获取gridlayout上按钮的位置

2 回答

• 2

  • 永远不要在JButton上添加MouseListener用于此目的 . 请改用ActionListener .

  • 为什么不创建JButton的数组或ArrayList，然后简单地遍历列表以找到合适的数组？

  即，

  private JButton[][] buttonGrid = new JButton[ROWS][COLS];
  

  在其他地方，您需要使用可行的JButton对象填充网格，并将这些JButton放入GUI中 .

  然后在程序中使用嵌套for循环迭代网格，比较网格按钮和 getSource() JButton .

  即在JButton的ActionListener中

  public void actionPerformed(ActionEvent e) {
    for (int row = 0; row < ROWS; row++) {
      for (int col = 0; col < COLS; col++) {
         if buttonGrid[row][col] == e.getSource();
         // here you have your row and column
      }
    }
  }
  

  ---

  Edit
  你问：

  为什么？

  因为它赢得了't work correctly in many situations. ActionListeners have been built to work specifically with JButtons and JMenuItems and have mechanisms that make this function work well l and easily. For example, say you decide to have a JButton that is only enabled once the user has filled two JTextFields, and you use the JButton'方法来执行此操作，禁用JButton不会阻止MouseListener工作，但它将停止ActionListener .

  ---

  Edit 2

  例如，

  import java.awt.GridLayout;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import javax.swing.*;
  
  public class ButtonGridEg extends JPanel {
     private static final int ROWS = 8;
     private static final int COLS = ROWS;
     private static final int GAP = 5;
     private JButton[][] buttonGrid = new JButton[ROWS][COLS];
  
     public ButtonGridEg() {
        setLayout(new GridLayout(ROWS, COLS, GAP, GAP));
  
        ActionListener buttonListener = new ActionListener() {
  
           @Override
           public void actionPerformed(ActionEvent evt) {
              JButton selectedBtn = (JButton) evt.getSource();
              for (int row = 0; row < buttonGrid.length; row++) {
                 for (int col = 0; col < buttonGrid[row].length; col++) {
                    if (buttonGrid[row][col] == selectedBtn) {
                       System.out.printf("Selected row and column: %d %d%n", row, col);
                    }
                 }
              }
           }
        };
        for (int row = 0; row < buttonGrid.length; row++) {
           for (int col = 0; col < buttonGrid[row].length; col++) {
              String text = String.format("Button [%d, %d]", row, col);
              buttonGrid[row][col] = new JButton(text);
              buttonGrid[row][col].addActionListener(buttonListener);
              add(buttonGrid[row][col]);
           }
        }
     }
  
     private static void createAndShowGui() {
        ButtonGridEg mainPanel = new ButtonGridEg();
  
        JFrame frame = new JFrame("ButtonGridEg");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.getContentPane().add(mainPanel);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
     }
  
     public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
           public void run() {
              createAndShowGui();
           }
        });
     }
  }
  

  回复于 2024-05-04T02:39:21+08:00
• 3

  在这种情况下，您甚至不必搜索索引，因为您在创建按钮时知道它们：

  for (int i = 0; i < puzzle.getSize(); i++) {
      int k = puzzle.getListItem(i);
      if (k == puzzle.getEmptyFlag())
          controls.add(new JLabel(""));
      else {
          JButton jb = new JButton(String.valueOf(k));
  
          final int rowIndex = i / size;
          final int columnIndex = i % size;
  
          // Using an ActionListener, as Hovercraft Full Of Eels already told you:
          jb.addActionListener(new ActionListener() {
  
              @Override
              public void actionPerformed(ActionEvent e) {
                  System.out.println("rowIndex "+rowIndex+" columnIndex "+columnIndex);
              }
  
          });
          controls.add(jb);
      }
  }
  

  回复于 2024-05-04T02:39:21+08:00