using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;

// a simple line class
// Indigo Softworks 2004

namespace Indigo
{
	/// <summary>
	/// A line control that can be either vertically, horizontally or diagonally oriented
	/// </summary>
	internal class Line : System.Windows.Forms.UserControl
	{
		public enum LineOrientation
		{
			Horizontal, Vertical, Ascending, Descending
		};

		/// <summary> 
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		// Color of the line. Color 1 is the main color and color 2 the "shadow" color.
		private Color color1, color2;
		// Orientation of the line
		private LineOrientation orientation;

		public Line()
		{
			// This call is required by the Windows.Forms Form Designer.
			InitializeComponent();

			// Initialize variables
			this.color1 = System.Drawing.SystemColors.GrayText;
			this.color2 = Color.WhiteSmoke;
			orientation = LineOrientation.Horizontal;
		}

		/// <summary> 
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Component Designer generated code
		/// <summary> 
		/// Required method for Designer support - do not modify 
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			// 
			// Line
			// 
			this.Name = "Line";
			this.Size = new System.Drawing.Size(72, 112);
			this.Resize += new System.EventHandler(this.Line_Resize);

		}
		#endregion

		[Description("Line orientation."), Category("Appearance")]
		public LineOrientation Orientation
		{
			get
			{
				return orientation;
			}
			set
			{
				orientation = value;
				Invalidate();
			}
		}

		[Description("The primary line color."), Category("Appearance")]
		public Color PrimaryColor
		{
			get
			{
				return this.color1;
			}
			set
			{
				this.color1 = value;
				Invalidate();
			}
		}

		[Description("The secondary line color."), Category("Appearance")]
		public Color SecondaryColor
		{
			get
			{
				return this.color2;
			}
			set
			{
				this.color2 = value;
				Invalidate();
			}
		}

		protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
		{
			Graphics g = e.Graphics;
			Pen pen = new Pen(color1);
			Pen pen2 = new Pen(color2);
			
			// Draw horizontal line
			if (orientation == LineOrientation.Horizontal && this.Width > 1)
			{
				g.DrawLine(pen, 0, this.Height / 2, this.Width, this.Height / 2);
				g.DrawLine(pen2, 0, this.Height / 2+1, this.Width, this.Height / 2+1);
			}
			// Draw vertical line 
			else if (orientation == LineOrientation.Vertical && this.Height > 1)
			{
				g.DrawLine(pen, this.Width / 2, 0, this.Width / 2, this.Height);
				g.DrawLine(pen2, this.Width / 2+1, 0, this.Width / 2+1, this.Height);
			}
			// Draw diagonal line
			else if (this.Height > 1 && this.Width > 1)
			{
				// Descending line
				if (orientation == LineOrientation.Descending)
				{
					g.DrawLine(pen2, 0, 1, this.Width, this.Height-1);
					g.DrawLine(pen, 0, 0, this.Width, this.Height-2);
				}
				// Ascending line
				else 
				{
					g.DrawLine(pen2, 0, this.Height-1, this.Width, 1);
					g.DrawLine(pen, 0, this.Height-2, this.Width, 0);
				}
			}

			pen.Dispose();
		}

		private void Line_Resize(object sender, System.EventArgs e)
		{
			Invalidate();
		}
	}
}