A function pointer problem... - C / C++ / MFC Discussion Boards

Owner drawn11-Jan-06 23:47

11-Jan-06 23:47

EnumFontFamiliesEx

The EnumFontFamiliesEx function enumerates all fonts in the system that match the font characteristics specified by the LOGFONT structure. EnumFontFamiliesEx enumerates fonts based on typeface name, character set, or both.

Jesus Loves Rose | [Rose]

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--Owner Drawn Rose | [Rose]

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--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: Getting Font information

<color>Aljechin 12-Jan-06 0:02

<color>Aljechin

12-Jan-06 0:02

Thank you so much. I will try this and see if it helps me.

p.s. Your new signature is better than previous. But it still is harsh on the eyes. Why not light blue color? Just a suggestion

Regards,
Aljechin Alexander

Rose | [Rose]

Re: Getting Font information

Owner drawn12-Jan-06 0:05

Owner drawn

12-Jan-06 0:05

Aljechin wrote:
Your new signature is better than previous. But it still is harsh on the eyes. Why not light blue color? Just a suggestion

You said it you'll have it.

Right now it's in testing phase. Release is pending. He he. Next time it'll be better. Big Grin | :-D

Re: Getting Font information

ThatsAlok12-Jan-06 1:49

ThatsAlok

12-Jan-06 1:49

Owner drawn wrote:
Right now it's in testing phase. Release is pending. He he. Next time it'll be better.

its look better now Smile | :)

, just add a simple Line Jesus Love All

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Getting Font information

Owner drawn12-Jan-06 17:29

Owner drawn

12-Jan-06 17:29

ThatsAlok wrote:
Jesus Love All

Sure he does... Rose | [Rose]

Jesus Loves Rose | [Rose]

<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc;border-bottom:thin solid 1px #6699cc">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Custom menu

Nishad S11-Jan-06 23:40

Nishad S

11-Jan-06 23:40

Hi all,

How could I draw the non-client area in a owner draw menu?

Thank you.

- NS -

Re: Custom menu

Vipin Aravind12-Jan-06 1:40

Vipin Aravind

12-Jan-06 1:40

Can you customise your question ? Smile | :)

Vipin - MVP

A function pointer problem...

Owner drawn11-Jan-06 23:33

Owner drawn

11-Jan-06 23:33

void AFunction(void(*)())
{
   //i am innocent
}
//A class member function
void CAClass::AFunc()
{
    //I am getting an error...(it's given below)
    //is it wrong to do this
    //or can this be done in some other way.
    AFunction(this->AFunc);
}

error C2664: 'func' : cannot convert parameter 1 from 'void (void)' to 'void (__cdecl *)(void)'

Jesus Loves Rose | [Rose]

<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" style="background:#ffaaaa">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: A function pointer problem...

Prakash Nadar11-Jan-06 23:38

Prakash Nadar

11-Jan-06 23:38

AFunc is a member variable, that is why youa re getting that error.

Can you consider making AFunc as static function?
or
check this[^]

-Prakash

Re: A function pointer problem...

Owner drawn11-Jan-06 23:41

Owner drawn

11-Jan-06 23:41

Yeah it works with static, but why not with member functions. Sounds silly but still would like to know. Since it is also a function.

Edit:Thanks a lot prakash.

Jesus Loves Rose | [Rose]

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--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: A function pointer problem...

Prakash Nadar12-Jan-06 0:07

Prakash Nadar

12-Jan-06 0:07

Owner drawn wrote:
Sounds silly but still would like to know. Since it is also a function.

no its not silly, coz it has a good logic behind it, member function has a different "hidden" signature than other functions.

-Prakash

Re: A function pointer problem...

Owner drawn12-Jan-06 0:10

Owner drawn

12-Jan-06 0:10

Mr.Prakash wrote:
no its not silly

Mr.Prakash wrote:
coz it has a good logic behind it, member function has a different "hidden" signature than other functions.

Yea you are right.

[Message Deleted]

Kedar Potdar12-Jan-06 0:30

Kedar Potdar

12-Jan-06 0:30

[Message Deleted]

Re: A function pointer problem...

Prakash Nadar12-Jan-06 0:32

Prakash Nadar

12-Jan-06 0:32

kdar wrote:
The functions are mangled so that they can be uniquely identified and called upon invocation

no you are wrong. mangling is nothing to do with it. mangaling is more relevant for compilers and linkers.

The hidden param is the this param passed to the member functions.

-Prakash

Re: A function pointer problem...

Owner drawn12-Jan-06 0:35

Owner drawn

12-Jan-06 0:35

kdar wrote:
The functions are mangled so that they can be uniquely identified and called upon invocation

~~How. Can you please elaborate. It would be helpful.~~

Edit:Where did he go Confused | :confused:

Jesus Loves Rose | [Rose]

<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" style="background:#aabbcc">
--Owner Drawn Rose | [Rose]

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--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

-- modified at 6:47 Thursday 12th January, 2006

Re: A function pointer problem...

Prakash Nadar12-Jan-06 0:49

Prakash Nadar

12-Jan-06 0:49

Owner drawn wrote:
Edit:Where did he go

he left coz he could not support his theory. Roll eyes | :rolleyes:

-Prakash

Re: A function pointer problem...

toxcct12-Jan-06 0:50

toxcct

12-Jan-06 0:50

Owner drawn wrote:
Edit:Where did he go

urgent need to go to the toilets !? Blush | :O

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Zzzz

Owner drawn12-Jan-06 0:56

Owner drawn

12-Jan-06 0:56

Jesus Loves Rose | [Rose]

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--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: Zzzz

ThatsAlok13-Jan-06 2:27

ThatsAlok

13-Jan-06 2:27

Owner drawn wrote:
ForumVisual C++
Subject:Re: Zzzz
Sender:Owner drawn
Date:6:56 12 Jan '06

don't sleep Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: A function pointer problem...

Cedric Moonen11-Jan-06 23:45

Cedric Moonen

11-Jan-06 23:45

A function member of a class doesn't have the same prototype as a global function: there is the 'this' paramter that is passed as an implicit argument of the function (but it is transparent to the user). To avoid that, you can declare your member function as static. A static function is shared aming all instances of your class and thus doesn't require the implicit 'this' parameter. But of course, within a static function, you can only access static member of your class (because the function does not belong to a specific instance of the class).

Re: A function pointer problem...

Owner drawn11-Jan-06 23:48

Owner drawn

11-Jan-06 23:48

Good. Well said.

Thanks a lot. Big Grin | :-D

Jesus Loves Rose | [Rose]

<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" style="background:#ffaaaa">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: A function pointer problem...

Blake Miller12-Jan-06 6:41

Blake Miller

12-Jan-06 6:41

within a static function, you can only access static member of your class (because the function does not belong to a specific instance of the class).

Unless you also pass a pointer to the object into the functiona as an additional argument, then you can access public members and functions of the class using the pointer to the class.

Marriage slows down your coding, a baby slows it down even more!

Re: A function pointer problem...

BadKarma11-Jan-06 23:57

BadKarma

11-Jan-06 23:57

Hi,

You can alsoo change AFunction to

void AFunction(void(CAClass::*pFunction)())
{
   //i am still innocent
}

this way you can pass a pointer to a member function.
This said you will need to have an object of the type CAClass available to execute the function.

codito ergo sum

Re: A function pointer problem...

Owner drawn11-Jan-06 23:58

Owner drawn

11-Jan-06 23:58

Hmm...Cool Cool | :cool:

Nice one.

BadKarma wrote:
//i am still innocent

Now that's funny...He he Laugh | :laugh:

Jesus Loves Rose | [Rose]

<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" style="background:#ffaaaa">
--Owner Drawn Rose | [Rose]

--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord Rose | [Rose]

Re: A function pointer problem...

C^hris L^osinger12-Jan-06 5:42

C^hris L^osinger

12-Jan-06 5:42

i use this macro:

// call mem fn that takes a single int
#define CALL_MEMBER_FN(object,ptrToMember)  ((object).*(ptrToMember)(int))

// fns have a single int param
typedef  void (CObjType::*fnType)(int); 

...

// holds a pointer to mem fn
fnType m_fnPtr;

...

// call it
CALL_MEMBER_FN(*this, fnPtr)(5);

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-- modified at 11:44 Thursday 12th January, 2006

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