A problem in QT

1: This is a problem I encountered when reading a PDF of QT. The Code is as follows:

 

Mydlg my1;
If(my1.exe C () = qdialog: accepted)
{
W. Show ();
Return a.exe C ();
}

 

There is a button on my1, W is a widget, And the clicked signal of the button corresponds to the notify T () slot of my1. I can't understand this sentence after learning QT.

Now, the idea is almost plain. In this case, my1.exe C () indicates that my1 enters the modal mode. Show(writable parameters is a non-modeled mode. When my1.exe C needs to return, it can only accept the returned accept. Now it seems that accept is a built-in function and variable of qdialog.

What exec sees is that it enters the message loop state. This is probably the case. my1 enters the mode and waits for message processing. if it receives :: if accept is used, the corresponding event has occurred.