C / C++ / MFC Discussion Boards

Iain Clarke, Warrior Programmer5-Jan-09 3:53

5-Jan-09 3:53

Printing is heavily abstracted in windows - this is one of the main selling points they had waaaaaaay back when. But that means you shove data at the print spooler - and you know when that is finished.

But that may then shove data at some remote machine which may or may not complete then.

That may then go to a fancy print system which could batch your print for late at night, for its own convenience.

None of this gets fed back to you.

You could do this:

while (1)
{
  if (MessageBox (_T("Has the paper come out yet?"), MB_YESNO | MB_ICONQUESTION) == IDYES)
     break;
}

Being slightly serious, the OnCmdMsg (ID_FILE_PRINT, 0, 0, 0) shouldn't return until it's finished its bit of the printing process.

Iain.

Re: SDI app: Wait for printer

nobaq5-Jan-09 4:41

nobaq

5-Jan-09 4:41

Hello and thank you for your answer!

I do not want to check if the document has printed successfully but it should just be successfully appended to the queue (before the new document is loaded).

I think I managed this (the following code is done in a modal dialog):

// pView is a pointer to my current view (CHtmlView)

// get currently loaded document
CString currentUrl = pView->GetLocationURL();
// load document to be printed
pView->Pall();
// wait until the document has loaded successfully
while(pView->GetReadyState() != READYSTATE_COMPLETE)
{
     ((CMyApp*)AfxGetApp())->Yeild();
}
// FIXXXME: IS THIS OPERATION REALLY BLOCKING?
pView->OnCmdMsg(ID_FILE_PRINT, 0, 0, 0);
// restore old document
pView->Navigate(currentUrl);
// return to my app
EndDialog(FALSE);

The OnCmdMsg(ID_FILE_PRINT) does nothing more than ExecWB(OLECMDID_PRINT,...) in the IWebBrowser2.

And now my "backup question" is.

You said:
"Being slightly serious, the OnCmdMsg (ID_FILE_PRINT, 0, 0, 0) shouldn't return until it's finished its bit of the printing process."

Are you sure that ExecWB(OLECMDID_PRINT,...) will block until the currently loaded document has been printed so that I can issue the next Navigate(...) call just afterwards?

In my tests it works but I am not sure about this.

Regards,
Niki

Re: SDI app: Wait for printer

Iain Clarke, Warrior Programmer5-Jan-09 5:04

Iain Clarke, Warrior Programmer

5-Jan-09 5:04

I confess I have not printed from an HtmlView, so take my logic with some skepticism.

From the docs:
Executes a command on an OLE object and returns the status of the command execution using the IOleCommandTarget interface.

It does not say "queue up some thready thing". So S_OK, means the job is *done*.

Iain.

Re: SDI app: Wait for printer

Randor 5-Jan-09 4:52

Randor

5-Jan-09 4:52

You could obtain a PRINTER_INFO_2[^] structure which contains the number of jobs in the printer que. The Status member should return PRINTER_STATUS_PRINTING while printing and PRINTER_STATUS_WAITING when finished.

If you wanted to track individual print jobs you could use the JOB_INFO_1[^] or other associated print job structures to track the job. The Status member will return JOB_STATUS_PRINTED when the job has completed. It should be noted that older printers and/or port monitor drivers may always return JOB_STATUS_PRINTED information for job status. Your mileage may vary.

Some documentation:
http://support.microsoft.com/kb/158828[^]

Some sample code:

#include <winspool.h>
/************************************************************************************
	HANDLE OpenDefaultPrinter(ACCESS_MASK dwMask)
	Returns a HANDLE to the Default system printer. The caller must Close the HANDLE.
	-David Delaune 12-06-2006
*************************************************************************************/
HANDLE YourClass::OpenDefaultPrinter(ACCESS_MASK dwMask)
{
	HANDLE hPrinter = INVALID_HANDLE_VALUE;
	PRINTER_DEFAULTS pDef;
	DWORD dwSize;

	ZeroMemory(&pDef, sizeof(pDef));
    GetDefaultPrinter(NULL, &dwSize);
    
	TCHAR* szBuffer = new TCHAR[dwSize];

	if(NULL != szBuffer)
	{
		if(GetDefaultPrinter(szBuffer, &dwSize))
		{
			pDef.DesiredAccess = dwMask;
			OpenPrinter(szBuffer, &hPrinter, &pDef);
		}
		delete szBuffer;
	}
	return hPrinter;
}

/************************************************************************************
	DWORD GetPrintQueCount()
	Returns the number of waiting print jobs in the Default printer que.
	-David Delaune 12-06-2006
*************************************************************************************/
DWORD YourClass::GetPrintQueCount()
{
	DWORD dwNeeded = NULL;
	PRINTER_INFO_2 *pInfo = NULL;
	DWORD dwRet = 0;

	HANDLE hPrinter = OpenDefaultPrinter();

	if(INVALID_HANDLE_VALUE != hPrinter)
	{
		GetPrinter(hPrinter, 2, (LPBYTE)pInfo, 0, &dwNeeded);

		if(0 < dwNeeded)
		{
			pInfo = static_cast<PRINTER_INFO_2 *>(GlobalAlloc(GPTR, dwNeeded));
			if(NULL != pInfo)
			{
				if(GetPrinter(hPrinter, 2, (LPBYTE)pInfo, dwNeeded, &dwNeeded))
				{
					dwRet = pInfo->cJobs;
				}
			}
			GlobalFree(pInfo);
		}
		ClosePrinter(hPrinter);
	}
	return dwRet;
}

Good Luck,
-David Delaune

Doubt in using CToolTipCtrl

KASR15-Jan-09 0:56

KASR1

5-Jan-09 0:56

How to change rectangle backround of tooltip window to other shape?

Re: Doubt in using CToolTipCtrl

Iain Clarke, Warrior Programmer5-Jan-09 0:59

Iain Clarke, Warrior Programmer

5-Jan-09 0:59

Have a look at TTS_BALLOON.

Beyonf that, do a search here on codeproject for all sorts of tooltip replacements. The built in class is handy, but it runs out of unsefulness VERY rapidly.

Iain,

Re: Doubt in using CToolTipCtrl

KASR15-Jan-09 1:07

KASR1

5-Jan-09 1:07

ok. Thanks for your reply.

Hardware info about the network controllers

Pasy_m4-Jan-09 23:29

Pasy_m

4-Jan-09 23:29

System: Windows XP / Vista / 32 / 64
Language: C++

I need information about all network controllers
of the PC my application is running on.
(Usually 1 onBoard and 1 additional network card)
And I need their maximum transfer rate
(10MBit, 100MBit or 1GBit)

I already know how to get their IP-addresses
with gethostbyname() and the h_addr_list.
But on that way I don't get any info about their
maximum speed. (maybe the card is a 1GBit controller,
but it is connected with a 100MBit switch...
then the current max. speed should be 100MBit)

Thanks for your help

Big Grin | :-D

Re: Hardware info about the network controllers

Hamid_RT5-Jan-09 0:37

Hamid_RT

5-Jan-09 0:37

Pasy_m wrote:
Hardware info about the network controllers

Did you see Computer System Hardware Classes (Windows)[^]?

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: Hardware info about the network controllers

Randor 5-Jan-09 5:14

Randor

5-Jan-09 5:14

The MIB_IFROW Structure[^] can tell you the network speed for each device.

Sample usage:

#include "Iphlpapi.h"
#pragma comment(lib, "iphlpapi.lib")

VOID CNetworkToolBox::EnumNetworkSpeeds()
{
   BYTE *pBuf=NULL;
   DWORD dwSize=0;
   DWORD dwResult=0;
   PMIB_IFTABLE pMIBTable;

   GetIfTable(NULL,&dwSize,FALSE);
   pBuf=new BYTE[dwSize];
   pMIBTable=reinterpret_cast <PMIB_IFTABLE >(pBuf);
   CString szBuf;

   if(NO_ERROR == GetIfTable(pMIBTable,&dwSize,FALSE))
   {
      for(UINT i=0; i < pMIBTable->dwNumEntries; ++i)
      {
         if(MIB_IF_TYPE_LOOPBACK != pMIBTable->table[i].dwType)
         {
            if(MIB_IF_OPER_STATUS_CONNECTED == pMIBTable->table[i].dwOperStatus
				|| MIB_IF_OPER_STATUS_OPERATIONAL == pMIBTable->table[i].dwOperStatus)
            {
               szBuf.Format("%d@%s",pMIBTable->table[i].dwIndex,pMIBTable->table[i].bDescr);
               TRACE2(_T("%s network speed in bits per second: %ld\n"),szBuf,pMIBTable->table[i].dwSpeed);
            }
         }
      }
   }
   delete []pBuf;
}

Best Wishes,
-David Delaune

Re: Hardware info about the network controllers

David Crow5-Jan-09 8:03

David Crow

5-Jan-09 8:03

Pasy_m wrote:
(maybe the card is a 1GBit controller,
but it is connected with a 100MBit switch...
then the current max. speed should be 100MBit)

The overall throughput will be 100M, but the NIC itself will be 1G to the switch.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Access Violation ....Very Interesting

Aabid4-Jan-09 23:11

Aabid

4-Jan-09 23:11

This Code gives output as Access violation ...Can anybody tell me what is wrong there....

#include <windows.h>
#include <stdio.h>
void main()
{
char * szTemp, *cmdline;

cmdline = (char *)malloc(sizeof (char) * 1000);
if(cmdline)
{
strcpy(cmdline, "skdjofhdsjfodhfjdhgkjfhgkjdfhgkfhgkjdfhgk");
int len = strlen(cmdline);

szTemp = (char *)malloc(sizeof (len) + 1);
if(szTemp)
{
strcpy(szTemp, cmdline);
puts(szTemp);
}
}
if(cmdline)
{
free(cmdline);
cmdline = NULL;
}
if(szTemp)
{
//Access Violation When We Free szTemp
free(szTemp);
szTemp = NULL;
}

return;
}

Re: Access Violation ....Very Interesting

CPallini4-Jan-09 23:16

CPallini

4-Jan-09 23:16

Oh, yes, it is veeeeery interesting.
Big Grin | :-D

BTW: The error is in the line below, can you spot it?

Aabid wrote:
szTemp = (char *)malloc(sizeof (len) + 1);

Hint: sizeof(len) is 4!
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Access Violation ....Very Interesting

ThatsAlok4-Jan-09 23:26

ThatsAlok

4-Jan-09 23:26

Aabid wrote:
szTemp = (char *)malloc(sizeof (len) + 1);

I believe it should be (char *)malloc(sizeof (char)* len + 1);. actually you need to have buffer copy commandline into szTemp. but instead of allocating proper buffer to it, you are allocating on buffer for 4 character + 1 for NULL.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: Access Violation ....Very Interesting

CPallini4-Jan-09 23:42

CPallini

4-Jan-09 23:42

ThatsAlok believe it should be (char *)malloc(sizeof (char)* len + 1);.

That should be

sizeof(char) * (len+1)

if sizeof(char) was indeed relevant... Roll eyes | :rolleyes:

Pardon my nitpick attitude. Big Grin | :-D

Re: Access Violation ....Very Interesting

ThatsAlok4-Jan-09 23:48

ThatsAlok

4-Jan-09 23:48

CPallini wrote:
if sizeof(char) was indeed relevant...

Yeap i know.. Old programming bad-habit Smile | :)

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: Access Violation ....Very Interesting

CPallini5-Jan-09 1:16

CPallini

5-Jan-09 1:16

Actually it is a good habit and proves helpful when dealing with TCHARs.
Big Grin | :-D

Re: Access Violation ....Very Interesting

Radhakrishnan G.4-Jan-09 23:39

Radhakrishnan G.

4-Jan-09 23:39

Please check the statement
szTemp = (char *)malloc(sizeof (len) + 1);
check with following
szTemp = (char *)malloc(len + 1);

Re: Access Violation ....Very Interesting

Radhakrishnan G.4-Jan-09 23:40

Radhakrishnan G.

4-Jan-09 23:40

sorry I was late..
Please ingnoe

#pragma

zon_cpp4-Jan-09 22:58

zon_cpp

4-Jan-09 22:58

Hi!
how do i work with

#pragma

command, to ignore a warning number in my project? (in Compiling)
please help me

Zo.Naderi-Iran

Re: #pragma

CPallini4-Jan-09 23:12

CPallini

4-Jan-09 23:12

What about documentation [^]?
Smile | :)

Re: #pragma

ThatsAlok4-Jan-09 23:23

ThatsAlok

4-Jan-09 23:23

you....... hummm Poke tongue | ;-P

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: #pragma

ThatsAlok4-Jan-09 23:22

ThatsAlok

4-Jan-09 23:22

// Disable warning messages 4507 and 4034.
#pragma warning( disable : 4507 34 )

// Issue warning 4385 only once.
#pragma warning( once : 4385 )

// Report warning 4164 as an error.
#pragma warning( error : 164 )

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: #pragma

zon_cpp4-Jan-09 23:30

zon_cpp

4-Jan-09 23:30

thanks
but, where i write this command in my MFC project?

Zo.Naderi-Iran

Re: #pragma

ThatsAlok4-Jan-09 23:47

ThatsAlok

4-Jan-09 23:47

you can write this in any header/C/C++ file, above your code!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

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