java - GridBagLayout 不应用网格更改

Question

我正在尝试创建一个个人 DnD 角色表程序。主要思想是有 4 个大面板，每个面板包含基本字符表的主要部分之一。我目前正在制作第一个包含统计数据和保存掷骰的面板。我在制作这个时试图更熟悉 GridBagLayout，但我遇到了设置 gridy 的问题。我已经访问过 GridBagLayout 不遵守 gridx 和 gridy 并且(除非我只是愚蠢)，这对我没有帮助。我将 GridBagLayout 与 GridBagConstraints 用于 statsPanel() 并且 gridy 工作得很好。

问题是:每当我在 ProficinciesAndSkillsPanel() 中将 gridy 设置为下一个网格时，它就会被视为我刚刚更改了 gridx。我的目标是一列多行，而不是一行多列。感谢您的宝贵时间

//this builds the jframe and sets the primary jpanel
private void buildComponents()
{
    setSize(800, 600);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JPanel mp = (JPanel)getContentPane();
    mp.setLayout(new GridBagLayout());
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.fill = GridBagConstraints.BOTH;

    gbc.anchor = GridBagConstraints.NORTHWEST;
    gbc.weightx = 1.0;
    gbc.weighty = 1.0;
    gbc.gridheight = 1;
    gbc.gridwidth = 1;
    gbc.gridx = 0;
    gbc.gridy = 0;

    mp.add(panelA(), gbc);



    gbc.gridx = 1;

    mp.add(new JButton("test"), gbc);

    createMenuBar();
    setVisible(true);
}

//this creates the first real panel that i'm currently working with
private JPanel panelA()
{
    JPanel result = new JPanel();
    result.setLayout(new GridBagLayout());
    GridBagConstraints gbc = new GridBagConstraints();

    gbc.anchor = GridBagConstraints.NORTHWEST;
    gbc.fill = GridBagConstraints.BOTH;

    gbc.gridx = 0;
    gbc.gridy = 0;

//I left out the code for statsPanel() because that works fine
    result.add(statsPanel(), gbc);

    gbc.gridx = 1;

    result.add(proficinciesAndSkillsPanel(), gbc);

    return result;
}

//this builds the second half of the upper portion of panel A
private JPanel proficinciesAndSkillsPanel()
{
    JPanel result = new JPanel();
    GridBagConstraints gbc = new GridBagConstraints();

    gbc.gridx = 0;
    gbc.gridy = 0;
    gbc.fill = GridBagConstraints.BOTH;
    gbc.anchor = GridBagConstraints.NORTHWEST;
    gbc.weightx = 1;
    gbc.weighty = 1;

    result.add(labeledTextField("Inspiration", inspirationField = new JTextField(2), null, 1), gbc);

    gbc.gridx = 0;
    gbc.gridy = 1;

    result.add(labeledTextField("Proficiency bonus", proficiencyField = new JTextField(2), null, 1),gbc);

    gbc.gridx = 0;
    gbc.gridy = 2;

    result.add(labeledRadioField("Strength", strSTField = new JTextField(2), strRB = new JRadioButton()),gbc);

    return result;
}

//this creates a JTextField with the appropriate label and a sub-JTextField
private JPanel labeledTextField(String str, JTextField jtf, JTextField bonjtf, int space)
{
    JPanel result = new JPanel();
    JPanel subResult = new JPanel();
    result.setLayout(new FlowLayout());
    result.add(new JLabel(str));
    result.add(Box.createHorizontalStrut(space));
    subResult.add(jtf);
    jtf.setHorizontalAlignment(JTextField.CENTER);
    try
    {
        subResult.add(bonjtf);
        bonjtf.setHorizontalAlignment(JTextField.CENTER);
        bonjtf.setEditable(false);
        bonjtf.setText("+0");
    }catch(NullPointerException e){}
    jtf.addKeyListener(new JTF_Listener(){
        public void update() {
            String str2 = "";
            try
            {
                int result = (Integer.parseInt(jtf.getText())-10)/2;
                if(result >=0)
                {
                    str2 += "+"+Integer.toString(result);
                }
                else
                {
                    str2 += Integer.toString(result);
                }
            }catch(NumberFormatException nfe){}
            bonjtf.setText(str2);
        }
    });
    result.add(subResult);
    return result;
}

//this does the same as labeledTextField, just with a radioButton
private JPanel labeledRadioField(String str, JTextField jtf, JRadioButton jrb)
{
    JPanel result = new JPanel();
    result.setLayout(new FlowLayout());
    result.add(jrb);
    result.add(jtf);
    result.add(new JLabel(str));
    jtf.setHorizontalAlignment(JTextField.CENTER);
    jtf.setText("+0");
    jtf.addKeyListener(new JTF_Listener(){
        public void update(){
            String str2 = "";
            try
            {
                int result = Integer.parseInt(jtf.getText());
                str2+= "+" + Integer.toString(result);
            }catch(NumberFormatException nfe){}
            jtf.setText(str2);
        }
    });

    return result;
}

Answer 1

不确定这是否是您的问题，因为您尚未发布有效的 MCVE (请更正!)，但是这里:

private JPanel proficinciesAndSkillsPanel()
{
    JPanel result = new JPanel();  // ******** here *********
    GridBagConstraints gbc = new GridBagConstraints();

    gbc.gridx = 0;
    gbc.gridy = 0;
    gbc.fill = GridBagConstraints.BOTH;
    gbc.anchor = GridBagConstraints.NORTHWEST;
    gbc.weightx = 1;
    gbc.weighty = 1;

    result.add(labeledTextField("Inspiration", inspirationField = new JTextField(2), null, 1), gbc);

    gbc.gridx = 0;
    gbc.gridy = 1;

    result.add(labeledTextField("Proficiency bonus", proficiencyField = new JTextField(2), null, 1),gbc);

    gbc.gridx = 0;
    gbc.gridy = 2;

    result.add(labeledRadioField("Strength", strSTField = new JTextField(2), strRB = new JRadioButton()),gbc);

    return result;
}

您将此结果 JPanel 视为使用 GridBagLayout，但实际上并非如此，它使用 JPanel 的默认 FlowLayout

一个令人困惑的地方:您有许多 JPanel 变量具有相同的名称 result。在您的代码中，您实际上确实调用了 result.setLayout(new GridBagLayout())，但不是针对我上面显示的 JPanel，这可能会让您感到困惑。我建议您避免在代码中使用相同的变量名称，以避免这种混淆。

如果您需要更具体的帮助，那么首先请告诉我们更多详细信息，并向我们显示您的相关代码作为有效的 minimal example program or MCVE 。如果您站在我们的角度，并试图理解其他人令人困惑的代码，那么如果他们付出努力使该代码对我们来说可编译和可运行，就会产生巨大差异。