	 */
+	final boolean registerKeyButton( KeyButton b )
+	{
+		final int keycode = b.getKeyCode();
+
+		if ( 0 > keycode  ||  0x100 < keycode )
+			throw new InvalidKeyCodeException();
+		
+		if ( null == mKeysObserved[ keycode ] )
+		{
+			mKeysObserved[ keycode ] = b;
+			mNumberOfKeysObserved++;
+			return true;
+		}
+		else
+		{
+			return false;
+		}
+		
+//		Integer code = new Integer( b.getKeyCode() );
+//		if ( ! mKeysToObserveMap.containsKey( code ) )
+//		{
+//			mKeysToObserveMap.put( code, b );
+//			return true;
+//		}
+//		else
+//		{
+//			return false;
+//		}
+	}
+	
+	final void unregisterKeyButton( KeyButton b )
+	{
+		final int keycode = b.getKeyCode();
+		
+		if ( 0 > keycode  ||  0x100 < keycode )
+			throw new InvalidKeyCodeException();
+
+		if ( null != mKeysObserved[ b.getKeyCode() ] )
+		{
+			mKeysObserved[ keycode ] = null;
+			mNumberOfKeysObserved--;
+		}
+		
+//		Integer code = new Integer( b.getKeyCode() );
+//		mKeysToObserveMap.remove( code );
+	}
+	
+	
+	/**
+	 * Retrieve the button from its keycode.
+	 */
+	final KeyButton getButton( int keycode )
+	{
+		if ( 0 > keycode  ||  0x100 < keycode )
+			throw new InvalidKeyCodeException();
+
+		return mKeysObserved[ keycode ];
+
+//		Integer code = new Integer( keycode );
+//		return (KeyButton)mKeysToObserveMap.get( code );
+	}
+	
+	
+	//*********************************************************************************************
+	//
+	// Implement KeyListener
+	//
+	//*********************************************************************************************
+	
+	public void keyPressed( KeyEvent keyEvent )
+	{
+		KeyButton b = getButton( keyEvent.getKeyCode() );
+		if ( null != b )
+			b.setIsPressed( true );
+	}
+	
+	public void keyReleased( KeyEvent keyEvent )
+	{
+		KeyButton b = getButton( keyEvent.getKeyCode() );
+		if ( null != b )
+			b.setIsPressed( false );
+	}
+	
+	public void keyTyped( KeyEvent keyEvent )
+	{
+		// Intentionally empty.
+	}
+	
+}