jFormattedTextField的Formatter.setCommitsOnValidEdit(true)在第一次焦点时不起作用

时间:2011-09-02 12:22:43

标签: java swing event-listener propertychanged jformattedtextfield

我有一个jFormattedTextField并且我将setCommitsOnValidEdit设置为true然后我在“value”属性上为“property change”添加了一个事件监听器。

首先关注那个jFormattedTextField,它在输入时不会调用事件监听器方法。但是在“focusLost”上它会调用事件监听器,之后当它再次获得焦点时,它会在输入时调用事件监听器。

我希望在jFormattedTextField中的任何时间发生任何变化后调用事件监听器(即使在第一个焦点中)。

有什么问题?我该如何解决?

2 个答案:

答案 0 :(得分:3)

实际上,setCommitOnValidEdit应该始终如你所愿(并在下面的代码片段中工作),不需要DocumentListener,毕竟,该方法完全是为了这个目的。所以我怀疑你的背景中还有其他错误。或者由于某种原因,第一次编辑没有被解析为有效的东西?

    NumberFormatter numberFormatter = new NumberFormatter( 
            NumberFormat.getIntegerInstance());
    // allow or not doesn't make a difference
    numberFormatter.setAllowsInvalid(false);  
    numberFormatter.setCommitsOnValidEdit(true);
    JFormattedTextField readTimeOut = new JFormattedTextField(numberFormatter);
    PropertyChangeListener l = new PropertyChangeListener() {

        @Override
        public void propertyChange(PropertyChangeEvent evt) {
            LOG.info("got new value: " + evt.getNewValue());
        }
    };
    readTimeOut.addPropertyChangeListener("value", l);
    readTimeOut.setColumns(20);
    readTimeOut.setHorizontalAlignment(SwingConstants.RIGHT);    

    JFormattedTextField other = new JFormattedTextField(numberFormatter);
    other.addPropertyChangeListener("value", l);
    other.setColumns(20);
    other.setHorizontalAlignment(SwingConstants.RIGHT);    
    JPanel box = new JPanel();
    box.add(readTimeOut);
    box.add(other);

答案 1 :(得分:2)

可能您必须查看DocumentListener示例here

编辑:

我从JFormattedTextField的第一次触摸中知道了这个问题,这里的例子不适用于focusLost :-)并且可能证明了你的问题

对于10.000,-

最低限额设置为JFormattedTextField

第一。 JFormattedTextField处理FocusListener(输出必须延迟到invokeLater

第二。 JFormattedTextField处理DocumentListener(每个都有效......)

初始看

enter image description here

这里也是同样的问题,因为我这里只放了500,而且在focusLost上没有任何改变,正确的金额必须是> = 10.000,-

enter image description here

on 2dn。 focusLost有效......

enter image description here

不知道这是怎么可能的,但是通过包装到invokeLater()解决,然后在第一个工作。 focusLost(您必须取消注释这些代码行)

来自代码

import java.awt.*;
import java.awt.event.*;
import java.math.RoundingMode;
import java.text.NumberFormat;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;

public class FormatterLimit {

    private JFrame frame = new JFrame();
    private JPanel pnl = new JPanel();
    private JLabel focusLabel = new JLabel(" focusLost Handle ");
    private JFormattedTextField formTextField;
    private JLabel docLabel = new JLabel(" document Handle ");
    private JFormattedTextField formTextField1;
    private NumberFormat formTextFieldFormat;
    private double amount = 10000.00;

    public FormatterLimit() {
        formTextFieldFormat = NumberFormat.getNumberInstance();
        formTextFieldFormat.setMinimumFractionDigits(2);
        formTextFieldFormat.setMaximumFractionDigits(2);
        formTextFieldFormat.setRoundingMode(RoundingMode.HALF_UP);

        focusLabel.setFont(new Font("Serif", Font.BOLD, 14));
        focusLabel.setForeground(Color.blue);
        focusLabel.setPreferredSize(new Dimension(120, 27));
        formTextField = new JFormattedTextField(formTextFieldFormat);
        formTextField.setValue(amount);
        formTextField.setFont(new Font("Serif", Font.BOLD, 22));
        formTextField.setForeground(Color.black);
        formTextField.setBackground(Color.yellow);
        formTextField.setPreferredSize(new Dimension(120, 27));
        formTextField.setHorizontalAlignment(SwingConstants.RIGHT);
        formTextField.addFocusListener(new FocusListener() {

            @Override
            public void focusGained(FocusEvent e) {
                formTextField.requestFocus();
                formTextField.setText(formTextField.getText());
                formTextField.selectAll();
            }

            @Override
            public void focusLost(FocusEvent e) {
                //Runnable doRun = new Runnable() {

                //@Override
                //public void run() {
                double t1a1 = (((Number) formTextField.getValue()).doubleValue());
                if (t1a1 < 1000) {
                    formTextField.setValue(amount);
                }
                //}
                // };
                //SwingUtilities.invokeLater(doRun);

            }
        });

        docLabel.setFont(new Font("Serif", Font.BOLD, 14));
        docLabel.setForeground(Color.blue);
        docLabel.setPreferredSize(new Dimension(120, 27));

        formTextField1 = new JFormattedTextField(formTextFieldFormat);
        formTextField1.setValue(amount);
        formTextField1.setFont(new Font("Serif", Font.BOLD, 22));
        formTextField1.setForeground(Color.black);
        formTextField1.setBackground(Color.yellow);
        formTextField1.setPreferredSize(new Dimension(120, 27));
        formTextField1.setHorizontalAlignment(SwingConstants.RIGHT);
        formTextField1.addFocusListener(new FocusListener() {

            @Override
            public void focusGained(FocusEvent e) {
                formTextField1.requestFocus();
                formTextField1.setText(formTextField1.getText());
                formTextField1.selectAll();
            }

            @Override
            public void focusLost(FocusEvent e) {
            }
        });
        formTextField1.getDocument().addDocumentListener(docListener);

        pnl = new JPanel();
        pnl.setBorder(new EmptyBorder(2, 2, 2, 2));
        pnl.setLayout(new GridLayout(2, 2));
        pnl.add(focusLabel);
        pnl.add(formTextField);
        pnl.add(docLabel);
        pnl.add(formTextField1);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(pnl, BorderLayout.CENTER);
        frame.setLocation(200, 200);
        frame.pack();
        frame.setVisible(true);
        formTextFieldFocus1();
    }
    //
    private DocumentListener docListener = new DocumentListener() {

        @Override
        public void changedUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        @Override
        public void insertUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        @Override
        public void removeUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        private void printIt(DocumentEvent documentEvent) {
            DocumentEvent.EventType type = documentEvent.getType();
            double t1a1 = (((Number) formTextField1.getValue()).doubleValue());
            if (t1a1 < 1000) {
                Runnable doRun = new Runnable() {

                    @Override
                    public void run() {
                        formTextField1.setValue(amount);
                    }
                };
                SwingUtilities.invokeLater(doRun);
            }
        }
    };

    private void formTextFieldFocus1() {
        Runnable doRun = new Runnable() {

            @Override
            public void run() {
                formTextField1.grabFocus();
                formTextField1.requestFocus();
                formTextField1.setText(formTextField1.getText());
                formTextField1.selectAll();
            }
        };
        SwingUtilities.invokeLater(doRun);
    }

    private void formTextFieldFocus() {
        Runnable doRun = new Runnable() {

            @Override
            public void run() {
                formTextField.grabFocus();
                formTextField.requestFocus();
                formTextField.setText(formTextField.getText());
                formTextField.selectAll();
                formTextFieldFocus1();
            }
        };
        SwingUtilities.invokeLater(doRun);
    }

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

            @Override
            public void run() {
                FormatterLimit fl = new FormatterLimit();
            }
        });
    }
}