CListBox WM_MEASUREITEM problems - C / C++ / MFC Discussion Boards

monrobot132-Oct-02 16:41

2-Oct-02 16:41

As far as what I've seen (I just checked the resource editor) you can only select a descending order in a CListCtrl, but I haven't seen anything for a CListBox. If there isn't one that's just fine but if there is that would be great.

- monrobot13

Re: Sorting listboxes descending

Ravi Bhavnani3-Oct-02 4:59

Ravi Bhavnani

3-Oct-02 4:59

Argh! I need more sleep! Sorry, I was thinking CListCtrl. Hmm, now that it's been mentioned, why not use it instead of CListBox? Smile | :)

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Sorting listboxes descending

monrobot133-Oct-02 13:26

monrobot13

3-Oct-02 13:26

Ravi Bhavnani wrote:
Hmm, now that it's been mentioned, why not use it instead of CListBox?

To tell the truth I'm not really sure of the difference between the two so I just chose the listbox since all I need to do is display a list of items.

- monrobot13

Re: Sorting listboxes descending

Ravi Bhavnani3-Oct-02 15:26

Ravi Bhavnani

3-Oct-02 15:26

A CListCtrl is a much more powerful form of CListBox. I prefer it over the circa Windows 3.1 list box implementation.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Sorting listboxes descending

monrobot135-Oct-02 8:39

monrobot13

5-Oct-02 8:39

Alright I guess I'll switch the conrol over to a CListCtrl

Thanks!

- monrobot13

Re: Sorting listboxes descending

Debs3-Oct-02 0:00

Debs

3-Oct-02 0:00

I'm not aware of any in MFC6. If you want anything other than the default sort (i.e. alphabetic, ascending), then you need to implement an owner drawn list box and write a custom OnCompareItem method.

Re: Sorting listboxes descending

monrobot133-Oct-02 2:17

monrobot13

3-Oct-02 2:17

Alright sounds good. Thanks for the info.

- monrobot13

CListBox WM_MEASUREITEM problems

alex.barylski2-Oct-02 13:34

alex.barylski

2-Oct-02 13:34

How can I can force the control to send itself a WM_MEASUREITEM message each time it is resized...?

Currently default implementation only fires off a WM_MEASUREITEM at the time of creation and thats it...I need it to fire whenever the control is resized...???

I have the following code (from which I stole from Changing Row Height in an owner drawn Control
By Uwe Keim ) inside my CListBox::OnSize()

CListBox::OnSize(nType, cx, cy); 
		
// Prepare control for custom WM_MEASUREITEM
CRect rc;
GetWindowRect( &rc );

WINDOWPOS wp;
wp.hwnd  = m_hWnd;
wp.cx    = rc.Width();
wp.cy    = rc.Height();
wp.flags = SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOZORDER;

// Force control to receive WM_MEASUREITEM on resizes
SendMessage( WM_WINDOWPOSCHANGED, 0, (LPARAM)&wp );

// Redraw display
Invalidate(FALSE);

However when the code executes I get an exception:

First-chance exception in Timeline2.exe (KERNEL32.DLL): 0xC00000FD: Stack Overflow.

Any ideas as to why this is happening...? Or atleast another way of forcing the control to receive WM_MEASUREITEM on control resizes...?

Thanx a million!

Cheers! Smile | :)

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: CListBox WM_MEASUREITEM problems

Shog⁹2-Oct-02 14:18

Shog⁹

2-Oct-02 14:18

Well, you'll keep recursing if you send yourself WM_WINDOWPOSCHANGED, as it will trigger OnSize() to be called again, which will send the message again, etc. etc.

What's worked well for me in the past is not bothering with triggering additional WM_MEASUREITEM messages. Instead, move the code from WM_MEASUREITEM into a generic routine (say, CalcItemHeight()) that will calculate the size of an item. Call this routine from WM_MEASUREITEM, and then also loop in OnSize() , calling CalcItemHeight() and SetItemHeight() (non-MFC: LB_SETITEMHEIGHT) for each item.

Example:

void CCustomListBox::OnSize(UINT nType, int cx, int cy) 
{
   SetRedraw(FALSE);
 
   // recalc height for all items.
   const int nCount = GetCount();
   for (int i = 0; i < nCount; i++)
   {
      int nHeight = CalcItemHeight(i, cx);
      SetItemHeight(i, nHeight);
   }
 
   SetRedraw(TRUE);
   Invalidate(FALSE);
 
   CListBox::OnSize(nType, cx, cy);
}

Shog⁹
~~------~~
Crazy lady with the shiny shoes, where are you?
Kick your feet and calm the space that makes you hollow

Live, Insomnia And The Hole In The Universe

Re: CListBox WM_MEASUREITEM problems

alex.barylski2-Oct-02 19:59

alex.barylski

2-Oct-02 19:59

Hey Shog I haven't really read your answer fully, but I have full confidence in your answer, so again I give you my thanx!!!

I really appreciate this one...not that I didn't appreciate past help, but this makes a huge difference in my control for user friendliness and I just got sooo Mad | :mad:

trying to figure out what was going on...you've saved me countless hours of grief here.

Thanx again!!! Smile | :)

Cheers!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

how the control goes to my own created procedure

imran_rafique2-Oct-02 13:12

imran_rafique

2-Oct-02 13:12

if i press ctrl+alt+delete then control should go my own created procedure not to operating system services Smile | :)

r00d0034@yahoo.com

Re: how the control goes to my own created procedure

Anders Molin2-Oct-02 13:39

Anders Molin

2-Oct-02 13:39

You cannot do that.

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: how the control goes to my own created procedure

jmkhael2-Oct-02 22:50

jmkhael

2-Oct-02 22:50

But you can, just rewrite the GINA.dll, online MSDN has good samples of that, but be aware that u could lock ur system if u did something wrong
Search for gina on msdn!

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

how to log off and login user

imran_rafique2-Oct-02 12:56

imran_rafique

2-Oct-02 12:56

how to log off and login user from the system remotely(from server to client)
what is procedure . Smile | :)

r00d0034@yahoo.com

Re: how to log off and login user

Nilesh Karkhanis3-Oct-02 3:51

Nilesh Karkhanis

3-Oct-02 3:51

Have a look at impersonate api calls they allow user to login and logoff user remotely.

Hope that would help

- Nilesh

RAS from service

Alexey Yakovlev2-Oct-02 12:54

Alexey Yakovlev

2-Oct-02 12:54

I am trying to establish a RAS-connection from a service with
the following code:

//read entry parameters
BOOL password;
RASDIALPARAMS params;
memset(&params, 0, sizeof(RASDIALPARAMS));
params.dwSize = sizeof(RASDIALPARAMS);
lstrcpyn(params.szEntryName, name, sizeof(params.szEntryName));

m_error = ::RasGetEntryDialParams(NULL,
&params, &password);

LOG(3, "RAS::RasGetEntryDialParams\n"
" name=%s\n"
" phone=%s\n"
" callback=%s\n"
" user=%s\n"
" pass=%s\n"
" domain=%s\n"
" error=%d\n",
params.szEntryName,
params.szPhoneNumber,
params.szCallbackNumber,
params.szUserName,
params.szPassword,
params.szDomain,
m_error);

//try to connect
m_error = ::RasDial(NULL, NULL, &params, 0, NULL, &m_hras);
if (!m_error)
return true; //success

This works just fine if code runs as "normal" executable, but
cannot read dial-up entry parameters from service under
"LocalSystem" account, i.e. LOG prints entry name only.

What security settings am I missing?

Thank you,
Alexey

how to halt mouse and key board

imran_rafique2-Oct-02 12:43

imran_rafique

2-Oct-02 12:43

how to halt mouse and key board
what is procedure Smile | :)

r00d0034@yahoo.com

Re: how to halt mouse and key board

alex.barylski2-Oct-02 13:36

alex.barylski

2-Oct-02 13:36

Read up on system hooks, thats prolly a good place to start!

"An expert is someone who has made all the mistakes in his or her field" - Niels Bohr

Re: how to halt mouse and key board

imran_rafique2-Oct-02 17:02

imran_rafique

2-Oct-02 17:02

can u provide the related link about that?

r00d0034@yahoo.com

Re: how to halt mouse and key board

C^hris L^osinger2-Oct-02 19:16

C^hris L^osinger

2-Oct-02 19:16

start here:

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=system+hooks+windows+keyboard

-c

bit, n:
A unit of measure applied to color. Twenty-four-bit color refers to expensive $3 color as opposed to the cheaper 25 cent, or two-bit, color that use to be available a few years ago.

War Pigs

Multithreading :: MFC

valikac2-Oct-02 12:18

valikac

2-Oct-02 12:18

Hi.

In an MFC project, is better to implement multithreadingusing AfxBeginThread() or a normal create-thread function such as _beginthread() and CreateThread()? I remember Jeff Prosise recommending AfxBeginThread() for MFC. I would like to get more inputs.

Thanks,
Kuphryn

Re: Multithreading :: MFC

Michael Dunn2-Oct-02 19:23

Michael Dunn

2-Oct-02 19:23

To paraphrase the docs, any thread that uses MFC must be created by MFC. So if the new thread uses any MFC features (or access MFC objects), you'd better use AfxBeginThread().

--Mike--
Just released - 1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click!
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

Re: Multithreading :: MFC

valikac2-Oct-02 19:57

valikac

2-Oct-02 19:57

Okay. Thanks.

Kuphryn

Detecting disk letter changes on 2K/XP

Mukkie2-Oct-02 11:51

Mukkie

2-Oct-02 11:51

Hi!

How to detect disk letter change on 2K/XP. Functionality to change drive letters and manage volume mounting points is available from mmc (compmgmt.msc)

Thanks

DC absolute position

Goa2-Oct-02 11:27

Goa

2-Oct-02 11:27

how can i get absolute position of my DC on the screen?

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