Draw same width as BarWidth

[digibob]

Hi. I'm trying to draw a rectangle in the future (barsAgo = -1) that has same width as the bars. I'm using Draw.Line() rather than Draw.Rectangle().

Draw.Line(this, "rect", false, -1, Open[0], -1, Close[0], Brushes.Cyan, DashStyleHelper.Solid, (int) ChartControl.BarWidth);

According to the docs ChartControl.BarWidth and the Draw.Line's width parameter both are in pixels. I assumed the drawn line would have similar width to the bars but it doesn't.

I tried converting application pixels to device pixels--

int devicePixelsWidth    = ChartingExtensions.ConvertToHorizontalPixels(ChartControl.BarWidth, ChartControl.PresentationSource);
Draw.Line(this, "rect", false, -1, Open[0], -1, Close[0], Brushes.Cyan, DashStyleHelper.Solid, devicePixelsWidth);

The result didn't change.

Re-scaling, reloading, whatever the width of the bars, the line is always narrower.

[NinjaTrader_Kate]

Hello digibob,

Thank you for your note.

It appears that the BarWidth parameter is the width in pixels of each side of the bar from the center to the outer edge. There's actually two ways to fix this: First, you can just multiply ChartControl.BarWidth by 2 and that should work:

           Draw.Line(this, "rect", false, -1, Open[0], -1, Close[0], Brushes.Cyan, DashStyleHelper.Solid, (int) (ChartControl.BarWidth *2));

Or, more directly, ChartControl.GetBarPaintWidth() will get you the full bar paint width:

            double barPixelWidth = ChartControl.GetBarPaintWidth(ChartControl.BarsArray[0]);
            Draw.Line(this, "rect", false, -1, Open[0], -1, Close[0], Brushes.Cyan, DashStyleHelper.Solid, (int) (barPixelWidth));

Either one of those options should work for you.

Please let us know if we may be of further assistance to you.

[digibob]

Hi Kate. Perfect. Many thanks.