Add label to annotation rect ggplot - r

Question

I'm making plots behavior changes overtime. I would like to include shaded areas to emphasize some phases. Currently I'm adding shaded areas using annotate("rect" x=POSIXct("")..and then adding annotate("label")...
Is there a way to add the label directly to the shaded area, where the size and wrapping of the label text changes to fit within the shaded area? Or, is there a more efficient way to try to position a label in a date range shaded area?
myDF <- labeled_rectxlsx
> str(myDF)
tibble [37 × 3] (S3: tbl_df/tbl/data.frame)
$ schDate : POSIXct[1:37], format: "2020-10-22" "2020-10-23" "2020-11-09"
"2020-11-12" ...
$ rating : num [1:37] NA NA NA NA NA NA NA NA NA NA ...
$ rect_label: chr [1:37] NA NA NA NA ...
schDate rating rect_label
...
11 2020-12-14 NA <NA>
12 2020-12-15 NA <NA>
13 2020-12-16 NA <NA>
14 2020-12-17 NA <NA>
15 2020-12-18 NA Winter Break
16 2021-01-03 NA <NA>
17 2021-01-04 6 <NA>
18 2021-01-05 8 <NA>
19 2021-01-06 5 <NA>
20 2021-01-07 8 <NA>
21 2021-01-08 7 <NA>
22 2021-01-11 6 <NA>
maxY <- max(labeled_rectxlsx$rating, na.rm=TRUE)
insideY= (maxY*.98)
p <- myDF %>%
ggplot(aes(x= schDate, y=rating))+
geom_point()+
geom_line()+
theme_classic()+
theme(
plot.title = element_text(size=20, face="bold"),
axis.title.x = element_blank(),
axis.title.y = element_text(size=14, face="bold"),
axis.text.x = element_text(size=12),
axis.text.y = element_text(size=12))+
annotate("rect",
xmin = as.POSIXct("2020-12-19"), xmax = as.POSIXct("2021-01-03"),
ymin = -Inf, ymax = Inf, fill = "gray", alpha =.5)+
annotate("label", x=as.POSIXct("2020-12-27"),
y= insideY , label="Winter Break", fill="black", color="white",fontface="bold",
size=4, vjust="inward")
p

Answer 1

To expand on the comment a bit, you could use the ggfittext package with a dummy data.frame to hold the values, in combination with inherit.aes = FALSE.
Example below:
library(ggfittext)
#> Warning: package 'ggfittext' was built under R version 4.0.3
library(ggplot2)
set.seed(0)
myDF <- data.frame(
schDate = seq(Sys.Date() - 100, Sys.Date(), by = "1 day"),
rating = cumsum(rnorm(101))
)
ggplot(myDF, aes(schDate, rating)) +
geom_point() +
geom_line() +
annotate("rect",
xmin = as.Date("2020-12-19"), xmax = as.Date("2021-01-03"),
ymin = -Inf, ymax = Inf, fill = "gray", alpha =.5) +
geom_fit_text(
data = data.frame(xmin = as.Date("2020-12-19"), xmax = as.Date("2021-01-03"),
label = "Winter Break"),
aes(xmin = xmin, xmax = xmax, ymin = 4, ymax = 5, label = label),
inherit.aes = FALSE
)
Created on 2021-02-09 by the reprex package (v1.0.0)