java - 防止从退出按钮关闭 JDialog

Question

我在 google 和 stackoverflow 上搜索了很多，它们都表明使用:

d.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);

会阻止退出按钮关闭对话框，截至目前，它不是......下面贴出相关的代码片段，似乎有问题:

if (gameArea.hitChest()) {
    JDialog d = new JDialog((JFrame) gameArea.getTopLevelAncestor(), "Dialogue", true);
    ChestLoot ch = new ChestLoot(player);
    d.add(ch);
    d.setSize(200, 100);
    d.setVisible(true);
    d.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);

    d.addWindowListener(new WindowAdapter() {

        public void windowClosing(WindowEvent we) {
            System.out.println("Don't Close!");
        }

    });

    System.out.println("Should dispose here");
    TileIcon ches = gameArea.getCurrChest();
    gameArea.removeChest(ches);
}

Answer 1

您的 JDialog 是模式对话框，因此 setVisible(true) 之后的所有内容都不会影响它。将相关代码移到setVisible(true)之前:

if (gameArea.hitChest()) {
    JDialog d = new JDialog((JFrame) gameArea.getTopLevelAncestor(), "Dialogue", true);
    ChestLoot ch = new ChestLoot(player);
    d.add(ch);
    d.setSize(200, 100);

    d.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);

    d.addWindowListener(new WindowAdapter() {

        public void windowClosing(WindowEvent we) {
            System.out.println("Don't Close!");
        }

    });

    d.setVisible(true); //code pauses here and waits for the dialog to be handled

    System.out.println("Should dispose here");
    TileIcon ches = gameArea.getCurrChest();
    gameArea.removeChest(ches);
}

当您完成所有选项的设置后，只将对话框设置为可见是一个好习惯，即使是非模态对话框也是如此。

参见 JDialog ，它是这样说的:

dialog blocks user input to other top-level windows when shown

在 An Overview of Dialogs 中也提到了.