/// <summary>
/// Draw centred text
/// </summary>
/// <param name="context">The graphics context to draw on</param>
/// <param name="text">The text to draw</param>
/// <param name="point">The point to centre the text around</param>
protected void DrawCentredText(IDrawContext context, string text, Point point)
{
(int left, int top, int width, int height) = context.GetPixelExtents(text, false, false);
double x = point.X - (width / 2 + left);
double y = point.Y - (height / 2 + top);
context.MoveTo(x, y);
context.DrawText(text, false, false);
}
/// <summary>Calculte the column widths in pixels.</summary>
/// <param name="cr">The current draing context.</param>
private void CalculateColumnWidths(IDrawContext cr)
{
ColumnWidths = new int[DataProvider.ColumnCount];
for (int columnIndex = 0; columnIndex < DataProvider.ColumnCount; columnIndex++)
{
int columnWidth = 0;
for (int rowIndex = 0; rowIndex < NumberFrozenRows + 1; rowIndex++)
{
var text = DataProvider.GetCellContents(columnIndex, rowIndex);
if (text == null)
{
text = string.Empty;
}
var rectangle = cr.GetPixelExtents(text, true, false);
columnWidth = Math.Max(columnWidth, rectangle.Width);
}
ColumnWidths[columnIndex] = columnWidth + ColumnPadding * 2;
}
}
/// <summary>Draw a single cell to the context.</summary>
/// <param name="cr">The context to draw in.</param>
/// <param name="columnIndex">The column index.</param>
/// <param name="rowIndex">The row index.</param>
private void DrawCell(IDrawContext cr, int columnIndex, int rowIndex)
{
try
{
var text = DataProvider.GetCellContents(columnIndex, rowIndex);
var cellBounds = CalculateBounds(columnIndex, rowIndex);
if (cellBounds != null)
{
if (text == null)
{
text = string.Empty;
}
cr.Rectangle(cellBounds.Clip(Width - 20, Height).ToRectangle());
cr.Clip();
cr.SetLineWidth(lineWidth);
cr.Rectangle(cellBounds.ToRectangle());
if (CellPainter.PaintCell(columnIndex, rowIndex))
{
// Draw the filled in cell.
cr.State = CellPainter.GetCellState(columnIndex, rowIndex);
cr.DrawFilledRectangle(cellBounds.Left, cellBounds.Top, cellBounds.Width - 5, cellBounds.Height - 5);
// Draw cell outline.
if (ShowLines)
{
cr.Rectangle(cellBounds.ToRectangle());
cr.Stroke();
}
// Measure text for cell.
var r = cr.GetPixelExtents(text,
CellPainter.TextBold(columnIndex, rowIndex),
CellPainter.TextItalics(columnIndex, rowIndex));
// Vertically center the text.
double y = cellBounds.Top + (cellBounds.Height - r.Height) / 2;
// Horizontal alignment is determined by the cell painter.
double x;
if (CellPainter.TextLeftJustify(columnIndex, rowIndex))
{
x = cellBounds.Left + ColumnPadding;
}
else
{
x = cellBounds.Right - ColumnPadding - r.Width;
}
cr.MoveTo(x, y);
cr.DrawText(text, CellPainter.TextBold(columnIndex, rowIndex),
CellPainter.TextItalics(columnIndex, rowIndex));
}
cr.ResetClip();
cr.State = States.Normal;
}
}
catch (Exception ex)
{
MainView.MasterView.ShowError(ex);
}
}