Re: Can you have ranges in a switch statement? - C / C++ / MFC Discussion Boards

Bitmap and Device Context

pepeR4-Dec-01 4:39

pepeR

4-Dec-01 4:39

Hey

just want to know what is the easiest way to obtain a bitmap( in fact a handle of a bitmap) from a device context of the client zone of a window in which i have already drawn something
Thx for answer
Bye

Re: Bitmap and Device Context

C^hris L^osinger4-Dec-01 4:43

C^hris L^osinger

4-Dec-01 4:43

get a dc
create a compatible dc (memory dc)
create a compatible bitmap (memory bmp)
select the memory bmp to the memory dc
bitblt from the screen dc to the memory dc

-c

Smaller Animals Software, Inc.

CTime ASSERT

Edilson Vasconcelos de Melo Junior4-Dec-01 4:27

Edilson Vasconcelos de Melo Junior

4-Dec-01 4:27

Hi,
i have this piece of code

>>>>>>>>>>>>>>>>>>>>>>
struct CAddInfo
{
CAddInfo(){}
CAddInfo(const CString& szName, DWORD iSize, bool bDir = false)
:m_szName(szName), m_iSize(iSize), m_bDir(bDir){}
CString m_szName;
bool m_bDir;
DWORD m_iSize;
};
typedef CList<caddinfo, caddinfo=""> CAddInfoList;
CAddInfoList list;
void CJRZipArchive::AddFolder(CString szFolder)
{
try
{
szFolder.TrimRight(_T("\\"));
CFileFind ff;
BOOL b = ff.FindFile(szFolder + _T("\\*"));
CStringArray folders;
while (b)
{
b = ff.FindNextFile();
if (ff.IsDots())
continue;
if (ff.IsDirectory())
{
folders.Add(ff.GetFilePath());
}
else
{
CAddInfo ai;
ai.m_szName = ff.GetFilePath();
CFileStatus fs;
if (CFile::GetStatus(ai.m_szName, fs))
{
ai.m_bDir = false;
ai.m_iSize = fs.m_size;
list.AddTail(ai);
m_iTotal += fs.m_size;
}
}

}
for (int i = 0; i < folders.GetSize(); i++)
{
list.AddTail(CAddInfo(folders[i], 0, true));
// add the folder before adding its files
// it is not needed to add the root folder
AddFolder(folders[i]);
}
}
catch (CException* e)
{
e->ReportError();
e->Delete();
}
catch(...) // thrown in the STL version
{
AfxMessageBox("Error");
}
}
<<<<<<<<<<<<<<<<<<<<<<<
Sometimes, this causes an ASSERT in the line 40 of timecore.cpp (the last ASSERT of a CTime constructor)...
Does anyone know if there is any situation of a file the should cause it?

Thank u very much,
Dirso.

Windows Sockets Question

Aaron Schaefer4-Dec-01 4:02

Aaron Schaefer

4-Dec-01 4:02

Hi All,

I'm having some trouble debugging the following function under Windows 2000 w/ Visual Studio 6.0. Where the function calls the socket API function, the debugger is reporting the following:

HEAP[Sockets.exe]: Heap block at 00140390 modified at 0014070E past requested size of 376
HEAP[Sockets.exe]: Invalid Address specified to RtlReAllocateHeap( 130000, 140398 )

Does anyone see something that I am missing? This function appears to work correctly when executed outside of the debugger (the socket gets bound and can accept connections from other machines), but . . .

Here is the code I am testing:

// Creates a socket in the local machine
SOCKET CreateLocalSocket(int port)
{
SOCKET s = INVALID_SOCKET;
char localHost[256];
hostent* pHostEntry = NULL;
sockaddr_in sa;

// Get the name of this machine
printf("\ngetting local host name . . .");
if(0 != gethostname(localHost, 256))
{
printf("failed.");
return s;
}
else
printf("succeeded.");
printf("\nlocal host name = <%s>", localHost);

// Deprecated function call
printf("\ngetting local host address info . . .");
pHostEntry = gethostbyname(localHost);
if(pHostEntry == NULL)
{
printf("failed.");
return s;
}
else
printf("succeeded.");

// Create a socket
printf("\ncreating socket . . .");
s = socket(AF_INET, SOCK_STREAM, 0);
if(s == INVALID_SOCKET)
{
printf("failed.");
return s;
}
else
printf("succeeded.");

// Set up the socket address struct
memset(&sa, 0, sizeof(sa));
sa.sin_family = pHostEntry->h_addrtype;
sa.sin_port = htons(port);

printf("\nbinding socket . . .");
if(0 != bind(s, (sockaddr*)&sa, sizeof(sa)))
{
printf("failed.");
return s;
}
else
printf("succeeded.");

return s;
}

Thanks in advance for any help.

Problems in Visual C++

Js0n4-Dec-01 3:49

Js0n

4-Dec-01 3:49

Hi to all,I facing some problems when i executed a source code in Visual C++ under MFC environment.Hope someone can help me to solve it.

Well actaully this file is running fine if i compile it under Visual C++ Win32 console application.

But once i put it into Visual C++ MFC environment,it didn't show any error,but it just not fuctioning.

char c;
ofstream modem("COM1:");
printf("Resetting MODEM\n to Dial");
modem << "ATZ\n";
modem.flush();
c = getchar(); // wait for modem to finish
modem <<"ATDT0123246448\n";
modem.flush();
printf(" to Hang-UP\n");
c = getchar(); // wait for modem to finish
modem <<"ATH0\n";
modem.flush();

Hope guru's can help me on this.
Thank you.

Re: Problems in Visual C++

Ravi Bhavnani4-Dec-01 8:38

Ravi Bhavnani

4-Dec-01 8:38

Try using OpenFile() instead. I've used it to talk to a printer on an LPT: port.

/ravi

"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com

Can you have ranges in a switch statement?

Chambers4-Dec-01 1:30

Chambers

4-Dec-01 1:30

Hi guys, I actually have three unrelated questions that I would like answered, they are :

1.) Can you have ranges in a switch statment, i.e.

switch (i)
{
case 0..20 : do something;
case 20..120 : do something;
case 170..450 : do something;
}

Obviously the dotted line doesn`t work, but what do I have to do to get such a switch statement to work?

2.) Is there any way of getting the maximized state of a child window, without using one of the OnDoSomething() functions, i.e. is there a function in MFC which will tell me, true or false, the current child window is maximized?

3.) How can I create one control that holds separate integers in the format :

1 | 2 | 3
3 | 2 | 1
2 | 1 | 3

oh I also would like to know how to make it change size, say to hold five integers accross, and maybe three down.

Thanks for reading this far guys, if you know the answer to any of the three questions, or merely have an idea, please let me know, I would be very grateful.

Thanking you all,
Alan.;)

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

Re: Can you have ranges in a switch statement?

Michael P Butler4-Dec-01 1:51

Michael P Butler

4-Dec-01 1:51

2. Look up CWnd::IsZoomed in MSDN

Michael Smile | :)

Re: Can you have ranges in a switch statement?

Chambers4-Dec-01 2:11

Chambers

4-Dec-01 2:11

Michael your answer to question was Perfect! What a weird name to call it though? I was looking through the MSDN help for IsMaximized etc etc.., ah well you live and learn,

Thanks for the response Michael,
Alan.

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

Re: Can you have ranges in a switch statement?

Alvaro Mendez4-Dec-01 4:59

Alvaro Mendez

4-Dec-01 4:59

1) Nope, you can't do ranges, unfortunately. You need to use an "if" statement.
2) IsZoomed, as answered by Michael.
3) I don't know. You want to create a custom data entry control? Why not use several edit controls placed next to each other?

Regards,
Alvaro

Re: Can you have ranges in a switch statement?

Jon Sagara4-Dec-01 5:18

Jon Sagara

4-Dec-01 5:18

1.)

switch (i)
{
case 0:
case 1:
case 2:
...
case 20:
   // do something
   break;
case 21:
case 22:
... 
case 450:
   // do something
   break;
}

Though you should just use an if statement.

if (/* i is in range 1 */)
   // do something
else if (/* i is in range 2 */)
   // do something else
else
   // do something else else

3.) Try Chris Maunder's Grid Control.

Jon Sagara

"Ninety percent of baseball is mental, the other half is physical." -- Yogi Bera

Re: Can you have ranges in a switch statement?

Chambers4-Dec-01 5:39

Chambers

4-Dec-01 5:39

Thanks for the responses guys, especially for the Grid control link (Jon) cos its pretty much what I need (i need a simplified version, but I`ll just cut it down to that). I didn`t think you could have the ranges in a switch statement (since there are no books that describe how to) so thanks to both Alvaro and Jon for reaffirming my doubts. Oh and thanks to Chris Mauder for actually producing the Grid Control and making it freely available.

Cheers guys,
Alan.

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

Re: Can you have ranges in a switch statement?

Ravi Bhavnani4-Dec-01 5:48

Ravi Bhavnani

4-Dec-01 5:48

Yes, if you use Pascal instead of C/C++ . (Silly answer).
You can also use GetWindowPlacement() for the general case, but IsZoomed() as pointed out earlier, is definitely easier.
In general, you need to override the control's WM_PAINT handler to "do the right thing", i.e. display the numbers in an appropriate format. You can use Chris' grid control, but if you want your class to be lightweight, you'll probably want to just override OnPaint().

/ravi

"There is always one more bug..."
ravib@ravib.com
http://www.ravib.com

Re: Can you have ranges in a switch statement?

Chambers4-Dec-01 6:38

Chambers

4-Dec-01 6:38

In response to your answers :

1. Yep, thats why I asked if you could do it in C++.

2. Its definately the easiest function, and the most appropriate for what I want.

3. I am seriously thinking of doing your OnPaint overriding advice, cos I've had a look at Chris's non-MFC code, and I must be honest, I`m struggling to understand it.

Thanks for your response though,
Alan.

"When I left you I was but the learner, now I am the Master" - Darth Vader Mad | :mad:

A stupid question.

The_Server4-Dec-01 1:26

The_Server

4-Dec-01 1:26

HI, All!!!
=======

MyApp.exe arg1 arg2 arg3

To get those arguments in a console application we do it like this:

void main (int x, char ** y)
{
    ... y[1] ... // arg1
    ... y[2] ... // arg2
    ... y[3] ... // arg3
}

How do we do it in MFC basedialog application ??? Blush | :O

Thanks.

BTW: come to #CodeProject on DalNet (mIRC)

Re: A stupid question.

Michael P Butler4-Dec-01 1:48

Michael P Butler

4-Dec-01 1:48

Have a look at CWinApp::ParseCommandLine in MSDN.

Michael Smile | :)

Re: A stupid question.

Alvaro Mendez4-Dec-01 5:04

Alvaro Mendez

4-Dec-01 5:04

You can use ParseCommandLine like Michael mentioned or the __argc and __argv macros.

Regards,
Alvaro

Re: A stupid question.

RobJones4-Dec-01 10:14

RobJones

4-Dec-01 10:14

I have used GetCommandLine() to do that, but it may not be exactly what you are looking for..

It maybe another option

Rob

edit resources

4-Dec-01 0:49

Do you know how can i have my resources (ex. a Button in a dialog box) in a language such as Greek which needs Unicode?
I want to have buttons in Greek

Using variable argument lists

neilbennevis4-Dec-01 0:36

neilbennevis

4-Dec-01 0:36

Hi,

How do I pass on a variable argument list to another function?

E.g. In the example below I want to pass the variable argument list passed through to PrintOutput() onto fprintf.

PrintOutput(char * format, ...)
{
//I want to pass variable list through to fprintf????
fprintf(stderr, format, ...); //This does not work as it is???????
}

Thanks in advance

Neil

Re: Using variable argument lists

Bill Wilson4-Dec-01 9:53

Bill Wilson

4-Dec-01 9:53

Here's an example from the MFC CString class.

void AFX_CDECL CString::Format(LPCTSTR lpszFormat, ...)
{
	ASSERT(AfxIsValidString(lpszFormat));

	va_list argList;
	va_start(argList, lpszFormat);
	FormatV(lpszFormat, argList);
	va_end(argList);
}

look up va_list and va_arg in MSDN for more info.

Hope this helps,
Bill

how to set a static txt in bold ?

Fred D.3-Dec-01 23:25

Fred D.

3-Dec-01 23:25

hi guys,

i'd like to know how to display a static text in bold (italic, etc.) and also how to change its colour, is it possible ?

thanks to you

Fred

Re: how to set a static txt in bold ?

Michael P Butler4-Dec-01 1:17

Michael P Butler

4-Dec-01 1:17

Have a look at this very useful class,

http://www.codeproject.com/staticctrl/clabel.asp

Michael Smile | :)

Re: how to set a static txt in bold ?

Fred D.4-Dec-01 1:32

Fred D.

4-Dec-01 1:32

thanks Michael, that looks exactly what i want to do.

see you.

LineScroll does not work in subclassed CEdit

Fredrik Skog3-Dec-01 22:40

Fredrik Skog

3-Dec-01 22:40

Hi!

I have got a subclassed CEdit control. When trying to scroll to the last line nothing happens. Also, when inserting text with SetWindowText I get an extra linebreak at the top of the Edit box. Anyone got an idea?

Cheers,

/Fredrik

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