computeActualPageFormat method
      
PdfPageFormat
computeActualPageFormat()
      
     
    
    
Implementation
PdfPageFormat computeActualPageFormat() {
  var format = previewData.pageFormat;
  final pages = previewWidget.currentState?.pages ?? const [];
  final dpi = previewWidget.currentState?.dpi ?? PdfPageFormat.inch;
  if (!widget.canChangePageFormat && pages.isNotEmpty) {
    format = PdfPageFormat(
      pages.first.width * PdfPageFormat.inch / dpi,
      pages.first.height * PdfPageFormat.inch / dpi,
      marginAll: 5 * PdfPageFormat.mm,
    );
  }
  return format;
}