Qt-interest Archive, October 2007
locate/position/indicate cursor's line and column?
Message 1 in thread
Dear Users of QTextEdit, QTextBrowser, or XML players,
When a DOM parser fails to setContent it tells an errorLine and an
errorColumn. I wish to locate them by putting a cursor right on the spot.
Qt4 is awkward to do cursor positioning. QTextEdit has a method
setTextCursor. Problem is there is no method in QTextCursor to position
a cursor at a given line and column, instead, it takes a position
refering to the beginning of the document.
Should I count each line-break and calculate the position?
int lineCount = 0, lastPosition = 0, index;
forever{
index = m_content.indexOf("\n", lastPosition);
if(index == -1) break;
lineCount ++; if(lineCount == errorLine) break;
lastPosition = index + 1;
};
If(index != -1)
{
int pos = index + errorColumn;
cursor.setPosition(pos, QTextCursor::MoveAnchor);
textEdit->setTextCursor(cursor);
}
This sounds awkward in Qt4.
Is there a better way to locate/position/indicate cursor's line and column?
Thanks,
Lingfa
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