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Difficulty with Class declaration [message #26090]

Wed, 31 March 2010 18:25

brokndodge
Messages: 8
Registered: March 2010
Location: in front of my computer

Promising Member

I am experienced with GTK-Perl and of course Bash scripting, but those languages simply are not suited for the project I am working on now. I figured since it only took two days to learn perl - I could handle C++ with the help of UPP. Class is giving me some difficulty tho. I can run everything inline, but that would make for a very difficult to maintain source tree. I am trying to break the entire project up into classes for easier maintenance.

My difficulty is in trying to call a member function of a derived class from the base class. I have reviewed various example's and read every resource I can find on classes, references and pointers. I simply do not understand references and pointers.

My first test case is a simple call to a help window. I know there is probably a better way to display a help window, there is a method to my madness here in that I am trying to understand HOW to call a member of a derived class. Most of the functionality of my project will be in these derived classes with only the parent gui being in the base class. I am getting compile errors talking about non-class types and other such with every test I run. I'm not just looking for the answer, I need to understand the why and how of it.

Here is what I'm working with:
main.h

#ifndef _main_main_h_
#define _main_main_h_

#include <CtrlLib/CtrlLib.h>
#include <TabBar/TabBarCtrl.h>
// included Popups.h for complete definition of 
// derived class Popups
#include <main/Popups.h>


using namespace Upp;

#define LAYOUTFILE <main/main.lay>
#include <CtrlCore/lay.h>

//forward declaration of derived class 
class Popups;
// UDMS is my base class
struct UDMS : TopWindow {
	private:
		Popups lilpop;
		void ProspectDetailTab(void);
		
	public:
		typedef UDMS CLASSNAME;
	UDMS();
	
};

#endif //#define _main_main_h_

Popups.h

#ifndef _main_popups_h_
#define _main_popups_h_

#include <main/main.h>

using namespace Upp;

#define LAYOUTFILE <main/popups.lay>
#include <CtrlCore/lay.h>

struct UDMS;
class Popups : UDMS 
{

private:
	
	WithQNHelpLayout<ParentCtrl> qnhelp;
	
	void close();

public:
	typedef Popups CLASSNAME;
	Popups();
	//core gui's
		
	//prospect gui's
	void QNHelpPopup(void);
		
};

#endif //#define _main_popups_h_

main.cpp

#include "main/main.h"
// ommitted 99% of app code to just 
//include the offending function here.

void UDMS::ProspectDetailTab(void)
{
	struct lilpop;
	Popups lilpop;
		
	detail.QNHelpButton.WhenAction = THISBACK(lilpop.QNHelpPopup);

};

Popups.cpp

#include "main/Popups.h"


Popups::Popups()
{	////Title("Unified Dealer Management System").Sizeable();
	//AddFrame(menu);
	
	
	//CtrlLayout(*this, "Unified Dealer Management System");
	CtrlLayout(qnhelp);

};

// this is the member of derived class Popups i'm trying to call
void Popups::QNHelpPopup(void)
{
	

	CtrlLayout(qnhelp);
	
	qnhelp.QNHelpText.SetText(" CCI - Customer Called IN \n"
	" RMC - Returned my Call \n"
	"  NA - No Answer \n"
	"DC1,2,3,w - Phone 1,2,3,work Disconnected \n"
	"LM1,2,3,w  - Left Message on phone 1,2,3,work \n"
	"APPT - Set Appointment (open appointment popup) \n"
	"  AC - Appointment Confirmed \n"
	"  NS - Didn't Show for Appointment \n"
	"KEPT - Kept Appointment \n"
	"  NN - Enter New Note \n"
	"Find - Open Find Prospect Popup");
	
	qnhelp.DoneButton.WhenAction = THISBACK(close); 
	

	
	
};

void Popups::close(void) {
	delete this;
};

errors from mingw when I execute with ctrl+f5

popups.cpp
main.cpp
In file included from C:/MyApps/main/main.h:5,
                 from C:/MyApps/main/Popups.h:4,
                 from C:\MyApps\main\popups.cpp:1:
C:/upp/bazaar/TabBar/TabBarCtrl.h: In constructor `Upp::TabBarCtrl::Item::Item()':
C:/upp/bazaar/TabBar/TabBarCtrl.h:37: warning: converting of negative value `-0x000000001' to `Upp::dword'
In file included from C:/MyApps/main/Popups.h:4,
                 from C:\MyApps\main\popups.cpp:1:
C:/MyApps/main/main.h: At global scope:
C:/MyApps/main/main.h:19: error: field `lilpop' has incomplete type
In file included from C:/MyApps/main/main.h:5,
                 from C:\MyApps\main\main.cpp:1:
C:/upp/bazaar/TabBar/TabBarCtrl.h: In constructor `Upp::TabBarCtrl::Item::Item()':
C:/upp/bazaar/TabBar/TabBarCtrl.h:37: warning: converting of negative value `-0x000000001' to `Upp::dword'
In file included from C:/MyApps/main/main.h:6,
                 from C:\MyApps\main\main.cpp:1:
C:/MyApps/main/Popups.h: At global scope:
C:/MyApps/main/Popups.h:13: error: expected class-name before '{' token
C:\MyApps\main\main.cpp: In member function `void UDMS::ProspectDetailTab()':
C:\MyApps\main\main.cpp:74: error: ISO C++ forbids taking the address of a bound member function to form a po
	inter to member function.  Say `&Popups::QNHelpPopup'
main: 2 file(s) built in (0:04.54), 2274 msecs / file, duration = 4688 msecs, parallelization 100%

There were errors. (0:05.03)

Just like I said previously, I don't just want a solution. I need to understand the why and how. I am learning as fast as I can.

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[Updated on: Wed, 31 March 2010 23:40]

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