#region Namespaces
using System;
#endregion 

namespace ScriptCode {
	/// <summary>
	/// Drawing scripts are used for drawing a visual object.
	/// 
	/// This script can be used in several ways:
	/// (1) It can be used on a chart by clicking the chart in order to set the drawing's anchor points.
	/// (2) It can be used from another script by having that script set the drawing's anchor points.
	/// </summary>
	public partial class MyDrawing : DrawingScriptBase // NEVER CHANGE THE CLASS NAME 
	{
#region Variables

#endregion

#region OnInitialize
        /// <summary>
        /// This function is called when a new drawing instance is created.
        /// </summary>
        /// --------------------------------------------------------------------------------------------------
        /// THIS FUNCTION MUST ACCEPT THE SYMBOL INDEX PARAMETER AND SHOULD NOT ACCEPT ANY OTHER PARAMETERS.
        /// --------------------------------------------------------------------------------------------------
		/// <param name="symbolIndex" type="Symbol" default="">The underlying symbol index for the drawing.</param>
		public void OnInitialize(int symbolIndex) {
			// Initialize the drawing for the symbol to accept 2 anchor points. 		 
			DrawingInitialize(symbolIndex, 2);
			// Set the icon for the drawing tool.
			DrawingSetIcon("Speed Resistance Lines");
		}
#endregion

#region OnChartSetup
		/// <summary>
		/// This function is used for setting up the drawing on the chart and registering its pens (see the DrawingRegisterPen function).
		/// </summary>
		public override void OnChartSetup() {
			// Register the pens with which to draw the channels.
			DrawingRegisterPen("Top Pen", new int[] {
				22 ,81, 238, 255
			}, C_DashStyle.SOLID, 2);
			DrawingRegisterPen("Two Thirds Pen", new int[] {
				35, 145, 255, 255
			}, C_DashStyle.SOLID, 2);
			DrawingRegisterPen("Third Pen", new int[] {
				100, 150, 235, 255
			}, C_DashStyle.SOLID, 2);
		}
#endregion

#region OnDraw
		/// <summary>
		/// This function is used to draw the drawing by setting all of its anchor points, lines and labels on a virtual canvas. 
		/// The canvas x-axis values are the date and time of the underlying symbol bars and its y-axis values are the symbol prices. 
		///
		/// The location of the drawing on the canvas is specified by the drawing anchor points, which can either be specified by 
		/// clicking on a chart or from another script (see the Drawing functions).
		/// </summary>
		public override void OnDraw() {
			// Get the X value of anchor point 0. 
			int line1X = DrawingAnchorPointBarShift(0);
			// Get the Y value of anchor point 0. 
			double line1Y = DrawingAnchorPointValue(0);
			// Get the X value of anchor point 1. 
			int line2X = DrawingAnchorPointBarShift(1);
			// Get the Y value of anchor point 1. 
			double line2Y = DrawingAnchorPointValue(1);
			double line3Y = line1Y + 2d / 3 * (line2Y - line1Y);
			double line4Y = line1Y + 1d / 3 * (line2Y - line1Y);
			if (line1Y > line2Y) {
				line3Y = line2Y + 2d / 3 * (line1Y - line2Y);
				line4Y = line2Y + 1d / 3 * (line1Y - line2Y);
			}

			// Draw the top line. 
			DrawingSetLine("Top Pen", line1X, line1Y, "", line2X, line2Y, "1");
			// Draw the 2 / 3 line. 
			DrawingSetLine("Two Thirds Pen", line1X, line1Y, "", line2X, line3Y, "2/3");
			// Draw the 1 / 3 line. 
			DrawingSetLine("Third Pen", line1X, line1Y, "", line2X, line4Y, "1/2");
		}
#endregion
	}
}