C / C++ / MFC

29-Sep-09 23:45

A bit dated (as C++! Roll eyes | :rolleyes:

) list here [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: BEST BOOK IN C++

theCPkid30-Sep-09 0:06

theCPkid

30-Sep-09 0:06

In my humble opinion, the list provided by you will always be incomplete without Programming-Principles-Practice-Using-C++[^]

or
The complete reference C++

both are very good books for beginners.

Re: BEST BOOK IN C++

CPallini30-Sep-09 7:17

Common pointer in whole proyect

30-Sep-09 7:17

You may also suggest Chris to update is article with your titles.
Smile | :)

johnjitu29-Sep-09 23:31

johnjitu

29-Sep-09 23:31

Hello

everybody

First of all i would like to give thanks to everybody because always i got help from here .

Is existing any type of common pointer in c++ .If yes please tell me how it works and where we
have to create and define.What are the advantages of these type of pointer .

CPallini29-Sep-09 23:42

29-Sep-09 23:42

What is a 'common pointer'?
Are you talking about a global variable?
Smile | :)

Cedric Moonen29-Sep-09 23:45

Cedric Moonen

29-Sep-09 23:45

johnjitu wrote:
Is existing any type of common pointer in c++ .

What do you mean exactly by "common pointer" ? Confused | :confused:

Are you talking about an untyped pointer (void*) ?

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

johnjitu30-Sep-09 0:10

johnjitu

30-Sep-09 0:10

Yes really guy i am confused ,but yes its like gobal pointer and any class can use it ,
like i have class called C_InterfazRadio and it does not has any pointer directly assigned to it and
but if i want to use its member funcion in other class whose didnot drived from it ,i will need a pointer to call its member function.

C_InterfazRadio *pIfzRadio = (C_InterfazRadio *) puntGen.pIfzRadio;

POINTEROS_GENERALES puntGen defined in other file.

POINTEROS_GENERALES is defined as typestruct in other file .

I hope i could explain my problem .

CPallini30-Sep-09 2:05

30-Sep-09 2:05

What do you want to do exactly (i.e. can you be more precise with your example)?
And: why do you want to do it?
Smile | :)

Rajesh R Subramanian30-Sep-09 2:26

30-Sep-09 2:26

You mean something like a global variable, that would in turn be available for manipulation all over the source files?

*Shudder*

Take a look at your design again. It could be seriously flawed.

Or if you meant something like a macro, then put it in a header file and include it wherever needed.

It is a crappy thing, but it's life -^ Carlo Pallini

Chuck O'Toole30-Sep-09 8:45

30-Sep-09 8:45

There are lots of reasons to have a global variable without being "seriously flawed". See my other reply.

Rajesh R Subramanian30-Sep-09 9:27

30-Sep-09 9:27

Which is why I said it "could" be flawed, instead of it is flawed. And asked him to check the design.

It is a crappy thing, but it's life -^ Carlo Pallini

Chuck O'Toole30-Sep-09 9:35

30-Sep-09 9:35

Well, this poor guy asks about global variables and he gets no helpful replies, just people asking "why" he wants to do it or questioning the "design". I can't figure out why nobody would just answer the simple question.

Rajesh R Subramanian30-Sep-09 18:59

30-Sep-09 18:59

It's not that I don't want to answer how to use a shared variable. Do you think the answer is difficult?

I suspect that he's trying to do something that can be done in other fairly better. I wanted him to do things the right way. He hasn't answered my question, so I don't know what he's trying to achieve.

People can co-operate a little when someone is willing to expend their time, you know? Smile | :)

It is a crappy thing, but it's life -^ Carlo Pallini

Chuck O'Toole1-Oct-09 3:06

1-Oct-09 3:06

Rajesh R Subramanian wrote:
It's not that I don't want to answer how to use a shared variable. Do you think the answer is difficult?

Don't be insulting, of course I know it's simple. I said it was a simple question in the reply you are responding to plus I already posted the answer.

Rajesh R Subramanian wrote:
I suspect that he's trying to do something that can be done in other fairly better. I wanted him to do things the right way.

Your definition of the right way. His definition of the right way was to use a global / shared variable.

Rajesh R Subramanian wrote:
He hasn't answered my question, so I don't know what he's trying to achieve.

So until he passes some sort of design review conducted by you, you refuse to answer his question. That's an OK answer for somebody asking about designing a database or entire application but for goodness sake, he only wanted to know how to go about declaring and using a global variable, hardly inquisition material.

Rajesh R Subramanian1-Oct-09 6:12

1-Oct-09 6:12

Chuck O'Toole wrote:
Don't be insulting,

I fail to see how was my post insulting.

Chuck O'Toole wrote:
Your definition of the right way. His definition of the right way was to use a global / shared variable.

Bleeding obvious, we all go by what we've learned from our individual experiences, so my right way may be different from his right way. However, there are some practices that are usually considered harmful. I only wanted to know what he's trying to achieve. Are you telling that I cannot ask someone what they're trying to do, when I feel that there is a better way than what they're doing it in?

I'll ask such questions. I've been doing it for years, that's how I do it, even if someone didn't like it.

Chuck O'Toole wrote:
So until he passes some sort of design review conducted by you, you refuse to answer his question.

Excuse me? It isn't a "design review" (do you call this a design review?). Are you just hyping things up for arguments sake? I just wanted to know what he's trying to do. It isn't a global variable, he wanted a variable that he could manipulate from multiple source files, which can usually be avoided. And yes, there are exceptions.

I have already been expending more time than what I'll be willing to do on this argument of this sort. This is serving nobody. So, this is it for me.

It is a crappy thing, but it's life -^ Carlo Pallini

Chuck O'Toole30-Sep-09 8:53

30-Sep-09 8:53

In a common header file (I put mine in StdAfx.h), declare the class and the fact that the pointer (global variable) is external.

class Logger;
extern Logger *TheLogFile;

In the "declaring" module (and any module that uses the global variable), include the class definition

#include "Logger.h"

In the declaring module, declare and initialize the global variable.

Logger *TheLogFile;
...
TheLogFile = new Logger();
TheLogFile->SetFolder("Log\\");
TheLogFile->SetPrefix("UpdateProcess");

Splashscreen

hrishiS29-Sep-09 23:06

hrishiS

29-Sep-09 23:06

Hi to All,

I am sorry if I have posted in wrong forum.
I am trying to learn to make a splashscreen on my MFC application.
I downloaded one sample example,in which there is one .bmp file...If I open it I can see red background. But If I run the demo application, it shows transparency (ie the bacjground is transparent, only the main pictures shows off)...

Now, could anyone please tell me how to create a similar picture like that with .bmp extension...

thanks in advance

-----------------------------
i am on the way to MFC land

«_Superman_»29-Sep-09 23:15

«_Superman_»

29-Sep-09 23:15

Transparent BMPs are created using not one but two BMPs.
One is the actual bitmap and the other is a mask.

These two bitmaps are then ANDed and XORed with the background to get the transparent affect.

Look into the following articles on how it is done.
Creating a Transparent Bitmap[^]
Windows GDI Tutorial 1 - Drawing a bitmap[^]

«_Superman_»
I love work. It gives me something to do between weekends.

theCPkid29-Sep-09 23:15

theCPkid

29-Sep-09 23:15

Your question is not clear but if you can point us to the sample application, then we may be able to explain its behavior
Or
If you want to make a splash screen, just create a new thread and in that thread Create a new window. This thread creation goes at beginning of InitInstance and after your application is initialized, you can kill that splash window thread (at end of InitInstance maybe).

hrishiS29-Sep-09 23:31

hrishiS

29-Sep-09 23:31

i got the sample application from the link below....

http://www.ucancode.net/Visual_C_Control/Splash-screen-of-transparent-bitmap-vc-sample.htm[^]

what i need is just to overwrite the sample bmp with my own bmp with transparent background

-----------------------------
I am a beginner

theCPkid29-Sep-09 23:55

theCPkid

29-Sep-09 23:55

isn't a bmp with transparent background called png image? in the link posted by you, the sample bmp image is treating the pink color as transparent. And also the code is using gdi and not gdiplus. I would suggest you to find some sample code that uses gdiplus for drawing. gdi is outdated Sniff | :^)

and the sample code is not showing the splash screen in separate thread. such a splash screen will only be shown when the initialization is already done.

Of what use is such a splash screen? Sigh | :sigh:

also, if your purpose is to create a splash screen, then the link is of not much use to you. If your purpose is to learn window creation, drawing, setting regions etc then you should find another article. Blush | :O

check this for transparent bitmap concept

for setWindowRgn demo, MFC Transparent CDialog Demo

for gdiplus Starting with GDI+[^]
&
Loading JPG & PNG resources using GDI+[^]

hrishiS30-Sep-09 0:11

hrishiS

30-Sep-09 0:11

thanks a lot for your suggestion. I will do so...

-----------------------------
I am a beginner