void ListView1_ButtonPressed(object sender, ButtonEventArgs e)
{
if (Toolkit.CurrentEngine.Type != ToolkitType.Wpf)
{
int columnHeight = (int)listView1.GetCellBounds(0, listView1.Columns[0].Views[0], false).Height;
int row = listView1.GetRowAtPosition(e.X, e.Y - columnHeight);
if (row == -1)
listView1.UnselectAll();
}
}