使用编辑器验证表的单元格 [英] validate a table's cell using editors
本文介绍了使用编辑器验证表的单元格的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的JTable有一个密码字段编辑器。我想在用户单击编辑另一个字段时,如果文本长度小于8位,则显示错误消息。我尝试过焦点听众。但它不起作用。请帮助我,因为我刚刚开始使用java swing。
I have a Password field editor for my JTable. I want to display an error message if the text length is less than 8 bit when the user clicks to edit another field. I have tried focus listeners. But its not working. Please help me because i have just started workin with java swing.
class PasswordEditor extends DefaultCellEditor
{
TextBox m_passWord = new TextBox();
public PasswordEditor() {
super(new TextBox());
}
@Override
public Object getCellEditorValue() {
return this.m_passWord.getText();
}
@Override
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
Object fieldValue = value;
if(null == fieldValue)
fieldValue = Constants.EMPTY_STRING;
this.m_passWord.addInputMethodListener(new InputMethodListener() {
@Override
public void inputMethodTextChanged(InputMethodEvent event)
{
// TODO Auto-generated method stub
}
@Override
public void caretPositionChanged(InputMethodEvent event)
{
// TODO Auto-generated method stub
}
})
this.m_passWord.addFocusListener(new FocusListener() {
@Override
public void focusLost(FocusEvent e)
{
if (!e.isTemporary()) {
String content = PasswordEditor.this.m_passWord.getText();
System.out.println((content));
}
}
@Override
public void focusGained(FocusEvent e)
{
//TODO init
}
});
this.m_passWord.setEditable(true);
this.m_passWord.setText(fieldValue.toString());
return this.m_passWord;
}
}
推荐答案
覆盖stopCellEditing()并在其中实现条件。
Override stopCellEditing() and implement the condition inside it.
class PasswordEditor extends DefaultCellEditor
{
TextBox m_passWord = new TextBox();
public PasswordEditor() {
super(new TextBox());
}
@Override
public boolean stopCellEditing()
{
if(getCellEditorValue().toString().length() < 8)
{
JOptionPane.showMessageDialog(UsmUserView.this.m_Parent, "Password Must Be 8 Bytes Long !! Please Check");
return false;
}
fireEditingStopped();
return true;
}
@Override
public Object getCellEditorValue() {
return this.m_passWord.getText();
}
@Override
public Component getTableCellEditorComponent(JTable table,
Object value, boolean isSelected, int row, int column) {
Object fieldValue = value;
if(null == fieldValue)
fieldValue = Constants.EMPTY_STRING;
this.m_passWord.setEditable(true);
this.m_passWord.setText(fieldValue.toString());
return this.m_passWord;
}
}
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