drawString method Null safety

void drawString(
  1. String s,
  2. PdfFont font,
  3. {PdfPen? pen,
  4. PdfBrush? brush,
  5. Rect? bounds,
  6. PdfStringFormat? format}
)

Draws the specified text string at the specified location.

//Creates a new PDF document.
PdfDocument doc = PdfDocument()
  ..pages
      .add()
      .graphics
      //Draw string to PDF page graphics.
      .drawString(
          'Hello world!',
          PdfStandardFont(PdfFontFamily.helvetica, 12,
              style: PdfFontStyle.bold),
          bounds: Rect.fromLTWH(0, 0, 200, 50),
          brush: PdfBrushes.red,
          pen: PdfPens.blue,
          format: PdfStringFormat(alignment: PdfTextAlignment.left));
//Saves the document.
List<int> bytes = doc.save();
//Dispose the document.
doc.dispose();

Implementation

void drawString(String s, PdfFont font,
    {PdfPen? pen, PdfBrush? brush, Rect? bounds, PdfStringFormat? format}) {
  _Rectangle layoutRectangle;
  if (bounds != null) {
    layoutRectangle = _Rectangle.fromRect(bounds);
  } else {
    layoutRectangle = _Rectangle.empty;
  }
  if (pen == null && brush == null) {
    brush = PdfSolidBrush(PdfColor(0, 0, 0));
  }
  _layoutString(s, font,
      pen: pen,
      brush: brush,
      layoutRectangle: layoutRectangle,
      format: format);
}