我在尝试使用 JLayeredPane
制作自己的国际象棋游戏时遇到问题。
我做到了这一点:
(希望你能看到 block G6
在标签上有一个绿色边框,显示哪个 block 被选中)
但是当我将我的 2 个 SidePanel
添加到我的 ChessBoard
面板,然后在顶部有另一个层时,标签应该覆盖每个董事会完全阻止但它没有:
如您所见, block G2
周围的绿色边框已关闭。
当我将 SidePanel
添加到 ChessBoard
并将其添加到底层并将其大小设置为 600x600 然后添加顶层是将完全适合 ChessBoard
block 的标签,绿色边框绘制在选定的 JLabel
周围(以及下层 ChessBoard
square [black or white]) 由于 SidePanel
减小了棋盘的实际尺寸 600x600,因此它偏离了中心,现在它将是 600-sp1.getWidth( )
x600-sp2.getHeight()
。我尝试设置顶层的边界和首选大小来补偿它,但它似乎没有用。感谢您的帮助,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);
}
});
}
}
侧面板.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));
}
}
}
棋盘.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) {
}
}
起初我使用:
chessPieceLayer.setPreferredSize(boardSize);
chessPieceLayer.setBounds(0, 0, boardSize.width, boardSize.height);
然后我尝试:
chessPieceLayer.setPreferredSize(new Dimension(600-sp1.getWidth(),600-sp2.getHeight()));
chessPieceLayer.setBounds(0+sp1.getWidth(), 0+sp2.getHeight(), 600-sp1.getWidth(), 600-sp2.getHeight());
但结果没有什么不同
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,这样我就不必做那么多复制/粘贴操作(这会阻碍人们尝试您的代码);-)。
无论如何,问题出在您的 SidePanel 上,它占用了 ChessBoardPanel 上的空间,因此引入了偏移量。解决方案非常简单,您所要做的就是:
- 将
sp1
和sp2
添加到contentPane
- 在您的
chessBoard
和chessPieceLayer
上,只需将大小设置为 boardSize。
解释
- 我们将 SidePanel 移至内容面板,这样它们就不会干扰您的图层。当您使用 JLayeredPane 时,您使用的是所谓的绝对布局或空布局。这意味着您必须注意组件的定位和大小。这引出了第 2 点:
- 当没有 LayoutManager 时,设置 preferredSize 是没有用的,因为没有 LayoutManager 来调用该方法。现在,默认情况下组件位于 (0,0),因此您只需调用
setSize
。如果您希望它们被偏移,您还需要调用setLocation
,或者将这 2 个调用连接到对setBounds
的单个调用中
关于java - 调整 JLayeredPane 层的大小,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/12392523/