使用 Java Swing JLabel 进行缩放时效果不佳

Question

目前，我正在做一个学习项目，但我遇到了一个问题，我既找不到解决方案也无法理解问题..

我在 Java 中制作了一个响应式计算器，每个键都是响应式的。但是，我的显示区域 (JLabel) 不会填充 HORIZONTAL 我的 window。如果我增加它的大小，它是改变它大小的所有列！ ><

有人可以帮助我吗？

import java.awt.Color;
import java.awt.ComponentOrientation;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;

public class CalculatorUI {
static JButton designButton(GridBagConstraints gbc, String text)
{
     JButton button = new JButton(text);
     ImageIcon image;
     Border withoutBorder = new LineBorder(new Color(75, 75, 75), 1, true);
     button.setBorder(withoutBorder);   
     button.setFont(new Font("Gill Sans MT", Font.BOLD, 40));
     button.setBackground(new java.awt.Color(23,23,23));
     gbc.weightx = 0.5;
     gbc.weighty = 0.5;
     gbc.fill = GridBagConstraints.BOTH;
     gbc.gridwidth = 1;
     switch (text) {
     case "sqr":
         button.setText("\u221A");
         button.setForeground(new Color(150, 150, 150));
         break;
     case "sq":
         button.setText("x²");
         button.setForeground(new Color(150, 150, 150));
         break;
     case "1x":
         image = new ImageIcon("C:\Users\Emixam23\Documents\Workspace\SimpleCount\assets\1x.png");
         button.setText(null);
         button.setIcon(image);
         break;
     case "DEL":
         image = new ImageIcon("C:\Users\Emixam23\Documents\Workspace\SimpleCount\assets\del.png");
         button.setText(null);
         button.setIcon(image);
         break;
     case "DIV":
         image = new ImageIcon("C:\Users\Emixam23\Documents\Workspace\SimpleCount\assets\div.png");
         button.setText(null);
         button.setIcon(image);
         break;
     // CS -> Change sign !
     case "CS":
         image = new ImageIcon("C:\Users\Emixam23\Documents\Workspace\SimpleCount\assets\cs.png");
         button.setText(null);
         button.setIcon(image);
         break;          
     default:
         button.setForeground(new Color(150, 150, 150));
         break;
    }
     return (button);
}

static JLabel designTextField(GridBagConstraints gbc)
{
    JLabel display = new JLabel("---------------");
    Border withoutBorder = new LineBorder(new Color(0, 0, 0), 0, true);
    display.setBorder(withoutBorder);   
    //display.setFont(new Font("Gill Sans MT", Font.BOLD, 40));
    gbc.fill = GridBagConstraints.NORTH;
    gbc.weightx = 0.5;
    gbc.gridx = 0;
    gbc.gridy = 0;
    return (display);
}

public static void makeSimpleGUI(Container pane) {
    JButton button;

    pane.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
    pane.setLayout(new GridBagLayout());
    GridBagConstraints gbc = new GridBagConstraints();

    //Add of jlabel to display results
    pane.add(designTextField(gbc));

    String[] keys = {"%", "sqr", "sq", "1x", "CE", "C", "DEL", "DIV", "7", "8", "9", "X", "4", "5", "6", "-", "1", "2", "3", "+", "CS", "0", ".", "="};
    for (int i = 0; i < keys.length; i++)
    {
        button = designButton(gbc, keys[i]);
        gbc.gridx = i % 4;
        gbc.gridy = 1 + (i / 4);
        pane.add(button, gbc);
    }
}

public static void CalculatorGUI() {
    JFrame frame = new JFrame("SimpleCount");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    makeSimpleGUI(frame.getContentPane());
    frame.setMinimumSize(new Dimension(400, 400));
    frame.setVisible(true);
}

public static void main(String[] args) {
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            CalculatorGUI();
        }
    });
}
}

Answer 1

您将 JLabel 添加到面板使用...

pane.add(designTextField(gbc));

但这并不适用于 GridBagConstraints，方法修改了标签，相反，您应该做一些更像...

pane.add(designTextField(gbc), gbc);

但是，我不鼓励以这种方式做事，你的方法不应该有副作用，它应该做一个工作并且把它做好

static JLabel designTextField()
{
    JLabel display = new JLabel("---------------");
    Border withoutBorder = new LineBorder(new Color(0, 0, 0), 0, true);
    display.setBorder(withoutBorder);   
    //display.setFont(new Font("Gill Sans MT", Font.BOLD, 40));
    return (display);
}

public static void makeSimpleGUI(Container pane) {
    JButton button;

    pane.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
    pane.setLayout(new GridBagLayout());
    GridBagConstraints gbc = new GridBagConstraints();
    gbc.fill = GridBagConstraints.HORIZONTAL;
    gbc.weightx = 0.5;
    gbc.gridx = 0;
    gbc.gridy = 0;

    //Add of jlabel to display results
    pane.add(designTextField(), gbc);

另外GridBagConstraints.NORTH是锚属性，不是填充属性

因为 JLabel 和按钮共享相同的 space（列），您需要允许标签跨越多个列。

添加...

gbc.gridwidth = GridBagConstraints.REMAINDER;

约束条件

我使用了红色的LineBorder，这样我可以直观地看到布局

使用 Java Swing JLabel 进行缩放时效果不佳

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