Puzzle

import java.awt.*; import java.awt.event.*; import java.applet.*; import java.util.*; public class Puzzle extends Applet { int aFields[][]; //Brett mit allen Feldern Image image; //Bildspeicher int bordersize; //Randbreite Dimension fieldsize; //Größe eines Feldes Dimension imagesize; //Größe des Bildes Point sourcefield; //Bei Mausklick ausgewähltes Feld Point lastpoint; //Ursprung des letzten Rechtecks Point drawoffset; //Offset zur Mausdragposition public void init() { aFields = new int[4][4]; sourcefield = new Point(-1, -1); lastpoint = new Point(-1, -1); drawoffset = new Point(0,0); bordersize = Integer.parseInt(getParameter("bordersize")); if (bordersize <> 50) { bordersize = 5; } setBackground(Color.lightGray); addMouseListener(new MyMouseListener()); addMouseMotionListener(new MyMouseMotionListener()); prepareImage(); randomizeField(true); } public void update(Graphics g) { Image dbImage; Graphics dbGraphics; //Double-Buffer initialisieren dbImage = createImage(getSize().width,getSize().height); dbGraphics = dbImage.getGraphics(); //Hintergrund löschen dbGraphics.setColor(getBackground()); dbGraphics.fillRect(0,0,getSize().width,getSize().height); //Vordergrund zeichnen dbGraphics.setColor(getForeground()); paint(dbGraphics); //Offscreen-Image anzeigen g.drawImage(dbImage,0,0,this); dbGraphics.dispose(); } public void paint(Graphics g) { paintBorder(g); paintField(g); } /** * Zeichnet den Rahmen des Spielbretts. */ private void paintBorder(Graphics g) { Insets insets = getInsets(); Dimension size = getSize(); size.height -= insets.top + insets.bottom; size.width -= insets.left + insets.right; fieldsize = new Dimension(); fieldsize.width = (size.width - (2 * bordersize)) / 4; fieldsize.height = (size.height - (2 * bordersize)) / 4; g.setColor(Color.black); g.drawRect( insets.left, insets.top, size.width - 1, size.height - 2 ); g.drawRect( insets.left + bordersize, insets.top + bordersize, 4 * fieldsize.width, 4 * fieldsize.height ); } /** * Zeichnet die Spielsteine auf dem Brett. */ private void paintField(Graphics g) { int imagenumber, image_i, image_j; Insets insets = getInsets(); Point topleft = new Point(); topleft.x = insets.left + bordersize; topleft.y = insets.top + bordersize; g.setColor(Color.black); for (int i = 0; i <{ for (int j="0;" j <="3;" ++j) { imagenumber="aFields[i][j];" if (imagenumber="=" 15) { //Lücke zeichnen g.fillRect( topleft.x + j * fieldsize.width, topleft.y + i * fieldsize.height, fieldsize.width, fieldsize.height ); } else { //Image darstellen image_i="imagenumber" / 4; image_j="imagenumber" % 4; g.drawImage( image, topleft.x + j * fieldsize.width, topleft.y + i * fieldsize.height, topleft.x + j * fieldsize.width + fieldsize.width, topleft.y + i * fieldsize.height + fieldsize.height, image_j * (imagesize.width / 4), image_i * (imagesize.height / 4), image_j * (imagesize.width / 4) + imagesize.width / 4, image_i * (imagesize.height / 4) + imagesize.height / 4, this ); //Rahmen g.drawRect( topleft.x + j * fieldsize.width, topleft.y + i * fieldsize.height, fieldsize.width, fieldsize.height ); //Beschriftung g.drawString( "" + imagenumber, topleft.x + j * fieldsize.width + 2, topleft.y + i * fieldsize.height + 12 ); } } } } /** * Lädt das Bild. */ private void prepareImage() { //Bild laden image="getImage(getDocumentBase(),getParameter("src"));" MediaTracker mt="new" MediaTracker(this); mt.addImage(image, 0); try { //Warten, bis das Image vollständig geladen ist, mt.waitForAll(); } catch (InterruptedException e) { //nothing } imagesize="new" Dimension(); imagesize.height="image.getHeight(this);" imagesize.width="image.getWidth(this);" } /** * Mischt die Steine auf dem Spielfeld. */ private void randomizeField(boolean unordered) { int i, j, k, tmp; //Zuerst sortieren... for (i="0;" i <="15;" ++i) { aFields[i / 4][i % 4]="i;" } //Dann mischen... if (unordered) { Random rand="new" Random(System.currentTimeMillis()); for (i="0;" i < 20; ++i) { j="Math.abs(rand.nextInt())" % 16; k="Math.abs(rand.nextInt())" % 16; tmp="aFields[j" / 4][j % 4]; aFields[j / 4][j % 4]="aFields[k" / 4][k % 4]; aFields[k / 4][k % 4]="tmp;" } } } class MyMouseListener extends MouseAdapter { /** * Maustaste gedrückt. */ public void mousePressed(MouseEvent event) { sourcefield="getFieldFromCursor(event.getX()," event.getY()); if (sourcefield.x="=" 1 || sourcefield.y="=" 1) { swapRandomization(); repaint(); } lastpoint.x="-1;" lastpoint.y="-1;" } /** * Maustaste losgelassen. */ public void mouseReleased(MouseEvent event) { if (sourcefield.x !="-1" && sourcefield.y !="-1)" { Point destfield; destfield="getFieldFromCursor(event.getX()," event.getY()); if (destfield.x !="-1" && destfield.y !="-1)" { if (aFields[destfield.y][destfield.x]="=" 15) { if (areNeighbours(sourcefield, destfield)) { aFields[destfield.y][destfield.x]="aFields[sourcefield.y][sourcefield.x];" aFields[sourcefield.y][sourcefield.x]="15;" } } } repaint(); } sourcefield.x="-1;" sourcefield.y="-1;" } /** * Liefert den zur Mausposition passenden horizontalen und * vertikalen Index des darunterliegenden Steins. Liegt der * Punkt auf dem Rahmen, wird (-1,-1) zurückgegeben. */ private Point getFieldFromCursor(int x, int y) { Insets insets="getInsets();" Point topleft="new" Point(); topleft.x="insets.left" + bordersize; topleft.y="insets.top" + bordersize; Point ret="new" Point(-1, 1); if (x>= topleft.x) { if (x <* fieldsize.width) { if (y>= topleft.y) { if (y <* fieldsize.height) { ret.x="(x" topleft.x) / fieldsize.width; ret.y="(y" topleft.y) / fieldsize.height; drawoffset.x="x" topleft.x ret.x * fieldsize.width; drawoffset.y="y" topleft.y ret.y * fieldsize.height; } } } } return ret; } /** * Testet, ob die durch p1 und p2 bezeichneten Spielsteine * Nachbarn sind. */ private boolean areNeighbours(Point p1, Point p2) { int aNeighbours[][]="{{-1,0},{0,-1},{0,1},{1,0}};" for (int i="0;" i < aNeighbours.length; ++i) { if (p1.x + aNeighbours[i][0]="=" p2.x) { if (p1.y + aNeighbours[i][1]="=" p2.y) { return true; } } } return false; } /** * Kehrt die Steineordnung um: falls sie sortiert sind, * werden sie gemischt und umgekehrt. */ private void swapRandomization() { //Sind die Felder sortiert? boolean sorted="true;" for (int i="0;" i <="15;" ++i) { if (aFields[i / 4][i % 4] !="i)" { sorted="false;" break; } } //Neu mischen bzw. sortieren randomizeField(sorted); } } class MyMouseMotionListener extends MouseMotionAdapter { /** * Maus wurde bei gedrückter Taste bewegt. */ public void mouseDragged(MouseEvent event) { if (sourcefield.x !="-1" && sourcefield.y !="-1)" { Graphics g="getGraphics();" g.setXORMode(getBackground()); g.setColor(Color.black); //Das zuletzt gezeichnete Rechteck entfernen if (lastpoint.x !="-1)" { g.drawRect( lastpoint.x drawoffset.x, lastpoint.y drawoffset.y, fieldsize.width, fieldsize.height ); } //Neues Rechteck zeichnen g.drawRect( event.getX() drawoffset.x, event.getY() drawoffset.y, fieldsize.width, fieldsize.height ); lastpoint.x="event.getX();" lastpoint.y="event.getY();" g.dispose(); } } } }>

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