Rendering Text on Price panel, in an indicator shown on a different panel

[Shai Samuel]

Hi,

I am trying to fix the indicator VPA. I added titles to the symbols, and when using 1 minute timeframe the indicator becomes slow. I guess the reason is the large number of draw objects. So I try to switch to OnRender. The challenge is the indicator at it's base plot volume quantities on separate panel, while recolor and draw text on the price panel. Even with DrawOnPricePanel=true, the DX drawing objects, such as DrawTextLayout or DrawRectangle draw on the indicator panel.

Any supported or unsupported way to solve this?

QuantKey_Bruce, I notice you dealt with this.Any tip?

[QuantKey_Bruce]

Shai Samuel You would have to break out of your normal clipping rectangle to draw outside of the panel your indicator is on. You might want to take a look at this as a starting point: https://forum.ninjatrader.com/forum/...en#post1100886

[Shai Samuel]

Thank you Bruce @QuantKey_Bruce for your quick response, and help. I value that much.
For some reason, I think this drawing tool doesn't function well now. As you can see in the image, it only draw the line on the top half of the chart.
Also, I am not sure I fully understand the trick he use to calculate the adjustment to the desired panel.
Can you try and be more specific?

.

[NinjaTrader_BrandonH]

Hello Shai Samuel,

Thanks for your post.

Indicators are only able to draw on the indicator panel or the price panel when using Draw methods such as Draw.VerticalLine() or Draw.Diamond().

Setting DrawOnPricePanel to true in State.SetDefaults will make all the drawing methods draw to the price panel rather than the indicator panel. If DrawOnPricePanel is set to false in State.SetDefaults, this will make all the drawing methods draw to the indicator panel rather than the price panel.

You will not be able to draw to the sub-panel unless you use custom rendering with SharpDX in the OnRender method. We have an overview of using OnRender here:

https://ninjatrader.com/support/help..._rendering.htm

We are tracking interest in an existing feature request ticket for the support/ability to extend vertical line draw objects to cover all chart panels and I have added your vote to this feature request. This request is being tracked under the number SFT-654.

As with all feature requests, interest is tracked before implementation is considered, so we cannot offer an ETA or promise of fulfillment. If implemented, it will be noted on the Release Notes page of the Help Guide.

Release Notes — https://ninjatrader.com/support/help...ease_notes.htm

[Shai Samuel]

I have solved the issue:

      
//Draw a text at {x;y} coordinates in pixel.
protected void DrawDXString(Gui.Chart.ChartControl chartControl, Gui.Chart.ChartScale chartScale,
    string text, int bar, double val, float xOffset, float yOffset, SimpleFont font, Brush textBrush,
    SharpDX.DirectWrite.TextAlignment textAlignment,
    float width = 0f, int opacity=100, int fontSize=14, bool drawOnPricePanel=false)
{            
    font.Size = (fontSize==0?chartControl.BarWidth*fontFactor:(font.Size!=0?font.Size:fontSize));
    double x = (double)BarToX(bar, chartControl)+xOffset;
    double y = -font.TextFormatHeight/2+yOffset;

    if (!drawOnPricePanel || Panel==0)
         y = PriceToY(val, chartScale)+y;
    else // if (drawOnPricePanel && Panel>0)
    {
        RenderTarget.AntialiasMode    = SharpDX.Direct2D1.AntialiasMode.PerPrimitive;
        // get current panel
        ChartPanel    panel            = chartControl.ChartPanels[chartScale.PanelIndex];

        // Switch Clip to Price chart
        RenderTarget.PopAxisAlignedClip();
           RenderTarget.PushAxisAlignedClip(new SharpDX.RectangleF((float)chartControl.ChartPanels[0].X,
            (float)chartControl.ChartPanels[0].Y, (float)chartControl.ChartPanels[0].W, (float)chartControl.ChartPanels[0].H), RenderTarget.AntialiasMode);

        // get y base on panel[0] - price panel
        foreach(ChartScale cScale in chartControl.ChartPanels[0].Scales)
            if (cScale.PanelIndex==0 && val>=cScale.MinValue && val<=cScale.MaxValue)
                 y = PriceToY(val, cScale)+y;
    }

    DrawDXString(text, x, y, font, textBrush, textAlignment, width, opacity);    

    if (drawOnPricePanel && Panel>0)
    {
        RenderTarget.PopAxisAlignedClip();
           RenderTarget.PushAxisAlignedClip(new SharpDX.RectangleF((float)ChartPanel.X, (float)ChartPanel.Y, (float)ChartPanel.W, (float)ChartPanel.H), RenderTarget.AntialiasMode);
    }
}
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