Moving widgets

krzysieklfc

I want to move child popup QDialog in sync with its parent. I did the following:

void UI::moveEvent(QMoveEvent* event)

{
	if (notificationDialog) {
		auto e = dynamic_cast<QMoveEvent*>(event);

		auto oldPos = e->oldPos();
		auto newPos = e->pos();

		notificationDialog->move(notificationDialog->pos() + (newPos -= oldPos));
	}
	
	return QMainWindow::moveEvent(event);
}

It sort of works when I move the QMainWindow very gently, but when I move it faster the dialog offsets a bit from the expected position. It's like moveEvent isn't being properly called .

Does anyone know why is that?

Kent-Dorfman

I think this is because you are using a relative offset based on new-old values...mouse movements can be greater than one pixel at a time. Perhaps try using absolute positioning logic instead of relative.

jsulm

@krzysieklfc said in Moving widgets:

newPos -= oldPos

Why do you have an assignment here?