protected override void OnColumnAdded(DataGridViewColumnEventArgs e)
{
AxHeaderCell header = new AxHeaderCell();
//if ( e.Column.Index == 1 )
// header.ColumnSpan = 2;
//header.
header.Value = e.Column.HeaderCell.Value;
e.Column.HeaderCell = header;
base.OnColumnAdded(e);
}
protected override void OnPaint(PaintEventArgs e)
{
Stopwatch sw = new Stopwatch();
sw.Start();
BufferedGraphicsContext context;
BufferedGraphics buffer;
context = BufferedGraphicsManager.Current;
buffer = context.Allocate(e.Graphics, ClientRectangle);
Graphics current = buffer.Graphics; // e.Graphics;//
current.FillRectangle(new SolidBrush(_normalStyle.BackColor), ClientRectangle);
//current.DrawRectangle( new Pen( _normalStyle.BorderColor ), ClientRectangle.X, ClientRectangle.Y, ClientRectangle.Width - 1, ClientRectangle.Height - 1 );
#region "Заголовки столбцов"
Rectangle totalHeaderRect = new Rectangle(ClientRectangle.X, ClientRectangle.Y, ClientRectangle.Width - 1, ColumnHeadersHeight);
SolidBrush brush = new SolidBrush(ColumnHeadersDefaultCellStyle.BackColor);
current.FillRectangle(brush, totalHeaderRect);
//current.DrawRectangle( new Pen( NormalStyle.BorderColor ), totalHeaderRect );
//current.DrawLine( new Pen( NormalStyle.BorderColor ), totalHeaderRect.X, totalHeaderRect.Bottom, totalHeaderRect.Right, totalHeaderRect.Bottom );
int currentSpan = 0;
for (int j = 0; j < ColumnCount; j++)
{
Rectangle rect = GetCellDisplayRectangle(j, -1, true);
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
format.Trimming = StringTrimming.EllipsisPath;
AxHeaderCell header = ( AxHeaderCell )Columns[j].HeaderCell;
int firstVisibleColumnIndex = -1;
if (FirstDisplayedCell != null)
{
firstVisibleColumnIndex = FirstDisplayedCell.ColumnIndex;
}
int horizontalScrollOffset = 0;
if (rect.Width < Columns[j].Width && firstVisibleColumnIndex > -1 && firstVisibleColumnIndex == j)
{
horizontalScrollOffset = Columns[j].Width - rect.Width;
}
if (header.ColumnSpan > 1 && Columns[j].Displayed)
{
currentSpan = header.ColumnSpan;
int spanWidth = 0;
for (int columnIndex = Columns[j].Index; columnIndex < Columns[j].Index + currentSpan; columnIndex++)
{
spanWidth += Columns[columnIndex].Width;
}
Rectangle spanRect = new Rectangle(rect.X - horizontalScrollOffset, rect.Y - 1, spanWidth, rect.Height / 2);
current.DrawRectangle(new Pen(NormalStyle.BorderColor), spanRect);
current.DrawString(
(( AxHeaderCell )Columns[j].HeaderCell).ColumnSpanText,
Font,
new SolidBrush(Color.Black),
spanRect, format);
}
if (currentSpan > 0)
{
rect = new Rectangle(rect.X - horizontalScrollOffset, rect.Y + rect.Height / 2, Columns[j].Width, rect.Height / 2);
currentSpan--;
}
else
{
rect = new Rectangle(rect.X - horizontalScrollOffset, rect.Y, Columns[j].Width, rect.Height);
}
if (Columns[j].Displayed)
{
if (Columns[j].Selected)
{
current.FillRectangle(new SolidBrush(DefaultCellStyle.SelectionBackColor), rect);
}
//current.DrawRectangle( new Pen( NormalStyle.BorderColor ), rect );
current.DrawLine(new Pen(NormalStyle.BorderColor), rect.Right, rect.Top, rect.Right, rect.Bottom);
current.DrawString(Columns[j].HeaderText,
Font,
new SolidBrush(NormalStyle.ForeColor),
rect,
format);
}
}
#endregion
#region "Ячейки"
if (FirstDisplayedCell != null)
{
var visibleRowsCount = DisplayedRowCount(true);
var firstDisplayedCellRowIndex = FirstDisplayedCell.RowIndex;
var cellColumnIndex = FirstDisplayedCell.ColumnIndex;
var lastvisibleRowIndex = (firstDisplayedCellRowIndex + visibleRowsCount);
//Console.WriteLine( "firstDisplayedCellRowIndex: " + firstDisplayedCellRowIndex );
//Console.WriteLine( "lastvisibleRowIndex: " + lastvisibleRowIndex );
List <Rectangle> selectedCellsBuffer = new List <Rectangle>();
for (int x = cellColumnIndex; x < ColumnCount; x++)
{
for (int y = firstDisplayedCellRowIndex; y < lastvisibleRowIndex; y++)
{
Rectangle rect = GetCellDisplayRectangle(x, y, false);
Rectangle textRect = new Rectangle(rect.X + 1, rect.Y + 1, Columns[x].Width - 1, rect.Height - 1);
Rectangle fillRect = new Rectangle(rect.X + 1, rect.Y + 1, rect.Width - 1, rect.Height - 1);
if (Rows[y].Cells[x].Selected)
{
selectedCellsBuffer.Add(rect);
current.FillRectangle(new SolidBrush(DefaultCellStyle.SelectionBackColor), fillRect);
current.DrawLine(new Pen(DefaultCellStyle.SelectionBackColor.Lighten(10)), rect.Left, rect.Bottom - 1, rect.Right + 1, rect.Bottom - 1);
current.DrawLine(new Pen(DefaultCellStyle.SelectionBackColor.Lighten(10)), rect.Left, rect.Top + 1, rect.Right + 1, rect.Top + 1);
}
else
{
current.FillRectangle(new SolidBrush(DefaultCellStyle.BackColor), fillRect);
}
//else {
current.DrawRectangle(new Pen(NormalStyle.BorderColor), rect);
//}
if (y > -1 && x > -1 && Rows[y].Cells[x].Value != null && Rows[y].Cells[x].Displayed)
{
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
format.FormatFlags = StringFormatFlags.NoWrap;
//format.
current.DrawString(
Rows[y].Cells[x].Value.ToString(),
Font,
new SolidBrush(Color.Black),
textRect, format);
}
}
if (!Rows[firstDisplayedCellRowIndex].Cells[x].Displayed)
{
break;
}
}
foreach (Rectangle rect in selectedCellsBuffer)
{
//current.DrawRectangle( new Pen( Color.Red ), rect );
}
}
#endregion
#region "Заголовки строк"
if (RowHeadersVisible)
{
current.FillRectangle(new SolidBrush(ColumnHeadersDefaultCellStyle.BackColor), ClientRectangle.X, ClientRectangle.Y, RowHeadersWidth, ClientRectangle.Height - 1);
if (FirstDisplayedCell != null)
{
var firstDisplayedCellRowIndex = FirstDisplayedCell.RowIndex;
for (int j = firstDisplayedCellRowIndex; j < firstDisplayedCellRowIndex + DisplayedRowCount(true); j++)
{
Rectangle rowRect = GetCellDisplayRectangle(-1, j, true);
if (Rows[j].Selected)
{
Rectangle selectedRowRect = new Rectangle(rowRect.X + 2, rowRect.Y + 2, rowRect.Width - 3, rowRect.Height - 3);
/*current.FillRectangle( new SolidBrush( DefaultCellStyle.SelectionBackColor.Darken( 20 ) ), selectedRowRect );*/
Point[] points =
{
new Point(selectedRowRect.X + selectedRowRect.Width - 2 - 5, selectedRowRect.Y + selectedRowRect.Height / 2 - 4),
new Point(selectedRowRect.X + selectedRowRect.Width - 2 + 0, selectedRowRect.Y + selectedRowRect.Height / 2),
new Point(selectedRowRect.X + selectedRowRect.Width - 2 - 5, selectedRowRect.Y + selectedRowRect.Height / 2 + 4)
};
current.SmoothingMode = SmoothingMode.HighQuality;
//current.FillPolygon( new SolidBrush( _normalStyle.ForeColor.SetAlpha( 50 ) ), points );
current.DrawPolygon(new Pen(_normalStyle.ForeColor.SetAlpha(150)), points);
}
if (j == firstDisplayedCellRowIndex)
{
current.DrawLine(new Pen(NormalStyle.BorderColor), rowRect.Left, rowRect.Top, ClientRectangle.Width, rowRect.Top);
}
current.DrawLine(new Pen(NormalStyle.BorderColor), rowRect.Left, rowRect.Bottom, ClientRectangle.Width, rowRect.Bottom);
}
}
}
//for ( int j = 0 ; j < DisplayedRowCount( true ) ; j++ ) {
// Rectangle rowRect = GetCellDisplayRectangle( -1, j, true );
//}
#endregion
if (RowHeadersVisible)
{
current.DrawLine(new Pen(_normalStyle.BorderColor), RowHeadersWidth + 1, ClientRectangle.Y, RowHeadersWidth + 1, ColumnHeadersHeight);
}
current.DrawRectangle(new Pen(_normalStyle.BorderColor), ClientRectangle.X, ClientRectangle.Y, ClientRectangle.Width - 1, ClientRectangle.Height - 1);
buffer.Render();
sw.Stop();
Console.WriteLine("Grid render: " + sw.ElapsedMilliseconds);
}
