/// <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); } }