No such slot ?

Project try

Hey guys , sorry for asking lots of questions first :(

second , I just finished my midterms " finally " :D , and I wanted to make a little calculator " I'm new so please don't get mad at me :D "

so first I used a class that I used before to to convert to int " the line edit string " , so I added a button and a new line edit which is read only , and I wanted it to display x+y when the user clicks " compute " , the problem is it says no such slot for get_sum() and when I press compute after putting two numbers it doesn't show the answer.

here's the header:

@
#ifndef CHECKCLASS_H
#define CHECKCLASS_H
#include<QLabel>
#include<QHBoxLayout>
#include<QLineEdit>
#include<QIntValidator>
#include<QWidget>
#include<QPushButton>
class checkclass : public QWidget
{
Q_OBJECT
public:
checkclass(QWidget *parent=0);

private slots:

void convert();
    void convert1();
    void get_sum();
private:
    QPushButton *ReturnV;
    QLineEdit *edit;
    QLineEdit *edit1;
    QLineEdit *E;
QIntValidator *Valid;
    QHBoxLayout *left;

    QHBoxLayout *Main;

    int x;
    int y;

};

#endif // CHECKCLASS_H
@

here's the imp:

@
#include "checkclass.h"

checkclass::checkclass(QWidget *parent):
QWidget(){
Valid=new QIntValidator;
edit = new QLineEdit;
edit1=new QLineEdit;
E=new QLineEdit;
ReturnV=new QPushButton;
ReturnV->setText("Compute");
E->setReadOnly(true);

     left= new QHBoxLayout;
     Main=new QHBoxLayout;
        edit->setMaximumWidth(20);
        edit->setFixedWidth(20);
        edit->setValidator(Valid);
        edit1->setMaximumWidth(20);
        edit1->setFixedWidth(20);
        edit1->setValidator(Valid);

        QObject:: connect(edit,SIGNAL(editingFinished()),this,SLOT(convert()));
               QObject:: connect(edit1,SIGNAL(editingFinished()),this,SLOT(convert1()));
               QObject::connect(ReturnV,SIGNAL(clicked()),E,SLOT(get_sum()));
        left->addWidget(edit);

        left->addWidget(edit1);
        left->addWidget(E);
        left->addWidget(ReturnV);
        Main->addLayout(left);


        setLayout(Main);

}

void checkclass::convert(){
QString numbertext=edit->text();
x=numbertext.toInt();

}
void checkclass::convert1(){
QString numbertext=edit1->text();
y=numbertext.toInt();

}
void checkclass::get_sum(){
int z=x+y;
QString textN= QString::number(z);
E->setText(textN);

}
@

Thanks in advance.

hskoglund

Hi, this line:
QObject::connect(ReturnV,SIGNAL(clicked()),E,SLOT(get_sum()));
try change E to this:
QObject::connect(ReturnV,SIGNAL(clicked()),this,SLOT(get_sum()));

Project try

Ah man thanks it worked , but could you explain why my way didn't work ? please :(

hskoglund

Well, it could, but then you have to check, if the E class also has a
slot: void get_sum() declared?

Project try

Ah , thank you ^^