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ORS isochrones demo Shiny app https://aoles.shinyapps.io/isochrones
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| library(shiny) | |
| library(leaflet) | |
| library(openrouteservice) | |
| ui <- bootstrapPage( | |
| includeScript("busy_indicator.js"), | |
| includeScript("lazy_sliders.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")), | |
| sliderInput("range", "Range [minutes]", 1, 60, 20, 1), | |
| sliderInput("interval", "Interval [minutes]", 1, 60, 20, 1) | |
| ), | |
| div(id = 'loader') | |
| ) | |
| server <- function(input, output, session) { | |
| observe({ | |
| updateSliderInput(session, "interval", max = input$range) | |
| }) | |
| point <- eventReactive(input$map_click, { | |
| data.frame(lng = input$map_click$lng, lat = input$map_click$lat) | |
| }) | |
| output$map <- renderLeaflet({ | |
| leaflet() %>% | |
| addTiles() %>% | |
| setView(8.675581, 49.418579, zoom = 9) | |
| }) | |
| observeEvent(point(), { | |
| leafletProxy("map") %>% | |
| clearMarkers() %>% | |
| addMarkers(point()$lng, point()$lat) | |
| }) | |
| isochrones <- reactive({ | |
| req(point()) | |
| x <- ors_isochrones(point(), | |
| profile = input$profile, | |
| range = input$range * 60, | |
| interval = input$interval * 60) | |
| # set isochrone colors | |
| ranges <- sapply(x$features, function(y) y$properties$value) | |
| pal <- setNames(heat.colors(length(ranges)), ranges) | |
| x$features <- lapply(1:length(x$features), function(i) { | |
| feature <- x$features[[i]] | |
| range <- feature$properties$value | |
| ## set style | |
| col <- unname(pal[as.character(range)]) | |
| feature$properties$style <- list(color = col, fillColor = col, fillOpacity=0.5) | |
| ## restrict polygon to current level only | |
| if (range > ranges[1]) | |
| feature$geometry$coordinates <- | |
| c(feature$geometry$coordinates, x$features[[i-1]]$geometry$coordinates) | |
| feature | |
| }) | |
| x | |
| }) | |
| observe({ | |
| leafletProxy("map") %>% | |
| clearGeoJSON() %>% | |
| addGeoJSON(isochrones()) | |
| }) | |
| } | |
| 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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| /* https://stackoverflow.com/a/47726369/2792099 */ | |
| (function() { | |
| var sliderInputBinding = Shiny.inputBindings.bindingNames['shiny.sliderInput'].binding; | |
| var lazySliderInputBinding = $.extend({}, sliderInputBinding, { | |
| subscribe: function(el, callback) { | |
| var $el = $(el); | |
| var slider = $el.data('ionRangeSlider'); | |
| var handleChange = function() { | |
| if (!inputsInitialized) return; | |
| callback(!$el.data('immediate') && !$el.data('animating')); | |
| }; | |
| slider.update({ | |
| onUpdate: handleChange, | |
| onFinish: handleChange | |
| }); | |
| }, | |
| unsubscribe: function(el, callback) { | |
| var slider = $(el).data('ionRangeSlider'); | |
| slider.update({ | |
| onUpdate: null, | |
| onFinish: null | |
| }); | |
| } | |
| }); | |
| Shiny.inputBindings.register(lazySliderInputBinding, 'shiny.lazySliderInput'); | |
| var inputsInitialized = false; | |
| $(document).one('shiny:connected', function() { | |
| inputsInitialized = true; | |
| }); | |
| })(); |
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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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