C / C++ / MFC

Re: How to send a message from a object to its parents?

12-Apr-05 22:54

Hi again,
Still rumbling on with that old problem? What you are about to do here is not such a bad idea, but I found this in msdn which might help you more: TN062[^]

Joel Holdsworth

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thanh-hai.bui13-Apr-05 0:50

thanh-hai.bui

13-Apr-05 0:50

thanks for your help!

the old problem is fixed. If fact, we must call SetEventMask.

i saw article TN062, but i don't know how to create a ON_NOTIFY_REFLECT with ClassWizard (or manual)?

Can u give me something more? For example : how to creat ON_NOTIFY_REFLECT, how dose that means its parameter?, and how to get it (parameters)?

thanks

hzocm

Re: How to send a message from a object to its parents?

ThatsAlok12-Apr-05 23:01

ThatsAlok

12-Apr-05 23:01

Try GetParent(..) Api

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Conversion to LONGLONG

fardak12-Apr-05 21:57

12-Apr-05 21:57

I have a CString mystring defined like this:
mystring="FFFFFFFFFFFFFFFF";//16 F
How can I convert programatically that to a LONLONG ?
Thanks for any help.

Joel Holdsworth12-Apr-05 22:17

12-Apr-05 22:17

Good morning fardak. I've got some code for you here. Hopefully it will be less messed up than yesterday's effort:

LONGLONG result = 0;
int cursor = 0;
int length = _tcslen(mystring);

for(int i = 0; i < length; i++)
{
	result <<= 4;
	if(mystring[i] >= _T('0') && mystring[i] <= _T('9'))
		result |= (mystring[i] - _T('0')) & 0x0F;
	else if(mystring[i] >= _T('a') && mystring[i] <= _T('f'))
		result |= (mystring[i] - _T('a') + 10) & 0x0F;
	else if(mystring[i] >= _T('A') && mystring[i] <= _T('F'))
		result |= (mystring[i] - _T('A') + 10) & 0x0F;
	else if(mystring[i] != _T(' ') &&
		mystring[i] != _T('\t'))	// Any characters that you want to ignore
		break;				// Otherwise stop scanning if we encounter any non-hex characters
	cursor++;
	if(cursor >= sizeof(result) * 2)	// Stop scanning when we reach the require number of digits
		break;				// You could have an "overflow" error message sent here, if you want
}

Hope this helps you.

Joel Holdsworth

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Check out my online CV and project history[^]

fardak12-Apr-05 22:34

12-Apr-05 22:34

Good morning Joel,and thanks for your prompt answer.
My God I am not that fast programming!
I'll study your code try it and get back to you as soon as I can.
Have a nice day.

Joel Holdsworth12-Apr-05 22:44

12-Apr-05 22:44

Just noticed one minor bug. The code should be like this:

LONGLONG result = 0;
int cursor = 0;
int length = _tcslen(mystring);

for(int i = 0; i < length; i++)
{
	result <<= 4;
	if(mystring[i] >= _T('0') && mystring[i] <= _T('9'))
		result |= (mystring[i] - _T('0'));
	else if(mystring[i] >= _T('a') && mystring[i] <= _T('f'))
		result |= (mystring[i] - _T('a') + 10);
	else if(mystring[i] >= _T('A') && mystring[i] <= _T('F'))
		result |= (mystring[i] - _T('A') + 10);
	else if(mystring[i] == _T(' ') ||
		mystring[i] == _T('\t'))	// Any characters that you want to ignore
		continue;				// Otherwise stop scanning if we encounter any non-hex characters
	else break;
	cursor++;
	if(cursor >= sizeof(result) * 2)	// Stop scanning when we reach the require number of digits
		break;				// You could have an "overflow" error message sent here, if you want
}

The reason I'm making all these mistakes, is that i've got no compiler to test this stuff on right now!

Joel Holdsworth

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Check out my online CV and project history[^]

fardak12-Apr-05 23:27

12-Apr-05 23:27

Thanks.
I did not study the code yet,but both codes compile without error and both give the same result.
I put the code in a function and added these three lines to se the result.
///////////////////////
CString message;
message.Format("%16x",result);
SetDlgItemText(IDC_MYRESULT,message);//Edit trol
///////////////////////////////////
The string I gave is "fffffffffffffff" //16 f
The answer I've got is :
ffffffff //8f !!
So it is as if the high "ffffffff" are ignored !
Maybe the loop should be extended ??

Joel Holdsworth12-Apr-05 23:39

12-Apr-05 23:39

Yeah, that's what you'd expect. As this article[^] explains putting %x will only cause an int (32 bits) to be printed not your LONGLONG (64 bits). You could try something like this instead:

message.Format("%8x%8x", (int)(result>>32), (int)(result & 0xFFFFFFFF));

I've simply split the upper and lower dwords out, and then printed them one after another!

Joel Holdsworth

Wanna give me a job this summer?
Check out my online CV and project history[^]

fardak13-Apr-05 0:02

13-Apr-05 0:02

I changed the "message.Format(..)" as you suggested,and the code compiles,runs and gives the result expected(i.e both dwords are dislpayed in the edit control).
Thank you so much for your time and effort.
I am sure your skill will be soon appreciated by someone.
Good luck.

David Crow13-Apr-05 2:36

David Crow

13-Apr-05 2:36

What about using:

message.Format("%I64x", ...);

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Joel Holdsworth13-Apr-05 3:21

13-Apr-05 3:21

Ah yes... Well I've never used that one before!

Joel Holdsworth

Wanna give me a job this summer?
Check out my online CV and project history[^]

fardak13-Apr-05 4:42

13-Apr-05 4:42

Thank for your time.
It works perfectly well.

Michael Dunn13-Apr-05 2:20

Michael Dunn

13-Apr-05 2:20

Use _atoi64()

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fardak13-Apr-05 4:35

13-Apr-05 4:35

Thank you.
I have difficulty formatting a string to display the result.
Here is what I wrote:
//////////////////////////////////
CString message;
_int64 myNb;
myNb=_atoi64("FFFFFFFFFFFFFFFF");
message.Format("%16X",myNb);//WRONG
How the formating should be written ?
Thanks for any help.