C / C++ / MFC

Re: Visual C++ Solution in GCC

6-Apr-10 9:44

There are many tutorials and 'makefiles how to' on the web, see, for instance [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

David Crow6-Apr-10 10:07

David Crow

6-Apr-10 10:07

See if this helps.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

Vertical/Horizontal scroll bar not coming in CListCtrl

_T("No name")6-Apr-10 3:45

_T("No name")

6-Apr-10 3:45

hi,

i am trying to make a customized Clist control. i have written my Class derived from CListCtrl. The problem is in this Vertical scroll bar are not coming when i dynamically create this list control. if i create it in resource and use DDX_Control and take it as my class variable it works fine(scroll bar comes) but if i create control dynamically scroll bars dont come. This is the creation code

m_pList = new CCustomList(12);


    m_pList-&gt;Create(LVS_REPORT | LVS_SINGLESEL | LVS_EDITLABELS | WS_CHILD | WS_TABSTOP ,
                    CRect(0,0,620,100),this,IDC_LIST3);

    DWORD dwStyle = m_pList->GetExtendedStyle();
    dwStyle |= (LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT);
    m_pList->SetExtendedStyle(dwStyle);

please help if any one has any idea. i searched on net there are many ways to remove them but no solution how to show them.

Thanks

Re: Vertical/Horizontal scroll bar not coming in CListCtrl

_T("No name")6-Apr-10 3:50

_T("No name")

6-Apr-10 3:50

hey guys

i got it.. i dint insert enough items thats why it was not coming...

Thanks

bm_setstate redraw not working

Jach Mullan5-Apr-10 23:57

Jach Mullan

5-Apr-10 23:57

I want to emulate pressing a pushbutton.
I call SendDlgItemMessage(hDlg,IDBUTTON,BM_SETSTATE,TRUE,0L);
and then I have tried calling RedrawWindow(GetDlgItem(hDlg,IDBUTTON),NULL,NULL,RDW_INVALIDATE|RDW_ERASE|RDW_FRAME|RDW_UPDATENOW|RDW_INTERNALPAINT);
with various flag combinations, but the button will not redraw.
If I call MessageBox after the RedrawWindow, the button redraws, but I don't want to do that!
What am I missing?

Re: bm_setstate redraw not working

Eugen Podsypalnikov6-Apr-10 1:58

Eugen Podsypalnikov

6-Apr-10 1:58

Try the following scenario Smile | :)

...
{
...
  SendMessage(hBtn, WM_LBUTTONDOWN, MK_LBUTTON, MAKELONG(10, 10));
  RedrawWindow(hBtn,...);
  Sleep(100);
  SendMessage(hBtn, WM_LBUTTONUP, MK_LBUTTON, MAKELONG(10, 10));
...
}

virtual void BeHappy() = 0;

syntax error [modified]

rupeshkp7285-Apr-10 22:30

5-Apr-10 22:30

I am getting the following error:
error C2143: syntax error : missing ')' before '&'

on building the below code:

typedef unsigned int uint4;
void	Find(uint4& a, uint4 b, uint4 c);
void    Find(uint4& a, uint4 b, uint4 c)
{
	. . . .
}

I do not see any error in code.
Any idea as to why this error is coming up?

modified on Tuesday, April 6, 2010 4:40 AM

CPallini5-Apr-10 22:33

5-Apr-10 22:33

void	Find(uint4& a, uint4 b, uint4 c,);
                                       ^

What's the purpose of that comma?
Smile | :)

rupeshkp7285-Apr-10 22:40

5-Apr-10 22:40

sorry thats a typing mistake here

CPallini5-Apr-10 22:47

5-Apr-10 22:47

Your code compiles fine with my C++ compiler (are you using a C compiler?).
Smile | :)

rupeshkp7285-Apr-10 23:07

5-Apr-10 23:07

yes I guess
how to find that in visual studio
I have written the code in a .cpp file

CPallini5-Apr-10 23:20

5-Apr-10 23:20

.cpp source files are compiled (by default) with the C++ compiler.

However, the default behaviour may be overriden by the /TC compiler option, see [^].
Smile | :)

rupeshkp7286-Apr-10 0:42

6-Apr-10 0:42

Thanks Pallini for the inputs.
I think I have got the bug.
Actually in the VC project the file where I had been calling the fn. is .cpp while I have define it in a .c file.
I guess this may be the problem.

CPallini6-Apr-10 0:50

6-Apr-10 0:50

rupeshkp728 wrote:
Actually in the VC project the file where I had been calling the fn. is .cpp while I have define it in a .c file.
I guess this may be the problem.

Please note you cannot use references (e.g. 'uint4 &' as your function's parameter) in C language.
Smile | :)

rupeshkp7286-Apr-10 0:52

6-Apr-10 0:52

yes I have changed the file name to .cpp

Multiple .cpp files

gamefreak22915-Apr-10 21:45

5-Apr-10 21:45

I'm not sure how using multiple .cpp files to create one .exe works but I'm attempted to using multiples to create just one .exe file. I'm currently using Microsoft Visual Studio 2008 and I've created a project built the project, and ran the file. I've either done something incorrect, or my idea of how this would work is wrong, in which case, my bad.

#include "DarkGDK.h"

void drawBlueBox();
void drawRedBox();
int x=319;

void DarkGDK()
{
	dbSetWindowOff();     // window mode off
	dbMaximiseWindow();     // maximise
	dbSetDisplayMode(1280, 1024, 32);

	while(x=319){
	dbCLS();
	drawBlueBox();
	drawRedBox();
	}
	dbWaitKey();
}

void drawBlueBox()
{
	int red = dbRND(255);
	int green = dbRND(225);
	int blue = dbRND(225);

	DWORD blue1 = dbRGB(red, green, blue);
	DWORD black = dbRGB(0, 255, 0);

	dbInk(blue1, black);
	dbBox(0, 0, 639, 511);
}

void drawRedBox()
{
	int red = dbRND(255);
	int green = dbRND(225);
	int blue = dbRND(225);

	DWORD red1 = dbRGB(red, green, blue);
	DWORD black = dbRGB(0, 255, 0);

	dbInk(red1, black);
	dbBox(640, 512, 1280, 1024);
}

#include "DarkGDK.h"

int y=0;

void main()
{
	int width = dbScreenWidth();
	int height = dbScreenHeight();
	int mouseX = dbMouseX();
	int mouseY = dbMouseY();
	dbPositionMouse(dbScreenWidth()/2, dbScreenHeight()/2);
	DWORD white = dbRGB(255, 255, 255);
	DWORD black = dbRGB(0, 255, 0);

	while(y=0){
	dbInk(white, black);
	dbText(350, 150, "Screen Width: ");
	dbText(460, 150, dbStr(width));
	dbText(120, 350, "Screen Height: ");
	dbText(240, 350, dbStr(height));
	dbText(120, 363, "Mouse Position: (    ,    )");
	dbText(255, 363, dbStr(mouseX));
	dbText(297, 363, dbStr(mouseY));
	dbWait(50);
	}
	
}

The first .cpp file makes a full screen window that makes two randomly color changing boxes, while the second .cpp files tracks your mouses movement as you move it across the screen and displays it. The code on either .cpp files is running properly when compiled alone and into two separate .exe files. If someone could explain exactly how one .exe file made with multiple .cpp files would run I think that would also be helpful.

Cedric Moonen5-Apr-10 22:01

Cedric Moonen

5-Apr-10 22:01

I think you don't really understand how to work with multiple cpp files. In fact, the two files are not "executed at the same time". You still have only one main function which will get called when your program start. If you want to call some functions defined in your second cpp file, you have to call them in your main function.

In fact, having multiple cpp files very similar (in the way of calling the functions I mean) as having only one cpp file. It is used to structure your program a bit more nicely (you don't have one huge file with everything in it).

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

gamefreak22915-Apr-10 22:14

5-Apr-10 22:14

That is what I was coming to think after I actually got the entire project to build and run and it still wasn't working the way I had been expecting. So to get the "main" function of the second .cpp file to run i have to call it within the other one using the same method used for calling the two functions that made the two different colored boxes correct?

Cedric Moonen5-Apr-10 22:29

Cedric Moonen

5-Apr-10 22:29

gamefreak2291 wrote:
So to get the "main" function of the second .cpp file to run i have to call it within the other one using the same method used for calling the two functions that made the two different colored boxes correct?

Yes, but the problem is that you have a while loop in both of your functions, which means that you still won't achieve what you want. You need to have only one loop in which you execute your code.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

gamefreak22915-Apr-10 22:31

5-Apr-10 22:31

Yeah, that how the issue began, I want to have two continuous loops running. One looping at every possible interval(mouse position), the other looping every second or so(changing the colors of the squares). I was wanting to do this without having to create two separate executable files and running then side by side.

Cedric Moonen5-Apr-10 22:41

Cedric Moonen

5-Apr-10 22:41

I suggest you take a look at some tutorials about game programming. What you need to do is only have one loop to handle the messages (e.g. mouse events) and you will need to keep track some information for each object that is drawn (its state). If you want to change the color of the object every second, then you need to remember also the time at which the color changed previously, and before you draw your object, you check if you have to change the color or not.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

gamefreak22915-Apr-10 22:49

5-Apr-10 22:49

I was recently given a brand new copy of a Game and Graphics textbook for C++ and I've been putting it to use. But I like to veer off and try things as I go that aren't explained in my reading materials. The book explained how to color sections of the screen, and from there I used the index to find out the other parts and attempted to combine a few functions I had been wanting to do before starting Visual programming. Nevertheless I plan on finishing the book and maybe it'll continue to help out.

KarstenK5-Apr-10 22:38

KarstenK

5-Apr-10 22:38

You got to understand how an exe is build. There some steps. One is that the compiler translatet the h/cpp files into obj-files and than the linker grab the obj files and creates the exe.

Please refer for further details: http://msdn.microsoft.com/en-us/library/0k6kkbsd.aspx[^]

Press F1 for help or google it.
Greetings from Germany

gamefreak22915-Apr-10 22:45

5-Apr-10 22:45

I do understand how the executable file is compiled, what I was not understanding is how the file is than actually executed.