using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Diagnostics;

 using System.Linq;

 using System.Text;

 using System.Threading.Tasks;

 //using System.Timers;

 using System.Windows.Forms;

 using System.Drawing;

 namespace SharpDisplayManager

 {

     class MarqueeLabel : Label

     {

         private bool iOwnTimer;

         private StringFormat iStringFormat;

         private SolidBrush iBrush;

         private SizeF iTextSize;

         private SizeF iSeparatorSize;

         [Category("Appearance")]

         [Description("Separator in our scrolling loop.")]

         [DefaultValue(" | ")]

         [Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]

         public string Separator { get; set; }

         [Category("Behavior")]

         [Description("How fast is our text scrolling, in pixels per second.")]

         [DefaultValue(32)]

         [Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]

         public int PixelsPerSecond { get; set; }

         [Category("Behavior")]

         [Description("Use an internal or an external timer.")]

         [DefaultValue(true)]

         [Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]

         public bool OwnTimer

         {

             get

             {

                 return iOwnTimer;

             }

             set

             {

                 iOwnTimer = value;

                 if (iOwnTimer)

                 {

                     Timer = new Timer();

                     Timer.Interval = 10;

                     Timer.Tick += new EventHandler(Timer_Tick);

                     Timer.Start();

                 }

                 else

                 {

                     if (Timer != null)

                         Timer.Dispose();

                     Timer = null;

                 }

             }

         }

         private int CurrentPosition { get; set; }

         private Timer Timer { get; set; }

         private DateTime LastTickTime { get; set; }

         private double PixelsLeft { get; set; }

         //DateTime a = new DateTime(2010, 05, 12, 13, 15, 00);

         //DateTime b = new DateTime(2010, 05, 12, 13, 45, 00);

         //Console.WriteLine(b.Subtract(a).TotalMinutes);

         public MarqueeLabel()

         {

             UseCompatibleTextRendering = true;

             //PixelsPerSecond = 32;

             LastTickTime = DateTime.Now;

             PixelsLeft = 0;

             iBrush = new SolidBrush(ForeColor);

         }

         public void UpdateAnimation(DateTime aLastTickTime, DateTime aNewTickTime)

         {

             if (!NeedToScroll())

             {

                 CurrentPosition = 0;

                 return;

             }

             while (CurrentPosition > (iTextSize.Width + iSeparatorSize.Width))

             {

                 CurrentPosition -= ((int)(iTextSize.Width + iSeparatorSize.Width));

             }

             PixelsLeft += aNewTickTime.Subtract(aLastTickTime).TotalSeconds * PixelsPerSecond;

             //Keep track of our pixels left over

             //PixelsLeft = offset - Math.Truncate(offset);

             double offset = Math.Truncate(PixelsLeft);

             PixelsLeft -= offset;

             CurrentPosition += Convert.ToInt32(offset);

             /*

             if (offset > 1.0)

             {

                 BackColor = Color.Red;

             }

             else if (offset==1.0)

             {

                 if (BackColor != Color.White)

                 {

                     BackColor = Color.White;

                 }

             }

             else

             {

                 //Too slow

                 //BackColor = Color.Green;

             }*/

             //Only redraw if something has changed

             if (offset != 0)

             {

                 Invalidate();

             }

         }

         void Timer_Tick(object sender, EventArgs e)

         {

             DateTime NewTickTime = DateTime.Now;

             //

             UpdateAnimation(LastTickTime, NewTickTime);

             //

             LastTickTime = NewTickTime;

         }

         private StringFormat GetStringFormatFromContentAllignment(ContentAlignment ca)

         {

             StringFormat format = new StringFormat();

             switch (ca)

             {

                 case ContentAlignment.TopCenter:

                     format.Alignment = StringAlignment.Near;

                     format.LineAlignment = StringAlignment.Center;

                     break;

                 case ContentAlignment.TopLeft:

                     format.Alignment = StringAlignment.Near;

                     format.LineAlignment = StringAlignment.Near;

                     break;

                 case ContentAlignment.TopRight:

                     format.Alignment = StringAlignment.Near;

                     format.LineAlignment = StringAlignment.Far;

                     break;

                 case ContentAlignment.MiddleCenter:

                     format.Alignment = StringAlignment.Center;

                     format.LineAlignment = StringAlignment.Center;

                     break;

                 case ContentAlignment.MiddleLeft:

                     format.Alignment = StringAlignment.Center;

                     format.LineAlignment = StringAlignment.Near;

                     break;

                 case ContentAlignment.MiddleRight:

                     format.Alignment = StringAlignment.Center;

                     format.LineAlignment = StringAlignment.Far;

                     break;

                 case ContentAlignment.BottomCenter:

                     format.Alignment = StringAlignment.Far;

                     format.LineAlignment = StringAlignment.Center;

                     break;

                 case ContentAlignment.BottomLeft:

                     format.Alignment = StringAlignment.Far;

                     format.LineAlignment = StringAlignment.Near;

                     break;

                 case ContentAlignment.BottomRight:

                     format.Alignment = StringAlignment.Far;

                     format.LineAlignment = StringAlignment.Far;

                     break;

             }

             format.FormatFlags |= StringFormatFlags.NoWrap;

             format.FormatFlags |= StringFormatFlags.NoClip;

             format.Trimming = StringTrimming.None;

             return format;

         }

         protected override void OnForeColorChanged(EventArgs e)

         {

             //Color has changed recreate our brush

             iBrush = new SolidBrush(ForeColor);

             base.OnForeColorChanged(e);

         }

         private void HandleTextSizeChange()

         {

             //Update text size according to text and font

             Graphics g = this.CreateGraphics();

             g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;

             iTextSize = g.MeasureString(Text, Font);

             iSeparatorSize = g.MeasureString(Separator, Font);

             iStringFormat = GetStringFormatFromContentAllignment(TextAlign);

             if (NeedToScroll())

             {

                 //Always align left when scrolling

                 iStringFormat.Alignment = StringAlignment.Near;

             }

         }

         protected override void OnTextChanged(EventArgs e)

         {

             HandleTextSizeChange();

             base.OnTextChanged(e);

         }

         protected override void OnFontChanged(EventArgs e)

         {

             HandleTextSizeChange();

             base.OnFontChanged(e);

         }

         protected override void OnTextAlignChanged(EventArgs e)

         {

             iStringFormat = GetStringFormatFromContentAllignment(TextAlign);

             base.OnTextAlignChanged(e);

         }

         protected override void OnPaint(PaintEventArgs e)

         {

             //Disable anti-aliasing

             e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;

             if (NeedToScroll())

             {

                 //Draw the first one

                 e.Graphics.TranslateTransform(-(float)CurrentPosition, 0);

                 e.Graphics.DrawString(Text, Font, iBrush, ClientRectangle, iStringFormat);

                 //Draw separator

                 e.Graphics.TranslateTransform(iTextSize.Width, 0);

                 e.Graphics.DrawString(Separator, Font, iBrush, ClientRectangle, iStringFormat);

                 //Draw the last one

                 e.Graphics.TranslateTransform(iSeparatorSize.Width, 0);

                 e.Graphics.DrawString(Text, Font, iBrush, ClientRectangle, iStringFormat);

             }

             else

             {

                 e.Graphics.DrawString(Text, Font, iBrush, ClientRectangle, iStringFormat);

             }

             //DrawText is not working without anti-aliasing. See: stackoverflow.com/questions/8283631/graphics-drawstring-vs-textrenderer-drawtextwhich-can-deliver-better-quality

             //TextRenderer.DrawText(e.Graphics, Text, Font, ClientRectangle, ForeColor, BackColor, iTextFormatFlags);

             //base.OnPaint(e);

         }

         public bool NeedToScroll()

         {

             //if (Width < e.Graphics.MeasureString(Text, Font).Width)

             if (Width < iTextSize.Width)

             {

                 return true;

             }

             return false;

         }

         protected override void Dispose(bool disposing)

         {

             if (disposing)

             {

                 if (Timer != null)

                     Timer.Dispose();

             }

             Timer = null;

         }

     }

 }