Re: causing a CScrollView to scroll by dragging the mouse outside client area - C / C++ / MFC Discussion Boards

How to load Child Dialog before program

catngo22-Feb-04 20:19

catngo

22-Feb-04 20:19

How do you load the pop-up (child) dialog before the program like the login screen?

Re: How to load Child Dialog before program

Balkrishna Talele22-Feb-04 23:58

Balkrishna Talele

22-Feb-04 23:58

You need to call dialog in
BOOL CMyClass::InitInstance()
{

CChildDialog dDlg;
dDlg.DoModal()

.
.
.
.
}

regards
Balkrishna Talele

Re: How to load Child Dialog before program

catngo23-Feb-04 21:49

catngo

23-Feb-04 21:49

How do I exit program when it only load the child dialog? either click OK or CANCEL for the X box, it still load the Main program. I try to use DestroyWindow() function but it give error.

Socket problem...

Prakash Nadar22-Feb-04 19:34

Prakash Nadar

22-Feb-04 19:34

I have a socket i am using normal blocking sockets (brekley sockets). I want to know before i call recv wheather it will become a blocking one or not. so that the socket dont block at that instance coz it is causing threading locking.

Is there any way to provide a timeout to the sockets..
i am not using MFC and so mfc CSocket is not a solution.

"When death smiles at you, only thing you can do is smile back at it" - Russel Crowe (Gladiator)

Re: Socket problem...

Anonymous22-Feb-04 21:02

Anonymous

22-Feb-04 21:02

Try using "select" call+FD_SET

Re: Socket problem...

Prakash Nadar22-Feb-04 21:56

Prakash Nadar

22-Feb-04 21:56

Thanx i guess this will solve my problem..
Smile | :)

1.Why do people not wearing a wrist watch look at their wrist for time when people ask for time.
2.Why do people ask for time from people who are not wearing a wrist watch.
Prakash,
India.

causing a CScrollView to scroll by dragging the mouse outside client area

mickelliot22-Feb-04 14:07

mickelliot

22-Feb-04 14:07

Hi,

I have a CScrollView set up in one pane of an MDI splitterwindow application.

I would like the user to be able to scroll the view by clicking inside the CScrollView then dragging the mouse outside the client area. To see an example of what I mean, load up ms excel, click on a cell, then drag outside the child window (or outside the main frame of the application).

I thought I could do this by using "onmousemove" messages, calculating which way the user has dragged, and scrolling accordingly, but unfortunately I can't receive mouse coordinates when the user is outside the client area, and I only want the scrolling to occur when the user has dragged off the side of the CScrollView.

Any help would be GREATLY appreciated, thanks for your time.

Mick

Re: causing a CScrollView to scroll by dragging the mouse outside client area

Ryan Binns22-Feb-04 17:19

Ryan Binns

22-Feb-04 17:19

You can use OnMouseMove() but you'll have to call SetCapture() first to capture the mouse input. Make sure you call ReleaseCapture() when you've finished.

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: causing a CScrollView to scroll by dragging the mouse outside client area

mickelliot23-Feb-04 5:06

mickelliot

23-Feb-04 5:06

Thanks Ryan, that's just what I needed. It had been troubling me for days!

Thanks a lot

Mick

Re: causing a CScrollView to scroll by dragging the mouse outside client area

Ryan Binns23-Feb-04 21:57

Ryan Binns

23-Feb-04 21:57

You're welcome Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Help

Goh Hui Beng22-Feb-04 14:00

Goh Hui Beng

22-Feb-04 14:00

/ Initialize data form parameters
char* szFileName = argv[1]; // bitmap image's file name

// Bitmap image container
CBMPImage SrcImage;

// Loading bitmap image from file
bool ResLoad = SrcImage.LoadBMP24Image(szFileName);

Can someone explain to me wat this part of the code means..I have been trying to find out which part of this code i should change to put in my own image file

Re: Help

Ravi Bhavnani22-Feb-04 14:37

Ravi Bhavnani

22-Feb-04 14:37

char* szFileName = _T("C:\\myfile.bmp"); should do it.

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

Re: Help

Goh Hui Beng22-Feb-04 15:52

Goh Hui Beng

22-Feb-04 15:52

When I do what u suggest, I got error which says _T is not defined integer.

Re: Help

Steve S22-Feb-04 22:25

Steve S

22-Feb-04 22:25

Try adding

#include <tchar.h>

after the #include for windows.h

Steve S

Document/View Architecture - having 1doc and 2 Views

Ehsan Baghaki22-Feb-04 13:42

Ehsan Baghaki

22-Feb-04 13:42

i just want to know if this is possible to have another View Class in MDI and make some Child window that uses this View Class.

for example a list classes in a MDI:
CChildFrame
CMainFrame
CMyDoc
CMyView -> base class are CView
CMy2View -> i added this View Class that its base is not the same as CMyView base class and i want to have a Child Window that use this view class.

is this possible or any suggestion?

thanks in advance. Smile | :)

Re: Document/View Architecture - having 1doc and 2 Views

Ehsan Baghaki22-Feb-04 22:18

Ehsan Baghaki

22-Feb-04 22:18

i findout smthing, i have to set a Base class to both CMDIChildWnd and my own base class. and it seems that i have to Set BEGIN_MESSAGE_MAP(CMy2View, CMDIChildWnd)
is it true that the only way that a Child Window obey a View class is to make it with this line : CMDIChildWnd::Create(...)

So to having a ChildWindow i have to set base to CMDIChildWnd and then i will lose my own base class, i mean i cant use OnPaint() Coz i have to set Message map to CMDIChildWnd. Confused | :confused:

Any Suggestion ?

Parallel port & EPP

jane69smith22-Feb-04 11:14

jane69smith

22-Feb-04 11:14

I am working on an external device that I'm trying to interface through the parallel port. To get adequate speeds, I'm looking to use EPP instead of regular CENTRONICS. The problem is, I get the following output when I try to write to the port after negotiating the protocol.

<br />
Opening LPT1... OK<br />
Querying LPT1 Status...<br />
Status: 80<br />
Setting EPP Mode...<br />
Querying LPT1 Mode...<br />
Read Status: 40<br />
Write Status: 40<br />
Sending data...<br />
Error: Incorrect function.<br />
<br />
Sent 0 values<br />
Sending complete...<br />

The Read and Write status indicate that I've negotiated to EPP. However, I get the shown error. Here is the code snippet of what I'm doing

<br />
printf("Opening LPT1...\t");<br />
hParPort = CreateFile("LPT1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);<br />
<br />
printf("Querying LPT1 Status...\n");<br />
PAR_QUERY_INFORMATION ParInfo;<br />
DeviceIoControl(hParPort, IOCTL_PAR_QUERY_INFORMATION, NULL, 0, &ParInfo, sizeof(ParInfo), &ret, NULL);<br />
printf("Status: %x \n", ParInfo.Status);<br />
<br />
printf("Setting EPP Mode...\n");<br />
PARCLASS_NEGOTIATION_MASK parMode;<br />
PARCLASS_NEGOTIATION_MASK parModeBack;<br />
parMode.usReadMask = EPP_ANY;<br />
parMode.usWriteMask = EPP_ANY;<br />
DeviceIoControl(hParPort, IOCTL_IEEE1284_NEGOTIATE, &parMode, sizeof(parMode), &parModeBack, sizeof(parModeBack), &ret, NULL);<br />
printf("Read Status: %x \n", parModeBack.usReadMask);<br />
printf("Write Status: %x \n", parModeBack.usWriteMask);<br />
<br />
printf("Sending data...\n");<br />
<br />
if(!WriteFile(hParPort, data, 1, &ret, NULL))<br />
{<br />
    //--- Print FormatMessage(GetLastError()) ---<br />
}<br />
printf("Sent %d values \n", ret);<br />
printf("Sending complete...\n");<br />
CloseHandle(hParPort)<br />

Any ideas as to why I get an invalid function and what I can try instead of WriteFile?

Jane

How to determine whether master volume is enabled?

Artem Moroz22-Feb-04 10:48

Artem Moroz

22-Feb-04 10:48

I'm using class CVolumeOutMaster - it sets and gets master volume. The class could be found here: http://www.codeproject.com/audio/volumeclasses.asp

It determines the volume like this:

DWORD CVolumeOutMaster::GetCurrentVolume()
{
	if ( !m_bAvailable )
		return BAD_DWORD;
	MIXERCONTROLDETAILS_UNSIGNED* aDetails =  (MIXERCONTROLDETAILS_UNSIGNED*)malloc(m_nChannelCount*sizeof(MIXERCONTROLDETAILS_UNSIGNED));
	if ( !aDetails )
		return BAD_DWORD;
	MIXERCONTROLDETAILS ControlDetails;
	memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
	ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
	ControlDetails.dwControlID = m_dwVolumeControlID;
	ControlDetails.cChannels = m_nChannelCount;
	ControlDetails.cMultipleItems = 0;
	ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
	ControlDetails.paDetails = &aDetails[0];
	MMRESULT mmResult = mixerGetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, MIXER_GETCONTROLDETAILSF_VALUE );
	DWORD dw = aDetails[0].dwValue;
	free( aDetails );
	if ( mmResult != MMSYSERR_NOERROR )
	{
		TRACE(".MasterOutputVolume: FAILURE: Could not get volume. mmResult=%d\n", mmResult );
		return BAD_DWORD;
	}
	return dw;
}

How to determine whether master volume is enabled or disabled?

Destructing an exception

Ravi Bhavnani22-Feb-04 9:57

Ravi Bhavnani

22-Feb-04 9:57

My app leaks a CArchiveException when an (expected) exception occurs. If I try to fix the leak by deleting the exception (using either [a] or [b]), the framework ASSERTs that the exception isn't ready for deletion. Any clues as to how I can fix the leak?

status = Success;
// CException* pExcToDelete = NULL;
try {
  if (pArchive->IsStoring())
     (*pArchive) << m_tmLogin;
  else
     (*pArchive) >> m_tmLogin;
}
catch (CException* pExc) {
  // pExcToDelete = pExc;
  // delete pExcToDelete;  <-- [a]
  status = Error;
}
// delete pExcToDelete;  <-- [b]
return (status);

Thanks,

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

Re: Destructing an exception

Artem Moroz22-Feb-04 10:51

Artem Moroz

22-Feb-04 10:51

call pExc->Delete() inside catch block

Re: Destructing an exception

Ravi Bhavnani22-Feb-04 10:56

Ravi Bhavnani

22-Feb-04 10:56

Ahh... thanks! Rose | [Rose]

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

displaying in string in hex

lyn22-Feb-04 7:35

lyn

22-Feb-04 7:35

hello..
i want to display whatever user input in the edit box to hex with a click of a button.. i want to display the characters in ascii codes..
can someone teach me how to do it?
thankss Big Grin | :-D

~wilD cat~

Re: displaying in string in hex

Ehsan Baghaki22-Feb-04 13:53

Ehsan Baghaki

22-Feb-04 13:53

http://www.experts-exchange.com/Programming/Programming_Languages/Cplusplus/Q_20645650.html

http://www.codeproject.com/cpp/data_conversions.aspby VGirish

hope this helps

Bitmap Operate On Window 98

Best Friend22-Feb-04 6:11

Best Friend

22-Feb-04 6:11

Who can help my for below this code it just can operate window 2000, Xp or above. Now my problem is how I can modify this code to operate on Window 98 because my PC is using Window98. OR you has any example like this.
if (nIDEvent == 1)
{
CBitmap m_bmp;
m_bmp.LoadBitmap(IDB_BITMAP1);
m_bitmap.SetBitmap(m_bmp);
KillTimer(2);
SetTimer(2, 500, 0);
}
else if (nIDEvent == 2)
{
CBitmap m_bmp;
m_bmp.LoadBitmap(IDB_BITMAP2);
m_bitmap.SetBitmap(m_bmp);
KillTimer(2);
SetTimer(1, 500, 0);
}

Thanks.

Re: Bitmap Operate On Window 98

Ryan Binns22-Feb-04 17:32

Ryan Binns

22-Feb-04 17:32

This code should work correctly on Windows 98. Is it working?

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

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