C / C++ / MFC

Iain Clarke, Warrior Programmer26-Jun-08 0:17

Re: how to calculate all columns amount? [modified]

26-Jun-08 0:17

So, you have a block of bytes, and you know it is W wide, and H high.

First - images often have the width padded by 4. Check whether this is the case or not.

void Count255s (BYTE *blob, UINT W, UINT H)
{
   UINT nColumnCounts [W]; // W columns...
   UINT x,y;

   // clear counts.
   for (x = 0; x < W; x++)  nColumnCounts [x] = 0;

   for (y = 0; y < H; y++)
   {
       for (x = 0; x < W; x++)
       {
           if (blob [x + y*W] == 255)
                nColumnCounts [x] += 1;
       }
    }

    // now we have counts!
    DoSomethingwithCounts (W, nColumnCounts);
}

There's no error checking, and there are more efficient ways of doing this, but this should be fairly clear for you, I hope.

You could replace the check with:

if (*blob++ == 255)

to remove the expensive multiplication, but I'd avoid that unless you are very happy with pointers.

Did that help at all?

Iain.

Plz sir... ^CPallini ^CPallini abuz drugz, plz plz help urgent.

gentleguy26-Jun-08 1:28

gentleguy

26-Jun-08 1:28

thanks a lot. very helpful, how can i save each column amount? thanks, sorry ask many

by the way, why you use the third for loop? don't understnad.could you give me any explanation. thanks a lot

gentleguy

modified on Thursday, June 26, 2008 7:50 AM

Iain Clarke, Warrior Programmer26-Jun-08 2:23

26-Jun-08 2:23

1st for loop is to zero out all the counts. I put the action bit on the same line as the loops, which might have been a bad idea...

2nd and 3rd loops are going through the x,y coords of your data. If you were just looking for the grand total of 255s, you could have done it in one. But as you need to keep track of which column you're on, you need a 2D loop pair.

As for saving the column amount - however you like. If you just take my code and use it, you're in trouble. It's there to help you write your own. The answer to your question depends on your application, and how you put data into your histogram.

You could create a CArray, and pass a pointer or reference to it to the count function, then the results would be available outside the function.

Or you could have a CHistogram::InitialiseFromBitmapData function, and keep the results internally.

Or... lots more choices.

Iain.

Plz sir... ^CPallini ^CPallini abuz drugz, plz plz help urgent.

gentleguy26-Jun-08 15:23

gentleguy

26-Jun-08 15:23

thanks a lot. here i will explain to you something, when i calculate 255 for each column, i just can start to scan my data(2-D) from left bottom, and then up row by row,do you understand me? thanks a lot, and disturb you a lot.

gentleguy

Iain Clarke, Warrior Programmer26-Jun-08 21:46

26-Jun-08 21:46

gentleguy wrote:
do you understand me?

Not really...

The code I showed assumed that the data was row after row - I didn't assume whether I was starting with top left or bottom left - I've seen bitmap formats of both kind.

If your data is stored differently, you can change the maths inside the [ and ] to look it up differently.

Good luck,

Iain.

Plz sir... ^CPallini ^CPallini abuz drugz, plz plz help urgent.

Hamid_RT27-Jun-08 8:13

Hamid_RT

27-Jun-08 8:13

Can you use of Listctrl?

gentleguy28-Jun-08 1:07

gentleguy

28-Jun-08 1:07

i am not sure for this. i tried many times, still couldn't finish it. do you have any other idea, thanks

gentleguy

Sort by Date

manju#12325-Jun-08 23:05

25-Jun-08 23:05

Hi all..
I am storing some mails in XML Format...Now i want to Sort them and store in XML File by MailDate wise...
My mail dates are
///////////////////////////////
CString mailDate;
////////////////////////////
I am getting date in this format..
20080430 8:36:05
20080423 13:49:19
20080402 14:56:50
20080402 14:21:11........

How i Can Compare and Sort them...
plz give me some idea

Thanking you
manju

Hi..
I am Mnaju.I have Completed my B.E Computers Science.Lokking for a job.I am interested in VC++
manju

Rajesh R Subramanian25-Jun-08 23:09

Rajesh R Subramanian

25-Jun-08 23:09

I offered you a suggestion previously on this issue. What happened to that? Why is a date stored as a string in your program? If you have it as a COleDateTime object, you could use the COleDateTime Relational Operators[^].

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

manju#12325-Jun-08 23:24

25-Jun-08 23:24

Actually We are reading from the mails and storing as a "CHAR" in Structure..

<br />
typedef struct {<br />
<br />
	LONG iMBUserMailBoxSize;<br />
	LONG iMBUserMailCount;<br />
	LONG iMBUserMailSize;<br />
	LONG iMBUserMailAttachFileCount;<br />
	BOOL bMBUserMailHasAttachment;	<br />
	TCHAR cMBUserMailPath[MAX_PATH_LEN];<br />
	TCHAR cMBUserMailFrom[MAX_PATH_LEN];<br />
	TCHAR cMBUserMailFromEmail[MAX_PATH_LEN];<br />
	TCHAR cMBUserMailFromName[MAX_PATH_LEN];<br />
	TCHAR cMBUserMailBcc[MAX_PATH_LEN];<br />
	TCHAR cMBUserMailCc[MAX_PATH_LEN];<br />
	TCHAR cMBUserMailDate[MAX_DATE_LEN];	<br />
	TCHAR cMBUserMailSubject[MAX_PATH_LEN];<br />
	TCHAR cMBUserMailTextDesc[MAX_MAIL_SIZE];<br />
	ACL_STRUCT_MBUSERS_MAIL_ATTCH ACL_ATTACH[MAX_ATTACH_COUNT];<br />
	<br />
} ACL_STRUCT_MBUSERS_MAIL;

First we get a MailDate it is in "TCHAR"......

After that we changed it to CString to Remove "/" operator....thats it..

manju

Hi..
I am Mnaju.I have Completed my B.E Computers Science.Lokking for a job.I am interested in VC++
manju

Rajesh R Subramanian25-Jun-08 23:40

Rajesh R Subramanian

25-Jun-08 23:40

manju#123 wrote:
Actually We are reading from the mails and storing as a "CHAR" in Structure..

Don't store it as a char, store it as a COleDateTime. That's all I have to offer.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

manju#12325-Jun-08 23:44

25-Jun-08 23:44

Rajesh R Subramanian wrote:
store it as a COleDateTime.

Ok i will change it COleDateTime...

Thank you

manju

Hi..
I am Mnaju.I have Completed my B.E Computers Science.Lokking for a job.I am interested in VC++
manju

manju#12325-Jun-08 23:45

25-Jun-08 23:45

Rajesh R Subramanian wrote:
store it as a COleDateTime.

Ok i will change it as COleDateTime...

Thank you for your suggestion

manju

Hi..
I am Mnaju.I have Completed my B.E Computers Science.Lokking for a job.I am interested in VC++
manju

manju#12325-Jun-08 23:47

25-Jun-08 23:47

One more thing..
If MailDate is in CString...We can Sort it or not..

thank you
manju

Hi..
I am Mnaju.I have Completed my B.E Computers Science.Lokking for a job.I am interested in VC++
manju

Rajesh R Subramanian25-Jun-08 23:58

Rajesh R Subramanian

25-Jun-08 23:58

manju#123 wrote:
If MailDate is in CString...We can Sort it or not..

If you have it as a COleDateTime object, the job would be easier for you as the relational operators are defined for that class. Doing it with a CString will be known as a "Coding horror".

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

manju#12326-Jun-08 0:09

displaying the integers in multiple lines in an edit box?

26-Jun-08 0:09

Thank you.
I will change Char to COleDateTime and Check it...

manju

Hi..
I am Mnaju.I have Completed my B.E Computers Science.Lokking for a job.I am interested in VC++
manju

MahaKh25-Jun-08 21:44

Re: displaying the integers in multiple lines in an edit box?

25-Jun-08 21:44

i am displying the integers in edit box by using SetDlgItemInt the output is overwritten but i want to display it in multiple lines like a sequence....plz n e budy help me out!!!!

Iain Clarke, Warrior Programmer25-Jun-08 21:56

displaing the integers in multiple lines in an edit box?

25-Jun-08 21:56

Not sure which of your questions to reply to... This one, or the one from one minute earlier... I'll assume it was some sort of error.

There is a edit box style to allow it to have multiple lines, but that would require you to get the text, add a carriage return and the new number, then set the text. Very inefficient.

Instead, I would recommend a list box, with the sort style turned off. Then you can just add a new string / number to the end, and let windows do the hard work.

eg:

void CMyDlg::AddNumberToListBox (int nValue)
{
    CListBox *lb = (CListBox *)GetDlgItem (IDC_MYLISTBOX);

    CString s;
    s.Format ("%i", nValue);
    int nSel = lb->AddString (s);
    if (nSel != LB_ERR)
        lb->SetCurSel (nSel);
}

Good luck,

Iain.

Plz sir... ^CPallini ^CPallini abuz drugz, plz plz help urgent.

MahaKh25-Jun-08 21:43

Re: displaing the integers in multiple lines in an edit box?

25-Jun-08 21:43

i am displying the integers in edit box by using SetDlgItemInt the output is overwritten but i want to display it in multiple lines like a sequence....plz n e budy help me out!!!!

_AnsHUMAN_ 25-Jun-08 21:50

_AnsHUMAN_

25-Jun-08 21:50

I guess you didn't check the multiline property of the edit box to true in properties. Also set the "want return" property to true if you want that on pressing enter key the caret should move to the next line,
Also do remember, every time you set a new value to the edit box you need to take the existing values, append new value to it and then display it.
BTW why don't you use a LISTBOX

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: displaing the integers in multiple lines in an edit box?

MahaKh25-Jun-08 22:02

Re: displaing the integers in multiple lines in an edit box? [modified]

25-Jun-08 22:02

thanx a lot, i m gona try it.... the reason not to use listBox is that it only takes string values, but i need to show integers

_AnsHUMAN_ 25-Jun-08 22:20

_AnsHUMAN_

25-Jun-08 22:20

You just have to use a single line of code to convert an integer to a string. or use SetItemData[Listbox]. It's that simple

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

modified on Thursday, June 26, 2008 4:56 AM

Re: displaing the integers in multiple lines in an edit box?

SandipG 25-Jun-08 22:00

SandipG

25-Jun-08 22:00

Instead of textbox why dont you try listbox.

And if you have no choice then as anshuman said set all those properties
plus you cant use SetDlgItemInt in this case.

You have to take the string using GetWindowText(..) everytime you want to update then append the new string to it and call SetWindowText(..) again.

I hope it helps..

Regards,
Sandip.

Re: displaing the integers in multiple lines in an edit box?

MahaKh25-Jun-08 22:06