Draw text for graph axis description - skiasharp

Question

I am drawing a graph using SkiaSharp. Now I want to add the axis description (Monday, Tuesday, ...) on the X-Axis.
The important code here is:
foreach(string key in surveyAnswers.Keys)
{
SKPath currentTextPath = new SKPath();
currentTextPath.MoveTo((float)(info.Width * borderOffset + i * xStepSize - 70), (float)(info.Height * borderOffset + (answerPossibilitiesCount - 1) * yStepSize + 70));
currentTextPath.RLineTo(70, -70);
canvas.DrawTextOnPath(key, currentTextPath, 0, 0, paint);
i++;
}
It provides me with correctly positioned path, on which I am drawing the text. The problem is that the path has a fixed length. I am making it 70 high and wide, which leaves space on shorter texts and cuts the longer ones.
An example can be found here.
I have thought of a few ways to solve the issue, though none work, since they require unsupported operations or information that I do not have.
How can I align the text with the graph?

Answer 1

I have solved it with a pathLength variable which depends on the font size and the text length.
float pathLenght = (float)((key.Length * (17.0f/25.0f * textSize)) / Math.Sqrt(2));
The ratio of 17/25 seems to work just fine on many font sizes.
Just if anyone could need it I post the code above with inserted solution
foreach(string key in surveyAnswers.Keys)
{
float pathLenght = (float)((key.Length * (17.0f/25.0f * textSize)) / Math.Sqrt(2));
SKPath currentTextPath = new SKPath();
currentTextPath.MoveTo((float)(info.Width * borderOffset + i * xStepSize - pathLenght), (float)(info.Height * borderOffset + (answerPossibilitiesCount - 1) * yStepSize + pathLenght));
currentTextPath.RLineTo(pathLenght, -pathLenght);
canvas.DrawTextOnPath(key, currentTextPath, 0, 0, paint);
i++;
}