PDFOffice_Windows_exe/PDF Office/CustomControl/ScanViewControl/CustomDraw.cs

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;

namespace PDF_Master.CustomControl.ScanViewControl
{
    public class CustomDraw : DrawingVisual
    {
        public Rect PaintRect;
        public Rect RawRect;
        public string PaintText;
        public double FontSize = 0;
        private Pen DrawPen;
        private SolidColorBrush CoverBrush = Brushes.Transparent;// new SolidColorBrush(Color.FromArgb(0x01, 0xFF, 0xFF, 0xFF));
        public CustomDraw()
        {
            DrawPen = new Pen(Brushes.Red, 1);
        }

        public void Draw()
        {
            DrawingContext dc = RenderOpen();
            dc.DrawRectangle(null, DrawPen, PaintRect);
            if (string.IsNullOrEmpty(PaintText) == false)
            {
                double fontSize = 1;
                FormattedText formatText = new FormattedText(PaintText,
                    CultureInfo.CurrentCulture,
                    FlowDirection.LeftToRight,
                    new Typeface(new FontFamily("Arial"), FontStyles.Normal, FontWeights.Normal, FontStretches.Normal),
                    fontSize,
                    Brushes.Green, Helper.DpiHelpers.Dpi / 96F);
                while (formatText.Width + fontSize < PaintRect.Width && formatText.Height < PaintRect.Height)
                {
                    fontSize += 1;
                    formatText.SetFontSize(fontSize);
                }
                if (fontSize > 1)
                {
                    formatText.SetFontSize(fontSize - 1);
                }
                FontSize = fontSize;
                dc.DrawRectangle(Brushes.White, null, PaintRect);
                Array x = PaintText.ToCharArray();
                double w = 0;

                List<FormattedText> drawFormatList = new List<FormattedText>();
                for (int i = 0; i < x.Length; i++)
                {
                    FormattedText formatText1 = new FormattedText(x.GetValue(i).ToString(),
                    CultureInfo.CurrentCulture,
                    FlowDirection.LeftToRight,
                    new Typeface(new FontFamily("Arial"), FontStyles.Normal, FontWeights.Normal, FontStretches.Normal),
                    fontSize,
                    Brushes.Green, Helper.DpiHelpers.Dpi / 96F);
                    formatText1.SetFontSize(fontSize);
                    w += formatText1.Width;
                    drawFormatList.Add(formatText1);
                }

                Point startPos = new Point(PaintRect.Left, (int)(PaintRect.Top));
                double subLength = PaintRect.Width - w;
                double offset = subLength / x.Length;

                foreach (FormattedText subFormat in drawFormatList)
                {
                    dc.DrawText(subFormat, startPos);
                    startPos.X += subFormat.Width + offset;
                }

            }
            dc.Close();
        }

        public void DrawBounds()
        {
            DrawingContext dc = RenderOpen();
            dc.DrawRectangle(CoverBrush, DrawPen, PaintRect);
            dc.Close();
        }
    }
}