Question

我有一个JFrame，我在其中创建和删除外部类的面板，问题是，当我来回移动时（多次删除和创建面板，我不希望引用所有面板，所有数据都是应传递（frame和boolean [即将实现]）将在构造函数中）它将整个内容向下移动。

我正在使用GridBagLayout，也许这有一些隐藏的问题。我不想使用CardLayout，所以请不要推荐它。

为什么会这样做，我应该怎么做才能阻止它呢？

代码

deleteContract = new JButton("Usuń kontrakt");
        deleteContract.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {

                ACDeleteContract ACDeleteContract = new ACDeleteContract(frame);
                removeAll();
            add(ACDeleteContract);
            revalidate();
            repaint();
        }
    });
    deleteContract.setPreferredSize(new Dimension(200, 50));
    c.gridy = 2;
    menu.add(deleteContract, c);

    back = new JButton("Powrót");
    back.addActionListener(new ActionListener() {
       public void actionPerformed(ActionEvent e) {
           ACMenu menu = new ACMenu(frame);
           removeAll();
           add(menu);
           revalidate();
           repaint();
       } 
    });

Answer 1

嗯，Andrew Thompson引导我走上了我不想早点采取的良好道路。

为后代提供几点提示：D。

在您的框架中执行

CardLayout cards = new CardLayout();
    JPanel cardPanel = new JPanel();
    cardPanel.setLayout(cards);

    ACReadContract ACReadContract = new ACReadContract(cards, cardPanel);
    //your external JPanel classes with arguments such as above
    ACMenu ACMenu = new ACMenu(cards, cardPanel);

    cardPanel.add(ACMenu, "Menu");
    cardPanel.add(ACReadContract, "ReadContract");
    //naming and adding them for easy moving between them

    //adding this to frame
    add(cardPanel);

在外部类中（构造函数的开头，类应该扩展JPanel）

private JPanel menu, cardPanel1;
private CardLayout cardLayout1;

public ACMenu(CardLayout cardLayout, JPanel cardPanel) {

    cardLayout1=cardLayout;
    cardPanel1 = cardPanel;

在外部类的动作侦听器中

cardLayout1.next(cardPanel1);

或

cardLayout1.show(cardPanel1, "ReadContract");

我希望我能帮助那些有类似问题的人。

JFrame，删除并创建了JPanel

1 个答案: