internal int GetFirstRawItemGlobalSortedIndex()
{
int index = 0;
DataGridCollectionViewGroup group = this;
DataGridCollectionViewGroup parent = group;
if (parent != null)
{
parent = parent.Parent;
}
while (parent != null)
{
ReadOnlyObservableCollection <object> subGroups = parent.Items;
int subGroupCount = subGroups.Count;
DataGridCollectionViewGroup currentGroup = null;
for (int i = 0; i < subGroupCount; i++)
{
currentGroup = subGroups[i] as DataGridCollectionViewGroup;
if (currentGroup == group)
{
break;
}
index += currentGroup.GlobalRawItemCount;
}
group = parent;
parent = parent.Parent;
}
return(index);
}
internal RawItem GetRawItemAtGlobalSortedIndex(int index)
{
if (this.IsBottomLevel)
{
return(m_sortedRawItems[index]);
}
else
{
int count = this.ItemCount;
for (int i = 0; i < count; i++)
{
DataGridCollectionViewGroup subGroups = this.ProtectedItems[i] as DataGridCollectionViewGroup;
if (subGroups == null)
{
throw new InvalidOperationException("Sub-groups cannot be null (Nothing in Visual Basic).");
}
int subGroupCount = subGroups.GlobalRawItemCount;
if (index < subGroupCount)
{
return(subGroups.GetRawItemAtGlobalSortedIndex(index));
}
index -= subGroupCount;
}
}
throw new ArgumentOutOfRangeException("index");
}
internal RawItem GetRawItemAtGlobalSortedIndex(int index)
{
if (this.IsBottomLevel)
{
return(m_sortedRawItems[index]);
}
else
{
foreach (object value in this.ProtectedItems)
{
DataGridCollectionViewGroup subGroup = value as DataGridCollectionViewGroup;
int subGroupCount = subGroup.GlobalRawItemCount;
if (index < subGroupCount)
{
return(subGroup.GetRawItemAtGlobalSortedIndex(index));
}
index -= subGroupCount;
}
}
throw new ArgumentOutOfRangeException("index");
}
protected DataGridCollectionViewGroup(DataGridCollectionViewGroup template, DataGridCollectionViewGroup parent)
: this(template.Name, parent, template.m_unsortedIndex, template.m_sortedRawItems.Count, template.m_subGroups.Count)
{
m_nextSubGroupUnsortedIndex = template.m_nextSubGroupUnsortedIndex;
m_subGroupBy = template.m_subGroupBy;
m_groupByName = template.GroupByName;
}
internal virtual void InsertRawItem(int index, RawItem rawItem)
{
Debug.Assert(this.IsBottomLevel);
if (m_sortedRawItems == null)
{
m_sortedRawItems = new List <RawItem>(4);
}
m_globalRawItemCount++;
DataGridCollectionViewGroup parent = m_parent;
while (parent != null)
{
parent.m_globalRawItemCount++;
parent = parent.m_parent;
}
int count = m_sortedRawItems.Count;
for (int i = index; i < count; i++)
{
m_sortedRawItems[i].SetSortedIndex(i + 1);
}
m_sortedRawItems.Insert(index, rawItem);
rawItem.SetParentGroup(this);
rawItem.SetSortedIndex(index);
this.ProtectedItemCount++;
this.ProtectedItems.Insert(index, rawItem.DataItem);
}
internal bool Contains(object item)
{
var group = item as DataGridCollectionViewGroup;
if (group != null)
{
//Must make sure the group the group is ref equals, because there can be groups with a null name at more than one level.
DataGridCollectionViewGroup foundGroup;
if (m_subGroups.TryGetValue(DataGridCollectionViewGroup.GetHashKeyFromName(group.Name), out foundGroup))
{
return(foundGroup == group);
}
return(false);
}
DataGridCollectionView collectionView = this.GetCollectionView();
if (collectionView != null)
{
RawItem rawItem = collectionView.GetFirstRawItemFromDataItem(item);
if (rawItem != null)
{
return(rawItem.ParentGroup == this);
}
}
return(false);
}
private void RemoveGroup(DataGridCollectionViewGroup group)
{
if (group == null)
{
throw new ArgumentNullException("group");
}
Debug.Assert(this == group.m_parent);
// We do not remove group forced in SubGroupBy.GroupNames
if (group.UnsortedIndex < this.SubGroupBy.GroupNames.Count)
{
return;
}
Debug.Assert(!this.IsBottomLevel);
Debug.Assert((group.m_globalRawItemCount == 0) && (group.ProtectedItemCount == 0));
this.ProtectedItemCount--;
m_groupsDictionary.Remove(DataGridCollectionViewGroup.GetHashKeyFromName(group.Name));
this.ProtectedItems.Remove(group);
if ((this.ProtectedItemCount == 0) && (m_parent != null))
{
m_parent.RemoveGroup(this);
}
}
public override int Compare(int xDataIndex, int yDataIndex)
{
DataGridCollectionViewGroup xGroup = m_groups[xDataIndex] as DataGridCollectionViewGroup;
DataGridCollectionViewGroup yGroup = m_groups[yDataIndex] as DataGridCollectionViewGroup;
return(m_groupSortedComparer.Compare(xGroup, yGroup));
}
internal int GetFirstRawItemGlobalSortedIndex()
{
int index = 0;
DataGridCollectionViewGroup group = this;
DataGridCollectionViewGroup parent = this.Parent;
DataGridCollectionViewGroup currentGroup = null;
while (parent != null)
{
foreach (object value in parent.ProtectedItems)
{
if (value == group)
{
break;
}
currentGroup = value as DataGridCollectionViewGroup;
index += currentGroup.GlobalRawItemCount;
}
group = parent;
parent = parent.Parent;
}
return(index);
}
private void InsertGroup(int index, DataGridCollectionViewGroup group)
{
Debug.Assert(!this.IsBottomLevel);
m_groupsDictionary.Add(DataGridCollectionViewGroup.GetHashKeyFromName(group.Name), group);
this.ProtectedItemCount++;
this.ProtectedItems.Insert(index, group);
}
internal int BinarySearchGroup(DataGridCollectionViewGroup value, IComparer <DataGridCollectionViewGroup> comparer)
{
if (comparer == null)
{
throw new ArgumentNullException("comparer");
}
ObservableCollection <object> items = this.ProtectedItems;
Debug.Assert(items.Count == this.ItemCount);
int low = 0;
int hi = (items.Count) - 1;
while (low <= hi)
{
int compareResult;
int median = (low + ((hi - low) >> 1));
DataGridCollectionViewGroup medianGroup = items[median] as DataGridCollectionViewGroup;
// We exclude ourself from the research because we seek for a new valid position
if (medianGroup == value)
{
if (low == hi)
{
return(low);
}
median++;
medianGroup = items[median] as DataGridCollectionViewGroup;
}
try
{
compareResult = comparer.Compare(medianGroup, value);
}
catch (Exception exception)
{
throw new InvalidOperationException("IComparer has failed to compare the values.", exception);
}
if (compareResult == 0)
{
return(median);
}
if (compareResult < 0)
{
low = median + 1;
}
else
{
hi = median - 1;
}
}
return(~low);
}
public DataGridCollectionViewGroupSort( int[] dataIndexArray, GroupSortComparer groupSortedComparer, DataGridCollectionViewGroup[] protectedItems )
: base( dataIndexArray )
{
if( groupSortedComparer == null )
throw new ArgumentNullException( "groupSortedComparer" );
m_groupSortedComparer = groupSortedComparer;
m_groups = protectedItems;
}
public OptimizedReadOnlyObservableCollection(DataGridCollectionViewGroup dataGridCollectionViewGroup)
: base(dataGridCollectionViewGroup.ProtectedItems)
{
if (dataGridCollectionViewGroup == null)
{
throw new ArgumentNullException("dataGridCollectionViewGroup");
}
m_dataGridCollectionViewGroup = dataGridCollectionViewGroup;
}
private DataGridCollectionViewGroup(object name, DataGridCollectionViewGroup parent, int unsortedIndex, int rawCapacity, int groupCapacity)
: base(name)
{
m_parent = parent;
m_unsortedIndex = unsortedIndex;
m_protectedItems = ObservableCollectionHelper.GetItems(base.ProtectedItems);
m_protectedItemsCollectionChanged = ObservableCollectionHelper.GetCollectionChanged(base.ProtectedItems);
m_optimizedItems = new OptimizedReadOnlyObservableCollection(this);
m_subGroups = new Dictionary <object, DataGridCollectionViewGroup>(groupCapacity);
m_sortedRawItems = new List <RawItem>(rawCapacity);
}
private int BinarySearchGroup(DataGridCollectionViewGroup value, IComparer <DataGridCollectionViewGroup> comparer)
{
if (comparer == null)
{
throw new ArgumentNullException("comparer");
}
int low = 0;
int hi = (this.ProtectedItemCount) - 1;
int median;
int compareResult;
while (low <= hi)
{
median = (low + ((hi - low) >> 1));
DataGridCollectionViewGroup medianGroup = this.ProtectedItems[median] as DataGridCollectionViewGroup;
if (medianGroup == value)
{
if (low == hi)
{
return(low);
}
return(median);
}
try
{
compareResult = comparer.Compare(medianGroup, value);
}
catch (Exception exception)
{
throw new InvalidOperationException("IComparer has failed to compare the values.", exception);
}
if (compareResult == 0)
{
return(median);
}
if (compareResult < 0)
{
low = median + 1;
}
else
{
hi = median - 1;
}
}
return(~low);
}
internal DataGridCollectionViewGroup(
DataGridCollectionViewGroup template,
DataGridCollectionViewGroup parent )
: this( template.Name, parent, template.m_unsortedIndex )
{
m_nextSubGroupUnsortedIndex = template.m_nextSubGroupUnsortedIndex;
m_subGroupBy = template.m_subGroupBy;
if( template.m_groupsDictionary != null )
m_groupsDictionary = new Hashtable();
if( template.m_sortedRawItems != null )
m_sortedRawItems = new List<RawItem>( template.m_sortedRawItems.Count );
}
private DataGridCollectionViewGroup MoveToFirstLeafGroup(DataGridCollectionViewGroup referenceGroup, int index)
{
while (!referenceGroup.IsBottomLevel)
{
referenceGroup = referenceGroup.Items[index] as DataGridCollectionViewGroup;
m_currentGroupIndex.Push(index);
if (index != 0)
{
index = 0;
}
}
return(referenceGroup);
}
internal DataGridCollectionViewGroup GetGroup(
RawItem rawItem,
int level,
CultureInfo culture,
ObservableCollection <GroupDescription> groupByList,
GroupSortComparer[] groupSortComparers)
{
// If sortComparers is null, we are in massive group creation, no order check.
if (this.IsBottomLevel)
{
throw new InvalidOperationException("An attempt was made to get a group for which a GroupDescription has not been provided.");
}
object groupName = m_subGroupBy.GroupNameFromItem(rawItem.DataItem, level, culture);
DataGridGroupDescription dataGridGroupDescription = m_subGroupBy as DataGridGroupDescription;
DataGridCollectionViewGroup group;
if (dataGridGroupDescription != null)
{
group = m_groupsDictionary[DataGridCollectionViewGroup.GetHashKeyFromName(groupName)]
as DataGridCollectionViewGroup;
}
else
{
int itemCount = this.ItemCount;
group = null;
for (int i = 0; i < itemCount; i++)
{
DataGridCollectionViewGroup tempGroup = this.ProtectedItems[i] as DataGridCollectionViewGroup;
if (m_subGroupBy.NamesMatch(tempGroup.Name, groupName))
{
group = tempGroup;
break;
}
}
}
if (group == null)
{
group = this.CreateSubGroup(
groupName, level, groupByList, groupSortComparers);
}
return(group);
}
private DataGridCollectionViewGroup CreateSubGroup(object groupName, int level, ObservableCollection <GroupDescription> groupByList,
List <GroupSortComparer> groupSortComparers)
{
// If sortComparers is null, we are in massive group creation, no order check.
var group = new DataGridCollectionViewGroup(groupName, this, m_nextSubGroupUnsortedIndex);
var dataGridGroupDescription = groupByList[level] as DataGridGroupDescription;
if (dataGridGroupDescription != null)
{
group.GroupByName = dataGridGroupDescription.PropertyName;
}
unchecked
{
m_nextSubGroupUnsortedIndex++;
}
int index;
if (groupSortComparers == null)
{
Debug.Assert(this.ProtectedItemCount == this.ProtectedItems.Count);
index = this.ProtectedItemCount;
}
else
{
index = this.BinarySearchGroup(group, groupSortComparers[level]);
if (index < 0)
{
index = ~index;
}
}
level++;
if (level < groupByList.Count)
{
group.SetSubGroupBy(groupByList[level]);
group.CreateFixedGroupNames(level, groupByList, groupSortComparers);
}
this.InsertGroup(index, group);
return(group);
}
internal DataGridCollectionViewGroup(
DataGridCollectionViewGroup template,
DataGridCollectionViewGroup parent)
: this(template.Name, parent, template.m_unsortedIndex)
{
m_nextSubGroupUnsortedIndex = template.m_nextSubGroupUnsortedIndex;
m_subGroupBy = template.m_subGroupBy;
if (template.m_groupsDictionary != null)
{
m_groupsDictionary = new Hashtable();
}
if (template.m_sortedRawItems != null)
{
m_sortedRawItems = new List <RawItem>(template.m_sortedRawItems.Count);
}
}
public DataGridCollectionViewGroupSort(
int[] dataIndexArray,
GroupSortComparer groupSortedComparer,
DataGridCollectionViewGroup parentGroup)
: base(dataIndexArray)
{
if (parentGroup == null)
{
throw new ArgumentNullException("parentGroup");
}
if (groupSortedComparer == null)
{
throw new ArgumentNullException("groupSortedComparer");
}
m_groupSortedComparer = groupSortedComparer;
m_groups = parentGroup.ProtectedItems;
}
internal DataGridCollectionViewGroup GetGroup(
RawItem rawItem,
int level,
CultureInfo culture,
ObservableCollection <GroupDescription> groupByList,
List <GroupSortComparer> groupSortComparers)
{
// If sortComparers is null, we are in massive group creation, no order check.
if (this.IsBottomLevel)
{
throw new InvalidOperationException("An attempt was made to get a group for which a GroupDescription has not been provided.");
}
object groupName = m_subGroupBy.GroupNameFromItem(rawItem.DataItem, level, culture);
DataGridCollectionViewGroup group;
if ((m_subGroupBy is DataGridGroupDescription) || (m_subGroupBy is PropertyGroupDescription))
{
m_subGroups.TryGetValue(DataGridCollectionViewGroup.GetHashKeyFromName(groupName), out group);
}
else
{
//If dealing with an unknown GroupDescription type, use the standard method to retrieve a group, in case group retrival is handle differently.
group = null;
foreach (var tempGroup in m_subGroups.Values)
{
if (m_subGroupBy.NamesMatch(tempGroup.Name, groupName))
{
group = tempGroup;
break;
}
}
}
if (group == null)
{
group = this.CreateSubGroup(groupName, level, groupByList, groupSortComparers);
}
return(group);
}
public void InvalidateGroupStats(DataGridCollectionViewGroup group, bool calculateAllStats = false, bool resortGroups = true)
{
if (group == null)
{
return;
}
lock (this)
{
if (this.RefreshPending)
{
return;
}
// When set to false, this will prevent group resorting when the DataGridCollectionView.ProcessInvalidatedGroupStats() is called through the disptached call below.
// If the current method is called again and this variable is set to true before groups are processed, it will be fine, as the grid is now in a state that will support group resorting.
m_resortGroups = resortGroups;
var parent = group;
while (parent != null)
{
if (!m_invalidatedGroups.Contains(parent))
{
m_invalidatedGroups.Add(parent);
}
parent = parent.Parent;
}
if (m_dispatcher != null)
{
if (m_dispatcherOperation == null)
{
m_dispatcherOperation = m_dispatcher.BeginInvoke(DispatcherPriority.DataBind, new DispatcherOperationCallback(this.Dispatched_Process), null);
m_dispatcherOperationStartTime = DateTime.UtcNow;
}
else
{
m_hasNewOperationsSinceStartTime = true;
}
}
}
}
public void InvalidateGroupStats(DataGridCollectionViewGroup group, bool calculateAllStats = false)
{
if (group == null)
{
return;
}
lock (this)
{
if (this.RefreshPending)
{
return;
}
DataGridCollectionViewGroup parent = group;
while (parent != null)
{
if (!m_invalidatedGroups.Contains(parent))
{
m_invalidatedGroups.Add(parent);
}
parent.ClearStatFunctionsResult();
parent.CalculateAllStats = calculateAllStats;
parent = parent.Parent;
}
if (m_dispatcher != null)
{
if (m_dispatcherOperation == null)
{
m_dispatcherOperation = m_dispatcher.BeginInvoke(DispatcherPriority.DataBind, new DispatcherOperationCallback(this.Dispatched_Process), null);
m_dispatcherOperationStartTime = DateTime.UtcNow;
}
else
{
m_hasNewOperationsSinceStartTime = true;
}
}
}
}
internal void SortGroups(List <GroupSortComparer> groupSortComparers, int level)
{
int itemCount = this.ProtectedItemCount;
if (itemCount == 0)
{
return;
}
int[] indexes;
indexes = new int[itemCount + 1];
for (int i = 0; i < itemCount; i++)
{
indexes[i] = i;
}
DataGridCollectionViewGroup[] subGroupsArray = new DataGridCollectionViewGroup[itemCount];
m_subGroups.Values.CopyTo(subGroupsArray, 0);
// "Weak heap sort" sort array[0..NUM_ELEMENTS-1] to array[1..NUM_ELEMENTS]
DataGridCollectionViewGroupSort collectionViewSort = new DataGridCollectionViewGroupSort(indexes, groupSortComparers[level], subGroupsArray);
collectionViewSort.Sort(itemCount);
level++;
m_protectedItems.Clear();
for (int i = 1; i <= itemCount; i++)
{
DataGridCollectionViewGroup group = subGroupsArray[indexes[i]];
// Sort sub groups
if (!group.IsBottomLevel)
{
group.SortGroups(groupSortComparers, level);
}
m_protectedItems.Add(group);
}
this.ProtectedItemCount = m_protectedItems.Count;
m_protectedItemsCollectionChanged.Invoke(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
}
internal virtual void RemoveRawItemAt(int index)
{
Debug.Assert(this.IsBottomLevel);
Debug.Assert(m_sortedRawItems != null);
if (m_sortedRawItems == null)
{
return;
}
if (index != -1)
{
m_globalRawItemCount--;
DataGridCollectionViewGroup parent = m_parent;
while (parent != null)
{
parent.m_globalRawItemCount--;
parent = parent.Parent;
}
int count = m_sortedRawItems.Count;
for (int i = index + 1; i < count; i++)
{
m_sortedRawItems[i].SetSortedIndex(i - 1);
}
RawItem rawItem = m_sortedRawItems[index];
rawItem.SetParentGroup(null);
rawItem.SetSortedIndex(-1);
m_sortedRawItems.RemoveAt(index);
this.ProtectedItemCount--;
this.ProtectedItems.RemoveAt(index);
if ((this.ProtectedItemCount == 0) && (m_parent != null))
{
m_parent.RemoveGroup(this);
}
}
}
internal void InvalidateGroupStats(DataGridCollectionViewGroup group)
{
if (group == null)
{
return;
}
lock (this)
{
if (this.RefreshPending)
{
return;
}
if (m_invalidatedGroups == null)
{
m_invalidatedGroups = new List <DataGridCollectionViewGroup>(64);
}
DataGridCollectionViewGroup parent = group;
while (parent != null)
{
if (!m_invalidatedGroups.Contains(parent))
{
parent.ClearStatFunctionsResult();
m_invalidatedGroups.Add(parent);
}
parent = parent.Parent;
}
if ((m_dispatcherOperation == null) && (m_dispatcher != null))
{
m_dispatcherOperation = m_dispatcher.BeginInvoke(
DispatcherPriority.DataBind,
new DispatcherOperationCallback(this.Dispatched_Process),
null);
}
}
}
internal void GetGlobalItems(List <object> items)
{
if (this.IsBottomLevel)
{
items.AddRange(this.ProtectedItems);
return;
}
int count = this.ItemCount;
for (int i = 0; i < count; i++)
{
DataGridCollectionViewGroup subGroup = this.ProtectedItems[i] as DataGridCollectionViewGroup;
if (subGroup == null)
{
throw new InvalidOperationException("Sub-groups cannot be null (Nothing in Visual Basic).");
}
subGroup.GetGlobalItems(items);
}
}
internal static SelectionRange GetRange(this CollectionViewGroup collectionViewGroup, DataGridContext dataGridContext)
{
int startIndex = -1;
int endIndex = -1;
DataGridVirtualizingCollectionViewGroupBase dataGridVirtualizingCollectionViewGroupBase = collectionViewGroup as DataGridVirtualizingCollectionViewGroupBase;
DataGridCollectionViewGroup dataGridCollectionViewGroup = collectionViewGroup as DataGridCollectionViewGroup;
if (dataGridVirtualizingCollectionViewGroupBase != null)
{
startIndex = dataGridVirtualizingCollectionViewGroupBase.StartGlobalIndex;
endIndex = startIndex + dataGridVirtualizingCollectionViewGroupBase.VirtualItemCount - 1;
}
else if (dataGridCollectionViewGroup != null)
{
startIndex = dataGridCollectionViewGroup.GetFirstRawItemGlobalSortedIndex();
endIndex = startIndex + dataGridCollectionViewGroup.GlobalRawItemCount - 1;
}
else if (collectionViewGroup.ItemCount > 0)
{
if (dataGridContext == null)
{
throw new DataGridInternalException("This collectionViewGroup require a DataGridContext instance");
}
var firstItem = collectionViewGroup.GetFirstLeafItem();
var lastItem = collectionViewGroup.GetLastLeafItem();
if (firstItem != null && lastItem != null)
{
startIndex = dataGridContext.Items.IndexOf(firstItem);
endIndex = dataGridContext.Items.IndexOf(lastItem);
}
}
return((startIndex >= 0) && (startIndex <= endIndex)
? new SelectionRange(startIndex, endIndex)
: SelectionRange.Empty);
}
public static IList <object> GetItems(this CollectionViewGroup collectionViewGroup)
{
DataGridVirtualizingCollectionViewGroupBase dataGridVirtualizingCollectionViewGroupBase = collectionViewGroup as DataGridVirtualizingCollectionViewGroupBase;
if (dataGridVirtualizingCollectionViewGroupBase != null)
{
return(dataGridVirtualizingCollectionViewGroupBase.VirtualItems);
}
DataGridCollectionViewGroup dataGridCollectionViewGroup = collectionViewGroup as DataGridCollectionViewGroup;
if (dataGridCollectionViewGroup != null)
{
// The Items property of the DataGridCollectionViewGroup has been optimized
// to allow faster IndexOf and Contains. Since this property we could not
// override the property, we had to new it thus, we need to cast the CollectionViewGroup
// in the right type before acecssing the property.
return(dataGridCollectionViewGroup.Items);
}
return(collectionViewGroup.Items);
}
internal void SortItems(
SortDescriptionInfo[] sortDescriptionInfos,
GroupSortComparer[] groupSortComparers,
int level,
List<RawItem> globalRawItems,
DataGridCollectionViewGroup newSortedGroup )
{
int itemCount = this.ItemCount;
if( itemCount == 0 )
return;
ObservableCollection<object> groupItems = this.ProtectedItems;
if( this.IsBottomLevel )
{
int[] indexes;
indexes = new int[ itemCount + 1 ];
for( int i = 0; i < itemCount; i++ )
{
indexes[ i ] = m_sortedRawItems[ i ].Index;
}
// "Weak heap sort" sort array[0..NUM_ELEMENTS-1] to array[1..NUM_ELEMENTS]
DataGridCollectionViewSort collectionViewSort =
new DataGridCollectionViewSort( indexes, sortDescriptionInfos );
collectionViewSort.Sort( itemCount );
int index = 0;
for( int i = 1; i <= itemCount; i++ )
{
newSortedGroup.InsertRawItem( index, globalRawItems[ indexes[ i ] ] );
index++;
}
}
else
{
int[] indexes;
indexes = new int[ itemCount + 1 ];
for( int i = 0; i < itemCount; i++ )
{
indexes[ i ] = i;
}
// "Weak heap sort" sort array[0..NUM_ELEMENTS-1] to array[1..NUM_ELEMENTS]
DataGridCollectionViewGroupSort collectionViewSort =
new DataGridCollectionViewGroupSort( indexes, groupSortComparers[ level ], this );
collectionViewSort.Sort( itemCount );
int index = 0;
level++;
for( int i = 1; i <= itemCount; i++ )
{
DataGridCollectionViewGroup oldGroup = ( DataGridCollectionViewGroup )groupItems[ indexes[ i ] ];
DataGridCollectionViewGroup newGroup = new DataGridCollectionViewGroup( oldGroup, newSortedGroup );
// Sort sub items
oldGroup.SortItems( sortDescriptionInfos, groupSortComparers, level, globalRawItems, newGroup );
newSortedGroup.InsertGroup( index, newGroup );
index++;
}
}
}
public DataGridCollectionViewGroup( object name, DataGridCollectionViewGroup parent, int unsortedIndex )
: base( name )
{
m_parent = parent;
m_unsortedIndex = unsortedIndex;
}
internal void InvalidateGroupStats( DataGridCollectionViewGroup group )
{
if( group == null )
return;
lock( this )
{
if( this.RefreshPending )
return;
if( m_invalidatedGroups == null )
m_invalidatedGroups = new List<DataGridCollectionViewGroup>( 64 );
DataGridCollectionViewGroup parent = group;
while( parent != null )
{
if( !m_invalidatedGroups.Contains( parent ) )
{
parent.ClearStatFunctionsResult();
m_invalidatedGroups.Add( parent );
}
parent = parent.Parent;
}
if( ( m_dispatcherOperation == null ) && ( m_dispatcher != null ) )
{
m_dispatcherOperation = m_dispatcher.BeginInvoke(
DispatcherPriority.DataBind,
new DispatcherOperationCallback( this.Dispatched_Process ),
null );
}
}
}
internal int BinarySearchGroup( DataGridCollectionViewGroup value, IComparer<DataGridCollectionViewGroup> comparer )
{
if( comparer == null )
throw new ArgumentNullException( "comparer" );
ObservableCollection<object> items = this.ProtectedItems;
Debug.Assert( items.Count == this.ItemCount );
int low = 0;
int hi = ( items.Count ) - 1;
while( low <= hi )
{
int compareResult;
int median = ( low + ( ( hi - low ) >> 1 ) );
DataGridCollectionViewGroup medianGroup = items[ median ] as DataGridCollectionViewGroup;
// We exclude ourself from the research because we seek for a new valid position
if( medianGroup == value )
{
if( low == hi )
return low;
median++;
medianGroup = items[ median ] as DataGridCollectionViewGroup;
}
try
{
compareResult = comparer.Compare( medianGroup, value );
}
catch( Exception exception )
{
throw new InvalidOperationException( "IComparer has failed to compare the values.", exception );
}
if( compareResult == 0 )
{
return median;
}
if( compareResult < 0 )
{
low = median + 1;
}
else
{
hi = median - 1;
}
}
return ~low;
}
private DataGridCollectionViewGroup CreateSubGroup( object groupName, int level, ObservableCollection<GroupDescription> groupByList, GroupSortComparer[] groupSortComparers )
{
// If sortComparers is null, we are in massive group creation, no order check.
DataGridCollectionViewGroup group = new DataGridCollectionViewGroup( groupName, this, m_nextSubGroupUnsortedIndex );
unchecked
{
m_nextSubGroupUnsortedIndex++;
}
int index;
if( groupSortComparers == null )
{
Debug.Assert( this.ProtectedItemCount == this.ProtectedItems.Count );
index = this.ProtectedItemCount;
}
else
{
index = this.BinarySearchGroup( group, groupSortComparers[ level ] );
if( index < 0 )
index = ~index;
}
level++;
if( level < groupByList.Count )
{
group.SetSubGroupBy( groupByList[ level ] );
group.CreateFixedGroupNames( level, groupByList, groupSortComparers );
}
this.InsertGroup( index, group );
return group;
}
private void InsertGroup( int index, DataGridCollectionViewGroup group )
{
Debug.Assert( !this.IsBottomLevel );
m_groupsDictionary.Add( DataGridCollectionViewGroup.GetHashKeyFromName( group.Name ), group );
this.ProtectedItemCount++;
this.ProtectedItems.Insert( index, group );
}
public void InvalidateGroupStats( DataGridCollectionViewGroup group, bool calculateAllStats = false )
{
if( group == null )
return;
lock( this )
{
if( this.RefreshPending )
return;
DataGridCollectionViewGroup parent = group;
while( parent != null )
{
if( !m_invalidatedGroups.Contains( parent ) )
{
m_invalidatedGroups.Add( parent );
}
parent.ClearStatFunctionsResult();
parent.CalculateAllStats = calculateAllStats;
parent = parent.Parent;
}
if( m_dispatcher != null )
{
if( m_dispatcherOperation == null )
{
m_dispatcherOperation = m_dispatcher.BeginInvoke( DispatcherPriority.DataBind, new DispatcherOperationCallback( this.Dispatched_Process ), null );
m_dispatcherOperationStartTime = DateTime.UtcNow;
}
else
{
m_hasNewOperationsSinceStartTime = true;
}
}
}
}
private void RemoveGroup( DataGridCollectionViewGroup group )
{
if( group == null )
throw new ArgumentNullException( "group" );
Debug.Assert( this == group.m_parent );
// We do not remove group forced in SubGroupBy.GroupNames
if( group.UnsortedIndex < this.SubGroupBy.GroupNames.Count )
return;
Debug.Assert( !this.IsBottomLevel );
Debug.Assert( ( group.m_globalRawItemCount == 0 ) && ( group.ProtectedItemCount == 0 ) );
this.ProtectedItemCount--;
m_groupsDictionary.Remove( DataGridCollectionViewGroup.GetHashKeyFromName( group.Name ) );
this.ProtectedItems.Remove( group );
if( ( this.ProtectedItemCount == 0 ) && ( m_parent != null ) )
m_parent.RemoveGroup( this );
}
private DataGridCollectionViewGroup MoveToFirstLeafGroup( DataGridCollectionViewGroup referenceGroup, int index )
{
while( !referenceGroup.IsBottomLevel )
{
referenceGroup = referenceGroup.Items[ index ] as DataGridCollectionViewGroup;
m_currentGroupIndex.Push( index );
if( index != 0 )
index = 0;
}
return referenceGroup;
}
internal void SortItems(
SortDescriptionInfo[] sortDescriptionInfos,
GroupSortComparer[] groupSortComparers,
int level,
List <RawItem> globalRawItems,
DataGridCollectionViewGroup newSortedGroup)
{
int itemCount = this.ItemCount;
if (itemCount == 0)
{
return;
}
ObservableCollection <object> groupItems = this.ProtectedItems;
if (this.IsBottomLevel)
{
int[] indexes;
indexes = new int[itemCount + 1];
for (int i = 0; i < itemCount; i++)
{
indexes[i] = m_sortedRawItems[i].Index;
}
// "Weak heap sort" sort array[0..NUM_ELEMENTS-1] to array[1..NUM_ELEMENTS]
DataGridCollectionViewSort collectionViewSort =
new DataGridCollectionViewSort(indexes, sortDescriptionInfos);
collectionViewSort.Sort(itemCount);
int index = 0;
for (int i = 1; i <= itemCount; i++)
{
newSortedGroup.InsertRawItem(index, globalRawItems[indexes[i]]);
index++;
}
}
else
{
int[] indexes;
indexes = new int[itemCount + 1];
for (int i = 0; i < itemCount; i++)
{
indexes[i] = i;
}
// "Weak heap sort" sort array[0..NUM_ELEMENTS-1] to array[1..NUM_ELEMENTS]
DataGridCollectionViewGroupSort collectionViewSort =
new DataGridCollectionViewGroupSort(indexes, groupSortComparers[level], this);
collectionViewSort.Sort(itemCount);
int index = 0;
level++;
for (int i = 1; i <= itemCount; i++)
{
DataGridCollectionViewGroup oldGroup = ( DataGridCollectionViewGroup )groupItems[indexes[i]];
DataGridCollectionViewGroup newGroup = new DataGridCollectionViewGroup(oldGroup, newSortedGroup);
// Sort sub items
oldGroup.SortItems(sortDescriptionInfos, groupSortComparers, level, globalRawItems, newGroup);
newSortedGroup.InsertGroup(index, newGroup);
index++;
}
}
}
internal void SetParentGroup( DataGridCollectionViewGroup parentGroup )
{
m_parentGroup = parentGroup;
}
public DataGridCollectionViewGroup(object name, DataGridCollectionViewGroup parent, int unsortedIndex)
: base(name)
{
m_parent = parent;
m_unsortedIndex = unsortedIndex;
}