AForge.Controls.Histogram.Histogram_MouseDown C# (CSharp) Method

		private void Histogram_MouseDown(object sender,System.Windows.Forms.MouseEventArgs e)
		{
			if ((allowSelection) && (values != null))
			{
				var x = 1;
				var y = 1;

				if ((e.X >= x) && (e.Y >= y) && (e.X < x + width) && (e.Y < y + height))
				{
					// start selection
					tracking = true;
					start = (vertical) ? (e.Y - y) : (e.X - x);
					this.Capture = true;
				}
			}
		}