DrawLine with interactive line width

[artson]

Hi,

I want to draw some lines with a DrawingTool.
Then, selcting this line, I want to change a parameter in this line properties.
Depending on this parameter, I would like to change the colour, width, etc

Example:

This is how I usually draw a line within OnRender:

Point pto1= new Point(fx, fy);
SharpDX.Vector2 vector1=pto1.ToVector2();
Point pto2= new Point(fx2, fy2);
SharpDX.Vector2 vector2=pto2.ToVector2();

RenderTarget.DrawLine(vector1, vector2, outlineStroke.BrushDX, espesorStroke.Width, outlineStroke.StrokeStyle);

I would like to have something like:
RenderTarget.DrawLine(vector1, vector2, colour-variable, width-variable, outlineStroke.StrokeStyle);

without having to define so many "strokes" as combinations I need.


Thanks

[NinjaTrader_ChrisL]

Hi artson, thanks for writing in.

The overload to use will be:
RenderTarget.DrawLine(Vector2 point0, Vector2 point1, Brush brush, float strokeWidth, StrokeStyle strokeStyle)

The strokeWidth property can be a simple float public property:

[NinjaScriptProperty]
[Range(1, float.MaxValue)]
[Display(Name="MyFloat", Order=1, GroupName="Parameters")]
public float MyFloat
{ get; set; }

The Brush will need to be a C# style brush e.g.

[XmlIgnore]
public Brush MyBrush { get; set; }

[Browsable(false)]
public string MyBrushSerialize
{
  get { return Serialize.BrushToString(MyBrush); }
  set { MyBrush = Serialize.StringToBrush(value);  }
}

Then convert it to a SharpDX brush:

SharpDX.Direct2D1.Brush dxBrush = MyBrush .ToDxBrush(RenderTarget); //this can be used in RenderTarget.DrawLine

See also OnRenderTargetChanged to make sure you dispose the brush properly.

https://ninjatrader.com/support/helpGuides/nt8/NT%20HelpGuide%20English.html?onrendertargetchanged.htm

Here is the documentation where I found this information:

https://ninjatrader.com/support/helpGuides/nt8/NT%20HelpGuide%20English.html?dxextensions_todxbrush.htm

https://ninjatrader.com/support/helpGuides/nt8/NT%20HelpGuide%20English.html?working_with_brushes.htm

https://ninjatrader.com/support/helpGuides/nt8/NT%20HelpGuide%20English.html?sharpdx_direct2d1_rendertarget_drawline.htm

[artson]

Thanks!

I'm not an esxpert here, so I have some more questions.

How can I go from

[NinjaScriptProperty]
[Range(1, float.MaxValue)]
[Display(Name="MyFloat", Order=1, GroupName="Parameters")]
public float [B]MyFloat[/B]
{ get; set; }

to

RenderTarget.DrawLine(Vector2 point0, Vector2 point1, Brush brush, float strokeWidth, StrokeStyle strokeStyle)


If I put it:

RenderTarget.DrawLine(Vector2 point0, Vector2 point1, Brush brush, MyFloat, StrokeStyle strokeStyle)

I get an error:
not possible to convert from "float" to NinjaTrader.Gui.Stroke.......

[NinjaTrader_ChrisL]

Hi artson, I attached an example for you to try out. Please let me know if you have questions on it.

[artson]

Ok, thanks, interesting to learn more!