cross sums.txt

用java编写的puzzle游戏

//----------------------------------------------------------------------
//	Cross Sums
//----------------------------------------------------------------------

import java.awt.*;
import java.applet.*;
import java.lang.*;
import java.io.*;
import java.util.*;
import java.net.*;

public class CrossSum extends Applet {
	public  String	 postpage;

	String	probfile;

	DatabaseAccess  db    = null;
	DatabaseIF      dbif  = null;

	int	unitsize = 0;
	int	fontsize = 0;
	boolean	 first   = true;
	Color	 controlPanelcolor;

	Panel		controlPanel;
	Checkbox	hintbox;
	Choice	  	dbchoice;

	PlayPanel	playPanel;

	Font	boldfont = new java.awt.Font( "Helvetica", 0, 18 );


	public void init() {
		dbif = new DatabaseIF( this, getParentFrame() );

		postpage = getParameter("post");

		probfile = getParameter("problemfile");

		db.problemid = getParameter("problemid");

		String str = getParameter("unitsize");
		if( str != null ) {
			try {
				unitsize = (Integer.valueOf(str)).intValue();
			} catch( NoSuchElementException e ) {}
		}

		str = getParameter("fontsize");
		if( str != null ) {
			try {
				fontsize = (Integer.valueOf(str)).intValue();
			} catch( NoSuchElementException e ) {}
		}

		setLayout( new BorderLayout() );

		controlPanel = new Panel();
		controlPanel.setFont( boldfont );
		add( "North", controlPanel );
		controlPanel.setLayout( new FlowLayout( FlowLayout.CENTER, 30, 2 ) );

		controlPanelcolor = controlPanel.getBackground();

		hintbox = new Checkbox( "Hint" );
		hintbox.setFont( boldfont );
		controlPanel.add( hintbox );
		controlPanel.add( new ControlButton( this, "Clear" ) );
		controlPanel.add( new ControlButton( this, "Check" ) );

//		if( db.problemid != null ) {
//			dbchoice = new Choice();
//			dbchoice.setFont(boldfont);
//			dbchoice.addItem( "Database" );
//			dbchoice.addItem( "Register" );
//			dbchoice.addItem( "Enter" );
//			dbchoice.addItem( "Save" );
//			dbchoice.addItem( "Load" );
//			dbchoice.addItem( "View" );
//			dbchoice.addItem( "Answer" );
//			controlPanel.add( dbchoice );
//		}

		playPanel = new PlayPanel( this );
		add( "Center", playPanel );
		
		Label  copyright = new Label( "Cross Sums" + "  " + 
						"Copyright(C).",
					Label.CENTER );
		add( "South", copyright );

		if( probfile!=null && first ) {
			first = false;
			playPanel.loadData( probfile );
		}
		playPanel.canvas.resizeCanvas();
	}


	public boolean keyDown( Event evt, int key ) {
		CrosssumCanvas cc = playPanel.canvas;
		if( key == Event.UP ) {
			cc.moveCurXY( 0, -1 );
			return true;
		}
		if( key == Event.DOWN ) {
			cc.moveCurXY( 0, +1 );
			return true;
		}
		if( key == Event.LEFT ) {
			cc.moveCurXY( -1, 0 );
			return true;
		}
		if( key == Event.RIGHT ) {
			cc.moveCurXY( +1, 0 );
			return true;
		}
		if( key == '\n' ) {
			hintbox.setState( playPanel.ishint = ! playPanel.ishint );
			return true;
		}

		if( key == ' ' ) {
			playPanel.changeValue( 0, true );
			return true;
		}

		int keynum = key - '0';
		if( 0<=keynum && keynum<10 ) {
			playPanel.changeValue( keynum, true );
			return true;
		}

		return true;
	}


	Frame getParentFrame() {
		Component co = this;
		while(!((co = co.getParent()) instanceof Frame)) {}

		return (Frame) co;
	}


	public boolean action( Event evt, Object obj ) {
		if( evt.target == hintbox ) {
			playPanel.ishint = hintbox.getState();
			return true;
		}
		return false;
	}
}


class  PlayPanel extends Panel {
	CrossSum	app;
	DatabaseAccess	db;
	GridBagLayout	gbl;
	CrosssumCanvas	canvas;
	Cell            table[][];

	boolean		ishint;

	int		curX = -1;
	int		curY = -1;

	int	bdwidth  = 20;
	int	bdheight = 20;
	int	bdunit   = 32;

	int		fw, fh;


	PlayPanel( CrossSum p ) {
		app = p;
		db  = app.db;

		if( app.unitsize > 0 )
			bdunit = app.unitsize;

		newBoard();

		canvas = new CrosssumCanvas( this );
		add( canvas );
	}


	Cell cell() {
		return	cell( curX, curY );
	}

	Cell cell( int x, int y ) {
		if( x < 0 || bdwidth <= x || y < 0 || bdheight <= y )
			return	null;

		return	table[x][y]; 
	}


	void newBoard() {
		table = new Cell[bdwidth][bdheight];

		for( int x=0; x<bdwidth; ++x ) {
			for( int y=0; y<bdheight; ++y ) {
				table[x][y] = new Cell();
			}
		}

		int	curX = -1;
		int	curY = -1;

		db.history.clear();
		db.isviewdata = false;
	}


	void loadData( String filename ) {
		URL		url;
		DataInputStream file;
		try {
			url = new URL( app.getCodeBase(), filename );
			file = new DataInputStream( url.openStream() );
		} catch( MalformedURLException e ) {
			app.showStatus( "file name error : " + filename );
			return;
		} catch( IOException e ) {
			app.showStatus( "file open error : " + filename );
			return;
		}

		String line;

		try {
			int x, y, v, h;

		    nextline:
			for(;;) {
				line=file.readLine();

				if( line == null )
					break;
				if( '#' == line.charAt(0) )
					continue;

				StringTokenizer st = new StringTokenizer(line);
				try {
					String tk = st.nextToken();

					if( tk.equals("size") ) {
						tk = st.nextToken();
						bdwidth = (Integer.valueOf(tk)).intValue();
						tk = st.nextToken();
						bdheight = (Integer.valueOf(tk)).intValue();
						newBoard();
						continue nextline;
					}

					if( tk.equals("begin") ) {
						continue nextline;
					}
					if( tk.equals("end") ) {
						break nextline;
					}

					x = (Integer.valueOf(tk)).intValue();
					tk = st.nextToken();
					y = (Integer.valueOf(tk)).intValue();
					tk = st.nextToken();
					v = (Integer.valueOf(tk)).intValue();
					tk = st.nextToken();
					h = (Integer.valueOf(tk)).intValue();
					table[x][y].setMark( v, h );
				} catch( NoSuchElementException e ) {}
			}
		} catch( IOException e ) {}
	}


	void clearview() {
		for( int x=0; x<bdwidth; ++x ) {
			for( int y=0; y<bdheight; ++y ) {
				table[x][y].clear();
			}
		}
		app.hintbox.setState( ishint = false );

		canvas.paintFull();
		canvas.paint( canvas.getGraphics() );
		app.controlPanel.setBackground( app.controlPanelcolor );
	}

	void clear() {
		clearview();

		db.isviewdata = false;
		db.history.clear();
	}


	void check() {
		boolean	bad = checkerror();

		if( bad ) {
			app.controlPanel.setBackground( Color.red );
		} else {
			app.controlPanel.setBackground( Color.green );
		}
		canvas.paintFull();
		canvas.paint( canvas.getGraphics() );

		if( (!bad) && (app.postpage != null) ) {
			try {
				URL url = new URL( app.getCodeBase() + app.postpage );
				app.getAppletContext().showDocument( url );
			} catch( MalformedURLException e ) { }
		}
	}

	boolean checkerror() {
		boolean	err = false;

		for( int x=0; x<bdwidth; ++x ) {
			for( int y=0; y<bdheight; ++y ) {
				Cell c = table[x][y];
				c.verror = c.herror = c.error = false;
			}
		}

		for( int x=0; x<bdwidth; ++x ) {
			for( int y=0; y<bdheight; ++y ) {
				Cell c = table[x][y];
				if( ! c.mark )
					continue;

				if( c.vsum > 0 ) {
					int array[] = new int[10];
					int sum = 0;
					int len = 0;
					for( int k=1; k<10; ++k ) {
						if( y+k >= bdheight )
							break;
						Cell cc = table[x][y+k];
						if( cc.mark )
							break;
						++len;
						++array[cc.value];
						sum += cc.value;
					}

					if( sum != c.vsum ) {
						c.verror = true;
						err = true;
					}

					for( int k=1; k<10; ++k ) {
						if( array[k] == 1 )
							array[k] = 0;
					}
					for( int k=1; k<=len; ++k ) {
						Cell cc = table[x][y+k];
						if( array[cc.value] == 0 )
							continue;
						cc.error = true;
						c.verror = true;
						err = true;
					}
				}


				if( c.hsum > 0 ) {
					int array[] = new int[10];
					int sum = 0;
					int len = 0;
					for( int k=1; k<10; ++k ) {
						if( x+k >= bdwidth )
							break;
						Cell cc = table[x+k][y];
						if( cc.mark )
							break;
						++len;
						++array[cc.value];
						sum += cc.value;
					}
					if( sum != c.hsum ) {
						c.herror = true;
						err = true;
					}
					for( int k=1; k<10; ++k ) {
						if( array[k] == 1 )
							array[k] = 0;
					}
					for( int k=1; k<=len; ++k ) {
						Cell cc = table[x+k][y];
						if( array[cc.value] == 0 )
							continue;
						cc.error = true;
						c.herror = true;
						err = true;
					}
				}
			}
		}

		return	err;
	}