如何用actionButton重置Shiny中plotly点击子集化的图表至初始状态

要给你的Shiny应用添加重置按钮，让所有图表恢复初始显示状态，需要通过统一管理选中状态的方式实现，具体修改如下：

核心修改点 #

• 新增selected_date这个reactiveVal来存储用户点击选中的日期，初始值为NULL
• 监听三个图表的点击事件，更新selected_date的值
• 重置按钮点击时，将selected_date设为NULL，触发所有图表重新加载完整数据
• 调整三个图表的渲染逻辑，基于selected_date筛选数据，替代原来直接判断event_data的逻辑

修改后的完整代码 #

library(shiny)
library(shinydashboard)
library(plotly)
library(dplyr)
library(ggplot2)
library(bupaR)

pr59<-structure(list(case_id = c("WC4120721", "WC4120667", "WC4120689", 
                                 "WC4121068", "WC4120667", "WC4120666", "WC4120667", "WC4121068", 
                                 "WC4120667", "WC4121068"), lifecycle = c(110, 110, 110, 110, 
                                                                          120, 110, 130, 120, 10, 130), action = c("WC4120721-CN354877", 
                                                                                                                   "WC4120667-CN354878", "WC4120689-CN356752", "WC4121068-CN301950", 
                                                                                                                   "WC4120667-CSW310", "WC4120666-CN354878", "WC4120667-CSW308", 
                                                                                                                   "WC4121068-CSW303", "WC4120667-CSW309", "WC4121068-CSW308"), 
                     activity = c("Forged Wire, Medium (Sport)", "Forged Wire, Medium (Sport)", 
                                  "Forged Wire, Medium (Sport)", "Forged Wire, Medium (Sport)", 
                                  "BBH-1&2", "Forged Wire, Medium (Sport)", "TCE Cleaning", 
                                  "SOLO Oil", "Tempering", "TCE Cleaning"), resource = c("3419", 
                                                                                         "3216", "3409", "3201", "C3-100", "3216", "C3-080", "C3-030", 
                                                                                         "C3-090", "C3-080"), timestamp = structure(c(1606964400, 
                                                                                                                                      1607115480, 1607435760, 1607568120, 1607630220, 1607670780, 
                                                                                                                                      1607685420, 1607710800, 1607729520, 1607744100), tzone = "", class = c("POSIXct", 
                                                                                                                                                                                                             "POSIXt")), .order = 1:10), row.names = c(NA, -10L), class = c("eventlog", 
                                                                                                                                                                                                                                                                            "log", "tbl_df", "tbl", "data.frame"), spec = structure(list(
                                                                                                                                                                                                                                                                              cols = list(case_id = structure(list(), class = c("collector_character", 
                                                                                                                                                                                                                                                                                                                                "collector")), lifecycle = structure(list(), class = c("collector_double", 
                                                                                                                                                                                                                                                                                                                                                                                       "collector")), action = structure(list(), class = c("collector_character", 
                                                                                                                                                                                                                                                                                                                                                                                                                                           "collector")), activity = structure(list(), class = c("collector_character", 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 "collector")), resource = structure(list(), class = c("collector_character", 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       "collector")), timestamp = structure(list(), class = c("collector_character", 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              "collector"))), default = structure(list(), class = c("collector_guess", 
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    "collector")), delim = ";"), class = "col_spec"), case_id = "case_id", activity_id = "activity", activity_instance_id = "action", lifecycle_id = "lifecycle", resource_id = "resource", timestamp = "timestamp")
ui <- tags$body(
  dashboardPage(
    header = dashboardHeader(), 
    sidebar = dashboardSidebar(
      actionButton("res","RESET")
    ), 
    body = dashboardBody(
      plotlyOutput("plot1"),
      plotlyOutput("plot2"),
      plotlyOutput("plot3")
    )
  )
)

server <- function(input, output, session) {
  # 用reactiveVal统一管理选中的日期状态
  selected_date <- reactiveVal(NULL)
  
  # 监听三个图表的点击事件，更新选中日期
  observeEvent(event_data("plotly_click", source = "myPlotSource1"), {
    selected_date(as.Date(event_data("plotly_click", source = "myPlotSource1")$customdata))
  })
  
  observeEvent(event_data("plotly_click", source = "myPlotSource2"), {
    selected_date(as.Date(event_data("plotly_click", source = "myPlotSource2")$customdata))
  })
  
  observeEvent(event_data("plotly_click", source = "myPlotSource3"), {
    selected_date(as.Date(event_data("plotly_click", source = "myPlotSource3")$customdata))
  })
  
  # 重置按钮点击事件：清空选中日期
  observeEvent(input$res, {
    selected_date(NULL)
  })
  
  output$plot1 <- renderPlotly({
    # 根据选中日期筛选数据
    displaydat <- if (!is.null(selected_date())) {
      subset(pr59, as.Date(timestamp) == selected_date())
    } else {
      pr59
    }
    dat <- displaydat |> group_by(date = as.Date(timestamp)) |> bupaR::n_cases()
    p <- ggplot(data = dat, aes(x = date, y = n_cases, customdata = date)) +
      geom_area(fill = "#69b3a2", alpha = 0.4) +
      geom_line(color = "#69b3a2", size = 0.5) +
      geom_point(size = 1, color = "#69b3a2") + scale_color_grey() + theme_classic() +
      labs(title = "Cases per month", x = "timestamp", y = "Cases")
    ggplotly(p, source = "myPlotSource1")
  })
  
  output$plot2 <- renderPlotly({
    displaydat <- if (!is.null(selected_date())) {
      subset(pr59, as.Date(timestamp) == selected_date())
    } else {
      pr59
    }
    dat <- displaydat|> group_by(date = as.Date(timestamp)) |> bupaR::n_cases()
    
    p <- ggplot(data = dat, aes(x = date, y = n_cases, customdata = date)) +
      geom_area(fill = "#69b3a2", alpha = 0.4) +
      geom_line(color = "#69b3a2", size = 0.5) +
      geom_point(size = 1, color = "#69b3a2") + scale_color_grey() + theme_classic() +
      labs(title = "Cases per month", x = "timestamp", y = "events")
    ggplotly(p, source = "myPlotSource2")
  })
  
  output$plot3 <- renderPlotly({
    displaydat <- if (!is.null(selected_date())) {
      subset(pr59, as.Date(timestamp) == selected_date())
    } else {
      pr59
    }
    dat <- displaydat |> group_by(date = as.Date(timestamp)) |> bupaR::n_cases()
    
    p <- ggplot(data = dat, aes(x =date, y = n_cases, customdata = date)) +
      geom_area(fill = "#69b3a2", alpha = 0.4) +
      geom_line(color = "#69b3a2", size = 0.5) +
      geom_point(size = 1, color = "#69b3a2") + scale_color_grey() + theme_classic() +
      labs(title = "Cases per month", x = "timestamp", y = "objects")
    ggplotly(p, source = "myPlotSource3")
  })
}

shinyApp(ui, server)

内容的提问来源于stack exchange，提问作者firmo23