尝试使用JLayeredPane制作自己的国际象棋游戏时遇到问题。
我得到了这么远:
(希望您能看到G6块在标签上带有绿色边框，显示选中了哪个块)
但是，当我将2个SidePanel添加到ChessBoard面板中，然后在其上有另一层带有标签的层时，该标签应准确地覆盖每个木板块，但实际上并没有:
如您所见，绿色边框G2框已关闭。
当我将SidePanel s添加到ChessBoard并将其添加到底层并设置其大小为600x600时，我将其范围缩小到很明显，然后添加顶层，这是恰好适合ChessBoard块的标签，并且在选定的JLabel周围绘制了绿色边框(以及下部的ChessBoard正方形[黑色或白色])，由于SidePanel s将棋盘的实际尺寸减小了600x600，所以绿色边框被画在了中心，现在将是600-sp1.getWidth() x 600-sp2.getHeight()。我尝试设置顶层的边界和首选大小来补偿它，但似乎没有用。任何帮助表示赞赏，谢谢:
ChessBoardTest.java:
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.HashMap;
import javax.swing.*;
import javax.swing.border.BevelBorder;
public class ChessBoardTest {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Dimension boardSize = new Dimension(600, 600);
JFrame frame = new JFrame("Chess JLayeredPane Test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setResizable(false);
Container contentPane = frame.getContentPane();
ChessBoard chessBoard = new ChessBoard();
SidePanel sp1 = new SidePanel(new String[]{"8", "7", "6", "5", "4", "3", "2", "1"}, SidePanel.VERTICAL);
SidePanel sp2 = new SidePanel(new String[]{"A", "B", "C", "D", "E", "F", "G", "H"}, SidePanel.HORIZONTAL);
//adding these 2 side panels messes up the layout
chessBoard.add(sp1, BorderLayout.WEST);
chessBoard.add(sp2, BorderLayout.SOUTH);
chessBoard.setPreferredSize(boardSize);
chessBoard.setBounds(0, 0, boardSize.width, boardSize.height);
ChessPieceLayer chessPieceLayer = new ChessPieceLayer();
//chessPieceLayer.setPreferredSize(boardSize);
//chessPieceLayer.setBounds(0, 0, boardSize.width, boardSize.height);
//i've tried resizing to make up for the side panels but no result
chessPieceLayer.setPreferredSize(new Dimension(600-sp1.getWidth(),600-sp2.getHeight()));
chessPieceLayer.setBounds(0+sp1.getWidth(), 0+sp2.getHeight(), 600-sp1.getWidth(), 600-sp2.getHeight());
JLayeredPane jLayeredPane = new JLayeredPane();
jLayeredPane.setPreferredSize(boardSize);
jLayeredPane.add(chessBoard, JLayeredPane.FRAME_CONTENT_LAYER);
jLayeredPane.add(chessPieceLayer, JLayeredPane.MODAL_LAYER);
contentPane.add(jLayeredPane);
frame.pack();
frame.setVisible(true);
}
});
}
}
SidePanel.java:
class SidePanel extends JPanel {
final static String HORIZONTAL = "horizontal";
final static String VERTICAL = "vertical";
public SidePanel(String[] strings, String direction) {
if (direction.equals(VERTICAL)) {
setLayout(new GridLayout(8, 0));
} else {
setLayout(new GridLayout(0, 8));
}
setDoubleBuffered(true);
for (String string : strings) {
this.add(new JLabel(string, JLabel.CENTER));
}
}
}
ChessBoard.java:
class ChessBoard extends JPanel {
public ChessBoard() {
super(new BorderLayout(), true);
this.add(populateBoard(Color.white, Color.black), BorderLayout.CENTER);
}
private JPanel populateBoard(Color c1, Color c2) {
JPanel panel = new JPanel(new GridLayout(8, 8));
for (int i = 0; i < 8; i++) {
for (int j = 0; j < 8; j++) {
JPanel square = new JPanel(new BorderLayout());
square.setBackground((i + j) % 2 == 0 ? c1 : c2);
panel.add(square);
}
}
return panel;
}
}
ChessPieceLayer.java:
class ChessPieceLayer extends JComponent {
private HashMap<PiecePanel, String> panelsMap = new HashMap<>(64);
final ChessPieceMouseListener listener;
ChessPieceLayer() {
super();
listener = new ChessPieceMouseListener();
setLayout(new GridLayout(8, 8));
setDoubleBuffered(true);
fillPanelsMap();
}
private void fillPanelsMap() {
String[] cols = new String[]{"A", "B", "C", "D", "E", "F", "G", "H"};
int[] rows = new int[]{1, 2, 3, 4, 5, 6, 7, 8};
String row, col;
int rowCount = 7, colCount = 0, trigger = 8;
for (int i = 0; i < 64; i++) {
if (trigger == 0) {
colCount = 0;
trigger = 8;
rowCount--;
}
col = cols[colCount++];
row = rows[rowCount] + "";
trigger--;
String location = col + row;
PiecePanel square = createAndAddPiecesWithMouseListener(location);
panelsMap.put(square, location);
}
}
private PiecePanel createAndAddPiecesWithMouseListener(String location) {
PiecePanel square = new PiecePanel(location, JLabel.CENTER);
square.addMouseListener(listener);
square.setText(location);
this.add(square);
return square;
}
}
PiecePanel.java:
class PiecePanel extends JLabel {
private String location;
public PiecePanel(String text, int horizontalAlignment) {
super("", horizontalAlignment);
this.location = text;
}
PiecePanel(String location) {
this.location = location;
}
public String getPieceLocation() {
return location;
}
public void setPieceLocation(String location) {
this.location = location;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
}
}
ChessPieceMouseListener.java:
class ChessPieceMouseListener implements MouseListener {
int counter = 0;
PiecePanel this_pp, prev_pp;
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
PiecePanel pp = (PiecePanel) e.getComponent();
if (counter == 0) {
this_pp = pp;
this_pp.setBorder(new BevelBorder(0, Color.green, Color.green));
JOptionPane.showMessageDialog(null, "From " + pp.getPieceLocation());
counter = 1;
} else {
prev_pp = this_pp;
this_pp = pp;
prev_pp.setBorder(null);
JOptionPane.showMessageDialog(null, "To " + pp.getPieceLocation());
counter = 0;
}
}
@Override
public void mouseEntered(MouseEvent e) {
}
@Override
public void mouseExited(MouseEvent e) {
}
}
起初我用过:
chessPieceLayer.setPreferredSize(boardSize);
chessPieceLayer.setBounds(0, 0, boardSize.width, boardSize.height);
然后我尝试了:
chessPieceLayer.setPreferredSize(new Dimension(600-sp1.getWidth(),600-sp2.getHeight()));
chessPieceLayer.setBounds(0+sp1.getWidth(), 0+sp2.getHeight(), 600-sp1.getWidth(), 600-sp2.getHeight());
但结果没有不同
最佳答案
好的，我找到了问题，并且有一个简单的解决方案。下次，尝试将您的代码放在一个类中，这样我就不必进行太多复制/粘贴(这种劝阻人们尝试代码的方式);-)。
无论如何，问题出在您的SidePanel上，它占用了ChessBoardPanel的空间，因此引入了偏移量。该解决方案非常简单，您所要做的就是:
sp1和sp2添加到contentPane chessBoard和chessPieceLayer上的说明
setSize即可。如果要使它们偏移，则还需要调用setLocation，或将这2个调用串联到setBounds