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import java.awt.*; import java.awt.event.*; import java.applet.*; import java.util.*; public class Schiebepuzzle extends Applet { int aFields[][]; Image image; int bordersize; Dimension fieldsize; Dimension imagesize; Point sourcefield; Point lastpoint; Point drawoffset; 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 < 1 || 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; dbImage = createImage(getSize().width,getSize().height); dbGraphics = dbImage.getGraphics(); dbGraphics.setColor(getBackground()); dbGraphics.fillRect(0,0,getSize().width,getSize().height); dbGraphics.setColor(getForeground()); paint(dbGraphics); g.drawImage(dbImage,0,0,this); dbGraphics.dispose(); } public void paint(Graphics g) { paintBorder(g); paintField(g); } 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); } 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 <= 3; ++i) { for (int j = 0; j <= 3; ++j) { imagenumber = aFields[i][j]; if (imagenumber == 15) { g.fillRect(topleft.x + j * fieldsize.width, topleft.y + i * fieldsize.height,fieldsize.width,fieldsize.height); } else { 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 ); g.drawRect(topleft.x + j * fieldsize.width, topleft.y + i * fieldsize.height, fieldsize.width, fieldsize.height); g.drawString("" + imagenumber, topleft.x + j * fieldsize.width + 2,topleft.y + i * fieldsize.height + 12); } } } } 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); } private void randomizeField(boolean unordered) { int i, j, k, tmp; for (i = 0; i <= 15; ++i) { aFields[i / 4][i % 4] = i; } 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 { 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; } 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; } 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 < topleft.x + 4 * fieldsize.width) { if (y >= topleft.y) { if (y < topleft.y + 4 * 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; } 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; } private void swapRandomization() { boolean sorted = true; for (int i = 0; i <= 15; ++i) { if (aFields[i / 4][i % 4] != i) { sorted = false; break; } } randomizeField(sorted); } } class MyMouseMotionListener extends MouseMotionAdapter { public void mouseDragged(MouseEvent event) { if (sourcefield.x != -1 && sourcefield.y != -1) { Graphics g = getGraphics(); g.setXORMode(getBackground()); g.setColor(Color.black); if (lastpoint.x != -1) { g.drawRect(lastpoint.x - drawoffset.x,lastpoint.y - drawoffset.y,fieldsize.width,fieldsize.height); } 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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javac dateiname.java |
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