C / C++ / MFC

Re: Find option ia SDI frame

22-Sep-06 22:17

kamalesh82 wrote:
I've to create the "find string option in a particular file" with key board enable "Ctrl+F"

Try using RegisterHotKey. Handle those messages in WM_HOTKEY...
The statement registers CTRL+F1 as the hotkey..
RegisterHotKey(hWnd,1,MOD_CONTROL,VK_F1 );

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

A_Fa23-Sep-06 0:22

A_Fa

23-Sep-06 0:22

Very nice : RegisterHotKey

again very nice --> Somethings seem HARD to do, until we know how to do them.

Spint control

RockyJames22-Sep-06 18:53

22-Sep-06 18:53

hi,
I want write a sample application,having two edit boxes and one spincontrol.The spin control is set as buddy to the first editbox.I want to the setrange as 0 to 200.In the second edit box i want to enter data,the steps of increment tha has to be done in,first edidbox when click in spin control...Pls can any help how to address this..issue..

thanks in before james....

_AnsHUMAN_ 22-Sep-06 19:03

22-Sep-06 19:03

RockyJames wrote:
I want to the setrange as 0 to 200

Use CSpinButtonCtrl::SetRange(short nLower,short nUpper);

RockyJames wrote:
the steps of increment tha has to be done in,first edidbox when click in spin control.

Take the text from the second edit box and convert it to integer value. Now you can use CSpinButtonCtrl::SetPos(int nPos); for Spin control.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

RockyJames22-Sep-06 19:12

Re: Spint control [modified]

22-Sep-06 19:12

yeah i did this...i want to handle..(UDN_DELTAPOS)OnDeltaposSpin...of the spin control..Say for example the initial value in editbox one is 0 and the initial value in editbox two is 10..when the click the spincontrol.the value in first editbox has to updated based on the interval specified in second editbox..here..0 ,10 ,20 ,30 etc..how to do it..?

thanks in before..

_AnsHUMAN_ 22-Sep-06 20:05

22-Sep-06 20:05

RockyJames wrote:
value in first editbox has to updated based on the interval specified in second editbox.

void CYourDlg::OnDeltaposSpin1(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMUPDOWN pNMUpDown = reinterpret_cast<LPNMUPDOWN>(pNMHDR);
        if(m_strEdit2.GetWindowTextLength()>0) //add this if condition
	{
	   CString s;
	   m_strEdit1.GetWindowText (s);
	   int i=atoi(s);
	   CString t;
	   m_strEdit2 .GetWindowText (t);
	   int j=atoi(t);
	   pNMUpDown ->iDelta =j;
	   CString u;u.Format ("%d",i+j);
	   m_st rEdit1.SetWindowText (u);
	}
	else   // Add this block
	{
		CString x;
		x.Format ("%d",pNMUpDown ->iPos );
		m_strEdit1.SetWindowText (x);
	}
	*pResult = 0;
}

In On InitDialog of your dialog you can put:

CWnd *wnd=GetWindow (IDC_EDIT1);
m_Spin.SetBuddy (wnd);
m_Spin.SetRange (0,200);
m_strEdit1.SetWindowText ("0");

Let me know if this suits your needs now or even if there does exist some problem just inform me back...
-- modified at 2:15 Saturday 23rd September, 2006

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

RockyJames22-Sep-06 20:23

22-Sep-06 20:23

When i click..up arrow of the..spincontrol value has tobe increased and when i click down arrown value has to be decreased in first edit box,but there in both cases..value is increased...

_AnsHUMAN_ 22-Sep-06 21:01

22-Sep-06 21:01

Put m_strEdit2.SetWindowText("1"); in On Init dialog.
In OnDeltaPos.... add these lines.

UDACCEL updown;
CString t;
m_strEdit2 .GetWindowText (t);
int j=atoi(t);
updown.nInc =j;
updown.nSec =1;
m_Spin.SetAccel (1,&updown);
CString str;
str.Format ("%d",pNMUpDown ->iPos );
m_strEdit1.SetWindowText (str);

I haven't tested the code...

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

RockyJames22-Sep-06 23:56

22-Sep-06 23:56

still it is not working properly..frined..

[DESPERATED]Linking probs...

Hamid_RT23-Sep-06 8:56

Hamid_RT

23-Sep-06 8:56

What do you want,exactly?
You have two editboxs and a spin control that it sets to 0..200 then?

WhiteSky

Lord Kixdemp22-Sep-06 14:10

22-Sep-06 14:10

Hello everyone!
OK, I have a few files, and there's one that causes problems (MapHandling.h). No matter what I declare in it, it tells me it's already dfined in Game.obj (probably Game.h and Game.cpp)... And sometimes twice, like here:

1>MapHandling.obj : error LNK2005: "void __cdecl Hai2u(void)" (?Hai2u@@YAXXZ) already defined in Game.obj<br />
1>MapHandling.obj : error LNK2005: "struct SDL_Surface pwnz" (?pwnz@@3USDL_Surface@@A) already defined in Game.obj<br />
1>Main.obj : error LNK2005: "void __cdecl Hai2u(void)" (?Hai2u@@YAXXZ) already defined in Game.obj<br />
1>Main.obj : error LNK2005: "struct SDL_Surface pwnz" (?pwnz@@3USDL_Surface@@A) already defined in Game.obj<br />
1>..\Release/War Game.exe : fatal error LNK1169: one or more multiply defined symbols found

Here's the file:

<br />
// MapHandling.xxx: Handles maps.<br />
<br />
#ifndef _MAPHANDLING_H_<br />
#define _MAPHANDLING_H_<br />
<br />
#include "Includes.h"<br />
<br />
void Hai2u();<br />
<br />
SDL_Surface pwnz;<br />
<br />
#endif // _MAPHANDLING_H_<br />

I have include guards on all header files (triple-checked... probably decatriple...). Also note, if I include the file in Main.cpp instead of Game.h, it causes no problems... Anyone know what could possibly be wrong here? Thanks!

Windows Calculator told me I will die at 28. Frown | :(

Jörgen Sigvardsson22-Sep-06 14:28

22-Sep-06 14:28

The pwnz variable will be declared globally in each cpp file you include MapHandling.h. There's 50% of your errors. Why it complains about Hai2u(), I really don't know. Where is the function body located?

--
A Stern Warning of Things to Come

Lord Kixdemp22-Sep-06 14:45

22-Sep-06 14:45

But isn't that what include guards are supposed to avoid? Confused | :confused:

And Hai2u() was another test func... Let's only worry about pwnz now. Thanks! Wink | ;)

Windows Calculator told me I will die at 28. Frown | :(

Jörgen Sigvardsson22-Sep-06 15:18

22-Sep-06 15:18

Include guards will only guard against multiple inclusions of the same header file in a single .cpp-file.

When the compiler runs, it compiles your .cpp-files, one by one. The compilation process is divided into two phases: preprocessing and C++ compilation. The preprocessor expands all preprocessor directives (#include is one such directive) before it passes the preprocessed source code to the compiler, which in turn generates object code.

When all files have been compiled, the linker comes into play. The linker will join all the object code files produced by the compiler, into a single file (.exe, .dll).

Now that you know the basics of the compilation and linking process, it will not be hard to understand why the include guards cannot help you in the case of pwnz. Suppose we have this include file:

// inc.h
#ifndef __INC_H__
#define __INC_H__
int x;
#endif

And a source file:

// src1.cpp
#include "inc.h"

and a second source file:

// src2.cpp
#include "inc.h"

The preprocessor processes the file src1.cpp file. It will replace the #include-line with the contents of inc.h. The net effect of this would be a single line in src1.cpp, declaring an int variable with name x. No problems so far.
The preprocessor sends the processed code to the compiler, which sees the variable declaration. No problems so far. An object code file is produced: src1.obj
The preprocessor processes the file src2.cpp. As with src1.cpp, its contents will be the same (because it includes the same include file). No problems so far.
Same thing here as in 2). The compiler sees the variable declaration. Since src1.cpp and src2.cpp are compiled independently, there is no name collision. The variable declared in src1.cpp is not seen by the compiler in src2.cpp. No problems here either. src2.obj is produced.
All source files have been compiled, so it's time for the linker. The linker examines all object files before it attempts to join them into an .exe-file. What it looks for is to make sure that names are not colliding. In this case, the linker will see that both src1.obj and src2.obj declares a variable with the name x. That is an error, because x is no longer unique - which memory location does x refer to? It can be one of two - and that is something the linker does not like! That is also the error you had in your project.

If you keep in mind that the linker doesn't like ambigous names, and that #include directives are basically "copy'n'paste" operations, you won't run into these problems. If you want to share a variable between two or more source files, you should do something like this:

// inc.h
#ifndef __INC_H__
#define __INC_H__
extern int x; // Notice the extern keyword
#endif // __INC_H__

And:

// src1.cpp
#include "inc.h"
int x; // this is the actual declaration of the variable

and finally

// src2.cpp
#include "inc.h"

The actual declaration is done in only one source file. The "extern" keyword is a heads up for the compiler that the variable name is reserved, and that it is located in some source file. The compiler then puts a filler value in each instance which you use the variable x. The linker will then fill in the filler value in each instance with the real location of x (in this case, the x that is declared in src1.cpp).

A final note about the inclusion guards. Since the compiler and preprocessor process each source file separately, any #define made during the processing of one source file (or any of its included files), are "reset" before the next source file is processed.

I hope I made sense. Good luck with your project! Smile | :)

--
A Stern Warning of Things to Come

Lord Kixdemp22-Sep-06 16:52

22-Sep-06 16:52

FINALLY I'm seeing some light with this! Big Grin | :-D

Yes - you made perfect sense on that... I had it completely different... Blush | :O

pwnz was fixed, but now, what if my "real" variables are on a class or a namespace? I have a namespace called MapHandling that has all the stuff related to maps, so I have a tile structure, an array instance of that, and a function... (This is accessed by the core Game class.) How do I do that? Here's what I did:

MapHandling.h:

#ifndef _MAPHANDLING_H_<br />
#define _MAPHANDLING_H_<br />
<br />
#include "Includes.h" // C++ and SDL headers<br />
<br />
namespace MapHandling<br />
{<br />
    struct TileFile<br />
    { <struct goes here> };<br />
<br />
	extern TileFile Tilesets[1];<br />
	extern void LoadTiles();<br />
};<br />
<br />
#endif // _MAPHANDLING_H_<br />

MapHandling.cpp:

#include "MapHandling.h"<br />
<br />
MapHandling::TileFile MapHandling::Tilesets[1];<br />
<br />
void MapHandling::LoadTiles()<br />
{ <func goes here> }<br />

Anything wrong? Thanks!

Jörgen Sigvardsson wrote:
Good luck with your project!

Thanks!

Windows Calculator told me I will die at 28. Frown | :(

Jörgen Sigvardsson22-Sep-06 22:33

22-Sep-06 22:33

That'll work. You don't need the keyword extern for functions, as function prototypes does the same thing as an extern variable declaration - it tells the compiler to use a filler value until link time. Smile | :)

I'm curious though. Why did you declare an array of only one element?

--
A Stern Warning of Things to Come

Lord Kixdemp23-Sep-06 12:08

23-Sep-06 12:08

Jörgen Sigvardsson wrote:
That'll work.

Nope...

1>MapHandling.obj : error LNK2005: "void __cdecl MapHandling::LoadTiles(void)" (?LoadTiles@MapHandling@@YAXXZ) already defined in Game.obj<br />
1>MapHandling.obj : error LNK2005: "struct MapHandling::TileFile * MapHandling::Tilesets" (?Tilesets@MapHandling@@3PAUTileFile@1@A) already defined in Game.obj<br />
1>Main.obj : error LNK2005: "void __cdecl MapHandling::LoadTiles(void)" (?LoadTiles@MapHandling@@YAXXZ) already defined in Game.obj<br />
1>Main.obj : error LNK2005: "struct MapHandling::TileFile * MapHandling::Tilesets" (?Tilesets@MapHandling@@3PAUTileFile@1@A) already defined in Game.obj<br />
1>..\Release/War Game.exe : fatal error LNK1169: one or more multiply defined symbols found

ThatsAlok wrote:
try rebuild all!

Nope...

Jörgen Sigvardsson wrote:
I'm curious though. Why did you declare an array of only one element?

'Cause there'll be more later... Poke tongue | ;-P

Any more ideas? Thanks! Wink | ;)

Windows Calculator told me I will die at 28. Frown | :(

Jörgen Sigvardsson23-Sep-06 12:11

23-Sep-06 12:11

What's in Includes.h?

--
Fun for the whole family - except grandma and grandpa

Lord Kixdemp23-Sep-06 12:33

23-Sep-06 12:33

Just C++ and SDL stuff:

// Includes.h: C++ and SDL headers.<br />
<br />
// C++<br />
#include <iostream><br />
#include <string><br />
#include <stdlib.h><br />
#include <time.h><br />
#include <vector><br />
using namespace std;<br />
<br />
// SDL<br />
#include "SDL.h"<br />
#include "SDL_image.h"<br />

Thanks!

Windows Calculator told me I will die at 28. Frown | :(