C / C++ / MFC

Multiple inheritance in MFC

29-Aug-04 9:03

You have to create a new font and select into the device context before calling Drawtext. CreatePointFont is the easiest (although limited) way to create the font.

dc.Draw3dRect(rc, yellow, yellow);
dc.SetTextColor(black);
 
int points = rc.Height() * 10;
CFont newFont;
newFont.CreatePointFont(points, "Arial", &dc);
CFont *defFont = dc.SelectObject(&newFont);
 
dc.DrawText(str, rc, DT_SINGLELINE | DT_LEFT);
 
dc.SelectObject(defFont); // Restore the font in the dc

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Vaclav29-Aug-04 8:21

Vaclav

29-Aug-04 8:21

I am attempting to add processes into view class in document / view setup by creating multiple inheritance into the view class. ( I need to process each view from common menu.) I followed the sample in MSDN "TN016: Using C++ Multiple Inheritance with MFC" but it will not compile.
I am getting "... : error C2660: 'new' : function does not take 3 parameters" at IMPLEMENT_DYNCREATE(CCCImageView, CScrollView).

The difference between MSDN sample and mine code is the macro IMPLEMENT_DYNACREATE used in the "primary" base class.

MSDN uses IMPLEMENT_DYNAMIC.
My next step is to see how these macros differ.I have not done that yet.

Any suggestion how to debug this?
How can I step thru the macro?
Appreciate any help.
Vaclav

PJ Arends29-Aug-04 9:52

29-Aug-04 9:52

Sounds like the difference between new and DEBUG_NEW. The debug version of new takes three parameters. I am sure it has to do with the standard code:

#ifdef _DEBUG
#define new DEBUG_NEW
etc

that is placed at the top of every cpp file.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Vaclav30-Aug-04 7:07

Vaclav

30-Aug-04 7:07

Thanks, you are correct.
I guess the real question is why did it showed up when I added multiple inheritance to the class. Time to check the macro itself.
Vaclav

PJ Arends30-Aug-04 17:58

30-Aug-04 17:58

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_mfc_cobject.3a3a.operator_new.asp[^]

I have now read TN016. It states you have to overload the operator new and operator delete to remove amibiguities. Seems to me you also have to overload the third (three parameter) version of new.

Good luck;)

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Struct for CListCtrl items/subitems

Vaclav31-Aug-04 9:57

Vaclav

31-Aug-04 9:57

Yes, it does say that, but only if the additional class has same base class.
I am just adding my own abstract class to add new precedures to the view class. I am actually trying to find an easy way to determine an active view so I can modify it. So far I found several ways to do that, but all of them require the actuall view class (cast) to work properly. The "normal" MFC code always returns CView class pointer which is pretty useless in my case.

It seem this note writer missed some important "details".

Thanks for you help.
Vaclav

Thomas Latuske29-Aug-04 8:03

Thomas Latuske

29-Aug-04 8:03

Hi,

I have a CListCtrl derived class. My question is how do I append a structure, with properties like textcolor, font..., to the items/subitems of this control? Should I use a CMap? If I should then tell me please how I should initialize the structure and the CMap a how do I map the struct to the items?

TIA!!!

best regards
Thomas

Re: Struct for CListCtrl items/subitems

toxcct29-Aug-04 9:24

toxcct

29-Aug-04 9:24

search for some articles here in CP... there are many good ones ; i'm sure you can fine what you need.

cheers,

TOXCCT >>> GEII power

Re: Struct for CListCtrl items/subitems

KaЯl29-Aug-04 22:53

KaЯl

29-Aug-04 22:53

If you want to customize the look of your ListCtrl items, you should have a look to this article: Neat Stuff to do in List Controls Using Custom Draw[^]

And if this article doesn't fit your need, have a look to the
List Control articles[^], you should find what you want there.

HTH,

K.

Собой остаться дольше...

Re: Struct for CListCtrl items/subitems

David Crow30-Aug-04 4:44

David Crow

30-Aug-04 4:44

After calling InsertItem(), you'll then need to call SetItemData().

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Ellipsis / variable parameters

0v3rloader29-Aug-04 6:46

0v3rloader

29-Aug-04 6:46

Hello,

I am implementing a function which accepts a number of variable parameters and it has the following form:
char *FormatString(char *pszFrm, ...)

This function performs some (limited) processing which, when concluded, should branch execution to a different function. And this is where the problem lies.

How do I pass this variable number of parameters, as it is (meaning unchanged), to a different function?

Any insights will be greatly appreciated.

Thank you

Re: Ellipsis / variable parameters

PJ Arends29-Aug-04 8:46

Re: Ellipsis / variable parameters

29-Aug-04 8:46

You can pass the va_list you generate to any function that takes it.

char *FormatString(char *pszFrm, ...)
{
  va_list arguments;
  va_start(arguments, pszFrm);
 
  // Call function, passing 'arguments' as one of the variables
 
  va_end(arguments);
 
  return pointer_you_got_somehow;
}

Going by your function name, you are probably wanting to pass the parameters onto sprintf(). You can pass the va_list onto _vsnprintf which does the same thing as sprintf.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclang98/html/_pluslang_functions_with_variable_argument_lists.asp[^]

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

0v3rloader29-Aug-04 9:48

0v3rloader

29-Aug-04 9:48

I've been poking aroung MFC source files and managed to find a reference in ::AfxTrace to the _vsnprintf function...

But thanks a lot anyway!

Cheers,

David Nimrod

Sequentially sorting

Daniel132429-Aug-04 5:46

Daniel1324

29-Aug-04 5:46

I have a CStringArray filled with a bunch of filenames. The filenames are like this... 1.jpg, 2.jpg, 3.jpg, and so on.

I have over a thousand of these. From time to time and for some reason I need to go through and rename all of them. I use CFileFind with FindFile() and FindNextFile()to fill the string array with the filenames. But, they're sorted alphabetically, 1.jpg, 10.jpg, 100.jpg, 2.jpg, 20.jpg, etc.

I need these to be sorted sequentially.

I cant seem to figure out how to do it. All I need is to sort the filenames in the string array sequentially.

Any help?

Thanks,
Daniel

Maximilien29-Aug-04 6:09

Maximilien

29-Aug-04 6:09

string sorting is different than numerical sorting.

if your filenames are only <number>.jpg then, convert the number from string to number and sort according to the numbers.

<hr><a href="http://www.thesorus.qc.ca">Maximilien Lincourt</a>
<b>Your Head A Splode</b> - <i>Strong Bad</i>

Daniel132429-Aug-04 6:26

Daniel1324

29-Aug-04 6:26

I tried that first. Sorting an array of ints isnt any easier.

Know of an easy way to sequentially sort an array of ints?

Maximilien29-Aug-04 6:38

Maximilien

29-Aug-04 6:38

have a look at

QuickSort enabled CArray template class

Maximilien Lincourt
Your Head A Splode - Strong Bad

Daniel132429-Aug-04 6:43

Daniel1324

29-Aug-04 6:43

I figured this out...

	<br />
for (int yy = 0; yy < Size; yy++)<br />
{<br />
   for (int y = 1; y < Size; y++)<br />
   {<br />
      if (c[y] < c[y-1])<br />
      {<br />
         a = c[y-1];<br />
         b = c[y];<br />
         c[y] = a;<br />
         c[y-1] = b;<br />
         a = b = 0;<br />
      }<br />
   }<br />
}<br />

Size = size of int array.

Its ugly, but it works.