What is the use of " :: " in Qt?

Asked Jan 24 '14 at 04:13

Active Jan 24 '14 at 04:13

Viewed 70 times

I am new to Qt, and was reading some programs. At some places they have used it to refer to a method and at some keyword. So im confused with what exactly is its use?

void CalculatorForm::on_inputSpinBox1_valueChanged(int value){
     outputWidget->setText(QString::number(value + inputSpinBox2->value()));
 }

The above one is a snippet in which a method is used and below one im not getting. So what is exact usage of it and details.

#include "ui_widget.h"
 class MyWidget : public QWidget {
 private:
     Ui::MyWidget m_ui;
 };

Thanks a lot.

asked Jan 24 '14 at 04:13

saarumann

3

It's the scope resolution operator and has nothing to do with Qt in particular. – chris Jan 24 '14 at 04:14
3

You should consider using a [search engine](http://www.google.com/search?q=c%2B%2B+two+colons) in the future. – Jonathon Reinhart Jan 24 '14 at 04:15
To put it in plain language: it's a language feature, not Qt feature. Frank is spot on. – Kuba hasn't forgotten Monica Jan 24 '14 at 12:32

What is the use of " :: " in Qt?

0 Answers0