我正在编写一款名为“Kulami”的游戏。这是一个两个玩家的棋盘游戏。棋盘是用不同大小的矩形板构建的。我可以签署我需要的所有印版，但我无法移动它们，MouseMotionListener不起作用。矩形板已签名，但没有接触按鼠标。我找不到错误。任何人都可以在我的代码上显示并帮助我吗？ 谢谢！
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import Model.EFieldStateMarble;
import Model.EFieldStatePlate;
public class Plate extends JPanel {
// Eigenschaften
public String plate[][];
// Konstruktor
public Plate(int r, int c, EFieldStatePlate fieldStatePlate, EFieldStateMarble fieldStateMarble) {
plate = new String[r][c];
for (r = 0; r < plate.length; r++) { // waagerecht
for (c = 0; c < plate[r].length; c++) { // senkrecht
plate[r][c] = fieldStatePlate.toString() + fieldStateMarble.toString(); // Codierung Feld
}
}
}
// Methoden
public void showPlate() { // Konsolenausgabe Spielfeldplatte
for (int r = 0; r < plate.length; r++) {
for (int c = 0; c < plate[r].length; c++) {
System.out.print(plate[r][c]);
}
System.out.println();
}
}
// Ändert Eintrage in r-ter Reihe und c-ter Spalte
public void setEntryAt(int r, int c, EFieldStatePlate fieldStatePlate, EFieldStateMarble fieldStateMarble) {
plate[r][c] = fieldStatePlate.toString() + fieldStateMarble.toString();
}
public String[][] getPlate() {
return plate;
}
// dreht das Array um 90°
public void turnPlate() {
int m = plate.length;
int n = plate[0].length;
String[][] returnPlate = new String[n][m];
for (int r = 0; r < plate.length; r++) {
for (int c = 0; c < plate[0].length; c++) {
returnPlate[c][m - 1 - r] = plate[r][c];
}
}plate = returnPlate;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g;
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
drawPlate(g2d, 60, 60);
}
private void drawPlateField(Graphics2D g2d, int x, int y) {
int posX = x;
int posY = y;
g2d.setColor(Color.BLACK);
g2d.drawRect(posX, posY, 60, 60);
g2d.setColor(new Color(242, 203, 130));
g2d.fillRect(posX + 1, posY + 1, 59, 59);
g2d.setColor(Color.BLACK);
g2d.drawOval(x + 15, y + 15, 30, 30);
g2d.setColor(new Color(242, 203, 130));
g2d.fillOval(x + 16, y + 16, 29, 29);
}
private void drawPlate(Graphics g2d, int plateX, int plateY ) {
try {
for (int r = 0; r < plate.length; r++) {
for (int c = 0; c < plate[0].length; c++) {
drawPlateField((Graphics2D) g2d, plateX + c * 60, plateY + r * 60);
}
}
} catch (Exception e) {
System.out.print(e);
}
}
private class PlateDragged implements MouseListener, MouseMotionListener {
//Plattengröße
int platesizeX = plate.length;
int platesizeY = plate[0].length;
//Plattenkoordinaten
int plateX = 60;
int plateY = 60;
//Position, von der die Maus die Platte zieht
int dragFromX = 0;
int dragFromY = 0;
//bei "true" kann die Platte nach Mausklick gezogen werden
boolean candrag = false;
public void mousePressed(MouseEvent mmp) {
new Thread() {
@Override
public void run() {
int x = mmp.getX();
int y = mmp.getY();
if (x >= plateX && x <= (plateX + platesizeY) && y >= plateY && y <= (plateY + platesizeX)) {
candrag = true;
dragFromX = x - plateX;
dragFromY = y - plateY;
}
else {
candrag = false;
}
System.out.println("Hallo");
}
}.start();
}
@Override
public void mouseDragged(MouseEvent mmd) {
new Thread() {
@Override
public void run() {
if (candrag) {
//Plattenposition wechseln
plateX = mmd.getX() - dragFromX;
plateY = mmd.getY() - dragFromY;
//Entferne die Platte nicht aus dem Fenster
plateX = Math.max(plateX, 0);
plateX = Math.min(plateX, getWidth() - platesizeY);
plateY = Math.max(plateY, 0);
plateY = Math.min(plateY, getHeight() - platesizeX);
repaint();
}
}
}.start();
}
public void mouseExited(MouseEvent mme) {
candrag = false;
}
@Override
public void mouseMoved(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseClicked(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseEntered(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
// Plate plate = new Plate();
@Override
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Plate g2d = new Plate(2, 3, EFieldStatePlate.B6, EFieldStateMarble.EMPTY);
g2d.setPreferredSize(new Dimension(650, 650));
f.add(g2d);
f.pack();
f.setLocation(200, 800);
f.setVisible(true);
}
});
}
}
答案 0 :(得分：0)
您的代码中的任何位置都无法调用addMouseListener(...)或addMouseMotionListener(...)。您需要向Swing组件添加一个侦听器才能使侦听器工作 - 换句话说，侦听器必须侦听某些内容。如，
// Konstruktor
public Plate(int r, int c, EFieldStatePlate fieldStatePlate,
EFieldStateMarble fieldStateMarble) {
plate = new String[r][c];
for (r = 0; r < plate.length; r++) {
for (c = 0; c < plate[r].length; c++) {
plate[r][c] = fieldStatePlate.toString() + fieldStateMarble.toString();
}
}
// ***** added *****
PlateDragged plateDragged = new PlateDragged();
addMouseListener(plateDragged);
addMouseMotionListener(plateDragged);
}
坦率地提出这种性质的问题，关于MouseListener使用的基本问题表明你通过猜测而不是先学习本教程来编码。为了你自己，不要这样做。请查看MouseListener Tutorial。
其他问题：为什么要从Swing事件线程创建一个线程并从中调用代码？