Custom Drawing Tool Question...

[funk101]

In GetSelectionPoints() I want to change the "anchor point" to the high of the bar selected, how would this be done?

public override Point[] GetSelectionPoints(ChartControl chartControl, ChartScale chartScale)
		{
			if (chartControl.BarsArray.Count == 0)
				return null;
			
			try
			{
                                Bars bars = chartControl.BarsArray[0].Bars;

				ChartPanel chartPanel = chartControl.ChartPanels[chartScale.PanelIndex];
				Point anchorPoint = Anchor.GetPoint(chartControl, chartPanel, chartScale);
				
                                int idx = bars.GetBar(Anchor.Time);
				[color=red]double high = bars.GetHigh(idx);[/color]

                                // Point highPoint = new Point();
                                [b] // how do I convert this "high" value to a useable "anchor point" to return?[/b]
				
				[color=red]return new[] { highPoint }; ??[/color]
			}
			catch (Exception e)
			{
				Print (e.Message);
				return null;
			}
		}

[funk101]

I will answer my own question for others :-)

public override Point[] GetSelectionPoints(ChartControl chartControl, ChartScale chartScale)
		{
			if (chartControl.BarsArray.Count == 0)
				return null;
			
			try
			{
				ChartPanel chartPanel = chartControl.ChartPanels[chartScale.PanelIndex];
				Point anchorPoint = Anchor.GetPoint(chartControl, chartPanel, chartScale);
				
                                // high is defined else where in the code from Bars object -> bars.GetHigh(index);
                                ChartAnchor HighAnchor = new ChartAnchor(Anchor.Time, high, chartControl);
                                Point highPoint = HighAnchor.GetPoint(chartControl, chartPanel, chartScale);
				
				return new[] { highPoint };
			}
			catch (Exception e)
			{
				Print (e.Message);
				return null;
			}
		}

[NinjaTrader_Matthew]

Use the chartScale.GetYByValue() method and pass in the high value you calculated.

If you solely want the selection point to be on the high of the bar, there is no reason to create a new anchor point, you can just assign the anchorPoint.Y to that value:

anchorPoint.Y = chartScale.GetYByValue(high);
				
return new[] { anchorPoint };

If you want to have both the objects Anchor as the selection point and you want a new selection point as the High value, you can create a copy of Anchor point and then set that copies .Y value, then return both points

Point highPoint = anchorPoint;

highPoint.Y = chartScale.GetYByValue(high);

return new[] { anchorPoint, highPoint };

[funk101]

Ah, cool, thanks.

[pesudoalias]

Thanks so much for sharing this!

Could you please paste the full context of your cod3? Need to do something similar in an indicator and am wondering where to put it. (OnBarUpdate? OnRender?)

Thanks again.