C++ Inheriting problem
I got problems with some classes in C++. Here is the situation:
in main.h
Code:
class CMain
{
protected:
virtual char *GetPassword(void *p) = 0;
virtual bool YesNoBox(const char *str, ...) = 0;
virtual int ChoiceBox(const char *button1, const char *button2, const char *button3,
const char *title, ...) = 0;
public:
virtual ~CMain(void) { };
virtual void Init(int argc, char *argv[]) { };
};
class CBaseInstall: public CMain
{
// Some functions that use functions from CMain
};
in fltk.h:
Code:
class CFLTKBase: public CMain
{
Fl_Window *m_pAboutWindow;
Fl_Return_Button *m_pAboutOKButton;
protected:
Fl_Window *m_pMainWindow;
Fl_Button *m_pAboutButton;
char *GetPassword(void *p) { };
virtual bool YesNoBox(const char *str, ...) { };
virtual int ChoiceBox(const char *button1, const char *button2, const char *button3,
const char *title, ...) { };
// ....
};
class CInstaller: public CFLTKBase, public CBaseInstall
{
Fl_Wizard *m_pWizard;
std::list<CBaseScreen *> m_ScreenList;
protected:
virtual void AddStatusText(const std::string) = 0;
virtual void SetProgress(int percent) = 0;
// ...
};
Problem: I can't use CInstaller since the compiler complains about that GetPassword(), YesNoBox() and ChoiceBox() aren't defined.
What I want: I want that the compiler uses those functions from CFLTKBase.
The only way I know is to define those functions in CInstaller anyway and point them to the ones from CFLTKBase, but that feels a bit hakish :)
So if anyone knows a better way...
[EDIT]
Yay fixed it :ph34r: ... guess this thread was a bit useless.
Solution: change 'public CMain' to 'virtual public CMain' for both classes so that they use the same CMain(atleast thats what I understand from it).
[/EDIT] |
