tests/testthat/auto_theme_shiny/local_theme/app.R

In rstudio/thematic: Unified and Automatic 'Theming' of 'ggplot2', 'lattice', and 'base' R Graphics

library(shiny)
library(thematic)

theme_base <- thematic_theme("black", "white", accent = "purple")
theme_ggplot <- thematic_theme("black", "white", accent = "red")
theme_lattice <- thematic_theme("black", "white", accent = "orange")

ui <- fluidPage(
  plotOutput("base"),
  plotOutput("ggplot"),
  plotOutput("lattice")
)

server <- function(input, output, session) {

  output$base <- renderPlot({
    thematic_local_theme(theme_base)
    plot(1:10, 1:10, col = thematic_get_option("accent"))
  })

  output$ggplot <- renderPlot({
    thematic_local_theme(theme_ggplot)
    print(ggplot2::qplot(1:10, 1:10, color = 1:10))
  })

  output$lattice <- renderPlot({
    thematic_local_theme(theme_lattice)
    print(lattice::show.settings())
  })

}

shinyApp(ui, server)