Question

CRichEditCtrl Line No.

Asked by: v_iyengar

i am using  CRichEditView in my program . i want to show the current line number and coloum number in my status bar as seen in all general editor(like our own vc++ editor).
how can i achieve this.

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Asked On
2000-07-27 at 08:37:40ID10829762
Tags

cricheditctrl

,

line

,

number

Topic

Windows MFC Programming

Participating Experts
3
Points
10
Comments
7

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Answers

 

by: cypherljkPosted on 2000-07-27 at 08:50:21ID: 3618819

I saw a suggestion on a similar question where u count the number of '\n' line characters in the RichEdit control and that would give you your line count.  Then display the information in your status bar. Don't know about the column tho.
My 2 cents.

 

by: v_iyengarPosted on 2000-07-27 at 08:57:37ID: 3619056

but counting no of \n will be too costly
if i move the mouse and click at some place the i have to count the number of \n from start of the file
..this will take a long time

 

by: superstarrPosted on 2000-07-27 at 13:42:22ID: 3625798

Can't you get the underlying CRichEditCtrl by calling CRichEditView::GetRichEditCtrl() and then use its member functions to find line number of that cursor?

Ie:

CRichEditCtrl edit = myRichEditView.GetRichEditCtrl();
long lineNum = edit.LineFromChar(-1);

According to MSDN, LineFromChar with a -1 as the argument returns the 'current line, that is, the line that contains the caret'...

 

by: v_iyengarPosted on 2000-07-27 at 23:55:07ID: 3635159

tanku superstarr  .I got the line no.
how to get coloum No?

 

by: superstarrPosted on 2000-07-28 at 08:27:48ID: 3646813

Ok, given the code I already suggested:

nt idxOfLine = edit.LineIndex(lineNum); // or
int idxOfLine = edit.LineIndex(-1); // line index of current line

long startPos, endPos;
int colPos;

edit.GetSel(&startPos, endPos);
colPos = startPos - idxOfLine;

// colPos should be the column of where the caret is and lineNum should be the line/row where the caret is.

Basic algorithm is to get the index of the first character on that line and get the index of the character you're interested in, subtract the first from the second and that should be column number.

 

by: cypherljkPosted on 2000-07-28 at 16:37:41ID: 3657059

good line of thought, wish i'd thought of that
My 2 cents.

 

by: mikezangPosted on 2000-09-13 at 09:16:40ID: 4292073

Right answer is
    // Get caret line number
    int nLine = cEdit.LineFromChar(-1); // line index of current line

    long lStart, lEnd;
    cEdit.GetSel(lStart, lEnd);

    int nFirst = cEdit.LineIndex();

    // Get caret column
    int nCol = lStart - nFirst;

20120131-EE-VQP-002

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