/usr/share/tcltk/tklib0.6/plotchart/plotobject.tcl is in tklib 0.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Routine to plot arbitrary canvas items into plots
#
namespace eval ::Plotchart {
#
# Settings and variable for the DrawObject method
#
# Possible standard canvas item types
#
variable canvasObject
set canvasObject(StandardTypes) {arc line oval polygon rectangle text bitmap image window}
#
# Additional custom item types
#
set canvasObject(CustomTypes) {circle dot cross}
#
# All item types together
#
set canvasObject(AllTypes) [list]
foreach cElement $canvasObject(StandardTypes) {
lappend canvasObject(AllTypes) $cElement
}
foreach cElement $canvasObject(CustomTypes) {
lappend canvasObject(AllTypes) $cElement
}
foreach {itemType ignoredOptions mappedOptions defaultValues} {
arc
{-symbol -type -filled -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-color -outline -colour -outline -fillcolor -fill}
{}
line
{-symbol -type -filled -fillcolour -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-color -fill -colour -fill}
{}
oval
{-symbol -type -filled -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-color -outline -colour -outline -fillcolor -fill}
{}
polygon
{-symbol -type -filled -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-color -outline -colour -outline -fillcolor -fill}
{}
rectangle
{-symbol -type -filled -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-color -outline -colour -outline -fillcolor -fill}
{}
text
{-symbol -type -filled -fillcolour -boxwidth -width -whisker -whiskerwidth -mediancolour -medianwidth}
{-colour -fill -color -fill}
{}
bitmap
{-color -colour -symbol -type -filled -fillcolour -boxwidth -width -whisker -whiskerwidth -mediancolour -medianwidth}
{}
{}
image
{-color -colour -symbol -type -filled -fillcolour -boxwidth -width -whisker -whiskerwidth -mediancolour -medianwidth}
{}
{}
window
{-color -colour -symbol -type -filled -fillcolour -boxwidth -width -whisker -whiskerwidth -mediancolour -medianwidth}
{}
{}
circle
{-symbol -type -filled -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-colour -color -fillcolour -fillcolor -width -diameter}
{-fillcolor {} -color black -diameter 10 -width 1}
dot
{-symbol -type -filled -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-colour -color -fillcolor -color -width -diameter}
{-diameter 1 -color black}
cross
{-symbol -type -filled -boxwidth -whisker -whiskerwidth -mediancolour -medianwidth}
{-colour -color -fillcolor -color}
{-diameter 10 -color black -width 1 -capstyle butt}
} {
#
# These options from the series are ignored in the corresponding canvas item:
#
set canvasObject($itemType,ignored) $ignoredOptions
#
# These are a mapping from series/object option names to canvas item type names:
#
set canvasObject($itemType,mapping) $mappedOptions
#
# This is a list of object options and their default values:
#
set canvasObject($itemType,defaults) $defaultValues
}
}
# DrawObject --
# Draw some canvas item onto the chart using chart coordinates
#
# Arguments:
# w Name of the canvas
# item Type of item
# series Name of the plotting series, used for default drawing options
# args List holding coordinates as the first elements of args (only numerical values)
# and additional configuration option value pairs thereafter
# (no numerical options; according to the canvas item)
#
# Result:
# Id of the newly created canvas item
#
# Note: The special construct of 'args' makes it possible to
# specify the coords as one list or as single arguments
# just like the canvas items do
#
proc ::Plotchart::DrawObject {w item series args} {
variable data_series
variable canvasObject
variable config
#
# check for existent object types
#
if {[lsearch -exact $canvasObject(AllTypes) $item] < 0} {
return -code error "no such canvas object: $item"
}
#
# Split coords from args
#
if {[llength [lindex $args 0]] > 1} {
#
# Coordinates specified as one list:
#
set coords [lindex $args 0]
set arguments [lrange $args 1 end]
} else {
#
# Coordinates specified as single args -> find first non-numerical arg:
# (the following is not strictly correct, but will do the job in this case)
#
set startIndex [lsearch -regexp -not $args {^[-+]?\.?[0-9]+}]
switch $startIndex {
0 {return -code error "no coordinates given for $item object"}
-1 {
set arguments {}
set coords $args
}
default {
set arguments [lrange $args $startIndex end]
incr startIndex -1
set coords [lrange $args 0 $startIndex]
}
}
}
#
# Transform coodinates into pixels:
#
if {[info exists config($w,object,transposecoordinates)] && $config($w,object,transposecoordinates)} {
#
# Transposed coordinates
#
foreach {y x} $coords {
foreach {pxcrd pycrd} [::Plotchart::coordsToPixel $w $x $y] {break}
lappend pcoords $pxcrd $pycrd
}
} else {
foreach {x y} $coords {
foreach {pxcrd pycrd} [::Plotchart::coordsToPixel $w $x $y] {break}
lappend pcoords $pxcrd $pycrd
}
}
#
# Initialize with default options (only applicable to custom canvas objects)
#
if {[lsearch -exact $canvasObject(CustomTypes) $item] >= 0} {
array set options $canvasObject($item,defaults)
}
#
# Inherit options from the specified series
#
foreach key [array names data_series $w,$series,*] {
set opt [lindex [split $key ,] end]
#
# Ignore non-options in data_series:
#
if {[string index $opt 0] ne "-"} {
continue
}
#
# Ignore non-existant canvas item option:
#
if {[lsearch -exact $canvasObject($item,ignored) $opt] >= 0} {
continue
}
#
# Map option to the corresponding canvas item type option:
#
set opt [string map $canvasObject($item,mapping) $opt]
#
# Finally save the option:
#
set options($opt) $data_series($key)
}
#
# Load user specied options (merging with existing options)
# and again map to the corresponding canvas item type options
#
foreach {userOpt userVal} $arguments {
set userOpt [string map $canvasObject($item,mapping) $userOpt]
set options($userOpt) $userVal
}
#
# Create the item
#
if {[lsearch -exact $canvasObject(StandardTypes) $item] >= 0} {
set id [$w create $item $pcoords]
#
# configure the item accordingly:
#
foreach {option value} [array get options] {
$w itemconfigure $id $option $value
}
} else {
set diff [expr {$options(-diameter)/2.0}]
foreach {pxcrd pycrd} $pcoords {break}
set pxcrd1 [expr {$pxcrd - $diff}]
set pycrd1 [expr {$pycrd + $diff}]
set pxcrd2 [expr {$pxcrd + $diff}]
set pycrd2 [expr {$pycrd - $diff}]
switch $item {
circle {
set id [$w create oval $pxcrd1 $pycrd1 $pxcrd2 $pycrd2 \
-fill $options(-fillcolor) -outline $options(-color) -width $options(-width)]
}
dot {
set id [$w create oval $pxcrd1 $pycrd1 $pxcrd2 $pycrd2 -fill $options(-color) -outline {}]
}
cross {
set id [$w create line $pxcrd1 $pycrd $pxcrd2 $pycrd \
-fill $options(-color) -width $options(-width) -capstyle $options(-capstyle)]
set tag canvCross_$id
$w itemconfigure $id -tags $tag
$w create line $pxcrd $pycrd1 $pxcrd $pycrd2 \
-fill $options(-color) -width $options(-width) -tags $tag -capstyle $options(-capstyle)
set id $tag
}
}
}
# add the tag 'object'
$w addtag object withtag $id
# return the canvas item id or tag, so the user can further manupulate it:
return $id
}
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