Qt_IM_54 - 8BitsCoding/RobotMentor GitHub Wiki

#include <QtCore/QCoreApplication>

#include <qdebug.h>
#include <qmetaobject.h>
#include <qmetatype.h>

#include "person.h"

/*
	Builder design pattern
	Build things in a uniform way = milliions of ways to do this.
*/

int main(int argc, char *argv[])
{
	QCoreApplication a(argc, argv);

	QObject classroom;
	QMetaEnum metaEnum = QMetaEnum::fromType<person::persontype>();

	for (int i = 0; i < 10; i++) {
		person::persontype type = person::persontype::STUDENT;
		if (i == 0) type = person::persontype::PRINCIPAL;
		if(i == 1) type = person::persontype::TEACHER;
	
		person* p = person::build(type);
		p->setParent(&classroom);
	}

	foreach(QObject * child, classroom.children()) {
		person* p = qobject_cast<person*>(child);
		if (p) qInfo() << p << " is a " << metaEnum.valueToKey(p->role());
	}

	return a.exec();
}

// person.h
#pragma once

#include <QObject>

class person : public QObject
{
	Q_OBJECT

public:
	enum persontype { PRINCIPAL, TEACHER, STUDENT };
	Q_ENUM(persontype)

	static person* build(persontype type);
	persontype role();

	explicit person(QObject *parent = nullptr);
	~person();

private:
	persontype m_type;
};

// person.cpp
#include "person.h"

person::person(QObject *parent)
	: QObject(parent)
{
}

person::~person()
{
}

person* person::build(persontype type)
{
	person* p = new person(nullptr);
	p->m_type = type;

	return p;
}

person::persontype person::role()
{
	return m_type;
};