Add a signal in class that inherited from The QplainTextEdit

[AmrCoder]

I have this class that inherited from QplainTextEdit and I Want to implement a signal function this is the class

#ifndef PLAINTEXTEDIT_H
#define PLAINTEXTEDIT_H

#include <QPlainTextEdit>
#include <QDebug>
#include <QObject>

class PlainTextEdit : public QPlainTextEdit
{
  Q_OBJECT
public:
  PlainTextEdit(QWidget *parent=0);

  bool event(QEvent *event);
signals:
  void CursorChange(int n);
public:
  void SetString(QString s);
private:
  QString str;
};

but i got many undefined reference pointing to function constructor and emit signal part first I got an error so I add the Q_OBJECT to the class but when i add it i got this error

[mrjj]

@AmrCoder

Hi
I don't see any errors?
If you want help to resolve errors we need the actual errors shown :)

[VRonin]

• Did you re-run qmake after adding Q_OBJECT?
• do you have a .cpp file with implementations?

[J.Hilk]

@AmrCoder
hi,

without seeing the actual error messages, I would suggest adding

#include <QWidget>
#include <QEvent>

also could you show us the constructor in your cpp file?