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#' Pie Charts Subclass
#'
#' \code{gpie} class is a subclass for pie charts.
#'
#' This class is a subclass which show dialog boxes of pie charts for graphics editing.
#'
#' @section Fields:
#' \describe{
#' \item{\code{top}: }{\code{tkwin} class object; parent of widget window.}
#' \item{\code{alternateFrame}: }{\code{tkwin} class object; a special frame for some GUI parts.}
#' \item{\code{vbbox1}: }{\code{variableboxes} class object; the frame to select variables.}
#' \item{\code{vbbox2}: }{\code{variableboxes} class object; the frame to select facet variables.}
#' \item{\code{lbbox1}: }{\code{textfields} class object; the frame to set axis labels and the main title.}
#' \item{\code{tbbox1}: }{\code{toolbox} class object; the frame to set the font, the colour set, other option, and the theme.}
#' }
#' @section Contains:
#' NULL
#' @section Methods:
#' \describe{
#' \item{\code{plotWindow()}: }{Create the window that make plots.}
#' \item{\code{savePlot(plot)}: }{Save the plot.}
#' \item{\code{registRmlist(object)}: }{Register deletable temporary objects.}
#' \item{\code{removeRmlist()}: }{Remove registered temporary objects.}
#' \item{\code{setFront()}: }{Set front parts of frames.}
#' \item{\code{setBack()}: }{Set back parts of frames.}
#' \item{\code{getWindowTitle()}: }{Get the title of the window.}
#' \item{\code{getHelp()}: }{Get the title of the help document.}
#' \item{\code{getParms()}: }{Get graphics settings parameters.}
#' \item{\code{checkTheme(index)}: }{Check themes.}
#' \item{\code{checkVariable(var)}: }{Check a variable length.}
#' \item{\code{checkError(parms)}: }{Check errors.}
#' \item{\code{setDataframe(parms)}: }{Set data frames.}
#' \item{\code{getGgplot(parms)}: }{Get \code{ggplot}.}
#' \item{\code{getGeom(parms)}: }{Get \code{geom}.}
#' \item{\code{getScale(parms)}: }{Get \code{scale}.}
#' \item{\code{getCoord(parms)}: }{Get \code{coord}.}
#' \item{\code{getFacet(parms)}: }{Get \code{facet}.}
#' \item{\code{getXlab(parms)}: }{Get \code{xlab}.}
#' \item{\code{getYlab(parms)}: }{Get \code{ylab}.}
#' \item{\code{getZlab(parms)}: }{Get \code{zlab}.}
#' \item{\code{getMain(parms)}: }{Get the main label.}
#' \item{\code{getTheme(parms)}: }{Get \code{theme}.}
#' \item{\code{getOpts(parms)}: }{Get other \code{opts}.}
#' \item{\code{getPlot(parms)}: }{Get the plot object.}
#' \item{\code{getMessage()}: }{Get the plot error message.}
#' \item{\code{commandDoIt(command)}: }{An wrapper function for command execution.}
#' }
#' @family plot
#'
#' @name gpie-class
#' @aliases gpie
#' @rdname plot-gpie
#' @docType class
#' @keywords hplot
#' @importFrom scales percent_format
#' @export gpie
gpie <- setRefClass(
Class = "gpie",
fields = c("vbbox1", "vbbox2", "lbbox1", "tbbox1"),
contains = c("plot_base"),
methods = list(
setFront = function() {
vbbox1 <<- variableboxes$new()
vbbox1$front(
top = top,
types = list(Factors()),
titles = list(
gettextKmg2("Variable (pick one)")
),
initialSelection = list(0)
)
vbbox2 <<- variableboxes$new()
vbbox2$front(
top = top,
types = list(Factors(), Factors()),
titles = list(
gettextKmg2("Facet variable in rows"),
gettextKmg2("Facet variable in cols")
)
)
lbbox1 <<- textfields$new()
lbbox1$front(
top = top,
initValues = list("<auto>", ""),
titles = list(
gettextKmg2("Legend label"),
gettextKmg2("Title")
)
)
tbbox1 <<- toolbox$new()
tbbox1$front(top)
},
setBack = function() {
vbbox1$back()
vbbox2$back()
lbbox1$back()
tbbox1$back()
},
getWindowTitle = function() {
gettextKmg2("Pie chart")
},
getHelp = function() {
"coord_polar"
},
getParms = function() {
x <- character(0)
y <- getSelection(vbbox1$variable[[1]])
z <- character(0)
s <- getSelection(vbbox2$variable[[1]])
t <- getSelection(vbbox2$variable[[2]])
y <- checkVariable(y)
s <- checkVariable(s)
t <- checkVariable(t)
xlab <- ""
xauto <- x
ylab <- tclvalue(lbbox1$fields[[1]]$value)
yauto <- y
zlab <- ""
main <- tclvalue(lbbox1$fields[[2]]$value)
size <- tclvalue(tbbox1$size$value)
family <- getSelection(tbbox1$family)
colour <- getSelection(tbbox1$colour)
save <- tclvalue(tbbox1$goption$value[[1]])
theme <- checkTheme(getSelection(tbbox1$theme))
options(
kmg2FontSize = tclvalue(tbbox1$size$value),
kmg2FontFamily = seq_along(tbbox1$family$varlist)[tbbox1$family$varlist == getSelection(tbbox1$family)] - 1,
kmg2ColourSet = seq_along(tbbox1$colour$varlist)[tbbox1$colour$varlist == getSelection(tbbox1$colour)] - 1,
kmg2SaveGraph = tclvalue(tbbox1$goption$value[[1]]),
kmg2Theme = seq_along(tbbox1$theme$varlist)[tbbox1$theme$varlist == getSelection(tbbox1$theme)] - 1
)
list(
x = x, y = y, z = z, s = s, t = t,
xlab = xlab, ylab = ylab, zlab = zlab, main = main,
size = size, family = family, colour = colour, save = save, theme = theme
)
},
checkError = function(parms) {
if (length(parms$y) == 0) {
errorCondition(
recall = windowPie,
message = gettextKmg2("Variable is not selected")
)
errorCode <- TRUE
} else {
errorCode <- FALSE
}
errorCode
},
setDataframe = function(parms) {
var <- list()
if (length(parms$y) != 0) {
var <- c(var, paste0("y = ", ActiveDataSet(), "$", parms$y))
}
if (length(parms$s) != 0) {
var <- c(var, paste0("s = ", ActiveDataSet(), "$", parms$s))
}
if (length(parms$t) != 0) {
var <- c(var, paste0("t = ", ActiveDataSet(), "$", parms$t))
}
command <- do.call(paste, c(var, list(sep = ", ")))
command <- paste0(".df <- data.frame(", command, ")")
if (length(parms$s) != 0 && length(parms$t) != 0) {
command <- paste0(
command,
"\n",
".df <- as.data.frame(with(.df, prop.table(table(y, s, t), margin = 2:3)))"
)
} else if (length(parms$s) != 0) {
command <- paste0(
command,
"\n",
".df <- as.data.frame(with(.df, prop.table(table(y, s), margin = 2)))"
)
} else if (length(parms$t) != 0) {
command <- paste0(
command,
"\n",
".df <- as.data.frame(with(.df, prop.table(table(y, t), margin = 2)))"
)
} else {
command <- paste0(
command,
"\n",
".df <- as.data.frame(with(.df, prop.table(table(y))))"
)
}
commandDoIt(command)
registRmlist(.df)
},
getGgplot = function(parms) {
"ggplot(data = .df, aes(x = factor(1), y = Freq, fill = y)) + \n "
},
getGeom = function(parms) {
"geom_bar(width = 1, stat = \"identity\") + \n "
},
getScale = function(parms) {
scale <- "scale_y_continuous(labels = scales::percent_format(), limits = c(0, 1)) + \n "
if (parms$colour == "Default") {
} else if (parms$colour == "Hue") {
scale <- paste0(scale, "scale_fill_hue() + \n ")
} else if (parms$colour == "Grey") {
scale <- paste0(scale, "scale_fill_grey() + \n ")
} else {
scale <- paste0(scale, "scale_fill_brewer(palette = \"", parms$colour, "\") + \n ")
}
scale
},
getCoord = function(parms) {
"coord_polar(theta = \"y\") + \n "
},
getYlab = function(parms) {
if (nchar(parms$ylab) == 0) {
ylab <- ""
} else if (parms$ylab == "<auto>") {
ylab <- paste0("labs(fill = \"", parms$y, "\") + \n ")
} else {
ylab <- paste0("labs(fill = \"", parms$ylab, "\") + \n ")
}
ylab
},
getOpts = function(parms) {
opts <- list()
if (length(parms$s) != 0 || length(parms$t) != 0) {
opts <- c(opts, "panel.spacing = unit(0.3, \"lines\")")
}
opts <- c(
opts,
"legend.position = \"right\"",
"axis.title.x = element_blank()",
"axis.title.y = element_blank()",
"axis.text.y = element_blank()",
"axis.ticks = element_blank()"
)
if (nchar(parms$ylab) == 0) {
opts <- c(opts, "legend.title = element_blank()")
}
if (parms$theme == "RcmdrPlugin.KMggplot2::theme_simple") {
opts <- c(opts, "panel.border = element_blank()")
}
if (length(opts) != 0) {
opts <- do.call(paste, c(opts, list(sep = ", ")))
opts <- paste0(" + \n theme(", opts, ")")
} else {
opts <- ""
}
opts
}
)
)
#' Wrapper Function of Pie Charts Subclass
#'
#' \code{windowPie} function is a wrapper function of \code{gpie} class for the R-commander menu bar.
#'
#' @rdname plot-gpie-windowPie
#' @keywords hplot
#' @export
windowPie <- function() {
Pie <- RcmdrPlugin.KMggplot2::gpie$new()
Pie$plotWindow()
}
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