/// <summary>
/// This method is inherited from the IComparer interface. It compares the two objects passed using a case insensitive comparison.
/// </summary>
/// <param name="x">First object to be compared</param>
/// <param name="y">Second object to be compared</param>
/// <returns>The result of the comparison. "0" if equal, negative if 'x' is less than 'y' and positive if 'x' is greater than 'y'</returns>
public int Compare(object x, object y)
{
// Cast the objects to be compared to ListViewItem objects
var itemX = x is ListViewItem ? ((ListViewItem)x).SubItems[SortColumn].Text : x.ToString();
var itemY = y is ListViewItem ? ((ListViewItem)y).SubItems[SortColumn].Text : y.ToString();
// Compare the two items
int compareResult = comparer.Compare(itemX, itemY);
// Calculate correct return value based on object comparison
if (Order == SortOrder.Ascending)
{
// Ascending sort is selected, return normal result of compare operation
return(compareResult);
}
else if (Order == SortOrder.Descending)
{
// Descending sort is selected, return negative result of compare operation
return(-compareResult);
}
else
{
// Return '0' to indicate they are equal
return(0);
}
}
/// <summary>
/// This method is inherited from the IComparer interface. It compares the two objects passed using a case insensitive comparison.
/// </summary>
/// <param name="x">First object to be compared</param>
/// <param name="y">Second object to be compared</param>
/// <returns>The result of the comparison. "0" if equal, negative if 'x' is less than 'y' and positive if 'x' is greater than 'y'</returns>
public int Compare(Chart x, Chart y)
{
// Cast the objects to be compared to ListViewItem objects
string itemX = string.Empty, itemY = string.Empty;
switch (SortType)
{
case ChartSortType.Title:
itemX = x.Title;
itemY = y.Title;
break;
case ChartSortType.Artist:
itemX = x.Title;
itemY = y.Title;
break;
case ChartSortType.Pattern:
itemX = x.Pattern;
itemY = y.Pattern;
break;
default: break;
}
// Compare the two items
int compareResult = comparer.Compare(itemX, itemY);
// Calculate correct return value based on object comparison
if (Order == SortOrder.Ascending)
{
// Ascending sort is selected, return normal result of compare operation
return(compareResult);
}
else if (Order == SortOrder.Descending)
{
// Descending sort is selected, return negative result of compare operation
return(-compareResult);
}
else
{
// Return '0' to indicate they are equal
return(0);
}
}
