internal LiveShapingList(ICollectionViewLiveShaping view, LiveShapingFlags flags, IComparer comparer)
{
_view = view;
_comparer = comparer;
_isCustomSorting = !(comparer is SortFieldComparer);
_dpFromPath = new DPFromPath();
_root = new LiveShapingTree(this);
if (comparer != null)
{
_root.Comparison = CompareLiveShapingItems;
}
_sortDirtyItems = new List <LiveShapingItem>();
_filterDirtyItems = new List <LiveShapingItem>();
_groupDirtyItems = new List <LiveShapingItem>();
SetLiveShapingProperties(flags);
}
public void Clear()
{
ForEach((x) => { ClearItem(x); });
_root = new LiveShapingTree(this);
}
// reset the collections of properties to observe, and their
// corresponding DPs
internal void SetLiveShapingProperties(LiveShapingFlags flags)
{
int k, n;
string path;
_dpFromPath.BeginReset();
// Sorting //
// get the properties used for comparison
SortDescriptionCollection sdc = ((ICollectionView)View).SortDescriptions;
n = sdc.Count;
_compInfos = new LivePropertyInfo[n];
for (k = 0; k < n; ++k)
{
path = NormalizePath(sdc[k].PropertyName);
_compInfos[k] = new LivePropertyInfo(path, _dpFromPath.GetDP(path));
}
if (TestLiveShapingFlag(flags, LiveShapingFlags.Sorting))
{
// get the list of property paths to observe
Collection <string> sortProperties = View.LiveSortingProperties;
if (sortProperties.Count == 0)
{
// use the sort description properties
_sortInfos = _compInfos;
}
else
{
// use the explicit list of properties
n = sortProperties.Count;
_sortInfos = new LivePropertyInfo[n];
for (k = 0; k < n; ++k)
{
path = NormalizePath(sortProperties[k]);
_sortInfos[k] = new LivePropertyInfo(path, _dpFromPath.GetDP(path));
}
}
}
else
{
_sortInfos = new LivePropertyInfo[0];
}
// Filtering //
if (TestLiveShapingFlag(flags, LiveShapingFlags.Filtering))
{
// get the list of property paths to observe
Collection <string> filterProperties = View.LiveFilteringProperties;
n = filterProperties.Count;
_filterInfos = new LivePropertyInfo[n];
for (k = 0; k < n; ++k)
{
path = NormalizePath(filterProperties[k]);
_filterInfos[k] = new LivePropertyInfo(path, _dpFromPath.GetDP(path));
}
_filterRoot = new LiveShapingTree(this);
}
else
{
_filterInfos = new LivePropertyInfo[0];
_filterRoot = null;
}
// Grouping //
if (TestLiveShapingFlag(flags, LiveShapingFlags.Grouping))
{
// get the list of property paths to observe
Collection <string> groupingProperties = View.LiveGroupingProperties;
if (groupingProperties.Count == 0)
{
// if no explicit list, use the group description properties
groupingProperties = new Collection <string>();
ICollectionView icv = View as ICollectionView;
ObservableCollection <GroupDescription> groupDescriptions = (icv != null) ? icv.GroupDescriptions : null;
if (groupDescriptions != null)
{
foreach (GroupDescription gd in groupDescriptions)
{
PropertyGroupDescription pgd = gd as PropertyGroupDescription;
if (pgd != null)
{
groupingProperties.Add(pgd.PropertyName);
}
}
}
}
n = groupingProperties.Count;
_groupInfos = new LivePropertyInfo[n];
for (k = 0; k < n; ++k)
{
path = NormalizePath(groupingProperties[k]);
_groupInfos[k] = new LivePropertyInfo(path, _dpFromPath.GetDP(path));
}
}
else
{
_groupInfos = new LivePropertyInfo[0];
}
_dpFromPath.EndReset();
}