swing - GridBagLayout 中带有长文本的 JLabel

Question

我正在尝试设计一个弹出窗口来通知收到一封新电子邮件。 这是代码：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.ImageIcon;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

/**
 *
 * @author luca
 */
public class Popup extends JDialog {


    public Popup() {
        super.setSize(260, 100);

        this.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();

        gbc.insets = new Insets(5, 5, 5, 5);


        JLabel header = new JLabel("Hai ricevuto una nuova email");
        gbc.gridx = 1;
        gbc.gridy = 0;
        gbc.gridheight = 1;
        gbc.anchor = GridBagConstraints.WEST;
        add(header, gbc);

        JLabel mittente = new JLabel("luca.cillario@yahoo.it");
        gbc.gridx = 1;
        gbc.gridy = 1;
        gbc.gridheight = 1;
        add(mittente, gbc);

        JLabel argomento = new JLabel("info voto esame");
        gbc.gridx = 1;
        gbc.gridy = 2;
        gbc.gridheight = 1;
        add(argomento, gbc);

        JLabel icona = new JLabel(new ImageIcon("img/email.png"));
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.gridheight = 3;
        gbc.fill = GridBagConstraints.BOTH;
        add(icona, gbc);


        this.setLocation(400, 400);
        this.setUndecorated(true);
        this.setVisible(true);
        mittente.setMaximumSize(new Dimension(180, 16));
    }

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

}

当标签中的文本不是太长时，一切正常，我得到这样的东西：

但是当文本太长时，这就是我得到的：

有没有办法得到这样的东西？

我发现了关于这件事的其他问题，我尝试处理 label.setMaximumSize()，我尝试使用 html 标签编写文本……但没有任何结果。有人可以帮我吗？

Answer 1

在这种情况下，将图像的weightx 设置为 1 会有所帮助，而其他所有内容都设置为 0。还有各种其他更改。仔细检查代码是否有更改。

我还建议将全文设置为每个标签的工具提示。如果用户想查看全部细节，只需将鼠标指向标签即可。

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

public class Popup extends JDialog {

    public Popup() {
        this.setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();

        gbc.insets = new Insets(5, 5, 5, 5);

        JLabel header = new JLabel("Hai ricevuto una nuova email");
        gbc.gridx = 1;
        gbc.gridy = 0;
        gbc.gridheight = 1;
        gbc.weightx = 1;
        gbc.anchor = GridBagConstraints.WEST;
        add(header, gbc);

        gbc.weightx = 0;
        JLabel mittente = new JLabel("luca.cillario@yahoo.itabcditabcditabcditabcditabcd");
        gbc.gridx = 1;
        gbc.gridy = 1;
        gbc.gridheight = 1;
        add(mittente, gbc);

        JLabel argomento = new JLabel("info voto esame");
        gbc.gridx = 1;
        gbc.gridy = 2;
        gbc.gridheight = 1;
        add(argomento, gbc);

        JLabel icona = new JLabel(new ImageIcon(
                new BufferedImage(40,60,BufferedImage.TYPE_INT_RGB)));
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.gridheight = 3;
        gbc.fill = GridBagConstraints.BOTH;
        add(icona, gbc);

        this.setLocation(400, 400);
        this.setUndecorated(true);
        pack();
        super.setSize(260, 100);
        this.setVisible(true);
        mittente.setMaximumSize(new Dimension(180, 16));
    }

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