Re: C++ newbie question: how to rotate and read pixels? - C / C++ / MFC Discussion Boards

Maximilien14-Oct-05 9:04

14-Oct-05 9:04

for your modeless dialog, did you put the dialog variable as either global or as a class member ?

if you do something like

{
  MyDialog dlg;
  dlg.Create(...);
  dlg.ShowWindow(...);
}<pre>

it will only show the dialog in the scope of the current function/method and will be destroyed as soon as you exit the current scope ( function /method ).

 

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

Re: Modless Dialog Box

John R. Shaw14-Oct-05 22:26

John R. Shaw

14-Oct-05 22:26

Very strange! You should not have experienced any of those problems. Simply creating the dialog and showing it should have been enough. If it works, go with it (no harm in this case), and when you have the spare time, try to find out whats realy going on.

INTP
Every thing is relative...

Setting record mixer properties inside app

billiam90414-Oct-05 6:02

billiam904

14-Oct-05 6:02

I need to be able to automatically adjust recording mixer properties from inside my app such as making sure that "Line In" is selected versus Microphone or other device, set record volume to 50% and make sure left/right balance is set to 50%. I have looked at the mixer functions but n ot sure how to proceed. Can someone give me some sample code please? Thank you very much.

Bill Dennis
Orlando, FL

CDHtmlDialog couldn't trap WM_CHAR

Kene14-Oct-05 5:58

Kene

14-Oct-05 5:58

I have tried trapping the WM_CHAR message within a CDHtmlDialog based dialog but couldn't. I used Spy++ and discovered that the messages WM_KEYDOWN,WM_KEYUP and WM_CHAR were actually sent to my dialog. But they don't get passed to my code in either OnChar,OnKeyDown or OnKeyUp.

I need to handle either of the three messages so that I can read from either my barcode scanner or the keyboard. Please help? Cry | :((

What would life be without programmers and salesmen? Suspicious | :suss:

Get the number of bytes a process has written to disk

Lord Bogy14-Oct-05 5:23

Lord Bogy

14-Oct-05 5:23

How could I get the number of bytes a process has written to disk during its run-time on a Windows system?
The process could be any running process like explorer.exe.
I heard there are some ways to do this on other operating systems, like by getting the truss output of the process, but I can't figure out how to do this in Windows.
Could someone suggest any ideas?

Re: Get the number of bytes a process has written to disk

khan++15-Oct-05 0:06

khan++

15-Oct-05 0:06

GetProcessIoCounters(...) is the one to use:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/getprocessiocounters.asp[^]

If you don't have the newer SDK, then do the following:

typedef struct _IO_COUNTERS
{
ULONGLONG ReadOperationCount;
ULONGLONG WriteOperationCount;
ULONGLONG OtherOperationCount;
ULONGLONG ReadTransferCount;
ULONGLONG WriteTransferCount;
ULONGLONG OtherTransferCount;
} IO_COUNTERS, *PIO_COUNTERS;

typedef BOOL (WINAPI* Func)(HANDLE, PIO_COUNTERS pio);

Func GetProc;
HMODULE hModule;
hModule = LoadLibrary("KERNEL32.DLL");
GetProc = (Func)GetProcAddress(hModule,"GetProcessIoCounters");
IO_COUNTERS pc;
BOOL b;
b = GetProc(GetCurrentProcess(),&pc);

Now pc will contain the information.
The second parameter for the function is the one you would want to change to the process you want to view. You can use EnumProcesses(...):
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/base/enumprocesses.asp[^]

this is this.

C++ newbie question: how to rotate and read pixels?

Anonymous14-Oct-05 4:05

Anonymous

14-Oct-05 4:05

Hi folks,

I'm new here and very new to c++ i have however programmed a lot in visual basic.

I have managed to make a window with some controls on it (simple ones) however i have a problem.

How do i read in a gif file and go through it pixel by pixel checking the color? (are there tutorials on this?) then after i have done some calculations how do i rotate the picture like 20 degrees and then save it so i can read the pixels again of the rotated object? (are there any tutorials on this?)

I'm very new to this all but i have to make it for school any help or tips/ideas are welcome

thanks in advance

Re: C++ newbie question: how to rotate and read pixels?

The NULL Developer14-Oct-05 4:15

The NULL Developer

14-Oct-05 4:15

u can use GDI+. The classes Graphics and Image let u manupulate images. see msdn help on GDI+ for more.

"Do first things first, and second things not at all."
— Peter Drucker.

Re: C++ newbie question: how to rotate and read pixels?

Anonymous14-Oct-05 4:47

Anonymous

14-Oct-05 4:47

Hi thanks for the fast reply but i have searched and GDI+ seems to be only for .NET? i have the visual c++ 6 version. Do you have by any chance a tutorial for this subject (a link or so?) i'll try searching further hope you can provide me with some links.

greets

Re: C++ newbie question: how to rotate and read pixels?

C^hris L^osinger14-Oct-05 5:21

C^hris L^osinger

14-Oct-05 5:21

Anonymous wrote:
GDI+ seems to be only for .NET? i

no, you can use it in VC6. for example:

http://www.codeproject.com/vcpp/gdiplus/vc6gdiplusmacro.asp[^]

Cleek | Image Toolkits | Thumbnail maker

Re: C++ newbie question: how to rotate and read pixels?

Anonymous14-Oct-05 6:07

Anonymous

14-Oct-05 6:07

Hmmm but when i eventually make an executable of my program doesn't the users need to install GDI+ also on there computer?

Re: C++ newbie question: how to rotate and read pixels?

C^hris L^osinger14-Oct-05 7:31

C^hris L^osinger

14-Oct-05 7:31

yup.

but there are bitmap classes on CodeProject, and you can find some in the links in my .sig (shameless self-promotion).

Cleek | Image Toolkits | Thumbnail maker

Re: C++ newbie question: how to rotate and read pixels?

Ted Ferenc14-Oct-05 6:32

Ted Ferenc

14-Oct-05 6:32

Get the spec for a GIF file from http://www.wotsit.org/

To rotate, is just simple geometric calculations, a triangle, you know the angle and you know the length of 1 side, applied to each pixel, don't forget the resulting bit map will be larger than the one you started with.

If you search the net you will find better algorithms.

"An education isn't how much you have committed to memory, or even how much you know. It's being able to differentiate between what you do know and what you don't." - Anatole France

How to set a CString as dwData of a TBBUTTON?

Tcpip200514-Oct-05 2:28

Tcpip2005

14-Oct-05 2:28

CString strExtra;
TBBUTTON tbb;
tbb.dwData = strExtra;

Of course ,I can't do it like this.
But how could I do so?
Thank you very much.

Re: How to set a CString as dwData of a TBBUTTON?

David Crow14-Oct-05 3:03

David Crow

14-Oct-05 3:03

What exactly are you trying to accomplish?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: How to set a CString as dwData of a TBBUTTON?

begray14-Oct-05 5:36

begray

14-Oct-05 5:36

maybe like this :

CString * pStr = new CString;
tbb.dwData = (DWORD)pStr;

Re: How to set a CString as dwData of a TBBUTTON?

Arman S.14-Oct-05 9:56

Arman S.

14-Oct-05 9:56

CString strExtra;
TBBUTTON tbb;
tbb.dwData = (DWORD) (LPCTSTR) strExtra;

--
======
Arman

Re: How to set a CString as dwData of a TBBUTTON?

Arman S.14-Oct-05 10:02

Arman S.

14-Oct-05 10:02

CString strExtra;
TBBUTTON tbb;
tbb.dwData = (DWORD) (LPCTSTR) strExtra;

... and why you are doing so?

--
======
Arman

Re: How to set a CString as dwData of a TBBUTTON?

Tcpip200514-Oct-05 17:39

Tcpip2005

14-Oct-05 17:39

Thank you.
I just want to create a self defined toolbar.There is just one command that all the buttons are handled .Only difference is that the buttons have different string attached.
Then I can fetch the string for advanced processing.

Thank you very much.

How to update the View frm other class not from Doc class?

lavate malllik14-Oct-05 2:23

lavate malllik

14-Oct-05 2:23

HI How to update the View from other class not from Doc class?
bye

Re: How to update the View frm other class not from Doc class?

David Crow14-Oct-05 3:06

David Crow

14-Oct-05 3:06

Why do you not want the document to update the view? The view is supposed to render what the document contains. When the document changes, it notifies the view that it needs to be updated. It makes sense that you should be updating the document and let it notify the view through normal channels.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Re: How to update the View frm other class not from Doc class?

Prakash Nadar14-Oct-05 5:44

Prakash Nadar

14-Oct-05 5:44

post message to the windows Wink | ;)

-prakash

Re: How to update the View frm other class not from Doc class?

Arman S.14-Oct-05 9:44

Arman S.

14-Oct-05 9:44

Hi,

// for SDI apps
CFrameWnd *pFrame = (CFrameWnd *) AfxGetMainWnd();
CDocument *pDoc = pFrame->GetActiveDocument();
pDoc->UpdateAllViews(NULL);

// for MDI apps
CMDIChildWnd * pChild =
((CMDIFrameWnd*)(AfxGetApp()->m_pMainWnd))->MDIGetActive();
CDocument *pDoc = pChild->GetActiveDocument();
pDoc->UpdateAllViews(NULL);

--
======
Arman

ODBC with VC++

sirtimid14-Oct-05 1:51

sirtimid

14-Oct-05 1:51

I'm developing an app that opens a connection to a database and makes a massive import to many tables of it.
To do that I open and close the tables several times in some loop statements.
The problem is that, when I open a table the service of the sql server (sqlservr.exe) increases the usage of the cpu it uses.
When I close the table it should release the resources, but it doesn't!

Does anyone know if there is a setting of the sql server that must be changed to do that?

Thanks in advance

sirtimid

Re: ODBC with VC++

David Crow14-Oct-05 3:07

David Crow

14-Oct-05 3:07

sirtimid wrote:
The problem is that, when I open a table the service of the sql server (sqlservr.exe) increases the usage of the cpu it uses.
When I close the table it should release the resources, but it doesn't!

So are you concerned with CPU usage, or resource consumption?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.