Gridlayout，对同一鼠标事件的每个单元格的不同操作

Question

我有一个填充了从文件加载的图像的 Gridlayout，我想在 mouseEvent mouseClicked 上为每个图像添加一个不同的，例如弹出窗口。如何确定我点击的是哪张图片？我尝试添加 GetComponentAt(Point)，但 Eclipse 一直将其显示为 mouseAdapter 的未识别方法，我如何确定 if 语句的字段？

这就是我所拥有的：

public class testclass implements ItemListener  {

JPanel template;
final static String title = "Title";

public void testclass (Container window){

    JPanel index = new JPanel();

    String index2[] = {title};
    JComboBox index3 = new JComboBox(index2);
    index3.setEditable(false);
    index3.addItemListener(this);
    index.add(index3);

     File folder = new File("images/");
        File[] listOfFiles = folder.listFiles();

        String nr;
        final JPanel panel = new JPanel(new GridLayout(4, 4, 4, 4));

        for (int i = 0; i < listOfFiles.length; i++) {
                nr = "images/" + listOfFiles[i].getName();
                final ImageIcon images = new ImageIcon(nr);
                final JLabel display[] = new JLabel[1];

            for (int n = 0; n < 1; n++){
                display[n] = new JLabel(images);
                panel.add(display[n]);  
         } }
            panel.addMouseListener(new MouseAdapter()

            { public void mouseClicked (MouseEvent e)
            {   //JPanel panel = (JPanel) getComponentAt(e.getPoint());
                JOptionPane.showMessageDialog(null, "Message");
            }}); 


    template = new JPanel(new CardLayout());
    template.add(panel, title);

    window.add(index, BorderLayout.PAGE_START);
    window.add(template, BorderLayout.CENTER);
}
public void itemStateChanged(ItemEvent event){

    CardLayout change = (CardLayout)(template.getLayout());
    change.show(template, (String)event.getItem());
}

private static void userinterface() {

    JFrame showwindow = new JFrame("Window");
    showwindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    testclass show = new testclass();
    show.testclass(showwindow.getContentPane());

    showwindow.pack();
    showwindow.setVisible(true);
}

public static void main(String[] args) {
    try {
        UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
          } catch(Exception e){
          }
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            userinterface();
        }
    });
}

}

Answer 1

编辑：正确答案

感谢您提供代码。我已经调整了一些东西，希望你能理解。

• 首先，我添加了一个新对象 ImageButton。从我添加 actionListener 开始，你想要的功能就已经完成了（减去漂亮的外观，你将不得不玩弄它，或者问另一个问题）
• 添加了“dir”字符串，这样您就不必继续复制和粘贴目录地址了。
• 我不得不通过 userInterface() 方法调整窗口的大小，您应该考虑能够缩短调整参数的顺序，也许是另一个 GUI 对象来将所有这些信息保存在一起。李>

有几点：

您编写的代码很好，但需要您进行大量调整（获取窗口大小并反复检查不同大小，如果您调整了窗口大小，鼠标点击可以点击其他您没有点击的图像）不想要！）为了让 mouseListener 工作，我猜你会提供各种各样的图像。

在你的代码中加入 cmets 可以帮助你和试图帮助你的人。

无论如何，如果这有帮助，请投票/接受答案，我相信它确实有效。

祝你好运！

---

将这些文件放入你的eclipse并运行它们，如果你调整dir字符串以遵循你的原始目录路径，它应该可以工作。

testclass.java

import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.io.File;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;

public class testclass implements ItemListener {

JPanel template;
final static String title = "Title";
final String dir = "images/";

public void testclass(Container window) {

    JPanel index = new JPanel();

    String[] index2 = { title };
    JComboBox index3 = new JComboBox(index2);
    index3.setEditable(false);
    index3.addItemListener(this);
    index.add(index3);
    index.setSize(500, 500);

    File folder = new File(dir);
    File[] listOfFiles = folder.listFiles();

    String nr;
    final JPanel panel = new JPanel(new GridLayout(4, 4, 4, 4));

    for (int i = 0; i < listOfFiles.length; i++) {
        nr = dir + listOfFiles[i].getName();

        panel.add(new ImageButton(nr));

    }

    template = new JPanel(new CardLayout());
    template.add(panel, title);

    window.add(template, BorderLayout.CENTER);
    window.add(index, BorderLayout.NORTH);

    window.setVisible(true);
}

public void itemStateChanged(ItemEvent event) {

    CardLayout change = (CardLayout) (template.getLayout());
    change.show(template, (String) event.getItem());
}

private static void userinterface() {

    JFrame showwindow = new JFrame("Window");
    showwindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    testclass show = new testclass();
    show.testclass(showwindow.getContentPane());

    showwindow.pack();
    showwindow.setVisible(true);
    showwindow.setSize(500, 500);
}

public static void main(String[] args) {
    try {
        UIManager
                .setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
    } catch (Exception e) {
    }
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            userinterface();
        }
    });
}
}

ImageButton.java

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JOptionPane;

public class ImageButton extends JButton {

private String fileName;
private ImageIcon image;
private JButton button;

public ImageButton(String fileName) {

    setFileName(fileName);
    setImage(new ImageIcon(fileName));
    setButton(new JButton(getImage()));

    this.setIcon(getImage());

    this.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent ae) {

            JOptionPane.showMessageDialog(null, ae.getSource());
        }
    });

}

public String getFileName() {
    return fileName;
}

public void setFileName(String fileName) {
    this.fileName = fileName;
}

public ImageIcon getImage() {
    return image;
}

public void setImage(ImageIcon image) {
    this.image = image;
}

public JButton getButton() {
    return button;
}

public void setButton(JButton button) {
    this.button = button;
}

}