Question

I have a JInternalFrame window that needs to popup a modal dialog box when a JButton is pressed. At first, I tried using JDialog, but I found that JDialog constructor needs:

1. JFrame
2. boolean modal

I tried passing JInternalFrame to it, but the type didn’t match.

Should I use JDialog with JInternalFrame? What if I dont specify the owner (i.e. passing a null)? Is there anything wrong with that?

Answer 1

SwingUtilities.getAncestorOfClass(Window.class, myButton)

The abvove method will return the Window that contains your button.
Once you have it you can pass it to the constructor of the dialog 🙂

EDIT1:
I misread the question I guess. How can you have a JinternalFrame as the topmost window??

EDIT2:
Also if you pass null to Jdialog constrcutor then by default it uses a shared owner i.e SwingUtilities.getSharedOwnerFrame()