I want to do specific things after focus is lost on lineedit1. Here is the code piece from the application:
QFocusEvent* focuslost = new QFocusEvent(QEvent::FocusOut); void lineedit1::focusOutEvent(focuslost) { //do something } but it gives me compiler error:
error: name followed by "::" must be a class or namespace name
What can I do to implement such a function?
You cannot just override a method on an instance of an object, you need to create a new class that inherits from QLineEdit and overrides the method focusOutEvent:
mylineedit.h
class MyLineEdit : public QLineEdit { protected: void focusOutEvent(QFocusEvent * e) override; } mylineedit.cpp
void MyLineEdit::focusOutEvent(QFocusEvent * e) { // your code here QLineEdit::focusOutEvent(e); } Then declare lineedit1 as MyLineEdit* lineedit1
