C / C++ / MFC Discussion Boards

Re: CListCtrl ficker...

bryce21-Jul-04 17:27

bryce

21-Jul-04 17:27

naah i need to show the images as they arrive but wihtout the flickering Smile | :)

cheers though
Bryce

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Re: CListCtrl flicker...

wb22-Jul-04 4:11

22-Jul-04 4:11

ovveride the folowing

OnEraseBkgnd
OnPaint

in the errasbackground method you should do nothing..
and in the on Paint you should do something like this:

void CIcoListCtrl::OnPaint()
{
	CPaintDC dc(this);
	CRect r;
	GetClientRect(&r);

	CMemDC memDC(&dc,&r);

	
	Errase(&memDC);
	CWnd::DefWindowProc(WM_PAINT,(WPARAM)memDC.m_hDC,0);
	
}

I have a CustomDrawListControl with Icons and the Icons are zooming on mouseenter and mouseleave...
and it dont flicker at all!

I hope this helps..

Standalone mfc application

TallAndyB21-Jul-04 14:22

TallAndyB

21-Jul-04 14:22

OK, If I have read correctly I should be able to take a single executable file from the development environment and use it on another Windows based machine if I statically link with the MFC dlls. I appreciate that this will make it a more cumbersome .exe but it keeps my customer happy. As a final check I will not need any additional dlls to permit database access since I accomplich that using the MFC CRecordset classes. Is this correct?

I currently use the standard edition of VC++ ver6 and think that I have to get the Professional edition to do this. Again before I spend the dollars am I correct?

AndyB

Re: Standalone mfc application

Michael Dunn21-Jul-04 15:03

Michael Dunn

21-Jul-04 15:03

Yes, you need the pro version to link statically with MFC.

--Mike--
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Re: Standalone mfc application

palbano21-Jul-04 16:58

palbano

21-Jul-04 16:58

TallAndyB wrote:
I will not need any additional dlls to permit database access since I accomplich that using the MFC CRecordset classes. Is this correct?

I don't believe that will be correct. It's been a long time but you should need files for whatever database product you are using. Also CRecordset uses ODBC I believe, so all of that has to be installed.

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Multiline editbox

Spank me!!21-Jul-04 13:16

Spank me!!

21-Jul-04 13:16

Hello, I have an editbox that is in a child dialog – this child dialog is a “cancel test” type screen having a single button that when pushed cancels a long series of calculations, and a single multilane editbox that receives information from my main program and displays them in a multilane form.

Here is my problem: I can get the multilane part to work great, but I always have to scroll down to see the most recent message. For example, if I were to make an editbox that is only tall enough to print a single line, then I will always see the very first string that I sent to the editbox – I am wanting to see the most recent string, not the oldest.

I know I need to use something like pcanceldlg->LineScroll(1, 0); but I always get an error saying LineScroll' : is not a member of 'CCancelBoxDlg' If anyone can help me with how to use the LineScroll function in a child dialog I would greatly appreciate it.

If it helps any, here is the code I am using to send the strings:

pcanceldlg->GetDlgItemText(1015, s_oldprogress);<br />
  s_newprogress = s_oldprogress + "\r\n" + s_progress;<br />
  pcanceldlg->SetDlgItemText(IDC_MOVEMENTDIALOG, s_newprogress);

Thanks,

Loren

Re: Multiline editbox

Alexander Wiseman21-Jul-04 15:38

Alexander Wiseman

21-Jul-04 15:38

Hi,

LineScroll is a member of the CEdit class, not CDialog, which is why when you try to call the function using the dialog pointer, you get a syntax error. To call LineScroll, therefore, you need to have the CEdit control variable or a pointer to it. Try this instead:

<br />
CEdit *myEdit = ((CEdit*)GetDlgItem(IDC_MOVEMENTDIALOG));<br />
<br />
// You can now call LineScroll; note that the following call only scrolls the edit control 1 verical line<br />
myEdit->LineScroll(1, 0);<br />

Hope that helps!

Sincerely,
Alexander Wiseman

Est melior esse quam videri
It is better to be than to seem

Re: Multiline editbox

Harold Bamford23-Jul-04 11:05

Harold Bamford

23-Jul-04 11:05

Sounds very much like an editbox I'm using to log messages. This is how I scroll to the bottom of the editbox.

// Scroll the last line into view
int len = m_SystemStatus.GetWindowTextLength();
m_SystemStatus.SetSel(len,len,FALSE);	// scroll last line into view

Database Update????? Urgent

Small Rat21-Jul-04 12:46

Small Rat

21-Jul-04 12:46

Hi,

I want to use CDatabase::ExecuteSQL to execute a update sql statement to Access database.
I use the following sql statement.

sql="update table_name set col_name=\"dd'ee\" where id=1";

(the content of col_name has a ')

it doesn't work.

Please help me solve the problem!!

thanks a lot!!

Alan

Re: Database Update????? Urgent

palbano21-Jul-04 16:34

palbano

21-Jul-04 16:34

Did you test the SQL statement in Access?

It looks like there might be an error in it. It appears you have an apostrophe character in the string value for the col_name field. I am not positive but i seem to remember that Access and other relational DB's do not support that character in string data.

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Re: Database Update????? Urgent

Small Rat21-Jul-04 16:49

Small Rat

21-Jul-04 16:49

Yes, I test sql statement, it works.

Re: Database Update????? Urgent

TaknuMone22-Jul-04 2:03

TaknuMone

22-Jul-04 2:03

Try this syntax:

strQuery = "UPDATE employees "
strQuery += "SET employee_lastname = " + m_Value;
strQuery += "WHERE employee_id = " + nEmpId;

remove those slashes

TaknUmone

Re: Database Update????? Urgent

Small Rat23-Jul-04 18:39

Small Rat

23-Jul-04 18:39

but we have use ''/"" to the char column.
because the content of the column include a ', so I change teh one pair of '' to "".

Re: Database Update????? Urgent

palbano22-Jul-04 5:47

palbano

22-Jul-04 5:47

alanshen209 wrote:
it doesn't work.

What does that mean? Does it throw an exception?

"No matter where you go, there your are." - Buckaroo Banzai

-pete

Re: Database Update????? Urgent

Small Rat23-Jul-04 18:40

Small Rat

23-Jul-04 18:40

when I run my sql statement, I got a error msgbox.

C++ file i/o

Anonymous21-Jul-04 12:06

Anonymous

21-Jul-04 12:06

if i am using ofstream out("hello") this would wirte a file to the project file i'm working in. is there a way to send this to another file ... say c:\program files\
thanks
shawn Confused | :confused:

Re: C++ file i/o

bryce21-Jul-04 16:34

bryce

21-Jul-04 16:34

err do you mean you want to

ofstream out("c:\\program files\\hello.txt") or soemthing?
Bryce

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C compiler

---Mark---21-Jul-04 10:53

---Mark---

21-Jul-04 10:53

I realize this may not be the most appropriate place to post this but it ties in.

Does any body know about a good C compiler for free??
Just regular C, because I am going to start from C and work myself into C++.

-Thanks Smile | :)

Mark

As you journey through life take a minute every now and then to give a thought for the other fellow.
He could be plotting something.
-Hagar the Horrible

Re: C compiler

dzenad21-Jul-04 11:41

dzenad

21-Jul-04 11:41

Bloodshed Dev-C++ is a full-featured Integrated Development Environment (IDE) for the C/C++ programming language. For Windows 95, 98, NT, 2000, XP.
It's been used in my Comp. Science classes since it is freeware.
You can download it here: http://www.bloodshed.net/dev/devcpp.html[^]

Re: C compiler

Michael Dunn21-Jul-04 11:42

Michael Dunn

21-Jul-04 11:42

GCC is the standard on Unix (you can get it in the Cygwin package), there's also DJGPP which can make DOS executables.

--Mike--
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Re: C compiler

Timothy Grabrian23-Jul-04 14:10

Timothy Grabrian

23-Jul-04 14:10

http://www.compilers.net/

wWw.KruncherInc.cOm - My cool programs

problem in my message box

magee8121-Jul-04 10:40

magee81

21-Jul-04 10:40

Hai,
I have created my own message box (a dialog with its proc). Now the problem is the control is not returning automatically to the original parent window after closing the message box unless I do some action like clicking a button in the parent window.What do I have to do.
Thanks a lot in advance.

Re: problem in my message box

David Crow21-Jul-04 10:56

David Crow

21-Jul-04 10:56

Is the dialog modal or modeless? Did you specify a parent when it was created?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: problem in my message box

magee8121-Jul-04 11:15

magee81

21-Jul-04 11:15

Yeah, I specified the parent. My dialog is modeless dialog.
What should I do? Thanks.

Re: problem in my message box

mark_mgh21-Jul-04 16:02

mark_mgh

21-Jul-04 16:02

destory the child window, delete the object, and release the resourse automatically.

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