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if(interactive()) {
library(leaflet)
library(leaftime)
library(htmltools)
#Build data.frame with 10 obs + 3 cols
power <- data.frame(
"Latitude" = c(
33.515556, 38.060556, 47.903056, 49.71, 49.041667, 31.934167,
54.140586, 54.140586, 48.494444, 48.494444
),
"Longitude" = c(
129.837222, -77.789444, 7.563056, 8.415278, 9.175, -82.343889,
13.664422, 13.664422, 17.681944, 17.681944
),
"start" = seq.Date(as.Date("2015-01-01"), by = "day", length.out = 10),
"end" = seq.Date(as.Date("2015-01-01"), by = "day", length.out = 10) + 1
)
# use geojsonio to convert our data.frame
# to GeoJSON which timeline expects
power_geo <- geojsonio::geojson_json(power,lat="Latitude",lon="Longitude")
# we can add data in addTimeline
leaflet() %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline(data = power_geo)
# or we can add data in leaflet()
leaflet(power_geo) %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline()
# we can control the slider controls through sliderOptions
leaflet(power_geo) %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline(
sliderOpts = sliderOptions(
formatOutput = htmlwidgets::JS(
"function(date) {return new Date(date).toDateString()}
"),
position = "bottomright",
step = 10,
duration = 3000,
showTicks = FALSE
)
)
# we can control the timeline through timelineOptions
# wondering what should be the default
# currently timeline uses marker
leaflet(power_geo) %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline(
timelineOpts = timelineOptions(
pointToLayer = htmlwidgets::JS(
"
function(data, latlng) {
return L.circleMarker(latlng, {
radius: 3
})
}
"
)
)
)
# change styling manually
leaflet(power_geo) %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline(
timelineOpts = timelineOptions(
pointToLayer = htmlwidgets::JS(
"
function(data, latlng) {
return L.circleMarker(latlng, {
radius: 10,
color: 'black',
fillColor: 'pink',
fillOpacity: 1
})
}
"
)
)
)
# change style with styleOptions helper function
# this will change style for all points
leaflet(power_geo) %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline(
timelineOpts = timelineOptions(
styleOptions = styleOptions(
radius = 10,
color = "black",
fillColor = "pink",
fillOpacity = 1
)
)
)
# to style each point differently based on the data
power_styled <- power
# IE does not like alpha so strip colors of alpha hex
power_styled$color <- substr(topo.colors(6)[ceiling(runif(nrow(power),0,6))],1,7)
power_styled$radius <- ceiling(runif(nrow(power),3,10))
leaflet(geojsonio::geojson_json(power_styled)) %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addCircleMarkers(
data = power_styled, lat = ~Latitude, lng = ~Longitude, radius = 11
) %>%
addTimeline(
timelineOpts = timelineOptions(
styleOptions = styleOptions(
radius = htmlwidgets::JS("function getRadius(d) {return +d.properties.radius}"),
color = htmlwidgets::JS("function getColor(d) {return d.properties.color}"),
fillOpacity = 1,
stroke = FALSE
)
)
)
# we can use onchange to handle timeline change event
leaflet(power_geo) %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline(
onchange = htmlwidgets::JS("function(e) {console.log(e, arguments)}")
)
leaflet(power_geo, elementId = "leaflet-wide-timeline") %>%
addTiles() %>%
setView(44.0665,23.74667,2) %>%
addTimeline(
width = "96%"
)
}
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