Re: how to access C..Doc var. from any class ? - C / C++ / MFC Discussion Boards

Re: how to access C..Doc var. from any class ?

Hydralisk29-Jul-02 16:47

Hydralisk

29-Jul-02 16:47

CTtDoc *pDoc=(CTtDoc *)((CMainFrame *)AfxGetApp()->m_pMainWnd)->GetActiveDocument();

Re: how to access C..Doc var. from any class ?

JennyP29-Jul-02 19:10

JennyP

29-Jul-02 19:10

Hello,

I tried using this in a DialogBar function to point back to the Document function to get some UINT values.

When calling the function from the Document, it works fine.

However, when calling it from the DialogBar using the pDoc pointer, the Document function cannot access any of the Document's members--even the debugger cannot "evaluate" the member variables. Both function and members are public in my case.

So it appears that this pointer is not a full-feature pointer....? I'm interested both in a solution to get Document function (data) from 'remote' classes such as my DialogBar AND (academically) what is going on in this case--why doesn't it work from a nuts & bolts standpoint.

Thanks! Smile | :)

JennyP

Re: how to access C..Doc var. from any class ?

JennyP29-Jul-02 19:33

JennyP

29-Jul-02 19:33

After trying the first example and it not working (see my previous post), I tried the following and it worked. I guess the first compiles, but the pointer points not to where the actual data is stored but rather an empty data structure? (Just my WAG.) It seems the "GetActiveFrame()" may be important. If someone could explain the technical reasons, I'd appreciate it. Thanks!

CTtDoc *pDoc=(CTtDoc *)((CMainFrame *)AfxGetApp()->m_pMainWnd)->GetActiveFrame()->GetActiveDocument();

JennyP

Re: how to access C..Doc var. from any class ?

Fred D.30-Jul-02 5:01

Fred D.

30-Jul-02 5:01

even by doind so, i've got a descent value of pDoc but the values it holds are all set to 0 ? Confused | :confused:

i keep looking....

Re: how to access C..Doc var. from any class ?

JennyP30-Jul-02 5:54

JennyP

30-Jul-02 5:54

Now that I think of it, my values were zero, but I expected them to be zero. I'll have to set my values to be some non-zero value and see what happens. If they remain zero, then it's likely pointing to a new and separate instance of CDoc that was just created.... hmmm...

JennyP

Re: how to access C..Doc var. from any class ?

JennyP30-Jul-02 17:01

JennyP

30-Jul-02 17:01

I found that I have the exact same problem. I'm going to cludge around it by passing the other class's pointer to CDoc and doing it in reversed. It's worked for me before.

If you find a solution, I'd be VERY interested! Thanks!

JennyP

Re: how to access C..Doc var. from any class ?

JennyP30-Jul-02 18:05

JennyP

30-Jul-02 18:05

Actually, I found that my pDoc (attained as shown in previous messages above) DOES WORK.

I had another problem with my pDoc->Function that returned 0s.

Anyway,..... works for me.... maybe you should double check your document values? I saw the values were good in the debugger and simply was being returned incorrectly from a function.

Good luck.

JennyP

Re: how to access C..Doc var. from any class ?

Fred D.31-Jul-02 3:28

Fred D.

31-Jul-02 3:28

it's alright i found my mistake : a problem of where i declared the pDocument !

so now this part of code works fine, and i get access to the real values, all good.

PgGPS::PgGPS() : CPropertyPage(PgGPS::IDD)<br />
{<br />
	pDocument = NULL;<br />
	pDocument = (CMtsBaseDoc*)((CMainFrame*)AfxGetApp()->m_pMainWnd)->GetActiveFrame()->GetActiveDocument();<br />
	<br />
	//{{AFX_DATA_INIT(PgGPS)<br />
	//}}AFX_DATA_INIT<br />
}

by doing so in the constructor pDocument, accessible anywhere within the class, allows you to access to all the variables and methods in C..Doc. Cool | :cool:

Fred

Re: how to access C..Doc var. from any class ?

Hydralisk30-Jul-02 19:07

Hydralisk

30-Jul-02 19:07

I think your applcation is a base on MDI,so you must invoke GetActiveFrame.and mine is base on SDI,so....

Capture Maximize/Minimize

Tony Fontenot29-Jul-02 9:50

Tony Fontenot

29-Jul-02 9:50

How would I go about capturing the Maximize and Minimize buttons. Basically I have two modeless dialogs, when one is minimized I want to hide the other, and when it gets restored I want to show the other dialog.

Any Suggestions?

Thanks in advance.

***********************
Tony Fontenot
Recreational Solutions
tony@recsolutions.com
***********************

Re: Capture Maximize/Minimize

Joaquín M López Muñoz29-Jul-02 9:58

Joaquín M López Muñoz

29-Jul-02 9:58

Handle WM_SYSCOMMAND.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Alt + F4

Anonymous29-Jul-02 9:46

Anonymous

29-Jul-02 9:46

hey,

does anyone know a way to disable the combination
of 'Alt + F4' on a different window given that i
have it's handle without using it's windowProc.
I have tried to use 'RemoveMenu' api function
to remove the close sysmenu but the 'Alt + F4'
still works.

thanks

Re: Alt + F4

Anonymous29-Jul-02 10:04

Anonymous

29-Jul-02 10:04

hey,

I just wanted to add something to my question:
I also tried to set it's window style to the
exact window style of a form which i've created
in VB with no controlBox, and in that form the
combination 'Alt + F4' did not work. however,
setting the other window to the same window style
did not work.
How can that be?!?!

Re: Alt + F4

Roman Nurik29-Jul-02 18:19

Roman Nurik

29-Jul-02 18:19

try adding an accelerator Alt + VK_F4 and set it to command id 0 or something

- Roman -

Re: Alt + F4

Alexandru Savescu29-Jul-02 20:38

Alexandru Savescu

29-Jul-02 20:38

Alt+F4 will send a WM_CLOSE message to your application. You may consider handling that message.

Best regards,
Alexandru Savescu

Variable Passing again...

NickOne29-Jul-02 9:38

NickOne

29-Jul-02 9:38

Hey guys,

I got a question abotu variable passing again.

In my OnNewDocument function call, I store the filename into a CString called FileName. Then I call an UpdateAllViews.
In my OnUpdate I use this:

CDisplayDIBDoc* pDoc = (CDisplayDIBDoc*)GetDocument();
if (pDoc)
{
m_Dib.Load((LPCTSTR)pDoc->m_Filename);

InvalidateRect( NULL, TRUE );
UpdateWindow();
}

This takes the FileName and passes it in the load function so I can load my DIB.

All this said, I want to pass the same string to my new Child Window so that it's OnPaint will also load and then draw the same Image.

What I need to do is pass FileName from the Doc class to the ChildWindow class. I tried using the above code in the new ChildWindow class, but I get an error.

It says that GetDocument()is an undeclared identifier.

My question is:
How do I pass this string to the appropriate class?

Do I need a getDocument function for the ChildWIndow class? It is a CMDIChildWnd class. I look in Class Wizard and there is no GetDocument for me to "add Function". There is also no OnUpdate. SO should I create my own GetDocment or OnUpdate functions?

Thanks a lot,

Sorry for the ong winded question

NickOne

Re: Variable Passing again...

Joaquín M López Muñoz29-Jul-02 9:49

Joaquín M López Muñoz

29-Jul-02 9:49

Doesn't GetActiveDocument work?

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: Variable Passing again...

NickOne29-Jul-02 10:26

NickOne

29-Jul-02 10:26

I don't suppose I could trouble you to show me an example of how I could use that?

Thanks,

NickOne

Re: Variable Passing again...

NickOne29-Jul-02 10:42

NickOne

29-Jul-02 10:42

Never mind! I was being lazy, but I found good documentation. You were right, like always.

Now I'm rolling again!

Thanks so much!

NickOne

Keeping a dialog on top

Tony Fontenot29-Jul-02 8:39

Tony Fontenot

29-Jul-02 8:39

Boy I feel dumb today. I know I have seen an article on here that tells me how to keep a dialog as the top window, but I can't seem to find it through the search engin or my manual search. If someone could be so kind and point me to a good arctile I would be very grateful.

Here's to bad days.

***********************
Tony Fontenot
Recreational Solutions
tony@recsolutions.com
***********************

Re: Keeping a dialog on top

Tomasz Sowinski29-Jul-02 8:46

Tomasz Sowinski

29-Jul-02 8:46

Check this...

::SetWindowPos(hwndDlg, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);

... or, if you're MFC type, this:

dlg.SetWindowPos(&CWnd::wndTopMost, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);

Tomasz Sowinski -- http://www.shooltz.com

- It's for protection
- Protection from what? Zee Germans?

Re: Keeping a dialog on top

Tony Fontenot29-Jul-02 8:53

Tony Fontenot

29-Jul-02 8:53

you da man!! Cool | :cool:

Thank you much, that did it, now I have to do some positioning and I should be good.

Thanks again.

***********************
Tony Fontenot
Recreational Solutions
tony@recsolutions.com
***********************

Re: Keeping a dialog on top

Jeremy Falcon29-Jul-02 8:48

Jeremy Falcon

29-Jul-02 8:48

::SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE|SWP_NOSIZE);

Jeremy Falcon
Imputek

<nobr>"..." - Paul Watson 07-17

limit to # of characters in richEditCtrl

ns29-Jul-02 10:00

29-Jul-02 10:00

Its looking like the strlen of a char* variable populating a richeditctrl via SetWindowText is 2047 (yes I fine tuned it to exact). Any larger and it wont compile - string too big. I need to have the user enter his stuff directly without having to manipulate it by code (in case strcpy and strcat work - wil try next), so any views on this limit?

Thanks,
ns

Re: limit to # of characters in richEditCtrl

[James Pullicino]30-Jul-02 2:01

[James Pullicino]

30-Jul-02 2:01

Do not use SetWindowText for large strings. There are some Stream/in/out functions which you should learn how to use.

Drinking In The Sun
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