sl@0: using System;
sl@0: using System.Collections.Generic;
sl@0: using System.ComponentModel;
sl@0: using System.Diagnostics;
sl@0: using System.Linq;
sl@0: using System.Text;
sl@0: using System.Threading.Tasks;
sl@0: //using System.Timers;
sl@0: using System.Windows.Forms;
sl@0: using System.Drawing;
sl@0: 
sl@0: namespace SharpDisplayManager
sl@0: {
sl@0:     class MarqueeLabel : Label
sl@0:     {
sl@2:         private bool iOwnTimer;
sl@5:         private StringFormat iStringFormat;
sl@5:         private SolidBrush iBrush;
sl@6:         private SizeF iTextSize;
sl@0: 
sl@0:         [Category("Behavior")]
sl@0:         [Description("How fast is our text scrolling, in pixels per second.")]
sl@0:         [DefaultValue(32)]
sl@0:         [Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]
sl@0:         public int PixelsPerSecond { get; set; }
sl@0: 
sl@2:         [Category("Behavior")]
sl@2:         [Description("Use an internal or an external timer.")]
sl@2:         [DefaultValue(true)]
sl@2:         [Browsable(true), EditorBrowsable(EditorBrowsableState.Always)]
sl@2:         public bool OwnTimer
sl@2:         {
sl@2:             get
sl@2:             {
sl@2:                 return iOwnTimer;
sl@2:             }
sl@2:             set
sl@2:             {
sl@2:                 iOwnTimer = value;
sl@2: 
sl@2:                 if (iOwnTimer)
sl@2:                 {
sl@2:                     Timer = new Timer();
sl@2:                     Timer.Interval = 10;
sl@2:                     Timer.Tick += new EventHandler(Timer_Tick);
sl@2:                     Timer.Start();
sl@2:                 }
sl@2:                 else
sl@2:                 {
sl@2:                     if (Timer != null)
sl@2:                         Timer.Dispose();
sl@2:                     Timer = null;
sl@2:                 }
sl@2: 
sl@2:             }
sl@2:         }
sl@5: 
sl@2:         private int CurrentPosition { get; set; }
sl@2:         private Timer Timer { get; set; }
sl@0:         private DateTime LastTickTime { get; set; }
sl@0:         private double PixelsLeft { get; set; }
sl@0:         //DateTime a = new DateTime(2010, 05, 12, 13, 15, 00);
sl@2:         //DateTime b = new DateTime(2010, 05, 12, 13, 45, 00);
sl@2:         //Console.WriteLine(b.Subtract(a).TotalMinutes);
sl@0: 
sl@0:         public MarqueeLabel()
sl@0:         {
sl@0:             UseCompatibleTextRendering = true;
sl@0:             //PixelsPerSecond = 32;
sl@0:             LastTickTime = DateTime.Now;
sl@0:             PixelsLeft = 0;
sl@5:             iBrush = new SolidBrush(ForeColor);
sl@0:         }
sl@0: 
sl@2:         public void UpdateAnimation(DateTime aLastTickTime, DateTime aNewTickTime)
sl@0:         {
sl@6:             if (!NeedToScroll())
sl@0:             {
sl@6:                 CurrentPosition = 0;
sl@6:                 return;
sl@6:             }
sl@6: 
sl@6:             while (CurrentPosition > (iTextSize.Width))
sl@6:             {
sl@6:                 CurrentPosition -= ((int)iTextSize.Width);
sl@0:             }
sl@0: 
sl@2:             PixelsLeft += aNewTickTime.Subtract(aLastTickTime).TotalSeconds * PixelsPerSecond;
sl@0: 
sl@0:             //Keep track of our pixels left over
sl@0:             //PixelsLeft = offset - Math.Truncate(offset);
sl@0:             double offset = Math.Truncate(PixelsLeft);
sl@0:             PixelsLeft -= offset;
sl@0: 
sl@0:             CurrentPosition += Convert.ToInt32(offset);
sl@0: 
sl@0:             /*
sl@0:             if (offset > 1.0)
sl@0:             {
sl@0:                 BackColor = Color.Red;
sl@0:             }
sl@0:             else if (offset==1.0)
sl@0:             {
sl@0:                 if (BackColor != Color.White)
sl@0:                 {
sl@0:                     BackColor = Color.White;
sl@0:                 }
sl@0: 
sl@0:             }
sl@0:             else
sl@0:             {
sl@0:                 //Too slow
sl@0:                 //BackColor = Color.Green;
sl@0:             }*/
sl@0: 
sl@0:             //Only redraw if something has changed
sl@0:             if (offset != 0)
sl@0:             {
sl@0:                 Invalidate();
sl@0:             }
sl@2:         }
sl@0: 
sl@2:         void Timer_Tick(object sender, EventArgs e)
sl@2:         {
sl@5:             DateTime NewTickTime = DateTime.Now;
sl@2:             //
sl@2:             UpdateAnimation(LastTickTime, NewTickTime);
sl@2:             //
sl@2:             LastTickTime = NewTickTime;
sl@0:         }
sl@0: 
sl@5:         private StringFormat GetStringFormatFromContentAllignment(ContentAlignment ca)
sl@5:         {
sl@5:             StringFormat format = new StringFormat();
sl@5:             switch (ca)
sl@5:             {
sl@5:                 case ContentAlignment.TopCenter:
sl@5:                     format.Alignment = StringAlignment.Near;
sl@5:                     format.LineAlignment = StringAlignment.Center;
sl@5:                     break;
sl@5:                 case ContentAlignment.TopLeft:
sl@5:                     format.Alignment = StringAlignment.Near;
sl@5:                     format.LineAlignment = StringAlignment.Near;
sl@5:                     break;
sl@5:                 case ContentAlignment.TopRight:
sl@5:                     format.Alignment = StringAlignment.Near;
sl@5:                     format.LineAlignment = StringAlignment.Far;
sl@5:                     break;
sl@5:                 case ContentAlignment.MiddleCenter:
sl@5:                     format.Alignment = StringAlignment.Center;
sl@5:                     format.LineAlignment = StringAlignment.Center;
sl@5:                     break;
sl@5:                 case ContentAlignment.MiddleLeft:
sl@5:                     format.Alignment = StringAlignment.Center;
sl@5:                     format.LineAlignment = StringAlignment.Near;
sl@5:                     break;
sl@5:                 case ContentAlignment.MiddleRight:
sl@5:                     format.Alignment = StringAlignment.Center;
sl@5:                     format.LineAlignment = StringAlignment.Far;
sl@5:                     break;
sl@5:                 case ContentAlignment.BottomCenter:
sl@5:                     format.Alignment = StringAlignment.Far;
sl@5:                     format.LineAlignment = StringAlignment.Center;
sl@5:                     break;
sl@5:                 case ContentAlignment.BottomLeft:
sl@5:                     format.Alignment = StringAlignment.Far;
sl@5:                     format.LineAlignment = StringAlignment.Near;
sl@5:                     break;
sl@5:                 case ContentAlignment.BottomRight:
sl@5:                     format.Alignment = StringAlignment.Far;
sl@5:                     format.LineAlignment = StringAlignment.Far;
sl@5:                     break;
sl@5:             }
sl@5: 
sl@5:             format.FormatFlags |= StringFormatFlags.NoWrap;
sl@5:             format.FormatFlags |= StringFormatFlags.NoClip;
sl@5:             format.Trimming = StringTrimming.None;
sl@5: 
sl@5:             return format;
sl@5:         }
sl@5: 
sl@5:         protected override void OnForeColorChanged(EventArgs e)
sl@5:         {
sl@6:             //Color has changed recreate our brush
sl@5:             iBrush = new SolidBrush(ForeColor);
sl@5: 
sl@5:             base.OnForeColorChanged(e);
sl@5:         }
sl@5: 
sl@6: 
sl@6:         private void HandleTextSizeChange()
sl@6:         {
sl@6:             //Update text size according to text and font
sl@6:             Graphics g = this.CreateGraphics();
sl@6:             g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;
sl@6:             iTextSize = g.MeasureString(Text, Font);
sl@6:             iStringFormat = GetStringFormatFromContentAllignment(TextAlign);
sl@6: 
sl@6:             if (NeedToScroll())
sl@6:             {
sl@6:                 //Always align left when scrolling
sl@6:                 iStringFormat.Alignment = StringAlignment.Near;
sl@6:             }
sl@6:         }
sl@6: 
sl@6:         protected override void OnTextChanged(EventArgs e)
sl@6:         {
sl@6:             HandleTextSizeChange();
sl@6: 
sl@6:             base.OnTextChanged(e);
sl@6:         }
sl@6: 
sl@6:         protected override void OnFontChanged(EventArgs e)
sl@6:         {
sl@6:             HandleTextSizeChange();
sl@6: 
sl@6:             base.OnFontChanged(e);
sl@6:         }
sl@6: 
sl@5:         protected override void OnTextAlignChanged(EventArgs e)
sl@5:         {
sl@5:             iStringFormat = GetStringFormatFromContentAllignment(TextAlign);
sl@5: 
sl@5:             base.OnTextAlignChanged(e);
sl@5: 
sl@5:         }
sl@5: 
sl@0:         protected override void OnPaint(PaintEventArgs e)
sl@0:         {
sl@0:             //Disable anti-aliasing
sl@0:             e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;
sl@6:             if (NeedToScroll())
sl@6:             {
sl@6:                 //Draw the first one
sl@6:                 e.Graphics.TranslateTransform(-(float)CurrentPosition, 0);
sl@6:                 e.Graphics.DrawString(Text, Font, iBrush, ClientRectangle, iStringFormat);
sl@6:                 //Draw the last one
sl@6:                 e.Graphics.TranslateTransform(iTextSize.Width, 0);
sl@6:                 e.Graphics.DrawString(Text, Font, iBrush, ClientRectangle, iStringFormat);
sl@6:             }
sl@6:             else
sl@6:             {
sl@6:                 e.Graphics.DrawString(Text, Font, iBrush, ClientRectangle, iStringFormat);
sl@6:             }
sl@6: 
sl@6: 
sl@5: 
sl@5:             //DrawText is not working without anti-aliasing. See: stackoverflow.com/questions/8283631/graphics-drawstring-vs-textrenderer-drawtextwhich-can-deliver-better-quality
sl@5:             //TextRenderer.DrawText(e.Graphics, Text, Font, ClientRectangle, ForeColor, BackColor, iTextFormatFlags);
sl@5: 
sl@5:             //base.OnPaint(e);
sl@0:         }
sl@0: 
sl@6:         public bool NeedToScroll()
sl@6:         {
sl@6:             //if (Width < e.Graphics.MeasureString(Text, Font).Width)
sl@6:             if (Width < iTextSize.Width)
sl@6:             {
sl@6:                 return true;
sl@6:             }
sl@6:             return false;
sl@6:         }
sl@6: 
sl@0:         protected override void Dispose(bool disposing)
sl@0:         {
sl@0:             if (disposing)
sl@0:             {
sl@0:                 if (Timer != null)
sl@0:                     Timer.Dispose();
sl@0:             }
sl@0:             Timer = null;
sl@0:         }
sl@0:     }
sl@0: }