获取窗口的闪亮大小 [英] Get the size of the window in Shiny
本文介绍了获取窗口的闪亮大小的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想确定SHILINY中浏览器窗口的大小,以帮助我更好地布局我的绘图div。具体地说,我想确定窗口的纵横比,看看应该在屏幕上铺开多少个div,它看起来还是不错的。我最初的想法是,地块的数量应该是floor(width/(height-navbar_height))
。
推荐答案
参见下面的示例。它使用Javascript检测浏览器窗口大小(初始大小和任何调整大小),并使用Shiny.onInputChange
将数据发送到服务器代码进行处理。它使用shiny:connected
事件获取初始窗口大小,因为Shiny.onInputChange
在连接SHINY之前尚未准备好使用。
library(shiny)
# Define UI for application that draws a histogram
ui <- shinyUI(fluidPage(
# Application title
titlePanel("Old Faithful Geyser Data"),
# Sidebar with a slider input for number of bins
sidebarLayout(
sidebarPanel(
tags$head(tags$script('
var dimension = [0, 0];
$(document).on("shiny:connected", function(e) {
dimension[0] = window.innerWidth;
dimension[1] = window.innerHeight;
Shiny.onInputChange("dimension", dimension);
});
$(window).resize(function(e) {
dimension[0] = window.innerWidth;
dimension[1] = window.innerHeight;
Shiny.onInputChange("dimension", dimension);
});
')),
sliderInput("bins",
"Number of bins:",
min = 1,
max = 50,
value = 30)
),
# Show a plot of the generated distribution
mainPanel(
verbatimTextOutput("dimension_display"),
plotOutput("distPlot")
)
)
))
# Define server logic required to draw a histogram
server <- shinyServer(function(input, output) {
output$dimension_display <- renderText({
paste(input$dimension[1], input$dimension[2], input$dimension[2]/input$dimension[1])
})
output$distPlot <- renderPlot({
# generate bins based on input$bins from ui.R
x <- faithful[, 2]
bins <- seq(min(x), max(x), length.out = input$bins + 1)
# draw the histogram with the specified number of bins
hist(x, breaks = bins, col = 'darkgray', border = 'white')
})
})
# Run the application
shinyApp(ui = ui, server = server)
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