C / C++ / MFC

10-Jul-03 23:17

Hi,
I have a custom control in wich I want to display some vertical text. I want also, before drawing it, know the size this text will take.
For horizotal text, it's simple I can use CDC::GetTextExtent(const CString& str) and CDC::ExtTextOut(...) methods.

Any idea?
Thanks!

Cedric Moonen10-Jul-03 23:27

10-Jul-03 23:27

Ok, I found something Smile | :)

.

This will look like:

CFont NewFont;
CFont* pOldFont;
NewFont.CreatePointFont(nFontSize,lpFontName,pDC);

if (!bIsHorizontal)
{
    LOGFONT* pLogFont;
    NewFont.GetLogFont(pLogFont);
    pLogFont->lfOrientation = 900;

    CFont VertFont;
    VertFont.CreateFontIndirect(pLogFont);
    pOldFont = pDC->SelectObject(&VertFont);
}
else
    pOldFont = pDC->SelectObject(&NewFont);

(Not sure about the orientation value but I will check it).

Sorry to have disturbed you Poke tongue | ;-P

Ryan Binns10-Jul-03 23:47

10-Jul-03 23:47

You can use GetTextExtent() for vertical text as well - just swap the height and width around Wink | ;)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Cedric Moonen10-Jul-03 23:52

10-Jul-03 23:52

Not sure 'bout that. I don't think that the width and the heigth are equal for each characters (for example, 'i' is not a perfect square).
In fact I develop for PocketPC so, if I can earn a pixel, I will do it Wink | ;)

!
Nowaday thanks Smile | :)

Ryan Binns11-Jul-03 0:00

11-Jul-03 0:00

cedric moonen wrote:
I don't think that the width and the heigth are equal for each characters (for example, 'i' is not a perfect square).

That's right, but it doesn't matter. If you get the size of the entire string (say 100 pixels wide and 20 pixels high), and rotate it 90 degrees, the text will now be 20 pixels wide and 100 pixels high.

Or do you mean that you rotate the string, but not the characters? eg.

A
B
C

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Cedric Moonen11-Jul-03 1:03

11-Jul-03 1:03

Mmmh, that's rigth ! First I wanted just rotate the string and not the characters but I think it will be ugly.
So now I can just invert the width and the height of the rectangle Smile | :)

!
Thanks

Ryan Binns11-Jul-03 1:08

11-Jul-03 1:08

You're welcome Smile | :)

BTW, to rotate the text and the characters the same amount, set the lfOrientation and lfEscapement members of the LOGFONT structure to be the same Smile | :)

. In fact, this is the only thing that works under Win9x/ME, which don't support letters rotated differently to the entire string (if that makes sense... Unsure | :~

)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

VC++ -VB access

RaajaOfSelf10-Jul-03 23:08

RaajaOfSelf

10-Jul-03 23:08

I am intrested to know ,what are the issues will arise if i write a OCX /DLL in VB and use it in vc++ .If there is any article on that ,please do mention

Re: VC++ -VB access

Ryan Binns10-Jul-03 23:49

10-Jul-03 23:49

No problems. Just make sure you get the parameter types correct in VC++.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

VC++ -VB access

RaajaOfSelf10-Jul-03 23:08

RaajaOfSelf

10-Jul-03 23:08

I am intreste dto knwo ,what are teh issues will arise if i write a OCX /DLL in VB and use it in vc++ .If there is any articleon that ,please do mention

Progress bar

Member 42425910-Jul-03 22:58

Member 424259

10-Jul-03 22:58

Hello friends,
I am working with wizard sheet.
on one of the page i have a progressbar.
the progressbar works fine on all O.S.
but if i run this application on winXP
the progressbar move (progresses) till
half. The application is working fine i mean the
work which it should be doing but the progressbar
doesnt move ahead.
can anybody helpme out of this problem...

Thanx in advance
TAKE CARE

Re: Progress bar

David Crow11-Jul-03 2:59

David Crow

11-Jul-03 2:59

siid wrote:
The application is working fine i mean the
work which it should be doing but the progressbar
doesnt move ahead.

Are you saying that the work continues as normal, but that the progress bar just stops?

casting problem

Jerome Conus10-Jul-03 22:57

Jerome Conus

10-Jul-03 22:57

Hi !

In my app, I'm using a class that I didn't develop (and I have no access to the source code), which implements a linked list where pointers are stored with the type long.

From this list, when I'm extracting a pointer at a specific index, I used to cast it into the needed type, for instance :

Entity* pEntity=(Entity*)MyList->GetPointerAt(3);

But now, I would like to get rid of these old C casts and use the C++ cast. Here is what I did :

Entity* pEntity=static_cast<entity*>(MyList->GetPointerAt(3));

But now, the compiler is rejecting this line, telling that the cast from 'long' to 'Entity*' is not possible.

Anyone could tell me how I should implement this cast with only C++ casts ?

Thank you for your help !
Jerome

Re: casting problem

iceage10-Jul-03 23:09

iceage

10-Jul-03 23:09

see this: http://www.codeguru.com/forum/showthread.php?s=&threadid=253032

Re: casting problem

jhwurmbach10-Jul-03 23:12

jhwurmbach

10-Jul-03 23:12

You need to use

Entity* pEntity = reinterpret_cast < Entitiy* > (MyList->GetPointerAt(3));

because you are casting an number (your long-variable)into something completely different: A pointer to an Entity-Object.
Static_cast can cast between differnt types of numbers, but you need to get something stronger to cast a number into a pointer. And that is reinterpret_cast.

My opinions may have changed, but not the fact that I am right.

callback question

andyg.10110-Jul-03 22:27

andyg.101

10-Jul-03 22:27

Can somebody explain to me what a callback function is ? is it just a recursive function or have I missed the point?
Andy

Re: callback question

Ryan Binns10-Jul-03 22:36

10-Jul-03 22:36

A callback function is one whose pointer you give to an object or function, and it gets called by the other object or function when a certain condition arises.

For example, the SetTimer() Win32 API function can take a pointer to a function that gets called when the timer period elapses. The function that you pass to SetTimer and gets called is the callback function.

A slightly different example is used with the EnumFontFamilies() function. You pass a pointer to a callback function, and the callback function gets called once for every font that matches the criteria specified in the call to EnumFontFamiles(). In this case, the callback function is called as many times as needed before the EnumFontFamilies() function returns, as opposed to SetTimer() above, where the callback function is called sometime in the future.

Hope this explains it more Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: callback question

andyg.10110-Jul-03 23:00

andyg.101

10-Jul-03 23:00

Yes that covers it thanks. Smile | :)

Re: callback question

Ryan Binns10-Jul-03 23:43