QTextEdit: how to get lines?

[claudio]

I have a QTextEdit and the user writes some text in it. How can I get the lines exactly the same way as they are displayed on the screen? I have to get every line start and line end - if possible the absolute text position *and* the y position of the line.

Thanks for any help!
Claudio

[patrik08]

I have a QTextEdit and the user writes some text in it. How can I get the lines exactly the same way as they are displayed on the screen? I have to get every line start and line end - if possible the absolute text position *and* the y position of the line.

Thanks for any help!
Claudio

here is a sample to get line ...
from http://juffed.googlecode.com/svn/trunk/qedit/qtedit.cpp

my own first projekt
http://www.qt-apps.org/content/show....?content=59422

as editor now i use only http://www.riverbankcomputing.co.uk/...illa/index.php having all

QString TextEdit::GrepTextLines(int startline, int stopline )
{
QStringList  cuttextlist;
cuttextlist.clear();
int xli = 1;
for ( QTextBlock block = document()->begin(); block.isValid(); block = block.next(), xli++) {
   if (xli == startline || xli > startline) {
            if (xli == stopline || xli < stopline) {
            cuttextlist.append(GrepLineFromTxBloc(block));
            ////////qDebug() << "### cat line GrepTextLines  " << xli;
            }
   }
}
return cuttextlist.join("\n");
}
 
QString TextEdit::GrepLineFromTxBloc( QTextBlock block )
{
        QString linetext = "";
        if ( m_tabSpaces )   /* if tabulator key on to indent text ? */
        {
            int nbSpaces = tabStopWidth() / fontMetrics().width( " " );
            for (int i = 0; i<nbSpaces; i++)  {
                linetext.append( " " );
            }
            linetext.append(block.text());
 
        } else {
        linetext.append(block.text());
        }
 
  return linetext;
}

QString TextEdit::GrepTextLines(int startline, int stopline )
{
QStringList  cuttextlist;
cuttextlist.clear();
int xli = 1;
for ( QTextBlock block = document()->begin(); block.isValid(); block = block.next(), xli++) {
   if (xli == startline || xli > startline) {
            if (xli == stopline || xli < stopline) {
            cuttextlist.append(GrepLineFromTxBloc(block));
            ////////qDebug() << "### cat line GrepTextLines  " << xli;
            }
   }
}
return cuttextlist.join("\n");
}

QString TextEdit::GrepLineFromTxBloc( QTextBlock block )
{
        QString linetext = "";
        if ( m_tabSpaces )   /* if tabulator key on to indent text ? */
        {
            int nbSpaces = tabStopWidth() / fontMetrics().width( " " );
            for (int i = 0; i<nbSpaces; i++)  {
                linetext.append( " " );
            }
            linetext.append(block.text());
          
        } else {
        linetext.append(block.text());
        }

  return linetext;
}

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[claudio]

Yea, great! This is my code for scanning the blocks on a mouse move event:

for(QTextBlock block = document()->begin(); block.isValid(); block = block.next()) {
    if(block.contains(textpos)) {
      int posinblock = textpos - block.position();
      if(block.layout()->isValidCursorPosition(posinblock)) {
        QTextLine tl = block.layout()->lineForTextPosition(posinblock);
        int linestartpos = block.position() + tl.textStart();
        emit onMouseMoveTextLineStartPos(linestartpos);
      }
      break;
    }
  }

for(QTextBlock block = document()->begin(); block.isValid(); block = block.next()) {
    if(block.contains(textpos)) {
      int posinblock = textpos - block.position();
      if(block.layout()->isValidCursorPosition(posinblock)) {
        QTextLine tl = block.layout()->lineForTextPosition(posinblock);
        int linestartpos = block.position() + tl.textStart();
        emit onMouseMoveTextLineStartPos(linestartpos);
      }
      break;
    }
  }

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Thanks for your help, patrik08!