使用下面的示例,我试图找到一种方法来为我的闪亮应用添加功能,以便以下工作:
基本上我希望能够点击地图上的电台或用键盘手动输入电台。
这可以用传单吗?我已经看过使用plotly的参考资料,这可能是最终的解决方案,但我很乐意在不小的情况下传单,因为我已经用传单做了很多工作。这类似于question,尽管这里有一个工作示例:
library(shiny)
library(leaflet)
library(shinydashboard)
library(ggplot2)
library(dplyr)
data("quakes")
shinyApp(
ui = dashboardPage(title = "Station Lookup",
dashboardHeader(title = "Test"),
dashboardSidebar(
sidebarMenu(
menuItem("Data Dashboard", tabName = "datavis", icon = icon("dashboard")),
menuItem("Select by station number", icon = icon("bar-chart-o"),
selectizeInput("stations", "Click on Station", choices = levels(factor(quakes$stations)), selected = 10, multiple = TRUE)
)
)
),
dashboardBody(
tabItems(
tabItem(tabName = "datavis",
h4("Map and Plot"),
fluidRow(box(width= 4, leafletOutput("map")),
box(width = 8, plotOutput("plot")))
)
)
)
),
server = function(input, output) {
## Sub data
quakes_sub <- reactive({
quakes[quakes$stations %in% input$stations,]
})
output$plot <- renderPlot({
ggplot(quakes_sub(), aes(x = depth, y = mag))+
geom_point()
})
output$map <- renderLeaflet({
leaflet(quakes) %>%
addTiles() %>%
addCircleMarkers(lng = ~long, lat = ~lat, layerId = ~stations, color = "blue", radius = 3) %>%
addCircles(lng = ~long, lat = ~lat, weight = 1,
radius = 1, label = ~stations,
popup = ~paste(stations, "<br>",
depth, "<br>",
mag)
)
})
}
)
答案 0 :(得分:3)
您可以使用input$map_marker_click
和updateSelectInput()
:
编辑:添加了可以根据评论中的OP建议从selectInput()
删除电台的功能。
(别忘了将session
添加到您的服务器功能中。)
observeEvent(input$stations,{
updateSelectInput(session, "stations", "Click on Station",
choices = levels(factor(quakes$stations)),
selected = c(input$stations))
})
observeEvent(input$map_marker_click, {
click <- input$map_marker_click
station <- quakes[which(quakes$lat == click$lat & quakes$long == click$lng), ]$stations
updateSelectInput(session, "stations", "Click on Station",
choices = levels(factor(quakes$stations)),
selected = c(input$stations, station))
})
但是,此功能部分被弹出事件(?)覆盖。我看到它有一个内部蓝色圆圈(深蓝色),如果点击产生弹出窗口。但是,input$map_marker_click
仅在您单击外部(浅蓝色)圆圈时才有效。我会把它报告为一个bug,......