阻止用户点击当前帧以外的其他地方的最佳方法? [英] Best way to block a user from clicking somewhere else than current frame?

问题描述

所以，我想知道，如何阻止用户退出或切换到应用程序中的另一个 JFrame?我还没有代码，但是这张图应该足够清楚了:

So, I was wondering, how to block user from exiting or switching to another JFrame in application? I don't have the code yet, but this picture should be clear enough:

那些灰色方块是 JFrame.上面有数字 2 的框架在上面，我希望它保持这种状态，直到我以编程方式关闭它.任何操作，例如点击编号为 1 的帧或尝试在编号为 2 的帧外执行任何操作，都应该导致再次关注编号为 2 的帧.

Those gray squares are JFrames. Frame with number 2 on it is on top, and I want it do stay that way until I programmatically close it. Any action like clicking on frame with number 1 or trying to do anything out of frame with number 2, should result in focusing on frame with number 2 again.

第 2 帧中的逻辑步骤是必不可少的，因此我想确保用户将填写该帧中的 from.

Step with logic in frame 2 is essential, so I want to make sure the user will fill in the from in the frame.

感谢您的宝贵时间！

推荐答案

如评论中所述，使用模态对话框将框架指定为所有者，用户将无法访问框直到对话框被关闭.

As mentioned in comments, use a modal dialog that specifies the frame as owner, and the user will not be able to access the frame until the dialog is dismissed.

import javax.swing.*;
import javax.swing.border.EmptyBorder;

public class BlockUserFromFrame {

    BlockUserFromFrame() {
        JFrame f = new JFrame("Try to access frame!");
        f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        JLabel l = new JLabel("Access frame after dialog disappears!");
        l.setBorder(new EmptyBorder(50, 100, 50, 100));
        f.add(l);
        f.pack();
        f.setLocationByPlatform(true);
        f.setVisible(true);

        // use a constructor that allows us to specify a parent and modality
        JDialog d = new JDialog(f, true);
        JLabel l1 = new JLabel("Dismiss dialog to access frame!");
        l1.setBorder(new EmptyBorder(20, 100, 10, 100));
        d.add(l1);
        d.pack();
        d.setLocationRelativeTo(f);
        d.setVisible(true);
    }

    public static void main(String[] args) {
        Runnable r = () -> {
            BlockUserFromFrame o = new BlockUserFromFrame();
        };
        SwingUtilities.invokeLater(r);
    }
}

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