C / C++ / MFC

Re: using template functions as part of a class? is it possible?

5-Feb-03 4:44

Sorry, I've corrected the syntax... could you take other look at it?

-=jarl=-5-Feb-03 4:46

-=jarl=-

5-Feb-03 4:46

...right, so reading, my reply again I realise that it might not be entirely clear....;P

What I was trying to say was;
Member function templates are poorly supported by VC 6
Member function templates are supported by VC 7, however...
Member function template specialisation is not, ( not properly, anyways ),

What you are trying to do, ( splitting template declaration and definition into
separate files ), is the subject of the mysterious export keyword, which for
numerous reasons has been deemed a red herring.

Unfortunately (?), the only solution is to keep the declaration and definition in the same header file.

If you want to make sure that the linker has a single instance of a template somewhere, ( and not rely on client code usage patterns ), you can instantiate it using the
template keyword on its own, like so;

in some cpp files somwhere...

<br />
template MyTemplatedClass<SomeType>;<br />

this will generate all the code for MyTemplatedClas<sometype> in the cpp file for the linker to use. HOWEVER....this doesn't work for template member functions, only for the whole class, ( or perhaps for free functions. )

So...'tis a bit messy...

-=jarl=-

Re: using template functions as part of a class? is it possible?

-=jarl=-5-Feb-03 4:48

-=jarl=-

5-Feb-03 4:48

aaaarghhh....i hate this... the < typename T > bit keeps getting lost in the wash....
oh well, we now know what we're both trying to say. Smile | :)

-=jarl=-

Re: using template functions as part of a class? is it possible?

Joaquín M López Muñoz5-Feb-03 8:14

Joaquín M López Muñoz

5-Feb-03 8:14

Try this approach:

// header
 
class CMyClass
{
public:
  template<class T> void MyFunction(T& Parameter)
  {
    // implementation
  }
};

Although you can legally move the definition of MyFunction outside the body of CMyClass declaration, VC++ 6.0 crashes at it, so this is your only option (don't know about VC++ 7.0).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: using template functions as part of a class? is it possible?

Joan M5-Feb-03 4:44

Re: using template functions as part of a class? is it possible?

5-Feb-03 4:44

Sorry, I've corrected the syntax... could you take other look at it?

Joan M5-Feb-03 20:27

Re: using template functions as part of a class? is it possible?

5-Feb-03 20:27

Right,

this has worked well.

Thank you very much.

-=jarl=-5-Feb-03 4:57

-=jarl=-

5-Feb-03 4:57

btw, just a word of warning:

the VC compiler(s), ( even .NET 2003 ), are experts at throwing up red-herring errors when they encounter problems with templates. The errors you get might have little or nothing to do with the real problem... Frown | :(

-=jarl=-

new panel in statusbar is tiny!

ns5-Feb-03 4:03

5-Feb-03 4:03

I did: this is from an example I found. Now in my old project it shows up as a decent sized panewl, but in this one is tiny! I dont recall what I did specially to make the panel wider before....I have the same code in that project but theres got to be something else I did ....but what? Helllpppp!

int CPaletteStatusBar::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CStatusBar::OnCreate(lpCreateStruct) == -1)
		return -1;
	CRect rect(0,0,0,0);

	m_THBImageRainbow.Create("Rainbow", WS_CHILD, rect, this, IDC_THBIMAGERAINBOW);
	return 0;
}

void CPaletteStatusBar::OnSize(UINT nType, int cx, int cy) 
{
	CStatusBar::OnSize(nType, cx, cy);
	
	// TODO: Add your message handler code here

	UINT inx;

	CRect rect;

	inx = CommandToIndex (ID_INDICATOR_RAINBOW);

	GetItemRect(inx, &rect);

	m_THBImageRainbow.MoveWindow(rect);

	m_THBImageRainbow.ShowWindow(SW_SHOW);
}

Appreciate your help,
ns

additional bit of info

ns5-Feb-03 4:11

5-Feb-03 4:11

I stepped in and inx is coming out to be some really large positive integer...

Appreciate your help,
ns

Re: new panel in statusbar is tiny!

Maximilien5-Feb-03 4:19

Maximilien

5-Feb-03 4:19

the panel associated with your ID ID_INDICATOR_RAINBOW need a string in a string table, and the panel will be sized to fit the string that you set in the resources.

at least that's what I did.

Max.

A big thank you!!

ns5-Feb-03 4:23

5-Feb-03 4:23

That was it-----I now recall doing that in my old project!

Appreciate your help,
ns

Problems with Class Wizard?

aslm5-Feb-03 3:53

aslm

5-Feb-03 3:53

Hi trying to use Visual Studio 6.0 (sp5) but there seams to be some problem with my project. I have copied some source files and stuff from other projects in to this new one and now my class wizard don’t work as supposed any more. Frown | :(

Some of my classes do not show up in the class wizard but they are in the project, I can compile and edit the files. This also results (I think) in that the so helpful “inline help” in the code for those classes do not work when I edit them.

Anyone know of how the wizard store its information or if there is anny tool or other way to fix a
corrupt project like this?

regards Me...

Re: Problems with Class Wizard?

Joan M5-Feb-03 4:14

Re: Problems with Class Wizard?

5-Feb-03 4:14

Hello,

I don't know if there are better solutions (I'm novice)

You can try this:

1) Get a copy of your full project directory in a safe place.
2) Delete the *.clw file (where the class information is stored)
3) Try to access the class wizard (Ctrl + W)
4) regenerate class information from your project files (automatic process)
5) reorganize all your classes in the class wizard tree.

hope this helps...

Harold Bamford6-Feb-03 9:39

Harold Bamford

6-Feb-03 9:39

I have found that Class Wizard often gets confused when I am modifying the code. Almost always, the way to fix it is to edit the header file for a class, change a character (any character) and change it back. Save the file and things start working again.

I can only presume that this forces some kind of parsing action on the files involved.

Good luck!

capturing keypressing events when focus is on different window

sulaxan5-Feb-03 3:12

sulaxan

5-Feb-03 3:12

we have one editor(Text) which is executable. we want to write an application which captures the keyboard press events when user is typing into the editor.
we can get the editor window handle by FindWindow() win32 API.
But how to capture the keyboard Events when user is typing something into Editor??.

thanks in advance

adi narayana.

Re: capturing keypressing events when focus is on different window

Jeremy Falcon5-Feb-03 3:39

Jeremy Falcon

5-Feb-03 3:39

You'll either have to install a hook on the external window and intercept its WM_KEYDOWN, etc. messages or use functions like GetKeyState() and GetAsyncKeyState() to retreive the keyboard state (globally) in a loop.

Jeremy Falcon
Imputek

Re: capturing keypressing events when focus is on different window

Jeremy Falcon5-Feb-03 3:41

Jeremy Falcon

5-Feb-03 3:41

BTW, if you are trying to make a password snatcher I'll kill you! Poke tongue | ;-P

Jeremy Falcon
Imputek

Executing Remote Commands on an FTP Server

Alexinuk5-Feb-03 2:05

5-Feb-03 2:05

Hi,

I am trying to find a way of executing remote commands on an FTP server programmatically (i.e. some way of getting the same functionality as the ftp command 'quote'). CFtpConnection and the related classes don't have this functionality, so does anyone have any idea where I should look? are there some SDK commands I can use?

Thanks in advance,

Alex

Use MSDN

AlexO5-Feb-03 2:40

5-Feb-03 2:40

MFC: CFtpConnection::Command
SDK: ::FtpCommand

Alexinuk5-Feb-03 2:49

5-Feb-03 2:49

Which version of MFC is this? I can't find a reference on MSDN either - I'm using VC 6.0...?

AlexO5-Feb-03 2:57

5-Feb-03 2:57

VC7. For VC6 use ::FtpCommand in wininet.dll(.lib)

Alexinuk5-Feb-03 3:02

5-Feb-03 3:02

AlexO wrote:
VC7. For VC6 use ::FtpCommand in wininet.dll(.lib)

Do you mean link with this? could you explain a bit more?

Thanks,

Alex

Use MSDN

AlexO5-Feb-03 3:17

5-Feb-03 3:17

bool MyClass::ExecuteCommand(const CFtpConnection& rMyValidFtpconnection)
{
return TRUE == ::FtpCommand(rMyValidFtpconnection, FALSE, FTP_TRANSFER_TYPE_BINARY, _T("not_supported_by_mfc_ftp_command"), 12345, 0);
}

CInternetFile* MyClass::ExecuteCommandWithReturn(CFtpConnection& rMyValidFtpconnection)
{
HINTERNET hSteram = 0;
if(::FtpCommand(rMyValidFtpconnection, TRUE, FTP_TRANSFER_TYPE_BINARY,_T("not_supported_by_mfc_ftp_command_that_returns data"), 123456, &hSteram))
{
return new CInternetFile(hSteram , T("not_supported_by_mfc_ftp_command_that_returns data"), &rMyValidFtpconnection, TRUE);
}

return 0;
}

Alexinuk5-Feb-03 3:20

5-Feb-03 3:20

Cheers for the reply.

I understand how to use the function, but I simply can't use it. I get the message:

c:\ftpcmd\ftpcmd.cpp(32) : error C2065: 'FtpCommand' : undeclared identifier

or that 'FtpCommand is not a part of Global Namespace'.

I've tried linking with wininet.lib, and i'm on IE6.0.

How can I use this function?

-Alex

AlexO5-Feb-03 3:46