/*  ControlLayer - A component to render user interactions with the board.  Copyright (C) 2002,2003 Andreas Rueckert <mail@andreas-rueckert.de>  This program is free software; you can redistribute it and/or  modify it under the terms of the GNU General Public License  as published by the Free Software Foundation; either version 2  of the License, or (at your option) any later version.  This program is distributed in the hope that it will be useful,  but WITHOUT ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  GNU General Public License for more details.  You should have received a copy of the GNU General Public License  along with this program; if not, write to the Free Software  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.*/package de.java_chess.javaChess.renderer2d;import de.java_chess.javaChess.*;import de.java_chess.javaChess.ply.*;import de.java_chess.javaChess.position.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;/** * This class handles the control layer, where the user enters his moves. */class ControlLayer extends JPanel {    // Instance variables.    /**     * The game controller.     */    GameController _controller;    /**     * The pieces layer, that holds the chess pieces.     */    PiecesLayer _piecesLayer;    /**     * The size of one square as a instance variable for caching purposes.     */    int _squareSize;    /**     * The size of the entire board as a instance var for caching purposes.     */    int _boardSize;    /**     * The source square for the next ply.     */    int _sourceSquare = -1;    // Constructors    ControlLayer( GameController controller, PiecesLayer pl) {	setController( controller);        _squareSize = ChessBoardRenderer2D.getSquareSize();        _boardSize = 8 * _squareSize;	setLayout(null);	setOpaque(false);	setPreferredSize( new Dimension( _boardSize, _boardSize));	setBounds( 0, 0, _boardSize, _boardSize);	_piecesLayer = pl;	addMouseListener(new MouseAdapter() {		public void mouseClicked( MouseEvent e) {		    if( _sourceSquare == -1) {			_sourceSquare = 8 * ( 7 - e.getY() / _squareSize) + ( e.getX() / _squareSize);			repaint();		    } else {			final int destSquare = 8 * ( 7 - e.getY() / _squareSize) + ( e.getX() / _squareSize);			new Thread( new Runnable() {				public void run() {				    // The capture flag is added by the game controller(!).				    getController().userPly( new PlyImpl( new PositionImpl( _sourceSquare), new PositionImpl( destSquare), false));				    _sourceSquare = -1;				    repaint();				}			    }).start();			//  getController().userPly( new PlyImpl( new PositionImpl( _sourceSquare), new PositionImpl( destSquare)));			//  _sourceSquare = -1;			//  repaint();		    }		}	    });    }    // Methods    /**     * Overridden  paintComponent method to draw the marker for     * the source square.     *     * @param g The graphics context.     */    public void paintComponent( Graphics g) {	if( _sourceSquare != -1) {          // If a source square is selected,	    markSquare( _sourceSquare, g);  // mark it.	}    }    /**     * Draw a marker at the given square.     *     * @param square The square to mark.     * @param g The graphics context.     */    private final void markSquare( int square, Graphics g) {	int xpos = ( square & 7) * _squareSize;         // Compute the location of the	int ypos = ( 7 - (square >> 3)) * _squareSize;  // square	int rectSize = _squareSize - 1;                 // and it's size.	g.setColor( Color.blue);                        // Simply draw a blue frame there.	for( int i = 0; i < 3; i++) {	    g.drawRect( xpos++, ypos++, rectSize, rectSize);	    rectSize -= 2;	}    }    /**     * Get the game controller.     *     * @return The game controller.     */    private final GameController getController() {	return _controller;    }    /**     * Set a new game controller.     *     * @param The new game controller.     */    private final void setController( GameController controller) {	_controller = controller;    }}