Thread: QT error multiple declarations?

Im trying to create a fail safe integer input in QT but am getting some errors.
If my code is way off the ball park let me know with your coments

Code:

#ifndef QTINTEGERINPUT_H
#define QTINTEGERINPUT_H
#include <qwidget.h>
#include <qlineedit.h>

class QTIntegerInput : public QWidget
{
        Q_OBJECT
  public:   
    QTIntegerInput(QWidget * parent);

  private:
    int valid_integer;
    QLineEdit *number_box;

  signals:
    void handle_overflow(const QString & unvalidated_integer);

   private slots:
    void overflow();
    
   public:
    int get_integer(); 
     
};
#endif

next the implementation

Code:

#include <iostream>
using std::cerr;

#include <qlayout.h>
#include <qlabel.h>

#include <qvalidator.h>
#include <qwidget.h>
#include "QTIntegerInput.h"

QTIntegerInput::QTIntegerInput(QWidget * parent) : QWidget(parent)
{
  QHBoxLayout *input_layout_box = new QHBoxLayout(this);
  
  QLabel *label = new QLabel(tr("Please &enter an integer:"),this);
  label->setAutoResize(true);
  
  number_box = new QLineEdit(this);

  QRegExp isDigit("[0-9]{16}");
  number_box->setValidator(new QRegExpValidator(isDigit,number_box));
  
  label->setBuddy(number_box);
   
  input_layout_box->addWidget(label);
  input_layout_box->addWidget(number_box);
  //input_layout_box->show();
  
  QObject::connect(number_box, SIGNAL(returnPressed()),this, SLOT(overflow()));

}
void QTIntegerInput::overflow()
 {
    
    try
    {
      bool ok;
      int unvalidated_integer = number_box->text().toInt( &ok, 10 );     // dec == 0, ok == FALS
      if (ok==FALSE) throw "overflow exception";
      valid_integer = unvalidated_integer;

    }
    catch (char * exception)
    {
      emit handle_overflow(number_box->text());
    }
 }
   ;
void QTIntegerInput::handle_overflow(const QString &unvalidated){ cerr << "Overflow";}
int QTIntegerInput::get_integer(){return 0;}

errors:
moc_QTIntegerInput.o(.text+0x1ec): In function `QTIntegerInput::handle_overflow(QString const&)':
/home/curlious/qtenternumber/src/moc_QTIntegerInput.cpp:87: multiple definition of `QTIntegerInput::handle_overflow(QString const&)'
QTIntegerInput.o(.text+0x0):/usr/lib64/qt-3.3/include/qglist.h:150: first defined here
/usr/bin/ld: Warning: size of symbol `QTIntegerInput::handle_overflow(QString const&)' changed from 15 in QTIntegerInput.o to 112 in moc_QTIntegerInput.o
collect2: ld returned 1 exit status
gmake[1]: *** [../bin/qtenternumber] Error 1
gmake: *** [sub-src] Error 2
*** Exited with status: 2 ***

I looked at that header file and it seems totally unrelated.

I found the problem. You do not define a routine for a signal. I changed my signal to throw_overflow then created a slot handle_overflow for which there is an exception.

You may wonder why I just didn't handle this in the catch clause of overflow. I am thinking that I will add a dialog and this would be to much in a simple catch clause.

Thanks Salem for getting me to look at this deeper.