我在一个闪亮的应用程序中使用datatables包并且它运行良好,但是当我编辑单元格/值时,焦点从当前行更改为第一行.该表很长,因此必须滚动回正在编辑的行是一个问题.有没有办法选择某一行？然后我可以在表重新加载后返回正在编辑的行.
这是有光泽的数据表渲染的代码.有什么建议吗？
output$book_table <- DT::renderDT(RVTables$book %>%
filter(deal == as.numeric(input$deal_choice)),
selection = 'single',
editable = TRUE,
rownames = FALSE,
options = list(
autoWidth = TRUE,
ordering = FALSE,
pageLength = 12,
scrollX = TRUE,
scrollY = TRUE,
bLengthChange = FALSE,
searching = FALSE
)
)
编辑:
我找到了一种选择行的方法,但我无法动态更新它.
row_edit<-3
output$book_table <- DT::renderDT(RVTables$book %>%
filter(deal == as.numeric(input$deal_choice)),
selection = list(mode='single',selected=row_edit)
editable = TRUE,
rownames = FALSE,
options = list(
autoWidth = TRUE,
ordering = FALSE,
pageLength = 12,
scrollX = TRUE,
scrollY = TRUE,
bLengthChange = FALSE,
searching = FALSE
)
)
并且在编辑事件中使用全局赋值也没有奏效:
row_edit<<- 22
编辑
这是一个示例应用程序,以显示我正在尝试做什么.编辑第42行,例如,查看第一页上突出显示的下一行是如何返回的,如果您想多次编辑单个值以查看效果,这会很烦人.
library(shiny)
library(shinyjs)
library(tidyverse)
library(DT) #load after shiny
data_input <- data.frame(ID=seq(1,50),
weight=sample(50:65,50,replace = TRUE),
height=sample(150:225,50,replace = TRUE)
)
#shiny---
shinyApp(
#ui----
ui= fluidPage(
fluidRow(
br(),
column(2,
actionButton("increase_weight","increase weight"),
uiOutput("show_row_selected"),
uiOutput("last_row_selected")
),
column(4,DT::DTOutput("data_table"))
)
),
server=function(input,output,session){
#save data frame as a reactive value
RV <- reactiveValues(
data=data_input
)
#try to save last row selected----
row_select <- reactive({
#case when code below fails, use row 3 to illustrate code
3
#uncomment code below and run to see error
# case_when(
# #valid row selected
# length(input$data_table_rows_selected)>0 ~ as.numeric(input$data_table_rows_selected),
# #after update, row object is empty to use last selected row
# #this is now recursive and app fails - "evaluation nested too deeply: infinite recursion...."
# length(input$data_table_rows_selected)==0 ~ row_select()
# )
})
#render data frame for output
output$data_table <- DT::renderDT(RV$data,
selection = list(mode="single",selected=row_select()),
editable = TRUE,
rownames = FALSE,
options=list(
autoWidth=TRUE,
scrollX = TRUE,
ordering=FALSE,
pageLength=12,
scrollY = TRUE,
bLengthChange= FALSE,
searching=FALSE
)
)
#edit a single cell----
observeEvent(input$data_table_cell_edit, {
info <- input$data_table_cell_edit
edit_row <- info$row
edit_col <- info$col+1 # column index offset by 1
edit_value <- info$value
#find leg to be edited
ID <- edit_row
RV$data[ID,edit_col] <-as.numeric(edit_value)
})
#increase weight by one----
observeEvent(input$increase_weight, {
edit_row <- input$data_table_rows_selected
RV$data[edit_row,"weight"] <- RV$data[edit_row,"weight"]+1
})
#show current row selected----
output$show_row_selected <- renderText({
paste0("row selected: ",as.character(as.numeric(input$data_table_rows_selected)))
})
#show last row selected----
output$last_row_selected <- renderText({
paste0("row selected: ",as.character(row_select()))
})
})
在这个问题的帮助下，这里有一些有效的代码。
library(shiny)
library(shinyjs)
library(tidyverse)
library(DT) #load after shiny
data_input <- data.frame(ID=seq(1,50),
weight=sample(50:65,50,replace = TRUE),
height=sample(150:225,50,replace = TRUE)
)
#shiny---
shinyApp(
#ui----
ui= fluidPage(
fluidRow(
br(),
column(2,
actionButton("increase_weight","increase weight"),
uiOutput("show_row_selected")
),
column(4,DT::DTOutput("data_table"))
)
),
server=function(input,output,session){
#save data frame as a reactive value
RV <- reactiveValues(
data=data_input
)
previousSelection <- NULL
previousPage <- NULL
#render data table
output$data_table <- DT::renderDataTable({
DT::datatable(
RV$data,
editable = TRUE,
selection = list(mode = "single", target = "row", selected = previousSelection),
options = list(
autoWidth=TRUE,
scrollX = TRUE,
pageLength = 10,
displayStart = previousPage))
})
#edit a single cell----
observeEvent(input$data_table_cell_edit, {
info <- input$data_table_cell_edit
edit_row <- info$row
edit_col <- info$col
edit_value <- info$value
previousSelection <<- input$data_table_rows_selected
previousPage <<- input$data_table_rows_current[1] - 1
#find leg to be edited
RV$data[edit_row,edit_col] <-as.numeric(edit_value)
})
#increase weight by one----
observeEvent(input$increase_weight, {
edit_row <- input$data_table_rows_selected
previousSelection <<- input$data_table_rows_selected
previousPage <<- input$data_table_rows_current[1] - 1
RV$data[edit_row,"weight"] <- RV$data[edit_row,"weight"]+1
})
#show current row selected----
output$show_row_selected <- renderText({
paste0("row selected: ",as.character(as.numeric(input$data_table_rows_selected)))
})
})