Re: UNICODE Problem! - C / C++ / MFC Discussion Boards

Thank you all!

ns15-Oct-02 10:20

15-Oct-02 10:20

many thanks for the suggestions - I now have so many options!

Appreciate your help,
ns

Re: which STL container can do this?

Michael Dunn15-Oct-02 10:32

Michael Dunn

15-Oct-02 10:32

ns wrote:
Is there a container that will neither allow duplicates, nor sort?

Isn't that map?

--Mike--
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Re: which STL container can do this?

ns15-Oct-02 10:37

15-Oct-02 10:37

I've used map just for sorting, so not map.

Appreciate your help,
ns

Re: which STL container can do this?

Joaquín M López Muñoz15-Oct-02 11:00

Joaquín M López Muñoz

15-Oct-02 11:00

hash_set is what you want. Unfortunately, this container is not standard. I think STLPort has it, though.
Check here[^] for info about hash_sets.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: which STL container can do this?

Christian Graus15-Oct-02 11:34

Christian Graus

15-Oct-02 11:34

VC7 has it though.

Christian

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002

Re: which STL container can do this?

Joaquín M López Muñoz15-Oct-02 11:53

Joaquín M López Muñoz

15-Oct-02 11:53

Oh, didn't know about it... After having a look at the docs, seems like this hash_set does not serve the needs of ns, since it requires that the elements be ordered --SGI's hash_set, on the other hand, only demands an equality predicate (with the disadvantage or poorer performance, I guess).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

UNICODE Problem!

Daniel Strigl15-Oct-02 9:37

Daniel Strigl

15-Oct-02 9:37

Hi!

I want to change the caption of my property page (CPropertyPage) with setting the pszTitle member of the PROPSHEETPAGE struct.

It works fine when I am init the pszTitle member with something like _T("Hi!"), but when I am init the member with a CString object, in the tab control of my property sheet (CPropertySheet) some stupid characters are displayed.

This code works fine:

m_psp.dwFlags |= PSP_USETITLE;
m_psp.pszTitle = _T("Hi!");

But this code will display some stupid characters:

CString strTitle(_T("Hi!"));

m_psp.dwFlags |= PSP_USETITLE;
m_psp.pszTitle = strTitle;

I think the problem is that the system is working with UNICODE and this member (pszTitle) exspects a LPCSTR and no LPCTSTR.

But why does the first code sequenz woking and the second not?

And how can I fix that?

(Working with embedded Visual C++ 3.0 + MFC)

Daniel Wink | ;)

---------------------------
Never change a running system!

Re: UNICODE Problem!

Dave Bryant15-Oct-02 10:47

Dave Bryant

15-Oct-02 10:47

It's nothing to do with Unicode. Your CString object will get deleted at the end of the current method, but the title is not displayed until later on, at which point it has a bad pointer. If you want to use a CString, make it a member variable of the property page.

Dave

Re: UNICODE Problem!

Abin15-Oct-02 11:13

Abin

15-Oct-02 11:13

It's not the problem of UNICODE, but your confusion on character string and character pointer. Look at your code:

CString strTitle(_T("Hi!"));<br />
m_psp.pszTitle = strTitle;

Above code is wrong, wrong and, WRONG!

I cannot remember how many times it's been emphasized that you do NOT copy string like that, instead, you should do it the correct way:

free((void*)m_psp.pszTitle);<br />
m_psp.pszTitle = _tcsdup(_T("Hi!"));

Then your problem should be gone.

Re: UNICODE Problem!

Daniel Strigl15-Oct-02 20:15

Daniel Strigl

15-Oct-02 20:15

Hi Bin! Thanks for your answer!
But I have a second question.
When I do it you told me, I have to free the pszTitle at the end, or???

...
free((void*)m_psp.pszTitle);
m_psp.pszTitle = _tcsdup(_T("Hi!"));
...
...
...
free((void*)m_psp.pszTitle);

Or does the CPropertyPage class that automatic in the destructor???

Thanks!

Daniel Wink | ;)

Re: UNICODE Problem!

Abin16-Oct-02 5:50

Abin

16-Oct-02 5:50

CPropertyPage will handle that in its destructor.

Q: CreateDIBitmap + GetDeviceCaps

C^hris L^osinger15-Oct-02 9:10

C^hris L^osinger

15-Oct-02 9:10

The MSDN says:

"Calling CreateDIBitmap with fdwInit as CBM_INIT is equivalent to calling the CreateCompatibleBitmap function to create a DDB in the format of the device and then calling the SetDIBits function to translate the DIB bits to the DDB."

So, should I interpret this to mean that CreateDIBitmap actually calls SetDIBits, or just that the results are the same? I ask, because I'm trying to find out if a DC can support CreateDIBitmap or not. Because of the quoted sentence, I assumed that I should check GetDeviceCaps for RC_DI_BITMAP. But, there's a situation where GetDevCaps says RC_DI_BITMAP isn't supported, but CreateDIBitmap still works.

Anyone know anything about this? I hate programming.

-c

Green's Law of Debate:
Anything is possible if you don't know what you're talking about.

Smaller Animals Software

DDBToDIB() problem

Mike Savoie15-Oct-02 9:01

Mike Savoie

15-Oct-02 9:01

Hi all, it's me again. After some searching I found a function that does what I need, converts a ddb to a dib. Problem is it doesn't work and I don't know why. I'll post my trouble code and hopefully someone can send me in the right direction. Thanks in advance.

Mike.

<br />
<br />
HPALETTE		hPal;<br />
	CDC*            pDC;<br />
<br />
	ASSERT( bitmap.GetSafeHandle() );<br />
<br />
	// The function has no arg for bitfields<br />
	if( dwCompression == BI_BITFIELDS )<br />
		return NULL;<br />
<br />
	// If a palette has not been supplied use defaul palette<br />
	hPal = (HPALETTE) pPal->GetSafeHandle();<br />
	if (hPal==NULL)<br />
		hPal = (HPALETTE) GetStockObject(DEFAULT_PALETTE);<br />
<br />
//***********************<br />
//At this point hPal is not NULL, is a valid handle to a palette<br />
//***********************<br />
<br />
	int f = ::GetLastError();<br />
<br />
//***********************<br />
// f == 0.  No error,  that's good!<br />
//***********************<br />
<br />
	// Get bitmap information<br />
	bitmap.GetObject(sizeof(bm),(LPSTR)&bm);<br />
<br />
	// Initialize the bitmapinfoheader<br />
	bi.biSize		= sizeof(BITMAPINFOHEADER);<br />
	bi.biWidth		= bm.bmWidth;<br />
	bi.biHeight 		= bm.bmHeight;<br />
	bi.biPlanes 		= 1;<br />
	bi.biBitCount		= bm.bmPlanes * bm.bmBitsPixel;<br />
	bi.biCompression	= dwCompression;<br />
	bi.biSizeImage		= 0;<br />
	bi.biXPelsPerMeter	= 0;<br />
	bi.biYPelsPerMeter	= 0;<br />
	bi.biClrUsed		= 0;<br />
	bi.biClrImportant	= 0;<br />
<br />
	// Compute the size of the  infoheader and the color table<br />
	int nColors = (1 << bi.biBitCount);<br />
	if( nColors > 256 ) <br />
		nColors = 0;<br />
	dwLen  = bi.biSize + nColors * sizeof(RGBQUAD);<br />
	<br />
	<br />
	// We need a device context to get the DIB from<br />
	hDC = (HDC)GetDC();<br />
<br />
//*********************<br />
//hDC is valid here<br />
//*********************<br />
<br />
	DWORD wx = ::GetDeviceCaps(hDC, RASTERCAPS);<br />
<br />
//*********************<br />
//  wx == 0,  no capabilities??  I'm reading about this function. still don't<br />
//  fully understand capabilities but am assuming not having any is not good<br />
//*********************<br />
<br />
	TRACE("Raster capabilities : %08X\n",wx);<br />
<br />
//*********************<br />
// hPal is still valid coming in here<br />
//*********************<br />
<br />
	hPal = SelectPalette(hDC,hPal,FALSE);<br />
<br />
//*********************<br />
// now all is lost, hPal is now NULL(0x00000000)<br />
// SelectPalette has failed.  because hDC has no capabilities?? <br />
//*********************<br />
<br />
	f = ::GetLastError();<br />
<br />
//*********************<br />
//  f == 6, 'The handle is invalid.'  Ok so my NULL handle is bad.  but why??<br />
//*********************<br />
<br />
	RealizePalette(hDC);<br />

Re: DDBToDIB() problem

C^hris L^osinger15-Oct-02 9:13

C^hris L^osinger

15-Oct-02 9:13

Mike Savoie wrote:
// We need a device context to get the DIB from
hDC = (HDC)GetDC();

so, you're calling this from a window of some kind?

have you tried ::GetDC(NULL) instead?

-c

Green's Law of Debate:
Anything is possible if you don't know what you're talking about.

Smaller Animals Software

Re: DDBToDIB() problem

Mike Savoie15-Oct-02 9:22

Mike Savoie

15-Oct-02 9:22

Hi, thanks for the quick response. No, it's not called from a window. That's why I'm having such a hard time. All the examples I've found display to windows. The way this program works is that once you click the OK button. A pre-generated Large bmp file is created. Then this app is called to crop part of the original file, and save to a new file. All the bitmap manipulation happens unseen in the background, and the file is then passed to a different function for printing. That's why I'm so confused. Like I said every example uses windows, or resource files. Neither of which I have. I hope this makes sense, hehe I've been hacking at this for a couple weeks now and it's turning me into a babbling buffoon! Again thanks for the quick help.

PS- CWnd::GetDC(); //error C2660: 'GetDC' : function does not take 1 parameters

Re: DDBToDIB() problem

C^hris L^osinger15-Oct-02 9:26

C^hris L^osinger

15-Oct-02 9:26

Mike Savoie wrote:
PS- CWnd::GetDC(); //error C2660: 'GetDC' : function does not take 1 parameters

are you trying ::GetDC(NULL) ? (ie. don't try CWnd::GetDC(NULL) )

-c

Alcohol is the anesthesia by which we endure the operation of life.
-- George Bernard Shaw

Smaller Animals Software

Re: thank you

Mike Savoie15-Oct-02 9:30

Mike Savoie

15-Oct-02 9:30

Dude, if I knew where you were I'd kiss ya!! (umm, well maybe buy ya a beer) haha yeah ::GetDC(NULL); worked. A few more bugs and it'll be finished. Thanks again.

howto get fileinformation

mkrelli15-Oct-02 7:22

mkrelli

15-Oct-02 7:22

Hi!

I want to read some information stored in a file.
I mean such as Comment, Title, Author or Keywords.

Are there some APIs that do that ... or must I access the file directly?

Maybe somebody have some code example for me?

Furthermore I want to write (change) this information...

Thanks
Martin

Re: howto get fileinformation

Tomasz Sowinski15-Oct-02 7:43

Tomasz Sowinski

15-Oct-02 7:43

Assuming that you're after properties displayed at 'Summary' page for files located on NTFS volumes, this article may be interesting:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/ntfs5.asp[^]

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

*** Si fractum non sit, noli id reficere. ***

CComboBox acts like CEdit

john john mackey15-Oct-02 7:14

john john mackey

15-Oct-02 7:14

Hi all.

I want to have a CComboBox control that accepts a user's new entry (like a CEdit control) and then adds this entry to the CComboBox.

Here is an example:

Current entries: Cat, Dog, Canary

User types: d-o-l-p-h-i-n (the word dolphin)

Since not in the list, I want my code to add it.

I saw the examples for the IAutoComplete, but I'm not really concerned with that - I just want something simple and that/those examples seem too complex (maybe not? Confused | :confused:

)

Can anyone help me with adding entries to a CComboBox WHILE IN THE CComboBox control?

Thanks so much.
Johnny

Re: CComboBox acts like CEdit

Tomasz Sowinski15-Oct-02 7:23

Tomasz Sowinski

15-Oct-02 7:23

No big magic here - just use CComboBox::FindStringExact to check if user has typed new or existing string, and CComboBox::AddString or CComboBox::InsertString to actually add new entry to dropdown part of the combo.

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

*** Si fractum non sit, noli id reficere. ***

handlin WM_KILLFOCUS in CWnd-derived

mishgun15-Oct-02 6:23

mishgun

15-Oct-02 6:23

hi!

i've encountered serious problem, which couldnt solve for hours.

i've got a couple of views splitted by CSplitterWnd
in one of this views (ParentView) i dynamically create CWnd-derived object (SpinEdit) that holds CEdit and CSpinButtonCtrl (analogously to CInPlaceEdit by Chris Maunder).

the problem is:
i cant handle WM_KILLFOCUS message in SpinEdit window. Spy++ shows that this message isnt sent to SpinEdit window than user clicks mouse button on ParentView.

maybe problem is in ParentView? it is completely owner drawn and has no more child-controls except this dynamically created SpinEdit.

any help will be greatly appreciated

nobody is perfect

Re: handlin WM_KILLFOCUS in CWnd-derived

Roger Allen16-Oct-02 2:07

Roger Allen

16-Oct-02 2:07

This may be of help http://www.codeproject.com/dialog/killfocus.asp[^]

Roger Allen
Sonork 100.10016

I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.

Last Thread post for me...

15-Oct-02 6:14

Hello,
I have learned a ton in the past few days.. Having never programmed UI Threads (with the help of articles on Code Project and all of you) I have implemented a UI thread that contains a CSocket for file transfer.. The server works perfect except when I close the server I have a memory leak.. This is how I start the UI Thread and how I close the UI thread.. what am I doing wrong??

Here is the creation inside CMainFrame

////////////////////////////////////////////////////////////////////////
// Create the UI Thread for file transfer
CFtThread* pThread = (CFtThread*)AfxBeginThread(RUNTIME_CLASS(CFtThread),
THREAD_PRIORITY_NORMAL,0,CREATE_SUSPENDED);
					
	pThread->m_nPort = 21;
	pThread->ResumeThread();
	pThread->OnStartListening();
// End of Thread
////////////////////////////////////////////////////////////////////////

Here is how I am trying to close the thread.. it's in CMainFrame::OnClose()

void CMainFrame::OnClose() 
{
..... code
CFtThread* pThread = (CFtThread*)AfxGetThread();
pThread->ExitInstance();
..... code

CFrameWnd::OnClose();
}

In my int CFtThread::ExitInstance() I try to close the socket and remove any connected sockets...

int CFtThread::ExitInstance()
{
	m_sSocket.ShutDown(2);
	m_sSocket.Close();
	
	POSITION pos, temp;
	pos = m_pEpList.GetHeadPosition(); // m_pEpList is a CPtrList

	while(!m_pEpList.IsEmpty())
	{
		temp = pos;
		CFtSocket* pSocket = (CFtSocket*)m_pEpList.GetNext(pos);
		pSocket->Close();	
		m_pEpList.RemoveAt(temp);
	}

	return CWinThread::ExitInstance();
}

Any ideas on why I still have a memory leak?

Thanks,
Rob Jones

Re: Last Thread post for me...

jmkhael15-Oct-02 6:32

jmkhael

15-Oct-02 6:32

u are emtying the list, but are u deleting the pointers if any??

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.