In console how to prevent from going to the next line and read text stream

[amitsgh]

Below is my code for simple signal - slot example, but it seems that when I press enter it move to next line rather than reading the input.

Main.cpp file -

#include <QCoreApplication>

#include "userinteractor.h"
#include "chromebrowser.h"

#include <QObject>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    ChromeBrowser chrome;
    UserInteractor interactor;

    QObject::connect(&interactor, &UserInteractor::phraseTyped, &chrome, &ChromeBrowser::browser);

    interactor.getInput();


    return a.exec();
}

UserInteractor.cpp file -

#include "userinteractor.h"

#include <QDebug>
#include <QTextStream>
#include <QString>

UserInteractor::UserInteractor(QObject *parent)
    : QObject{parent}
{

}

void UserInteractor::getInput() {
    qDebug() << "\nEnter the phrase you are searching for: ";

    QTextStream str(stdin);
    const QString &phrase = str.readLine();

    if (!phrase.isEmpty()) {
        emit phraseTyped(phrase);
    }
}

userinteractor.h file -

#ifndef USERINTERACTOR_H
#define USERINTERACTOR_H

#include <QObject>
#include <QTextStream>

class UserInteractor : public QObject
{
    Q_OBJECT
public:
    explicit UserInteractor(QObject *parent = nullptr);
    void getInput();

signals:
    void phraseTyped(const QString &phrase);
};

#endif // USERINTERACTOR_H

ChromeBrowser.cpp file -

#include "chromebrowser.h"

#include <QDebug>

ChromeBrowser::ChromeBrowser(QObject *parent)
    : QObject{parent}
{

}

void ChromeBrowser::browser(const QString &phrase) {
    qDebug() << "\nThe result for " << phrase << " are - "
             << "\n Result 1"
             << "\n Result 2"
             << "\n Result 3";

}

chromebrowser.h file -

#ifndef CHROMEBROWSER_H
#define CHROMEBROWSER_H

#include <QObject>
#include <QString>

class ChromeBrowser : public QObject
{
    Q_OBJECT
public:
    explicit ChromeBrowser(QObject *parent = nullptr);

public slots:
    void browser(const QString &phrase);

};

#endif // CHROMEBROWSER_H

Console -

Here, I have pressed enter so many times but still no result is displayed.

[ChrisW67]

@amitsgh So, have you checked that your signal is being emitted?

This line:

const QString &phrase = str.readLine();

is probably not what you think it is. QTextStream::readline() returns a QString

BTW: Do you get compiler warnings compiling UserInteractor.cpp?

[amitsgh]

@ChrisW67 I think I got it, actually earlier it was opening the Application output console, I just clicked the option of run in terminal in the build & run option and now it's working fine.