C / C++ / MFC

Re: List of driver compilers

23-Jun-12 14:10

Ok, thanks thats what I wanted.

Simple Thanks and Regards,
Brandon T. H.

Programming in C and C++ now, now developing applications, services and drivers (and maybe some kernel modules...psst kernel-mode drivers...psst).

Many of life's failures are people who did not realize how close they were to success when they gave up. - Thomas Edison

Brandon-X1200023-Jun-12 14:10

Re: List of driver compilers (Why I posted three times)

23-Jun-12 14:10

Ok, thanks thats what I wanted to know.

Brandon-X1200023-Jun-12 15:53

Re: List of driver compilers

23-Jun-12 15:53

Unfortunately my internet was acting weird and posted my message 3 times :S.. could you excuse those please.

fat_boy22-Jun-12 23:35

fat_boy

22-Jun-12 23:35

Just use the DDK, everyone else does, and it works, very very well.

Serial C++

Member 915532121-Jun-12 22:01

Member 9155321

21-Jun-12 22:01

Hi, I have no idea how to start programming C++ for a serial port.
I need some help/ examples for me to start. I tried looking through the net but I have no luck.
I have previously written some simple C++ programs that I can use the keyboard or scanner.

I have a PLC connected through RS232-USB cable to my PC (COM3).
It will send a simple string text like 12A456789, 1288U
It is transmitted through 9600 speed, 8 data bits, 1 stop bit, even parity and flow control none.

Once the program receives the string text, I need to do a simple comparison and save the text to a txt file according to the content received. EG, if contains 1288U, save as 1288U SN.txt. if contains 1288I, save as 1288I SN.txt It should be a simple if and else statement that I can do.

If possible, once the save is completed, the program will send a confirmed message to the PLC (COM3).
Ultimately, I will use bartender commander to extract the txt file for label printing.

Any kind souls can help me with the serial port portion of the C++ program? It will be greatly appreciated. Thanks.

Jochen Arndt21-Jun-12 22:32

Jochen Arndt

21-Jun-12 22:32

I suggest to read the CP article Serial library for C++[^]. The article is a very good introduction to serial I/O with Windows. You may use the provided library or use the sources as base for your own code.

Richard MacCutchan21-Jun-12 22:36

Richard MacCutchan

21-Jun-12 22:36

Lots of samples to get you started here[^].

speaking as ...

David Crow22-Jun-12 2:20

David Crow

22-Jun-12 2:20

See here.

"One man's wage rise is another man's price increase." - Harold Wilson

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How to get list of C++ class names from source code

SoMad23-Jun-12 17:21

SoMad

23-Jun-12 17:21

A great, classic link. Joseph Newcomer has written many great articles. Any beginner can gain knowledge from browsing through his contributions.

Soren Madsen

pandit8421-Jun-12 21:33

pandit84

21-Jun-12 21:33

How to get list of C++ class name from source code. I have created few sequence and class diagram using EA tool which I need to verify. I tried to use sourcmonitor tool but it gives only number of classes in a particular source file. But does not generate any class name list.

Re: How to get list of C++ class names from source code

David Crow22-Jun-12 2:29

David Crow

22-Jun-12 2:29

Some pseudocode to get you started:

Open .h file
Repeat
    Read line from file
    If line starts with "class ", next word is class name
Until EOF
Close file

There may be some situations where this might not work.

Re: How to get list of C++ class names from source code

Sivaraman Dhamodharan22-Jun-12 4:22

Sivaraman Dhamodharan

22-Jun-12 4:22

Ha Ha!! Up voted Man!

Programming Article

error c2071: illegal storage class

jawadali47721-Jun-12 18:36

Re: error c2071: illegal storage class

21-Jun-12 18:36

hi,
i'm using opencv with mfc for image processing and getting this error, "error c2071 : 'CvMouseCallback' illegal storage class", which i don't understand why. the code giving this error is:

typedef void CvMouseCallback( int CV_EVENT_LBUTTONDBCLK, int x, int y, int flags, void* param )

{
	//do some stuff here
}

and it has been defined in header file as

typedef void (CV_CDECL *CvMouseCallback )(int event, int x, int y, int flags, void* param);

can someone help me.

Regards
-J

Peter_in_278021-Jun-12 18:55

Peter_in_2780

21-Jun-12 18:55

jawadali477 wrote:
typedef void CvMouseCallback( int CV_EVENT_LBUTTONDBCLK, int x, int y, int flags, void* param )

{
//do some stuff here
}

When you are defining (writing the code of) your function to handle the callback, you don't want typedef, and you want to USE the typedef from the header file. So what you want is something like

C++

CvMouseCallback my_callback_function(int event, int x, int y, int flags, void *param) 
{
// do stuff
}

Also, you don't want the constant CV_EVENT_LBUTTONDBCLK in your function definition.

Peter

Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

Re: error c2071: illegal storage class

jawadali47721-Jun-12 19:42

Re: error c2071: illegal storage class

21-Jun-12 19:42

thank you Peter for your reply.
i did modified the code as you suggested but now i'm having this errors

error C2660: 'SetDlgItemTextW' : function does not take 2 arguments
error C2660: 'SetDlgItemTextW' : function does not take 2 arguments 
error C2660: 'SetDlgItemTextW' : function does not take 2 arguments 
error C2664: 'cvSetMouseCallback' : cannot convert parameter 2 from 'CvMouseCallback (__cdecl *)(int,int,int,int,void *)' to 'CvMouseCallback'

the lines that are giving this errors are

CvMouseCallback on_mouse( int event, int x, int y, int flags, void* param )

{
	//SetDlgItemText(IDC_Blue, (LPCTSTR) L"ok");
	CvScalar s; 
	CString Blue, Green, Red;
	IplImage* zoomed = (IplImage*) param;

	s=cvGet2D(zoomed,x,y);		// get the (x,y) pixel value 
	Blue.Format(_T("%0.2f"), s.val[0]);
	Green.Format(_T("%0.2f"), s.val[1]);
	Red.Format(_T("%0.2f"), s.val[2]);
	SetDlgItemText(IDC_Blue, Blue);   //error C2660
	SetDlgItemText(IDC_Green, Green);   //error C2660
	SetDlgItemText(IDC_Red, Red);    //error C2660
			
		
}

cvSetMouseCallback("box.png", on_mouse, (void*) zoomed) //error C2664 
(defined some other place);

Parthi_Appu21-Jun-12 21:40

Parthi_Appu

21-Jun-12 21:40

First regarding error C2660, who have used the MFC version of SetDlgItemText, which is a wrapper for Win32 API. If your function is a member of dialog class then the handle to the dialog is passes as a first param. So to get rid of C2660 pass the handle of the dialog as first param and then pass the next two params.

And regarding C2664 the declaration is incorrect. Your callback function should return void with calling convention as CV_CDECL (or equivalent basic calling conevention, check this in your code)

Do your Duty and Don't Worry about the Result

Disable text zooming in Rich Edit control.

Member 225379321-Jun-12 14:12

Member 2253793

21-Jun-12 14:12

I have rich control used in my project display the current activity. It should only allow the copying of that log. Now the issue is using Ctrl+Shift+> keys user able to zoom that text, what should we do to disable that feature?

Live life happily until your last second

Re: Disable text zooming in Rich Edit control.

Brandon-X1200021-Jun-12 21:30

21-Jun-12 21:30

I'm not sure if you can properly disable it's zooming function, but you could interfere the event, by doing the following below.

You could probably add a timer OR a key down event on your form/window when those three key combos are set, it immediately forces the rich text box back to it's original zoom config. or you could just set a timer to an interval of 100 and let your timer reset the rich text box's zoom config. over and over. Big Grin | :-D

opencv with MFC

jawadali47720-Jun-12 18:39

20-Jun-12 18:39

hi,
i am developing a program using MFC in vs2008. i'm using opencv lib with MFC for image processing. part of the program has been developed where i can open an image residing in a file. now i wanted to get the coordinates of the opened image with double click of mouse on the image using mouse callback function. can any one help me regarding this?

Regards
Jawad

modified 21-Jun-12 5:50am.

Richard MacCutchan20-Jun-12 23:55

Richard MacCutchan

20-Jun-12 23:55

jawadali477 wrote:
get the coordinates of the opened image with double click of mouse on the image using mouse callback function.

When you click on any Window you will get a notification from the system which includes the location of the mouse when it was clicked. See here[^] for details of each specific message.

speaking as ...

Sivaraman Dhamodharan21-Jun-12 1:48

Sivaraman Dhamodharan

21-Jun-12 1:48

Quote:
get the coordinates of the opened image

You mean you want to get the Image Height and Width. What Co-ordinate you are talking about?

Programming Article

jawadali47721-Jun-12 18:16

21-Jun-12 18:16

yes, i'm talking about the pixel coordinates (i.e pixel height and width).