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# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received A copy of the GNU Library General
# Public License along with this library; if not, write to the
# Free Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
###############################################################################
# FUNCTION: SLIDER MENU:
# .sliderMenu Opens a teching demo slider menu
# .tdSliderMenu Opens a teching demo slider and button menu
###############################################################################
.slider.env = new.env()
# ------------------------------------------------------------------------------
.sliderMenu <- function(refresh.code, names, minima, maxima,
resolutions, starts,
title = "Slider", no = 0, set.no.value = 0)
{
# A function implemented by Diethelm Wuertz
# Description:
# Starts a slider menu
# Source:
# Built on code written by Peter Wolf
# FUNCTION:
# Requirement:
if (!requireNamespace("tcltk", quietly = TRUE))
stop("Package 'tcltk' not available (should *not* happen, please report!)\n")
# Environment:
if (!exists(".slider.env")) {
.slider.env <<- new.env()
}
if (no != 0) {
options(show.error.messages = FALSE)
ans <- as.numeric(tcltk::tclvalue(get(paste("slider", no, sep = ""),
envir = .slider.env)))
options(show.error.messages = TRUE)
return(ans)
}
if (set.no.value[1] != 0) {
try(eval(parse(text =
paste("tclvalue(slider", set.no.value[1],
")<-", set.no.value[2], sep = "")),
envir = .slider.env),
silent = TRUE)
return(set.no.value[2])
}
# Toplevel:
nt = tcltk::tktoplevel()
tcltk::tkwm.title(nt, title)
# Slider:
for (i in seq(names)) {
eval(parse(text = paste("assign(\"slider", i, "\",
tclVar(starts[i]), envir = .slider.env)", sep = "")))
tcltk::tkpack(fr<-tcltk::tkframe(nt), anchor = "sw")
lab = tcltk::tklabel(fr, text = names[i], anchor = "sw")
sc = tcltk::tkscale(fr, command = refresh.code, from = minima[i],
to = maxima[i], showvalue = TRUE, resolution =
resolutions[i], orient = "horiz")
assign("sc", sc, envir = .slider.env)
tcltk::tkgrid(sc, lab)
eval(parse(text = paste("tkconfigure(sc, variable = slider", i, ")",
sep = "")), envir = .slider.env)
}
tcltk::tkpack(fr<-tcltk::tkframe(nt), anchor = "sw")
# Quit:
quitButton = tcltk::tkbutton(fr, text = " Quit ",
command = function() {
tcltk::tkdestroy(nt)
} )
# Reset:
resetButton = tcltk::tkbutton(fr, text = " Start | Reset ",
command = function() {
for (i in seq(starts))
eval(parse(text =
paste("tclvalue(slider", i, ")<-", starts[i], sep="")),
envir = .slider.env)
refresh.code()
} )
# Compose:
tcltk::tkgrid(resetButton, quitButton, sticky = "sew")
}
# ------------------------------------------------------------------------------
.tdSliderMenu <-
function(sl.functions, names, minima, maxima, resolutions, starts,
but.functions, but.names, no, set.no.value, obj.name, obj.value,
reset.function, title)
{
# A function implemented by Diethelm Wuertz
# Description
# Opens a teching demo slider menu
# Notes:
# Build on ideas and code from:
# R Package: TeachingDemos
# Title: Demonstrations for teaching and learning
# Version: 1.5
# Author: Greg Snow
# Description: This package is a set of demonstration functions
# that can be used in a classroom to demonstrate statistical
# concepts, or on your own to better understand the concepts
# or the programming.
# Maintainer: Greg Snow <greg.snow@intermountainmail.org>
# License: Artistic
# FUNCTION:
# Requirement:
if (!requireNamespace("tcltk", quietly = TRUE))
stop("Package 'tcltk' not available (should *not* happen, please report!)\n")
# Setup:
if(!missing(no)) {
return(as.numeric(tcltk::tclvalue(get(paste(".tdSlider", no, sep=""),
envir = .slider.env))))
}
if(!missing(set.no.value)){
try(eval(parse(text=paste("tclvalue(.tdSlider", set.no.value[1],")<-",
set.no.value[2], sep = "")), envir = .slider.env))
return(set.no.value[2])
}
if(!exists(".slider.env")) {
.slider.env <<- new.env()
}
if(!missing(obj.name)){
if(!missing(obj.value)) {
assign(obj.name, obj.value, envir = .slider.env)
} else {
obj.value <- get(obj.name, envir = .slider.env)
}
return(obj.value)
}
if(missing(title)) {
title = "Control Widget"
}
# GUI Settings:
nt <- tcltk::tktoplevel()
tcltk::tkwm.title(nt, title)
tcltk::tkwm.geometry(nt, "+0+0")
# Buttons:
tcltk::tkpack(
f.but <- tcltk::tkframe(nt), fill = "x")
# Quit Button:
quitCMD = function() {
tcltk::tkdestroy(nt)
}
tcltk::tkpack(
tcltk::tkbutton(f.but, text = "Quit", command = quitCMD, anchor = "sw"),
side = "right",
fill = "y")
# Reset Button:
if(missing(reset.function)) {
reset.function <- function(...) print("relax")
}
if(!is.function(reset.function)) {
reset.function<-eval(parse(text =
paste("function(...){",reset.function,"}")))
}
resetCMD = function()
{
for(i in seq(names))
eval(parse(text = paste("tclvalue(.tdSlider",i,")<-",
starts[i], sep = "")),
envir = .slider.env)
reset.function()
}
tcltk::tkpack(
tcltk::tkbutton(f.but, text = "Reset", command = resetCMD, anchor = "sw"),
side = "right",
fill = "y")
if (missing(but.names)) {
but.names <- NULL
}
for (i in seq(but.names)) {
but.fun <-
if (length(but.functions) > 1)
but.functions[[i]]
else
but.functions
if (!is.function(but.fun)) {
but.fun <-
eval(parse(text = paste("function(...){", but.fun, "}")))
}
tcltk::tkpack(
tcltk::tkbutton(f.but, text = but.names[i], command = but.fun,
anchor = "nw"),
# side = "right",
fill = "x"
)
}
# Sliders:
if(missing(names)) {
names <- NULL
}
if(missing(sl.functions)) {
sl.functions <- function(...){}
}
for(i in seq(names)){
eval(parse(text = paste("assign('.tdSlider",i,"',
tclVar(starts[i]), env = .slider.env)", sep = "")))
tcltk::tkpack(fr <- tcltk::tkframe(nt))
lab <- tcltk::tklabel(fr,
text = names[i],
anchor = "sw",
width = "35")
sc <- tcltk::tkscale(fr,
from = minima[i],
to = maxima[i],
showvalue = TRUE,
resolution = resolutions[i],
orient = "horiz")
tcltk::tkpack(lab,
sc,
anchor = "sw",
side = "right");
assign("sc", sc, envir = .slider.env)
eval(parse(text=paste("tkconfigure(sc,variable=.tdSlider",i,")",
sep="")), envir = .slider.env)
sl.fun <-
if(length(sl.functions)>1)
sl.functions[[i]]
else
sl.functions
if(!is.function(sl.fun))
sl.fun<-eval(parse(text=paste("function(...){", sl.fun,"}")))
tcltk::tkconfigure(sc, command = sl.fun)
}
assign("slider.values.old", starts, envir = .slider.env)
# Return Value:
invisible(nt)
}
################################################################################
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