progressbar.cs

该即时通讯系统系统能够实现像QQ一样的通讯功能

using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
using System.Windows.Forms;


namespace LanMsg.XpProgressBar
{

	#region "  Gradient Mode  "

	public enum GradientMode
	{
		Vertical,
		VerticalCenter,
		Horizontal,
		HorizontalCenter,
		Diagonal
	} ;

	#endregion

	public class XpProgressBar : Control
	{
		#region "  Constructor  "

		private const string CategoryName = "Xp ProgressBar";
		
		public XpProgressBar()
		{}

		#endregion

		#region "  Private Fields  "

		private Color mColor1 = Color.FromArgb(170, 240, 170);

		private Color mColor2 = Color.FromArgb(10, 150, 10);

		private Color mColorBackGround = Color.White;

		private Color mColorText = Color.Black;

		private Image mDobleBack = null;

		private GradientMode mGradientStyle = GradientMode.VerticalCenter;

		private int mMax = 100;

		private int mMin = 0;

		private int mPosition = 50;

		private byte mSteepDistance = 2;

		private byte mSteepWidth = 6;

		#endregion
		
		#region "  Dispose  "

		protected override void Dispose(bool disposing)
		{
			if (! this.IsDisposed)
			{
				if (mDobleBack != null)
				{
					mDobleBack.Dispose();
				}
				if (mBrush1 != null)
				{
					mBrush1.Dispose();
				}

				if (mBrush2 != null)
				{
					mBrush2.Dispose();
				}

				base.Dispose(disposing);
			}
		}

		#endregion

		#region "  Colors   "

		[Category(CategoryName)]
		[Description("The Back Color of the Progress Bar")]
		public Color ColorBackGround
		{
			get { return mColorBackGround; }
			set
			{
				mColorBackGround = value;
				this.InvalidateBuffer(true);
			}
		}

		[Category(CategoryName)]
		[Description("The Border Color of the gradient in the Progress Bar")]
		public Color ColorBarBorder
		{
			get { return mColor1; }
			set
			{
				mColor1 = value;
				this.InvalidateBuffer(true);
			}
		}

		[Category(CategoryName)]
		[Description("The Center Color of the gradient in the Progress Bar")]
		public Color ColorBarCenter
		{
			get { return mColor2; }
			set
			{
				mColor2 = value;
				this.InvalidateBuffer(true);
			}
		}

		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
		[RefreshProperties(RefreshProperties.Repaint)]
		[Description("Set to TRUE to reset all colors like the Windows XP Progress Bar ")]
		[Category(CategoryName)]
		[DefaultValue(false)]
		public bool ColorsXP
		{
			get { return false; }
			set
			{
				ColorBarBorder = Color.FromArgb(170, 240, 170);
				ColorBarCenter = Color.FromArgb(10, 150, 10);
				ColorBackGround = Color.White;
			}
		}

		[Category(CategoryName)]
		[Description("The Color of the text displayed in the Progress Bar")]
		public Color ColorText
		{
			get { return mColorText; }
			set
			{
				mColorText = value;

				if (this.Text != String.Empty)
				{
					this.Invalidate();
				}
			}
		}

		#endregion

		#region "  Position   "

		[RefreshProperties(RefreshProperties.Repaint)]
		[Category(CategoryName)]
		[Description("The Current Position of the Progress Bar")]
		public int Position
		{
			get { return mPosition; }
			set
			{
				if (value > mMax)
				{
					mPosition = mMax;
				}
				else if (value < mMin)
				{
					mPosition = mMin;
				}
				else
				{
					mPosition = value;
				}
				this.Invalidate();
			}
		}

		[RefreshProperties(RefreshProperties.Repaint)]
		[Category(CategoryName)]
		[Description("The Max Position of the Progress Bar")]
		public int PositionMax
		{
			get { return mMax; }
			set
			{
				if (value > mMin)
				{
					mMax = value;

					if (mPosition > mMax)
					{
						Position = mMax;
					}

					this.InvalidateBuffer(true);
				}
			}
		}

		[RefreshProperties(RefreshProperties.Repaint)]
		[Category(CategoryName)]
		[Description("The Min Position of the Progress Bar")]
		public int PositionMin
		{
			get { return mMin; }
			set
			{
				if (value < mMax)
				{
					mMin = value;

					if (mPosition < mMin)
					{
						Position = mMin;
					}
					this.InvalidateBuffer(true);
				}
			}
		}

		[Category(CategoryName)]
		[Description("The number of Pixels between two Steeps in Progress Bar")]
		[DefaultValue((byte) 2)]
		public byte SteepDistance
		{
			get { return mSteepDistance; }
			set
			{
				if (value >= 0)
				{
					mSteepDistance = value;
					this.InvalidateBuffer(true);
				}
			}
		}

		#endregion

		#region  "  Progress Style   "

		[Category(CategoryName)]
		[Description("The Style of the gradient bar in Progress Bar")]
		[DefaultValue(GradientMode.VerticalCenter)]
		public GradientMode GradientStyle
		{
			get { return mGradientStyle; }
			set
			{
				if (mGradientStyle != value)
				{
					mGradientStyle = value;
					CreatePaintElements();
					this.Invalidate();
				}
			}
		}

		[Category(CategoryName)]
		[Description("The number of Pixels of the Steeps in Progress Bar")]
		[DefaultValue((byte) 6)]
		public byte SteepWidth
		{
			get { return mSteepWidth; }
			set
			{
				if (value > 0)
				{
					mSteepWidth = value;
					this.InvalidateBuffer(true);
				}
			}
		}

		#endregion

		#region "  BackImage  "

		[RefreshProperties(RefreshProperties.Repaint)]
		[Category(CategoryName)]
		public override Image BackgroundImage
		{
			get { return base.BackgroundImage; }
			set
			{
				base.BackgroundImage = value;
				InvalidateBuffer();
			}
		}

		#endregion

		#region "  Text Override  "

		[Category(CategoryName)]
		[Description("The Text displayed in the Progress Bar")]
		[DefaultValue("")]
		public override string Text
		{
			get
			{
				return base.Text;
			}
			set
			{
				if (base.Text != value)
				{
					base.Text = value;
					this.Invalidate();
				}
			}
		}

		#endregion

		#region "  Text Shadow  "

		private bool mTextShadow = true;

		[Category(CategoryName)]
		[Description("Set the Text shadow in the Progress Bar")]
		[DefaultValue(true)]
		public bool TextShadow
		{
			get { return mTextShadow; }
			set
			{
				mTextShadow = value;
				this.Invalidate();
			}
		}

		#endregion

		#region "  Text Shadow Alpha  "

		private byte mTextShadowAlpha = 150;

		[Category(CategoryName)]
		[Description("Set the Alpha Channel of the Text shadow in the Progress Bar")]
		[DefaultValue((byte) 150)]
		public byte TextShadowAlpha
		{
			get { return mTextShadowAlpha; }
			set
			{
				if (mTextShadowAlpha != value)
				{
					mTextShadowAlpha = value;
					this.TextShadow = true;
				}
			}
		}

		#endregion

		#region "  Paint Methods  "

		#region "  OnPaint  "

		protected override void OnPaint(PaintEventArgs e)
		{
			//System.Diagnostics.Debug.WriteLine("Paint " + this.Name + "  Pos: "+this.Position.ToString());
			if (!this.IsDisposed)
			{
				int mSteepTotal = mSteepWidth + mSteepDistance;
				float mUtilWidth = this.Width - 6 + mSteepDistance;

				if (mDobleBack == null)
				{
					mUtilWidth = this.Width - 6 + mSteepDistance;
					int mMaxSteeps = (int) (mUtilWidth/mSteepTotal);
					this.Width = 6 + mSteepTotal*mMaxSteeps;

					mDobleBack = new Bitmap(this.Width, this.Height);

					Graphics g2 = Graphics.FromImage(mDobleBack);

					CreatePaintElements();

					g2.Clear(mColorBackGround);

					if (this.BackgroundImage != null)
					{
						TextureBrush textuBrush = new TextureBrush(this.BackgroundImage, WrapMode.Tile);
						g2.FillRectangle(textuBrush, 0, 0, this.Width, this.Height);
						textuBrush.Dispose();
					}
					//				g2.DrawImage()

					g2.DrawRectangle(mPenOut2, outnnerRect2);
					g2.DrawRectangle(mPenOut, outnnerRect);
					g2.DrawRectangle(mPenIn, innerRect);
					g2.Dispose();

				}

				Image ima = new Bitmap(mDobleBack);

				Graphics gtemp = Graphics.FromImage(ima);

				int mCantSteeps = (int) ((((float) mPosition - mMin)/(mMax - mMin))*mUtilWidth/mSteepTotal);

				for (int i = 0; i < mCantSteeps; i++)
				{
					DrawSteep(gtemp, i);
				}

				if (this.Text != String.Empty)
				{
					gtemp.TextRenderingHint = TextRenderingHint.AntiAlias;
					DrawCenterString(gtemp, this.ClientRectangle);
				}

				e.Graphics.DrawImage(ima, e.ClipRectangle.X, e.ClipRectangle.Y, e.ClipRectangle, GraphicsUnit.Pixel);
				ima.Dispose();
				gtemp.Dispose();

			}

		}

		protected override void OnPaintBackground(PaintEventArgs e)
		{
		}

		#endregion

		#region "  OnSizeChange  "

		protected override void OnSizeChanged(EventArgs e)
		{
			if (!this.IsDisposed)
			{
				if (this.Height < 12)
				{
					this.Height = 12;
				}

				base.OnSizeChanged(e);
				this.InvalidateBuffer(true);
			}

		}

		protected override Size DefaultSize
		{
			get { return new Size(100, 29); }
		}


		#endregion

		#region "  More Draw Methods  "

		private void DrawSteep(Graphics g, int number)
		{
			g.FillRectangle(mBrush1, 4 + number*(mSteepDistance + mSteepWidth), mSteepRect1.Y + 1, mSteepWidth, mSteepRect1.Height);
			g.FillRectangle(mBrush2, 4 + number*(mSteepDistance + mSteepWidth), mSteepRect2.Y + 1, mSteepWidth, mSteepRect2.Height - 1);
		}

		private void InvalidateBuffer()
		{
			InvalidateBuffer(false);
		}

		private void InvalidateBuffer(bool InvalidateControl)
		{
			if (mDobleBack != null)
			{
				mDobleBack.Dispose();
				mDobleBack = null;
			}

			if (InvalidateControl)
			{
				this.Invalidate();
			}
		}

		private void DisposeBrushes()
		{
			if (mBrush1 != null)
			{
				mBrush1.Dispose();
				mBrush1 = null;
			}

			if (mBrush2 != null)
			{
				mBrush2.Dispose();
				mBrush2 = null;
			}

		}

		private void DrawCenterString(Graphics gfx, Rectangle box)
		{
			SizeF ss = gfx.MeasureString(this.Text, this.Font);

			float left = box.X + (box.Width - ss.Width)/2;
			float top = box.Y + (box.Height - ss.Height)/2;

			if (mTextShadow)
			{
				SolidBrush mShadowBrush = new SolidBrush(Color.FromArgb(mTextShadowAlpha, Color.Black));
				gfx.DrawString(this.Text, this.Font, mShadowBrush, left + 1, top + 1);
				mShadowBrush.Dispose();
			}
			SolidBrush mTextBrush = new SolidBrush(mColorText);
			gfx.DrawString(this.Text, this.Font, mTextBrush, left, top);
			mTextBrush.Dispose();

		}

		#endregion

		#region "  CreatePaintElements   "

		private Rectangle innerRect;
		private LinearGradientBrush mBrush1;
		private LinearGradientBrush mBrush2;
		private Pen mPenIn = new Pen(Color.FromArgb(239, 239, 239));

		private Pen mPenOut = new Pen(Color.FromArgb(104, 104, 104));
		private Pen mPenOut2 = new Pen(Color.FromArgb(190, 190, 190));

		private Rectangle mSteepRect1;
		private Rectangle mSteepRect2;
		private Rectangle outnnerRect;
		private Rectangle outnnerRect2;

		private void CreatePaintElements()
		{
			DisposeBrushes();

			switch (mGradientStyle)
			{
				case GradientMode.VerticalCenter:

					mSteepRect1 = new Rectangle(
						0,
						2,
						mSteepWidth,
						this.Height/2 + (int) (this.Height*0.05));
					mBrush1 = new LinearGradientBrush(mSteepRect1, mColor1, mColor2, LinearGradientMode.Vertical);

					mSteepRect2 = new Rectangle(
						0,
						mSteepRect1.Bottom - 1,
						mSteepWidth,
						this.Height - mSteepRect1.Height - 4);
					mBrush2 = new LinearGradientBrush(mSteepRect2, mColor2, mColor1, LinearGradientMode.Vertical);
					break;

				case GradientMode.Vertical:
					mSteepRect1 = new Rectangle(
						0,
						3,
						mSteepWidth,
						this.Height - 7);
					mBrush1 = new LinearGradientBrush(mSteepRect1, mColor1, mColor2, LinearGradientMode.Vertical);
					mSteepRect2 = new Rectangle(
						-100,
						-100,
						1,
						1);
					mBrush2 = new LinearGradientBrush(mSteepRect2, mColor2, mColor1, LinearGradientMode.Horizontal);
					break;


				case GradientMode.Horizontal:
					mSteepRect1 = new Rectangle(
						0,
						3,
						mSteepWidth,
						this.Height - 7);

					//					mBrush1 = new LinearGradientBrush(rTemp, mColor1, mColor2, LinearGradientMode.Horizontal);
					mBrush1 = new LinearGradientBrush(this.ClientRectangle, mColor1, mColor2, LinearGradientMode.Horizontal);
					mSteepRect2 = new Rectangle(
						-100,
						-100,
						1,
						1);
					mBrush2 = new LinearGradientBrush(mSteepRect2, Color.Red, Color.Red, LinearGradientMode.Horizontal);
					break;


				case GradientMode.HorizontalCenter:
					mSteepRect1 = new Rectangle(
						0,
						3,
						mSteepWidth,
						this.Height - 7);
					//					mBrush1 = new LinearGradientBrush(rTemp, mColor1, mColor2, LinearGradientMode.Horizontal);
					mBrush1 = new LinearGradientBrush(this.ClientRectangle, mColor1, mColor2, LinearGradientMode.Horizontal);
					mBrush1.SetBlendTriangularShape(0.5f);

					mSteepRect2 = new Rectangle(
						-100,
						-100,
						1,
						1);
					mBrush2 = new LinearGradientBrush(mSteepRect2, Color.Red, Color.Red, LinearGradientMode.Horizontal);
					break;


				case GradientMode.Diagonal:
					mSteepRect1 = new Rectangle(
						0,
						3,
						mSteepWidth,
						this.Height - 7);
					//					mBrush1 = new LinearGradientBrush(rTemp, mColor1, mColor2, LinearGradientMode.ForwardDiagonal);
					mBrush1 = new LinearGradientBrush(this.ClientRectangle, mColor1, mColor2, LinearGradientMode.ForwardDiagonal);
					//					((LinearGradientBrush) mBrush1).SetBlendTriangularShape(0.5f);

					mSteepRect2 = new Rectangle(
						-100,
						-100,
						1,
						1);
					mBrush2 = new LinearGradientBrush(mSteepRect2, Color.Red, Color.Red, LinearGradientMode.Horizontal);
					break;

				default:
					mBrush1 = new LinearGradientBrush(mSteepRect1, mColor1, mColor2, LinearGradientMode.Vertical);
					mBrush2 = new LinearGradientBrush(mSteepRect2, mColor2, mColor1, LinearGradientMode.Vertical);
					break;

			}

			innerRect = new Rectangle(
				this.ClientRectangle.X + 2,
				this.ClientRectangle.Y + 2,
				this.ClientRectangle.Width - 4,
				this.ClientRectangle.Height - 4);
			outnnerRect = new Rectangle(
				this.ClientRectangle.X,
				this.ClientRectangle.Y,
				this.ClientRectangle.Width - 1,
				this.ClientRectangle.Height - 1);
			outnnerRect2 = new Rectangle(
				this.ClientRectangle.X + 1,
				this.ClientRectangle.Y + 1,
				this.ClientRectangle.Width,
				this.ClientRectangle.Height);

		}

		#endregion

		#endregion
	}

}