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ORS directions demo Shiny app https://aoles.shinyapps.io/directions
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| library(shiny) | |
| library(leaflet) | |
| library(openrouteservice) | |
| ## User interface definition | |
| ui <- bootstrapPage( | |
| includeScript("busy_indicator.js"), | |
| includeCSS("style.css"), | |
| leafletOutput("map", width = "100%", height = "100%"), | |
| absolutePanel(top = 10, right = 10, id="controls", | |
| selectInput("profile", "Profile", c(driving = "driving-car", | |
| cycling = "cycling-regular", | |
| walking = "foot-walking")), | |
| conditionalPanel( | |
| condition = "input.profile == 'driving-car'", | |
| checkboxInput("highways", "Avoid highways", value = FALSE) | |
| ), | |
| conditionalPanel( | |
| condition = "input.profile != 'driving-car'", | |
| checkboxInput("steps", "Avoid steps", value = FALSE) | |
| ) | |
| ), | |
| div(id = 'loader') | |
| ) | |
| ## Application logic | |
| server <- function(input, output) { | |
| ## Draw map | |
| output$map <- renderLeaflet({ | |
| leaflet() %>% | |
| addTiles() %>% | |
| setView(8.675581, 49.418579, zoom = 9) | |
| }) | |
| ## Capture clicks and save their coordinates | |
| points <- reactiveVal(NULL) | |
| observeEvent(input$map_click, { | |
| if (nrow(points())>=2 || is.null(points())) { | |
| points(data.frame(lng = input$map_click$lng, lat = input$map_click$lat)) | |
| leafletProxy("map") %>% clearGeoJSON() | |
| } | |
| else { | |
| points(rbind(points(), c(input$map_click$lng, input$map_click$lat))) | |
| } | |
| leafletProxy("map") %>% clearMarkers() %>% addMarkers(points()$lng, points()$lat) | |
| }, ignoreNULL = TRUE) | |
| ## Get routing options | |
| avoid <- reactive({ | |
| if (input$profile == 'driving-car') { | |
| if (isTRUE(input$highways)) | |
| "highways" | |
| } | |
| else if (isTRUE(input$steps)) | |
| "steps" | |
| }) | |
| ## Compute route | |
| route <- reactive({ | |
| req(points()) | |
| if (nrow(points()) %% 2 == 0) | |
| ors_directions(coordinates = points(), | |
| profile = input$profile, | |
| options = list(avoid_features = avoid()), | |
| format = "geojson") | |
| }) | |
| ## Draw route on map | |
| observeEvent(route(), { | |
| leafletProxy("map") %>% | |
| clearGeoJSON() %>% | |
| addGeoJSON(route(), fill=FALSE) | |
| }) | |
| } | |
| shinyApp(ui, server) |
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| $(function() { | |
| $(document).on({ | |
| 'shiny:busy': function(event) { | |
| $('#loader').show(); | |
| }, | |
| 'shiny:idle': function(event) { | |
| $('#loader').hide(); | |
| } | |
| }); | |
| }); |
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| html, body { | |
| width: 100%; | |
| height: 100%; | |
| } | |
| #controls { | |
| background: rgba(255, 255, 255, 0.8); | |
| padding: 10px; | |
| border-radius: 5px; | |
| } | |
| /* Center the loader */ | |
| #loader { | |
| position: absolute; | |
| left: 50%; | |
| top: 50%; | |
| z-index: 1; | |
| width: 150px; | |
| height: 150px; | |
| margin: -75px 0 0 -75px; | |
| border: 16px solid #f3f3f3; | |
| border-radius: 50%; | |
| border-top: 16px solid #3498db; | |
| -webkit-animation: spin 2s linear infinite; | |
| animation: spin 2s linear infinite; | |
| } | |
| @-webkit-keyframes spin { | |
| 0% { -webkit-transform: rotate(0deg); } | |
| 100% { -webkit-transform: rotate(360deg); } | |
| } | |
| @keyframes spin { | |
| 0% { transform: rotate(0deg); } | |
| 100% { transform: rotate(360deg); } | |
| } |
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