Fixed Scale mouse dragging bug?

[drmartell]

I am finding an issue using the mouse to drag and adjust the vertical scaling.

This issue occurs when an indicator that uses drawing objects set to autoscale = true is accompanied with a dataseries that is set to autoscale = false.

Consider an indicator with the following code:

        protected override void Initialize()
        {
            Overlay		= true;
			AutoScale 	= true;
        }

        /// <summary>
        /// Called on each bar update event (incoming tick)
        /// </summary>
        protected override void OnBarUpdate()
        {
            // Use this method for calculating your indicator values. Assign a value to each
            // plot below by replacing 'Close[0]' with your own formula.
			DrawLine("Upper", true, 0, Close[0] + 10 * TickSize, 0, Close[0] + 10 * TickSize, Color.Transparent, DashStyle.Solid, 1);
			DrawLine("Lower", true, 0, Close[0] - 10 * TickSize, 0, Close[0] - 10 * TickSize, Color.Transparent, DashStyle.Solid, 1);
        }

Add this indicator to a chart and set the data series to autoscale false.

Now attempt to expand or contract the Y axis scaling using the mouse drag. What I am experiencing is that the first mouse drag works, and the second causes the scale to expand dramatically. There are no errors noted in the log.

[NinjaTrader_Austin]

drmartell, I just tried this out following your steps and I was able to scale the chart without incident.