package publicway;
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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.ActionListener;
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import java.awt.geom.RoundRectangle2D;
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/**
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* 返回按钮工具类
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* 提供统一的返回按钮创建方法，左侧显示"返回"文字，右侧显示图标
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*/
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public final class Fanhuibutton {
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// 按钮固定尺寸
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private static final Dimension BUTTON_SIZE = new Dimension(150, 30);
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// 圆角半径
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private static final int CORNER_RADIUS = 8;
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// 主色调 (绿色)
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private static final Color BASE_COLOR = new Color(46, 139, 87);
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private Fanhuibutton() {
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// 工具类不需要实例化
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}
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/**
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* 创建返回按钮
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* 样式参考 buttonset，显示 "返回 >>"
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*
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* @param listener 按钮点击事件监听器
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* @return 配置好的返回按钮
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*/
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public static JButton createReturnButton(ActionListener listener) {
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// 创建自定义绘制的按钮
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JButton returnButton = new JButton("返回 >>") {
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private static final long serialVersionUID = 1L;
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@Override
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protected void paintComponent(Graphics g) {
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Graphics2D g2 = (Graphics2D) g.create();
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// 开启抗锯齿
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g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
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// 获取按钮状态
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boolean isPressed = getModel().isPressed();
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boolean isRollover = getModel().isRollover();
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int w = getWidth();
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int h = getHeight();
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// 计算当前背景色
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if (isPressed) {
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g2.setColor(BASE_COLOR.darker());
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} else if (isRollover) {
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g2.setColor(new Color(BASE_COLOR.getRed(), BASE_COLOR.getGreen(), BASE_COLOR.getBlue(), 220));
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} else {
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g2.setColor(BASE_COLOR);
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}
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// 绘制圆角矩形背景
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g2.fill(new RoundRectangle2D.Double(0, 0, w, h, CORNER_RADIUS, CORNER_RADIUS));
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// 绘制文字
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g2.setColor(Color.WHITE);
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g2.setFont(getFont());
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FontMetrics fm = g2.getFontMetrics();
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// 文字居中
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String text = getText();
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int textX = (w - fm.stringWidth(text)) / 2;
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int textY = (h - fm.getHeight()) / 2 + fm.getAscent();
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g2.drawString(text, textX, textY);
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g2.dispose();
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}
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};
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// 设置按钮样式属性
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returnButton.setFont(new Font("微软雅黑", Font.BOLD, 14));
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returnButton.setForeground(Color.WHITE);
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returnButton.setFocusPainted(false);
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returnButton.setContentAreaFilled(false);
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returnButton.setBorderPainted(false);
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returnButton.setCursor(new Cursor(Cursor.HAND_CURSOR));
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// 设置固定大小
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returnButton.setPreferredSize(BUTTON_SIZE);
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returnButton.setMinimumSize(BUTTON_SIZE);
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returnButton.setMaximumSize(BUTTON_SIZE);
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// 添加点击事件
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if (listener != null) {
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returnButton.addActionListener(listener);
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}
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return returnButton;
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}
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}
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