问题：
在java中将图像链接到MouseEvent
充鑫鹏
一些背景，我正在开发Java游戏，我正在使用Netbeans来构建它，我目前有2个java文件
App.java
董事会.java
现在我可以创建和显示一个简单的棋盘与所有的棋子在正确的位置我的问题是分配任何鼠标事件到这些棋子
目前，我使用textpad编写测试代码，并且没有图像的文件夹链接，并且已经能够让鼠标事件在那里工作，因此我知道事件的代码没有问题。
但是现在我正在Netbean中编写程序清理器，鼠标事件不再起作用了
所以我觉得我没有把它们正确地连接到新的棋盘和新的棋盘上
这是netbean中的棋盘（不工作版本）
package chessgame;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import static javax.swing.WindowConstants.DISPOSE_ON_CLOSE;
public class Board extends JFrame implements MouseListener, MouseMotionListener{
JLayeredPane layeredPane;
JPanel chessBoard;
JLabel chessPiece;
int xAdjustment;
int yAdjustment;
int startX;
int startY;
int initialX;
int initialY;
JPanel panels;
JLabel pieces;
public Board() {
Dimension boardSize = new Dimension(600, 600);
// This is a Layered Pane for this application
layeredPane = new JLayeredPane();
getContentPane().add(layeredPane);
layeredPane.setPreferredSize(boardSize);
//Add a chess board to the Layered Pane
chessBoard = new JPanel();
layeredPane.add(chessBoard, JLayeredPane.DEFAULT_LAYER);
chessBoard.setLayout(new GridLayout(8, 8));
chessBoard.setPreferredSize(boardSize);
chessBoard.setBounds(0, 0, boardSize.width, boardSize.height);
for (int i = 0; i < 64; i++) {
JPanel square = new JPanel(new BorderLayout());
chessBoard.add(square);
int row = (i / 8) % 2;
if (row == 0) {
square.setBackground(i % 2 == 0 ? Color.white : Color.gray);
} else {
square.setBackground(i % 2 == 0 ? Color.gray : Color.white);
}
}
// Setting up the Initial Chess board.
//White Side
for (int i = 8; i < 16; i++) {
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhitePawn.png")));
panels = (JPanel) chessBoard.getComponent(i);
panels.add(pieces);
}
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteRook.png")));
panels = (JPanel) chessBoard.getComponent(0);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteKnight.png")));
panels = (JPanel) chessBoard.getComponent(1);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteKnight.png")));
panels = (JPanel) chessBoard.getComponent(6);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteBishup.png")));
panels = (JPanel) chessBoard.getComponent(2);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteBishup.png")));
panels = (JPanel) chessBoard.getComponent(5);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteKing.png")));
panels = (JPanel) chessBoard.getComponent(3);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteQueen.png")));
panels = (JPanel) chessBoard.getComponent(4);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/WhiteRook.png")));
panels = (JPanel) chessBoard.getComponent(7);
panels.add(pieces);
//Black Side
for (int i = 48; i < 56; i++) {
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackPawn.png")));
panels = (JPanel) chessBoard.getComponent(i);
panels.add(pieces);
}
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackRook.png")));
panels = (JPanel) chessBoard.getComponent(56);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackKnight.png")));
panels = (JPanel) chessBoard.getComponent(57);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackKnight.png")));
panels = (JPanel) chessBoard.getComponent(62);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackBishup.png")));
panels = (JPanel) chessBoard.getComponent(58);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackBishup.png")));
panels = (JPanel) chessBoard.getComponent(61);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackKing.png")));
panels = (JPanel) chessBoard.getComponent(59);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackQueen.png")));
panels = (JPanel) chessBoard.getComponent(60);
panels.add(pieces);
pieces = new JLabel(new ImageIcon(getClass().getResource("/chessgame/PieceImages/BlackRook.png")));
panels = (JPanel) chessBoard.getComponent(63);
panels.add(pieces);
}
//Mouse Events For All Piece Interactions
//This method checks if there is a piece present on a particular square.
private Boolean piecePresent(int x, int y) {
Component c = chessBoard.findComponentAt(x, y);
if (c instanceof JPanel) {
return false;
} else {
return true;
}
}
//This is a method to check if a piece is a Black piece.
private Boolean checkWhiteOponent(int newX, int newY) {
Boolean oponent;
Component c1 = chessBoard.findComponentAt(newX, newY);
JLabel awaitingPiece = (JLabel) c1;
String tmp1 = awaitingPiece.getIcon().toString();
if (((tmp1.contains("Black")))) {
oponent = true;
} else {
oponent = false;
}
return oponent;
}
/*
This method is called when we press the Mouse. So we need to find out what piece we have
selected. We may also not have selected a piece!
*/
public void mousePressed(MouseEvent e) {
chessPiece = null;
Component c = chessBoard.findComponentAt(e.getX(), e.getY());
if (c instanceof JPanel) {
return;
}
Point parentLocation = c.getParent().getLocation();
xAdjustment = parentLocation.x - e.getX();
yAdjustment = parentLocation.y - e.getY();
chessPiece = (JLabel) c;
initialX = e.getX();
initialY = e.getY();
startX = (e.getX() / 75);
startY = (e.getY() / 75);
chessPiece.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment);
chessPiece.setSize(chessPiece.getWidth(), chessPiece.getHeight());
layeredPane.add(chessPiece, JLayeredPane.DRAG_LAYER);
}
public void mouseDragged(MouseEvent me) {
if (chessPiece == null) {
return;
}
chessPiece.setLocation(me.getX() + xAdjustment, me.getY() + yAdjustment);
}
/*
This method is used when the Mouse is released...we need to make sure the move was valid before
putting the piece back on the board.
*/
public void mouseReleased(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
public void mouseMoved(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
}
这是我用textpad编写的测试代码（Working Mousevents版本）
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class ChessProject extends JFrame implements MouseListener, MouseMotionListener {
JLayeredPane layeredPane;
JPanel chessBoard;
JLabel chessPiece;
int xAdjustment;
int yAdjustment;
int startX;
int startY;
int initialX;
int initialY;
JPanel panels;
JLabel pieces;
public ChessProject(){
Dimension boardSize = new Dimension(600, 600);
// Use a Layered Pane for this application
layeredPane = new JLayeredPane();
getContentPane().add(layeredPane);
layeredPane.setPreferredSize(boardSize);
layeredPane.addMouseListener(this);
layeredPane.addMouseMotionListener(this);
//Add a chess board to the Layered Pane
chessBoard = new JPanel();
layeredPane.add(chessBoard, JLayeredPane.DEFAULT_LAYER);
chessBoard.setLayout( new GridLayout(8, 8) );
chessBoard.setPreferredSize( boardSize );
chessBoard.setBounds(0, 0, boardSize.width, boardSize.height);
for (int i = 0; i < 64; i++) {
JPanel square = new JPanel( new BorderLayout() );
chessBoard.add( square );
int row = (i / 8) % 2;
if (row == 0)
square.setBackground( i % 2 == 0 ? Color.white : Color.gray );
else
square.setBackground( i % 2 == 0 ? Color.gray : Color.white );
}
// Setting up the Initial Chess board.
for(int i=8;i < 16; i++){
pieces = new JLabel( new ImageIcon("WhitePawn.png") );
panels = (JPanel)chessBoard.getComponent(i);
panels.add(pieces);
}
pieces = new JLabel( new ImageIcon("WhiteRook.png") );
panels = (JPanel)chessBoard.getComponent(0);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("WhiteKnight.png") );
panels = (JPanel)chessBoard.getComponent(1);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("WhiteKnight.png") );
panels = (JPanel)chessBoard.getComponent(6);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("WhiteBishup.png") );
panels = (JPanel)chessBoard.getComponent(2);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("WhiteBishup.png") );
panels = (JPanel)chessBoard.getComponent(5);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("WhiteKing.png") );
panels = (JPanel)chessBoard.getComponent(3);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("WhiteQueen.png") );
panels = (JPanel)chessBoard.getComponent(4);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("WhiteRook.png") );
panels = (JPanel)chessBoard.getComponent(7);
panels.add(pieces);
for(int i=48;i < 56; i++){
pieces = new JLabel( new ImageIcon("BlackPawn.png") );
panels = (JPanel)chessBoard.getComponent(i);
panels.add(pieces);
}
pieces = new JLabel( new ImageIcon("BlackRook.png") );
panels = (JPanel)chessBoard.getComponent(56);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("BlackKnight.png") );
panels = (JPanel)chessBoard.getComponent(57);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("BlackKnight.png") );
panels = (JPanel)chessBoard.getComponent(62);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("BlackBishup.png") );
panels = (JPanel)chessBoard.getComponent(58);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("BlackBishup.png") );
panels = (JPanel)chessBoard.getComponent(61);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("BlackKing.png") );
panels = (JPanel)chessBoard.getComponent(59);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("BlackQueen.png") );
panels = (JPanel)chessBoard.getComponent(60);
panels.add(pieces);
pieces = new JLabel( new ImageIcon("BlackRook.png") );
panels = (JPanel)chessBoard.getComponent(63);
panels.add(pieces);
}
/*
This method checks if there is a piece present on a particular square.
*/
private Boolean piecePresent(int x, int y){
Component c = chessBoard.findComponentAt(x, y);
if(c instanceof JPanel){
return false;
}
else{
return true;
}
}
/*
This is a method to check if a piece is a Black piece.
*/
private Boolean checkWhiteOponent(int newX, int newY){
Boolean oponent;
Component c1 = chessBoard.findComponentAt(newX, newY);
JLabel awaitingPiece = (JLabel)c1;
String tmp1 = awaitingPiece.getIcon().toString();
if(((tmp1.contains("Black")))){
oponent = true;
}
else{
oponent = false;
}
return oponent;
}
/*
This method is called when we press the Mouse. So we need to find out what piece we have
selected. We may also not have selected a piece!
*/
public void mousePressed(MouseEvent e){
chessPiece = null;
Component c = chessBoard.findComponentAt(e.getX(), e.getY());
if (c instanceof JPanel)
return;
Point parentLocation = c.getParent().getLocation();
xAdjustment = parentLocation.x - e.getX();
yAdjustment = parentLocation.y - e.getY();
chessPiece = (JLabel)c;
initialX = e.getX();
initialY = e.getY();
startX = (e.getX()/75);
startY = (e.getY()/75);
chessPiece.setLocation(e.getX() + xAdjustment, e.getY() + yAdjustment);
chessPiece.setSize(chessPiece.getWidth(), chessPiece.getHeight());
layeredPane.add(chessPiece, JLayeredPane.DRAG_LAYER);
}
public void mouseDragged(MouseEvent me) {
if (chessPiece == null) return;
chessPiece.setLocation(me.getX() + xAdjustment, me.getY() + yAdjustment);
}
/*
This method is used when the Mouse is released...we need to make sure the move was valid before
putting the piece back on the board.
*/
public void mouseReleased(MouseEvent e) {
}
public void mouseClicked(MouseEvent e) {
}
public void mouseMoved(MouseEvent e) {
}
public void mouseEntered(MouseEvent e){
}
public void mouseExited(MouseEvent e) {
}
/*
Main method that gets the ball moving.
*/
public static void main(String[] args) {
JFrame frame = new ChessProject();
frame.setDefaultCloseOperation(DISPOSE_ON_CLOSE );
frame.pack();
frame.setResizable(true);
frame.setLocationRelativeTo( null );
frame.setVisible(true);
}
}
目前，mosueevents设置的唯一功能是允许用户在棋盘上拖动任何他们想要的棋子
希望有人能看到我在事件链接方面出了什么问题
提前感谢您能提供的任何帮助
共有1个答案
巫马承德
所以，在您的< code>ChessProject中，您做到了...
layeredPane.addMouseListener(this);
layeredPane.addMouseMotionListener(this);
但是在您的< code>Board项目中，您没有进行这样的调用。记住，如果你想被告知鼠标事件，你必须为它们注册一个监听器
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