C / C++ / MFC

Tomasz Sowinski13-Mar-02 4:20

13-Mar-02 4:20

CTreeCtrl::SetBkColor works perfectly for me. The method is implemented with TVM_SETBKCOLOR, which is available on Win98, Win2000 or on systems with IE4 or later installed. Maybe you're using some ancient Windows version?

Tomasz Sowinski -- http://www.shooltz.com

andysolman13-Mar-02 5:06

andysolman

13-Mar-02 5:06

Yep it appears you are right.
What i was trying to do was get the colour of the dialog that the tree control was on, and set the background of the tree control to that colour. It appears that the setting of the tree control background was working fine, but getting the colour from the dialog was not working, it was always returning white, when I want the dodgy windows grey colour!

any ideas how to get the real background colour of the dialog.

cheers

Andy

Shog⁹13-Mar-02 6:04

Shog⁹

13-Mar-02 6:04

::GetSysColor(COLOR_3DFACE);

_{And if words were wisdom, I'd be talking even more.}

The Offspring, I Choose

andysolman13-Mar-02 6:24

andysolman

13-Mar-02 6:24

Magic

cheers!

Andy

Mazdak13-Mar-02 3:11

Mazdak

13-Mar-02 3:11

You want this:?

const int d = 100;
int var[d];
for (int i = 0; i < d; ++i)
var[i] = 0;   //declare 100 of these

cout << var[5];   //prints 0

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

RalfPeter13-Mar-02 3:30

RalfPeter

13-Mar-02 3:30

Not really, even though that is the most logical way to do it. I am curious to know whether in C it is possible to substitute a piece of a variable name with something like a string. e.g:

int variable = 7;
char c[] = "able";

cout << vari%c;//no problem here b/c I'm using a placeholder or such.

ralf.riedel@usm.edu

Tomasz Sowinski13-Mar-02 3:30

13-Mar-02 3:30

RalfPeter wrote:
I am curious to know whether in C it is possible to substitute a piece of a variable name with something like a string.

No, compiled languages like C and C++ do not retain 'variable names' in generated code. Constructs like yours are generally used in scripts.

Tomasz Sowinski -- http://www.shooltz.com

Jon Hulatt13-Mar-02 6:54

Free space available in a drive .

13-Mar-02 6:54

Your looking for enum() kind of functionality, as found in high level languages such as Perl and SQL. Obviously this isn't possible with a compiled language, because you'd have to ship the compiler with the application!!!

Sorry (again) thomas, but you did say you liked mail. Smile | :)

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Neha13-Mar-02 2:39

Neha

13-Mar-02 2:39

Hi,
How can get the free space available in a drive?
Thanks
Neha

Re: Free space available in a drive .

Jon Hulatt13-Mar-02 2:48

Re: Free space available in a drive .

13-Mar-02 2:48

GetDiskFreeSpace() ought to do the trick.

Sorry to dissapoint you all with my lack of a witty or poignant signature.

RalfPeter13-Mar-02 3:19

RalfPeter

13-Mar-02 3:19

BOOL GetDiskFreeSpaceEx(a,b,c,d);

a = "c:\directory" or NULL. If NULL, function returns space in drive where function resides.

b = pointer to variable to receive free bytes available to user of the calling thread.

c = ditto for available (free+used) bytes.

d = pointer to variable to receive total bytes on disk.

ralf.riedel@usm.edu

Re: Free space available in a drive .

lucy13-Mar-02 8:49

lucy

13-Mar-02 8:49

I found a smaple code from MS. And here is the link:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q231497

I can't change the font color by CDC

Feng Qin13-Mar-02 2:31

Feng Qin

13-Mar-02 2:31

I do some works on WM_PAINT:

//////////////////////////////////////////////////////////////////////////
CDC* pDC = GetDC();
CDC cacheDC;
cacheDC.CreateCompatibleDC( pDC );
if( m_pBitmap == NULL )
{
m_pBitmap = new CBitmap;
m_pBitmap->CreateCompatibleBitmap( &cacheDC, m_ClientRect.Width(), m_ClientRect.Height() );
}
CBitmap* pOldBmp = cacheDC.SelectObject( m_pBitmap );

cacheDC->SetTextColor( RGB(0, 0, 255 ) ); //color blue
cacheDC->TextOut( "hello world" );

pDC->BitBlt( m_ClientRect.left,
m_ClientRect.top,
m_ClientRect.Width(),
m_ClientRect.Height(),
&cacheDC, 0, 0, SRCCOPY );

cacheDC.SelectObject(pOldFont);
cacheDC.SelectObject( pOldBmp );
cacheDC.DeleteDC();
//////////////////////////////////////////////////////////////////////////

But the text out is still black, what's the matter? May be I forget some steps?

I'm amumu, and you?

Re: I can't change the font color by CDC

Tomasz Sowinski13-Mar-02 2:32

Re: I can't change the font color by CDC

13-Mar-02 2:32

Your bitmap is monochrome. Change the 1st parameter in CreateCompatibleBitmap to pDC.

Tomasz Sowinski -- http://www.shooltz.com

Roger Allen13-Mar-02 5:42

Roger Allen

13-Mar-02 5:42

Aprt from what Tomas said, you should also be calling SaveDC() and RestoreDC(-1) on your cacheDC object. Although you select back in the original font/bitmap, you shold also restore the original text colour.

DC's should always be returned to the system in the exact state you got them. Thats why SaveDC() / RestoreDC() is so good for you in this situation.

CDC* pDC = GetDC();
CDC cacheDC;
cacheDC.CreateCompatibleDC( pDC );
if( m_pBitmap == NULL )
{
m_pBitmap = new CBitmap;
m_pBitmap->CreateCompatibleBitmap( &cacheDC, m_ClientRect.Width(), m_ClientRect.Height() );
}
caccheDC.SaveDC() ;
cacheDC.SelectObject( m_pBitmap );

cacheDC->SetTextColor( RGB(0, 0, 255 ) ); //color blue
cacheDC->TextOut( "hello world" );

pDC->BitBlt( m_ClientRect.left, 
m_ClientRect.top,
m_ClientRect.Width(),
m_ClientRect.Height(),
&cacheDC, 0, 0, SRCCOPY );

cacheDC.RestoreDC(-1) ;
cacheDC.DeleteDC();

Roger Allen
Sonork 100.10016

If I'm not breathing, I'm either dead or holding my breath.
A fool jabbers, while a wise man listens. But is he so wise to listen to the fool?

Programming on multiprocessor computer

Dang Xuan Ky13-Mar-02 0:45

Dang Xuan Ky

13-Mar-02 0:45

I'm working on a project that uses multiprocessor computer. I want to use multithread teachnique for this and assign a specific thread to a specific CPU. I'm searching materials for my project. Please show me some if you know about this field.
Thanks a lot.
dxKy

Tomasz Sowinski13-Mar-02 1:03

13-Mar-02 1:03

Dang Xuan Ky wrote:
I want to use multithread teachnique for this and assign a specific thread to a specific CPU.

SetThreadAffinityMask does that.

Tomasz Sowinski -- http://www.shooltz.com

Jon Hulatt13-Mar-02 1:41

13-Mar-02 1:41

Be careful though, the OS is pretty good at dividing your threads up between CPU's, and if you start trying to force a thread to a cpu, you may well in fact decrease your application's performance.

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Tim Smith13-Mar-02 2:01

Tim Smith

13-Mar-02 2:01

Jon is correct. You really shouldn't be assigning threads to a CPU. Unless you really have a very strong grasp of the ramifications, you are likely to degrade performance.

Tim Smith

I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?

Tomasz Sowinski13-Mar-02 2:21

13-Mar-02 2:21

Maybe you guys should answer to the original poster? He'll get email notification, etc. Big Grin | :-D

Tomasz Sowinski -- http://www.shooltz.com

Jon Hulatt13-Mar-02 2:45

13-Mar-02 2:45

We thought you'd like the email!!! personally, i *love* getting mail that i don't care about Smile | :)

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Tomasz Sowinski13-Mar-02 2:42

13-Mar-02 2:42

Jon Hulatt wrote:
We thought you'd like the email!!!

I do Smile | :)

I'm just worried about our multi-threaded programmer who can be totally unaware about this discussion Smile | :)

Tomasz Sowinski -- http://www.shooltz.com

Dang Xuan Ky14-Mar-02 5:35

Dang Xuan Ky

14-Mar-02 5:35

I think that I can use SetProcessAffinityMask. For a process I assign it to one CPU and the other to another CPU. The two process can communicate through share memory. That's all what I think but now I try to find a sample to demonstrate the using of SetProcessAffinityMask. I read it a lot in MSDN but nothing is found. If you have the code, please show me. Thanks everybody.

Tomasz Sowinski14-Mar-02 5:50