Beginners problem: display a dialog

[dev_null815]

Hi,

I'm new to Qt, so please be patient with a probably simple question. I'm trying to show a (modal) dialog when a button is pressed in my main window. This is based on QWidget and displayed with .showFullScreen().
The Dialog was created with the dialog designer of Qt Creator. In the slot function which is called when the button is pressed, I instantiate an object from the class created by the designer. I expected to be able to display it by simply calling its .exec() method. But I found that I have to first hide my main window to be able to see the dialog. But there should be a way to have the dialog simply appear on top of the main window.

Can anyone tell me what I'm missing here?

[danhicksbyron]

Maybe you need to show() the dialog?

[dev_null815]

Sorry, I forgot to mention this. Of course, I did call the .show() method of the dialog before doing the .exec().
But it only appears when I hide the main window.

[divanov]

Did you parent a dialog to the main window?

[dev_null815]

Damn, I knew it would be some really stupid mistake.
Of course I omitted the parent parameter, so it defaulted to null.

Thank you very much for this quick diagnosis of my problem.