public virtual bool IsCompatible(GridViewColumn data, object context)
{
GridVirtualizedRowElement virtualizedRowElement = context as GridVirtualizedRowElement;
if (virtualizedRowElement == null)
{
return(false);
}
return(data.GetCellType(virtualizedRowElement.RowInfo).IsAssignableFrom(this.GetType()));
}
private void ColumnScroller_ScrollerUpdated(object sender, EventArgs e)
{
this.RowLayout.EnsureColumnsLayout();
foreach (GridRowElement visualRow in (IEnumerable <GridRowElement>) this.TableElement.VisualRows)
{
GridVirtualizedRowElement virtualizedRowElement = visualRow as GridVirtualizedRowElement;
if (virtualizedRowElement != null)
{
virtualizedRowElement.ScrollableColumns.ScrollOffset = new SizeF((float)-this.TableElement.ColumnScroller.ScrollOffset, 0.0f);
virtualizedRowElement.ScrollableColumns.UpdateItems();
}
}
this.oldHScrollValue = this.TableElement.ColumnScroller.Scrollbar.Value;
}
public override IVirtualizedElement <GridViewRowInfo> GetElement(
GridViewRowInfo data,
object context)
{
if (data.ViewTemplate.ColumnCount == 0)
{
return((IVirtualizedElement <GridViewRowInfo>)null);
}
IVirtualizedElement <GridViewRowInfo> element = base.GetElement(data, context);
GridVirtualizedRowElement virtualizedRowElement = element as GridVirtualizedRowElement;
if (virtualizedRowElement != null)
{
virtualizedRowElement.ScrollableColumns.ScrollOffset = new SizeF((float)-this.rowView.ColumnScroller.ScrollOffset, 0.0f);
}
return(element);
}
public int IndexOf(GridCellElement item)
{
if (this.row == null)
{
return(-1);
}
if (!(this.row is GridVirtualizedRowElement))
{
return(this.row.Children.IndexOf((RadElement)item));
}
GridVirtualizedRowElement row = (GridVirtualizedRowElement)this.row;
if (item.ColumnInfo.PinPosition == PinnedColumnPosition.Left)
{
for (int index = 0; index < row.LeftPinnedColumns.Children.Count; ++index)
{
if (row.LeftPinnedColumns.Children[index] == item)
{
return(index);
}
}
return(-1);
}
if (item.ColumnInfo.PinPosition == PinnedColumnPosition.Right)
{
for (int index = 0; index < row.RightPinnedColumns.Children.Count; ++index)
{
if (row.RightPinnedColumns.Children[index] == item)
{
return(index + row.LeftPinnedColumns.Children.Count + row.ScrollableColumns.Children.Count);
}
}
return(-1);
}
for (int index = 0; index < row.ScrollableColumns.Children.Count; ++index)
{
if (row.ScrollableColumns.Children[index] == item)
{
return(index + row.LeftPinnedColumns.Children.Count);
}
}
return(-1);
}
private void Detach(
IVirtualizedElementProvider <GridViewRowInfo> rowElementProvider,
GridRowElement row)
{
GridVirtualizedRowElement virtualizedRowElement = row as GridVirtualizedRowElement;
if (virtualizedRowElement != null)
{
rowElementProvider.CacheElement((IVirtualizedElement <GridViewRowInfo>)virtualizedRowElement);
virtualizedRowElement.Detach();
if (virtualizedRowElement.Parent == null || !virtualizedRowElement.Parent.Children.Contains((RadElement)virtualizedRowElement))
{
return;
}
virtualizedRowElement.Parent.Children.Remove((RadElement)virtualizedRowElement);
}
else
{
row.Dispose();
}
}
public GridCellElement this[int index]
{
get
{
if (this.row == null)
{
return((GridCellElement)null);
}
if (index < 0)
{
return((GridCellElement)null);
}
GridVirtualizedRowElement row = this.row as GridVirtualizedRowElement;
if (row == null)
{
return((GridCellElement)this.row.Children[index]);
}
int count1 = row.LeftPinnedColumns.Children.Count;
if (index < count1)
{
return((GridCellElement)row.LeftPinnedColumns.Children[index]);
}
int count2 = row.ScrollableColumns.Children.Count;
index -= count1;
if (index < count2)
{
return((GridCellElement)row.ScrollableColumns.Children[index]);
}
index -= count2;
if (index < row.RightPinnedColumns.Children.Count)
{
return((GridCellElement)row.RightPinnedColumns.Children[index]);
}
return((GridCellElement)null);
}
set
{
throw new NotImplementedException();
}
}
public void UpdateRows(bool updateCells)
{
if (updateCells)
{
this.RowLayout.InvalidateLayout();
foreach (GridRowElement visualRow in (IEnumerable <GridRowElement>) this.TableElement.VisualRows)
{
GridVirtualizedRowElement virtualizedRowElement = visualRow as GridVirtualizedRowElement;
if (virtualizedRowElement != null)
{
virtualizedRowElement.LeftPinnedColumns.UpdateItems();
virtualizedRowElement.ScrollableColumns.UpdateItems();
virtualizedRowElement.RightPinnedColumns.UpdateItems();
}
}
}
this.RowLayout.EnsureColumnsLayout();
this.TopPinnedRows.UpdateItems();
this.ScrollableRows.UpdateItems();
this.BottomPinnedRows.UpdateItems();
this.InvalidateMeasure();
}
public virtual bool EnsureCellVisible(GridViewRowInfo rowInfo, GridViewColumn column)
{
if (!this.TableElement.ElementTree.Control.Visible || this.TableElement.ElementTree.Control.Size == Size.Empty)
{
return(false);
}
this.EnsureRowVisible(rowInfo);
GridRowElement rowElement = this.GetRowElement(rowInfo);
if (rowElement == null || column == null || (!column.IsVisible || column.IsGrouped) || column.OwnerTemplate.Parent == null && column.IsPinned)
{
return(false);
}
Rectangle empty = Rectangle.Empty;
Rectangle rectangle = rowInfo.PinPosition != PinnedRowPosition.Top ? (rowInfo.PinPosition != PinnedRowPosition.Bottom ? this.ViewElement.ScrollableRows.ControlBoundingRectangle : this.ViewElement.BottomPinnedRows.ControlBoundingRectangle) : this.ViewElement.TopPinnedRows.ControlBoundingRectangle;
bool flag1 = rowElement.ElementTree.Control.RightToLeft == RightToLeft.Yes;
GridVirtualizedRowElement virtualizedRowElement = rowElement as GridVirtualizedRowElement;
if (virtualizedRowElement != null)
{
rectangle.X = virtualizedRowElement.ScrollableColumns.ControlBoundingRectangle.X;
if (flag1)
{
rectangle.X -= virtualizedRowElement.TableElement.CellSpacing;
}
rectangle.Width = virtualizedRowElement.ScrollableColumns.ControlBoundingRectangle.Width;
}
foreach (GridCellElement visualCell in rowElement.VisualCells)
{
if ((visualCell.ColumnInfo == null || !visualCell.ColumnInfo.IsPinned) && visualCell.ColumnInfo == column)
{
if (visualCell.ControlBoundingRectangle.Width > rectangle.Width)
{
return(false);
}
if (visualCell.ControlBoundingRectangle.Right > rectangle.Right + 1)
{
if (this.TableElement.ColumnScroller.ScrollMode == ItemScrollerScrollModes.Discrete)
{
int num1 = this.ColumnScroller.Scrollbar.Maximum - this.ColumnScroller.Scrollbar.LargeChange + 1;
int num2 = column.Index;
if (num2 > num1)
{
num2 = num1;
}
this.ColumnScroller.Scrollbar.Value = num2;
}
else
{
int num = visualCell.ControlBoundingRectangle.Right - rectangle.Right;
if (flag1)
{
num *= -1;
}
this.ChangeScrollbarValue(this.ColumnScroller.Scrollbar, this.ColumnScroller.Scrollbar.Value + num);
}
}
if (visualCell.ControlBoundingRectangle.X < rectangle.X - 1)
{
if (this.TableElement.ColumnScroller.ScrollMode == ItemScrollerScrollModes.Discrete)
{
int num1 = this.ColumnScroller.Scrollbar.Maximum - this.ColumnScroller.Scrollbar.LargeChange + 1;
int num2 = column.Index;
if (num2 > num1)
{
num2 = num1;
}
this.ColumnScroller.Scrollbar.Value = num2;
}
else
{
int num = visualCell.ControlBoundingRectangle.X - rectangle.X;
if (flag1)
{
num *= -1;
}
this.ChangeScrollbarValue(this.ColumnScroller.Scrollbar, this.ColumnScroller.Scrollbar.Value + num);
}
}
return(true);
}
}
if (rowInfo is GridViewGroupRowInfo)
{
return(false);
}
ColumnGroupRowLayout rowLayout = this.TableElement.ViewElement.RowLayout as ColumnGroupRowLayout;
if (rowLayout != null)
{
this.ChangeScrollbarValue(this.ColumnScroller.Scrollbar, rowLayout.GetColumnOffset(column));
return(true);
}
int num3 = this.ColumnScroller.Scrollbar.Value;
bool flag2;
if (this.TableElement.ColumnScroller.ScrollMode == ItemScrollerScrollModes.Discrete)
{
int num1 = this.ColumnScroller.Scrollbar.Maximum - this.ColumnScroller.Scrollbar.LargeChange + 1;
int num2 = column.Index;
if (num2 > num1)
{
num2 = num1;
}
this.ColumnScroller.Scrollbar.Value = num2;
this.TableElement.Invalidate();
flag2 = true;
}
else
{
flag2 = this.ColumnScroller.ScrollToItem(column, false);
}
if (num3 < this.ColumnScroller.Scrollbar.Value)
{
this.UpdateLayout();
foreach (GridCellElement visualCell in rowElement.VisualCells)
{
if ((visualCell.ColumnInfo == null || !visualCell.ColumnInfo.IsPinned) && visualCell.ColumnInfo == column)
{
this.ChangeScrollbarValue(this.ColumnScroller.Scrollbar, this.ColumnScroller.Scrollbar.Value + (flag1 ? rectangle.Left - visualCell.ControlBoundingRectangle.Left : visualCell.ControlBoundingRectangle.Right - rectangle.Right));
}
}
}
return(flag2);
}
