C / C++ / MFC

Re: How to update main window from a child dialog??

29-Oct-07 7:51

one way is to use SendMessage to send the updated values

Maximilien29-Oct-07 7:56

Maximilien

29-Oct-07 7:56

or pass a pointer to the main window to the child dialog.

or use the observer/observable pattern.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: How to update main window from a child dialog??

Kiran Satish29-Oct-07 8:44

Kiran Satish

29-Oct-07 8:44

yep got it.... the problem is I am including the header file of my child dialog in my DOC header file and when I try to define a pointer to to a doc object in my child dialog's header file by including the main frame's header file in it, it gave me error of undefined symbol error. Then i tried to include the child dialog's header file in the main frame's cpp file and now its working fine.

thanks for your replies.

PKNT

Dragging windows

mcsherry29-Oct-07 7:32

29-Oct-07 7:32

I've got a full screen dialog application in which i want the user to be able to drag any dialogs which pop up to any position they want on the screen but also to limit them from certain areas of the screen. I've used the following article http://www.codeproject.com/dialog/dragwindows.asp?df=100&forumid=4307&exp=0&select=1749703[^] for the dragging of the dialog (using the OnNcHitTest method). However I can't figure out how to limit where they can drag the dialog. I've though it would be a simple matter of converting the CPoint position for the mouse into screen co-ordinates and checking if it is in a forbidden region and then setting it to be outside of this region.

Any suggestions?

cheers,
Andy

mcsherry29-Oct-07 7:42

29-Oct-07 7:42

ok, found my first mistake, was looking at the x part of the CPoint instead of the y! Blush | :O

I think I've figured the problem, the OnNcHitTest only seems to be called when I've released the left mouse button, so during my drag it doesn't get called. Is there anyway around this?

Mark Salsbery29-Oct-07 8:15

Mark Salsbery

29-Oct-07 8:15

mcsherry wrote:
the OnNcHitTest only seems to be called when I've released the left mouse button, so during my drag it doesn't get called

That's because the system enters a modal message loop for the duration of
the drag.

You may want to take a look at the WM_MOVING message.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

mcsherry29-Oct-07 8:17

29-Oct-07 8:17

Hi thanks for your reply, I've got the solution now, all I had to do was re-read the article I linked to in my orignal post and implement the OnLButtonDown, OnLButtonUp and OnMouseMove methods instead of the other one and do my region check in the OnMouseMove method.

Andy

How to scroll client area in CDialog based window??

Mark Salsbery29-Oct-07 8:25

Mark Salsbery

29-Oct-07 8:25

mcsherry wrote:
OnLButtonDown, OnLButtonUp and OnMouseMove methods instead of the other one and do my region check in the OnMouseMove method

Cool

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

zarraza29-Oct-07 6:27

zarraza

29-Oct-07 6:27

Hi, i have SDI app and CDialog based window, i need to scroll client area if something in window is larger than window itself. I overwrite DoDataExchange() function and add :

SetWindowPos(&wndTop, 0, 0, 800, 500, SWP_SHOWWINDOW);<br />
	if(x==2){<br />
		ShowScrollBar(SB_BOTH);<br />
		SetScrollRange( SB_HORZ, 10, 5000);<br />
		SetScrollRange( SB_VERT, 10, 5000);<br />
        }<br />

But i can't scroll client area.

In previous app i use CFormView derrived window and overwrite OnUpdate() function using this code :

<br />
void CResize1View::OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint) <br />
{<br />
	// TODO: Add your specialized code here and/or call the base class<br />
	if(((m_iLiczbaBut+1)*50)> 400){<br />
		//SetScrollSizes(MM_TEXT, CSize(780,(m_iLiczbaBut+1)*50));<br />
		SetScrollSizes(MM_TEXT, CSize(780, (m_iLiczbaBut+2)*50));<br />
	}<br />
	else{<br />
		SetScrollSizes(MM_TEXT, CSize(780, 500));<br />
	}<br />
	<br />
}

It work corectly in CFormView, but this time i need the same in CDialog but i don't know how to do this. Please help.

Re: How to scroll client area in CDialog based window??

Jeffrey Walton29-Oct-07 10:47

Jeffrey Walton

29-Oct-07 10:47

Hi zarraza,

It is possible (if I recall correctly). I believe I found a sample floating around the web a few years back. The details escape me. Sorry.

Jeff

Getting SNMP data with VC++ - is there a good project?

Rhymhoont29-Oct-07 5:35

Rhymhoont

29-Oct-07 5:35

I seem to be pulling my hair out. Maybe because it's easier than I think and nobody seems to need help with it, but I am trying to get 2 pieces of data out of my bridge using SNMP and display them on a window.

Problem is, I can find no libraries or code projects that seem to address this in any detail. Is it that difficult?

I am an old C programmer than is getting back into prgramming and I like vc++ and am just learning it, so maybe its just me : /

Seems like there could be a function where you send it the MIB octet and get your number back:

unsigned long in GetSNMP(octect *sOctet);

Thanks

-Jay

Re: Getting SNMP data with VC++ - is there a good project?

led mike29-Oct-07 7:31

led mike

29-Oct-07 7:31

Rhymhoont wrote:
I like vc++ and am just learning it, so maybe its just me

So you are developing this for Windows? If so you want to look at the WMI API. There is a SNMP provider available and the API provides the Read/Write operations you seem to be asking about. According to the documentation the provider is not available on 95/98 OS.

http://www.google.com/search?hl=en&q=MSDN+WMI+%22SNMP+Provider%22&btnG=Search[^]

Re: Getting SNMP data with VC++ - is there a good project?

Rhymhoont29-Oct-07 7:52

Rhymhoont

29-Oct-07 7:52

Yes it will be a Win32 app.

I'll take a look at that. Thank you.

So far I am just reading my MRTG log files for the data but, for obvious reasons, want the app itself probe the bridges for data.

I was concidering making a console based app that probes and uploads the data into SQL, and then the Win app reads it and reacts from there. This could be done with two win apps as well, with one running as a service. But in any case, I must be able to get the SNMP data. ; )

Thanks again

Setting the cursor position in CEdit control.

chandu00429-Oct-07 5:09

chandu004

29-Oct-07 5:09

hai all,
i will narrate an example, there by convey my doubt.
in my edit box, the fifth character cannot be an alphabet.
so if the user types 1a34 and D,
i have to delete D from the string in the editchange event and replace the string 1a34 there, such that, the user can type a valid fifth character.
here the problem iam getting is, if i do like this, the cursor is placed at the starting of the string.
now is there any technique, suchthat, i can set the cursor at a required position?
thanks for the opinions.

Mark Salsbery29-Oct-07 5:20

Mark Salsbery

29-Oct-07 5:20

You can use the EM_SETSEL message (CEdit::SetSel()) to position
the caret in the control.

MArk

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

David Crow29-Oct-07 5:50

David Crow

29-Oct-07 5:50

chandu004 wrote:
in my edit box, the fifth character cannot be an alphabet.

It sounds like you need a masked edit control. See here and here.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

led mike29-Oct-07 6:25

led mike

29-Oct-07 6:25

DavidCrow wrote:
It sounds like you need a masked edit control

Or maybe a Caped Crusader Poke tongue | ;-P