first deploy

.gitignore

@@ -1 +1,2 @@
 .DS_Store
+.Rproj.user

Dockerfile

@@ -1,16 +1,14 @@
+?runApp
 FROM rocker/shiny-verse:latest
 
 WORKDIR /code
 
 # Install stable packages from CRAN
-RUN install2.r --error \
-    ggExtra \
-    shiny
+RUN install2.r --error ggExtra shiny spData terra stars leaflet.extra
 
 # Install development packages from GitHub
-RUN installGithub.r \
-    rstudio/bslib \
-    rstudio/httpuv
+RUN installGithub.r rstudio/leaflet
+
 
 COPY . .
 

app.R

@@ -1,58 +1,42 @@
-library(shiny)
-library(bslib)
-library(dplyr)
-library(ggplot2)
+library(shiny)    # for shiny apps
+library(leaflet)  # renderLeaflet function
+library(spData)   # loads the world dataset 
+library(terra)
+library(stars)
+library(leaflet.extras2)
 
-df <- readr::read_csv("penguins.csv")
-# Find subset of columns that are suitable for scatter plot
-df_num <- df |> select(where(is.numeric), -Year)
-
-ui <- page_sidebar(
-  theme = bs_theme(bootswatch = "minty"),
-  title = "Penguins explorer",
-  sidebar = sidebar(
-    varSelectInput("xvar", "X variable", df_num, selected = "Bill Length (mm)"),
-    varSelectInput("yvar", "Y variable", df_num, selected = "Bill Depth (mm)"),
-    checkboxGroupInput("species", "Filter by species",
-      choices = unique(df$Species), selected = unique(df$Species)
-    ),
-    hr(), # Add a horizontal rule
-    checkboxInput("by_species", "Show species", TRUE),
-    checkboxInput("show_margins", "Show marginal plots", TRUE),
-    checkboxInput("smooth", "Add smoother"),
-  ),
-  plotOutput("scatter")
+ui = fluidPage(
+  leafletOutput(outputId = "map")
 )
 
-server <- function(input, output, session) {
-  subsetted <- reactive({
-    req(input$species)
-    df |> filter(Species %in% input$species)
-  })
 
-  output$scatter <- renderPlot(
-    {
-      p <- ggplot(subsetted(), aes(!!input$xvar, !!input$yvar)) +
-        theme_light() +
-        list(
-          theme(legend.position = "bottom"),
-          if (input$by_species) aes(color = Species),
-          geom_point(),
-          if (input$smooth) geom_smooth()
-        )
+before_fire_tifs <- "/vsicurl/https://huggingface.co/spaces/cboettig/shiny-app/resolve/main/before_fire/cube_d36238205702022-05-25.tif"
+after_fire_tifs <- "/vsicurl/https://huggingface.co/spaces/cboettig/shiny-app/resolve/main/after_fire/cube_d36482e5462022-05-30.tif"
+before_fire_nbr <- read_stars(before_fire_tifs)
+after_fire_nbr <- read_stars(after_fire_tifs)
+dnbr <- before_fire_nbr - after_fire_nbr
 
-      if (input$show_margins) {
-        margin_type <- if (input$by_species) "density" else "histogram"
-        p <- p |> ggExtra::ggMarginal(
-          type = margin_type, margins = "both",
-          size = 8, groupColour = input$by_species, groupFill = input$by_species
-        )
-      }
 
-      p
-    },
-    res = 100
-  )
+server = function(input, output) {
+  output$map = renderLeaflet({
+    #https://trafficonese.github.io/leaflet.extras2/reference/addSidebyside.html
+    
+    # addRasterImage options requires pre-release leaflet....
+    stopifnot(compareVersion(as.character(packageVersion("leaflet")), "2.2.1") > 0)
+    
+    Map <- leaflet() |> 
+      addMapPane("right", zIndex = 0) |> 
+      addMapPane("left",  zIndex = 0) |>
+      addTiles(group = "base", layerId = "baseid1", options = pathOptions(pane = "right")) |> 
+      addTiles(group = "base", layerId = "baseid2", options = pathOptions(pane = "left")) |> 
+      addRasterImage(x = rast(after_fire_nbr), options = leafletOptions(pane = "right"), group = "r1") |> 
+      addRasterImage(x = rast(before_fire_nbr), options = leafletOptions(pane = "left"), group = "r2") |> 
+      addLayersControl(overlayGroups = c("r1", "r2")) |>  
+      addSidebyside(layerId = "sidecontrols",
+                    rightId = "baseid1",
+                    leftId  = "baseid2")
+    
+  })
 }
 
 shinyApp(ui, server)

demo_288.Rproj

@@ -0,0 +1,13 @@
+Version: 1.0
+
+RestoreWorkspace: Default
+SaveWorkspace: Default
+AlwaysSaveHistory: Default
+
+EnableCodeIndexing: Yes
+UseSpacesForTab: Yes
+NumSpacesForTab: 2
+Encoding: UTF-8
+
+RnwWeave: knitr
+LaTeX: pdfLaTeX