Question

I want to create a Qt popup window which will behave like a message box in Qt. That means the rest of the GUI must blocked until that popup window is dismissed. This may be a child question, but can anyone pls help me with this ?

Thanks… 🙂

Edit:

I want to use forms, labels, buttons and some other widget types in that popup window.

Answer 1

Modal Dialogs

A modal dialog is a dialog that blocks
input to other visible windows in the
same application. Users must finish
interacting with the dialog and close
it before they can access any other
window in the application. Dialogs
that are used to request a file name
from the user or that are used to set
application preferences are usually
modal.

The most common way to display a modal
dialog is to call its exec() function.
When the user closes the dialog,
exec() will provide a useful return
value. Typically, to get the dialog to
close and return the appropriate
value, we connect a default button,
e.g. “OK”, to the accept() slot and a
“Cancel” button to the reject() slot.
Alternatively you can call the done()
slot with Accepted or Rejected.

An alternative is to call
setModal(true) or setWindowModality(),
then show(). Unlike exec(), show()
returns control to the caller
immediately. Calling setModal(true) is
especially useful for progress
dialogs, where the user must have the
ability to interact with the dialog,
e.g. to cancel a long running
operation. If you use show() and
setModal(true) together to perform a
long operation, you must call
QApplication::processEvents()
periodically during processing to
enable the user to interact with the
dialog. (See QProgressDialog.)