Question

这是我的第一个问题，所以请耐心等待:) 我正在研究GUI的动态部分，并且由于某种原因它取笑我。登录后，该课程将在新窗口中打开。我想要的是，每次点击“添加播放器”按钮时，都会构建一个新的JPanel并添加到“容器”中。它应该把它们放在彼此之下，但它只是在第一次点击时添加一个按钮，之后其余的点击什么都不做。

感谢任何帮助：）

package Gui;

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.JButton;
import javax.swing.JFrame;
//import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

@SuppressWarnings("serial")
public class TeamManagerGUI extends JFrame implements ActionListener
{
//  private JLabel pNameLabel = new JLabel("Player Name: "),
//                  pSchoolLabel = new JLabel("School: ");
//  private JTextField pNameField = new JTextField(),
//                      pSchoolField = new JTextField();
    private JButton addButton = new JButton("Add Player"),
                    removeButton = new JButton("Remove player");
    private JPanel container = new JPanel(),
                    playerContainer = new JPanel();


    int frameCounter = 1;

    public TeamManagerGUI()
    {
        super("Team Manager User Interface");
        setSize(1200,800);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        container.setLayout(new GridBagLayout());
        playerContainer.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();

        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.insets = new Insets(3,3,3,3);
        addButton.addActionListener(this);
        container.add(addButton,gbc);

        gbc.gridx = 1;
        gbc.gridy = 0;
        gbc.insets = new Insets(3,3,3,3);
        container.add(removeButton,gbc);

        this.add(container);
    }

    public void playerFrame()
    {
        GridBagConstraints gbc = new GridBagConstraints();

        playerFrameArr.add(new JPanel());

        gbc.gridx = 0;
        gbc.gridy = 0;
        playerContainer.add(new JButton("LABEL"),gbc);

        gbc.gridx = 1;
        gbc.gridy = 0;
        playerContainer.add(new JButton("BUTTON"),gbc);

        gbc.gridx = 0;
        gbc.gridy = frameCounter+1;
        container.add(playerContainer,gbc);

        System.out.println(frameCounter);

        frameCounter++;
    }

    public void addPlayerRow()
    {
        playerFrame();
        container.revalidate();
        container.repaint();
    }

    public void removePlayerRow()
    {
        //Not yet implemented
    }

    public void actionPerformed(ActionEvent ae)
    {
        if(ae.getSource() == addButton)
        {
            addPlayerRow();
        }
        if(ae.getSource() == removeButton)
        {
            //Not yet implemented
        }
    }
}

Answer 1

您正在反复添加playerContainer。我认为你应该使用新创建的JPanel。应该填充这个并将其添加到主容器中。

多次添加单个面板将无法正确渲染，因为这会搞砸布局。我认为您需要保留对新JPanel的引用，并使用您的布局和按钮填充此内容。

我在想这样的事情：

public void playerFrame()
{
    GridBagConstraints gbc = new GridBagConstraints();

    JPanel newPanel = new JPanel(new GridBagLayout());
    playerFrameArr.add(newPanel);

    gbc.gridx = 0;
    gbc.gridy = 0;
    newPanel.add(new JButton("LABEL"), gbc);

    gbc.gridx = 1;
    gbc.gridy = 0;
    newPanel.add(new JButton("BUTTON"), gbc);

    gbc.gridx = 0;
    gbc.gridy = frameCounter + 1;
    container.add(newPanel, gbc);

    System.out.println(frameCounter);

    frameCounter++;
}

将JPanel动态添加到JFrame

1 个答案: