Java: What is the property of a JOptionPane object that prevents clicks below itself?

Question

I have created my own JOptionPane using a JDialog, but I can't seem to replicate the behavior of a typical JOptionPane that disallows the user from clicking anywhere but the JOptionPane window.

What property of JOptionPane do I need to replicate with a JDialog so that I can mimic this behavior? (I am aware that JOptionPanes are simply specialized JDialogs, as you can see if look at the JOptionPane class source code).

Answer 1

The Swing API to set the modality of a JDialog is one of the constructors with Dialog.ModalityType as argument.

• JDialog(Window owner, Dialog.ModalityType modalityType)
• JDialog(Window owner, String title, Dialog.ModalityType modalityType)
• JDialog(Window owner, String title, Dialog.ModalityType modalityType, GraphicsConfiguration gc)

To set the modality after creation: java.awt.setModalityType()

To get the modality, use java.awt.Dialog.getModalityType()

The old fashion way is to use a boolean (other constructors).

Sometimes we want to exclude some Windows from the modality with java.awt.setModalExclusionType() (rarely used)