As the title stands I get this error within content of this snippet:
class NewTaskDialog : public QDialog It was working just fine earlier, but error started showing up when I added method:
void MainWindow::saveButtonClicked(NewTaskDialog dialogWindow) Your syntax for saveButtonClicked creates a copy of the NewTaskDialog that's passed to it. You can't copy QWidgets unless you create a cloning function that explicitly provides the exact functionality you seek. QWidget's constructor is private.
You must pass a pointer
void MainWindow::saveButtonClicked(NewTaskDialog* dialogWindow) or a reference. Using the pointer is the standard Qt way.
Use a pointer to the QDialog instead. The QDialog class has the copy constructor defined as private to try prevent you from passing a QDialog by value since you should never do that.
