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app.R
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app.R
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library(shiny)
library(tidyverse)
library(gganimate)
library(gifski)
library(png)
source("keypress_handler.R")
source("helpers.R")
source("plots.R")
theme_set(theme_minimal())
options(shiny.maxRequestSize = 1 * 1024 ^ 3)
colors <- c("#F8766D", "#7CAE00", "#00BFC4")
ui <- pageWithSidebar(
headerPanel("Shiny Eyes"),
sidebarPanel(
fileInput("input_filepath", "Data File",
accept = c("text/csv", "text/comma-separated-values,text/plain", ".csv")),
fileInput("existing_codes", "Import Existing Codes",
accept = c("text/csv", "text/comma-separated-values,text/plain", ".csv")),
selectInput("grouping_variables", "Grouping Variables", NULL, multiple = TRUE),
selectInput("sample_variable", "Sample Variable", NULL, multiple = FALSE),
selectInput("x_variable", "Gaze X Variable", NULL, multiple = FALSE),
selectInput("y_variable", "Gaze Y Variable", NULL, multiple = FALSE),
textInput("window_1_name", "Window 1 Name", value = "Fixation"),
textInput("window_2_name", "Window 2 Name", value = "Saccade"),
textInput("window_3_name", "Window 3 Name", value = "Blink"),
textInput("gaze_x_scale_min", "Gaze Gif X Scale Min", value = "0"),
textInput("gaze_x_scale_max", "Gaze Gif X Scale Max", value = "1920"),
textInput("gaze_y_scale_min", "Gaze Gif Y Scale Min", value = "0"),
textInput("gaze_y_scale_max", "Gaze Gif Y Scale Max", value = "1080"),
textInput("n_frames", "Gaze Gif nFrames", value = "18"),
textInput("percent_skip", "Percent to skip (0-100)", value = 5),
downloadButton("download_data", "Download Data")
),
mainPanel(
tags$script(keypress_handler),
textOutput("chunk_name"),
actionButton("prev_chunk", "Prev Chunk"),
actionButton("undo_brush", "Undo Window"),
actionButton("clear_brush", "Clear Windows"),
actionButton("next_chunk", "Next Chunk"),
actionButton("skip", "Skip Ahead"),
plotOutput("trace_plot", brush = brushOpts(id = "image_brush", direction = "x"), hover = "trace_hover"),
actionButton("render_gif_button", "Render Gaze Gif"),
actionButton("hide_gif_button", "Hide Gaze Gif"),
plotOutput("gaze_gif")
)
)
server <- function(input, output, session) {
lazy_loaded_data <- reactive({
if (!is.null(input$input_filepath$datapath)) {
data <- read_csv(input$input_filepath$datapath)
} else {
data <- NULL
}
data
})
lazy_loaded_codes <- reactive({
if (!is.null(input$existing_codes$datapath)) {
data <- read_csv(input$existing_codes$datapath)
} else {
data <- NULL
}
data
})
observe({
if (!is.null(input$input_filepath)) {
# Empty string tops list, so events only fire when values are actively changed by the user
column_names <- c("", colnames(lazy_loaded_data()))
updateSelectInput(session, "grouping_variables", choices = column_names)
updateSelectInput(session, "sample_variable", choices = column_names)
updateSelectInput(session, "x_variable", choices = column_names)
updateSelectInput(session, "y_variable", choices = column_names)
}
})
lazy_chunks <- reactive({
data <- lazy_loaded_data()
if (!is.null(data) & !is.null(input$grouping_variables)) {
chunks <- distinct_at(data, vars(input$grouping_variables))
} else {
chunks <- NULL
}
chunks
})
stored_data <- reactiveValues(data = NULL)
row_num_vect <- reactiveValues(row_num = 1)
cur_chunk <- reactive({
if (!is.null(lazy_chunks())) {
lazy_chunks() %>%
slice(row_num_vect$row_num)
} else {
NULL
}
})
observeEvent(input$next_chunk, {
chunks <- lazy_chunks()
single_chunk_windows <- get_single_chunk_windows(chunks,
row_num_vect$row_num,
brush_data$windows)
stored_data$data <- update_stored_data(stored_data$data, single_chunk_windows)
row_num_vect$row_num <- row_num_vect$row_num + 1
if (row_num_vect$row_num > nrow(chunks)) {
row_num_vect$row_num <- 1
}
if (!is.null(stored_data$data)) {
stored_data$data <- clear_saved_window_data(chunks,
row_num_vect$row_num,
stored_data$data)
}
brush_data$windows <- empty_window_data
})
observeEvent(input$prev_chunk, {
chunks <- lazy_chunks()
single_chunk_windows <- get_single_chunk_windows(chunks,
row_num_vect$row_num,
brush_data$windows)
stored_data$data <- update_stored_data(stored_data$data, single_chunk_windows)
row_num_vect$row_num <- row_num_vect$row_num - 1
if (row_num_vect$row_num < 1) {
row_num_vect$row_num <- nrow(chunks)
}
if (!is.null(stored_data$data)) {
stored_data$data <- clear_saved_window_data(chunks,
row_num_vect$row_num,
stored_data$data)
}
brush_data$windows <- empty_window_data
})
observeEvent(input$skip, {
chunks <- lazy_chunks()
single_chunk_windows <- get_single_chunk_windows(chunks,
row_num_vect$row_num,
brush_data$windows)
stored_data$data <- update_stored_data(stored_data$data, single_chunk_windows)
perc_skip = as.numeric(input$percent_skip)
perc_skip = ifelse(is.na(perc_skip), 5, perc_skip)
row_num_vect$row_num <- row_num_vect$row_num + round(perc_skip / 100 * nrow(chunks))
if (row_num_vect$row_num > nrow(chunks)) {
row_num_vect$row_num <- 1
}
if (!is.null(stored_data$data)) {
stored_data$data <- clear_saved_window_data(chunks,
row_num_vect$row_num,
stored_data$data)
}
brush_data$windows <- empty_window_data
})
output$download_data <- downloadHandler(filename = "shiny_eyes_output.csv",
content = function(file) {
chunks <- lazy_chunks()
single_chunk_windows <- get_single_chunk_windows(chunks,
row_num_vect$row_num,
brush_data$windows)
stored_data$data <- update_stored_data(stored_data$data, single_chunk_windows)
stored_data$data <- stored_data$data %>%
arrange(!!!syms(input$grouping_variables), xmin, xmax)
write_csv(stored_data$data, file)},
contentType = "text/csv")
chunk_data <- reactive({
chunks <- lazy_chunks()
if (!is.null(chunks)) {
cur_chunk() %>%
left_join(lazy_loaded_data())
} else {
NULL
}})
output$chunk_name <- renderText({
get_chunk_title(lazy_chunks(), row_num_vect$row_num)
})
brush_data <- reactiveValues(windows = empty_window_data)
chunk_codes <- reactive({
if (!is.null(cur_chunk()) & !is.null(lazy_loaded_codes()) & input$sample_variable != "" & input$x_variable != "" & input$y_variable != "") {
cur_chunk() %>%
left_join(lazy_loaded_codes()) %>%
select(xmin, xmax, window_name)
} else {
NULL
}
})
observeEvent(chunk_codes(), {
if (is.null(chunk_codes())) {
brush_data$windows <- empty_window_data
} else {
brush_data$windows <- chunk_codes()
}
})
observeEvent(input$undo_brush, {
if (nrow(brush_data$windows) > 0) {
brush_data$windows <- head(brush_data$windows, -1) # Remove last window
}
})
observeEvent(input$clear_brush, {
brush_data$windows <- empty_window_data
stored_data$data <- clear_saved_window_data(lazy_chunks(),
row_num_vect$row_num,
stored_data$data)
})
observeEvent(input$keypress, {
if (input$keypress %in% c("1", "2", "3")) {
window_name <- switch(input$keypress,
"1" = input$window_1_name,
"2" = input$window_2_name,
"3" = input$window_3_name)
brush_data$windows <- rbind(brush_data$windows,
list(xmin = input$image_brush$xmin,
xmax = input$image_brush$xmax,
window_name = window_name),
stringsAsFactors = FALSE)
brush_data$windows$window_name <- factor(brush_data$windows$window_name,
levels = c(input$window_1_name,
input$window_2_name,
input$window_3_name))
} else if (input$keypress == "d") {
delete_x <- input$trace_hover$x
if (!is.null(delete_x) & !is.null(brush_data$windows)) {
brush_data$windows <- brush_data$windows %>%
filter(!(xmin <= delete_x & xmax >= delete_x))
}
}
})
output$trace_plot <- renderPlot({
make_trace_plot(input, chunk_data(), brush_data, colors)
})
gaze_gif_data <- reactiveValues(render_gif = FALSE)
observeEvent(input$render_gif_button, {gaze_gif_data$render_gif <- TRUE})
observeEvent(input$hide_gif_button, {gaze_gif_data$render_gif <- FALSE})
output$gaze_gif <- renderImage({
make_gaze_gif(gaze_gif_data$render_gif, input, chunk_data())
}, deleteFile = TRUE)
}
shinyApp(ui, server)