Using MonoTouch.CoreText to draw multi-line text - ios

Question

I used that examples
http://developer.xamarin.com/recipes/ios/graphics_and_drawing/core_text/draw_unicode_text_with_coretext/
Using MonoTouch.CoreText to draw text fragments at specific coordinaates
to draw a text line over UIView.
Now I need to extend it to draw multi-line text. Basically is simple. In the Draw() method I split the multi-line string Text on "\n" and than I call DrawTextLine() for any single line adding a newLineDY to Y.
The only problem is that any new line draw starts after the X draw end of the previous one:
aaa
bbb
ccc
How to avoid the X displacement? Can be reset? How? I try appling a negative DX for any line, but I don't know the right value to apply.
private const float newLineDY = 40;
public override void Draw()
{
string[] lines = Text.Split("\n".ToCharArray());
float lx = X;
float ly = Y;
foreach (string line in lines)
{
DrawTextLine(line, lx, ly);
//lx -= 100; // negative DX
ly += newLineDY;
}
}
private void DrawTextLine(string text, float x, float y)
{
CGContext gctx = UIGraphics.GetCurrentContext();
gctx.SaveState();
gctx.TranslateCTM(x, y);
//gctx.TextPosition = new CGPoint(x, y);
gctx.ScaleCTM(1, -1);
//gctx.RotateCTM((float)Math.PI * 315 / 180);
gctx.SetFillColor(UIColor.Black.CGColor);
var attributedString = new NSAttributedString(text,
new CTStringAttributes
{
ForegroundColorFromContext = true,
Font = new CTFont("Arial", 24)
});
using (CTLine textLine = new CTLine(attributedString))
{
textLine.Draw(gctx);
}
gctx.RestoreState();
}
Thaks!

Answer 1

I have solved using attributedString.DrawString(new CGPoint(x, y)), a much simpler API, as suggested here
http://monotouch.2284126.n4.nabble.com/Using-MonoTouch-CoreText-to-draw-text-fragments-at-specific-coordinates-td4658531.html
So my code became:
private const float newLineDY = 40;
public override void Draw()
{
string[] lines = Text.Split("\n".ToCharArray());
float lx = X;
float ly = Y;
foreach (string line in lines)
{
DrawTextLine(line, lx, ly);
ly += newLineDY;
}
}
private void DrawTextLine(string text, float x, float y)
{
NSAttributedString attributedString = new NSAttributedString(
text,
new CTStringAttributes
{
ForegroundColorFromContext = true,
Font = new CTFont("Arial", 24)
});
attributedString.DrawString(new CGPoint(x, y));
}