protected override IList <OLVGroup> MakeGroups(GroupingParameters parms)
{
if (this.GroupingStrategy == null)
{
return(new List <OLVGroup>());
}
return(this.GroupingStrategy.GetGroups(parms));
}
/// <summary>
/// Make a list of groups that should be shown according to the given parameters
/// </summary>
/// <param name="parms"></param>
/// <returns>The list of groups to be created</returns>
/// <remarks>This should not change the state of the control. It is possible that the
/// groups created will not be used. They may simply be discarded.</remarks>
protected virtual IList<OLVGroup> MakeGroups(GroupingParameters parms)
{
// There is a lot of overlap between this method and FastListGroupingStrategy.MakeGroups()
// Any changes made here may need to be reflected there
// Separate the list view items into groups, using the group key as the descrimanent
NullableDictionary<object, List<OLVListItem>> map = new NullableDictionary<object, List<OLVListItem>>();
foreach (OLVListItem olvi in parms.ListView.Items) {
object key = parms.GroupByColumn.GetGroupKey(olvi.RowObject);
if (!map.ContainsKey(key))
map[key] = new List<OLVListItem>();
map[key].Add(olvi);
}
// Sort the items within each group (unless specifically turned off)
OLVColumn primarySortColumn = parms.SortItemsByPrimaryColumn ? parms.ListView.GetColumn(0) : parms.PrimarySort;
if (primarySortColumn != null && parms.PrimarySortOrder != SortOrder.None) {
ColumnComparer itemSorter = new ColumnComparer(primarySortColumn, parms.PrimarySortOrder,
parms.SecondarySort, parms.SecondarySortOrder);
foreach (object key in map.Keys) {
map[key].Sort(parms.ItemComparer ?? itemSorter);
}
}
// Make a list of the required groups
List<OLVGroup> groups = new List<OLVGroup>();
foreach (object key in map.Keys) {
string title = parms.GroupByColumn.ConvertGroupKeyToTitle(key);
if (!String.IsNullOrEmpty(parms.TitleFormat)) {
int count = map[key].Count;
string format = (count == 1 ? parms.TitleSingularFormat : parms.TitleFormat);
try {
title = String.Format(format, title, count);
} catch (FormatException) {
title = "Invalid group format: " + format;
}
}
OLVGroup lvg = new OLVGroup(title);
lvg.Collapsible = this.HasCollapsibleGroups;
lvg.Key = key;
lvg.SortValue = key as IComparable;
lvg.Items = map[key];
if (parms.GroupByColumn.GroupFormatter != null)
parms.GroupByColumn.GroupFormatter(lvg, parms);
groups.Add(lvg);
}
// Sort the groups
if (parms.GroupByOrder != SortOrder.None)
groups.Sort(parms.GroupComparer ?? new OLVGroupComparer(parms.GroupByOrder));
return groups;
}
/// <summary>
/// Collect and return all the variables that influence the creation of groups
/// </summary>
/// <returns></returns>
protected virtual GroupingParameters CollectGroupingParameters(OLVColumn groupByColumn, SortOrder groupByOrder,
OLVColumn column, SortOrder order, OLVColumn secondaryColumn, SortOrder secondaryOrder)
{
string titleFormat = this.ShowItemCountOnGroups ? groupByColumn.GroupWithItemCountFormatOrDefault : null;
string titleSingularFormat = this.ShowItemCountOnGroups ? groupByColumn.GroupWithItemCountSingularFormatOrDefault : null;
GroupingParameters parms = new GroupingParameters(this, groupByColumn, groupByOrder,
column, order, secondaryColumn, secondaryOrder,
titleFormat, titleSingularFormat, this.SortGroupItemsByPrimaryColumn);
return parms;
}
/// <summary>
/// Create a CreateGroupsEventArgs
/// </summary>
/// <param name="parms"></param>
public CreateGroupsEventArgs(GroupingParameters parms) {
this.parameters = parms;
}
/// <summary>
/// Make a list of groups that should be shown according to the given parameters
/// </summary>
/// <param name="parms"></param>
/// <returns></returns>
protected override IList<OLVGroup> MakeGroups(GroupingParameters parms) {
if (this.GroupingStrategy == null)
return new List<OLVGroup>();
else
return this.GroupingStrategy.GetGroups(parms);
}
public CreateGroupsEventArgs(GroupingParameters parms)
{
this.parameters = parms;
}
/// <summary>
/// Return the list of groups that should be shown according to the given parameters
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public virtual IList<OLVGroup> GetGroups(GroupingParameters parameters) {
return new List<OLVGroup>();
}
/// <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>
/// Collect and return all the variables that influence the creation of groups
/// </summary>
/// <returns></returns>
protected virtual GroupingParameters CollectGroupingParameters(OLVColumn groupByColumn, SortOrder groupByOrder,
OLVColumn sortByColumn, SortOrder sortByOrder, OLVColumn secondaryColumn, SortOrder secondaryOrder)
{
// If the user tries to group by a non-groupable column, keep the current group by
// settings, but use the non-groupable column for sorting
if (!groupByColumn.Groupable && lastGroupingParameters != null) {
sortByColumn = groupByColumn;
sortByOrder = groupByOrder;
groupByColumn = lastGroupingParameters.GroupByColumn;
groupByOrder = lastGroupingParameters.GroupByOrder;
}
string titleFormat = this.ShowItemCountOnGroups ? groupByColumn.GroupWithItemCountFormatOrDefault : null;
string titleSingularFormat = this.ShowItemCountOnGroups ? groupByColumn.GroupWithItemCountSingularFormatOrDefault : null;
GroupingParameters parms = new GroupingParameters(this, groupByColumn, groupByOrder,
sortByColumn, sortByOrder, secondaryColumn, secondaryOrder,
titleFormat, titleSingularFormat, this.SortGroupItemsByPrimaryColumn);
return parms;
}
/// <summary>
/// Organise the view items into groups, based on the given columns
/// </summary>
/// <param name="groupByColumn">What column will be used for grouping</param>
/// <param name="groupByOrder">What ordering will be used for groups</param>
/// <param name="column">The column whose values should be used for sorting. Cannot be null</param>
/// <param name="order">The order in which the values from column will be sorted</param>
/// <param name="secondaryColumn">When the values from 'column' are equal, use the values provided by this column</param>
/// <param name="secondaryOrder">How will the secondary values be sorted</param>
/// <remarks>This method does not trigger sorting events. Use BuildGroups() to do that</remarks>
public virtual void BuildGroups(OLVColumn groupByColumn, SortOrder groupByOrder,
OLVColumn column, SortOrder order, OLVColumn secondaryColumn, SortOrder secondaryOrder)
{
// Sanity checks
if (groupByColumn == null)
return;
// Getting the Count forces any internal cache of the ListView to be flushed. Without
// this, iterating over the Items will not work correctly if the ListView handle
// has not yet been created.
#pragma warning disable 168
// ReSharper disable once UnusedVariable
int dummy = this.Items.Count;
#pragma warning restore 168
// Collect all the information that governs the creation of groups
GroupingParameters parms = this.CollectGroupingParameters(groupByColumn, groupByOrder,
column, order, secondaryColumn, secondaryOrder);
// Trigger an event to let the world create groups if they want
CreateGroupsEventArgs args = new CreateGroupsEventArgs(parms);
if (parms.GroupByColumn != null)
args.Canceled = !parms.GroupByColumn.Groupable;
this.OnBeforeCreatingGroups(args);
if (args.Canceled)
return;
// If the event didn't create them for us, use our default strategy
if (args.Groups == null)
args.Groups = this.MakeGroups(parms);
// Give the world a chance to munge the groups before they are created
this.OnAboutToCreateGroups(args);
if (args.Canceled)
return;
// Create the groups now
this.OLVGroups = args.Groups;
this.CreateGroups(args.Groups);
// Tell the world that new groups have been created
this.OnAfterCreatingGroups(args);
lastGroupingParameters = args.Parameters;
}
public override IList <OLVGroup> GetGroups(GroupingParameters parms)
{
Converter <object, int> converter = null;
FastObjectListView folv = (FastObjectListView)parms.ListView;
int capacity = 0;
NullableDictionary <object, List <object> > dictionary = new NullableDictionary <object, List <object> >();
foreach (object obj2 in folv.Objects)
{
object groupKey = parms.GroupByColumn.GetGroupKey(obj2);
if (!dictionary.ContainsKey(groupKey))
{
dictionary[groupKey] = new List <object>();
}
dictionary[groupKey].Add(obj2);
capacity++;
}
OLVColumn col = parms.SortItemsByPrimaryColumn ? parms.ListView.GetColumn(0) : parms.PrimarySort;
ModelObjectComparer comparer = new ModelObjectComparer(col, parms.PrimarySortOrder, parms.SecondarySort, parms.SecondarySortOrder);
foreach (object obj3 in dictionary.Keys)
{
dictionary[obj3].Sort(comparer);
}
List <OLVGroup> list = new List <OLVGroup>();
foreach (object obj3 in dictionary.Keys)
{
string str = parms.GroupByColumn.ConvertGroupKeyToTitle(obj3);
if (!string.IsNullOrEmpty(parms.TitleFormat))
{
int count = dictionary[obj3].Count;
str = string.Format((count == 1) ? parms.TitleSingularFormat : parms.TitleFormat, str, count);
}
OLVGroup group = new OLVGroup(str)
{
Key = obj3,
SortValue = obj3 as IComparable
};
if (converter == null)
{
converter = x => folv.IndexOf(x);
}
group.Contents = dictionary[obj3].ConvertAll <int>(converter);
group.VirtualItemCount = dictionary[obj3].Count;
if (parms.GroupByColumn.GroupFormatter != null)
{
parms.GroupByColumn.GroupFormatter(group, parms);
}
list.Add(group);
}
list.Sort(new OLVGroupComparer(parms.PrimarySortOrder));
this.indexToGroupMap = new List <int>(capacity);
this.indexToGroupMap.AddRange(new int[capacity]);
for (int i = 0; i < list.Count; i++)
{
OLVGroup group2 = list[i];
List <int> contents = (List <int>)group2.Contents;
foreach (int num4 in contents)
{
this.indexToGroupMap[num4] = i;
}
}
return(list);
}
/// <summary>
/// Return the list of groups that should be shown according to the given parameters
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public virtual IList <OLVGroup> GetGroups(GroupingParameters parameters)
{
return(new List <OLVGroup>());
}
/// <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);
}
public override IList <OLVGroup> GetGroups(GroupingParameters parms)
{
// This strategy can only be used on FastObjectListViews
FastObjectListView folv = (FastObjectListView)parms.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.Objects)
{
object key = parms.GroupByColumn.GetGroupKey(model);
if (!map.ContainsKey(key))
{
map[key] = new List <object>();
}
map[key].Add(model);
objectCount++;
}
// Sort the items within each group
OLVColumn primarySortColumn = parms.SortItemsByPrimaryColumn ? parms.ListView.GetColumn(0) : parms.PrimarySort;
ModelObjectComparer sorter = new ModelObjectComparer(primarySortColumn, parms.PrimarySortOrder,
parms.SecondarySort, parms.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 = parms.GroupByColumn.ConvertGroupKeyToTitle(key);
if (!String.IsNullOrEmpty(parms.TitleFormat))
{
int count = map[key].Count;
title = String.Format((count == 1 ? parms.TitleSingularFormat : parms.TitleFormat), title, count);
}
OLVGroup lvg = new OLVGroup(title);
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 (parms.GroupByColumn.GroupFormatter != null)
{
parms.GroupByColumn.GroupFormatter(lvg, parms);
}
groups.Add(lvg);
}
// Sort the groups
groups.Sort(new OLVGroupComparer(parms.PrimarySortOrder));
// 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);
}
