C / C++ / MFC

Jonas Larsson2-Jan-02 0:36

Jonas Larsson

2-Jan-02 0:36

Christian Graus wrote:
Thanks, but this did not work. Right now I am doing this in OnNotify:

Ok. I remeber that I had alot of trouble catching the HDN_BEGINTRACK, not to mention the HDN_TRACK (AFAIR I never got it). I know I got the above code to work and Ive glanced through the rest of the code to see if I did anything special somewhere else, but I cant find anything suspicious. Also, that project was for WinCE, but the page that explained how to catch the header notification was for the desktop so I assumed it would work there too. I wish I still had that link, but it was like 6 months ago so it probably went in the trashbin some time ago. Ill do a bit of research after work today and post here if I find anything usefull.

Christian Graus wrote:
and in the end I've concluded that CListCtrl is rubbish.

So true. Smile | :)

Jonas Larsson4-Jan-02 4:26

Jonas Larsson

4-Jan-02 4:26

I did some testing yesterday. I create a subclassed CListCtrl in a childview and the only extra stuff I have is this in OnNotify (see below). It keeps the total column width to 240 the whole time and doesnt flicker at all (as opposed to the CE version of CListCtrl, which decides to draw the bottom scrollbar each time before I get a chance to resize the columns)

The only diffrence with this and the earlier version is that I look for HDN_xxxA and HDN_xxxW instead of just HDN_xxx.

Let me know if you still cant get it to work.

BOOL CNumbersListCtrl::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT* pResult) 
{
    HD_NOTIFY *phdn = (HD_NOTIFY *)lParam; 
    switch(phdn->hdr.code)
    { 		
        case HDN_BEGINTRACKA:
        case HDN_BEGINTRACKW:
        {
            // Trap the HDN_BEGINTRACK message
            TRACE(_T("CNumbersListCtrl::OnNotify -- HDN_BEGINTRACK Trapped\n"));
            SetRedraw(false);
            // *pResult = 1;  // Set to 1 and return TRUE to prevent tracking 
            return(FALSE);  // return FALSE to allow tracking of the divider 
            break; 		
        }
        case HDN_ENDTRACKA:
        case HDN_ENDTRACKW:
        {
            int windowsize = 225;   
            TRACE(_T("CNumbersListCtrl::OnNotify -- HDN_ENDTRACK Trapped\n"));

            SCROLLINFO si; // check if scrollbar is visible
            if (GetScrollInfo(SB_VERT, &si))
            {
                if ((int) si.nPage <= (si.nMax-si.nMin))
                    windowsize = 225;
                else
                    windowsize = 240;
            }
            else
                windowsize = 240;
			
            if (phdn->iItem == 0)
	    {
                int left = phdn->pitem->cxy;
                TRACE(_T("CNumbersListCtrl::OnNotify -- Resize right to fit\n"));
                SetColumnWidth(1, windowsize - left);
            }
            else if (phdn->iItem == 1)
            {
                int right = phdn->pitem->cxy;
                TRACE(_T("CNumbersListCtrl::OnNotify -- Resize left to fit\n"));
                SetColumnWidth(0, windowsize - right);
            }	
            SetRedraw(true);
            Invalidate();
            break;
        }
    }	 	
    return CListCtrl::OnNotify(wParam, lParam, pResult); 

}

Christian Graus4-Jan-02 10:36

Christian Graus

4-Jan-02 10:36

Thanks - I had tried this but it just bombed out when I handled these messages. I'll have a look at this code to see what I was doing wrong.

I was actually trying to catch TRACKA and TRACKW though, I'm starting to think these are never sent.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Fazlul Kabir4-Jan-02 5:23

4-Jan-02 5:23

You're right, it doesn't work.

The way I get tracking notifications is by subclassing the header control of the list control in a user defined control and then adding handlers in that sub-classed control.

BEGIN_MESSAGE_MAP(CMyHeaderCtrl, CHeaderCtrl)
	//{{AFX_MSG_MAP(CMyHeaderCtrl)
	ON_NOTIFY_REFLECT(HDN_BEGINTRACKA, OnHdnBegintrack)
	ON_NOTIFY_REFLECT(HDN_BEGINTRACKW, OnHdnBegintrack)
	ON_NOTIFY_REFLECT(HDN_ENDTRACKA, OnHdnEndtrack)
	ON_NOTIFY_REFLECT(HDN_ENDTRACKW, OnHdnEndtrack)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyHeaderCtrl message handlers
void CMyHeaderCtrl::OnHdnBegintrack(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMHEADER phdr = reinterpret_cast<LPNMHEADER>(pNMHDR);
	// TODO: Add your control notification handler code here
	*pResult = 0;
}


void CMyHeaderCtrl::OnHdnEndtrack(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMHEADER phdr = reinterpret_cast<LPNMHEADER>(pNMHDR);
	// TODO: Add your control notification handler code here
	*pResult = 0;
}

As you can see CMyHeaderCtrl is derived from CHeaderCtrl and is recieving all notification messages related to tracking.

I guess I don't need to explain how to subclass the header control to you. Here is what I used..

CDlg::OnInitDialog()
{       ...
        m_MyListCtrl.InsertColumn(0, "First");
	m_MyListCtrl.InsertColumn(1, "Second");
	CHeaderCtrl* pHeaderCtrl = m_MyListCtrl.GetHeaderCtrl();
        ASSERT_VALID(pHeaderCtrl);
        if(pHeaderCtrl && pHeaderCtrl->GetSafeHwnd())
	     VERIFY(m_MyHeaderCtrl.SubclassWindow(pHeaderCtrl->m_hWnd));
        ...
}

Hope this helps.

Regards.

// Fazlul

Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com

Fazlul Kabir4-Jan-02 5:34

4-Jan-02 5:34

I just noticed the angle brackets were eaten up by CP script.

void CMyHeaderCtrl::OnHdnBegintrack(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMHEADER phdr = reinterpret_cast< LPNMHEADER >(pNMHDR);
	// TODO: Add your control notification handler code here
	*pResult = 0;
}


void CMyHeaderCtrl::OnHdnEndtrack(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMHEADER phdr = reinterpret_cast < LPNMHEADER > (pNMHDR);
	// TODO: Add your control notification handler code here
	*pResult = 0;
}

// Fazlul

Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com

Christian Graus4-Jan-02 10:34

Christian Graus

4-Jan-02 10:34

Thanks - I've done this, but it doesn't seem to send any message during a tracking operation ( tried TRACKA and TRACKW ), only before and after.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Fazlul Kabir4-Jan-02 10:48

4-Jan-02 10:48

Well, it actually worked on my system. Let me zip the test project and send that to you.

// Fazlul

Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com

Christian Graus4-Jan-02 11:12

Christian Graus

4-Jan-02 11:12

Thanks for the email, but I'm afraid I've not made myself clear. I get BEINGTRACK and ENDTRACK variants, but I can't get a message *during* the tracking operation.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Fazlul Kabir4-Jan-02 12:45

AaaAAaAARRrRRgGgHHH!!!! KERNEL32.DLL ERROR!!

4-Jan-02 12:45

I see what your're getting at. Perhaps I got confused with BEGIN and END track messages I saw in several replies.

I did some quick test using message trapping option of Spy++, and it seems that HDN_TRACK is not caught. However I saw HDN_ITEMCHANGINGW notification as I changed the sizes of header items. Thus I guess you can use that as a workaround. Here is the quick code I wrote:

BEGIN_MESSAGE_MAP(CMyHeaderCtrl, CHeaderCtrl)
	//{{AFX_MSG_MAP(CMyHeaderCtrl)
	ON_NOTIFY_REFLECT(HDN_BEGINTRACKA, OnHdnBegintrack)
	ON_NOTIFY_REFLECT(HDN_BEGINTRACKW, OnHdnBegintrack)
	ON_NOTIFY_REFLECT(HDN_ENDTRACKA, OnHdnEndtrack)
	ON_NOTIFY_REFLECT(HDN_ENDTRACKW, OnHdnEndtrack)
	ON_NOTIFY_REFLECT(HDN_ITEMCHANGINGW, OnHdnItemChanging)
	ON_NOTIFY_REFLECT(HDN_ITEMCHANGINGA, OnHdnItemChanging)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


void CMyHeaderCtrl::OnHdnItemChanging(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMHEADER phdr = reinterpret_cast<LPNMHEADER>(pNMHDR);
	// TODO: Add your control notification handler code here
	*pResult = 0;
}

Let me know if it helps.

// Fazlul

Get RadVC today! Play RAD in VC++
http://www.capitolsoft.com

Rickard Andersson²⁰30-Dec-01 12:08

Rickard Andersson²⁰

30-Dec-01 12:08

I have keyboard hook installed in my app, when my parent window is visible it works just fine to press the specific key that do something, but when I press the Hide button in my parent window to hide the parent window and then try to press the same key it KERNEL32.DLL crash!
I have two keys that are "hooked"... one of them works but not the other. That one that works is to sjow the parent window... hm.. confusing isn't it?
Kernel32 isn't that the file that has to do with the user inputs?
so, is it my CALLBACK for the keyboard hook?

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

no focus

Rickard Andersson²⁰30-Dec-01 12:13

Rickard Andersson²⁰

30-Dec-01 12:13

I've found something interesting!
When the app is visible and has FOCUS it works fine with both keys, but when it's no FOCUS.. it crashes!!

hmmm

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

Re: AaaAAaAARRrRRgGgHHH!!!! KERNEL32.DLL ERROR!!

squizz31-Dec-01 4:37

squizz

31-Dec-01 4:37

where is your callback declared ?
I assume that it is located in your program.
to make a global hook, the callback must be placed in a dll.

Re: AaaAAaAARRrRRgGgHHH!!!! KERNEL32.DLL ERROR!!

Rickard Andersson²⁰31-Dec-01 5:03

Rickard Andersson²⁰

31-Dec-01 5:03

You got it!
I've just tried it and now it works!!

THANKS!

------------------------------
©0d3 ©®4©k3® - That's me! Smile | :)

------------------------------

Optimizing memory usage

IGx8930-Dec-01 11:53

IGx89

30-Dec-01 11:53

I've developed a little systray app using the SystemTray and Wininet wrappers here, but it's memory usage appears to be way more than it should. By using NT4's Task Manager, it's using 3444k, and other programs (like Apache, an FTP client, and Cacheman) use way less (<1mb!). The only program that comes close in memory usage is my web browser!

Any ideas on how to optimize its memory usage? I applied a bunch of exe size optimizations from the tips section, and got my size down to 26.5k, and now I want to un-bloat its memory usage.

Re: Optimizing memory usage

Konstantin Vasserman30-Dec-01 15:44

Konstantin Vasserman

30-Dec-01 15:44

Check this article out: "How Big Is My Program" by Joseph M. Newcomer

Re: Optimizing memory usage

IGx8930-Dec-01 15:58

IGx89

30-Dec-01 15:58

Ok, so size doesn't matter; I still want to know why, out those 20+ processes, mine is by far the biggest (not counting the web browser)!

Re: Optimizing memory usage

Konstantin Vasserman30-Dec-01 16:15

Konstantin Vasserman

30-Dec-01 16:15

The size that you see in Task Manager is the size of all the DLLs that are mapped in your address space. You've said that it is a SysTray app, that maps SHELL32.DLL into your space - that is 2.5MB right there. You use WININET.DLL that is 500K more. If you use MFC that is another 1MB. KERNEL32.DLL 700+K, NTDLL.DLL 500K. Look at Dependency Walker and see all the DLLs that are being used by your program. All those other programs you are talking about obviously do not use that many DLLs for one reason or the other.

how'd they do that?

hforbess30-Dec-01 11:28

hforbess

30-Dec-01 11:28

This is beginner question Im sure. How do people alter already compiled programs like Yahoo messenger and Icq?

Just really curious. Is it the dll's? And if so, how does one find out about these dll's?

thanks Confused | :confused:

harry

Re: how'd they do that?

Michael P Butler31-Dec-01 1:59

Michael P Butler

31-Dec-01 1:59

Alter the program in what way? Some applications provide support for plugins that you can write to modify and add functionality. Other applications provide an SDK for you to make changes to.

Michael Smile | :)

for example

hforbess31-Dec-01 13:53

hforbess

31-Dec-01 13:53

you cant send more than 1 message in 3 seconds or something like that but I have recieved 100's in a matter of seconds. I dont want to do this, I just want to know how.. It drives me crazy Eek! | :eek:

harry

Syntax colouring

Jon Newman30-Dec-01 8:42

Jon Newman

30-Dec-01 8:42

Is there a simple way (preferably in the form of a tutorial or sample) to use the RichEdit view (MFC) to colour syntax dynamically. Say the language the user would type into the program was HTML and i wanted things like :
<HTML>, <HEAD>, <BODY> and so on in blue. Then scripts in red etc...
the syntax would need to be updated so that if i entered a new <SCRIPT> tag as soon as i typed the ending '>' it would turn red. Is there a way of using an array so that i place all the blue words in one array and all red ones in another.
Also is there a way of making text that is between two sets of quotation marks in one colour etc...

Please advise me on this i'm still a bit of a beginner to C++ Smile | :)

Thanx

.NET or not .NET? MFC is the question......
(P.S. .NET Server is the biz, when u poor folks get it next year u'll realise Wink | ;)

)

Shog⁹30-Dec-01 8:46

Shog⁹

30-Dec-01 8:46

See http://www.scintilla.org/.
Should do all you want and more.

i ain't happy, i'm feeling glad; i got sunshine in a bag; i'm useless, but not for long; the future is coming on...

gorillaz, clint eastwood

Jon Newman30-Dec-01 8:53

Jon Newman

30-Dec-01 8:53

Thanks that looks like it could work.
If any one else can find a better way i'm open for more suggestions!

.NET or not .NET? MFC is the question......

C^hris L^osinger30-Dec-01 8:57

C^hris L^osinger

30-Dec-01 8:57

there are a couple of syntax-coloring editors on this site...

-c

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