Hi guys,

I'm busy to program a little bit more OOP in c++.
But I'm stuck with my first OOP look a like script.

The idea is a factory pattern, I have one abstract interface abstractOrderRecord.h
And a child class orderAddRecord.h and in the future order.h and some other.

This is abstractOrderRecord.h
Qt Code: 
  1. #ifndef ORDERRECORD_H
  2. #define ORDERRECORD_H
  3.  
  4. #include <QObject>
  5.  
  6. class QDate;
  8. class QString;
  9.  
  10. struct article {
  11. 	QString description, customization, nr;
  12. 	int ordered, delivered;
  13. 	float price;
  14. 	QDate *warrentyDate;
  15. };
  16.  
  17. class OrderRecord : public QObject
  18. {
  19. 	Q_OBJECT
  20. public:
  21. 	//set methods
  22. 	virtual void setOrderId(const int);
  23. 	virtual void setCid(const int);
  24. 	virtual void setDeadline(const QDate );
  25. 	virtual void setPrepayment(const float);
  26. 	virtual void setPreviousState(const int);
  27. 	virtual void setCurrentState(const int);
  28. 	virtual void addArticle(const QString, const QString, const QString, const float, const int, const int, const QDate);
  29. 	virtual void addArticle(const struct article);
  30.  
  31. 	//accessors
  32. 	virtual int getOrderId();
  33. 	virtual int getCid();
  34. 	virtual QDate getDeadline();
  35. 	virtual float getPrepayment();
  36. 	virtual int getPreviousState();
  37. 	virtual int getCurrentState();
  38. 	virtual article getArticle(int);
  39.  
  40. };
  41.  
  42. #endif
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This is orderAddRecord.h
Qt Code: 
  1. #ifndef ORDERADDRECORD_H
  2. #define ORDERADDRECORD_H
  3.  
  4. #include <QObject>
  5. #include <QWidget>
  6.  
  7. #include "AbstractOrderRecord.h"
  8.  
  9. class QDate;
  11.  
  12. class OrderAddRecord : public QObject,  public virtual OrderRecord {
  13. 	Q_OBJECT
  14. public:
  15. 	OrderAddRecord(QWidget *parent = 0);
  16. 	void setOrderId(const int);
  17. 	void setCid(const int);
  18. 	void setDeadline(const QDate);
  19. 	void setPrepayment(const float);
  20. 	void setPreviousState(const int);
  21. 	void setCurrentState(const int);
  22. 	void addArticle(const struct article);
  23. 	void addArticle(const QString, const QString, const QString, const float, const int, const int, const QDate);
  24.  
  25. private:
  26. 	int orderId;
  27. 	int cid;
  28. 	QDate *deadline;
  29. 	float prepayment;
  30. 	int previousState;
  31. 	int currentState;
  32. 	QStringList *articles;
  33. };
  34.  
  35. #endif
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This is orderAddRecord.cpp
Qt Code: 
  1. #include "orderAddRecord.h"
  2. #include <QtCore>
  3.  
  4.  
  5.  
  6. OrderAddRecord::OrderAddRecord(QWidget *parent)
  7. 	: QObject(parent)
  8. {
  9. 	this->deadline = new QDate();
  10. 	this->articles = new QStringList();
  11. }
  12.  
  13. void OrderAddRecord::setOrderId(const int orderId)
  14. {
  15. 	this->orderId = orderId;
  16. }
  17.  
  18. void OrderAddRecord::setCid(const int cid)
  19. {
  20. 	this->cid = cid;
  21. }
  22.  
  23. void OrderAddRecord::setDeadline(const QDate deadline)
  24. {
  25. 	this->deadline = deadline;
  26. }
  27.  
  28. void OrderAddRecord::setPrepayment(const float amount)
  29. {
  30. 	this->prepayment = amount;
  31. }
  32.  
  33. void OrderAddRecord::setPreviousState(const int state)
  34. {
  35. 	this->previousState = state;
  36. }
  37.  
  38. void OrderAddRecord::setCurrentState(const int state)
  39. {
  40. 	this->currentState = state;
  41. }
  42.  
  43. void OrderAddRecord::addArticles(const struct article Article)
  44. {
  45. 	this->articles << Article;
  46. }
  47.  
  48. void OrderAddRecord::addArticles(const QString description, const QString nr, const QString customization, const float price, const int delivered, const int ordered, const QDate &warrentyDate)
  49. {
  50. 	article tmpArticle;
  51. 	tmpArticle.description		= description;
  52. 	tmpArticle.nr				= nr;
  53. 	tmpArticle.customization	= customization;
  54. 	tmpArticle.price			= price;
  55. 	tmpArticle.delivered		= delivered;
  56. 	tmpArticle.ordered			= ordered;
  57. 	tmpArticle.warrentyDate		= new QDate();
  58. 	tmpArticle.warrentyDate		= warrentyDate;
  59.  
  60. 	this->articles << tmpArticle;
  61.  
  62. }
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And this is the error I get over and over again.
warning: direct base 'QObject' inaccessible in 'OrderAddRecord' due to ambiguity
error: cannot convert 'const QDate' to 'QDate*' in assignment
error: no 'void OrderAddRecord::addArticles(article)' member function declared in class 'OrderAddRecord'
error: no match for 'operator<<' in '((OrderAddRecord*)this)->OrderAddRecord::articles << Article'
error: prototype for 'void OrderAddRecord::addArticles(QString, QString, QString, float, int, int, const QDate&)' does not match any in class 'OrderAddRecord'
error: candidate is: void OrderAddRecord::addArticles(article)
error: cannot convert 'const QDate' to 'QDate*' in assignment
error: no match for 'operator<<' in '((OrderAddRecord*)this)->OrderAddRecord::articles << tmpArticle'
So I'm doing something terrible wrong.
After I changed the warrentyDate to *warrentyDate in the structure definition I got an error less to worry about.

So I assume that QDate variables has to be an pointer, but how can I copy the QDate passed in the function to the local warrentyDate or deadline variable.

And I can't get the structure working in the function, does somebody know how to pass structures as arguments in a function?

Many thanks,

Cyberboy