Fill Ellipse Tool

[Quant]

Hi,

We require fill properties (like Fill Color/Pattern, Transparency %, etc.) of Drawline Tool for following shapes:
1] Ellipse
2] Rectangle
3] Horizontal Parallel Line
4] Rectangle Parallel Line

[Christopher]

We require fill properties (like Fill Color/Pattern, Transparency %, etc.) of Drawline Tool for following shapes:

The DrawLine Tool enables a user to draw lines on a TeeChart. Lines only have Pen characteristics, unlike the shapes you mention which have both Pen and Brush characteristics. I'm not sure I understand how you want the DrawLine Tool to draw anything other than lines. Could you please explain?

[Quant]

The DrawLine Tool enables a user to draw lines on a TeeChart. Lines only have Pen characteristics, unlike the shapes you mention which have both Pen and Brush characteristics. I'm not sure I understand how you want the DrawLine Tool to draw anything other than lines. Could you please explain?

DrawLine Tool also provides a style property which has options for following shapes:

• Line,
  HorizParallel,
  VertParallel,
  Rectangle,
  Ellipse

We did check the source code of DrawLine.cs and we knew that it has only Pen Characteristics but we have a requirement where user wants fill properties (like fill color, fill pattern, transparency etc.) for shapes other than Line. It would be of great feature for TeeChart if these shapes have a fill properties because user can use these tools for highlighting specific regions based on their needs. So we would like to request you to consider this requirement. Going further, if you are considering this requirement for future release please provide us some kind of solution to complete this requirement asap.

[Christopher]

So we would like to request you to consider this requirement. Going further, if you are considering this requirement for future release please provide us some kind of solution to complete this requirement asap.

I have added this request as an enhancement to our issue tracking software with id=1405.

In the meantime, a workaround is relatively straightforward. Firstly, add this class to your code:

Code: Select all

  public class MyDrawLine : DrawLine
  {
    public MyDrawLine(Chart c) : base(c)
    {
      Brush = new ChartBrush(c);
    }

    public ChartBrush Brush { get; set; }


    protected override void ChartEvent(EventArgs e)
    {
      if (e is AfterDrawEventArgs)
      {
        if (Lines.Count > 0)
        {
          foreach (DrawLineItem l in Lines)
          {
            RedrawBrushLine(l);
          }
        }
        if (drawing)
        {
          RedrawBrushLine(Selected);
        }
      }

      base.ChartEvent(e);
    }

    private void RedrawBrushLine(DrawLineItem line)
    {
      Graphics3D g = Chart.Graphics3D;

      g.Brush = Brush;

      if ((Chart != null) && g.ValidState())
      {
        DrawLineStyle s = (line == null) ? this.Style : line.Style;

        bool oldPen = g.Pen.Visible;
        g.Pen.Visible = false;

        ClipDrawingRegion(g);
        if (line == null)
        {
          DoDrawLine(g, this.FromPoint, this.ToPoint, s);
        }
        else
        {
          DoDrawLine(g, AxisPoint(line.StartPos), AxisPoint(line.EndPos), s);
        }

        g.Pen.Visible = oldPen;
        g.UnClip();
      }
    }

    private void DoDrawLine(Graphics3D g, Point StartPos, Point EndPos, DrawLineStyle AStyle)
    {
      if (!base.Chart.Aspect.View3D)
      {
        if (AStyle != DrawLineStyle.Line)
        {
          if (AStyle == DrawLineStyle.Rectangle)
          {
            g.Rectangle(Utils.FromLTRB(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y));
          }
          else if (AStyle == DrawLineStyle.Ellipse)
          {
            g.Ellipse(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y);
          }
        }
      }
      else if (AStyle != DrawLineStyle.Line)
      {
        if (AStyle == DrawLineStyle.Rectangle)
        {
          g.Rectangle(Utils.FromLTRB(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y), 0);
        }
        else if (AStyle == DrawLineStyle.Ellipse)
        {
          g.Ellipse(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y, 0);
        }
      }
    }
  }

And then consume it in an example like this:

Code: Select all

    private void InitializeChart()
    {
      tChart1.Aspect.View3D = false;

      Line line1 = new Line(tChart1.Chart);

      line1.Add(2, 2);
      line1.Add(8, 8);

      MyDrawLine drawLine1 = new MyDrawLine(tChart1.Chart);
      drawLine1.Pen.Color = Color.Yellow;
      drawLine1.Pen.Width = 2;
      drawLine1.Brush.Color = Color.Red;

      Steema.TeeChart.Tools.DrawLineItem I = new Steema.TeeChart.Tools.DrawLineItem(drawLine1);
      double tmp = line1.YValues.Range / 5.0;
      I.StartPos = new PointDouble(5, line1.YValues.Maximum - tmp);
      I.EndPos = new PointDouble(7, line1.YValues.Minimum + tmp);
      I.Style = DrawLineStyle.Rectangle;
    }

[Quant]

Thanks for the help.
But we already updated DrawLine.cs which works as required. Check the below code snippet :

Code: Select all

	private void DoDrawLine(Graphics3D g, Point StartPos, Point EndPos, DrawLineStyle AStyle)
    {
      bool oldBrush, oldPen;
      
        if (AStyle != DrawLineStyle.Line)
        {
          if (AStyle == DrawLineStyle.HorizParallel)
          {
            g.HorizontalLine(StartPos.X, EndPos.X, StartPos.Y);
            g.HorizontalLine(StartPos.X, EndPos.X, EndPos.Y);
            if (IsFilled)
            {
                g.Brush.Color = FillColor;
                g.Brush.Transparency = FillTransparency;

                //Add Rectangle with Transparency
                oldPen = g.Pen.Visible;
                g.Pen.Visible = false;
                g.Rectangle(Utils.FromLTRB(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y));
                g.Pen.Visible = oldPen;
            }
          }
          else if (AStyle == DrawLineStyle.Rectangle)
          {
            oldBrush = g.Brush.Visible;
            if (IsFilled)
            {
                g.Brush.Color = FillColor;
                g.Brush.Transparency = FillTransparency;

                g.Brush.Visible = true;
            }
            else
            {
                g.Brush.Visible = false;
            }
            g.Rectangle(Utils.FromLTRB(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y));
            g.Brush.Visible = oldBrush;
          }
          else if (AStyle == DrawLineStyle.Ellipse)
          {
            oldBrush = g.Brush.Visible;
            if (IsFilled)
            {
                g.Brush.Color = FillColor;
                g.Brush.Transparency = FillTransparency;

                g.Brush.Visible = true;
            }
            else
            {
                g.Brush.Visible = false;
            }
            g.Ellipse(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y);
            g.Brush.Visible = oldBrush;
          }
          else
          {
            g.VerticalLine(StartPos.X, StartPos.Y, EndPos.Y);
            g.VerticalLine(EndPos.X, StartPos.Y, EndPos.Y);
            if (IsFilled)
            {
                g.Brush.Color = FillColor;
                g.Brush.Transparency = FillTransparency;

                //Add Rectangle with Transparency
                oldPen = g.Pen.Visible;
                g.Pen.Visible = false;
                g.Rectangle(Utils.FromLTRB(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y));
                g.Pen.Visible = oldPen;
            } 
          }
        }
        else
        {
          g.Line(StartPos.X, StartPos.Y, EndPos.X, EndPos.Y);
        }
      
    }

We also added following additional properties to DrawLine class as :

• IsFilled
  FillColor
  FillTransparency

Do revert for any suggestion or any code changes related to above code snippet.