摇摆:处理JFileChooser结果后采取行动? [英] Swing: process JFileChooser result after action?

问题描述

我想对JFileChooser按钮使用Abstract动作，因为会有很多这样的动作.

I want to use an Abstract action for JFileChooser buttons because there will be dozens of these.

public class OpenFileAction extends AbstractAction {
JFrame frame;
JFileChooser chooser;

OpenFileAction(JFrame frame, JFileChooser chooser) {
    super("Open...");
    this.chooser = chooser;
    this.frame = frame;
}

public void actionPerformed(ActionEvent evt) {
    // Show dialog; this method does not return until dialog is closed
    chooser.showOpenDialog(frame);
}
};

很显然，我想将JFileChooser结果写入变量.操作完成后如何访问e.getSource()?这是行不通的，因为它是在FileChooser对话框打开之前触发的:

Obviously I want to write the JFileChooser result to a variable. How can I access e.getSource() AFTER the action is finished? This does not work because it is triggered before the FileChooser Dialog opens:

    JButton btnNewButton_1 = new JButton(new OpenFileAction(new JFrame(), new JFileChooser(new File(".")) ) );
    btnNewButton_1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            //process e.getSource() ?
        }
    });

推荐答案

我认为您所追求的是以下几点:

I think what you're after is the following:

public abstract class OpenFileAction extends AbstractAction {
    JFrame frame;
    JFileChooser chooser;

    public OpenFileAction(JFrame frame, JFileChooser chooser) {
        super("Open...");
        this.chooser = chooser;
        this.frame = frame;
    }

    public void actionPerformed(ActionEvent evt) {
        int option = chooser.showOpenDialog(this.frame);
        if (option == JFileChooser.APPROVE_OPTION) {
            File selectedFile = chooser.getSelectedFile();
            doWithSelectedFile(selectedFile)
        }
    }

    /**
     * Method to override, which gets called with the selected file.
     */
    protected abstract doWithSelectedFile(File file);
}

...

OpenFileAction action = new OpenFileAction(frame, new JFileChooser(new File("."))) {
    @Override
    protected void doWithSelectedFile(File file) {
        // do what you want here
    }
};
JButton button = new JButton(action);

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