面板无法使用Java中的GridBagLayout正确调整大小

因此,我在我的GUI中使用了GridBagLayout,但是我在调​​整大小时遇到​​了一些问题.在任何人建议其他布局之前,我很确定我想使用GridBagLayout.我将拥有大量组件,并且想要正确地布局它们,当前的代码/图像仅显示到目前为止的内容.

无论如何,问题是它无法正确调整自身大小.我希望它在调整大小时保持当前具有的长宽比,但事实并非如此.某些面板在调整大小时具有某种优先权,因此当我调整大小时,它会破坏宽高比.本质上,我的某个面板比另一个面板大,但是在调整大小后,它变得比另一个面板小,如下所示：

http://i.imgur.com/LWhHm.png

现在,我真正想要的是让他们保持已经提出的比例.如您所见,我希望GUI的聊天部分小于最初的两个左面板.

下面是我现在产生此代码的代码：

jpPack = new JPanel();
    jpCards = new JPanel();
    jpInfo = new JPanel();
    jpChat = new JPanel();


    jpPack.setBackground(Color.red);
    jpCards.setBackground(Color.blue);
    jpInfo.setBackground(Color.green);

    //create the Constraints and set some that will apply to each panel
    GridBagConstraints c = new GridBagConstraints();
    c.fill = GridBagConstraints.BOTH;

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 0;
    c.gridy = 0;
    //set the weight properties
    c.weightx = 1.0;
    c.weighty = 1.0;

    getContentPane().add(jpCards, c);

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 0;
    c.gridy = 1;
    //set the weight properties
    c.weightx = 1.0;
    c.weighty = 1.0;

    getContentPane().add(jpPack, c);

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 1;
    c.gridy = 0;
    //set the weight properties
    c.weightx = 0.2;
    c.weighty = 0.2;

    getContentPane().add(jpInfo, c);

    //set the number of columns/rows to use
    c.gridwidth = 1;
    c.gridheight = 1;
    //set the x and y position
    c.gridx = 1;
    c.gridy = 1;
    //set the weight properties
    c.weightx = 0.2;
    c.weighty = 0.2;

    getContentPane().add(jpChat, c);
    jpChat.setLayout(new GridLayout());
    jpChat.add(client.gui.getContentPane(), c);

    setVisible(true);

在讨论的同时,我还可以问另一个问题.我想为整个GUI和聊天面板设置最小大小限制.首先,我希望它不允许用户将其调整为小于某个x和某个y的大小.对于后者,我希望它保持我声明的纵横比,然后在达到两个右面板的最小值后,仅调整左面板的大小.也就是说,它将调整每个面板的大小,直到达到某个大小,然后继续调整整个GUI的大小,但只是调整左侧面板的大小,使右侧面板保持最小尺寸.

谢谢你帮我这真的让我很烦,我花了几个小时尝试这样做,弄乱了GridBagLayoutConstraints却一无所获.这是我所能做到的最好的.

解决方法:

我尝试解决您的问题,但有一个简单的原因,可能会引起您的担忧.在ChatPanel中使用的JTextField初始化时,必须为其指定列,这可能会导致这种效果.自从我编写上述代码的方式以来,这件事在任何意义上都没有给我带来任何奇怪的行为.尽管关于第二个问题,@ kleopatra提供了一些见解.这是我使用的代码：

import java.awt.*;
import javax.swing.*;

public class ClientGrid
{
    private void displayGUI()
    {
        JFrame frame = new JFrame("Client Grid");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel contentPane = new JPanel();
        contentPane.setLayout(new GridBagLayout());

        JPanel bluePanel = new JPanel();
        bluePanel.setOpaque(true);
        bluePanel.setBackground(Color.BLUE);

        JPanel greenPanel = new JPanel();
        greenPanel.setOpaque(true);
        greenPanel.setBackground(Color.GREEN);

        JPanel redPanel = new JPanel();
        redPanel.setOpaque(true);
        redPanel.setBackground(Color.RED);

        JPanel chatPanel = new JPanel();
        JTextField chatField = new JTextField();
        chatPanel.setLayout(new BorderLayout(5, 5));
        chatPanel.add(chatField, BorderLayout.PAGE_START);

        GridBagConstraints gbc = new GridBagConstraints();
        gbc.anchor = GridBagConstraints.FIRST_LINE_START;
        gbc.fill = GridBagConstraints.BOTH;
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.weightx = 0.7;
        gbc.weighty = 0.3;

        contentPane.add(bluePanel, gbc);

        gbc.gridx = 1;
        gbc.weightx = 0.3;

        contentPane.add(greenPanel, gbc);

        gbc.gridx = 0;
        gbc.gridy = 1;
        gbc.weightx = 0.7;
        gbc.weighty = 0.7;

        contentPane.add(redPanel, gbc);

        gbc.gridx = 1;
        gbc.weightx = 0.3;

        contentPane.add(chatPanel, gbc);

        frame.setContentPane(contentPane);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String... args)
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            @Override
            public void run()
            {
                new ClientGrid().displayGUI();
            }
        });
    }
}

标签：gridbaglayout,swing,jpanel,java,user-interface
来源： https://codeday.me/bug/20191127/2075030.html