我正在编写一个带有 GUI 的棋盘游戏，基本上我有一个 10x10 GridLayout JPanel。
每个网格单元都是一个方形的 JPanel（我对这些 JPanel 使用了 BorderLayout，因此边框是可见的）。
无论如何我想要它，以便当单击这些方块之一时，它会更改 boardGameGrid，它是一个导入到游戏后端 GUI 的类。说我要使用方法
boardGameGrid.setCellCross(x,y)
当位置 (x,y) 的单元格被按下时。
我不知道该怎么做，因为每个 JPanel 不包含任何有关其位置的信息。
谢谢
【问题讨论】：
标签： java swing grid jpanel mouselistener
您必须将此 JPanel 准备为 Object 并将其放入 Map 或 List，基于伟大但简单的想法的简单示例
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;
import javax.swing.border.LineBorder;
//based on @trashgod code from http://stackoverflow.com/a/7706684/714968
public class FocusingPanel extends JFrame {
private static final long serialVersionUID = 1L;
private int elements = 10;
private List<GridPanel> list = new ArrayList<GridPanel>();
private final JFrame mainFrame = new JFrame();
private final JPanel fatherPanel = new JPanel();
public FocusingPanel() {
fatherPanel.setLayout(new GridLayout(elements, elements));
for (int i = 0; i < elements * elements; i++) {
int row = i / elements;
int col = i % elements;
GridPanel gb = new GridPanel(row, col);
list.add(gb);
fatherPanel.add(gb);
}
mainFrame.setLayout(new BorderLayout(5, 5));
mainFrame.setDefaultCloseOperation(EXIT_ON_CLOSE);
mainFrame.add(fatherPanel, BorderLayout.CENTER);
mainFrame.pack();
mainFrame.setVisible(true);
}
private GridPanel getGridPanel(int r, int c) {
int index = r * elements + c;
return list.get(index);
}
private class GridPanel extends JPanel {
private int row;
private int col;
@Override
public Dimension getPreferredSize() {
return new Dimension(20, 20);
}
public GridPanel(int row, int col) {
this.row = row;
this.col = col;
this.setBackground(Color.red);
this.setBorder(new LineBorder(Color.black,1));
this.addMouseListener(new MouseListener() {
@Override
public void mouseClicked(MouseEvent e) {
int r = GridPanel.this.row;
int c = GridPanel.this.col;
GridPanel gb = FocusingPanel.this.getGridPanel(r, c);
System.out.println("r" + r + ",c" + c
+ " " + (GridPanel.this == gb)
+ " " + (GridPanel.this.equals(gb)));
}
@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
int r = GridPanel.this.row;
int c = GridPanel.this.col;
GridPanel gb = FocusingPanel.this.getGridPanel(r, c);
System.out.println("r" + r + ",c" + c
+ " " + (GridPanel.this == gb)
+ " " + (GridPanel.this.equals(gb)));
setBackground(Color.blue);
}
@Override
public void mouseExited(MouseEvent e) {
setBackground(Color.red);
}
});
}
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
FocusingPanel focusingPanel = new FocusingPanel();
}
});
}
}
【讨论】：
你为什么不简单地让每个小组都知道他的位置：
public MyPanel(int x, int y) {
this.x = x;
this.y = y;
}
并且，在鼠标监听器中：
MyPanel p = (MyPanel) event.getSource();
boardGameGrid.setCellCross(p.getX(), p.getY());
如果您不想更改 MyPanel，也可以使用 Map<MyPanel, Point>，并将每个面板的位置存储在此地图中：
MyPanel p = (MyPanel) event.getSource();
Point point = panelPositionMap.get(p);
boardGameGrid.setCellCross(p.x, p.y);
【讨论】：
您为什么不将其作为JTable 而不是JPanel，您可以为每个单元格添加一个侦听器。这样你就知道点击了哪一行哪一列
【讨论】：
每个 JPanel 都知道它的位置，您可以使用 panel.getX()/getY() 获得。好像你要求的是这样的：
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class PanelLocation extends JFrame implements MouseListener
{
private JPanel mainPanel, footerPanel;
private JPanel[] panel = new JPanel[9];
private JTextField tfield;
public PanelLocation()
{
mainPanel = new JPanel();
mainPanel.setLayout(new GridLayout(3, 3));
for (int i = 0; i < 9; i++)
{
panel[i] = new JPanel();
panel[i].addMouseListener(this);
panel[i].setBorder(BorderFactory.createLineBorder(Color.BLUE));
mainPanel.add(panel[i]);
}
footerPanel = new JPanel();
tfield = new JTextField(10);
footerPanel.add(tfield);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
add(mainPanel, BorderLayout.CENTER);
add(footerPanel, BorderLayout.PAGE_END);
pack();
setVisible(true);
}
private void getWhichButtonGotPressed(int x, int y)
{
if ((x == panel[0].getX()) && (y == panel[0].getY()))
{
panel[0].setBackground(Color.MAGENTA);
tfield.setText("You Clicked Panel : " + panel[0].getToolTipText());
}
else if ((x == panel[1].getX()) && (y == panel[1].getY()))
{
panel[1].setBackground(Color.YELLOW);
tfield.setText("You Clicked Panel : " + panel[1].getToolTipText());
}
else if ((x == panel[2].getX()) && (y == panel[2].getY()))
{
panel[2].setBackground(Color.RED);
tfield.setText("You Clicked Panel : " + panel[2].getToolTipText());
}
else if ((x == panel[3].getX()) && (y == panel[3].getY()))
{
panel[3].setBackground(Color.DARK_GRAY);
tfield.setText("You Clicked Panel : " + panel[3].getToolTipText());
}
else if ((x == panel[4].getX()) && (y == panel[4].getY()))
{
panel[4].setBackground(Color.ORANGE);
tfield.setText("You Clicked Panel : " + panel[4].getToolTipText());
}
else if ((x == panel[5].getX()) && (y == panel[5].getY()))
{
panel[5].setBackground(Color.PINK);
tfield.setText("You Clicked Panel : " + panel[5].getToolTipText());
}
else if ((x == panel[6].getX()) && (y == panel[6].getY()))
{
panel[6].setBackground(Color.BLUE);
tfield.setText("You Clicked Panel : " + panel[6].getToolTipText());
}
else if ((x == panel[7].getX()) && (y == panel[7].getY()))
{
panel[7].setBackground(Color.CYAN);
tfield.setText("You Clicked Panel : " + panel[7].getToolTipText());
}
else if ((x == panel[8].getX()) && (y == panel[8].getY()))
{
panel[8].setBackground(Color.GRAY);
tfield.setText("You Clicked Panel : " + panel[8].getToolTipText());
}
}
public void mouseClicked(MouseEvent ae)
{
JPanel panel = (JPanel) ae.getSource();
getWhichButtonGotPressed(panel.getX(), panel.getY());
}
public void mousePressed(MouseEvent ae)
{
}
public void mouseReleased(MouseEvent ae)
{
}
public void mouseEntered(MouseEvent ae)
{
}
public void mouseExited(MouseEvent ae)
{
}
public static void main(String[] args)
{
SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
new PanelLocation();
}
});
}
}
显示点击面板坐标的示例程序。您只需单击面板，坐标将传递给函数，该函数将检查单击了哪个面板，并返回所述面板的 toopTipText。
这是程序的输出：
希望这可能会有所帮助。
问候
【讨论】：
您可以使用二维数组来存储对面板的引用。
例子：
JPanel[][] panels = new JPanel[10][10];
//to store a panel:
JPanel p = new JPanel();
panels[x][y] = p;
//then change your method so that it gets the panel at position (x,y) from the array
public void setCellCross(int x, int y){
JPanel clickedPanel = panels[x][y];
}
【讨论】：