Add Ellipse to canvas with Python: How?

Grasshopper Developer
, ,
1

Hello
How to add circle on canvas with Python?, I find this code from old grasshopper forum but i can’t make it work in Python

  private void RunScript(bool add, ref object A)
  {

  if (add) {

  // Create object and add to document
  GH_Document activeDoc = Grasshopper.Instances.ActiveCanvas.Document;
  MyComponent mfc = new MyComponent();
  activeDoc.AddObject(mfc, false, 0);
}

  }

  // <Custom additional code> 
public class MyComponent : GH_Component
{
  public MyComponent()
    : base("MyFirst", "MFC", "My first component", "Extra", "Simple")
  {
  }

  public override Guid ComponentGuid
  {
    get { return new Guid("{9C534DC9-DD49-4950-BD2D-D8C45726A46E}"); }
  }

  protected override void RegisterInputParams(GH_Component.GH_InputParamManager pManager)
  {
  }

  protected override void RegisterOutputParams(GH_Component.GH_OutputParamManager pManager)
  {
  }

  protected override void SolveInstance(IGH_DataAccess DA)
  {

  }


  public override void CreateAttributes()
  {
    {
      this.m_attributes = (IGH_Attributes) new MyAttributes(this);
    }
  }
}

public class MyAttributes : Grasshopper.Kernel.Attributes.GH_ComponentAttributes
{

  public MyAttributes(MyComponent owner) :
    base(owner)
  {
  }

  protected override void Render(Grasshopper.GUI.Canvas.GH_Canvas canvas, System.Drawing.Graphics graphics,
    Grasshopper.GUI.Canvas.GH_CanvasChannel channel)
  {

    base.Render(canvas, graphics, channel);
    if (channel != Grasshopper.GUI.Canvas.GH_CanvasChannel.Objects)
      return;
    System.Drawing.PointF p = this.Pivot;
    System.Drawing.Pen pen = new System.Drawing.Pen(System.Drawing.Brushes.AliceBlue);
    graphics.DrawEllipse(pen, 100, 100, 20, 20);
    graphics.FillEllipse(System.Drawing.Brushes.Brown, 100, 100, 20, 20);
  }
}

image
image1199×558 56.9 KB

add_circle_to_canvas.gh (4.6 KB)