Java- 网格包布局中的 TitledBorder 随着 window 的扩展而扩展

Question

我正在使用具有标题边框的 GridBag 布局制作表单。第一个 TitledBorder panel 是 Customer Details 工作正常，除了我想知道如何在第一个标题和 textfield（例如名字）和以下标题和 textfield（例如姓氏）在它下面。

第二个 panel 的问题是房间详细信息，它随着我 enlarge/expand 和 window 的扩展而扩展，当发生这种情况时，其中的组件也会移动。我希望它像第一个 panel.

中的组件一样保持固定

这是form.java class:

public class form extends JFrame{


JPanel pnl= new JPanel();
JPanel pnl1= new JPanel();
JLabel fname= new JLabel("First name: ");
JLabel lname= new JLabel("Last name: ");
JLabel contact= new JLabel("Contact number: ");
JLabel email= new JLabel("Email address: ");
JLabel address= new JLabel("Address: ");
JLabel numpsns= new JLabel("Number of persons: ");
JTextField fnameField= new JTextField(25);
JTextField lnameField= new JTextField(25);
JTextField contactField= new JTextField(25);
JTextField emailField= new JTextField(25);
JTextArea txtadd= new JTextArea(5, 25);

SpinnerModel sm= new SpinnerNumberModel(1,0,30,1);
JSpinner spinner= new JSpinner(sm);

public form(){

    this.setTitle("Reservation Form");


    pnl.setBorder(new TitledBorder(null,"Customer Details", TitledBorder.CENTER, TitledBorder.TOP, null, null));
    getContentPane().add(pnl, BorderLayout.NORTH);

    pnl.setLayout(new GridBagLayout());
    GridBagConstraints gc= new GridBagConstraints();

    //first column of the grid//
    gc.anchor= GridBagConstraints.EAST;
    gc.weightx=0.5;
    gc.weighty=0.5;

    gc.gridx=0;
    gc.gridy=0;

    pnl.add(fname, gc);

    gc.gridx=0;
    gc.gridy=1;
    pnl.add(lname,gc);

    gc.gridx=0;
    gc.gridy=2;
    pnl.add(contact, gc);

    gc.gridx=0;
    gc.gridy=3;
    pnl.add(email, gc);

    gc.gridx=0;
    gc.gridy=4;
    pnl.add(address, gc);

    //second column//
    gc.anchor= GridBagConstraints.WEST;
    gc.gridx=1;
    gc.gridy= 0;
    pnl.add(fnameField,gc);

    gc.gridx=1;
    gc.gridy=1;
    pnl.add(lnameField, gc);

    gc.gridx=1;
    gc.gridy=2;
    pnl.add(contactField, gc);

    gc.gridx=1;
    gc.gridy=3;
    pnl.add(emailField, gc);

    gc.gridx=1;
    gc.gridy=4;
    pnl.add(txtadd, gc);

    //second Titled Border//        

    pnl1.setBorder(BorderFactory.createTitledBorder(null, "Booking Details", TitledBorder.CENTER, TitledBorder.CENTER));

    add(pnl1, BorderLayout.CENTER);

    pnl1.setLayout(new GridBagLayout());
    GridBagConstraints gc1= new GridBagConstraints();


    //first column//

    gc1.weightx= 0.5;
    gc1.weighty=0.5;

    gc1.gridx=0;
    gc1.gridy=0;

    pnl1.add(numpsns, gc1);

    gc1.anchor= GridBagConstraints.WEST;
    gc1.gridx=1;
    gc1.gridy= 0;
    pnl1.add(spinner,gc1);




       }

 }

form_main.java class

public class form_main {

 public static void main(String[] args) {

    form form_display= new form();
     form_display.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
     form_display.pack();
     form_display.setSize(500,280);
     form_display.setVisible(true);

    }

 }

这是它的截图：

Answer 1

您已将第二个面板添加到 BorderLayout 的 CENTRE 位置，这是此类布局的预期行为。也许你应该使用另一个 GridBagLayout 来布置两个面板

要向面板添加内部间距，您可以使用 CompoundLayout、将 TitledBorder 和 EmptyBorder 包裹在一起或设置 GridBagConstraints#insets 属性

简单的例子...

import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSpinner;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SpinnerModel;
import javax.swing.SpinnerNumberModel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.Border;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;

public class Form extends JFrame {

    JPanel pnl = new JPanel();
    JPanel pnl1 = new JPanel();
    JLabel fname = new JLabel("First name: ");
    JLabel lname = new JLabel("Last name: ");
    JLabel contact = new JLabel("Contact number: ");
    JLabel email = new JLabel("Email address: ");
    JLabel address = new JLabel("Address: ");
    JLabel numpsns = new JLabel("Number of persons: ");
    JTextField fnameField = new JTextField(25);
    JTextField lnameField = new JTextField(25);
    JTextField contactField = new JTextField(25);
    JTextField emailField = new JTextField(25);
    JTextArea txtadd = new JTextArea(5, 25);

    SpinnerModel sm = new SpinnerNumberModel(1, 0, 30, 1);
    JSpinner spinner = new JSpinner(sm);

    public Form() {

        this.setTitle("Reservation Form");
        setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridwidth = GridBagConstraints.REMAINDER;
        gbc.fill = gbc.HORIZONTAL;

        Border border = new CompoundBorder(
                new TitledBorder(null, "Customer Details", TitledBorder.CENTER, TitledBorder.TOP, null, null),
                new EmptyBorder(10, 10, 10, 10));

        pnl.setBorder(border);
        getContentPane().add(pnl, gbc);

        pnl.setLayout(new GridBagLayout());
        GridBagConstraints gc = new GridBagConstraints();

        //first column of the grid//
        gc.anchor = GridBagConstraints.EAST;
        gc.weightx = 0.5;
        gc.weighty = 0.5;

        gc.gridx = 0;
        gc.gridy = 0;

        pnl.add(fname, gc);

        gc.gridx = 0;
        gc.gridy = 1;
        pnl.add(lname, gc);

        gc.gridx = 0;
        gc.gridy = 2;
        pnl.add(contact, gc);

        gc.gridx = 0;
        gc.gridy = 3;
        pnl.add(email, gc);

        gc.gridx = 0;
        gc.gridy = 4;
        pnl.add(address, gc);

        //second column//
        gc.anchor = GridBagConstraints.WEST;
        gc.gridx = 1;
        gc.gridy = 0;
        pnl.add(fnameField, gc);

        gc.gridx = 1;
        gc.gridy = 1;
        pnl.add(lnameField, gc);

        gc.gridx = 1;
        gc.gridy = 2;
        pnl.add(contactField, gc);

        gc.gridx = 1;
        gc.gridy = 3;
        pnl.add(emailField, gc);

        gc.gridx = 1;
        gc.gridy = 4;
        pnl.add(txtadd, gc);

        //second Titled Border//        
        pnl1.setBorder(BorderFactory.createTitledBorder(null, "Booking Details", TitledBorder.CENTER, TitledBorder.CENTER));

        add(pnl1, gbc);

        pnl1.setLayout(new GridBagLayout());
        GridBagConstraints gc1 = new GridBagConstraints();

        //first column//
        gc1.weightx = 0.5;
        gc1.weighty = 0.5;

        gc1.gridx = 0;
        gc1.gridy = 0;

        pnl1.add(numpsns, gc1);

        gc1.anchor = GridBagConstraints.WEST;
        gc1.gridx = 1;
        gc1.gridy = 0;
        pnl1.add(spinner, gc1);

    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                Form frame = new Form();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

}

Thanks a lot. Can you show me how I can change the font and size of the titles(like Customer Details, Booking Details) of the borders? Font.BOLD doesn't seem to work in createTitledBorder

...

new TitledBorder(null, "Customer Details", TitledBorder.CENTER, TitledBorder.TOP, UIManager.getFont("Label.font").deriveFont(Font.BOLD), null);

...

That didn't work

适合我...

import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.TitledBorder;

public class Test {

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

    public Test() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                    ex.printStackTrace();
                }

                JFrame frame = new JFrame("Testing");
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.add(new TestPane());
                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }

    public class TestPane extends JPanel {

        public TestPane() {
            setLayout(new GridBagLayout());
            JPanel p1 = new JPanel();
            p1.setBorder(new TitledBorder(null, "Customer Details", TitledBorder.CENTER, TitledBorder.TOP, null, null));
            JPanel p2 = new JPanel();
            p2.setBorder(new TitledBorder(null, "Customer Details", TitledBorder.CENTER, TitledBorder.TOP, UIManager.getFont("Label.font").deriveFont(Font.BOLD), null));
            JPanel p3 = new JPanel();
            p3.setBorder(new TitledBorder(null, "Customer Details", TitledBorder.CENTER, TitledBorder.TOP, UIManager.getFont("Label.font").deriveFont(Font.ITALIC), null));
            JPanel p4 = new JPanel();
            p4.setBorder(new TitledBorder(null, "Customer Details", TitledBorder.CENTER, TitledBorder.TOP, UIManager.getFont("Label.font").deriveFont(Font.BOLD | Font.ITALIC), null));

            GridBagConstraints gbc = new GridBagConstraints();
            gbc.gridwidth = GridBagConstraints.REMAINDER;
            gbc.weightx = 1;
            gbc.weighty = 1;
            gbc.fill = GridBagConstraints.BOTH;

            add(p1, gbc);
            add(p2, gbc);
            add(p3, gbc);
            add(p4, gbc);
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(200, 200);
        }

    }

}

Java- 网格包布局中的 TitledBorder 随着 window 的扩展而扩展

Java- TitledBorder in gridbag layout expanding as the window expands

java

swing

titled-border

gridbaglayout

简单的例子...