public bool SelectItemCells(
int itemIndex,
object item,
HashedLinkedList <ColumnBase> columnsByVisiblePosition,
bool preserveSelection)
{
bool selectionDone = true;
int columnsCount = columnsByVisiblePosition.Count;
m_toDeferSelect.Clear();
SelectionCellRangeWithItems rangeWithItemsToSelect =
new SelectionCellRangeWithItems(
new SelectionRange(itemIndex),
new object[] { item },
new SelectionRange(0, columnsCount - 1));
SelectionCellRange cellRange = rangeWithItemsToSelect.CellRange;
m_cellsToSelect.Clear();
SelectedCellsStorage selectedCellsInChange = m_owner.SelectedCellsStore;
// Remove all currently selected Cells from the new selectionRange
// to avoid duplicate SelectionCellRange
SelectedCellsStorage tempStorage = new SelectedCellsStorage(null);
tempStorage.Add(rangeWithItemsToSelect);
for (int i = 0; i < selectedCellsInChange.Count; i++)
{
tempStorage.Remove(selectedCellsInChange[i]);
}
foreach (ColumnBase column in columnsByVisiblePosition)
{
if (!column.Visible)
{
tempStorage.Remove(new SelectionCellRangeWithItems(itemIndex, item, column.VisiblePosition));
}
}
int tempStorageCount = tempStorage.Count;
// All Cells are already selected
if (tempStorageCount == 0)
{
if (!m_cellsToUnselect.Contains(cellRange))
{
selectionDone = false;
}
m_cellsToUnselect.Clear();
if (!preserveSelection)
{
foreach (SelectionCellRangeWithItems selectedCellRangeWithItems in selectedCellsInChange)
{
m_cellsToUnselect.Add(selectedCellRangeWithItems);
}
}
m_cellsToUnselect.Remove(rangeWithItemsToSelect);
}
else
{
// Add each range to selection
for (int i = 0; i < tempStorageCount; i++)
{
m_cellsToSelect.Add(tempStorage[i]);
}
m_cellsToUnselect.Clear();
if (!preserveSelection)
{
foreach (SelectionCellRangeWithItems selectedCellRangeWithItems in selectedCellsInChange)
{
tempStorage = new SelectedCellsStorage(null);
tempStorage.Add(selectedCellRangeWithItems);
tempStorage.Remove(rangeWithItemsToSelect);
tempStorageCount = tempStorage.Count;
for (int i = 0; i < tempStorageCount; i++)
{
m_cellsToUnselect.Add(tempStorage[i]);
}
}
}
}
if (!preserveSelection)
{
this.UnselectAllItems();
}
return(selectionDone);
}
public void Visit(DataGridContext sourceContext, ref bool stopVisit)
{
object[] items;
CollectionView itemsCollection = sourceContext.Items;
int count = itemsCollection.Count;
if (count == 0)
{
return;
}
if (sourceContext.ItemsSourceCollection is DataGridVirtualizingCollectionViewBase)
{
items = null;
}
else
{
items = new object[count];
for (int i = 0; i < count; i++)
{
items[i] = itemsCollection.GetItemAt(i);
}
}
SelectionRange itemRange = new SelectionRange(0, count - 1);
if (sourceContext.DataGridControl.SelectionUnit == SelectionUnit.Row)
{
sourceContext.DataGridControl.SelectionChangerManager.SelectItems(
sourceContext,
new SelectionRangeWithItems(itemRange, items));
}
else
{
HashedLinkedList <ColumnBase> columnsByVisiblePosition = sourceContext.ColumnsByVisiblePosition;
SelectedItemsStorage selectedColumnStore = new SelectedItemsStorage(null);
SelectionRange fullColumnRange = new SelectionRange(0, columnsByVisiblePosition.Count - 1);
selectedColumnStore.Add(new SelectionRangeWithItems(fullColumnRange, null));
int index = 0;
foreach (ColumnBase column in columnsByVisiblePosition)
{
if (!column.Visible)
{
selectedColumnStore.Remove(new SelectionRangeWithItems(new SelectionRange(index), null));
}
index++;
}
int columnRangeCount = selectedColumnStore.Count;
for (int i = 0; i < columnRangeCount; i++)
{
sourceContext.DataGridControl.SelectionChangerManager.SelectCells(
sourceContext,
new SelectionCellRangeWithItems(itemRange, items, selectedColumnStore[i].Range));
}
}
}
