/// ------------------------------------------------------------------------------------
/// <summary>
/// Occurs when the DataGridView compares two cell values to perform a sort operation.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Windows.Forms.DataGridViewSortCompareEventArgs"/>
/// instance containing the event data.</param>
/// ------------------------------------------------------------------------------------
private void OnSortCompare(object sender, DataGridViewSortCompareEventArgs e)
{
if (e.CellValue1 is ITsString && e.CellValue2 is ITsString)
{
if (m_cache != null)
{
Debug.Assert(GetIcuLocale(e.RowIndex1) == GetIcuLocale(e.RowIndex2));
string icuLocale = GetIcuLocale(e.RowIndex1);
if (icuLocale != null)
{
if (icuLocale != m_lastIcuLocale)
{
CollatingEngine.Close();
CollatingEngine.Open(icuLocale);
m_lastIcuLocale = icuLocale;
}
e.SortResult = CollatingEngine.Compare(((ITsString)e.CellValue1).Text,
((ITsString)e.CellValue2).Text, LgCollatingOptions.fcoDefault);
e.Handled = true;
return;
}
}
e.SortResult = ((ITsString)e.CellValue1).Text.CompareTo(
((ITsString)e.CellValue2).Text);
e.Handled = true;
return;
}
e.Handled = false;
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Compares two objects and returns a value indicating whether one is less than, equal
/// to, or greater than the other.
/// </summary>
/// <param name="x">The first object to compare.</param>
/// <param name="y">The second object to compare.</param>
/// <returns>
/// Value Condition
/// Less than zero = x is less than y.
/// Zero = x equals y.
/// Greater than zero = x is greater than y.
/// </returns>
/// <exception cref="T:System.ArgumentException">Neither x nor y implements the
/// <see cref="T:System.IComparable"/> interface.-or- x and y are of different types and
/// neither one can handle comparisons with the other. </exception>
/// ------------------------------------------------------------------------------------
public int Compare(object x, object y)
{
if ((!(x is ITsString || x is string) || !(y is ITsString || y is string)) &&
x != null && y != null)
{
throw new ArgumentException();
}
string xString = (x is ITsString) ? ((ITsString)x).Text : x as string;
string yString = (y is ITsString) ? ((ITsString)y).Text : y as string;
if (xString == string.Empty)
{
xString = null;
}
if (yString == string.Empty)
{
yString = null;
}
if (xString == null && yString == null)
{
return(0);
}
if (xString == null)
{
return(-1);
}
if (yString == null)
{
return(1);
}
int ret;
if (CollatingEngine != null)
{
ret = CollatingEngine.Compare(xString, yString, LgCollatingOptions.fcoDefault);
}
else
{
ret = xString.CompareTo(yString);
}
return(ret);
}
