Trouble With Class in Custom Framework

Nick

Sage

Posts: 1,066
Joined: 2004.07

Post: #1

Nov 25, 2005 — 12:54 AM

This is going to be a hard problem to describe so please bear with me as I try to explain all of it.

I've begun work on my own GUI framework for my projects. My framework is called SimGUI and has in it a file SimGUI.h which simply includes all the other files. The one of interest is SimGUIFrame.h which declares the class SimGUIFrame. My framework compiles just fine without even a warning.

Now I go to my test app and include <SimGUI/SimGUI.h> which works just fine, but when I try to declare an instance of SimGUIFrame, I get an error stating that SimGUIFrame is used as a type but not declared as such.

Any idea why my program can't find the class I declared in the framework? Let me know if you need more information to go off of to help because this is quite an elaborate problem that I wasn't sure how to exactly ask the question.

OneSadCookie

Luminary

Posts: 5,125
Joined: 2002.04

Post: #2

Nov 25, 2005 — 02:43 AM

I think you should post SimGUI.h, SimGUIFrame.h and the source file that's using it.

Nick

Sage

Posts: 1,066
Joined: 2004.07

Post: #3

Nov 25, 2005 — 07:02 AM

New code three posts down. Just saving space.

Nick

Sage

Posts: 1,066
Joined: 2004.07

Post: #4

Nov 25, 2005 — 08:57 AM

This also raises another question: can a class have a pointer to an instance of iteself such as:

Code:

class aClass

{

public:

    aClass();

   ~aClass();

private:

   aClass *next;

};

Zekaric

Member

Posts: 131
Joined: 2004.10

Post: #5

Nov 25, 2005 — 10:14 AM

Quote:This also raises another question: can a class have a pointer to an instance of iteself

Yes, but you might consider using a premade container found in STL (or similar) rather than doing the linked list (or dynamic array or whatever you end up choosing to use) coding yourself.

Nick

Sage

Posts: 1,066
Joined: 2004.07

Post: #6

Nov 25, 2005 — 10:19 AM

More updates (because this is all I've been working on):

I've removed the files from the framework and just added them to my project (to see if that helps) and it still won't recognize the class as a type. It will, however, recognize SimGUIEntity. It also won't recognize SimGUITest (another class in that group). I'm wondering what would cause Xcode to not see any class besides SimGUIEntity.h when I include SimGUI.h.

Here's all the relevent code:
SimGUI.h

Code:

#ifndef __SIMGUI_H__

#define __SIMGUI_H__

#include "SimGUIEntity.h"

#include "SimGUIFrame.h"

#include "SimGUITest.h"

#endif

SimGUIEntity.h

Code:

#ifndef __SIMGUIENTITY_H__

#define __SIMGUIENTITY_H__

enum SimGUIType

{

    SimGUIUnknown,

    SimGUIFrame,

    SimGUILabel,

    SimGUIButton,

    SimGUITextField,

    SimGUISlider

};

class SimGUIEntity

{

public:

    SimGUIEntity();

    SimGUIEntity(SimGUIType t);

    virtual ~SimGUIEntity();

    virtual void Draw()    const = 0;

    SimGUIType        type;

    bool            visible;

    SimGUIEntity    *next;

};

#endif

SimGUIFrame.h

Code:

#ifndef __SIMGUIFRAME_H__

#define __SIMGUIFRAME_H__

#include "SimGUIEntity.h"

#include "SimEngineStructs.h"

#include "SimEngineStructFunctions.h"

#include <OpenGL/OpenGL.h>

#include <OpenGL/gl.h>

class SimGUIFrame

{

public:

    SimGUIFrame();

    SimGUIFrame(SimPoint2D pos, SimColor c = SimMakeColor(SimColorBlack,0));

    SimGUIFrame(SimSize2D size, SimColor c = SimMakeColor(SimColorBlack,0));

    SimGUIFrame(SimPoint2D pos, SimSize2D size, SimColor c = SimMakeColor(SimColorBlack,0));

    SimGUIFrame(SimRect2D rect, SimColor c = SimMakeColor(SimColorBlack,0));

    virtual ~SimGUIFrame();

    void AddEntity(SimGUIEntity    *entity);

    void Draw();    

protected:

    bool            visible;

    SimRect2D        frame;

    SimColor        color;

    SimGUIEntity    *firstObject;

};

#endif

main.h

Code:

#ifndef __MAIN_H

#define __MAIN_H

#define FULLSCREEN_ON    0

#define VSYNC_ON        1

//system includes

#include <SDL/SDL.h>

#include <SDL/SDL_opengl.h>

#include <OpenGL/OpenGL.h>

#include <OpenGL/gl.h>

#include <OpenGL/glu.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>

#include <math.h>

#include "SimEngineStructs.h"

#include "SimEngineStructFunctions.h"

#include "SimGUI.h"

...

(function declarations)

main.cpp

Code:

#include "main.h"

//external variables from init.cpp

extern bool done;

extern bool escPressed;

extern bool wPressed,sPressed,aPressed,dPressed,qPressed,ePressed,leftMousePressed,rightMous​ePressed,rightMouseHeld;

extern int screenWidth, screenHeight, lastFramesPerSecond;

extern float frameInterval;

GlyphToolkit *font1 = NULL;

SimGUIFrame    window;

Code:

Errors:

main.cpp:12: error: 'SimGUIFrame' is used as a type, but is not defined as a type.

Nick

Sage

Posts: 1,066
Joined: 2004.07

Post: #7

Nov 25, 2005 — 10:23 AM

Zekaric Wrote:Yes, but you might consider using a premade container found in STL (or similar) rather than doing the linked list (or dynamic array or whatever you end up choosing to use) coding yourself.

I may later but first I must figure out why this darn thing won't recognize my class as a type. Then I'll look into handling the data. I was thinking about using a premade container but I think my design will work fine. There's no way to remove items, but being a GUI I don't really think I need that feature. I do have a boolean value to determine whether or not to draw a certain thing so I can alter the GUI at runtime in that respect. I also don't need sorting or anything.

OneSadCookie

Luminary

Posts: 5,125
Joined: 2002.04

Post: #8

Nov 25, 2005 — 02:03 PM

I can't see what's going on there... You may need to preprocess main.cpp to get a handle on what the compiler's seeing.

Nick

Sage

Posts: 1,066
Joined: 2004.07

Post: #9

Nov 26, 2005 — 01:11 PM

OneSadCookie Wrote:I can't see what's going on there... You may need to preprocess main.cpp to get a handle on what the compiler's seeing.

How do I do that?

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