ERROR QObject::connect: No such slot MainWindow::Inventory(const QString&)

isan

I was wrote simple code but I have this error :
ERROR: QObject::connect: No such slot MainWindow::Inventory(const QString&)

thread class:

//.h:
#ifndef MYTHREAD_H
#define MYTHREAD_H

#include <QThread>
#include <QMutex>
#include <serial.h>

class MyThread : public QThread
{
   Q_OBJECT

public slots:
    void stopRunning();

protected:
   virtual void run();

signals:
   void signalValueUpdated(QString);

private:
    bool isRunning;
    Serial sTest;

};
#endif

//.cpp:
#include "MyThread.h"
#include <QString>
#include "Serial.h"
#include <QDebug>
#include <QImage>
#include <QPixmap>


void MyThread::run()
{
    qDebug("Thread id inside run %d",(int)QThread::currentThreadId());

    isRunning = 1;

    uint8_t Cmd[] ={0x05, 0x07, 0xFF, 0xF0, 0x01,0x00, 0x6A, 0x50};

    sTest.Openport();

    while(isRunning == 1)
    {
        if (sTest.OpenFlag){

        QString string = sTest.RxTx(Cmd);

        msleep(1);

        emit signalValueUpdated(string);
        }
    }
}

void MyThread::stopRunning()
{
    isRunning = 0;
    sTest.ClosePort();

}

mainwindow class:

//.h:
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include "MyThread.h"
#include <QDebug>
namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

    void Inventory(QString response);

private:
    Ui::MainWindow *ui;
    MyThread thread;

};

#endif // MAINWINDOW_H
#ifndef MAINWINDOW_H
#define MAINWINDOW_H

//.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QObject::connect(ui->startBut,SIGNAL(clicked()),&thread,SLOT(start()), Qt::QueuedConnection);
    QObject::connect(ui->stopBut,SIGNAL(clicked()),&thread,SLOT(stopRunning()), Qt::QueuedConnection);
    QObject::connect(&thread,SIGNAL(signalValueUpdated(const QString&)),this,SLOT(Inventory(const QString&)), Qt::QueuedConnection);



}

MainWindow::~MainWindow()
{
    delete ui;
}

void  MainWindow::Inventory(QString response)
{

    if(response=="c"){
     //
   ///
}


}

mrjj

Hi
You are using a mix of QString and const QString &
Make sure the signal and slot are 100% the same

isan

@mrjj Hi
I edited it and set all to QString but I still get this error when run the program

in main window:

//.h: 
void Inventory(QString response);
//.cpp:
QObject::connect(&thread,SIGNAL(signalValueUpdated(QString)),this,SLOT(Inventory( QString)), Qt::QueuedConnection);


void  MainWindow::Inventory(QString response)
{
/// 
//
}

in thread :

//.h:
void signalValueUpdated(QString);
//.cpp:
QString string;
emit signalValueUpdated(string);

mrjj

@isan
Hi
Try to delete your build folder and then run rebuild all.
Seems ok now.

isan

@mrjj I did this, but it didn't make any difference

QObject::connect: No such slot MainWindow::Inventory( QString) in ..\Inv\mainwindow.cpp:12
QObject::connect:  (receiver name: 'MainWindow')

Gerhard

In mainwindow.h try :
protected Slots:
void Inventory(QString response);

isan

@gerhard tnx