Split header files

[Stefanoxjx]

Hi, I would like to ask what is the better way to split header file?
I've a class with many QStringList and Enum very long.
This situation makes working in this file difficult and I would like to split in some specific files.
At the moment I've created simple headers file and included in code like this:

#include <QObject>
#include <QWidget>

class MyClass : public QWidget
{
    Q_OBJECT

#include "file1.h"
#include "file2.h"
#include "file3.h"

public:
    explicit MyClass(QWidget *parent = nullptr);
...

I know that it isn't a good practice but at the moment to make my life easier I did so.
I thought maybe the correct way to do this can be create a new class (only header) and inherit this in my class.
But I've a doubt that this too isn't a correct way.
Can you suggest me what can be the correct method to do this?
Thanks.

[jsulm]

@Stefanoxjx Hard to say without knowing what this class is doing.
You should think about your architecture and design. Inheritance and composition can also help to make classes smaller.

[Stefanoxjx]

@jsulm So you confirm that creating smal classes with only header files and inherithing them is the better way?

[jsulm]

@Stefanoxjx It really depends. Besides inheritance there is also composition. What is better depends on the use case.

[Stefanoxjx]

@jsulm Many thanks for your help :)