Re: Changing focus to control - C / C++ / MFC Discussion Boards

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Re: Whats the deal with IDispatch? - give us a clue!!!

Gerald Schwab12-Apr-02 10:38

Gerald Schwab

12-Apr-02 10:38

I think what I said earlier would only work if your method looked like this :

// Notice that we are passing IDispatch directly...
Messenger::get_MyContacts(IDispatch);

instead of:

// Notice that we are passing a pointer to IDispatch...
Messenger::get_MyContacts(IDispatch*);

I think your gonna have to do this...

IMessenger *msger = NULL;
IMessengerContact *pContact = NULL;
IMessengerContacts *pContacts = NULL;
IDispatch* id = NULL;
long pCount = 0;
hr = CoCreateInstance( CLSID_Messenger, NULL, CLSCTX_INPROC_SERVER, IID_IMessenger, (LPVOID*) &msger );
hr = msger->get_MyContacts( &id );
hr = id->QueryInterface( IID_Contacts, &pContacts );
pContacts->get_Count( &pCount );
...

Ahhh, the joys of COM.... Wink | ;)

Re: Whats the deal with IDispatch? - give us a clue!!!

12-Apr-02 10:42

Thanks, you are a star!! This is basically what the first guy was trying to tell me, but I was too daft to realise Smile | :)

I feel that I understand COM a lot more now after fiddling around with this stuff for the lsat 9 hours !!!

Thanku!

Formatting Rebar

funbag12-Apr-02 8:36

funbag

12-Apr-02 8:36

I'd like to include the formatting rebar in a dialog box I'm creating. Does anyone have a sample of this? Maybe this might be an idea for an article?

The formatting rebar I'm talking about is featured in many MS editor based programs, such as MS Word, or Frontpage, and includes font selection, point selection, bold italic and underline selection etc.

Many thanx,
funbag
Blush | :O

skydiving....if at first you don't succeed, you're fecked!

Re: Formatting Rebar

Andres Manggini12-Apr-02 9:19

Andres Manggini

12-Apr-02 9:19

If I recall correctly, on the MSDN Help there is an example of an application similar to WordPad, maybe you can look it up there.

Andres Manggini.
Buenos Aires - Argentina.

Property Sheet Wizard Questions

moobob12-Apr-02 8:27

moobob

12-Apr-02 8:27

Couple of questions regarding PropertySheet Wizards:
- Is there a way to remove the upper right corner close button on the wizard pages?
- Is there a way to make one of the pages smaller? My first page in the dialog editor is smaller than the second. When I run the code, both pages are made the same size. I suspect the PropertyPage class sizes all the pages to the size of the largest page. I would like to make my first page the same size that is shown in the dialog editor.

Thanks in advance,
Bob

Changing focus to control

Hans Ruck12-Apr-02 8:12

Hans Ruck

12-Apr-02 8:12

I try to set the focus to a control in a dialog window. I do this by calling
SetFocus to the object associated in the end of InitDialog().
But the result is nop. The focus is owned by other control and it doesn't
seem to be happy to renounce.

What is the solution?

rechi

Re: Changing focus to control

Andres Manggini12-Apr-02 9:17

Andres Manggini

12-Apr-02 9:17

Have you seen this comment at the end of the OnInitDialog() ?

return TRUE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE

Hope this helps.

Andres Manggini.
Buenos Aires - Argentina.

Re: Changing focus to control

Hans Ruck14-Apr-02 21:18

Hans Ruck

14-Apr-02 21:18

Unfortunately, it doesn't.

rechi

shared folders

12-Apr-02 8:11

is it possible to create a new shared folder using VC++/MFC..so that files from this folder can be accessed from another machine?

Smile | :)

anyhelp will be appreciated!

Re: shared folders

Mike Nordell13-Apr-02 20:51

Mike Nordell

13-Apr-02 20:51

NetShareAdd

Full row highlight

kirankm12-Apr-02 7:27

kirankm

12-Apr-02 7:27

Hi,
I saw an article posted on full row highlighting in the ListCtrl section.I wanted to know if I could do the same thing if the ListCtrl has only one column in each row.Currently the blue highlight rectangle appears only for the length of the text (in small icon report view mode).Is it possible to extend the highlight to the entire width of the screen?I am making use of Embedded VC and basic Common Controls supported by WinCE(ie no MFC).
Thanks in advance,
V

Re: Full row highlight

James R. Twine12-Apr-02 7:49

James R. Twine

12-Apr-02 7:49

IIRC, I had the same problem once, and I used Custom Draw to fix it by getting the item's rect, extending it to the end (right side) of the control, and then filling in that rect with the appropriate color at the appropriate painting stage.

However, I do not know if WinCE supports Custom Draw... Hmmm | :|

Peace!

-=- James.

How to stop a CView from resizing?

moredip12-Apr-02 7:07

moredip

12-Apr-02 7:07

Hello everyone,

I want to stop a CView-derived window from resizing below a certain size. I've tried overriding OnWindowPositionChanging() as follows:

void CPlaybackView::OnWindowPosChanging( WINDOWPOS *lpwndpos )
{
	UINT cx, cy;

	cx = lpwndpos->cx;
	cy = lpwndpos->cy;

	m_rcFrameHeader.SetRect(
		CXMARGIN, 
		cy - CYMARGIN - CYFH, 
		cx - CXMARGIN, 
		cy - CYMARGIN );

	m_rcScreen.SetRect(
		CXMARGIN, 
		CYMARGIN, 
		cx - CXMARGIN, 
		m_rcFrameHeader.top - CYMARGIN );

	if( m_rcScreen.Height() < 0 )
	{
		m_rcScreen.bottom = m_rcScreen.top;
		lpwndpos->flags |= SWP_NOSIZE;
	}

	CView::OnWindowPosChanging( lpwndpos );
}

but the window is still resizing. The contents isn't redrawn, coz my OnSize isn't called, but the window still resizes.

Do I have to override WM_GETMINMAXINFO? From my reading of MSDN this won't even be called coz I overrode WM_WINDOWPOSITIONCHANGING.

Anyone got any ideas?

TIA,

Pete

Re: How to stop a CView from resizing?

Tim Deveaux12-Apr-02 7:12

Tim Deveaux

12-Apr-02 7:12

Try _directly_ changing the values of the lpwndpos cx and cy values to the minimum (or maximum) sizes when they arrive out of bounds.

Re: How to stop a CView from resizing?

moredip12-Apr-02 8:10

moredip

12-Apr-02 8:10

No joy

Make no difference.

Any other suggestions anyone?

Re: How to stop a CView from resizing?

Paul M Watt12-Apr-02 8:15

Paul M Watt

12-Apr-02 8:15

WM_GETMINMAXINFO is the message that you want to override. This message is called right before the WM_ENTERSIZEMOVE message is called, indicating that the program is entering the modal size move loop. Window caches the min max information, and will not let the mouse track to a size any larger or smaller than the dimensions that you specified. This is how you can make it so that the user does not drag the window really tiny, then when they let go it snaps back to a larger size.

WM_GETMINMAXINFO is also called right after WM_WINDOWPOSCHANGING in order to verify that the min and max requirements are met for the window based on what the application sets inside of the handler for WM_WINDOWPOSCHANGING.

I think that your best bet is to handle WM_GETMINMAXINFO for min and max requirements, and anything that needs to be dealt with in between that range should be dealt with in WM_WINDOWPOSCHANGED.

Good Luck

Checkout my Guide to Win32 Paint for Intermediates

Re: How to stop a CView from resizing?

moredip12-Apr-02 9:01

moredip

12-Apr-02 9:01

Well I tried what you suggested, but Windows doesn't seem to want to call my OnGetMinMaxInfo() Frown | :(

I've got a CVideoView, which is derived from CPlaybackView, which is derived from - you guessed it - CView.

here's what I've got in CVideoView:

//CVideoview.h
...
	afx_msg void OnSize(UINT nType, int cx, int cy);
	//}}AFX_MSG
	afx_msg void OnGetMinMaxInfo( MINMAXINFO FAR* lpMMI );
	//afx_msg void OnWindowPosChanging( WINDOWPOS* lpwndpos );
...
DECLARE_MESSAGE_MAP()

//CVideoview.cpp
...
	ON_WM_SIZE()
	//}}AFX_MSG_MAP
	ON_WM_GETMINMAXINFO()
	//ON_WM_WINDOWPOSCHANGING()
...
ENDMESSAGEMAP()
...
...
void CVideoView::OnGetMinMaxInfo( MINMAXINFO FAR* lpMMI )
{
	TRACE( "In CVideoView::OnGetMinMaxInfo()" );
	lpMMI->ptMinTrackSize.x = CXVHC+CXMARGIN*2;
	lpMMI->ptMinTrackSize.y = CYVHC+CXMARGIN*3;
}

That TRACE() never prints Frown | :(

As you might have noticed, I commented out my overridden WM_WINDOWPOSCHANGING, cos I thought that might be why OnGetMinMaxInfo() wasn't being called. But it makes no difference.

I'm wondering what brain-dead mistake I've made Wink | ;)

Re: How to stop a CView from resizing?

Matt Gullett12-Apr-02 9:14

Matt Gullett

12-Apr-02 9:14

Try placing the code in your frame class instead of your view class.

Re: How to stop a CView from resizing?

moredip12-Apr-02 9:36

moredip

12-Apr-02 9:36

Great!

That's fixed it. It's working just right now.

Thanks a lot for all your help guys, today was an enjoyable day in school Big Grin | :-D

Pete

Re: How to stop a CView from resizing?

Paul M Watt12-Apr-02 9:43

Paul M Watt

12-Apr-02 9:43

I am sorry about misguiding you to use the view class, my mind was on one of the earlier questions that related to painting through the view class.

I am glad that you solved your problem though.

kilowatt

Checkout my Guide to Win32 Paint for Intermediates

Re: How to stop a CView from resizing?

moredip12-Apr-02 10:03

moredip

12-Apr-02 10:03

No problem, you set me on the right track, which was more important. Plus I learned some more about how windows deals with resizing, painting etc.

I appreciate it Smile | :)

process crash on dual processor Winnt4 server

Jim Crafton12-Apr-02 6:47

Jim Crafton

12-Apr-02 6:47

OK I have a program (console app) that gets connected to via sockets from another machine and then it just gets sent data repeatedly (financial data feeds). The program has to run 24/7, but on the multi processor box (Winnt4 sp5 dual Intel) it always crashes. The longest I have gotten it to run so far is about 12 hours. When the program runs on Winnt4 Server with a single processor it seems to work better (at least no crashes). Ditto with Windows 2K Worstation.
Are there special libs you need to link with or provide when running on a multi processor box ? I have never done anything like this so forgive what may be a stupid question Smile | :)

The program is a multi-threaded program, running in release mode

Re: process crash on dual processor Winnt4 server

Tim Deveaux12-Apr-02 7:03

Tim Deveaux

12-Apr-02 7:03

Quick fix - use the /ONECPU switch in the boot.ini file! Smile | :)

But seriously folks...

The conventional wisdom is that you haven't tested your multithreaded app until you've tested it on a multi-processor machine.

The HAL and ntoskrnl _are_ different for multiple cpu boxes, but nothing else AFAIK.

Sounds like a fun one. (Feel free to vent at me for that Smile | :)

)

Re: process crash on dual processor Winnt4 server

Jim Crafton12-Apr-02 7:17

Jim Crafton

12-Apr-02 7:17

Tim Deveaux wrote:
Feel free to vent at me for that

Nah! Smile | :)

I kind of figured this would be the case...sigh...
I wish I knew where to look though, maybe we'll just say that our software only runs on single processor machines Smile | :)

, yeah that's the ticket, and you can only run our program, yeah, and then ....

Grrr...back to pulling out my hair

Re: process crash on dual processor Winnt4 server

Tim Deveaux12-Apr-02 7:21

Tim Deveaux

12-Apr-02 7:21

I _think_ the main area to look at is data access.

On a single CPU, threads are switched in a 'more' serialized fashion - while one might be preempted before finishing what its tweaking, it doesn't need to worry about some other identical code running concurrently on another processor - so I guess I'd look at shared data sections etc.

But, yes, pulling hair is good. Assuming you have some to spare. Not all of us do...

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