public OrderableComparer(OLVColumn primarySortColumn, SortOrder primarySortOrder)
{
if (primarySortColumn != null)
{
_modelComparer = new ModelObjectComparer(primarySortColumn, primarySortOrder);
}
}
/// <summary>
///
/// </summary>
/// <param name="column"></param>
/// <param name="sortOrder"></param>
public override void Sort(OLVColumn column, SortOrder sortOrder)
{
if (sortOrder != SortOrder.None)
{
ModelObjectComparer comparer = new ModelObjectComparer(column, sortOrder, this.listView.SecondarySortColumn, this.listView.SecondarySortOrder);
this.fullObjectList.Sort(comparer);
this.filteredObjectList.Sort(comparer);
}
this.RebuildIndexMap();
}
/// <summary>
/// Create groups for FastListView
/// </summary>
/// <param name="parmameters"></param>
/// <returns></returns>
public override IList<OLVGroup> GetGroups(GroupingParameters parmameters) {
// There is a lot of overlap between this method and ObjectListView.MakeGroups()
// Any changes made here may need to be reflected there
// This strategy can only be used on FastObjectListViews
FastObjectListView folv = (FastObjectListView)parmameters.ListView;
// Separate the list view items into groups, using the group key as the descrimanent
int objectCount = 0;
NullableDictionary<object, List<object>> map = new NullableDictionary<object, List<object>>();
foreach (object model in folv.FilteredObjects) {
object key = parmameters.GroupByColumn.GetGroupKey(model);
if (!map.ContainsKey(key))
map[key] = new List<object>();
map[key].Add(model);
objectCount++;
}
// Sort the items within each group
// TODO: Give parameters a ModelComparer property
OLVColumn primarySortColumn = parmameters.SortItemsByPrimaryColumn ? parmameters.ListView.GetColumn(0) : parmameters.PrimarySort;
ModelObjectComparer sorter = new ModelObjectComparer(primarySortColumn, parmameters.PrimarySortOrder,
parmameters.SecondarySort, parmameters.SecondarySortOrder);
foreach (object key in map.Keys) {
map[key].Sort(sorter);
}
// Make a list of the required groups
List<OLVGroup> groups = new List<OLVGroup>();
foreach (object key in map.Keys) {
string title = parmameters.GroupByColumn.ConvertGroupKeyToTitle(key);
if (!String.IsNullOrEmpty(parmameters.TitleFormat)) {
int count = map[key].Count;
string format = (count == 1 ? parmameters.TitleSingularFormat : parmameters.TitleFormat);
try {
title = String.Format(format, title, count);
} catch (FormatException) {
title = "Invalid group format: " + format;
}
}
OLVGroup lvg = new OLVGroup(title);
lvg.Collapsible = folv.HasCollapsibleGroups;
lvg.Key = key;
lvg.SortValue = key as IComparable;
lvg.Contents = map[key].ConvertAll<int>(delegate(object x) { return folv.IndexOf(x); });
lvg.VirtualItemCount = map[key].Count;
if (parmameters.GroupByColumn.GroupFormatter != null)
parmameters.GroupByColumn.GroupFormatter(lvg, parmameters);
groups.Add(lvg);
}
// Sort the groups
if (parmameters.GroupByOrder != SortOrder.None)
groups.Sort(parmameters.GroupComparer ?? new OLVGroupComparer(parmameters.GroupByOrder));
// Build an array that remembers which group each item belongs to.
this.indexToGroupMap = new List<int>(objectCount);
this.indexToGroupMap.AddRange(new int[objectCount]);
for (int i = 0; i < groups.Count; i++) {
OLVGroup group = groups[i];
List<int> members = (List<int>)group.Contents;
foreach (int j in members)
this.indexToGroupMap[j] = i;
}
return groups;
}
/// <summary>
///
/// </summary>
/// <param name="column"></param>
/// <param name="sortOrder"></param>
public override void Sort(OLVColumn column, SortOrder sortOrder) {
if (sortOrder != SortOrder.None) {
ModelObjectComparer comparer = new ModelObjectComparer(column, sortOrder, this.listView.SecondarySortColumn, this.listView.SecondarySortOrder);
this.fullObjectList.Sort(comparer);
this.filteredObjectList.Sort(comparer);
}
this.RebuildIndexMap();
}
