Tabs communication

[therealjag]

hey there, i have created 4 tabs in my program but they dont seem to communicate with each other by this i mean like i have this method in my third tab:

int DesignTab::tariffReturn()
{
	return tariff1->currentIndex();
}

int DesignTab::tariffReturn()
{
	return tariff1->currentIndex();
}

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but when i try calling it from my 4th tab using DesignTab.tariffReturn( ) it gives an error when compiling saying the following:

"expected primary expression before '.' token"

does anyone know how i can call this method? or pass the value into my last tab?

[jacek]

Could you post the line in which this error occurs?

[therealjag]

yeah sure here it is:

if(DesignTab.tariffReturn() == 5)	//period of rental is 5 year
	{
		cYear5->setText("");
	}

if(DesignTab.tariffReturn() == 5)	//period of rental is 5 year
	{
		cYear5->setText("");
	}

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[Chicken Blood Machine]

Is DesignTab a pointer? show how it is declared.

[therealjag]

design tab is just the name of the tab constructor - heres me header file below:

class CreatorTab : public QWidget
{
	Q_OBJECT
 
public:
	CreatorTab(const QFileInfo &fileInfo, QWidget *parent = 0);
 
private:
	Drawer *draw;
 
};
 
 
class DemandsTab : public QWidget
{
    Q_OBJECT
 
 
public:
    DemandsTab(const QFileInfo &fileInfo, QWidget *parent = 0);
 
 
 
private slots:
 
	void obtain_values(QTableWidgetItem *items);
	void random();
   void tableSize();
 
private:		
 
		void randGen(QTableWidgetItem *items);
		void changeSize(QTableWidgetItem *items);
 
		QTableWidget *demands;
 
};
 
 
class DesignTab : public QWidget
{
    Q_OBJECT
 
public:
    DesignTab(const QFileInfo &fileInfo, QWidget *parent = 0);
 
 
private slots:
    void network_cost();
	void tariffChosen();
 
 
private:
	void n_cost();
	int BTSelected();
	int FranceSelected();
	int BelgSelected();
	int ItaliaSelected();
 
	int BTPath();
	int FrancePath();
	int BelgPath();
	int ItaliaPath();
 
	int tariffReturn();
 
	int isChecked;
                QLineEdit *display;
	QLineEdit *display2;
	QLineEdit *display3;
 
	QComboBox *tariff1;
 
	QTableWidget *tariff;
 
	QLabel *belgNote;
 
	QRadioButton *radio1;
    QRadioButton *radio2;
};
 
 
class PriceTab : public QWidget
{
    Q_OBJECT
 
public:
    PriceTab(const QFileInfo &fileInfo, QWidget *parent = 0);
 
private slots:
	void rentalCost();
	void priceSlot();
 
 
private:
 
	QLabel *price;
 
	QLineEdit *initialCost;
    QLineEdit *cYear1, *cYear2, *cYear3, *cYear4, *cYear5;
    QLineEdit *rYear1, *rYear2, *rYear3, *rYear4, *rYear5;
 
 
};
 
 
class TabDialog : public QDialog
{
    Q_OBJECT
 
public:
    TabDialog(const QString &fileName, QWidget *parent = 0);
 
 
 
private:
	QTabWidget *tabWidget;
 
    	void createActions();
    	void createMenu();
};
 
 
 
 
#endif

class CreatorTab : public QWidget
{
	Q_OBJECT
	
public:
	CreatorTab(const QFileInfo &fileInfo, QWidget *parent = 0);

private:
	Drawer *draw;

};


class DemandsTab : public QWidget
{
    Q_OBJECT
    

public:
    DemandsTab(const QFileInfo &fileInfo, QWidget *parent = 0);
		


private slots:
	
	void obtain_values(QTableWidgetItem *items);
	void random();
   void tableSize();
		
private:		

		void randGen(QTableWidgetItem *items);
		void changeSize(QTableWidgetItem *items);

		QTableWidget *demands;
		
};


class DesignTab : public QWidget
{
    Q_OBJECT

public:
    DesignTab(const QFileInfo &fileInfo, QWidget *parent = 0);
	
    
private slots:
    void network_cost();
	void tariffChosen();
	

private:
	void n_cost();
	int BTSelected();
	int FranceSelected();
	int BelgSelected();
	int ItaliaSelected();

	int BTPath();
	int FrancePath();
	int BelgPath();
	int ItaliaPath();

	int tariffReturn();

	int isChecked;
                QLineEdit *display;
	QLineEdit *display2;
	QLineEdit *display3;

	QComboBox *tariff1;

	QTableWidget *tariff;

	QLabel *belgNote;

	QRadioButton *radio1;
    QRadioButton *radio2;
};


class PriceTab : public QWidget
{
    Q_OBJECT

public:
    PriceTab(const QFileInfo &fileInfo, QWidget *parent = 0);

private slots:
	void rentalCost();
	void priceSlot();


private:

	QLabel *price;

	QLineEdit *initialCost;
    QLineEdit *cYear1, *cYear2, *cYear3, *cYear4, *cYear5;
    QLineEdit *rYear1, *rYear2, *rYear3, *rYear4, *rYear5;


};


class TabDialog : public QDialog
{
    Q_OBJECT

public:
    TabDialog(const QString &fileName, QWidget *parent = 0);



private:
	QTabWidget *tabWidget;

    	void createActions();
    	void createMenu();
};




#endif

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[Chicken Blood Machine]

Well thats the problem. You can't call a member function on the class name. You must have an instance of the class. Your code should be:

// Actually create the tab somewhere
DesignTab tab = new DesignTab(...);
...
if (tab->tariffReturn() == 5)   //period of rental is 5 year
{
    cYear5->setText("");
}

// Actually create the tab somewhere
DesignTab tab = new DesignTab(...);
...
if (tab->tariffReturn() == 5)   //period of rental is 5 year
{
    cYear5->setText("");
}

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[therealjag]

cheers mate ur a life saver, i tried doing that before aswell but i guess my syntax was wrong!