public static DataGridViewAdvancedBorderStyle AdjustCellBorderStyle <TCell>(TCell cell)
where TCell : DataGridViewCell, ISpannedCell
{
var dataGridViewAdvancedBorderStylePlaceholder = new DataGridViewAdvancedBorderStyle();
var dataGridView = cell.DataGridView;
return(cell.AdjustCellBorderStyle(
dataGridView.AdvancedCellBorderStyle,
dataGridViewAdvancedBorderStylePlaceholder,
DataGridViewHelper.SingleVerticalBorderAdded(dataGridView),
DataGridViewHelper.SingleHorizontalBorderAdded(dataGridView),
InFirstDisplayedColumn(cell),
InFirstDisplayedRow(cell)));
}
protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
{
if (m_OwnerCell != null && m_OwnerCell.DataGridView == null)
{
m_OwnerCell = null; //owner cell was removed.
}
if (DataGridView == null ||
(m_OwnerCell == null && m_ColumnSpan == 1 && m_RowSpan == 1))
{
base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle,
paintParts);
return;
}
var ownerCell = this;
var columnIndex = ColumnIndex;
var columnSpan = m_ColumnSpan;
var rowSpan = m_RowSpan;
if (m_OwnerCell != null)
{
ownerCell = m_OwnerCell;
columnIndex = m_OwnerCell.ColumnIndex;
rowIndex = m_OwnerCell.RowIndex;
columnSpan = m_OwnerCell.ColumnSpan;
rowSpan = m_OwnerCell.RowSpan;
value = m_OwnerCell.GetValue(rowIndex);
errorText = m_OwnerCell.GetErrorText(rowIndex);
cellState = m_OwnerCell.State;
cellStyle = m_OwnerCell.GetInheritedStyle(null, rowIndex, true);
formattedValue = m_OwnerCell.GetFormattedValue(value,
rowIndex, ref cellStyle, null, null, DataGridViewDataErrorContexts.Display);
}
if (CellsRegionContainsSelectedCell(columnIndex, rowIndex, columnSpan, rowSpan))
{
cellState |= DataGridViewElementStates.Selected;
}
var cellBounds2 = DataGridViewCellExHelper.GetSpannedCellBoundsFromChildCellBounds(
this,
cellBounds,
DataGridViewHelper.SingleVerticalBorderAdded(DataGridView),
DataGridViewHelper.SingleHorizontalBorderAdded(DataGridView));
clipBounds = DataGridViewCellExHelper.GetSpannedCellClipBounds(ownerCell, cellBounds2,
DataGridViewHelper.SingleVerticalBorderAdded(DataGridView),
DataGridViewHelper.SingleHorizontalBorderAdded(DataGridView));
using (var g = DataGridView.CreateGraphics())
{
g.SetClip(clipBounds);
//Paint the content.
advancedBorderStyle = DataGridViewCellExHelper.AdjustCellBorderStyle(ownerCell);
ownerCell.NativePaint(g, clipBounds, cellBounds2, rowIndex, cellState,
value, formattedValue, errorText,
cellStyle, advancedBorderStyle,
paintParts & ~DataGridViewPaintParts.Border);
//Paint the borders.
if ((paintParts & DataGridViewPaintParts.Border) != DataGridViewPaintParts.None)
{
var leftTopCell = ownerCell;
var advancedBorderStyle2 = new DataGridViewAdvancedBorderStyle
{
Left = advancedBorderStyle.Left,
Top = advancedBorderStyle.Top,
Right = DataGridViewAdvancedCellBorderStyle.None,
Bottom = DataGridViewAdvancedCellBorderStyle.None
};
leftTopCell.PaintBorder(g, clipBounds, cellBounds2, cellStyle, advancedBorderStyle2);
var rightBottomCell = DataGridView[columnIndex + columnSpan - 1, rowIndex + rowSpan - 1] as DataGridViewTextBoxCellEx
?? this;
var advancedBorderStyle3 = new DataGridViewAdvancedBorderStyle
{
Left = DataGridViewAdvancedCellBorderStyle.None,
Top = DataGridViewAdvancedCellBorderStyle.None,
Right = advancedBorderStyle.Right,
Bottom = advancedBorderStyle.Bottom
};
rightBottomCell.PaintBorder(g, clipBounds, cellBounds2, cellStyle, advancedBorderStyle3);
}
}
}