java - 调整 JFrame 大小时去除组件之间的额外空间

Question

我正在使用 GridBagLayout 在框架中排列一些组件。
首次创建框架时，组件之间有一个合适的空间。

但是一旦我调整框架的大小，组件之间就会有很多不需要的空间

我尝试按照一些用户的建议调整权重和插图，但似乎并没有解决问题

import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JTextArea;

public class Frame1 extends JFrame {

    JLabel one = new JLabel("one");
    JLabel two = new JLabel("two");
    JLabel three = new JLabel("three");

    JTextField oneF = new JTextField(20);
    JTextField twoF = new JTextField(20);
    JTextField threeF = new JTextField(20);

    JMenuBar menuBar = new JMenuBar();
    JMenu menu = new JMenu("menu");

    GridBagConstraints c = new GridBagConstraints();

    public Frame1() {
        setTitle("GridBagLayout Test");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLayout(new GridBagLayout());

        menuBar.add(menu);

        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = c.REMAINDER;
        c.fill = c.HORIZONTAL;
        c.gridheight = 1;
        c.weightx = 1;
        c.weighty = 1;
        c.anchor = c.NORTH;
        c.insets = new Insets(5,5,5,5);
        add(menuBar, c);

        c.gridx = 0;
        c.gridy = 1;
        c.gridwidth = 1;
        c.fill = c.NONE;
        c.gridheight = 1;
        c.weightx = 1;
        c.weighty = 1;
        c.anchor = c.NORTH;
        c.insets = new Insets(5,5,5,5);
        add(one, c);

        c.gridx = 1;
        c.gridy = 1;
        c.gridwidth = 1;
        c.fill = c.NONE;
        c.gridheight = 1;
        c.weightx = 1;
        c.weighty = 1;
        c.anchor = c.NORTH;
        c.insets = new Insets(5,5,5,5);
        add(oneF, c);

        c.gridx = 0;
        c.gridy = 2;
        c.gridwidth = 1;
        c.fill = c.NONE;
        c.gridheight = 1;
        c.weightx = 1;
        c.weighty = 1;
        c.anchor = c.NORTH;
        c.insets = new Insets(5,5,5,5);
        add(two, c);

        c.gridx = 1;
        c.gridy = 2;
        c.gridwidth = 1;
        c.fill = c.NONE;
        c.gridheight = 1;
        c.weightx = 1;
        c.weighty = 1;
        c.anchor = c.NORTH;
        c.insets = new Insets(5,5,5,5);
        add(twoF, c);

        c.gridx = 0;
        c.gridy = 3;
        c.gridwidth = 1;
        c.fill = c.NONE;
        c.gridheight = 1;
        c.weightx = 1;
        c.weighty = 1;
        c.anchor = c.NORTH;
        c.insets = new Insets(5,5,5,5);
        add(three, c);

        c.gridx = 1;
        c.gridy = 3;
        c.gridwidth = 1;
        c.fill = c.NONE;
        c.gridheight = 1;
        c.weightx = 1;
        c.weighty = 1;
        c.anchor = c.NORTH;
        c.insets = new Insets(5,5,5,5);
        add(threeF, c);

       //setResizable(false);
       pack();
       setVisible(true);
    }

}

ps:- 我是 GUI 编程的新手，所以请原谅我的任何新手错误。

编辑 1:这是我完成后想要的。我知道目前它看起来并不接近我的想法......我仍在努力

谢谢

Answer 1

• 使用嵌套布局(几个 LayoutManager 的组合)，你的图片告诉我，

• 对于放置在左侧的组件，您仍然可以使用 GridBagLayout，

• 在我的代码中(尽可能简单的想法)放置在左侧的 JComponent 不能调整大小，因为受到 LayoutManager 的默认设置的限制，更多信息请参见 Oracle tutorial

.

.

画自 SSCCE/MCVE

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class MyFrame {

    private static final long serialVersionUID = 1L;
    private JFrame myFrame = new JFrame("Whatever");
    private JPanel parentPanel = new JPanel(new BorderLayout(10, 10)) {

        private static final long serialVersionUID = 1L;

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(600, 400);
        }

        @Override
        public Color getBackground() {
            return new Color(255, 000, 000);
        }
    };
    private JPanel leftPanel = new JPanel(/*default is FlowLayout*/) {

                private static final long serialVersionUID = 1L;

                @Override
                public Dimension getPreferredSize() {
                    return new Dimension(300, 400);
                }

                @Override
                public Color getBackground() {
                    return new Color(255, 255, 000);
                }
            };
    private JPanel leftChildPanel = new JPanel() {

        private static final long serialVersionUID = 1L;

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(300, 400);
        }

        @Override
        public Color getBackground() {
            return new Color(255, 255, 225);
        }
    };
    private JPanel rightPanel = new JPanel(new BorderLayout(10, 10)) {

        private static final long serialVersionUID = 1L;

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(300, 380);
        }

        @Override
        public Color getBackground() {
            return new Color(000, 255, 225);
        }
    };

    public MyFrame() {
        parentPanel.add(leftPanel, BorderLayout.WEST);
        leftPanel.add(leftChildPanel);
        parentPanel.add(rightPanel);
        myFrame.add(parentPanel);
        myFrame.setLocation(150, 150);
        myFrame.pack();
        myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        myFrame.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(() -> {
            new MyFrame();
        });
    }
}