PurplePen.MapUtil.GetDefaultPageSize C# (CSharp) Method

        public static void GetDefaultPageSize(RectangleF printAreaRectangle, float printScaleRatio, out int pageWidth, out int pageHeight, out int pageMargin, out bool landscape)
        {
            bool metric = RegionInfo.CurrentRegion.IsMetric;

            if (printAreaRectangle.IsEmpty) {
                PaperSize paperSize = StandardPaperSizes[metric ? DefaultMetricPaperSizeindex : DefaultEnglighPaperSizeIndex];
                pageWidth = paperSize.Width;
                pageHeight = paperSize.Height;
                pageMargin = 0;
                landscape = false;
            }
            else {
                landscape = printAreaRectangle.Width > printAreaRectangle.Height;
                // Get needed page width and height in 1/100 of inch.
                float printAreaWidth = (landscape ? printAreaRectangle.Height : printAreaRectangle.Width) / printScaleRatio * 100 / 25.4F;
                float printAreaHeight = (landscape ? printAreaRectangle.Width : printAreaRectangle.Height) / printScaleRatio * 100 / 25.4F;

                int firstIndex = metric ? 0 : FirstEnglishPaperSizeIndex;
                int endIndex = metric ? FirstEnglishPaperSizeIndex : StandardPaperSizes.Length;
                int bestIndex = -1;

                // Scan through all paper indexes to find the smallest paper that fits the area.
                for (int i = firstIndex; i < endIndex; ++i) {
                    if (StandardPaperSizes[i].Width > printAreaWidth && StandardPaperSizes[i].Height > printAreaHeight &&
                        (bestIndex == -1 || StandardPaperSizes[i].Width < StandardPaperSizes[bestIndex].Width))
                        bestIndex = i;
                }
                if (bestIndex < 0)
                    bestIndex = metric ? DefaultMetricPaperSizeindex : DefaultEnglighPaperSizeIndex;

                pageWidth = StandardPaperSizes[bestIndex].Width;
                pageHeight = StandardPaperSizes[bestIndex].Height;

                // Use the default margin if it can fit, otherwise 0 margin.
                int defaultMargin = metric ? DefaultMetricMargin : DefaultEnglishMargin;
                if (pageWidth - printAreaWidth > defaultMargin * 2 &&
                    pageHeight - printAreaHeight > defaultMargin * 2) {
                    pageMargin = defaultMargin;
                }
                else {
                    pageMargin = 0;
                }
            }
        }

        void NewEventPaperSize_Load(object sender, EventArgs e)
        {
            containingWizard = (NewEventWizard)Parent;

            RectangleF printArea       = containingWizard.mapBounds;
            float      printScaleRatio = containingWizard.DefaultPrintScale / containingWizard.MapScale;

            // Set the default page setting from the map size and print scale.
            int  pageWidth, pageHeight, pageMargin;
            bool landscape;

            MapUtil.GetDefaultPageSize(printArea, printScaleRatio, out pageWidth, out pageHeight, out pageMargin, out landscape);
            paperSizeControl.PaperSize  = new System.Drawing.Printing.PaperSize("", pageWidth, pageHeight);
            paperSizeControl.MarginSize = pageMargin;
            paperSizeControl.Landscape  = landscape;
        }