title: ToolTip when you mouseover a ggplot on shiny
body: <p>I am building a shiny application.</p>
  
  <p>I am plotting charts using ggplot.</p>
  
  <p>When I mouseover the points on the graph, I want a tooltip showing one of the columns in the data frame (customizable tooltip)</p>
  
  <p>Can you please suggest the best way forward.</p>
  
  <p>Simple App:</p>
  
  <pre><code># ui.R
  
  shinyUI(fluidPage(
   sidebarLayout(
      sidebarPanel(
          h4("TEst PLot")),
      mainPanel(
          plotOutput("plot1")
      )
  )
  ))
  
  # server.R
  
  library(ggplot2)
  data(mtcars)
  
  shinyServer(
  function(input, output) {
      output$plot1 &lt;- renderPlot({
          p &lt;- ggplot(data=mtcars,aes(x=mpg,y=disp,color=factor(cyl)))
          p &lt;- p + geom_point()
          print(p)
      })
  }
  )
  </code></pre>
  
  <p>When I mouse over the points, I want it to show mtcars$wt</p>