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?
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
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
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,-
on 2dn。 focusLost
有效......
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();
}
});
}
}