調整JFrame大小時，消除組件之間的額外空間

Question

我正在使用GridBagLayout來安排框架中的一些組件。
首次創建框架時，組件之間具有相當大的空間。

但是一旦我調整框架大小，組件之間就會有很多不需要的空間

我嘗試按照一些用戶的建議調整權重和插入，但它似乎沒有解決問題

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編程的新手，所以請原諒我任何noob錯誤。

編輯1：這就是我完成后想要擁有的東西。 我知道目前它看起來並不像我想的那樣......我還在努力

謝謝

Answer 1

• 使用嵌套布局（幾個LayoutManager的組合），你的圖片談到我，

• 你還可以將GridBagLayout用於放置在左側的組件，

• 在我的代碼中（盡可能最簡單的想法）放在左側的JComponent不能調整大小，因為受限於LayoutManager的默認值，更多在Oracle教程中

。

。

從SSCCE / MCVE繪制

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();
        });
    }
}

Answer 2

我不知道它應該是什么樣子，但你可以嘗試為c.anchor=GridBagConstraints.EAST設置標簽c.anchor=GridBagConstraints.EAST和c.anchor=GridBagConstraints.WEST 。

還可以嘗試設置c.fill = GridBadConstraints.BOTH 。

Answer 3

我們的想法是添加空行/列，以增加可用空間：

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JTextField;

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");

    public Frame1() {

        setTitle("GridBagLayout Test");
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        GridBagLayout gridBagLayout = new GridBagLayout();
        gridBagLayout.rowHeights = new int[]{0, 0, 0, 0}; //this defines 4 rows
        //make 2 last empty row grow 
        gridBagLayout.rowWeights = new double[]{0.0, 0.0, 1.0,1.0};

        //do the same for columns 
        gridBagLayout.columnWidths = new int[]{0, 0, 0, 0};
        gridBagLayout.columnWeights = new double[]{0.0, 0.0, 1.0,1.0};

        getContentPane().setLayout(gridBagLayout);

        menuBar.add(menu);

        GridBagConstraints c = new GridBagConstraints();
        c.gridx = 0;
        c.gridy = 0;
        c.gridwidth = 5;
        c.fill = c.HORIZONTAL;
        c.anchor = c.NORTH;
        c.insets = new Insets(5, 5, 5, 0);
        getContentPane().add(menuBar, c);

        //better have a new GridBagConstraints for each component added 
        GridBagConstraints c1 = new GridBagConstraints();
        c1.gridx = 0;
        c1.gridy = 1;
        c1.gridwidth = 1;
        c1.fill = c1.NONE;
        c1.anchor = c1.NORTH;
        c1.insets = new Insets(5, 5, 0, 5);
        getContentPane().add(one, c1);

        GridBagConstraints c2 = new GridBagConstraints();
        c2.gridx = 1;
        c2.gridy = 1;
        c2.fill = c2.NONE;
        c2.anchor = GridBagConstraints.NORTHWEST;
        c2.insets = new Insets(5, 5, 0, 5);
        getContentPane().add(oneF, c2);

        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        new Frame1();
    }
}

編輯：響應您的編輯：使用額外的“增長”列為“封面藝術”

Answer 4

問題是你的c.weightx和c.weighty分配。 weightx和weighty確定當容器大於容納組件的首選大小所需的容器時，如何為GridBagLayout中的網格單元分配額外空間。

對於所有細胞，weightx和weighty應該為零，除了那些在窗口變大時你想要變大的細胞。