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 tri
As I understand the question, it's about validating the input in the editor (the model protecting itself against invalid values is another story, IMO) and notifying the user about his/her error when s/he tries to commit the input.
A simple means of doing so is using an InputVerifier:
Some code snippet:
final InputVerifier iv = new InputVerifier() {
@Override
public boolean verify(JComponent input) {
JTextField field = (JTextField) input;
return field.getText().length() > 8;
}
@Override
public boolean shouldYieldFocus(JComponent input) {
boolean valid = verify(input);
if (!valid) {
JOptionPane.showMessageDialog(null, "invalid");
}
return valid;
}
};
DefaultCellEditor editor = new DefaultCellEditor(new JTextField()) {
{
getComponent().setInputVerifier(iv);
}
@Override
public boolean stopCellEditing() {
if (!iv.shouldYieldFocus(getComponent())) return false;
return super.stopCellEditing();
}
@Override
public JTextField getComponent() {
return (JTextField) super.getComponent();
}
};
JTable table = new JTable(10, 2);
table.setDefaultEditor(Object.class, editor);
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;
}
}
Override the stopCellEditing() and u can try the below code to get the focus for the error cell.
class PasswordEditor extends DefaultCellEditor
{
private TextBox m_passWord = new TextBox();
public PasswordEditor() {
super(new TextBox());
}
@Override
public boolean stopCellEditing()
{
if(getCellEditorValue().toString().length() < 8)
{
// Text box will get the focus and will shown in Red line as border for that cell.
TextBox aTextBox = (TextBox)getComponent();
aTextBox.setBorder(new LineBorder(Color.red));
aTextBox.selectAll();
aTextBox.requestFocusInWindow();
JOptionPane.showMessageDialog(UsmUserView.this.m_Parent, "Password Must Be 8 Bytes Long !! Please Check");
return false;
}
return super.stopCellEditing();
}
@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;
}
}