406 data mapping factors

[pchelle]

This PR is necessary for the fixing reporting engine issue 985

Briefly explained, the function getDefaultCaptions() is responsible for creating internally the legend captions in most of the plots.
Since the factor levels were lost before, the legend was always re-ordered by alphabetical order, usually messing up initial legend.

With this fix, you can set up the legend correct order from the data itself (which is convenient if you want to associate a specific color or shape to your legend).

Here is a simple illustration:

data <- data.frame(
    x = rnorm(100),
    y = rlnorm(100),
    legend = rep(c("b", "a"), 50)
)

plotPKRatio(
    data = data, 
    dataMapping = PKRatioDataMapping$new(x = "x", y = "y", group = "legend")
    )

data$legend <- factor(data$legend, levels = c("b", "a"))

plotPKRatio(
    data = data, 
    dataMapping = PKRatioDataMapping$new(x = "x", y = "y", group = "legend")
    )

[codecov-commenter]

Codecov Report

Base: 62.54% // Head: 62.66% // Increases project coverage by +0.11% 🎉

Coverage data is based on head (b431da8) compared to base (176c0da).
Patch coverage: 95.45% of modified lines in pull request are covered.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #407      +/-   ##
===========================================
+ Coverage    62.54%   62.66%   +0.11%     
===========================================
  Files           60       60              
  Lines         3786     3787       +1     
===========================================
+ Hits          2368     2373       +5     
+ Misses        1418     1414       -4     

Impacted Files	Coverage Δ
R/observed-data-mapping.R	0.00% <ø> (ø)
R/timeprofile-datamapping.R	50.00% <ø> (+2.38%)	⬆️
R/utilities-mapping.R	46.51% <95.45%> (+2.15%)	⬆️

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.