How to draw text above some level correctly

[rfsettling]

Hello, I need to draw some horizontal line and then the text above it in OnRender method

for drawing line I use

RenderTarget.DrawLine(new Vector2(x1, y), new Vector2(x2, y), lineBrush, lineWidth);

Then I use this code to draw text above the line

SimpleFont wpfFont = chartControl.Properties.LabelFont ?? new SimpleFont();
using (var textFormat = wpfFont.ToDirectWriteTextFormat())
{
   using (TextLayout textLayout = new TextLayout(
      Globals.DirectWriteFactory,
      MyText,
      textFormat, 1, textFormat.FontSize))
    {
       RenderTarget.DrawTextLayout(new Vector2(x1, y), textLayout, textBrush, DrawTextOptions.NoSnap);
     }
}

The text appears under the line because my y coordinate = top of the text rectangle by default. How can I tell to DrawTextLayout routine that my y coordinate is a bottom of the text rectangle?

[NinjaTrader_Jim]

Hello rfsettling,

Thanks for your inquiry.

The solution would be to measure the font height from the TextLayout and then to use that value to offset the DrawTextLayout()'s y-coordinate.

I've attached some sample code and a working example that uses it.

private int CheckFontHeight(SimpleFont font)
{
	int Height = 0;
	
	SharpDX.DirectWrite.TextFormat textFormat = font.ToDirectWriteTextFormat();
	SharpDX.DirectWrite.TextLayout textLayout =
		new SharpDX.DirectWrite.TextLayout(NinjaTrader.Core.Globals.DirectWriteFactory,
		"", textFormat, ChartPanel.X + ChartPanel.W,
		textFormat.FontSize);

  	Height =  (int)textLayout.Metrics.Height;

	textLayout.Dispose();
	textFormat.Dispose();
	
	return Height;
}

If you have any additional questions, please don't hesitate to write back.

[rfsettling]

Hello, Jim

I hoped there is a vertical alignment setting which I just could not find. Having vertical alignment would make the life easier...

Anyway, thanks!

[balltrader]

thank Jim, this gave me an idea