GridBagLayout的困难

Question

我想布局组件，如图所示，只使用GridBagLayout。

我已经尝试了几个约束，但始终没有得到预期的结果，所以我开始怀疑是否真的可以只使用GridBagLayout。困难在于C1、C2和C3组件。

C1和C2是JComponent，它们将在内部包含其他组件，如JPanel。我已经设置了他们的最小和首选大小。C3是一个JButton。

C1不应该占用额外的空间，所以我将它的权重x设置为0，将网格宽度设置为1(也尝试了2，因为它在C2和C3上跨越)。

C2占用了所有额外的空间，我将它的权重x设置为1，网格宽度设置为3。

GUI不可调整大小。

这个LayoutManager我已经用过好几次了，但还是不太精通，谢谢你的帮助。

​

​

Answer 1

• 我只讨论GridBagLayout，甚至这可能是MigLayout的工作(MigLayout有额外的参数用于填充列数和行数，调整大小，例如)，和/或TableLayout(???)只需要在第一行中填充所有所需的列数(只)，然后创建矩阵，您可以定义任何GBC weightx, weighty, gridx, gridy和/或Anchor
• 示例谈论<代码>H212<代码>F213

​

​

import java.awt.Color;
import java.awt.ComponentOrientation;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;

public class GbcLayout {

    private JFrame frame = new JFrame("GbcLayoutGbcLayout");
    private JPanel panel = new JPanel();
    private JLabel hidelLabel;
    private JLabel firstLabel;
    private JTextField firstText;

    public GbcLayout() {
        panel.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        panel.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
        for (int k = 0; k < 50; k++) {
            hidelLabel = new JLabel("     ");
            hidelLabel.setOpaque(true);
            hidelLabel.setBackground(Color.orange);
            hidelLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
            gbc.fill = GridBagConstraints.HORIZONTAL;
            gbc.weightx = 0.5;
            gbc.weighty = 0.5;
            gbc.gridx = k;
            gbc.gridy = 0;
            panel.add(hidelLabel, gbc);
        }
        for (int k = 0; k < 5; k++) {
            firstLabel = new JLabel("Testing Label : ", SwingConstants.RIGHT);
            firstLabel.setFont(new Font("Serif", Font.BOLD, 20));
            firstLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
            gbc.fill = GridBagConstraints.HORIZONTAL;
            gbc.insets = new Insets(0, 0, 5, 0);
            gbc.gridx = 0;
            gbc.gridwidth = 8;
            gbc.gridy = k + 1;
            panel.add(firstLabel, gbc);
        }
        for (int k = 0; k < 5; k++) {
            firstText = new JTextField("Testing TextField");
            firstText.setFont(new Font("Serif", Font.BOLD, 20));
            firstText.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
            gbc.fill = GridBagConstraints.HORIZONTAL;
            gbc.insets = new Insets(0, 0, 5, 0);
            gbc.gridx = 9;
            gbc.gridwidth = k + 8;
            gbc.gridy = k + 1;
            panel.add(firstText, gbc);
        }
        for (int k = 0; k < 5; k++) {
            firstLabel = new JLabel("Testing Label : ", SwingConstants.RIGHT);
            firstLabel.setFont(new Font("Serif", Font.BOLD, 20));
            firstLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
            gbc.fill = GridBagConstraints.HORIZONTAL;
            gbc.insets = new Insets(0, 0, 5, 0);
            gbc.gridx = 20 + k;
            gbc.gridwidth = 8;
            gbc.gridy = k + 1;
            panel.add(firstLabel, gbc);
        }
        for (int k = 0; k < 5; k++) {
            firstText = new JTextField("Testing TextField");
            firstText.setFont(new Font("Serif", Font.BOLD, 20));
            firstText.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
            gbc.fill = GridBagConstraints.HORIZONTAL;
            gbc.insets = new Insets(0, 0, 5, 0);
            gbc.gridx = 29 + k;
            gbc.gridwidth = 21 - k;
            gbc.gridy = k + 1;
            panel.add(firstText, gbc);
        }
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(panel);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                GbcLayout gbcl = new GbcLayout();
            }
        });
    }
}

Answer 2

恐怕这是不可能的。GridBagLayout无法计算出C1的起始位置和C3的起始位置之间的适当距离。