PlotStyle.Triangle is not displayed

[iradielt]

Hi, I'm doing an indicator and it works, but it does not show the 2 PlotStyle.Triangle.


Draw.TriangleDown(....); - If it shows it
Sells[0] = Close[0]-(1*TickSize); - It shows nothing


I think the problem is that I'm using it on OnRender.


SharpDX.Direct2D1.Brush aBarBrushDX = AColor.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush bBarBrushDX = BColor.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush textBrush = TextColor.ToDxBrush(RenderTarget);
SharpDX.DirectWrite.TextFormat textFormat = new SharpDX.DirectWrite.TextFormat(NinjaTrader.Core.Gl obals.DirectWriteFactory, "Arial", barHeight
RenderTarget.DrawText(row, textFormat, rectText, textBrush);




They know how I can make it look.





The code is something like this.


/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////








if (State == State.SetDefaults)
{
Calculate = Calculate.OnBarClose;
IsOverlay = true;
DrawOnPricePanel = true;
PaintPriceMarkers = false;
ArePlotsConfigurable = false;
DisplayInDataBox = false;
ScaleJustification = NinjaTrader.Gui.Chart.ScaleJustification.Right;
IsSuspendedWhileInactive = true;


AddPlot(new Stroke(Brushes.OrangeRed, 6), PlotStyle.Dot, "down");
AddPlot(new Stroke(Brushes.Blue, 6), PlotStyle.Dot, "uper");

}



protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
{
SharpDX.Direct2D1.Brush aBarBrushDX = AColor.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush bBarBrushDX = BColor.ToDxBrush(RenderTarget);
SharpDX.Direct2D1.Brush textBrush = TextColor.ToDxBrush(RenderTarget);
SharpDX.DirectWrite.TextFormat textFormat = new SharpDX.DirectWrite.TextFormat(NinjaTrader.Core.Gl obals.DirectWriteFactory, "Arial", barHeight);

..............................

rectText = new SharpDX.RectangleF(x - barLength, yUpper, barLength, barHeight);
RenderTarget.DrawText(row, textFormat, rectText, textBrush);
}





protected override void OnBarUpdate()
{


if (CurrentBar <5)
return;

if ((Close[1] > Open[1])&&(Close[0] < Open[0]))
{
Draw.TriangleDown(this,CurrentBar.ToString() + "KeyDown" + CurrentBar, true, 0, High[0] + (distancetext*TickSize), Brushes.Red);
Sells[0] = Close[0]-(1*TickSize);
}

}

[Browsable(false)]
[XmlIgnore]
public Series<double> Sells
{
get { return Values[1]; }
}

[Browsable(false)]
[XmlIgnore]
public Series<double> Buys
{
get { return Values[0]; }
}

[NinjaTrader_Jim]

Hello iradielt,

Thanks for your post.

Plot rendering is handled by the base class, so if we are overriding OnRender, we will also need to call base.OnRender(chartControl, chartScale); to be able to draw Plots.

This may be excluded in what you copied, but another item I notice is that the code is not disposing of the DX brushes after render passes or on RenderTarget changes. It will be critical to take either of the following approaches to recreate device-dependent SharpDX resources as this can introduce memory leaks if unchecked.

1. Create SharpDX resources at the beginning of a OnRender and dispose at the end of OnRender
2. Dispose and recreate class level SharpDX resources in OnRenderTargetChanged()

SharpDX Best Practices - https://ninjatrader.com/support/help...arpDXResources

OnRenderTargetChanged - https://ninjatrader.com/support/help...getchanged.htm

Please let us know if we can be of further assistance.

[iradielt]

Add

aBarBrushDX.Dispose();
bBarBrushDX.Dispose();
textFormat.Dispose();
textBrush.Dispose();



Hi, I get this error when I add the page OnRenderTargetChanged - https://ninjatrader.com/support/help...getchanged.htm




|Indicator 'Test': Error on calling 'OnRenderTargetChanged' method: System.NullReferenceException: Object reference not set to an instance of an object.

[NinjaTrader_Jim]

Hello iradielt,

The objects must not be null if you are going to dispose them.

I have included some information on Object reference not set to an instance of an object errors below.

Checking for Null References - https://ninjatrader.com/support/help...references.htm

Here is a link to a Position Display Indicator that uses OnRenderTargetChange to dispose/recreate SharpDX brushes.

https://ninjatraderecosystem.com/user-app-share-download/position-display-indicator/

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