java - JSpinner 的 JButton 到 ImageIcon

Question

尝试将 JSpinner 的 JButton Controller 替换为 ImageIcon。但出于某种原因，它不听任何 mouseclicks(installButtonListeners() in BasicSpinnerUI 似乎添加了 MouseListener)。任何想法为什么以及如何解决？

public class SpinnerIconBtn extends JFrame {

    public SpinnerIconBtn(){
        JSpinner spinner = new JSpinner();
        spinner.setUI(new JSpinnerArrow());

        this.add(spinner);
        this.pack();
        this.setVisible(true);
    }

    class JSpinnerArrow extends BasicSpinnerUI {

        @Override
        protected Component createNextButton() {
            Component c = createArrowButton(SwingConstants.NORTH);
            c.setName("Spinner.nextButton");
            installNextButtonListeners(c);
            return c;
        }

        @Override
        protected Component createPreviousButton() {
            Component c = createArrowButton(SwingConstants.SOUTH);
            c.setName("Spinner.previousButton");
            installPreviousButtonListeners(c);
            return c;
        }

        private Component createArrowButton(int direction) {
            String path = "/Users/tst.png";
            JLabel icon = new JLabel(new ImageIcon(path));
            return icon;
        }
    }

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

Answer 1

• 不要改变图标，使用 paintIcon()

• 如果 ArrowsButtons 移动或图标太大，请更改 LayoutManager

.

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

class Testing {
    //int counter = 0;//proper setting

    int counter = 7195;//testing hours 'tick over' correctly
    JSpinner spinner = new JSpinner();
    JTextField editor = ((JSpinner.DefaultEditor) spinner.getEditor()).getTextField();
    java.text.DecimalFormat df = new java.text.DecimalFormat("00");

    public void buildGUI() {
        spinner.setUI(new EndlessHoursUI());
        JFrame f = new JFrame();
        f.getContentPane().add(spinner);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.setVisible(true);
    }

    class EndlessHoursUI extends javax.swing.plaf.basic.BasicSpinnerUI {

        public EndlessHoursUI() {
            setTime();
        }

        @Override
        protected void installNextButtonListeners(Component c) {
        }// do nothing

        @Override
        protected void installPreviousButtonListeners(Component c) {
        }// do nothing

        @Override
        protected Component createNextButton() {
            JButton btnNext = (JButton) super.createNextButton();
            btnNext.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent ae) {
                    changeSpinner(1);
                }
            });
            return btnNext;
        }

        @Override
        protected Component createPreviousButton() {
            JButton btnPrevious = (JButton) super.createPreviousButton();
            btnPrevious.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent ae) {
                    changeSpinner(-1);
                }
            });
            return btnPrevious;
        }
    }

    public void changeSpinner(int amount) {
        if (counter > 0 || amount > 0) {
            counter += amount;
            setTime();
        }
    }

    public void setTime() {
        int hours = counter / 3600;
        int mins = (counter / 60) % 60;
        int secs = counter % 60;
        String time = df.format(hours) + ":" + df.format(mins) + ":" + df.format(secs);
        editor.setText(time);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new Testing().buildGUI();
            }
        });
    }
}