Drawing at Bottom/Top of Chart Window

[Zeos6]

Hi,

Is there a quick way to draw a figure, say rectangle, at the bottom of the visible chart window? ChartScale MaxValue and MinValue don't seem to be available outside of OnRender. Please advise. Thank you.

[NinjaTrader_ChrisL]

Hello Zeos6.

Thank you for the post.

Please see section 1.4 - Rendering Custom Shapes in 'SampleCustomRender.cs' in a NinjaScript editor.

Here is the code used to print a large rectangle:

// 1.4 - Rendering Custom Shapes

			SharpDX.RectangleF rect = new SharpDX.RectangleF(startPoint.X, startPoint.Y, width, height);

			RenderTarget.FillRectangle(rect, areaBrushDx);
			
			RenderTarget.DrawRectangle(rect, customDXBrush, 2);

You can see at the beginning of OnRender(), there are two SharpDX vectors, and they are set by accessing the X/Y coordinates of the ChartPanel object, which is global to your script.

// 1.1 - SharpDX Vectors and Charting RenderTarget Coordinates

		SharpDX.Vector2 startPoint;
		SharpDX.Vector2 endPoint;

startPoint = new SharpDX.Vector2(ChartPanel.X, ChartPanel.Y);
		endPoint = new SharpDX.Vector2(ChartPanel.X + ChartPanel.W, ChartPanel.Y + ChartPanel.H);

You can compute the bottom left of this panel from the X, Y coordinates.

Here is a link to the help guide on ChartPanel objects:

https://ninjatrader.com/support/helpGuides/nt8/en-us/?chartpanel.htm

Here is a link to the help guide on SharpDX DrawRectangle():

https://ninjatrader.com/support/helpGuides/nt8/en-us/?drawrectangle2.htm

If questions come up or if we may be of any further assistance, please let us know.

[Zeos6]

Thanks ChrisL. Didn't notice that one. Very helpful. Thank you for the info.