private void ProcessExtendSelection(GridPanel panel, bool extend)
{
int startIndex = panel.Columns.GetDisplayIndex(panel.SelectionColumnAnchor);
int endIndex = panel.Columns.GetDisplayIndex(_HitColumn);
if (startIndex > endIndex)
{
int tempIndex = startIndex;
startIndex = endIndex;
endIndex = tempIndex;
}
if (panel.OnlyColumnsSelected(startIndex, endIndex) == false)
{
if (extend == false)
panel.ClearAll();
int[] map = panel.Columns.DisplayIndexMap;
for (int i = 0; i < map.Length; i++)
{
GridColumn column = panel.Columns[map[i]];
if (column.Visible == true)
{
column.IsSelected =
(i >= startIndex && i <= endIndex);
}
}
}
}
