Need help in getting data after pressing pushbutton

doforumda

hi
i am working on simple example. I have three pushbuttons and one lineEdit. all pushButtons have these Names (zeroButton, oneButton and threeButton). What i want is when the user press 0 then it should display that zero in LineEdit and when user press 1 or 2 then it should appear in lineEdit. the name of lineEdit is display. here is my code but it is not working. when i press any button it does not appear in lineEdit

dialog.h
@
#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
Q_OBJECT

public:
explicit Dialog(QWidget *parent = 0);
~Dialog();
public slots:
void changeValue();

private:
Ui::Dialog *ui;
};

#endif // DIALOG_H
@

dialog.cpp
@
#include "dialog.h"
#include "ui_dialog.h"

Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
connect(ui->zeroButton, SIGNAL(clicked()), this, SLOT(changeValue()));
connect(ui->oneButton, SIGNAL(clicked()), this, SLOT(changeValue()));
connect(ui->twoButton, SIGNAL(clicked()), this, SLOT(changeValue()));
}

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

void Dialog::changeValue()
{
int numZero = ui->zeroButton->text().toInt();
int numOne = ui->zeroButton->text().toInt();
int numTwo = ui->zeroButton->text().toInt();

QString resultNum = "";

if(numZero)
    ui->display->setText(resultNum.setNum(numZero));

if(numOne)
    ui->display->setText(resultNum.setNum(numOne));

if(numTwo)
    ui->display->setText(resultNum.setNum(numTwo));

}
@

main.cpp
@
#include <QtGui/QApplication>
#include "dialog.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Dialog w;
w.show();

return a.exec&#40;&#41;;

}
@
how can i achieve this?

alexman

Try this code:
@
void Dialog::changeValue()
{
if ( sender() == ui->zeroButton ) {
ui->display->setText( ui->zeroButton->text() );
} else if ( sender() == ui->oneButton ) {
ui->display->setText( ui->oneButton->text() );
} else if ( sender() == ui->twoButton ) {
ui->display->setText( ui->twoButton->text() );
}
}
@

tobias.hunger

This looks like a great place to use a "QSignalMapper":http://doc.trolltech.com/4.7/qsignalmapper.html.