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#' Histogram Subclass
#'
#' \code{ghist} class is a subclass for histograms.
#'
#' This class is a subclass which show dialog boxes of histograms 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{vbbox3}: }{\code{variableboxes} class object; the frame to set the no. of bins.}
#' \item{\code{lbbox1}: }{\code{textfields} class object; the frame to set axis labels and the main title.}
#' \item{\code{rbbox1}: }{\code{radioboxes} class object; the frame to set the axis scaling.}
#' \item{\code{cbbox1}: }{\code{checkboxes} class object; the frame to set options.}
#' \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 ghist-class
#' @aliases ghist
#' @rdname plot-ghist
#' @docType class
#' @keywords hplot
#' @importFrom scales percent_format
#' @importFrom RColorBrewer brewer.pal
#' @export ghist
ghist <- setRefClass(
Class = "ghist",
fields = c("vbbox1", "vbbox2", "vbbox3", "lbbox1", "rbbox1", "cbbox1", "tbbox1"),
contains = c("plot_base"),
methods = list(
setFront = function() {
vbbox1 <<- variableboxes$new()
vbbox1$front(
top = top,
types = list(nonFactors()),
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>", "<auto>", ""),
titles = list(
gettextKmg2("Horizontal axis label"),
gettextKmg2("Vertical axis label"),
gettextKmg2("Title")
)
)
vbbox3 <<- variableboxes$new()
vbbox3$front(
top = alternateFrame,
types = list(c("Scott", "Freedman-Diaconis", "Sturges")),
titles = list(
gettextKmg2("No. of bins")
),
initialSelection = list(0)
)
rbbox1 <<- radioboxes$new()
rbbox1$front(
top = alternateFrame,
labels = list(
gettextKmg2("Densities"),
gettextKmg2("Frequency counts"),
gettextKmg2("Percentages")
),
title = gettextKmg2("Axis scaling")
)
cbbox1 <<- checkboxes$new()
cbbox1$front(
top = alternateFrame,
initValues = list("0", "0"),
labels = list(
gettextKmg2("Density estimation"),
gettextKmg2("Heat map")
),
title = gettextKmg2("Options")
)
tbbox1 <<- toolbox$new()
tbbox1$front(top)
},
setBack = function() {
vbbox1$back()
vbbox2$back()
lbbox1$back()
boxlist <- c(
list(vbbox3$frame),
list(labelRcmdr(alternateFrame, text=" ")),
list(cbbox1$frame),
list(labelRcmdr(alternateFrame, text=" ")),
list(rbbox1$frame)
)
do.call(tkgrid, c(vbbox3$back_list, list(sticky="nw")))
do.call(tkgrid, c(boxlist, list(sticky="nw")))
tkgrid(alternateFrame, stick="nw")
tkgrid(labelRcmdr(alternateFrame, text=" "), stick="nw")
tbbox1$back()
},
getWindowTitle = function() {
gettextKmg2("Histogram")
},
getHelp = function() {
"geom_histogram"
},
getParms = function() {
x <- getSelection(vbbox1$variable[[1]])
# y <- ""
z <- character(0)
s <- getSelection(vbbox2$variable[[1]])
t <- getSelection(vbbox2$variable[[2]])
x <- checkVariable(x)
s <- checkVariable(s)
t <- checkVariable(t)
xlab <- tclvalue(lbbox1$fields[[1]]$value)
xauto <- x
ylab <- tclvalue(lbbox1$fields[[2]]$value)
# yauto <- y
zlab <- ""
main <- tclvalue(lbbox1$fields[[3]]$value)
size <- tclvalue(tbbox1$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$theme)] - 1
)
densityPlot <- tclvalue(cbbox1$value[[1]])
heatPlot <- tclvalue(cbbox1$value[[2]])
nbins <- getSelection(vbbox3$variable[[1]])
axisScaling <- tclvalue(rbbox1$value)
if (densityPlot == "1" || axisScaling == "1") {
yauto <- gettextKmg2("Density")
y <- "..density.."
axisScaling <- "1"
} else if (axisScaling == "2") {
yauto <- gettextKmg2("Count")
y <- "..count.."
} else if (axisScaling == "3") {
yauto <- gettextKmg2("Percent")
y <- "..count../sum(..count..)"
}
list(
x = x, y = y, z = z, s = s, t = t,
xlab = xlab, xauto = xauto, ylab = ylab, yauto = yauto, zlab = zlab, main = main,
size = size, family = family, colour = colour, save = save, theme = theme,
axisScaling = axisScaling, densityPlot = densityPlot, heatPlot = heatPlot, nbins = nbins
)
},
checkError = function(parms) {
if (length(parms$x) == 0) {
errorCondition(
recall = windowHist,
message = gettextKmg2("Variable is not selected")
)
errorCode <- TRUE
} else {
errorCode <- FALSE
}
errorCode
},
setDataframe = function(parms) {
var <- list()
if (length(parms$x) != 0) {
var <- c(var, paste0("x = ", ActiveDataSet(), "$", parms$x))
}
if (length(parms$s) != 0) {
var <- c(var, paste0("s = ", ActiveDataSet(), "$", parms$s))
}
if (length(parms$t) != 0) {
var <- c(var, paste0("t = ", ActiveDataSet(), "$", parms$t))
}
command <- do.call(paste, c(var, list(sep = ", ")))
command <- paste0(".df <- na.omit(data.frame(", command, "))")
commandDoIt(command)
registRmlist(.df)
},
getGgplot = function(parms) {
paste0(
"ggplot(data = .df, aes(x = x, y = ", parms$y, ")) + \n "
)
},
getGeom = function(parms) {
if (length(parms$nbins) == 0) {
command <- ".nbins <- pretty(range(.df$x), n = nclass.scott(.df$x), min.n = 1)"
} else if (parms$nbins == "Sturges") {
command <- ".nbins <- pretty(range(.df$x), n = nclass.Sturges(.df$x), min.n = 1)"
} else if (parms$nbins == "Freedman-Diaconis") {
command <- ".nbins <- pretty(range(.df$x), n = nclass.FD(.df$x), min.n = 1)"
} else {
command <- ".nbins <- pretty(range(.df$x), n = nclass.scott(.df$x), min.n = 1)"
}
commandDoIt(command)
registRmlist(.nbins)
if (parms$heatPlot == "1") {
geom <- paste0(
"geom_histogram(aes(fill = ", parms$y, "), breaks = .nbins) + \n "
)
} else {
geom <- "geom_histogram(breaks = .nbins) + \n "
}
if (parms$densityPlot == "1") {
geom <- paste0(
geom,
"stat_density(geom = \"path\", size = 1, alpha = 0.5) + \n "
)
}
geom
},
getScale = function(parms) {
if (parms$axisScaling == "3") {
scale <- "scale_y_continuous(expand = c(0.01, 0), labels = scales::percent_format()) + \n "
} else {
scale <- "scale_y_continuous(expand = c(0.01, 0)) + \n "
}
if (parms$heatPlot == "1") {
if (parms$axisScaling == "3") {
if (parms$colour == "Default") {
scale <- paste0(
scale,
"scale_fill_continuous(labels = scales::percent_format()) + \n "
)
} else if (parms$colour == "Hue") {
scale <- paste0(
scale,
"scale_fill_gradient(low = scale_color_hue()$palette(2)[2], ",
"high = scale_color_hue()$palette(2)[1], labels = scales::percent_format()) + \n "
)
} else if (parms$colour == "Grey") {
scale <- paste0(
scale,
"scale_fill_gradient(low = scale_color_grey()$palette(2)[2], ",
"high = scale_color_grey()$palette(2)[1], labels = scales::percent_format()) + \n "
)
} else {
scale <- paste0(
scale, "scale_fill_gradient(",
"low = RColorBrewer::brewer.pal(3, \"", parms$colour, "\")[2], ",
"high = RColorBrewer::brewer.pal(3, \"", parms$colour, "\")[1], ",
"labels = scales::percent_format()) + \n "
)
}
} else {
if (parms$colour == "Default") {
} else if (parms$colour == "Hue") {
scale <- paste0(
scale,
"scale_fill_gradient(low = scale_color_hue()$palette(2)[2], ",
"high = scale_color_hue()$palette(2)[1]) + \n "
)
} else if (parms$colour == "Grey") {
scale <- paste0(
scale,
"scale_fill_gradient(low = scale_color_grey()$palette(2)[2], ",
"high = scale_color_grey()$palette(2)[1]) + \n "
)
} else {
scale <- paste0(
scale, "scale_fill_gradient(",
"low = RColorBrewer::brewer.pal(3, \"", parms$colour, "\")[2], ",
"high = RColorBrewer::brewer.pal(3, \"", parms$colour, "\")[1]) + \n "
)
}
}
}
scale
},
getOpts = function(parms) {
opts <- list()
if (length(parms$s) != 0 || length(parms$t) != 0) {
opts <- c(opts, "panel.spacing = unit(0.3, \"lines\")")
}
if (parms$heatPlot == "1") {
opts <- c(opts, "legend.position = \"none\"")
}
if (length(opts) != 0) {
opts <- do.call(paste, c(opts, list(sep = ", ")))
opts <- paste0(" + \n theme(", opts, ")")
} else {
opts <- ""
}
opts
}
)
)
#' Wrapper Function of Histogram Subclass
#'
#' \code{windowHist} function is a wrapper function of \code{ghist} class for the R-commander menu bar.
#'
#' @rdname plot-ghist-windowHist
#' @keywords hplot
#' @export
windowHist <- function() {
Hist <- RcmdrPlugin.KMggplot2::ghist$new()
Hist$plotWindow()
}
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