public Point GetPositionFromCharIndex(int charIndex)
{
var offset = new TextRange(ContentStart, textBox.CaretPosition)
.Start
.GetPositionAtOffset(charIndex, LogicalDirection.Forward);
return(offset != null
? offset.GetCharacterRect(LogicalDirection.Forward).BottomLeft
: new Point(0, 0));
}
private void MoveCaretToDirection(LogicalDirection pDirection)
{
var lTextPointer = new TextRange(NumericDisplay.ContentStart, NumericDisplay.ContentEnd).End;
var lRect = lTextPointer.GetCharacterRect(pDirection);
var lCaretLocationX = lRect.X;
var lCaretLocationY = lRect.Y;
if (!double.IsInfinity(lCaretLocationX))
Canvas.SetLeft(Caret, lCaretLocationX);
if (!double.IsInfinity(lCaretLocationY))
Canvas.SetTop(Caret, lCaretLocationY);
}
