C / C++ / MFC

How to add a class to a MFC Application

2-Dec-07 0:47

Bitmap bmp(...) // using a jpeg file here
Bitmap *pBmp=(Bitmap *)bmp.GetThumbnailImage // the cast works well

Is it safe?

vjasai2-Dec-07 0:26

vjasai

2-Dec-07 0:26

Hi,
i am using Visual Studio 2005. The problem I have is when i select VC++ and MFC application, I am giving a name to the application as ExamSchedule.
In the Sourcefiles.. I am able to see ExamScheuledoc.cpp,ExamScheduleview.cpp and ExamSchedule.cpp. I am adding few controls on to the dialog and doubleclicking on the dialog. So a new popup asking for cpp and .h file for that dialog is coming.
Should I give a new class name or the browse ExamSchedule.cpp file name which is already created.

Also when I am giving new .cpp and .h file, the program is not executing.

Plz let me know how to proceed.

Thanks,
Sai

Re: How to add a class to a MFC Application

Hamid_RT3-Dec-07 19:24

Hamid_RT

3-Dec-07 19:24

What do you want to do and did you get any error when it deosnt work?

High frequency windows Timing - Parallel Port

szymon791-Dec-07 23:48

szymon79

1-Dec-07 23:48

Hi everyone!

Few weeks ago I started to work on private CNC machine project. I’ve done a lot of design work using ProE. Now I am getting into control part. I am using Stepper Motors, which have to be controlled via Parallel Port.

My intent is to make software, which can send impulses on Parallel port pins with desired frequency. I can use Windows built-in timer but it is not enough accurate, I need more than 1000 Hz. For my machine I need something like 45000 Hz or more. I tried to use QueryPerformancecounter using while loop, but it use my CPU a lot. Is there any more accurate timer than 1 ms, which can call Event in windows, like Windows TTimer does? Is it possible to use QueryPerformance Timer or RDTSC, as Event Recalling functions? I am using Visual C++ 2005.

I look forward to your reply.

Best regards

Szymon

Re: High frequency windows Timing - Parallel Port

Cedric Moonen2-Dec-07 1:35

Cedric Moonen

2-Dec-07 1:35

If your target platform is windows, then you can forget your idea: Windows is not a real-time operating system. Which means that you will never be able to have such an accuracy. You'll need to use a real-time operating system for that purpose.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: High frequency windows Timing - Parallel Port

szymon792-Dec-07 1:59

szymon79

2-Dec-07 1:59

Ok.

So what would you propose? What kind of system am I able to use?

What do you think about this kind of software (Mach2, Mach3, http://www.artsoftcontrols.com/artsoft/index/index.htm ) or KCAM. They are installed on windows platform and intended to use to control Stepper Motors via Parallel Port. I can use them of course and I will as last chance but I would rather create something own.

I don't necessarily need Real Time control. I need any possibility to tact Parallel Port Pins with given frequency. Just every help is appreciate...

Thank you

Szymon

convert bmp to pdf ?

keyto1-Dec-07 22:31

keyto

1-Dec-07 22:31

how can i convert bmp image to pdf ?

Re: convert bmp to pdf ?

bob169723-Dec-07 17:08

bob16972

3-Dec-07 17:08

PDF reference (a.k.a "How to convert a bitmap to PDF")[^]

Free C++ CD Burner

Hadi Dayvary1-Dec-07 20:33

Hadi Dayvary

1-Dec-07 20:33

Hi Is there a free C++ library or source code for writing on CD?
I have seen http://www.codeproject.com/system/udfcdr.asp[^] but it crashes my Notebook(sometimes).
Is there any other free library?
thanks

Re: Free C++ CD Burner

Rajesh R Subramanian4-Jan-08 6:44

Rajesh R Subramanian

4-Jan-08 6:44

Google for Infra Recorder. I do not know if it is C++, but it works great.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->ßRÅhmmÃ<-·´¯`·.

use CListCtrl to list thumbnail, using GDI+

followait1-Dec-07 20:22

1-Dec-07 20:22

Because GDI+ support many formats and there is a function Image::GetThumbnailImage.

Is GDI+ not designed not very compatible with MFC?
So not convenient?

Mad | :mad:

Mark Salsbery1-Dec-07 20:31

1-Dec-07 20:31

GDI+ is perfectly compatible with MFC.

It would be silly to wrap GDI+ classes in MFC classes since GDI+ already has a
class-based interface.

The list-view control is the problem. It has no built in functionality for displaying
thumbnail images. There's lots of articles showing how a list-view control can be
enhanced to provide this functionality.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

followait1-Dec-07 20:34

1-Dec-07 20:34

Thanks.

I'll search it agian.

Mark Salsbery1-Dec-07 20:37

1-Dec-07 20:37

Hint: Google "CListCtrl thumbnails" Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

bob169721-Dec-07 21:17

bob16972

1-Dec-07 21:17

Mark Salsbery wrote:
It would be silly to wrap GDI+ classes in MFC classes

I beg to differ. Smile | :)

The GDI+ C++ wrapper classes are absolutely horrible from a MFC programmers perspective. Another MFC-ish wrapper makes life so much nicer even if it costs a tad bit in performance.

Just my two cents

followait1-Dec-07 23:46

GDI+ Bitmap::GetHBITMAP error:

1-Dec-07 23:46

Which one do you mean?
CxImage?

followait1-Dec-07 19:45

1-Dec-07 19:45

Here is the error Infomation:
error C2228: left of '.GetHBITMAP' must have class/struct/union type

Bitmap bmp(LPCTSTR(FilePath));
Color clr(255,0,0,0);
HBITMAP hBmp;
bmp.GetHBITMAP(clr,&hBmp);
CBitmap *pBmp=new CBitmap;
pBmp->FromHandle(hBmp);

PS: why Gdiplus::Black can't be used to replace clr here?

Mark Salsbery1-Dec-07 20:00

1-Dec-07 20:00

Maybe something like this...

Bitmap bmp(LPCTSTR(FilePath));  <font color="Red"><-- what's this?  A WCHAR * is expected here, not a LPCTSTR</font>
HBITMAP hBmp;
bmp.GetHBITMAP(Color::Black, &hBmp);
CBitmap *pBmp=new CBitmap;
pBmp->Attach(hBmp);  <font color="Red">//<-- attaching more permanent than FromHandle()!  Check the docs!</font>

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

followait1-Dec-07 20:06

1-Dec-07 20:06

all right

But what about the error C2228?

Mark Salsbery1-Dec-07 20:09

1-Dec-07 20:09

Missing a header file for GDI+?

It compiles here.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

followait1-Dec-07 20:17

1-Dec-07 20:17

Which in the stdafx.h

<br />
#include "gdiplus.h"<br />
#pragma comment(lib,"gdiplus.lib")<br />
using namespace Gdiplus;<br />

Mark Salsbery1-Dec-07 20:23

1-Dec-07 20:23

followait wrote:
Bitmap bmp(LPCTSTR(FilePath));

The problem is there, which is why I commented on it in red.

What is FilePath? Whatever it is, it needs to be a WCHAR* or converted to a WCHAR*.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

followait1-Dec-07 20:30

1-Dec-07 20:30

Yes, it's ok now. I'm just curious why the error can be report this way, maybe it's the compiler's problem.

Thanxxxxxxxxxxxxxxxxxx

<br />
CString FilePath=ff.GetFilePath();<br />
WCHAR *p=FilePath.AllocSysString();<br />
Bitmap bmp(p);<br />
::SysFreeString(p);<br />
Color clr(255,0,0,0);<br />
HBITMAP hBmp;<br />
bmp.GetHBITMAP(clr,&hBmp);<br />
CBitmap *pBmp=new CBitmap;<br />
pBmp->Attach(hBmp);<br />

Mark Salsbery1-Dec-07 20:33