C / C++ / MFC

29-Jun-01 4:08

I overrided the OnCreateClient function for my MDI child window to add a splitter. Everything work just fine except when I type into one of the views I get an illegal error, and I beleive everyone knows what i'm talking about. I was just really hoping someone here could help me with this problem. Also I am compiling with a shared DLL for MFC and service pack 3.

Drake Elsari29-Jun-01 15:53

29-Jun-01 15:53

Someone please help, also I am not using Doc/View architecture.

Ben Burnett29-Jun-01 16:55

Ben Burnett

29-Jun-01 16:55

What kind of error are you getting? be a little more specific.

-Ben

---------
On the topic of code with no error handling -- It's not poor coding, it's "optimistic" Wink | ;)

Drake Elsari30-Jun-01 4:30

30-Jun-01 4:30

Well, when I press on the details it says it's an invalid page fault. Then when I debug it, it says unhandled exception in raIRC.exe(MFC42.dll) 0xC0000005: Access Violation. And in the dissasembly it shows me this line: 5F41A33D mov eax,dword ptr [ecx]

Drake Elsari30-Jun-01 8:08

30-Jun-01 8:08

Please, someone help me with this.

Ben Burnett30-Jun-01 8:29

Ben Burnett

30-Jun-01 8:29

I take it raIRC.exe is you application, the resto of the stuff does not help me much. Check you call stack, is there any of the functions you are overiding in it? If not, try setting a break point just before the code you just entered that is casing the problem, then just step throught till it bombs... do some tracing... make sure all the pointers your using are valid

-Ben

---------
On the topic of code with no error handling -- It's not poor coding, it's "optimistic" Wink | ;)

Drake Elsari30-Jun-01 14:48

30-Jun-01 14:48

I did that, and the code work perfect in Doc/View except the person that told me how to use splitters said it would work without the Doc/View.

International topix

29-Jun-01 4:00

I'm very confused about characters under Windows, I need some answers, if
you know any online books or
articles about international programming please tell me.
First of all what I don't understand is what kind of character do we receive
in wparam along with the WM_CHAR message. I read in a Win 95 book that it is
an ANSI character. Under 2000 it seems like it is not.Then what is the
installed language. What is the difference between setting a certain System
Locale and setting an input language or a keyboard layout. Then what is the
effect of installing some OEM code pages and not install others. What are
the steps that TranslateMessage() function takes to create a WM_CHAR
message from the virtual key, what kind of information in Regional options
does it use on each step and then how exactly does Windows display the
character (for example when typing in Run dialog). Probably I need this
information for both Win 95 (which I understood is not "fully Unicode
compliant" - I need this term explained too) and WinNT or 2000.
Thanks in advance for answer, if you ain't got time for all these, at
least please point me to some serious documentation please. I haven't been
able to figure all things out from MSDN.

Lucian

COleDateTime

Gérald Mercet29-Jun-01 3:57

Gérald Mercet

29-Jun-01 3:57

I need for my automation to catch value in excel, which have date format. I would like to create a dialog box where the user could give a date. So, I create a COleDateTime object : m_date, and I want to compare this value to others which are kept in my excel sheet. How could I do that?

Thanks

gerald

Bret Faller29-Jun-01 6:39

Bret Faller

29-Jun-01 6:39

If you put the dates from your Excel sheet into a COleDateTime object then you can simply just do a m_date == m_excelDate.

Bret Faller
Odyssey Computing, Inc.

1-Jul-01 21:35

OK, but what do you use to do that? Confused | :confused:

Gérald Mercet1-Jul-01 21:38

Gérald Mercet

1-Jul-01 21:38

OK, but what do you use to do that? Confused | :confused:

creating controls on the desktop?!!

Bret Faller2-Jul-01 6:43

Bret Faller

2-Jul-01 6:43

Are you asking how to get the value from Excel through your addin or how do you put the time into a COleDateTime? As far as the automation part goes I don't have a clue, I've only written Outlook Add-ins. But, as far as the COleDateTime question, to copy a time into one you can just pass it in the constructor, assuming its a FILETIME or SYSTEMTIME, like so:
COleDateTime dt(myExcelDateTime);

Bret Faller
Odyssey Computing, Inc.

COleDateTime

Gérald Mercet29-Jun-01 3:57

Gérald Mercet

29-Jun-01 3:57

28-Jun-01 20:03

if i was creating a control in a form i might do this:

ctrl->Create(WS_CHILD, r, this, ID_EXTENDED_EDIT);
ctrl->ShowWindow(1);

Which works fine, however I want my control to be a child of the desktop ie free floating modeless dialog box, so I thought:

ctrl->Create(WS_CHILD, r, this->GetParent(), ID_EXTENDED_EDIT);
ctrl->ShowWindow(1);

would work, but it crashes and I cant see why... any help?

Re: creating controls on the desktop?!!

Drake Elsari29-Jun-01 4:40

29-Jun-01 4:40

I'm willing to bet that Microsoft doesn't want you to be able to do that, maybe they feel it would affect there OS in some way but at any rate I doubt you can do it.

Image Operations

Tran Hoang Chuong28-Jun-01 18:43

28-Jun-01 18:43

Hi all,
In my application, I develop a class CDIB for displaying the image. And now, I'd like to add some method such as: Brightness, Contrast, Colorize. But I don't know. Can you help me?

Thanks in advance for your reading.

Ngo Khai Hoa

Christian Graus28-Jun-01 19:03

Christian Graus

28-Jun-01 19:03

To do this you need direct pixel access, which I assume your class has, i.e. I assume your DIB is a CDIBSection.

Brightness is easy, just add an amount to each of the RGB values for each pixel. Contrast involves trending high values up and low values down. What does colorise mean ?

The pointer to the pixel data is passed into the call that creates the DIBSection. If you want more info on different filters, I'd be happy to dig up something. If you're remotely serious you should buy Windows Graphics Programming by Feng Yuan, which contains heaps of info on filters ( it's where I initially learned about them ). There are also some newsgroups worth reading.

Christian

#include "std_disclaimer.h"

People who love sausage and respect the law should never watch either one being made.

The things that come to those who wait are usually the things left by those who got there first.

Tran Hoang Chuong28-Jun-01 19:37

28-Jun-01 19:37

Hi Christain,
First at all, thanks for your answer. Colorize means the image is drawed by one color. It is same as Colorize Function in ACDSee.

And my mind that I'd like do something same as image processing functions of WinWord.
Thanks in advance.

Ngo Khai Hoa

Christian Graus28-Jun-01 19:42

Christian Graus

28-Jun-01 19:42

Oh, you mean make it all red, green OR blue ? That's easy. Step through the pixels and turn the two colours you don't want to 0. It's useful to actually have a filter that allows you to set a boost or cut to each colour channel.

Christian

#include "std_disclaimer.h"

People who love sausage and respect the law should never watch either one being made.

The things that come to those who wait are usually the things left by those who got there first.

Tran Hoang Chuong28-Jun-01 19:47

28-Jun-01 19:47

Hi Christian
Can you show me more detail for Brightness, Contrast.
Thank you very much.

Ngo Khai Hoa

Christian Graus28-Jun-01 19:56

Christian Graus

28-Jun-01 19:56

If you're stepping through a 24 bit image, then it's like this

unsigned char * pPixel = pMyArray;

for (int y = 0; y < m_Height; y++)
    for (int x = 0; x < m_Width; x++)
   {
        pPixel[0] += m_Brightness;
        pPixel[1] += m_Brightness;
        pPixel[2] += m_Brightness;

        pPixel += 3;
   }

Basically unsigned char runs from 0-255, so you don't need bounds checking. We step through all the bits and add the brightness value, which can be negative. The only thing that is worth mentioning, although it doesn't matter in this case, is that Windows bitmaps are stored as BGR, not RGB.

Here is a contrast filter:

register double red, green, blue;
register double csupp = contrast * (m_offset - 125.0) + 125.0;

for (int y = 0; y < pBmpDest->GetHeight(); ++y)
{ // For each line
register BYTE * pSrcPixel = pSrcLines[y];
register BYTE * pDstPixel = pDstLines[y];

for (register int x = 0; x < destWidth; ++x)
{
// Formel für Kontrastberechnung:
// v = (contrast * (v - 125.0 + m_offset) + 125.0);
red = contrast * ((double) (pSrcPixel[RGBA_RED])) + csupp;
green = contrast * ((double) (pSrcPixel[RGBA_GREEN])) + csupp;
blue = contrast * ((double) (pSrcPixel[RGBA_BLUE])) + csupp;

if(red >= 255.0)
pDstPixel[RGBA_RED] = (BYTE) 255;
else if (red < 0.0)
pDstPixel[RGBA_RED] = (BYTE) 0;
else
pDstPixel[RGBA_RED] = (BYTE) red;

if(green >= 255.0)
pDstPixel[RGBA_GREEN] = (BYTE) 255;
else if (green < 0.0)
pDstPixel[RGBA_GREEN] = (BYTE) 0;
else
pDstPixel[RGBA_GREEN] = (BYTE) green;

if(blue >= 255.0)
pDstPixel[RGBA_BLUE] = (BYTE) 255;
else if (blue < 0.0)
pDstPixel[RGBA_BLUE] = (BYTE) 0;
else
pDstPixel[RGBA_BLUE] = (BYTE) blue;

pSrcPixel += inc;
pDstPixel += inc;
}
}

All the bounds checking is superfluous as I mentioned before. I got this from paintlib, which is available from www.paintlib.de, and has a lot of filter code in it. I'd be happy to send you other filters I have written, including smooth, sharpen, emboss, etc.

Christian

#include "std_disclaimer.h"

People who love sausage and respect the law should never watch either one being made.

The things that come to those who wait are usually the things left by those who got there first.

Tran Hoang Chuong28-Jun-01 20:07