selectPositionAt method
Select text between the global positions from
and to
.
from
corresponds to the TextSelection.baseOffset, and to
corresponds
to the TextSelection.extentOffset.
Implementation
void selectPositionAt(
{required Offset from,
Offset? to,
required SelectionChangedCause cause}) {
_layoutText(
minHeight: constraints.minHeight, maxHeight: constraints.maxHeight);
final fromPosition =
_textPainter.getPositionForOffset(globalToLocal(from - _paintOffset));
final toPosition = (to == null)
? null
: _textPainter.getPositionForOffset(globalToLocal(to - _paintOffset));
final baseOffset = fromPosition.offset;
final extentOffset = toPosition?.offset ?? fromPosition.offset;
final newSelection = TextSelection(
baseOffset: baseOffset,
extentOffset: extentOffset,
affinity: fromPosition.affinity,
);
_setSelection(newSelection, cause);
}