C / C++ / MFC

Christian Graus17-Sep-01 2:51

17-Sep-01 2:51

That is precisely what my GetHeight function looks like and the thing is, it used to work, but now if I break in the function, m_Height always equals 1. I know from opening it in access that the actual values are fine in the database, but now only the string values come out fine.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

Michael P Butler17-Sep-01 3:02

17-Sep-01 3:02

What function fills the class variables with data? Does the data go into the class variables okay?

What happens if your initialise m_Height to 255 in the constructor? Does it still give 1?

Michael Smile | :)

Christian Graus17-Sep-01 3:10

17-Sep-01 3:10

If I make it 255 in the constructor, it still comes out as 1. If I make it 255 in the function, it comes out 255. I traced into my function that reads the data:

	try
	{
		records->CursorType = adOpenStatic;
		records->CursorLocation = adUseClient;
		records->Open("SELECT * FROM FileDatabase",
		_variant_t((IDispatch*)m_Connection, true), adOpenKeyset, adLockOptimistic, 
		adCmdUnknown);
	}
	catch(...)//_com_error & e)
	{
//		MessageBox(NULL, e.ErrorMessage(), "", 0);
	}

	records->MoveFirst();

	vector<ISAFileEntry*> vecDatabase;
	
	do
	{
		CComObject<CSAFileEntry>* pFileEntry = NULL;

		CComObject<CSAFileEntry>::CreateInstance(&pFileEntry);

		if (pFileEntry)
		{
			FieldsPtr spFields = records->GetFields();

			string s = (bstr_t) spFields->Item["FileName"]->Value;
			for (string::iterator it = s.begin(); it != s.end(); ++it)
				 if (*it == '?') *it = '\'';
			pFileEntry->m_FileName = s.c_str();
			pFileEntry->m_FileLength = spFields->Item["FileLength"];
			pFileEntry->m_DownloadCount = spFields->Item["TimesDownloaded"];
			pFileEntry->m_LastModified = spFields->Item["LastModified"];
			pFileEntry->m_Width = spFields->Item["Width"];
			pFileEntry->m_Height = spFields->Item["Height"];
			pFileEntry->m_Frames = spFields->Item["Frames"];
			pFileEntry->m_Seconds = spFields->Item["Seconds"];

and when the data comes out of the database and into the pFileEntry, it is already corrupted, they are already all 1's.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

Michael P Butler17-Sep-01 3:15

17-Sep-01 3:15

I'm not familiar with the database calls so this may be a stab in the dark,

your string is accessed via

string s = (bstr_t) spFields->Item["FileName"]->Value

yet your numbers are dont use the Value variable. Is this right

pFileEntry->m_Height = spFields->Item["Height"];

Michael

Christian Graus17-Sep-01 3:30

Re: Handling Button's Events

17-Sep-01 3:30

Well, how about that ? Thanks so much. I'm half way there now. The File Lengths are loading fine, but the properties I added most recently crash if I put ->Value after them. I guess it's back to the drawing board to try and figure out why.

Thanks again for all the help.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

Handling Button's Events

MAAK17-Sep-01 1:26

MAAK

17-Sep-01 1:26

I needed to handle dialog button's events like WM_MOUSEMOVE and WM_RBUTTONDOWN, so i created a new class inherited form CButton and handled the events easily but the problem is that i couldn't find a way to access the parent dialog's functions so that i can change the dialog's properties, like for example changing a static text. Is there any way to hadle button's events and enable data exchange with the parent dialog?

Michael P Butler17-Sep-01 2:01

How do I find out what workgroup/domain a host is in?

17-Sep-01 2:01

GetParent will give you a pointer to the parent dialog CWnd class. You can then cast it to your dialog class.

CParentDialog* pParent = (CParentDialog*) GetParent();

Paul Vickery17-Sep-01 0:37

Paul Vickery

17-Sep-01 0:37

I am trying to find some code which will enable me to find out what domain or workgroup a given host is in.

There is a function for this on Win2000, but I need it on NT4.

Does anyone have any ideas?

---
"The way of a fool seems right to him, but a wise man listens to advice" - Proverbs 12:15 (NIV)

Re: How do I find out what workgroup/domain a host is in?

Michael P Butler17-Sep-01 2:07

Re: How do I find out what workgroup/domain a host is in?

17-Sep-01 2:07

Not sure if this is what you need,

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/netmgmt/hh/network/ntlmapi2_07zj.asp

Michael Smile | :)

Paul Vickery17-Sep-01 3:20

Paul Vickery

17-Sep-01 3:20

Nearly.

The link you posted (to NetWkstaUserGetInfo) gets info about the user's log-on domain info. However, just near this on MSDN was NetWkstaGetInfo which does the trick.

Thanks,

Paul.
Cool | :cool:

---
"The way of a fool seems right to him, but a wise man listens to advice" - Proverbs 12:15 (NIV)

Ticks in menus

Nick Armstrong17-Sep-01 0:30

17-Sep-01 0:30

When I created my SDI aplication it gives you the choice of having a status bar, if you select yes to this, when your program is created it creates a View menu with a status bar option inside. When you click on this option, a tick appears next to this if the status bar is shown and disappears if not. I wish to copy this functionality with another menu item but cannot work out how it does this in my program, any ideas?

Thanks in advance for any help,

Nick

Rashid Thadha17-Sep-01 0:52

Rashid Thadha

17-Sep-01 0:52

On your OnUpdate handler

use

pCmdUI->SetCheck(m_bCondition);

Tomasz Sowinski17-Sep-01 0:54

17-Sep-01 0:54

In ClassWizard, select the command ID. Then, from the list on the right side, select UPDATE_COMMAND_UI. Create the handler. Inside the handler, call pCmdUI->SetCheck with TRUE or FALSE.

BTW: you should have a look on any MFC tutorial, like Scribble.

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

Nick Armstrong17-Sep-01 2:03

17-Sep-01 2:03

thanks, that worked and I have been able to open and close this dialog from the view menu with the tick being displayed/hidden but how do I get the tick in the menu to disappear when the dialog is closed using the close button on the top-right of the screen. I can handle it using OnClose() in the dialog's class but how do I link it to the menu.

thanks for your help so far,

Nick

Tomasz Sowinski17-Sep-01 2:11

a siple question about initialisation of pointer

17-Sep-01 2:11

ON_UPDATE_CMD_UI handler is called whenever user opens the menu. You have to check the state of the program and pass correct value to CCmdUI::SetCheck.

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

Gérald Mercet17-Sep-01 0:15

Gérald Mercet

17-Sep-01 0:15

I have an application, with several functions, and one of these have to return a pointer on COleDateTime. I know the size of the "array" of COleDateTime dates, 2, but i meet a problem when i start debugging when i look in the debug window.
When i declare in the function a COleDateTime pointer i could use 2 way to do that.
Firstly, i just could write:
COleDateTime pDates[2]; and in the debug window i could see:
pDates
[0]->m_dt
->m_status
[1]->m_dt
->m_status

and in another way i could do it:
COleDateTime *pDates=new COleDateTime[2];

and in debug window i only see that:
pDates
->m_dt
->m_status

So, what is the good way if i want to return 2 dates different?

Thanks in advance

gerald

Re: a siple question about initialisation of pointer

Michael P Butler17-Sep-01 2:11

Display value of member in 'Variable' window

17-Sep-01 2:11

You should be able to see the two dates in the debug window by modifing the debug view to look at,

pDates[0] and pDates[1].

There is no real difference between COleDateTime Dates[2] and COleDateTime* pDates = new COleDateTime[2] (apart from where the allocate memory goes)

Michael Smile | :)

Bartosz Lizak17-Sep-01 0:05

Bartosz Lizak

17-Sep-01 0:05

Hello all,

as I mentioned I would like to display one (specified by me) member value of some class. You can observe this for MFC objects - e.g. CWnd displays value of m_hWnd in curly brackets.
I looked into definitions of some MFC classes (CWnd and CString) and didn't see anything 'magic'.
Does anybody know something about it?

Regards
Bartek

Christian Graus17-Sep-01 0:09

17-Sep-01 0:09

You mean in the debugger ? Just type it into the debug variable window.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

Bartosz Lizak17-Sep-01 0:19

Bartosz Lizak

17-Sep-01 0:19

Hmmm, I wrote bad topic Wink | ;-)

It's not so trivial ... I want to display value of specifed member while in 'Variable' window an object of the class containing this member is listed.

For example:
+this 0x00432990 {CManagersView hWnd=0x004604e6}

Class CManagersView is derrived from CView and automatically displays it's 'primary' member - m_hWnd.

Regards
Bartek

Tomasz Sowinski17-Sep-01 0:27

17-Sep-01 0:27

autoexp.dat located in <vstudio>\common\msdev98\bin contains the 'magic'.

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

Bartosz Lizak17-Sep-01 0:40

Bartosz Lizak

17-Sep-01 0:40

That's it!
Thanks a lot Wink | ;-)

Regards
Bartek

Button background

Nick Armstrong16-Sep-01 23:40

16-Sep-01 23:40

I am creating buttons dynamically in my dialog box by creating them as windows using CreateWindow and putting bitmaps on top of the buttons. This works fine, however, I want to change the background colour of these buttons to a lighter colour. I'm guessing that I use SendMessage but as to which message and parameters I'm lost. Could anybody point me in the right direction. I've checked some articles but they are geared more to using the resource editor or owner-drawn buttons.

Thanks in advance for any help,

Nick

Re: Button background

Tomasz Sowinski16-Sep-01 23:47

16-Sep-01 23:47

Sorry - you can't change the background of the button with one simple SendMessage. And processing WM_CTLCOLORBTN won't help either; here's what MSDN says:
Buttons with the BS_PUSHBUTTON, BS_DEFPUSHBUTTON, or BS_PUSHLIKE styles do not use the returned brush. Buttons with these styles are always drawn with the default system colors. Drawing push buttons requires several different brushes-face, highlight and shadow-but the WM_CTLCOLORBTN message allows only one brush to be returned. To provide a custom appearance for push buttons, use an owner-drawn button.
So, if you need custom background, you have to use owner-draw.

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

Re: Button background

Nick Armstrong16-Sep-01 23:59