lib/mnit: add `centered` to blit_number

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/lib/mnit/numbers.nit b/lib/mnit/numbers.nit
index e7462b4..f3bdece 100644 (file)
--- a/lib/mnit/numbers.nit
+++ b/lib/mnit/numbers.nit
@@ -37,9 +37,22 @@ redef class App
 end
 
 redef class Display
-       fun blit_number(imgs: NumberImages, number: Int, x, y: Int)
+       fun blit_number(imgs: NumberImages, number: Int, x, y: Int, centered: nullable Bool)
        do
                var str = number.to_s
+
+               if centered == true then
+                       var w = 0
+                       for c in str.chars do
+                               var d = c.code_point-'0'.code_point
+                               var img = imgs.imgs[d]
+                               w += (img.width.to_f * img.scale).to_i
+                       end
+                       x -= w / 2
+                       var img = imgs.imgs.first
+                       y -= (img.width.to_f * img.scale).to_i / 2
+               end
+
                for c in str.chars do
                        var d = c.code_point-'0'.code_point
                        assert d >= 0 and d <= 9