public IEnumerable <HTMLElement> BuildSummaryRow(
IEnumerable <RecordT> allItems, GroupDescr grp, IEnumerable <IDataGridColumn <RecordT> > colls)
{
return
(colls.Select(x => {
if (!x.IsGrouped && x.CurrentAggregation == null)
{
return new HTMLSpanElement {
TextContent = ""
};
}
if (x.IsGrouped)
{
return new HTMLSpanElement {
TextContent = grp.UserFriendlyGroupName
};
}
var result = x.CurrentAggregation(
allItems
.Skip(grp.FromPhsIdx)
.Take(1 + grp.TillPhsIdx - grp.FromPhsIdx));
return new HTMLSpanElement {
TextContent = result
};
}));
}
private void InsertGroupTrailer(int pos, GroupDescr grp)
{
_visRows.Insert(pos, grp);
var elems = _model.CurrentGroupingLogic.BuildSummaryRow(_model.Items, grp, _model.Columns);
_view.InsertBodyRow(pos, elems);
}
private void AppendGroupTrailer(GroupDescr grp)
{
var elems = _model.CurrentGroupingLogic.BuildSummaryRow(_model.Items, grp, _model.Columns);
_visRows.Append(grp);
var pos = _view.BodyRowCount;
_view.InsertBodyRow(pos, elems);
}
public static List <GroupDescr> GroupRecordsByKey <T>(
IEnumerable <T> allItems, Func <T, object> buildGroupingKey, Func <GroupDescr, string> summaryProvider)
{
var result = new List <GroupDescr>();
object curKey = null;
GroupDescr cur = null;
allItems.ForEachI((i, x) => {
if (cur == null)
{
curKey = buildGroupingKey(x);
cur = new GroupDescr {
FromPhsIdx = 0,
FromVisIdx = 0,
TillPhsIdx = -1 + 1,
TillVisIdx = 0 + 1,
KeyData = curKey
};
result.Add(cur);
return;
}
var key = buildGroupingKey(x);
if (key.Equals(curKey))
{
cur.TillPhsIdx++;
cur.TillVisIdx++;
return;
}
curKey = key;
cur = new GroupDescr {
FromPhsIdx = i,
FromVisIdx = cur.TillVisIdx + 1,
TillPhsIdx = i,
TillVisIdx = cur.TillVisIdx + 2,
KeyData = key
};
result.Add(cur);
});
result.ForEach(x => x.UserFriendlyGroupName = summaryProvider(x));
return(result);
}
public void Insert(int idx, GroupDescr grp)
{
_physical.Insert(idx, default(RecordT));
_grps.Insert(idx, grp);
}
public void Append(GroupDescr grp)
{
_physical.Add(default(RecordT));
_grps.Add(grp);
}
