/// <summary>Removes a filter item from the list of this class.</summary>
/// <param name="column">The column to be checked for removing the filter item.</param>
/// <param name="filterItem">The filter item to be removed.</param>
private void Remove(int column, FilterItem filterItem)
{
// This would remove a FilterItem from the Filter list when the filter is cleared.
// Used Iterator for removing instead of canonical loop to prevent ConcurrentModificationException.
int index = -1;
for (int i = 0; i < filterItems.Count; ++i)
{
FilterItem item = filterItems[i];
if (column == -1 && item.GetFilterType().Equals(filterItem.GetFilterType()))
{
index = i;
break;
}
else if (item.GetColumn() == filterItem.GetColumn())
{
index = i;
break;
}
}
if (index != -1)
{
filterItems.RemoveAt(index);
}
tableView.Filter(this);
}
/// <summary>Updates a filter item from the list of this class.</summary>
/// <param name="column">The column in which filter item will be updated.</param>
/// <param name="filterItem">The updated filter item.</param>
private void Update(int column, FilterItem filterItem)
{
// This would update an existing FilterItem from the Filter list.
// Used Iterator for updating instead of canonical loop to prevent ConcurrentModificationException.
int index = -1;
for (int i = 0; i < filterItems.Count; ++i)
{
FilterItem item = filterItems[i];
if (column == -1 && item.GetFilterType().Equals(filterItem.GetFilterType()))
{
index = i;
break;
}
else if (item.GetColumn() == filterItem.GetColumn())
{
index = i;
break;
}
}
if (index != -1)
{
filterItems[index] = filterItem;
}
tableView.Filter(this);
}
/// <summary>Method to check if a filter item is already added based on the column to be filtered.
/// </summary>
/// <param name="column">The column to be checked if the list is already filtering.</param>
/// <param name="filterItem">The filter item to be checked.</param>
/// <returns>True if a filter item for a specific column or for ALL is already in the list.
/// </returns>
private bool IsAlreadyFiltering(int column, FilterItem filterItem)
{
// This would determine if Filter is already filtering ALL or a specified COLUMN.
foreach (FilterItem item in filterItems)
{
if (column == -1 && item.GetFilterType().Equals(filterItem.GetFilterType()))
{
return(true);
}
else
{
if (item.GetColumn() == filterItem.GetColumn())
{
return(true);
}
}
}
return(false);
}
