我正在编写一个小型应用程序,它要求ProgressBar出现在框架的TitleBar的*,这在Mac OSX应用程序中很常见.我有两个问题：

1.我已经完成了定位,但是必须对父框架的TitleBar高度进行硬编码.有没有一种“软”的方法来获取TitleBar的高度？

在对话框的构造函数中：

 Dimension dimensionParentFrame = parent.getSize();
 Dimension dimensionDialog = getSize();
 int x = parent.getX() + ((dimensionParentFrame.width - dimensionDialog.width)/2);
 setLocation(x, parent.getY() + 22);              // TODO HARD CODE WARNING TITLE HEIGHT

2.即使对话框是模式对话框,我仍然可以单击父框架并将其移动.如何使对话框“贴”到父框架？也就是说,当父框架移动时,对话框也随之移动,就好像附加了该对话框一样.

任何帮助/指针将不胜感激.

这是代码：

    import javax.swing.JFrame;
    import javax.swing.JButton;
    import java.awt.BorderLayout;
    import java.awt.EventQueue;
    import java.awt.event.ActionListener;
    import java.awt.event.ActionEvent;


    public class ModalDialogDemoFrame extends JFrame
    {
      ModalDialogDemoFrame modalDialogDemo;
      public ModalDialogDemoFrame() 
      {
        modalDialogDemo = this;
        setBounds(100, 100, 400, 400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JButton buttonDialog = new JButton("Open Dialog");
        buttonDialog.addActionListener(new ActionListener() 
        {
          public void actionPerformed(ActionEvent arg0) 
          {
            // Create a Modal Dialog with this Frame as Parent.
            ModalDialog modalDialog = new ModalDialog(modalDialogDemo, true);
            modalDialog.setVisible(true);
          }
        });
        getContentPane().add(buttonDialog, BorderLayout.CENTER);
      }

      /**
       * @param args
       */
      public static void main(String[] args)
      {
        EventQueue.invokeLater(new Runnable()
        {
          public void run()
          {
            try
            {
              ModalDialogDemoFrame window = new ModalDialogDemoFrame();
              window.setVisible(true);
            }
            catch (Exception e)
            {
              e.printStackTrace();
            }
          }
        });
      }

    }

    import java.awt.Dimension;

    import javax.swing.JDialog;
    import javax.swing.JFrame;
    import javax.swing.JButton;
    import java.awt.BorderLayout;
    import java.awt.event.ActionListener;
    import java.awt.event.ActionEvent;


    public class ModalDialog extends JDialog
    {
      public ModalDialog(JFrame parent, boolean modal) 
      {
        super(parent, modal);
        Dimension dimensionParentFrame = parent.getSize();
        setSize(new Dimension((parent == null) ? 300 : dimensionParentFrame.width / 2, 75));
        Dimension dimensionDialog = getSize();
        int x = parent.getX() + ((dimensionParentFrame.width - dimensionDialog.width)/2);
        setLocation(x, parent.getY() + parent.getInsets().top);
        setUndecorated(true);
        setModal(modal);
        setModalityType(ModalityType.APPLICATION_MODAL);
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);

        JButton buttonClose = new JButton("Close");
        buttonClose.addActionListener(new ActionListener() 
        {
          public void actionPerformed(ActionEvent e) 
          {
            dispose();
          }
        });
        getContentPane().add(buttonClose, BorderLayout.CENTER);
      }

    }

解决方法:

int titleBarHeight = frame.getInsets().top;

Even though the Dialog is modal, I can still click on the parent Frame and move it.

然后您在做错事,因为这不应该发生.

发布您的SSCCE来演示此问题.