inheritance in Qt won't allow me to reference? - c++

Question

So I I have an h file and a cpp file in a Qt project. I have to declare some qstrings inside my header file and I would like to reference them in my cpp file but I don't seem to be able to access it, can someone explain why or the correct way to do it?
#ifndef PROFILE_H
#define PROFILE_H
#include <QMainWindow>
#include "login.h"
#include "searchnote.h"
#include "note.h"
#include <QDebug>
namespace Ui {
class Profile;
}
class Profile : public QMainWindow
{
Q_OBJECT
public:
explicit Profile(QWidget *parent = 0);
~Profile();
private slots:
void on_actionAdd_Note_triggered();
private:
Ui::Profile *ui;
private:
QString name;
QString major;
QString school;
Note myNoteList;
};
#endif // PROFILE_H
#include "profile.h"
#include "ui_profile.h"
Profile::Profile(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::Profile)
{
ui->setupUi(this);
}
Profile::~Profile()
{
delete ui;
}
void Profile::on_actionAdd_Note_triggered()
{
SearchNote openSearch; //will send us the searchNote gui
openSearch.setModal(true);
openSearch.exec();
}
void myNoteListAdd(QString newName){
myNoteList.add(); //the cpp file doesnt recognize this object
}

Answer 1

myNoteListAdd is a stand-alone function, myNoteList is a private data member of Profile class.
Only member functions (often also called methods) of the same class can access these private data members

Answer 2

It may be the case that you intend myNoteListAdd to be a member function of Profile, i.e.
class Profile : public QMainWindow
{
Q_OBJECT
public:
explicit Profile(QWidget *parent = 0);
~Profile();
private slots:
void on_actionAdd_Note_triggered();
**void myNoteListAdd(QString newName);**
private:
Ui::Profile *ui;
private:
QString name;
QString major;
QString school;
Note myNoteList;
};
And implement as:
void Profile::myNoteListAdd(QString newName){
myNoteList.add(newName); // assuming you want to add newName to myNoteList
}
Otherwise, you need some form of accessing the member myNoteList, either by making it public or having a getter member. In either case you need an instance of a Profile to work with, i.e.:
class Profile : public QMainWindow
{
Q_OBJECT
public:
explicit Profile(QWidget *parent = 0);
~Profile();
//either this:
Note myPublicNoteList;
// or this
Note getNoteList() { return myNoteList; }
private slots:
void on_actionAdd_Note_triggered();
private:
Ui::Profile *ui;
private:
QString name;
QString major;
QString school;
};
then in your .cpp
void myNoteListAdd(QString newName)
{
Profile p = new Profile(); // or some other mechanism to get a Profile
//then either
p.myPublicNoteList.add(newName);
// or
p->getNoteList().add(newName);
}