internal override void EnsureColumns(VisibleLinesCollection visibleColumnLines)
{
if (this.RowIndex == -1)
{
this.RowLevel = -1;
return;
}
this.VisibleColumns.ForEach(column => column.IsEnsured = false);
var StartBodyColumnIndex = (visibleColumnLines.firstBodyVisibleIndex < visibleColumnLines.Count) ? visibleColumnLines[visibleColumnLines.firstBodyVisibleIndex].LineIndex : visibleColumnLines[visibleColumnLines.LastBodyVisibleIndex].LineIndex;
if (this.CoveredCells.Count > 0 || this.RowIndex < this.DataGrid.HeaderLineCount)
{
for (int i = 0; i < 3; i++)
{
int startColumnIndex;
int endColumnIndex;
if (i == 0)
{
if (visibleColumnLines.FirstBodyVisibleIndex <= 0)
{
continue;
}
startColumnIndex = 0;
endColumnIndex = visibleColumnLines[visibleColumnLines.FirstBodyVisibleIndex - 1].LineIndex;
}
else if (i == 1)
{
if (visibleColumnLines.FirstBodyVisibleIndex <= 0 && visibleColumnLines.LastBodyVisibleIndex < 0)
{
continue;
}
if (visibleColumnLines.Count > visibleColumnLines.firstBodyVisibleIndex)
{
startColumnIndex = visibleColumnLines[visibleColumnLines.FirstBodyVisibleIndex].LineIndex;
}
else
{
continue;
}
endColumnIndex = visibleColumnLines[visibleColumnLines.LastBodyVisibleIndex].LineIndex;
}
else
{
if (visibleColumnLines.FirstFooterVisibleIndex >= visibleColumnLines.Count)
{
continue;
}
startColumnIndex = visibleColumnLines[visibleColumnLines.FirstFooterVisibleIndex].LineIndex;
endColumnIndex = visibleColumnLines[visibleColumnLines.Count - 1].LineIndex;
}
for (int index = startColumnIndex; index <= endColumnIndex; index++)
{
if (visibleColumnLines.All(row => row.LineIndex != index))
{
continue;
}
if (DataGrid.ShowRowHeader && index == 0)
{
var rhc = this.VisibleColumns.FirstOrDefault(column => column.ColumnIndex == index);
if (rhc != null)
{
if (rhc.ColumnVisibility == Visibility.Collapsed)
{
rhc.ColumnVisibility = Visibility.Visible;
}
rhc.IsEnsured = true;
}
else
{
CreateRowHeaderColumn(index);
}
continue;
}
if (this.DataGrid.View != null && this.DataGrid.DetailsViewManager.HasDetailsView && index == (this.DataGrid.ShowRowHeader ? this.DataGrid.View.GroupDescriptions.Count + 1 : this.DataGrid.View.GroupDescriptions.Count))
{
var dvc = this.VisibleColumns.FirstOrDefault(column => column.ColumnIndex == index);
if (dvc != null)
{
if (dvc.ColumnVisibility == Visibility.Collapsed)
{
dvc.ColumnVisibility = Visibility.Visible;
}
dvc.IsEnsured = true;
continue;
}
if (this.RowIndex < this.DataGrid.StackedHeaderRows.Count)
{
this.VisibleColumns.Add(this.CreateIndentColumn(index));
}
else if (this.RowType == RowType.SummaryRow || this.RowType == RowType.CaptionRow ||
this.RowType == RowType.TableSummaryRow)
{
this.VisibleColumns.Add(CreateDetailsViewIndentColumn(index));
}
continue;
}
var rowHeaderIndex = this.DataGrid.ShowRowHeader ? 1 : 0;
var indentCellIndex = -1;
if (this.RowType == RowType.CaptionCoveredRow)
{
indentCellIndex = this.DataGrid.View != null ? this.RowLevel + rowHeaderIndex : rowHeaderIndex;
}
else
{
indentCellIndex = this.DataGrid.View != null ? this.DataGrid.View.GroupDescriptions.Count + rowHeaderIndex : rowHeaderIndex;
}
if (index < indentCellIndex)
{
this.EnsureIndentColumns(visibleColumnLines, index);
this.CheckAvailablity(index, true);
continue;
}
else
{
CoveredCellInfo coveredCellItem = null;
if (this.RowType == RowType.CaptionCoveredRow || this.RowType == RowType.SummaryCoveredRow || this.RowType == RowType.TableSummaryCoveredRow)
{
coveredCellItem = this.CoveredCells.FirstOrDefault();
}
else
{
coveredCellItem = this.CoveredCells.FirstOrDefault(item => item.Left <= index && item.Right >= index);
}
var actualIndex = coveredCellItem != null ? coveredCellItem.Left : index;
if ((this.RowRegion == RowRegion.Body || RowType == RowType.TableSummaryCoveredRow || RowType == RowType.TableSummaryRow) && this.VisibleColumns.All(column => column.ColumnIndex != actualIndex))
{
if (this.VisibleColumns.Any(column => ((column.ColumnIndex < StartBodyColumnIndex || column.ColumnIndex > endColumnIndex) && !column.IsEnsured && !column.IsIndentColumn)))
{
var datacolumn = this.VisibleColumns.FirstOrDefault(column => ((column.ColumnIndex <StartBodyColumnIndex || column.ColumnIndex> endColumnIndex) && !column.IsEnsured && !column.IsIndentColumn && column.Renderer != null && column.Renderer != this.DataGrid.CellRenderers["RowHeader"]));
if (datacolumn != null)
{
UpdateColumn(datacolumn, index);
}
}
}
this.CheckAvailablity(actualIndex, false);
}
}
}
var orderedColumns = this.VisibleColumns.OrderBy(item => item.ColumnIndex);
this.ResetLastColumnBorderThickness(orderedColumns.LastOrDefault(col =>
{
if ((col.ColumnElement is GridGroupSummaryCell || col.ColumnElement is GridTableSummaryCell ||
col.ColumnElement is GridCaptionSummaryCell) && col.ColumnElement.Visibility != Visibility.Collapsed)
{
if (col.ColumnSpan > 0)
{
return(true);
}
else
{
return(col.GridColumn != null && !col.GridColumn.IsHidden);
}
}
else
{
return(false);
}
}), true);
}
if (this.RowType != Grid.RowType.TableSummaryRow || this.RowType != Grid.RowType.TableSummaryCoveredRow)
{
if (this.IsSelectedRow)
{
this.WholeRowElement.UpdateSelectionBorderClip();
}
//When scrolling horizontally the Focus border margin is not changed which sets the margin including the IndentCell Width,
//hence the below code is added.
else if (this.IsCurrentRow && this.DataGrid.SelectionMode == GridSelectionMode.Multiple)
{
this.WholeRowElement.UpdateFocusRowPosition();
}
}
this.VisibleColumns.ForEach(column =>
{
if (!column.IsEnsured)
{
CollapseColumn(column);
}
});
this.InvalidateMeasure();
}
internal override void EnsureColumns(VisibleLinesCollection visibleColumnLines)
{
// Initially all the columns will be IsEnsured false. we need to create the column to be view and that will be ensuered.
this.VisibleColumns.ForEach(column => column.IsEnsured = false);
var needToUpdateCurrentCell = this.TreeGrid.SelectionMode != GridSelectionMode.None && this.RowIndex != -1 && this.TreeGrid.NavigationMode == NavigationMode.Cell && !this.TreeGrid.SelectionController.CurrentCellManager.HasCurrentCell && this.RowIndex == this.TreeGrid.SelectionController.CurrentCellManager.CurrentRowColumnIndex.RowIndex;
//StartBodyColumnIndex - Which will make sure the actual column index.
var StartBodyColumnIndex = (visibleColumnLines.firstBodyVisibleIndex < visibleColumnLines.Count) ? visibleColumnLines[visibleColumnLines.firstBodyVisibleIndex].LineIndex : visibleColumnLines[visibleColumnLines.LastBodyVisibleIndex].LineIndex;
for (int i = 0; i < 2; i++)
{
int StartColumnIndex = 0;
int EndColumnIndex = 0;
if (i == 0)
{
if (visibleColumnLines.FirstBodyVisibleIndex <= 0)
{
continue;
}
StartColumnIndex = 0;
EndColumnIndex = visibleColumnLines[visibleColumnLines.FirstBodyVisibleIndex - 1].LineIndex;
}
// Below will make sure the start and end column index of row. which includes only data column.
else if (i == 1)
{
if (visibleColumnLines.FirstBodyVisibleIndex <= 0 && visibleColumnLines.LastBodyVisibleIndex < 0)
{
continue;
}
if (visibleColumnLines.Count > visibleColumnLines.firstBodyVisibleIndex)
{
StartColumnIndex = visibleColumnLines[visibleColumnLines.FirstBodyVisibleIndex].LineIndex;
}
else
{
continue;
}
EndColumnIndex = visibleColumnLines[visibleColumnLines.LastBodyVisibleIndex].LineIndex;
}
for (int index = StartColumnIndex; index <= EndColumnIndex; index++)
{
if (visibleColumnLines.All(row => row.LineIndex != index))
{
continue;
}
if (TreeGrid.showRowHeader && index == 0)
{
// Reuse the row header column by checking ColumnType instead of ColumnIndex (since we reset column index while removing row header column if ShowRowHeader is False).
var rhc = this.VisibleColumns.FirstOrDefault(column => column.ColumnType == TreeColumnType.RowHeader);
if (rhc != null)
{
if (rhc.ColumnVisibility == Visibility.Collapsed)
{
rhc.ColumnVisibility = Visibility.Visible;
}
rhc.IsEnsured = true;
// To reuse the column, need to set the column index here.
rhc.ColumnIndex = 0;
}
else
{
CreateRowHeaderColumn(index);
}
continue;
}
if (this.VisibleColumns.All(column => column.ColumnIndex != index || this.isDirty))
{
var hasExpanderColumn = this.VisibleColumns.Any(c => c.ColumnType == TreeColumnType.ExpanderColumn);
var isExpanderColumn = IsExpanderColumn(index);
// ColumnIndex needs to be checked with StartBodyColumnIndex and EndColumnIndex - Due to avoid reusing freezed columns from header and footer.
TreeDataColumnBase dataColumn;
if (hasExpanderColumn && isExpanderColumn)
{
dataColumn = this.VisibleColumns.FirstOrDefault(
column => ((column.ColumnIndex <StartBodyColumnIndex || column.ColumnIndex> EndColumnIndex || this.isDirty) &&
!column.IsEnsured && !column.IsEditing && (!column.IsCurrentCell || this.isDirty) && column.ColumnType == TreeColumnType.ExpanderColumn));
}
else
{
dataColumn = this.VisibleColumns.FirstOrDefault(
column => ((column.ColumnIndex <StartBodyColumnIndex || column.ColumnIndex> EndColumnIndex || this.isDirty) &&
!column.IsEnsured && column.ColumnType != TreeColumnType.RowHeader && !column.IsEditing && (!column.IsCurrentCell || this.isDirty) &&
(column.ColumnType != TreeColumnType.ExpanderColumn || (column.ColumnType == TreeColumnType.ExpanderColumn && isExpanderColumn))));
}
if (dataColumn != null && (!isExpanderColumn || dataColumn.ColumnType == TreeColumnType.ExpanderColumn))
{
// which will reuse the column element fully, or load its element with different one.
UpdateColumn(dataColumn, index);
}
}
var dc = this.VisibleColumns.FirstOrDefault(column => column.ColumnIndex == index);
if (dc != null)
{
if (dc.ColumnVisibility == Visibility.Collapsed)
{
dc.ColumnVisibility = Visibility.Visible;
dc.UpdateCellStyle();
if (dc.Renderer != null && (dc.Renderer.HasCurrentCellState && (dc.IsEditing || dc.TreeGridColumn.CanFocus())))
{
dc.Renderer.SetFocus(true);
}
}
if (needToUpdateCurrentCell)
{
this.UpdateCurrentCellSelection(dc);
}
dc.IsEnsured = true;
}
else
{
if (index >= this.TreeGrid.TreeGridPanel.ColumnCount)
{
continue;
}
var datacolumn = CreateColumn(index);
if (needToUpdateCurrentCell)
{
this.UpdateCurrentCellSelection(datacolumn);
}
datacolumn.IsEnsured = true;
this.VisibleColumns.Add(datacolumn);
}
}
}
this.VisibleColumns.ForEach(column =>
{
if (!column.IsEnsured)
{
CollapseColumn(column);
}
});
this.isDirty = false;
Panel panel = this.RowElement.ItemsPanel;
if (panel != null && this.TreeGrid.IsLoaded)
{
panel.InvalidateMeasure();
}
}