private void CellMouseMove(object sender, MouseEventArgs e)
{
if (_mouseIsSelecting)
{
var cell = GetCellElement(sender as UIElement);
if (cell == null)
{
return;
}
if (_selectAnchor == null)
{
_selectAnchor = GetCellElement(cell);
}
if (_selectAnchor.Equals(cell))
{
SelectedCells = new[] { cell };
return;
}
var allRows = _rows.ToList();
var startRow = LiteRow.GetRow(_selectAnchor);
var endRow = LiteRow.GetRow(cell);
var startRowIndex = allRows.IndexOf(startRow);
var endRowIndex = allRows.IndexOf(endRow);
var rowFromIndex = Math.Min(startRowIndex, endRowIndex);
var rowToIndex = Math.Max(startRowIndex, endRowIndex);
var startCellIndex = startRow.Cells.IndexOf(_selectAnchor);
var endCellIndex = endRow.Cells.IndexOf(cell);
var cellFromIndex = Math.Min(startCellIndex, endCellIndex);
var cellToIndex = Math.Max(startCellIndex, endCellIndex);
var selection = new List <UIElement>();
for (var r = rowFromIndex; r <= rowToIndex; r++)
{
var selectRow = allRows[r];
for (var c = cellFromIndex; c <= cellToIndex; c++)
{
var selectCell = selectRow.Cells[c];
selection.Add(selectCell);
}
}
selection.Remove(cell);
selection.Insert(0, cell);
SelectedCells = selection;
}
;
}
