C / C++ / MFC

9-Jul-06 20:05

Hi,
I'm trying to activate a global function for several times (template function).
The only way I can figure how to do it is through a global variable, e.g.:
int dummy = SomeGlobalFunc();
I've wrapped this global variable definition with a preprocessed macro because I want to call the global function several times and for that I need to define a different global variable each time.
The problem is how to define a global variable with a different name each time (I can't use the predefined __COUNTER__ of VS beacause I need this code to be portable).

thanks,
Alon.

Viorel.9-Jul-06 22:29

Viorel.

9-Jul-06 22:29

Maybe you can define your macro without the unneeded variable:

#define GLOBAL_CALL SomeGlobalFunc();

Even if the return value is not saved, the global function will be called.

You can also try this:

#define GLOBAL_CALL { int dummy = SomeGlobalFunc(); }

I hope this helps.

AlonYair9-Jul-06 23:07

9-Jul-06 23:07

It's not that I need the return value of the global function, but because C++ doesn't support calling global functions I'm doing a little bypass by defining a global variable and initializing it by calling to the required function.
About the second idea, I thought it was a good idea too to define the global variable in a seperated scope and that way to prevent the need of defining different name for each global variable, but... the compiler decieded to yell that it's not possible defining seperated scope under the global scope.

Viorel.9-Jul-06 23:40

Viorel.

9-Jul-06 23:40

In case of file level calling, I think you can try this:

#define MERGE1(a, b)   a##b
#define MERGE(a, b)    MERGE1(a, b)

#define GLOBAL_CALL    static MERGE(dummy, __LINE__) = SomeGlobalFunc();

The __LINE__ macro, in contrast with __COUNTER__, seems to be portable.

I hope it helps.

AlonYair10-Jul-06 3:22

10-Jul-06 3:22

Yep, I've already tried this, but then I've realized that I might have several global variables defined in different files but at the same line.
So my next move was trying to concatenate also the __FILE__ macro in all kinds of ways but it didn't work.
What is the right syntax to concatenate dummy , __FILE__ , __LINE__ all in the same variable name ?

Re: Structure and CPtrList

Viorel.10-Jul-06 3:43

Viorel.

10-Jul-06 3:43

I think the suggested static modifier should prevent name collisions.

Structure and CPtrList

Anu_Bala9-Jul-06 19:58

Anu_Bala

9-Jul-06 19:58

Hi,
I am adding somedetails of a page like page no.page title..etc..
and then im getting value from the same CptrList.
My problem is when adding to list the correct value is entered.But i get the value from list,at that time it shows wrong value.Pls help me..i ll show the code
For adding value to list..
POSITION hPos = GrPageList.GetHeadPosition();
while(hPos)
{
SGraphicsDet *pData = (SGraphicsDet *)GrPageList.GetNext(hPos);
}
pDet->iPageNo = iSelPg;//checked here..its correct
GrPageList.AddTail(pDet);

To get the value:
SGraphicsDet *pGrPgConf;
POSITION pos = GrPageList.GetHeadPosition();
while(pos)
{
pGrPgConf = (SGraphicsDet*)GrPageList.GetNext(pos);
if(pGrPgConf->iPageNo == (giSchPNo + 1))
SetSoftKeys(pGrPgConf,giSchPNo);
}
here pGrPgConf->iPageNo shows the wrong value.
For example in adding the PageNo is 1,but in getting this value it shows 0.

Sarath C9-Jul-06 21:02

Sarath C

9-Jul-06 21:02

Anyway I dint go through the entire code. I suggest you to use CPtrArray instead because it is indexed. But the insertion will be much slower than List.

See the difference between the different template classes.

List
The list class provides an ordered, nonindexed list of elements, implemented as a doubly linked list. A list has a "head" and a "tail," and adding or removing elements from the head or tail, or inserting or deleting elements in the middle, is very fast.

Array
The array class provides a dynamically sized, ordered, and integer-indexed array of objects.

Map (also known as a dictionary)
A map is a collection that associates a key object with a value object.

See MSDN for more information.

SaRath.

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edit box with read only properties and color text

Manjunath S9-Jul-06 19:56

Manjunath S

9-Jul-06 19:56

Hi,
I created a dialog using createdialog() in win32 program .And in that in created a edit box using createwindow.
I have handled WM_CTLCOLOREDIT like this

case WM_CTLCOLOREDIT:

hdc = (HDC)wParam;
SetTextColor(hdc, RGB(0,0,255));

hdc3 = GetDC(c_hwnd);//c_hwnd is handle to button

crBkgnd = GetBkColor(hdc3);
SetBkColor(hdc,crBkgnd);
GetSysColorBrush(COLOR_3DHILIGHT);
break;

here only i can see the change of color in text but background color is not changing to button default color (color is specified in code using crBkgnd)..
whenever text appears background color will be white...

Thanking you

Manjunath S
GESL
Bangalore

Re: edit box with read only properties and color text

Naveen9-Jul-06 20:08

Naveen

9-Jul-06 20:08

u should return abrush by which u want to draw the background...

case WM_CTLCOLOREDIT:<br />
<br />
<br />
hdc = (HDC)wParam;<br />
SetTextColor(hdc, RGB(0,0,255));<br />
<br />
hdc3 = GetDC(c_hwnd);//c_hwnd is handle to button <br />
<br />
crBkgnd = GetBkColor(hdc3);<br />
SetBkColor(hdc,crBkgnd);<br />
return (LRESULT)GetSysColorBrush(COLOR_3DHILIGHT);

nave

Re: edit box with read only properties and color text

Manjunath S9-Jul-06 21:01

Manjunath S

9-Jul-06 21:01

I have created an edit control like the following ,But when i try to changes to readonly by adding ES_READONLY to edit control .but both text color and background color is changing to default(i.e text to black and background in not changing)when i add ES_READONLY.

c_hwnd = CreateWindowEx(0, "Edit", NULL,WS_CHILD,320, 220,318, 238,
d_hnd, NULL, hInst, NULL);

if(c_hwnd == NULL) {
MessageBox(NULL, "could not create window", "Error", MB_ICONERROR);
return 0;
}

Manjunath S
GESL
Bangalore

Re: edit box with read only properties and color text

Naveen9-Jul-06 21:23

Naveen

9-Jul-06 21:23

ok..When u add the ES_READONLY style, instead of WM_CTLCOLOREDIT, handle WM_CTLCOLORSTATIC

nave

Re: edit box with read only properties and color text

Hamid_RT9-Jul-06 21:32

Re: edit box with read only properties and color text

9-Jul-06 21:32

See MSDN,
From the MSDN
Read-only or disabled edit controls do not send the WM_CTLCOLOREDIT message; instead, they send the WM_CTLCOLORSTATIC message.

whitesky

Hamid_RT9-Jul-06 20:23

Creating Win32 DLL in Vs.Net

9-Jul-06 20:23

for this work you need to return brush else system use from defalt brush

whitesky

Abhi Lahare9-Jul-06 19:56

Abhi Lahare

9-Jul-06 19:56

How I can create a win32 DLL Project in Visual Studio 2003?

Regards
Abhi Lahare

Re: Creating Win32 DLL in Vs.Net

AlonYair9-Jul-06 20:13

Re: Creating Win32 DLL in Vs.Net

9-Jul-06 20:13

New Project --> C++ folder --> Win32 Console Application
Then a wizard window will pop up, go to settings and mark the DLL checkbox.

goodluck

Abhi Lahare10-Jul-06 18:51

Abhi Lahare

10-Jul-06 18:51

Thanks Alon

Regards
Abhishake

Re: Creating Win32 DLL in Vs.Net

Hamid_RT9-Jul-06 20:25

9-Jul-06 20:25

See Win32 dll Creation and usage [^]

whitesky

CImageList for CTreeCtrl

anu_889-Jul-06 19:45

anu_88

9-Jul-06 19:45

Hai
How can we set images for items on CtreeCtrl
Thanks in advance. Smile | :)

Abhi Lahare9-Jul-06 19:53

Abhi Lahare

9-Jul-06 19:53

SetItem( TVITEM* pItem )

Regards
Abhi Lahare

FarPointer9-Jul-06 20:19

FarPointer

9-Jul-06 20:19

you need to use
CImageList* SetImageList( CImageList * pImageList, int nImageListType );
before you do insertitem and in that pass the index in the imagelist you need to display .

Regards,
FarPointer
Blog:FARPOINTER

Hamid_RT9-Jul-06 20:26

Re: CImageList for CTreeCtrl [modified]

9-Jul-06 20:26

See SetItem and SetImageList

whitesky

anu_889-Jul-06 20:57

anu_88

9-Jul-06 20:57

Thanks for your reply.I got it.
But when I insert items I am getting all the items as root items.How can I insert child items in to the tree Confused | :confused:

-- modified at 3:02 Monday 10th July, 2006

Hamid_RT9-Jul-06 21:07