让 Swing 刷新 JLabel 时遇到问题(显然在事件调度线程上)

发布于 2024-08-29 18:34:01 字数 1835 浏览 7 评论 0原文

我有这个动作侦听器:

this.newGameButton.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent a) {
    MokkiGUI.this.game = newGameQuery();
    MokkiGUI.this.AI = new AIPlayer(MokkiGUI.this.game.getBoard());
    MokkiGUI.this.boardLabel.setText("");
    MokkiGUI.this.boardLabel.repaint();
    refreshScreen();
    JOptionPane.showMessageDialog(null, "Starting new game", "New game", JOptionPane.PLAIN_MESSAGE);
    if (MokkiGUI.this.game.getAIIndicator() % 2 == 1) {
      while (makeAIMove()) {
        MokkiGUI.this.refreshScreen();
      }
      MokkiGUI.this.refreshScreen();
    }
  }
});

public void refreshScreen() {
if (javax.swing.SwingUtilities.isEventDispatchThread()) {
  System.out.println("Is");
} else {
  System.out.println("Not");
}
MokkiGUI.this.boardLabel.setText(MokkiTest.printBoard(MokkiGUI.this.game.getBoard()));
MokkiGUI.this.boardLabel.repaint();
MokkiGUI.this.data.setText("X: " + MokkiGUI.this.game.getPlayer1name() + "\n Score: "
    + MokkiGUI.this.game.getPlayer1score() + "\n\n" + "O: " + MokkiGUI.this.game.getPlayer2name() + "\n Score: "
    + MokkiGUI.this.game.getPlayer2score());
MokkiGUI.this.data.repaint();
if (!MokkiGUI.this.game.redoable()) {
  MokkiGUI.this.forwardButton.setEnabled(false);
  MokkiGUI.this.allForwardButton.setEnabled(false);
} else {
  MokkiGUI.this.forwardButton.setEnabled(true);
  MokkiGUI.this.allForwardButton.setEnabled(true);
}
if (!MokkiGUI.this.game.undoable()) {
  MokkiGUI.this.backButton.setEnabled(false);
  MokkiGUI.this.allBackButton.setEnabled(false);
} else {
  MokkiGUI.this.backButton.setEnabled(true);
  MokkiGUI.this.allBackButton.setEnabled(true);
}
MokkiGUI.this.buttonPanel.repaint();

}

刷新屏幕()似乎不起作用。它们显然在事件调度程序线程上运行,并且所做的更改仅在操作侦听器执行结束时才会显示。从 MokkiGUI() 构造函数调用时它工作正常,因为它不在 EDT 上。

I have this action listener:

this.newGameButton.addActionListener(new ActionListener() {
  public void actionPerformed(ActionEvent a) {
    MokkiGUI.this.game = newGameQuery();
    MokkiGUI.this.AI = new AIPlayer(MokkiGUI.this.game.getBoard());
    MokkiGUI.this.boardLabel.setText("");
    MokkiGUI.this.boardLabel.repaint();
    refreshScreen();
    JOptionPane.showMessageDialog(null, "Starting new game", "New game", JOptionPane.PLAIN_MESSAGE);
    if (MokkiGUI.this.game.getAIIndicator() % 2 == 1) {
      while (makeAIMove()) {
        MokkiGUI.this.refreshScreen();
      }
      MokkiGUI.this.refreshScreen();
    }
  }
});

public void refreshScreen() {
if (javax.swing.SwingUtilities.isEventDispatchThread()) {
  System.out.println("Is");
} else {
  System.out.println("Not");
}
MokkiGUI.this.boardLabel.setText(MokkiTest.printBoard(MokkiGUI.this.game.getBoard()));
MokkiGUI.this.boardLabel.repaint();
MokkiGUI.this.data.setText("X: " + MokkiGUI.this.game.getPlayer1name() + "\n Score: "
    + MokkiGUI.this.game.getPlayer1score() + "\n\n" + "O: " + MokkiGUI.this.game.getPlayer2name() + "\n Score: "
    + MokkiGUI.this.game.getPlayer2score());
MokkiGUI.this.data.repaint();
if (!MokkiGUI.this.game.redoable()) {
  MokkiGUI.this.forwardButton.setEnabled(false);
  MokkiGUI.this.allForwardButton.setEnabled(false);
} else {
  MokkiGUI.this.forwardButton.setEnabled(true);
  MokkiGUI.this.allForwardButton.setEnabled(true);
}
if (!MokkiGUI.this.game.undoable()) {
  MokkiGUI.this.backButton.setEnabled(false);
  MokkiGUI.this.allBackButton.setEnabled(false);
} else {
  MokkiGUI.this.backButton.setEnabled(true);
  MokkiGUI.this.allBackButton.setEnabled(true);
}
MokkiGUI.this.buttonPanel.repaint();

}

The refreshScreen()s don't seem to work. They are apprently running on the Event Dispatcher thread and the changes made only show up when the action listener's execution is over. It works fine when called from the MokkiGUI() constructor, as it is not on the EDT.

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彩扇题诗 2024-09-05 18:34:01

您正在阻塞 EDT 线程,因此事件调度循环无法到达重绘事件。在 EDT 外部运行并使用 java.awt.EventQueue.invokeLater 与 EDT 通信,或者使用 javax.swing.Timer(而不是 java.util !) 在 EDT 上定期运行任务。

You are blocking the EDT thread, so it event dispatch loop can't get to the repaint events. Either run outside of the EDT and use java.awt.EventQueue.invokeLater to communicate with the EDT, or use javax.swing.Timer (not java.util!) to regularly run tasks on the EDT.

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