Improve addin

NAMESPACE

@@ -33,6 +33,7 @@ importFrom(DT,datatable)
 importFrom(DT,editData)
 importFrom(DT,renderDataTable)
 importFrom(DT,replaceData)
+importFrom(dplyr,bind_rows)
 importFrom(leaflet,setView)
 importFrom(mapview,mapview)
 importFrom(miniUI,gadgetTitleBar)

R/addin.R

@@ -0,0 +1,107 @@
+
+
+
+#' @title mapedit create features Addin
+#' @description Create and save spatial objects within the Rstudio IDE. Objects
+#' can then be saved to file types such as \code{.geojson} or \code{.shp}.
+#' Objects are also output to the console and can be assigned to a variable
+#' using `.Last.value`. If you wish to pass the output directly to a variable
+#' simply call the addin function, ie. \code{new_sf <- createFeatures()}.
+#'
+#' An existing sf \code{data.frame} can also be passed either indirectly by
+#' selecting text in RStudio with the name of the object, or directly by
+#' passing the existing sf object to \code{new_sf <- createFeatures(existing_sf)}.
+#' When passing an existing sf object you can only add and edit additional features,
+#' the existing features cannot be changed.
+#'
+#' @param SF_OBJECT sf Simple feature collection
+#'
+#' @return sf object and/or saved to file
+#' @importFrom miniUI miniPage miniContentPanel gadgetTitleBar miniButtonBlock
+#' @import shiny
+#' @importFrom shinyWidgets switchInput updateSwitchInput
+#' @importFrom mapview mapview
+#' @importFrom sf write_sf
+#' @importFrom dplyr bind_rows
+#' @importFrom leaflet setView
+#' @importFrom rstudioapi getActiveDocumentContext
+#' @export
+#'
+createFeatures <- function(SF_OBJECT = NULL) {
+
+  ui <- miniPage(
+    gadgetTitleBar("Edit Map"),
+    miniContentPanel(
+      editModUI("editor"),
+      miniButtonBlock(
+        div(style="display: inline-block;padding-top:22px;padding-left:30px;width:200px;",
+            switchInput('savefile', 'Save', value = FALSE, onStatus = "success", offStatus = "danger")),
+        div(style="display: inline-block; width: 400px;",
+            textInput('filename', '', value = 'saved_geometry.geojson')),
+        div(style="display: inline-block;padding-top:18px;width: 400px;font-size: 10pt;color: #313844;",
+            'The filename can include a path relative to working directory. ',
+            'A different file type can be selected by changing the file extension.')
+      )
+    )
+  )
+
+  server <- function(input, output, session) {
+
+    # get values from rstudio
+    ct <- getActiveDocumentContext()
+
+    TEXT <- ct$selection[[1]]$text
+    OBJECTNAME <- ifelse(TEXT == '', 'geom', TEXT)
+    FILENAME <- ifelse(TEXT == '', 'saved_geometry.geojson', paste0(TEXT, '.geojson'))
+
+    # test selected text an sf object (if not passed directly)
+    try({
+      if (is.null(SF_OBJECT)) {
+        SF_OBJECT <- get(TEXT)
+        if (!('sf' %in% class(SF_OBJECT))) {SF_OBJECT <- NULL}
+      }
+    }, silent = TRUE)
+
+    # update UI based on inputs
+    updateTextInput(session, 'filename', value = FILENAME)
+    if (FILENAME != 'saved_geometry.geojson') {
+      updateSwitchInput(session, 'savefile', value = TRUE)
+    }
+
+    # load mapedit
+    if ('sf' %in% class(SF_OBJECT)) {
+      geo <- callModule(editMod, "editor", mapview(SF_OBJECT)@map)
+    } else {
+      geo <- callModule(editMod, "editor", setView(mapview()@map, 80, 0, 3))
+    }
+
+    observe({
+      input$filename
+      OBJECTNAME <- tools::file_path_sans_ext(basename(input$filename))
+    })
+
+    # return geometry to file and object in console
+    observeEvent(input$done, {
+      geom <- geo()$finished
+
+      if (!is.null(geom) & !is.null(SF_OBJECT)) geom <- dplyr::bind_rows(SF_OBJECT, geom)
+
+      if (!is.null(geom)) {
+        if (input$savefile) {
+          sf::write_sf(geom, input$filename, delete_layer = TRUE, delete_dsn = TRUE)
+        }
+      }
+
+      stopApp({
+        if (!is.null(geom)) {
+          geom
+        }
+      })
+    })
+
+  }
+
+  viewer <- paneViewer(600)
+  runGadget(ui, server, viewer = viewer)
+
+}

inst/rstudio/addins.dcf

@@ -0,0 +1,9 @@
+Name: Create Spatial Data
+Description: Create spatial data using mapedit
+Binding: createFeatures
+Interactive: true
+
+Name: Edit Spatial Data and Attributes
+Description: Create and edit spatial data and attributes
+Binding: editAttributes
+Interactive: true