protected override void OnPrintPage(PrintPageEventArgs e)
{
base.OnPrintPage(e);
if (m_PageCount == 0)
{
m_HeaderHeight = this.GetHeaderHeight(e.Graphics);
m_TitleHeight = this.GetTitleHeight(e.Graphics);
m_FooterHeight = this.GetFooterHeight(e.Graphics);
m_PageCount = this.PrecalculatePageCount(e);
m_PageNo = 1;
}
if (m_RangeToPrint.IsEmpty())
{
return;
}
if (m_BorderPen == null)
{
m_BorderPen = new Pen(Color.Black);
}
RectangleF area = new RectangleF(e.MarginBounds.Left,
e.MarginBounds.Top + m_HeaderHeight + (m_NextRowToPrint == RangeToPrint.Start.Row ? m_TitleHeight : 0),
e.MarginBounds.Width,
e.MarginBounds.Height - m_HeaderHeight - (m_NextRowToPrint == RangeToPrint.Start.Row ? m_TitleHeight : 0) - m_FooterHeight);
this.DrawHeader(e.Graphics, new RectangleF(e.MarginBounds.Left, e.MarginBounds.Top, e.MarginBounds.Width, m_HeaderHeight),
m_PageNo, m_PageCount);
if (m_PageNo == 1)
{
this.DrawTitle(e.Graphics, new RectangleF(e.MarginBounds.Left, e.MarginBounds.Top + m_HeaderHeight, e.MarginBounds.Width, m_TitleHeight),
m_PageNo, m_PageCount);
}
List <int> columnHasTopBorder = new List <int>();
List <int> rowHasLeftBorder = new List <int>();
RangeCollection printedRanges = new RangeCollection();
int pageFirstRow = m_NextRowToPrint;
int pageFirstColumn = m_NextColumnToPrint;
int pageLastColumn = RangeToPrint.End.Column;
// Pre-calculate width of the table in current page
float pageColumnWidth = 0;
for (int i = m_NextColumnToPrint; i <= RangeToPrint.End.Column; i++)
{
float colWidth = this.GetColumnWidth(e.Graphics, i);
if (i == m_NextColumnToPrint && colWidth > area.Width)
{
colWidth = area.Width;
}
if (pageColumnWidth + colWidth <= area.Width)
{
pageColumnWidth += colWidth;
}
else
{
break;
}
}
// Support for fixed row repeat
if (RepeatFixedRows && m_Grid.ActualFixedRows > RangeToPrint.Start.Row)
{
m_NextRowToPrint = RangeToPrint.Start.Row;
}
float curY = area.Top;
while (m_NextRowToPrint <= RangeToPrint.End.Row)
{
// If repeated rows are printed, resume printing next rows
if (RepeatFixedRows && m_NextRowToPrint >= m_Grid.ActualFixedRows && m_NextRowToPrint < pageFirstRow)
{
m_NextRowToPrint = pageFirstRow;
}
float rowHeight = this.GetRowHeight(e.Graphics, m_NextRowToPrint);
// Check if row fits in current page
if (curY + rowHeight > area.Bottom)
{
break;
}
float curX = area.Left;
while (m_NextColumnToPrint <= pageLastColumn)
{
float colWidth = this.GetColumnWidth(e.Graphics, m_NextColumnToPrint);
// Check if column fits in current page
if (curX + colWidth > area.Right)
{
// If single column does not fit in page, force it
if (m_NextColumnToPrint == pageFirstColumn)
{
colWidth = area.Right - curX;
}
else
{
pageLastColumn = m_NextColumnToPrint - 1;
break;
}
}
RectangleF cellRectangle;
Position pos = new Position(m_NextRowToPrint, m_NextColumnToPrint);
GridRange range = m_Grid.PositionToCellRange(pos);
// Check if cell is spanned
if (range.ColumnsCount > 1 || range.RowsCount > 1)
{
Size rangeSize = m_Grid.RangeToSize(range);
// Is the first position, draw allways
if (range.Start == pos)
{
cellRectangle = new RectangleF(curX, curY, rangeSize.Width, rangeSize.Height);
printedRanges.Add(range);
}
else
{
// Draw only if this cell is not already drawn on current page
if (!printedRanges.ContainsCell(pos))
{
// Calculate offset
float sX = curX;
for (int i = pos.Column - 1; i >= range.Start.Column; i--)
{
float cw = this.GetColumnWidth(e.Graphics, i);
sX -= cw;
}
float sY = curY;
for (int i = pos.Row - 1; i >= range.Start.Row; i--)
{
float cw = this.GetRowHeight(e.Graphics, i);
sY -= cw;
}
cellRectangle = new RectangleF(sX, sY, rangeSize.Width, rangeSize.Height);
printedRanges.Add(range);
}
else
{
cellRectangle = RectangleF.Empty;
}
}
}
else
{
cellRectangle = new RectangleF(curX, curY, colWidth, rowHeight);
}
if (!cellRectangle.IsEmpty)
{
SourceGrid.Cells.ICellVirtual cell = this.m_Grid.GetCell(pos);
if (cell != null)
{
CellContext ctx = new CellContext(m_Grid, pos, cell);
RectangleF clip = new RectangleF(Math.Max(cellRectangle.Left, area.Left),
Math.Max(cellRectangle.Top, area.Top),
Math.Min(cellRectangle.Right, area.Left + pageColumnWidth) - Math.Max(cellRectangle.Left, area.Left),
Math.Min(cellRectangle.Bottom, area.Bottom) - Math.Max(cellRectangle.Top, area.Top));
Region prevClip = e.Graphics.Clip;
try
{
e.Graphics.Clip = new Region(clip);
this.DrawCell(e.Graphics, ctx, cellRectangle);
}
finally
{
// Restore clip region
e.Graphics.Clip = prevClip;
}
// Check if left border can be drawn in current page
if (!ContainsInRange(rowHasLeftBorder, range.Start.Row, range.End.Row) &&
cellRectangle.Left >= area.Left)
{
e.Graphics.DrawLine(m_BorderPen, cellRectangle.Left, clip.Top, cellRectangle.Left, clip.Bottom);
AddRange(rowHasLeftBorder, range.Start.Row, range.End.Row);
}
// Check if top border can be drawn in current page
if (!ContainsInRange(columnHasTopBorder, range.Start.Column, range.End.Column) &&
cellRectangle.Top >= area.Top)
{
e.Graphics.DrawLine(m_BorderPen, clip.Left, cellRectangle.Top, clip.Right, cellRectangle.Top);
AddRange(columnHasTopBorder, range.Start.Column, range.End.Column);
}
// Check if right border can be drawn in current page
if (cellRectangle.Right <= area.Right)
{
e.Graphics.DrawLine(m_BorderPen, cellRectangle.Right, clip.Top, cellRectangle.Right, clip.Bottom);
}
// Check if bottom border can be drawn in current page
if (cellRectangle.Bottom <= area.Bottom)
{
e.Graphics.DrawLine(m_BorderPen, clip.Left, cellRectangle.Bottom, clip.Right, cellRectangle.Bottom);
}
}
}
// Set next column position
curX += colWidth;
m_NextColumnToPrint++;
}
// Set next row Y position
curY += rowHeight;
m_NextRowToPrint++;
m_NextColumnToPrint = pageFirstColumn;
}
// If we have not reached last column, we will continue on next page
if (pageLastColumn != RangeToPrint.End.Column)
{
m_NextRowToPrint = pageFirstRow;
m_NextColumnToPrint = pageLastColumn + 1;
}
else
{
m_NextColumnToPrint = RangeToPrint.Start.Column;
}
this.DrawFooter(e.Graphics, new RectangleF(e.MarginBounds.Left, e.MarginBounds.Bottom - m_FooterHeight, e.MarginBounds.Width, m_FooterHeight),
m_PageNo, m_PageCount);
// If we have not reached last row we will continue on next page
e.HasMorePages = (m_NextRowToPrint <= RangeToPrint.End.Row);
// If there are no more pages, release resources
if (e.HasMorePages)
{
m_PageNo++;
}
}
public virtual void Export(GridVirtual grid, System.Drawing.Graphics graphics,
GridRange rangeToExport, System.Drawing.Point destinationLocation)
{
if (rangeToExport.IsEmpty())
{
return;
}
System.Drawing.Point cellPoint = destinationLocation;
using (DevAge.Drawing.GraphicsCache graphicsCache = new DevAge.Drawing.GraphicsCache(graphics))
{
for (int r = rangeToExport.Start.Row; r <= rangeToExport.End.Row; r++)
{
int rowHeight = grid.Rows.GetHeight(r);
for (int c = rangeToExport.Start.Column; c <= rangeToExport.End.Column; c++)
{
Rectangle cellRectangle;
Position pos = new Position(r, c);
Size cellSize = new Size(grid.Columns.GetWidth(c), rowHeight);
GridRange range = grid.PositionToCellRange(pos);
//support for RowSpan or ColSpan
//Note: for now I draw only the merged cell at the first position
// (this can cause a problem if you export partial range that contains a partial merged cells)
if (range.ColumnsCount > 1 || range.RowsCount > 1)
{
//Is the first position
if (range.Start == pos)
{
Size rangeSize = grid.RangeToSize(range);
cellRectangle = new Rectangle(cellPoint,
rangeSize);
}
else
{
cellRectangle = Rectangle.Empty;
}
}
else
{
cellRectangle = new Rectangle(cellPoint, cellSize);
}
if (cellRectangle.IsEmpty == false)
{
Cells.ICellVirtual cell = grid.GetCell(pos);
CellContext context = new CellContext(grid, pos, cell);
ExportCell(context, graphicsCache, cellRectangle);
}
cellPoint = new Point(cellPoint.X + cellSize.Width, cellPoint.Y);
}
cellPoint = new Point(destinationLocation.X, cellPoint.Y + rowHeight);
}
}
}
