Resources ID based on other resources ID

[pascal_33]

My problem: I need to give to icons resources identifiers values based on other (buttons) identifiers values.
example, if i have a button with CM_TEST identifier, i need to have a corresponding icon with a resource ID = CM_TEST+xxxx

I tried the method explained below without success
Including Shared (Read-Only) or Calculated Symbols
http://msdn.microsoft.com/en-us/library/zakskay9.aspx

So, i follow this method and my rc file contains:

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#include "dialogh2.h"
/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS


my dialogh2.h content some icons identifiers as:
#define IDI_OK (IDOK+20000)
#define IDI_OK_DISABLED (IDOK+30000)
#define IDI_CANCEL (IDCANCEL+20000)
#define IDI_CANCEL_DISABLED (IDCANCEL+30000)

Result: all identifiers are not calculated and seems to get a value of 0.

some observations:

-icon property window show :
ID: "(IDOK+20000)"
(quotes are present)

-when displaying rc resource symbol dialog, my identifiers IDI_OK, IDI_OK_DISABLED ... don't appear (read-only symbols checkbox checked)

-I did some tests as :
#define IDI_OK (1+20000)
same result..
In all cases, identifiers seems to evaluate to 0 (because they become my app icon and i already have an app icon with ID = 1)


How to solve this problem ?
Thank you very much in advance

[John E]

my dialogh2.h content some icons identifiers as:
#define IDI_OK (IDOK+20000)
#define IDI_OK_DISABLED (IDOK+30000)
#define IDI_CANCEL (IDCANCEL+20000)
#define IDI_CANCEL_DISABLED (IDCANCEL+30000)

Are you sure that IDOK and IDCANCEL are already defined, prior to the above #defines? In other words are you certain that windefs.h or winuser.h have already been included somehow? #define is very unintelligent and the compiler probably won't give you a warning if those symbols aren't known yet.

[pascal_33]

yes, they are.

And i also test different things as:
#define IDC_TEST 10
#define IDI_OK (IDC_TEST+100)
same problem !

even
#define IDI_OK (1+100) don't work

[John E]

You're doing something wrong somewhere else. Build and run this small program as a console app:-

#include <stdio.h>
#include <conio.h>

#define IDC_TEST 10
#define IDI_OK (IDC_TEST+100)

int main (int argc, char *argv[])
{
int n = IDI_OK;

        printf ("Value of 'n' = %d", n);
        getch ();

        return 0;
}

[pascal_33]

You're doing something wrong somewhere else. Build and run this small program as a console app:-

#include <stdio.h>
#include <conio.h>

#define IDC_TEST 10
#define IDI_OK (IDC_TEST+100)

int main (int argc, char *argv[])
{
int n = IDI_OK;

        printf ("Value of 'n' = %d", n);
        getch ();

        return 0;
}

You do not understand me. The problem relates to the compilation of rc file.

[D_Drmmr]

#define IDI_OK (1+100) don't work

Doesn't that define a macro which takes one parameter and expands to nothing?
Try if this works:

#define IDI_OK 1+100

If that works, then I'm still not sure if you can replace the 1 with IDOK. That is, I'm not sure the IDOK will get expanded. You may need to do something like

#define ADD(x, y) (x + y)
#define IDI_OK ADD(IDOK, 100)

Also see http://www.boost.org/doc/libs/1_45_0...doc/index.html

[Igor Vartanov]

-when displaying rc resource symbol dialog, my identifiers IDI_OK, IDI_OK_DISABLED ... don't appear (read-only symbols checkbox checked)

Afraid your problem is... using resource editor. As a project coded strictly in plain text editor compiles and works perfectly fine.

[pascal_33]

Afraid your problem is... using resource editor. As a project coded strictly in plain text editor compiles and works perfectly fine.

not only the resource editor, also the resource compiler (see my reply to D_Drmmr)

[pascal_33]

Doesn't that define a macro which takes one parameter and expands to nothing?
Try if this works:

#define IDI_OK 1+100

If that works, then I'm still not sure if you can replace the 1 with IDOK. That is, I'm not sure the IDOK will get expanded. You may need to do something like

#define ADD(x, y) (x + y)
#define IDI_OK ADD(IDOK, 100)

Also see http://www.boost.org/doc/libs/1_45_0...doc/index.html

I have tried a number of different ways and it just does not work. The problem is that in the .rc file the 'calculated' value is replaced by the preprocessor but the rc compiler does not recalculate it but accepts it as a string value.

#define IDI_X 100
#define IDI_Y (ID_X + 100)

...

IDI_X ICON ...
IDI_Y ICON ...

// in rc file gets replaced thus
100 ICON ...
(ID_X + 100) ICON

which is obviously wrong. It seems that rc will not recalculate expressions that are used as labels in resource scripts.

[John E]

The problem is that in the .rc file the 'calculated' value is replaced by the preprocessor but the rc compiler does not recalculate it but accepts it as a string value.

#define IDI_X 100
#define IDI_Y (ID_X + 100)

...

IDI_X ICON ...
IDI_Y ICON ...

// in rc file gets replaced thus
100 ICON ...
(ID_X + 100) ICON

which is obviously wrong. It seems that rc will not recalculate expressions that are used as labels in resource scripts.

As I said earlier, #define is not in any way intelligent. It performs a simple (textual) search and replace, substituting (textually) one expression for another. Whether your compiler subsequently understands the substituted text will vary from one compiler to another. If the resource compiler doesn't understand the end result there's very little you can do (except to keep modifying your #defines until you arrive at something it does understand).

[D_Drmmr]

Shouldn't that be

#define IDI_X 100
#define IDI_Y (IDI_X + 100)

[Marc G]

As already said multiple times, please post a sample project.
It could have several reasons. For example, we don't know how you are using those resource IDs in your code.

[pascal_33]

@ John E and Marc G
I fully understand that you request a full project. But it is very complicated because my app rely on OWLNET libraries (https://sourceforge.net/apps/mediawi...itle=Main_Page)
Nobody want to take hours to install and compile these libraries.

alanjhd08 did a test, and he got same results as me.

My main question is how do you understand this MSDN page ?
http://msdn.microsoft.com/en-us/library/zakskay9.aspx

[VictorN]

@ John E and Marc G
I fully understand that you request a full project.

No, you didn't understand!
No one here needs your "full project"!
We need a very small project that reproduces the same problem you do have now! A very very small! (Or you mean that without linking to "OWLNET libraries" you could not reproduce your problem?

[John E]

pascal_33 - we all understand how frustrating it is to be constantly asked for a small sample project when you think you've already given us all the relevant information but the simple truth is that we've all been down this road, many times before.

Just last week I spent over two days trying to solve a newbie's question - only for him to admit that he'd found the problem in a completely different part of the code that he hadn't told anyone about!