Best way QDialog should communicate with MainWindow?
I have a QDialog with 2 buttons. One button performs an operation and the other is a cancel button. The button the performs an operation, emits a signal then closes the dialog.
I want to know which of the two buttons was clicked when the QDialog closes and control returns to MainWindow. I read in other posts that the QDialog should not be messing with variable created in its parent, MainWindow.
Hi, I believe the Cancel button returns QDialog::Rejected; I recommend that you have your other button do its stuff then call accept(); Thus returning either QDialog::Accepted or QDialog::Rejected.
So in your code you could do as
result = dialog.exec();
Then result will either be Accepted or Rejected depending on the button pressed.
QDialog::Accept and QDialog::Reject are the built-in result types, as @Chrisw01 mentioned.
If you want more customized options you can use any integer value with done(). Create a public enum in your dialog class with the options and then connect your buttons to slots that call
done()with that enum values.
A user of your dialog can then call
exec()and inspect the return value by comparing it to the enum values.