Java Swing JTextField setInputVerifier keep focus on TextField

Question

I have a public class JdbDateTextField extends JTextField and in the constructor I add this.setInputVerifier(new ValidDateOrEmptyVerifier()); .

I use class ValidDateOrEmptyVerifier extends InputVerifier to verify the format of the input.

If the input is in the wrong format and the user looses the focus of the JdbDateTextField , I return false in the ValidDateOrEmptyVerifier and the focus is gained again to the JdbDateTextField again.

This works if the user switches from the JdbDateTextField to another textField or presses a Button. If pressing a button and the format of the input in the is wrong then no action for the button is performed and the focus is still at the JdbDateTextField .

This is exactly what I want. The user can not leave the JdbDateTextField until he enters a valid string.

The problem is that the JdbDateTextField is in a JPanel which is in a JTabbedPane so I have a GUI with several tabs.

If I have the JdbDateTextField selected, enter a invalid input and then directly click on another tab it still switches the tab. So I was able to provide a wrong input.

My Question is:

Is there a way to perform an Input Verification which does not allow to execute any other event before it is true

Answer 1

The best solution I can think of is to assign the JTabbedPane a custom selection model which refuses to allow changing tabs unless the current InputVerifier succeeds:

int index = tabbedPane.getSelectedIndex();

tabbedPane.setModel(new DefaultSingleSelectionModel() {
    @Override
    public void setSelectedIndex(int index) {
        Component focusOwner =
            FocusManager.getCurrentManager().getFocusOwner();

        if (focusOwner instanceof JComponent) {
            JComponent c = (JComponent) focusOwner;
            InputVerifier verifier = c.getInputVerifier();
            if (verifier != null && !verifier.shouldYieldFocus(c)) {
                return;
            }
        }

        super.setSelectedIndex(index);
    }
});

tabbedPane.setSelectedIndex(index);

Answer 2

I hope that I can do this as an answer:

The solution above works for the JTabbedPane

But I can still select other GUI elements.

My Application is build like this:

For every Person ID I show other Birthdate values in the JTabbedPane and I can still switch to another Person ID if the ValidDateOrEmptyVerifier returns false .

So is there a way to disallow all events in the Main Frame until the ValidDateOrEmptyVerifier returns true .

So Basically what I want is that the user can only exit the "Birthdate" JdbDateTextField if he enters a valid Date or the field is empty.