C / C++ / MFC

7-Mar-03 2:52

You might want to check out MemWatcher[^].

It's not a developer's tool, but it can help keep your PC running smoothly over long periods of time by freeing up memory that Windows thinks is in use. It works especially well on Win9X and ME which frequently "runs out of memory" when it shouldn't.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Openig RAW images

djordj6-Mar-03 4:53

djordj

6-Mar-03 4:53

I've got some RAW images and I have to open and process them: so I thought it was a good idea to get them and load them into CBitmap objects, in order to use MFC GID function, instad of readin each pixel with two FOR cycles.

RAW images have no header and they are 35MB large, I've tried this way:
*) CFile file;
*) BYTE* pData = new BYTE[fileSize];
*) file.Open(path, CFile::modeRead);
*) file.ReadHuge(pData, fileSize);
*) file.close();
*) m_bmp.CreateBitmap(m_BmWidth, m_BmHeight, 1, m_BmBpp, pData);

Variables are class attributes.
Debugging the code, is like I can't get the CreateBitmap method working.

Re: Openig RAW images

C^hris L^osinger6-Mar-03 5:40

6-Mar-03 5:40

1. RAW (almost by definition) has no specified format. it's usually the 'raw' uncorrected data dump from a CCD, scanner or some other device, in some undocumented format, not meant for your use.

2. CreateBitmap expects the data to be in a specific format, one which .RAW almost certainly doesn't conform to. (specifically, word-aligned pixel rows, probably with bottom-up scanlines and in BGR/BGRA channel order for 24/32 bpp images)

your best bet is to try to find out the format that your particular "RAW" image uses (good luck, and don't assume it applies to every other file with a .RAW extension), parse it into the format that CreateBitmap expects (32-bit RGBx is probably the easiest). then, you might get an image, though it will likely be in some color space (maybe logarithmic RGB , for fun) that you'll need to post-process. and, the image might need color balancing, color correction, sharpening, scaling, etc. before it looks like any kind of reasonable image.

Smile | :)

-c

When history comes, it always takes you by surprise.

Re: Openig RAW images

djordj6-Mar-03 5:42

djordj

6-Mar-03 5:42

So I have to scan the whole 35MB with two FOR cycles, bulding my matrix?

Re: Openig RAW images

C^hris L^osinger6-Mar-03 7:40

6-Mar-03 7:40

yes, unless by some wild coincidence, the format of your particular .RAW file is the same format the CreateBitmap wants.

-c

When history comes, it always takes you by surprise.

catch text changes inside MDI

Zizilamoroso6-Mar-03 4:41

Zizilamoroso

6-Mar-03 4:41

When using CRichEditCtrl, you can catch the ENM_CHANGE message when you want to be notified of text changes.

But, I'm using CRichEditView inside an MDI-application. How can I get notified of text changes?

I don't want to catch WM_KEYUP cause then I have to catch all events like WM_LBUTTONUP, WM_RBUTTONUP, drag&drop events, copypaste events, ...
And when I want to add a message/event handler, there's no such thing as a ENM_CHANGE event.

using: [VISUAL STUDIO 6.0 sp5] [WIN98/2]

Re: catch text changes inside MDI

Chris Richardson6-Mar-03 9:46

Chris Richardson

6-Mar-03 9:46

You should look for the EN_CHANGE notification. The ENM_CHANGE flag is used in conjunction with EM_SETEVENTMASK message to let the rich edit control you want to receive EN_CHANGE notifications.

Chris Richardson

C/C++ Include Finder[^]

links or docs about GUI design for database applications

Braulio Dez6-Mar-03 4:19

Braulio Dez

6-Mar-03 4:19

Hi,

Where can I find some doc or some link to a site, where explains some good thecnics about GUI "database" app design ( for desktop applications) ?

Thanks in advance

Braulio

Ps.: I want to use Disconnected dataset in my apps.

Determining if a CPoint belogs to a line

Crercio O. Silva6-Mar-03 4:14

Crercio O. Silva

6-Mar-03 4:14

Given a Line (CPoint from, CPoint to), how to determine if a CPoint p belongs to the line?

Thanks in advance for any lights.

[]s

Crercio O. Silva / DBTools Development
http://www.dbtools.com.br

Re: Determining if a CPoint belogs to a line

C^hris L^osinger6-Mar-03 4:24

6-Mar-03 4:24

google can really help in these situations:

http://astronomy.swin.edu.au/~pbourke/geometry/pointline/[^]

-c

When history comes, it always takes you by surprise.

Re: Modal dialog question

Modal dialog question

ns6-Mar-03 4:13

6-Mar-03 4:13

If I have a modal dlg, and post a message to the parent, can it send me back the results (by passing in the data through a member function of my dlg in the ONMessageHandler), so that I can communicate back and forth and display info returned from the parent when I ask for it? Then when I am all done, I dismiss it....I would test it out but it needs a lot of machinery to put into place and I was wondering if its obvious that this will/wont work....?

Appreciate your help,
ns

C^hris L^osinger6-Mar-03 4:28

6-Mar-03 4:28

ns wrote:
can it send me back the results (by passing in the data through a member function of my dlg

yes. just be careful of infinite loops (where posting a message causes an action that causes the same message to be posted again).

-c

When history comes, it always takes you by surprise.

ok. thanks.

ns6-Mar-03 4:51

6-Mar-03 4:51

MAny thanks. I plan to display a sequence of images in the cDialog which are sent from the parent in response to the users request from the Cdialog. For some reason I had thought that since it was modal it couldnt be dynamically refreshed unless it was dismissed and reModal-ed with the new info....

Appreciate your help,
ns

Ravi Bhavnani6-Mar-03 8:40

6-Mar-03 8:40

If you want to maintain a synchronous conversation, use SendMessage() instead of PostMessage().

Yes, I'm back (after an 8 week medical emergency).

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

ns6-Mar-03 8:49

6-Mar-03 8:49

Good point. Thanks.
I was wondering where you went to! Hope you're feeling better. Take care!!

Appreciate your help,
ns

Ravi Bhavnani7-Mar-03 2:35

7-Mar-03 2:35

I'm fine. Actually my dad fell seriously ill, but he's much better now.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

ns7-Mar-03 2:42

7-Mar-03 2:42

Glad to hear he's okay. Last night at 3 AM I trashed my XP at home --- was installing SP1 XP and it froze so I pulled the plug. That was the end of it. I've had it with XP (it doesnt like to run unattended all week long). I am reinstalling win2K today. Lost nothing too crucial since it was new and my works all at the office. So my half day today is going to be spent messing with that stuff..and all the software it needs. Aaaaaragh!

Rewrite #2 of my project at work.... quite fun. Whats happening with the deal you had going in Dec?
see ya

Appreciate your help,
ns

Ravi Bhavnani7-Mar-03 2:48