为什么我必须为此 JFormattedTextField 按两次 Enter 才能激活 JDialog 的默认按钮？

发布于 2024-09-19 20:47:52 字数 1425 浏览 9 评论 0原文

在下面的代码示例中，如果用户更改 JFormattedTextField 的内容然后按 Enter，则该对话框应该表现得就像按下“确定”按钮一样。但需要按两次 Enter 键才能发生此情况。

普通的 JTextField 总是按照我的预期运行 - 更改文本然后按 Enter 键会立即激活“确定”按钮。

此功能适用于 Mac OS X 10.6 以及当前的 Mac Java 更新 1.6.0_20。

这是一个解决方法吗？这是 Mac 特有的问题吗？

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.text.NumberFormat;
import java.text.ParseException;

public class ScratchSpace {


    public static void main(final String[] args) throws ParseException {
        final JDialog dialog = new JDialog((Frame) null, "Test", true);
        dialog.setLayout(new FlowLayout());

        dialog.add(new JLabel("text field: "));
        dialog.add(new JTextField(20));

        dialog.add(new JLabel("formatted text field: "));
        final JFormattedTextField formattedTextField = new JFormattedTextField(NumberFormat.getIntegerInstance());
        formattedTextField.setValue(42);
        formattedTextField.setColumns(20);
        dialog.add(formattedTextField);

        final JButton okButton = new JButton(new AbstractAction("OK") {
            public void actionPerformed(ActionEvent e) {
                dialog.dispose();
            }
        });

        dialog.add(okButton);
        dialog.getRootPane().setDefaultButton(okButton);
        dialog.pack();
        dialog.setLocationRelativeTo(null);
        dialog.setVisible(true);
    }

}

原文

In the code sample below, if a user changes the contents of the JFormattedTextField then presses Enter, the dialog is supposed to act as if the OK button is pressed. But it takes two presses of Enter for this to happen.

The plain vanilla JTextField always acts as I would expect - changing the text then pressing Enter activates the OK button straight away.

This in on Mac OS X 10.6 with the current Mac Java update 1.6.0_20.

Is this a work-around? Is this a Mac specific problem?

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.text.NumberFormat;
import java.text.ParseException;

public class ScratchSpace {


    public static void main(final String[] args) throws ParseException {
        final JDialog dialog = new JDialog((Frame) null, "Test", true);
        dialog.setLayout(new FlowLayout());

        dialog.add(new JLabel("text field: "));
        dialog.add(new JTextField(20));

        dialog.add(new JLabel("formatted text field: "));
        final JFormattedTextField formattedTextField = new JFormattedTextField(NumberFormat.getIntegerInstance());
        formattedTextField.setValue(42);
        formattedTextField.setColumns(20);
        dialog.add(formattedTextField);

        final JButton okButton = new JButton(new AbstractAction("OK") {
            public void actionPerformed(ActionEvent e) {
                dialog.dispose();
            }
        });

        dialog.add(okButton);
        dialog.getRootPane().setDefaultButton(okButton);
        dialog.pack();
        dialog.setLocationRelativeTo(null);
        dialog.setVisible(true);
    }

}

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孤独难免 2024-09-26 20:47:52

添加这段代码解决了问题，

formattedTextField.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent arg0) {
        dialog.dispose();
    }
});

Adding this code solved the problem,

formattedTextField.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent arg0) {
        dialog.dispose();
    }
});

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饮惑 2024-09-26 20:47:52

这并没有解决我的问题。然而，问题的解决方案对我来说似乎要简单得多：

        private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
   add(jTextField1);          //this reacts after the "ENTER" gets pressed
   jButton1.doClick();        //this activates the button
   jTextField1.setText("");   //this removes the text from a text-field
  jTextField1.grabFocus();    //this sets a cursor within a text-field
    }

This did not solve my problem. However, it seemed that the problem solution was much simpler for me:

        private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
   add(jTextField1);          //this reacts after the "ENTER" gets pressed
   jButton1.doClick();        //this activates the button
   jTextField1.setText("");   //this removes the text from a text-field
  jTextField1.grabFocus();    //this sets a cursor within a text-field
    }

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~没有更多了~