更改浏览器选项卡时,从Applet打开的模型对话框放在Applet后面

时间:2012-09-28 07:30:16

标签: java linux firefox applet modal-dialog

applet包含以下代码:

public class TestApplet extends Applet {
public TestApplet() {
    EventQueue.invokeLater(new Runnable() {
        @Override
        public void run() {
            JDialog dialog = new JDialog();
            dialog.setContentPane(new JLabel("Hello"));
            dialog.setSize(new Dimension(300, 200));
            dialog.setModal(true);
            dialog.setVisible(true);
        }
    });
}}

当我在Windows 7上运行的InternetExplorer上打开它时,它可以工作:我更改浏览器选项卡,对话框始终保持在前面。

当我在运行于Red Hat Enterprise Linux Server版本6.3,Java 1.7.0_07-b10的Firefox ESR 10.0.5上打开它时,它立即进入浏览器窗口,我必须最小化浏览器以便再次找到它。

我需要做些什么才能使模态对话框始终位于Applet前面?

更新

将JDialog的创建更改为

JDialog dialog = new JDialog(javax.swing.SwingUtilities.getWindowAncestor(TestApplet.this));

没有区别。

1 个答案:

答案 0 :(得分:1)

最后,在尝试了很多事情后,我想出了以下解决方法:

public class ModalDialog extends JDialog {

    private boolean isClosing = false;

    protected synchronized boolean isClosing() {
        return isClosing;
    }


    protected synchronized void setClosing(boolean isClosing) {
        this.isClosing = isClosing;
    }

    public ModalDialog() {
        setSize(200, 300);
        setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);

        addFocusListener(new FocusAdapter() {
            public void focusLost(FocusEvent arg0) {
                if (isClosing()) {
                    System.out.println("Returned because dialog is already closing");
                    return;
                }
                EventQueue.invokeLater(new Runnable() {
                    public void run() {
                        ModalDialog.this.setVisible(false);
                        ModalDialog.this.setVisible(true);
                    }
                });
            }
        });
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.out.println("Dialog is closing");
                setClosing(true);

            }
        });
    }
}