update README and font size guide (#10)

Author: Polkas

NEWS.md

@@ -1,5 +1,7 @@
 # gridify 0.7.6.9000
 
+* Updated `README.md` file.
+* Updated description how to convert points to pixels, example in `README.md` file.
 * Removed `rtables` examples as installation of `rtables.officer` requires R >= 4.4.0.
 
 # gridify 0.7.6

R/layout_issues.R

@@ -71,7 +71,7 @@
 #' unit pixels (`px`), whilst the `grid` package, on which `gridify` is built,
 #' assumes points (`pt`). As a result, even if you set the font sizes in both
 #' `gt` and `gridify` (using `grid::gpar()`) to the same number, they may
-#' still appear different. To convert point size to pixel size, multiply the point size by 4/3.
+#' still appear different. To convert point size to pixel size, multiply the point size by `96 / 72`.
 #'
 #' @name layout_issue
 NULL

README.md

@@ -75,7 +75,10 @@ tab <- gt::gt(head(mtcars, n = 10))  |>
     table.width = gt::pct(100),
     data_row.padding = gt::px(10),
     table_body.hlines.color = "white",
-    table.font.size = 12
+    # gt font size is in pixels
+    # Multiply points by 96/72 to get pixels
+    table.font.size = 10 * 96 / 72,
+    table.font.names = "sans"
   )
 
 # Use `gridify()` to create a `gridify` object
@@ -84,7 +87,7 @@ gridify_object <- gridify(
   # Choose a layout (predefined or custom)
   layout = pharma_layout_base(
     margin = grid::unit(c(0.5, 0.5, 0.5, 0.5), "inches"),
-    global_gpar = grid::gpar(fontfamily = "serif", fontsize = 10)
+    global_gpar = grid::gpar(fontfamily = "sans", fontsize = 10)
   )
 )
 # Print the `gridify` object to see empty cells