private static Rectangle GetSpannedCellBoundsFromChildCellBounds(DataGridViewTextBoxCellEx childCell, Rectangle childCellBounds)
{
var dataGridView = childCell.DataGridView;
var ownerCell = childCell.OwnerCell == null
? childCell
: childCell.OwnerCell;
var spannedCellBounds = childCellBounds;
//
var firstVisibleColumnIndex = Enumerable.Range(ownerCell.ColumnIndex, ownerCell.ColumnSpan)
.First(i => dataGridView.Columns[i].Visible);
if (dataGridView.Columns[firstVisibleColumnIndex].Frozen)
{
spannedCellBounds.X = dataGridView.GetColumnDisplayRectangle(firstVisibleColumnIndex, false).X;
}
else
{
spannedCellBounds.X -= Enumerable.Range(firstVisibleColumnIndex, childCell.ColumnIndex - firstVisibleColumnIndex)
.Select(i => dataGridView.Columns[i])
.Where(columnItem => columnItem.Visible)
.Sum(columnItem => columnItem.Width);
}
//
var firstVisibleRowIndex = Enumerable.Range(ownerCell.RowIndex, ownerCell.RowSpan)
.First(i => dataGridView.Rows[i].Visible);
if (dataGridView.Rows[firstVisibleRowIndex].Frozen)
{
spannedCellBounds.Y = dataGridView.GetRowDisplayRectangle(firstVisibleRowIndex, false).Y;
}
else
{
spannedCellBounds.Y -= Enumerable.Range(firstVisibleRowIndex, childCell.RowIndex - firstVisibleRowIndex)
.Select(i => dataGridView.Rows[i])
.Where(rowItem => rowItem.Visible)
.Sum(rowItem => rowItem.Height);
}
//
spannedCellBounds.Width = Enumerable.Range(ownerCell.ColumnIndex, ownerCell.ColumnSpan)
.Select(i => dataGridView.Columns[i])
.Where(columnItem => columnItem.Visible)
.Sum(columnItem => columnItem.Width);
//
spannedCellBounds.Height = Enumerable.Range(ownerCell.RowIndex, ownerCell.RowSpan)
.Select(i => dataGridView.Rows[i])
.Where(rowItem => rowItem.Visible)
.Sum(rowItem => rowItem.Height);
return(spannedCellBounds);
}
private static Rectangle GetSpannedCellClipBounds(DataGridViewTextBoxCellEx ownerCell,
Rectangle cellBounds)
{
DataGridView dataGridView = ownerCell.DataGridView;
var clipBounds = cellBounds;
//Setting X.
foreach (int i in Enumerable.Range(ownerCell.ColumnIndex, ownerCell.m_ColumnSpan))
{
var columnItem = dataGridView.Columns[i];
if (!columnItem.Visible)
{
continue;
}
if (columnItem.Frozen ||
i > dataGridView.FirstDisplayedScrollingColumnIndex)
{
break;
}
if (i == dataGridView.FirstDisplayedScrollingColumnIndex)
{
clipBounds.X += dataGridView.FirstDisplayedScrollingColumnHiddenWidth;
break;
}
clipBounds.X += columnItem.Width;
}
//Setting Width.
clipBounds.Width = Enumerable.Range(ownerCell.ColumnIndex, ownerCell.m_ColumnSpan)
.Sum(i =>
{
var columnItem = dataGridView.Columns[i];
if (!columnItem.Visible)
{
return(0);
}
if (columnItem.Frozen ||
i > dataGridView.FirstDisplayedScrollingColumnIndex)
{
return(columnItem.Width);
}
if (i == dataGridView.FirstDisplayedScrollingColumnIndex)
{
return(columnItem.Width
- dataGridView.FirstDisplayedScrollingColumnHiddenWidth);
}
return(0);
});
//Setting Y.
foreach (var i in Enumerable.Range(ownerCell.RowIndex, ownerCell.m_RowSpan))
{
var rowItem = dataGridView.Rows[i];
if (!rowItem.Visible)
{
continue;
}
if (rowItem.Frozen ||
i >= dataGridView.FirstDisplayedScrollingRowIndex)
{
break;
}
clipBounds.Y += rowItem.Height;
}
//Setting Height.
clipBounds.Height = Enumerable.Range(ownerCell.RowIndex, ownerCell.m_RowSpan)
.Sum(i =>
{
var rowItem = dataGridView.Rows[i];
if (!rowItem.Visible)
{
return(0);
}
if (rowItem.Frozen ||
i >= dataGridView.FirstDisplayedScrollingRowIndex)
{
return(dataGridView.Rows[i].Height);
}
return(0);
});
//exclude borders.
if (dataGridView.BorderStyle != BorderStyle.None)
{
var clientRectangle = dataGridView.ClientRectangle;
clientRectangle.Width--;
clientRectangle.Height--;
clipBounds.Intersect(clientRectangle);
}
return(clipBounds);
}
protected override void Paint(System.Drawing.Graphics graphics, System.Drawing.Rectangle clipBounds, System.Drawing.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;
}
cellBounds = GetSpannedCellBoundsFromChildCellBounds(this, cellBounds);
clipBounds = GetSpannedCellClipBounds(ownerCell, cellBounds);
using (var g = DataGridView.CreateGraphics())
{
g.SetClip(clipBounds);
//Paint the content.
ownerCell.InternalPaint(g, clipBounds, cellBounds, rowIndex, cellState,
value, formattedValue, errorText,
cellStyle, advancedBorderStyle,
paintParts & ~DataGridViewPaintParts.Border);
//Paint the borders.
if ((paintParts & DataGridViewPaintParts.Border) != DataGridViewPaintParts.None)
{
var leftTopCell = ownerCell;
DataGridViewAdvancedBorderStyle advancedBorderStyle2 = new DataGridViewAdvancedBorderStyle()
{
Left = advancedBorderStyle.Left,
Top = advancedBorderStyle.Top,
Right = DataGridViewAdvancedCellBorderStyle.None,
Bottom = DataGridViewAdvancedCellBorderStyle.None
};
leftTopCell.PaintBorder(g, clipBounds, cellBounds, cellStyle, advancedBorderStyle2);
var rightBottomCell = DataGridView[columnIndex + columnSpan - 1, rowIndex + rowSpan - 1] as DataGridViewTextBoxCellEx;
if (rightBottomCell == null)
{
rightBottomCell = this;
}
DataGridViewAdvancedBorderStyle advancedBorderStyle3 = new DataGridViewAdvancedBorderStyle()
{
Left = DataGridViewAdvancedCellBorderStyle.None,
Top = DataGridViewAdvancedCellBorderStyle.None,
Right = advancedBorderStyle.Right,
Bottom = advancedBorderStyle.Bottom
};
rightBottomCell.PaintBorder(g, clipBounds, cellBounds, cellStyle, advancedBorderStyle3);
}
}
}