使 Java Swing 模态对话框的行为类似于 Mac OSX 对话框

我正在编写一个小型应用程序，它需要 ProgressBar 显示在框架的 TitleBar 下方，这在 Mac OSX 应用程序中很常见.我有两个问题:

1.我已经管理了定位，但我不得不硬编码父 Frame 的 TitleBar 高度.是否有一种软"方法来获取 TitleBar 的高度?

在Dialog的构造函数中:

 维度 dimensionParentFrame = parent.getSize();维度 dimensionDialog = getSize();int x = parent.getX() + ((dimensionParentFrame.width - dimensionDialog.width)/2);setLocation(x, parent.getY() + 22);//TODO 硬代码警告标题高度

2.即使对话框是模态的，我仍然可以单击父框架并移动它.如何使对话框粘"到父框架?也就是说，当父 Frame 移动时，Dialog 会随之移动，就好像附加了一样.

任何帮助/指针将不胜感激.

代码如下:

<代码>导入 javax.swing.JFrame；导入 javax.swing.JButton；导入 java.awt.BorderLayout；导入 java.awt.EventQueue；导入 java.awt.event.ActionListener；导入 java.awt.event.ActionEvent；公共类 ModalDialogDemoFrame 扩展了 JFrame{ModalDialogDemoFrame modalDialogDemo;公共 ModalDialogDemoFrame(){modalDialogDemo = 这个；setBounds(100, 100, 400, 400);设置默认关闭操作(JFrame.EXIT_ON_CLOSE)；JButton buttonDialog = new JButton("打开对话框");buttonDialog.addActionListener(new ActionListener(){公共无效actionPerformed(ActionEvent arg0){//创建一个以此框架为父的模态对话框.ModalDialog modalDialog = new ModalDialog(modalDialogDemo, true);modalDialog.setVisible(true);}});getContentPane().add(buttonDialog, BorderLayout.CENTER);}/*** @param 参数*/公共静态无效主要(字符串 [] 参数){EventQueue.invokeLater(new Runnable(){公共无效运行(){尝试{ModalDialogDemoFrame window = new ModalDialogDemoFrame();window.setVisible(true);}捕获(异常 e){e.printStackTrace();}}});}}导入 java.awt.Dimension；导入 javax.swing.JDialog；导入 javax.swing.JFrame；导入 javax.swing.JButton；导入 java.awt.BorderLayout；导入 java.awt.event.ActionListener；导入 java.awt.event.ActionEvent；公共类 ModalDialog 扩展了 JDialog{公共模态对话框(JFrame 父级，布尔模态){超级(父，模态)；维度 dimensionParentFrame = parent.getSize();setSize(new Dimension((parent == null) ? 300 : dimensionParentFrame.width/2, 75));维度 dimensionDialog = getSize();int x = parent.getX() + ((dimensionParentFrame.width - dimensionDialog.width)/2);setLocation(x, parent.getY() + parent.getInsets().top);设置未装饰(真)；设置模态(模态)；setModalityType(ModalityType.APPLICATION_MODAL);设置默认关闭操作(DISPOSE_ON_CLOSE)；JButton buttonClose = new JButton("关闭");buttonClose.addActionListener(new ActionListener(){公共无效actionPerformed(ActionEvent e){处置()；}});getContentPane().add(buttonClose, BorderLayout.CENTER);}}

解决方案

int titleBarHeight = frame.getInsets().top;

<块引用>

即使对话框是模态的，我仍然可以单击父框架并移动它.

那么你做错了，因为这不应该发生.

发布您的 SSCCE 来证明问题.

I am writing a small app that requires a ProgressBar to appear centred under the frame's TitleBar as is often seen in Mac OSX apps. I have two problems:

1. I have managed the positioning but I had to hard code the parent Frame's TitleBar height. Is there a 'soft' way to get the TitleBar's height?

In the Dialog's constructor:

 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. Even though the Dialog is modal, I can still click on the parent Frame and move it. How can I make the Dialog 'stick' to the parent Frame? That is, when the parent Frame is moved the Dialog moves with it as if attached.

Any help/pointers would be much appreciated.

Here is the code:

    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);
      }

    }

解决方案

int titleBarHeight = frame.getInsets().top;

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

Then you are doing something wrong because this should NOT happen.

Post your SSCCE that demonstrates the problem.