/usr/share/tcltk/tklib0.6/plotchart/plotpriv.tcl is in tklib 0.6-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Facilities to draw simple plots in a dedicated canvas
#
# Note:
# This source file contains the private functions.
# It is the companion of "plotchart.tcl"
#
# WidthCanvas --
# Return the width of the canvas
# Arguments:
# w Name of the canvas
# useref Use reference width if it exists
# Result:
# Width in pixels
#
proc ::Plotchart::WidthCanvas {w {useref 1}} {
variable scaling
set ref $scaling($w,reference)
if { [string match {[0-9]*} $w] } {
set w [string range $w 2 end]
}
if { [info exists scaling($ref,refwidth)] && $useref } {
set width $scaling($ref,refwidth)
} else {
set width [winfo width $w]
if { $width < 10 } {
set width [$w cget -width]
}
}
incr width -[$w cget -borderwidth]
return $width
}
# HeightCanvas --
# Return the height of the canvas
# Arguments:
# w Name of the canvas
# useref Use reference height if it exists
# Result:
# Height in pixels
#
proc ::Plotchart::HeightCanvas {w {useref 1}} {
variable scaling
set ref $scaling($w,reference)
if { [string match {[0-9]*} $w] } {
set w [string range $w 2 end]
}
if { [info exists scaling($ref,refheight)] && $useref } {
set height $scaling($ref,refheight)
} else {
set height [winfo height $w]
if { $height < 10 } {
set height [$w cget -height]
}
}
incr height -[$w cget -borderwidth]
return $height
}
# SavePlot --
# Save the plot/chart to a PostScript file (using default options)
# Arguments:
# w Name of the canvas
# filename Name of the file to write
# args Additional optional arguments as ?option value ... ...?
# -format name a file format different from PostScript to save the plot into
# -plotregion region define what region of the plot to save
# ('bbox' saves all within the bbox, 'window' saves what is visible in the current window)
# Result:
# None
# Side effect:
# A (new) PostScript file or other file format
#
proc ::Plotchart::SavePlot { w filename args } {
array set options {-format ps -plotregion window}
array set options $args
foreach {opt val} $args {
if {$opt ni {-format -plotregion}} {
return -code error "Unknown option: $opt - must be: -format or -plotregion"
}
}
if {$options(-plotregion) eq "bbox" && $options(-format) ne "ps"} {
return -code error "'-plotregion bbox' can only be used together with '-format ps'"
}
if {$options(-format) ne "ps"} {
regexp {\..*} $w c
package require Img
#
# This is a kludge:
# Somehow tkwait does not always work (on Windows XP, that is)
#
raise [winfo toplevel $c]
# tkwait visibility [winfo toplevel $c]
after 2000 {set ::Plotchart::waited 0}
vwait ::Plotchart::waited
set img [image create photo -data $c -format window]
$img write $filename -format $options(-format)
} else {
#
# Wait for the canvas to become visible - just in case.
# Then write the file
#
update idletasks
if {$options(-plotregion) eq "window"} {
$w postscript -file $filename
} elseif {$options(-plotregion) eq "bbox"} {
lassign [$w bbox all] xmin ymin xmax ymax
# '+2' here, because the bbox from the canvas is only approximate
# and may be a tiny bit too small sometimes, especially with text
# at the edges
set width [expr {$xmax-$xmin+2}]
set height [expr {$ymax-$ymin+2}]
$w postscript -file $filename -x $xmin -y $ymin -height $height -width $width
} else {
return -code error "Unknown value '$options(-plotregion)' for -plotregion option"
}
}
}
# DetermineFromAxesBox --
# Determine the layout from the information in an axes box
# Arguments:
# axesbox Data defining the axes box
# pxdef Default minimum x-coordinate
# pydef Default minimum y-coordinate
# margin_right Margin right
# margin_bottom Margin bottom
# Result:
# List of four values
#
proc ::Plotchart::DetermineFromAxesBox {axesbox pxdef pydef margin_right margin_bottom} {
variable scaling
foreach {ref_plot dir upperx uppery axis_width axis_height} $axesbox {break}
set pos [string first _ $ref_plot]
set ref_plot [string range $ref_plot [expr {$pos+1}] end]
set refxmin $scaling($ref_plot,pxmin)
set refymin $scaling($ref_plot,pymin)
set refxmax $scaling($ref_plot,pxmax)
set refymax $scaling($ref_plot,pymax)
switch -- [string toupper $dir] {
"N" {
set pxmin [expr {($refxmin + $refxmax)/2}]
set pymin $refymin
}
"NW" {
set pxmin $refxmin
set pymin $refymin
}
"NE" {
set pxmin $refxmax
set pymin $refymin
}
"E" {
set pxmin $refxmax
set pymin [expr {($refymin + $refymax)/2}]
}
"SE" {
set pxmin $refxmax
set pymin $refymax
}
"S" {
set pxmin [expr {($refxmin + $refxmax)/2}]
set pymin $refymax
}
"SW" {
set pxmin $refxmin
set pymin $refymax
}
"W" {
set pxmin $refxmin
set pymin [expr {($refymin + $refymax)/2}]
}
"C" {
set pxmin [expr {($refxmin + $refxmax)/2}]
set pymin [expr {($refymin + $refymax)/2}]
}
default {
set pxmin $refxmin
set pymin $refymin
}
}
set pxmin [expr {$pxmin - $pxdef + $upperx}]
set pymin [expr {$pymin - $pydef - $uppery}] ;# Because of inversion of y-axis
set width [expr {$axis_width + $pxdef + $margin_right}]
set height [expr {$axis_height + $pydef + $margin_bottom}]
return [list $pxmin $pymin $width $height]
}
# MarginsRectangle --
# Determine the margins for a rectangular plot/chart
# Arguments:
# w Name of the plot
# argv List of options
# notext Number of lines of text to make room for at the top
# (default: 2.0)
# text_width Number of characters to be displayed at most on left
# (default: 8)
# Result:
# List of four values
#
proc ::Plotchart::MarginsRectangle { w argv {notext 2.0} {text_width 8}} {
variable config
variable scaling
if { [string match {[0-9]*} $w] } {
set c [string range $w 2 end]
} else {
set c $w
}
set char_width $config(font,char_width)
set char_height $config(font,char_height)
set config($w,font,char_width) $char_width
set config($w,font,char_height) $char_height
foreach {char_width char_height} [FontMetrics $w] {break}
set margin_right [expr {$char_width * 4}]
if { $margin_right < $config($w,margin,right) } {
set margin_right $config($w,margin,right)
}
if { $config($w,rightaxis,usevsubtext) } {
set char_height [font metrics $config($w,rightaxis,vsubtextfont) -linespace]
set margin_right [expr {$margin_right + $char_height + 4}]
}
set margin_bottom [expr {$char_height * 2 + 2}]
if { $margin_bottom < $config($w,margin,bottom) } {
set margin_bottom $config($w,margin,bottom)
}
if { $config($w,bottomaxis,usesubtext) } {
set char_height [font metrics $config($w,bottomaxis,subtextfont) -linespace]
set margin_bottom [expr {$margin_bottom + $char_height}]
}
set pxmin [expr {$char_width*$text_width}]
if { $pxmin < $config($w,margin,left) } {
set pxmin $config($w,margin,left)
}
set pymin [expr {int($char_height*$notext) + [$w cget -borderwidth]}]
if { $pymin < $config($w,margin,top) } {
set pymin $config($w,margin,top)
}
if { $config($w,leftaxis,usesubtext) || $config($w,rightaxis,usesubtext) } {
set char_height1 [font metrics $config($w,leftaxis,subtextfont) -linespace]
set char_height2 [font metrics $config($w,rightaxis,subtextfont) -linespace]
set pymin [expr {$pymin + max($char_height1,$char_height2)}]
}
if { $config($w,leftaxis,usevsubtext) } {
set char_height [font metrics $config($w,leftaxis,vsubtextfont) -linespace]
set pxmin [expr {$pxmin + $char_height + 4}]
}
array set options $argv
if {[info exists options(-box)]} {
foreach {offx offy width height} $options(-box) {break}
if { $offy == 0 } {
set offy [$w cget -borderwidth]
}
set scaling($w,reference) $w
set scaling($w,refx) $offx
set scaling($w,refy) $offy
set scaling($w,refwidth) [expr {$offx + $width}]
set scaling($w,refheight) [expr {$offy + $height}]
} elseif {[info exists options(-axesbox)]} {
foreach {offx offy width height} [DetermineFromAxesBox $options(-axesbox) $pxmin $pymin $margin_right $margin_bottom] {break}
if { $offy == 0 } {
set offy [$w cget -borderwidth]
}
set ref_plot [lindex $options(-axesbox) 0]
set pos [string first _ $ref_plot]
set ref [string range $ref_plot [expr {$pos+1}] end]
set scaling($w,reference) $scaling($ref,reference) ;# A chain of references is possible!
} else {
set scaling($w,reference) $w
set offx 0
set offy [$w cget -borderwidth]
set width [WidthCanvas $w]
set height [HeightCanvas $w]
set scaling($w,refx) 0
set scaling($w,refy) 0
set scaling($w,refwidth) $width
set scaling($w,refheight) $height
}
set pxmin [expr {$offx + $pxmin}]
set pymin [expr {$offy + $pymin}]
set pxmax [expr {$offx + $width - $margin_right}]
set pymax [expr {$offy + $height - $margin_bottom}]
set ref $scaling($w,reference)
if { ! [info exists scaling($ref,boxxmin)] } {
set scaling($ref,boxxmin) $pxmin
set scaling($ref,boxymin) $pymin
set scaling($ref,boxxmax) $pxmax
set scaling($ref,boxymax) $pymax
set scaling($ref,refx) $offx
set scaling($ref,refy) $offy
} else {
Minset scaling($ref,boxxmin) $pxmin
Minset scaling($ref,boxymin) $pymin
Maxset scaling($ref,boxxmax) $pxmax
Maxset scaling($ref,boxymax) $pymax
Minset scaling($ref,refx) $offx
Minset scaling($ref,refy) $offy
}
return [list $pxmin $pymin $pxmax $pymax]
}
# Minset, Maxset --
# Auxiliary procedures to conditionally update a variable
# Arguments:
# varName Name of the variable
# newValue New value
#
proc ::Plotchart::Minset {varName newValue} {
upvar 1 $varName var
if { $var > $newValue } {
set var $newValue
}
}
proc ::Plotchart::Maxset {varName newValue} {
upvar 1 $varName var
if { $var < $newValue } {
set var $newValue
}
}
# MarginsSquare --
# Determine the margins for a square plot/chart
# Arguments:
# w Name of the canvas
# notext Number of lines of text to make room for at the top
# (default: 2.0)
# text_width Number of characters to be displayed at most on left
# (default: 8)
# Result:
# List of four values
#
proc ::Plotchart::MarginsSquare { w {notext 2.0} {text_width 8}} {
variable config
variable scaling
set scaling($w,reference) $w
set scaling($w,refx) 0
set scaling($w,refy) [$w cget -borderwidth]
set scaling($w,refwidth) [WidthCanvas $w]
set scaling($w,refheight) [HeightCanvas $w]
set char_width $config(font,char_width)
set char_height $config(font,char_height)
set config($w,font,char_width) $char_width
set config($w,font,char_height) $char_height
foreach {char_width char_height} [FontMetrics $w] {break}
set margin_right [expr {$char_width * 4}]
if { $margin_right < $config($w,margin,right) } {
set margin_right $config($w,margin,right)
}
set margin_bottom [expr {$char_height * 2 + 2}]
if { $margin_bottom < $config($w,margin,bottom) } {
set margin_bottom $config($w,margin,bottom)
}
set pxmin [expr {$char_width*$text_width}]
if { $pxmin < $config($w,margin,left) } {
set pxmin $config($w,margin,left)
}
set pymin [expr {int($char_height*$notext)}]
if { $pymin < $config($w,margin,top) } {
set pymin $config($w,margin,top)
}
set pxmax [expr {[WidthCanvas $w] - $margin_right}]
set pymax [expr {[HeightCanvas $w] - $margin_bottom}]
if { $pxmax-$pxmin > $pymax-$pymin } {
set pxmax [expr {$pxmin + ($pymax - $pymin)}]
} else {
set pymax [expr {$pymin + ($pxmax - $pxmin)}]
}
return [list $pxmin $pymin $pxmax $pymax]
}
# MarginsCircle --
# Determine the margins for a circular plot/chart
# Arguments:
# w Name of the canvas
# args additional arguments for placement of plot,
# currently: '-box', '-reference', and '-units'
# Result:
# List of four values giving the pixel coordinates
# of the boundary of the piechart
#
proc ::Plotchart::MarginsCircle { w args } {
variable scaling
array set options $args
if { [info exists options(-box)] } {
set scaling($w,reference) $w
} elseif { [info exists options(-reference)] } {
set ref_plot [lindex $options(-reference) 0]
set pos [string first _ $ref_plot]
set ref [string range $ref_plot [expr {$pos+1}] end]
set scaling($w,reference) $scaling($ref,reference)
} else {
set scaling($w,reference) $w
}
set pxmin 80
set pymin 30
set pxmax [expr {[WidthCanvas $w] - 80}]
set pymax [expr {[HeightCanvas $w] - 30}]
#set pxmax [expr {[$w cget -width] - 80}]
#set pymax [expr {[$w cget -height] - 30}]
# width (dx) and height (dy) of plot region in pixels:
if {[info exists options(-units)]} {
# refUnitX, refUnitY - size of one world coordinate unit in the piechart,
# given as canvas coords (can also be m,c,i,p units)
# Note: the pie is always 2 world coordinate units in diameter
#
lassign $options(-units) refUnitX refUnitY
set wc [string range $w 2 end]
set refUnitX [winfo pixels $wc $refUnitX]
set refUnitY [winfo pixels $wc $refUnitY]
set dx [expr {$refUnitX * 2}]
set dy [expr {$refUnitY * 2}]
} else {
set dx [expr {$pxmax-$pxmin+1}]
set dy [expr {$pymax-$pymin+1}]
# make sure, we get a centred circle:
if {$dx < $dy} {
set dy $dx
} else {
set dx $dy
}
set pxmin [expr {($pxmin+$pxmax-$dx)/2}]
}
# new default coords of plotting region:
set pxmax [expr {$pxmin + $dx}]
set pymax [expr {$pymin + $dy}]
if {[info exists options(-reference)]} {
# refPlot - name of the plot referring to
# refX - x world coordinate of center of new piechart in refPlot coordinate system
# refY - see above, just for y
#
lassign $options(-reference) refPlot refX refY
set pos [string first _ $refPlot]
set refPlot [string range $refPlot [expr {$pos+1}] end]
lassign [coordsToPixel $refPlot $refX $refY] refpx refpy
if {$dx < $dy} {set delta [expr {$dx/2.0}]} else {set delta [expr {$dy/2.0}]}
set pxmin [expr {$refpx - $delta}]
set pxmax [expr {$refpx + $delta}]
set pymin [expr {$refpy - $delta}]
set pymax [expr {$refpy + $delta}]
} elseif {[info exists options(-box)]} {
# put the pie into the middle of the -box and make it
# as large as possible, ignoring the labels for now,
# that may be placed outside the box
# Note: also ignores -units setting
lassign $options(-box) pxmin pymin width height
if {$height >= $width} {
# place vertically in the middle of the -box
if { $pxmin == 0 } {set pxmin [$w cget -borderwidth]}
set pymin [expr {$pymin + ($height-$width)/2.0}]
if { $pymin == 0 } {set pymin [$w cget -borderwidth]}
} else {
# place horizontally in the middle of the -box
if { $pymin == 0 } {set pymin [$w cget -borderwidth]}
set pxmin [expr {$pxmin + ($width-$height)/2.0}]
if { $pxmin == 0 } {set pxmin [$w cget -borderwidth]}
}
# only take the smallest dimension to keep the pie a circle:
if {$width < $height} {set height $width}
if {$height < $width} {set width $height}
set pxmax [expr {$pxmin + $width}]
set pymax [expr {$pymin + $height}]
set scaling($w,refx) $pxmin
set scaling($w,refy) $pymin
set scaling($w,refwidth) [expr {$pxmin + $width}]
set scaling($w,refheight) [expr {$pymin + $height}]
} else {
set scaling($w,refx) 0
set scaling($w,refy) [$w cget -borderwidth]
set scaling($w,refwidth) [WidthCanvas $w]
set scaling($w,refheight) [HeightCanvas $w]
}
return [list $pxmin $pymin $pxmax $pymax]
}
# Margins3DPlot --
# Determine the margins for a 3D plot
# Arguments:
# w Name of the canvas
# Result:
# List of four values
#
proc ::Plotchart::Margins3DPlot { w } {
variable scaling
set scaling($w,reference) $w
set scaling($w,refx) 0
set scaling($w,refy) [$w cget -borderwidth]
set scaling($w,refwidth) [WidthCanvas $w]
set scaling($w,refheight) [HeightCanvas $w]
set yfract 0.33
set zfract 0.50
if { [info exists scaling($w,yfract)] } {
set yfract $scaling($w,yfract)
} else {
set scaling($w,yfract) $yfract
}
if { [info exists scaling($w,zfract)] } {
set zfract $scaling($w,zfract)
} else {
set scaling($w,zfract) $zfract
}
set yzwidth [expr {(-120+[WidthCanvas $w])/(1.0+$yfract)}]
set yzheight [expr {(-60+[HeightCanvas $w])/(1.0+$zfract)}]
#set yzwidth [expr {(-120+[$w cget -width])/(1.0+$yfract)}]
#set yzheight [expr {(-60+[$w cget -height])/(1.0+$zfract)}]
set pxmin [expr {60+$yfract*$yzwidth}]
set pxmax [expr {[WidthCanvas $w] - 60}]
#set pxmax [expr {[$w cget -width] - 60}]
set pymin 30
set pymax [expr {30+$yzheight}]
return [list $pxmin $pymin $pxmax $pymax]
}
# GetPlotArea --
# Return the area reserved for the plot
# Arguments:
# w Name of the canvas
# Result:
# List of: (x,y) upper left, (x,y) lower right, width and height
#
proc ::Plotchart::GetPlotArea { w } {
variable scaling
set width [expr {$scaling($w,pxmax) - $scaling($w,pxmin) + 1}]
set height [expr {$scaling($w,pymax) - $scaling($w,pymin) + 1}]
return [list $scaling($w,pxmin) $scaling($w,pymin) $scaling($w,pxmax) $scaling($w,pymax) $width $height]
}
# CopyScalingData --
# Copy the scaling data for coordsToPixel and friends if needed
# Arguments:
# w Name of the plot
# c Name of the canvas
# Result:
# None
#
proc ::Plotchart::CopyScalingData { w c } {
variable scaling
if { [string match "00*" $w] } {
foreach var {new xmin xmax ymin ymax pxmin pxmax pymin pymax coordSystem xfactor yfactor} {
set scaling($c,$var) $scaling($w,$var)
}
}
}
# SetColours --
# Set the colours for those plots that treat them as a global resource
# Arguments:
# w Name of the canvas
# args List of colours to be used
# Result:
# None
#
proc ::Plotchart::SetColours { w args } {
variable scaling
set scaling($w,colours) $args
}
# CycleColours --
# create cycling colours for those plots that treat them as a global resource
# Arguments:
# colours List of colours to be used. An empty list will activate to default colours
# nr_data Number of data records
# Result:
# List of 'nr_data' colours to be used
#
proc ::Plotchart::CycleColours { colours nr_data } {
if {![llength ${colours}]} {
# force to most usable default colour list
set colours {green blue red cyan yellow magenta}
}
if {[llength ${colours}] < ${nr_data}} {
# cycle through colours
set init_colours ${colours}
set colours {}
set pos 0
for {set nr 0} {${nr} < ${nr_data}} {incr nr} {
lappend colours [lindex ${init_colours} ${pos}]
incr pos
if {[llength ${init_colours}] <= ${pos}} {
set pos 0
}
}
if {[string equal [lindex ${colours} 0] [lindex ${colours} end]]} {
# keep first and last colour different from selected colours
# this will /sometimes fail in cases with only one/two colours in list
set colours [lreplace ${colours} end end [lindex ${colours} 1]]
}
}
return ${colours}
}
# DataConfig --
# Configure the data series
# Arguments:
# w Name of the canvas
# series Name of the series in question
# args Option and value pairs
# Result:
# None
#
proc ::Plotchart::DataConfig { w series args } {
variable data_series
variable options
variable option_keys
variable option_values
foreach {option value} $args {
set idx [lsearch $options $option]
if { $idx < 0 } {
return -code error "Unknown or invalid option: $option (value: $value)"
} else {
set key [lindex $option_keys $idx]
set idx [lsearch $option_values $key]
set values [lindex $option_values [incr idx]]
if { $values != "..." } {
if { [lsearch $values $value] < 0 } {
return -code error "Unknown or invalid value: $value for option $option - $values"
}
}
set data_series($w,$series,$key) $value
}
}
}
# ScaleIsometric --
# Determine the scaling for an isometric plot
# Arguments:
# w Name of the canvas
# xmin Minimum x coordinate
# ymin Minimum y coordinate
# xmax Maximum x coordinate
# ymax Maximum y coordinate
# (default: 1.5)
# Result:
# None
# Side effect:
# Array with scaling parameters set
#
proc ::Plotchart::ScaleIsometric { w xmin ymin xmax ymax } {
variable scaling
set pxmin $scaling($w,pxmin)
set pymin $scaling($w,pymin)
set pxmax $scaling($w,pxmax)
set pymax $scaling($w,pymax)
set dx [expr {double($xmax-$xmin)/($pxmax-$pxmin)}]
set dy [expr {double($ymax-$ymin)/($pymax-$pymin)}]
#
# Which coordinate is dominant?
#
if { $dy < $dx } {
set yminn [expr {0.5*($ymax+$ymin) - 0.5 * $dx * ($pymax-$pymin)}]
set ymaxn [expr {0.5*($ymax+$ymin) + 0.5 * $dx * ($pymax-$pymin)}]
set ymin $yminn
set ymax $ymaxn
} else {
set xminn [expr {0.5*($xmax+$xmin) - 0.5 * $dy * ($pxmax-$pxmin)}]
set xmaxn [expr {0.5*($xmax+$xmin) + 0.5 * $dy * ($pxmax-$pxmin)}]
set xmin $xminn
set xmax $xmaxn
}
worldCoordinates $w $xmin $ymin $xmax $ymax
}
# PlotHandler --
# Handle the subcommands for an XY plot or chart
# Arguments:
# type Type of plot/chart
# w Name of the canvas
# command Subcommand or method to run
# args Data for the command
# Result:
# Whatever returned by the subcommand
#
proc ::Plotchart::PlotHandler { type w command args } {
variable methodProc
if { [info exists methodProc($type,$command)] } {
if { [llength $methodProc($type,$command)] == 1 } {
eval $methodProc($type,$command) $w $args
} else {
eval $methodProc($type,$command)_$w $w $args
}
} else {
return -code error "No such method - $command"
}
}
# DrawMask --
# Draw the stuff that masks the data lines outside the graph
# Arguments:
# w Name of the canvas
# Result:
# None
# Side effects:
# Several polygons drawn in the background colour
#
proc ::Plotchart::DrawMask { w } {
variable scaling
variable config
if { $config($w,mask,draw) == 0 } {
return
}
if { [string match {[0-9]*} $w] } {
set c [string range $w 2 end]
} else {
set c $w
}
set ref $scaling($w,reference)
if { [info exists scaling($ref,boxxmin)] } {
set pxmin $scaling($ref,boxxmin)
set pymin $scaling($ref,boxymin)
set pxmax $scaling($ref,boxxmax)
set pymax $scaling($ref,boxymax)
set offx $scaling($ref,refx)
set offy $scaling($ref,refy)
} else {
set pxmin [expr {$scaling($w,pxmin)-1}]
set pymin [expr {$scaling($w,pymin)-1}]
set pxmax $scaling($w,pxmax)
set pymax $scaling($w,pymax)
set offx 0
set offy 0
}
#set width [expr {[WidthCanvas $w 0] + 1}]
#set height [expr {[HeightCanvas $w 0] + 1}]
set width [expr {$pxmax + $config($w,margin,right)}]
set height [expr {$pymax + $config($w,margin,bottom)}]
set colour $config($w,background,outercolor)
#$w delete "mask && $w"
$w delete "mask && $ref"
$w create rectangle $offx $offy $pxmin $height -fill $colour -outline $colour -tag [list mask $ref]
$w create rectangle $offx $offy $width $pymin -fill $colour -outline $colour -tag [list mask $ref]
$w create rectangle $offx $pymax $width $height -fill $colour -outline $colour -tag [list mask $ref]
$w create rectangle $pxmax $offy $width $height -fill $colour -outline $colour -tag [list mask $ref]
$w lower mask
}
# DrawScrollMask --
# Draw the masking rectangles for a time or Gantt chart
# Arguments:
# w Name of the canvas
# Result:
# None
# Side effects:
# Several polygons drawn in the background colour, with appropriate
# tags
#
proc ::Plotchart::DrawScrollMask { w } {
variable scaling
variable config
set width [expr {[WidthCanvas $w] + 1}]
set height [expr {[HeightCanvas $w] + 1}]
set colour $config($w,background,outercolor)
set pxmin [expr {$scaling($w,pxmin)-1}]
set pxmax $scaling($w,pxmax)
set pymin [expr {$scaling($w,pymin)-1}]
set pymax $scaling($w,pymax)
$w create rectangle 0 0 $pxmin $height -fill $colour -outline $colour -tag vertmask
$w create rectangle 0 0 $width $pymin -fill $colour -outline $colour -tag horizmask
$w create rectangle 0 $pymax $width $height -fill $colour -outline $colour -tag horizmask
$w create rectangle $pxmax 0 $width $height -fill $colour -outline $colour -tag vertmask
$w create rectangle 0 0 $pxmin $pymin -fill $colour -outline $colour -tag {topmask top}
$w create rectangle $pxmax 0 $width $pymin -fill $colour -outline $colour -tag {topmask top}
$w lower topmask
$w lower horizmask
$w lower vertmask
}
# DrawTitle --
# Draw the title
# Arguments:
# w Name of the canvas
# title Title to appear above the graph
# position Position of the title (default: center)
# Result:
# None
# Side effects:
# Text string drawn
#
proc ::Plotchart::DrawTitle { w title {position center}} {
variable scaling
variable config
set ref $scaling($w,reference)
set offx $scaling($ref,refx)
set offy $scaling($ref,refy)
set width [WidthCanvas $w]
#set width [$w cget -width]
set pymin $scaling($w,pymin)
switch -- $position {
"left" {
set tx [expr {$offx + 3}]
set anchor nw
}
"right" {
set tx [expr {$width - 3}]
set anchor ne
}
default {
set tx [expr {($offx + $width)/2}]
set anchor n
}
}
$w delete "title_$anchor && $ref"
set obj [$w create text $tx [expr {$offy + 3 + [$w cget -borderwidth]}] -text $title \
-tags [list title title_$anchor $ref] -font $config($w,title,font) \
-fill $config($w,title,textcolor) -anchor $anchor]
set titlecolour $config($w,title,background)
if { $titlecolour == "" } {
set titlecolour $config($w,background,outercolor)
}
set bbox [$w bbox $obj]
set theight [lindex $bbox end]
set bgobj [$w create rectangle $offx $offy $width $theight -fill $titlecolour -tag [list titlebackground $ref] -outline $titlecolour]
$w raise titlebackground
$w raise title
$w raise ytext
}
# DrawSubtitle --
# Draw the subtitle
# Arguments:
# w Name of the canvas
# title Title to appear above the graph
# Result:
# None
# Side effects:
# Text string drawn
#
proc ::Plotchart::DrawSubtitle { w title } {
variable scaling
variable config
set ref $scaling($w,reference)
set offx $scaling($ref,refx)
set width [WidthCanvas $w]
set pymin $scaling($w,pymin)
set tx [expr {($offx + $width)/2}]
set offy [lindex [$w bbox title] end]
if { $offy == {} } {
set $scaling($ref,refy)
}
$w delete "subtitle && $ref"
set obj [$w create text $tx [expr {$offy + 3 + [$w cget -borderwidth]}] -text $title \
-tags [list subtitle $ref] -font $config($w,subtitle,font) \
-fill $config($w,subtitle,textcolor) -anchor n]
set titlecolour $config($w,subtitle,background)
if { $titlecolour == "" } {
set titlecolour $config($w,background,outercolor)
}
set bbox [$w bbox $obj]
set theight [lindex $bbox end]
set bgobj [$w create rectangle $offx $offy $width $theight -fill $titlecolour -tag [list subtitlebackground $ref] -outline $titlecolour]
$w raise subtitlebackground
$w raise subtitle
$w raise ytext
}
# DrawData --
# Draw the data in an XY-plot
# Arguments:
# w Name of the canvas
# series Data series
# xcrd Next x coordinate
# ycrd Next y coordinate
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawData { w series xcrd ycrd } {
variable data_series
variable scaling
#
# Check for missing values
#
if { $xcrd == "" || $ycrd == "" } {
unset -nocomplain data_series($w,$series,x)
return
}
#
# Draw the line piece
#
set colour "black"
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
set type "line"
if { [info exists data_series($w,$series,-type)] } {
set type $data_series($w,$series,-type)
}
set filled "no"
if { [info exists data_series($w,$series,-filled)] } {
set filled $data_series($w,$series,-filled)
}
set fillcolour white
if { [info exists data_series($w,$series,-fillcolour)] } {
set fillcolour $data_series($w,$series,-fillcolour)
}
set width 1
if { [info exists data_series($w,$series,-width)] } {
set width $data_series($w,$series,-width)
}
foreach {pxcrd pycrd} [coordsToPixel $w $xcrd $ycrd] {break}
if { [info exists data_series($w,$series,x)] } {
set xold $data_series($w,$series,x)
set yold $data_series($w,$series,y)
foreach {pxold pyold} [coordsToPixel $w $xold $yold] {break}
if { $filled ne "no" } {
if { $filled eq "down" } {
set pym $scaling($w,pymax)
} else {
set pym $scaling($w,pymin)
}
$w create polygon $pxold $pym $pxold $pyold $pxcrd $pycrd $pxcrd $pym \
-fill $fillcolour -outline {} -width $width -tag [list data data_$series]
}
if { $type == "line" || $type == "both" } {
$w create line $pxold $pyold $pxcrd $pycrd \
-fill $colour -width $width -tag [list data data_$series]
}
}
if { $type == "symbol" || $type == "both" } {
set symbol "dot"
if { [info exists data_series($w,$series,-symbol)] } {
set symbol $data_series($w,$series,-symbol)
}
DrawSymbolPixel $w $series $pxcrd $pycrd $symbol $colour [list "data" data_$series]
}
$w lower data
set data_series($w,$series,x) $xcrd
set data_series($w,$series,y) $ycrd
}
# DrawStripData --
# Draw the data in a stripchart
# Arguments:
# w Name of the canvas
# series Data series
# xcrd Next x coordinate
# ycrd Next y coordinate
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawStripData { w series xcrd ycrd } {
variable data_series
variable scaling
#
# Check for missing values
#
if { $xcrd == "" || $ycrd == "" } {
unset data_series($w,$series,x)
return
}
if { $xcrd > $scaling($w,xmax) } {
set xdelt $scaling($w,xdelt)
set xmin $scaling($w,xmin)
set xmax $scaling($w,xmax)
set xminorg $xmin
while { $xmax < $xcrd } {
set xmin [expr {$xmin+$xdelt}]
set xmax [expr {$xmax+$xdelt}]
}
set ymin $scaling($w,ymin)
set ymax $scaling($w,ymax)
worldCoordinates $w $xmin $ymin $xmax $ymax
DrawXaxis $w $xmin $xmax $xdelt
foreach {pxminorg pyminorg} [coordsToPixel $w $xminorg $ymin] {break}
foreach {pxmin pymin} [coordsToPixel $w $xmin $ymin] {break}
$w move data [expr {$pxminorg-$pxmin+1}] 0
}
DrawData $w $series $xcrd $ycrd
}
# DrawLogYData --
# Draw the data in an X-logY-plot
# Arguments:
# w Name of the canvas
# series Data series
# xcrd Next x coordinate
# ycrd Next y coordinate
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawLogYData { w series xcrd ycrd } {
DrawData $w $series $xcrd [expr {log10($ycrd)}]
}
# DrawLogXData --
# Draw the data in an logX-Y-plot
# Arguments:
# w Name of the canvas
# series Data series
# xcrd Next x coordinate
# ycrd Next y coordinate
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawLogXData { w series xcrd ycrd } {
DrawData $w $series [expr {log10($xcrd)}] $ycrd
}
# DrawLogXLogYData --
# Draw the data in an logX-logY-plot
# Arguments:
# w Name of the canvas
# series Data series
# xcrd Next x coordinate
# ycrd Next y coordinate
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawLogXLogYData { w series xcrd ycrd } {
DrawData $w $series [expr {log10($xcrd)}] [expr {log10($ycrd)}]
}
# DrawInterval --
# Draw the data as an error interval in an XY-plot
# Arguments:
# w Name of the canvas
# series Data series
# xcrd X coordinate
# ymin Minimum y coordinate
# ymax Maximum y coordinate
# ycentr Central y coordinate (optional)
# Result:
# None
# Side effects:
# New interval drawn in canvas
#
proc ::Plotchart::DrawInterval { w series xcrd ymin ymax {ycentr {}} } {
variable data_series
variable scaling
#
# Check for missing values
#
if { $xcrd == "" || $ymin == "" || $ymax == "" } {
return
}
#
# Draw the line piece
#
set colour "black"
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
foreach {pxcrd pymin} [coordsToPixel $w $xcrd $ymin] {break}
foreach {pxcrd pymax} [coordsToPixel $w $xcrd $ymax] {break}
if { $ycentr != "" } {
foreach {pxcrd pycentr} [coordsToPixel $w $xcrd $ycentr] {break}
}
#
# Draw the I-shape (note the asymmetry!)
#
$w create line $pxcrd $pymin $pxcrd $pymax \
-fill $colour -tag [list data data_$series]
$w create line [expr {$pxcrd-3}] $pymin [expr {$pxcrd+4}] $pymin \
-fill $colour -tag [list data data_$series]
$w create line [expr {$pxcrd-3}] $pymax [expr {$pxcrd+4}] $pymax \
-fill $colour -tag [list data data_$series]
if { $ycentr != "" } {
set symbol "dot"
if { [info exists data_series($w,$series,-symbol)] } {
set symbol $data_series($w,$series,-symbol)
}
DrawSymbolPixel $w $series $pxcrd $pycentr $symbol $colour [list data data_$series]
}
$w lower data
}
# DrawSymbolPixel --
# Draw a symbol in an xy-plot, polar plot or stripchart
# Arguments:
# w Name of the canvas
# series Data series
# pxcrd Next x (pixel) coordinate
# pycrd Next y (pixel) coordinate
# symbol What symbol to draw
# colour What colour to use
# tag What tag to use
# Result:
# None
# Side effects:
# New symbol drawn in canvas
#
proc ::Plotchart::DrawSymbolPixel { w series pxcrd pycrd symbol colour tag } {
variable data_series
variable scaling
set radius 4
if { [info exists data_series($w,$series,-radius)] } {
set radius $data_series($w,$series,-radius)
}
set pxmin [expr {$pxcrd - $radius}]
set pxmax [expr {$pxcrd + $radius}]
set pymin [expr {$pycrd - $radius}]
set pymax [expr {$pycrd + $radius}]
switch -- $symbol {
"plus" { $w create line $pxmin $pycrd $pxmax $pycrd \
$pxcrd $pycrd $pxcrd $pymin \
$pxcrd $pymax \
-fill $colour -tag $tag \
-capstyle projecting
}
"cross" { $w create line $pxmin $pymin $pxmax $pymax \
$pxcrd $pycrd $pxmax $pymin \
$pxmin $pymax \
-fill $colour -tag $tag \
-capstyle projecting
}
"circle" { $w create oval $pxmin $pymin $pxmax $pymax \
-outline $colour -tag $tag
}
"dot" { $w create oval $pxmin $pymin $pxmax $pymax \
-outline $colour -fill $colour -tag $tag
}
"up" { $w create polygon $pxmin $pymax $pxmax $pymax \
$pxcrd $pymin \
-outline $colour -fill {} -tag $tag
}
"upfilled" { $w create polygon $pxmin $pymax $pxmax $pymax \
$pxcrd $pymin \
-outline $colour -fill $colour -tag $tag
}
"down" { $w create polygon $pxmin $pymin $pxmax $pymin \
$pxcrd $pymax \
-outline $colour -fill {} -tag $tag
}
"downfilled" { $w create polygon $pxmin $pymin $pxmax $pymin \
$pxcrd $pymax \
-outline $colour -fill $colour -tag $tag
}
}
}
# DrawTimeData --
# Draw the data in an TX-plot
# Arguments:
# w Name of the canvas
# series Data series
# time Next date/time value
# xcrd Next x coordinate (vertical axis)
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawTimeData { w series time xcrd } {
DrawData $w $series [clock scan $time] $xcrd
}
# DetermineMedian --
# Determine the median of a sorted list of values
# Arguments:
# values Sorted values
# Result:
# Median value
#
proc ::Plotchart::DetermineMedian { values } {
set length [llength $values]
if { $length == 1 } {
set median [lindex $values 0]
} elseif { $length % 2 == 1 } {
set median [lindex $values [expr {$length/2}]]
} else {
set median1 [lindex $values [expr {$length/2-1}]]
set median2 [lindex $values [expr {$length/2}]]
set median [expr {($median1 + $median2)/2.0}]
}
return $median
}
# DrawBoxWhiskers --
# Draw the data in an XY-plot as box-and-whiskers
# Arguments:
# w Name of the canvas
# series Data series
# xcrd Next x coordinate or a list of values
# ycrd Next y coordinate or a list of values
# Result:
# None
# Side effects:
# New data drawn in canvas
# Note:
# We can do either a horizontal box (one y value) or
# a vertical box (one x value). Not both
#
proc ::Plotchart::DrawBoxWhiskers { w series xcrd ycrd } {
variable data_series
variable scaling
#
# Check orientation
#
set type "?"
if { [llength $xcrd] > 1 && [llength $ycrd] == 1 } {
set type h
}
if { [llength $xcrd] == 1 && [llength $ycrd] > 1 } {
set type v
}
if { $type == "?" } {
return -code error "Use either a list of x values or a list of y values - not both"
}
#
# Determine the quartiles:
#
# quartile1 is the 25% quantile
# quartile2 is the 50% quantile (the median value)
# quartile3 is the 75% quantile
#
# also
# values between 'lower'/'upper' and outlower'/'outupper' are values within 1.5*IQR - 3*IQR (drawn as a dot)
# values outside 'outlower'/'outupper' are values outside 3*IQR (drawn as a star)
#
# quartile1 is the 25% quantile
# quartile2 is the 50% quantile (the median value)
# quartile3 is the 75% quantile
#
# also
# values between 'lower'/'upper' and outlower'/'outupper' are values within 1.5*IQR - 3*IQR (drawn as a dot)
# values outside 'outlower'/'outupper' are values outside 3*IQR (drawn as a star)
#
if { $type == "h" } {
set data [lsort -real -increasing $xcrd]
} else {
set data [lsort -real -increasing $ycrd]
}
set length [llength $data]
if { $length % 2 == 0 } {
set lowerhalf [expr {($length-1)/2}]
set upperhalf [expr {($length+1)/2}]
} else {
set lowerhalf [expr {$length/2-1}]
set upperhalf [expr {$length/2+1}]
}
set quartile2 [DetermineMedian $data]
set quartile1 [DetermineMedian [lrange $data 0 $lowerhalf]]
set quartile3 [DetermineMedian [lrange $data $upperhalf end]]
set hspread [expr {$quartile3-$quartile1}]
set lower [expr {$quartile1-1.5*$hspread}]
set upper [expr {$quartile3+1.5*$hspread}]
set outlower [expr {$quartile1-3.0*$hspread}]
set outupper [expr {$quartile3+3.0*$hspread}]
set whisker IQR
if { [info exists data_series($w,$series,-whisker)] } {
set whisker $data_series($w,$series,-whisker)
}
if { $whisker eq "extremes" } {
set minimum [lindex $data 0]
set maximum [lindex $data end]
} elseif { $whisker eq "IQR" || $whisker eq "iqr" } {
set minimum {}
set maximum {}
foreach value $data {
if { $value >= $lower } {
if { $minimum == {} || $minimum > $value } {
set minimum $value
}
}
if { $value <= $upper } {
if { $maximum == {} || $maximum < $value } {
set maximum $value
}
}
}
} elseif { $whisker eq "none"} {
# nop
} else {
return -code error "unknown value '$whisker' for -whisker option"
}
#
# Draw the box and whiskers
#
set colour "black"
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
set mediancolour $colour
if { [info exists data_series($w,$series,-mediancolour)] } {
set mediancolour $data_series($w,$series,-mediancolour)
}
set mediancolour $colour
if { [info exists data_series($w,$series,-mediancolour)] } {
set mediancolour $data_series($w,$series,-mediancolour)
}
set filled "no"
if { [info exists data_series($w,$series,-filled)] } {
set filled $data_series($w,$series,-filled)
}
set fillcolour white
if { [info exists data_series($w,$series,-fillcolour)] } {
set fillcolour $data_series($w,$series,-fillcolour)
}
set boxwidth 10
if { [info exists data_series($w,$series,-boxwidth)] } {
set boxwidth $data_series($w,$series,-boxwidth)
}
set medianwidth 2
if { [info exists data_series($w,$series,-medianwidth)] } {
set medianwidth $data_series($w,$series,-medianwidth)
}
set whiskerwidth 1
if { [info exists data_series($w,$series,-whiskerwidth)] } {
set whiskerwidth $data_series($w,$series,-whiskerwidth)
}
if { $type == "h" } {
#
# Horizontal boxplot:
#
foreach {pxcrd1 pycrd2} [coordsToPixel $w $quartile1 $ycrd] {break}
foreach {pxcrd2 pycrd2} [coordsToPixel $w $quartile2 $ycrd] {break}
foreach {pxcrd3 pycrd2} [coordsToPixel $w $quartile3 $ycrd] {break}
if {$whisker ne "none"} {
foreach {pxcrdm pycrd1} [coordsToPixel $w $minimum $ycrd] {break}
foreach {pxcrdM pycrd2} [coordsToPixel $w $maximum $ycrd] {break}
set pycrd0h [expr {$pycrd1-$boxwidth/4}]
set pycrd2h [expr {$pycrd1+$boxwidth/4}]
} else {
foreach {- pycrd1} [coordsToPixel $w 0 $ycrd] {break}
}
set pycrd0 [expr {$pycrd1-$boxwidth/2}]
set pycrd2 [expr {$pycrd1+$boxwidth/2}]
if {$whisker ne "none"} {
#
# Left whisker:
#
$w create line $pxcrdm $pycrd1 $pxcrd1 $pycrd1 \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
$w create line $pxcrdm $pycrd0h $pxcrdm $pycrd2h \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
# right whisker:
#
# Right whisker:
#
$w create line $pxcrd3 $pycrd1 $pxcrdM $pycrd1 \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
$w create line $pxcrdM $pycrd0h $pxcrdM $pycrd2h \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
}
#
# Box:
#
$w create rectangle $pxcrd1 $pycrd0 $pxcrd3 $pycrd2 \
-outline $colour -fill $fillcolour -tag [list data data_$series]
#
# Median:
#
$w create line $pxcrd2 $pycrd0 $pxcrd2 $pycrd2 -width $medianwidth \
-fill $mediancolour -tag [list data data_$series]
if {$whisker eq "IQR"} {
foreach value $data {
if { $value < $outlower || $value > $outupper } {
foreach {px py} [coordsToPixel $w $value $ycrd] {break}
$w create text $px $py -text "*" -anchor c \
-fill $colour -tag [list data data_$series]
continue
}
if { $value < $lower || $value > $upper } {
foreach {px py} [coordsToPixel $w $value $ycrd] {break}
$w create oval [expr {$px-2}] [expr {$py-2}] \
[expr {$px+2}] [expr {$py+2}] \
-fill $colour -tag [list data data_$series]
continue
}
}
}
} else {
#
# Vertical boxplot:
#
foreach {pxcrd2 pycrd1} [coordsToPixel $w $xcrd $quartile1] {break}
foreach {pxcrd2 pycrd2} [coordsToPixel $w $xcrd $quartile2] {break}
foreach {pxcrd2 pycrd3} [coordsToPixel $w $xcrd $quartile3] {break}
if {$whisker ne "none"} {
foreach {pxcrd1 pycrdm} [coordsToPixel $w $xcrd $minimum] {break}
foreach {pxcrd2 pycrdM} [coordsToPixel $w $xcrd $maximum] {break}
set pxcrd0h [expr {$pxcrd1-$boxwidth/4}]
set pxcrd2h [expr {$pxcrd1+$boxwidth/4}]
} else {
foreach {pxcrd1 -} [coordsToPixel $w $xcrd 0] {break}
}
set pxcrd0 [expr {$pxcrd1-$boxwidth/2}]
set pxcrd2 [expr {$pxcrd1+$boxwidth/2}]
if {$whisker ne "none"} {
#
# Lower whisker:
#
$w create line $pxcrd1 $pycrdm $pxcrd1 $pycrd1 \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
$w create line $pxcrd0h $pycrdm $pxcrd2h $pycrdm \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
# upper whisker:
#
# Upper whisker:
#
$w create line $pxcrd1 $pycrd3 $pxcrd1 $pycrdM \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
$w create line $pxcrd0h $pycrdM $pxcrd2h $pycrdM \
-fill $colour -tag [list data data_$series] -width $whiskerwidth
}
#
# Box:
#
$w create rectangle $pxcrd0 $pycrd1 $pxcrd2 $pycrd3 \
-outline $colour -fill $fillcolour -tag [list data data_$series]
#
# Median:
#
$w create line $pxcrd0 $pycrd2 $pxcrd2 $pycrd2 -width $medianwidth \
-fill $mediancolour -tag [list data data_$series]
if {$whisker eq "IQR"} {
foreach value $data {
if { $value < $outlower || $value > $outupper } {
foreach {px py} [coordsToPixel $w $xcrd $value] {break}
$w create text $px $py -text "*" \
-fill $colour -tag [list data data_$series]
continue
}
if { $value < $lower || $value > $upper } {
foreach {px py} [coordsToPixel $w $xcrd $value] {break}
$w create oval [expr {$px-3}] [expr {$py-3}] \
[expr {$px+3}] [expr {$py+3}] \
-fill $colour -tag [list data data_$series]
continue
}
}
}
}
$w lower data
}
# DrawBoxData --
# Draw the data in a boxplot
# where either the x-axis or the y-axis consists of labels
# Arguments:
# w Name of the canvas
# series Data series
# label Label on the x- or y-axis to put the box on
# values List of values to plot the box and whiskers for
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawBoxData { w series label values } {
variable config
variable scaling
variable settings
set index [lsearch $config($w,axisnames) $label]
if { $index == -1 } {
return "Label $label not found on axis"
}
set coord [expr {$index + 1}]
if { $settings($w,orientation) eq "vertical" } {
DrawBoxWhiskers $w $series $coord $values
} else {
DrawBoxWhiskers $w $series $values $coord
}
}
# DrawPie --
# Draw the pie
# Arguments:
# w Name of the canvas
# data Data series (pairs of label-value)
# Result:
# None
# Side effects:
# Pie filled
#
proc ::Plotchart::DrawPie { w data } {
variable data_series
variable scaling
variable config
set pxmin $scaling($w,pxmin)
set pymin $scaling($w,pymin)
set pxmax $scaling($w,pxmax)
set pymax $scaling($w,pymax)
set colours $scaling(${w},colours)
if {[llength ${data}] == 2} {
# use canvas create oval as arc does not fill with colour for a full circle
set colour [lindex ${colours} 0]
${w} create oval ${pxmin} ${pymin} ${pxmax} ${pymax} -fill ${colour} \
-width $config($w,slice,outlinewidth) -outline $config($w,slice,outline)
# text looks nicer at 45 degree
set rad [expr {45.0 * 3.1415926 / 180.0}]
set xtext [expr {(${pxmin}+${pxmax}+cos(${rad})*(${pxmax}-${pxmin}+20))/2}]
set ytext [expr {(${pymin}+${pymax}-sin(${rad})*(${pymax}-${pymin}+20))/2}]
foreach {label value} ${data} {
break
}
if { $config($w,labels,shownumbers) } {
if { $config($w,labels,format) ne "" } {
set label [format $config($w,labels,formatright) $value $label]
} else {
set label [format $config($w,labels,format) $label $value]
}
}
${w} create text ${xtext} ${ytext} -text ${label} -anchor w -font $config($w,labels,font)
set scaling($w,angles) {0 360}
} else {
#
# Determine the scale for the values
# (so we can draw the correct angles)
#
set newdata {}
set sum 0.0
foreach {label value} $data {
lappend newdata [list $value $label]
set sum [expr {$sum + $value}]
}
set factor [expr {360.0/$sum}]
set data $newdata
if { $config($w,labels,sorted) } {
set data [lsort -index 0 -real $newdata]
}
#
# Draw the line piece
#
set angle_init $config($w,slice,startangle)
set op $config($w,slice,direction)
set sum 0.0
set idx 0
set segment 0
array unset scaling ${w},angles
array unset scaling ${w},extent
set colours [CycleColours ${colours} [expr {[llength ${data}] / 2}]]
foreach sublist $data {
foreach {value label} $sublist {break}
set colour [lindex $colours $idx]
incr idx
if { $value == "" } {
break
}
set angle_bgn [expr $angle_init $op ($sum * $factor)]
set angle_ext $op[expr {$value * $factor}]
lappend scaling(${w},angles) [expr {int(${angle_bgn})}]
lappend scaling(${w},extent) [expr {int(${angle_ext})}]
$w create arc $pxmin $pymin $pxmax $pymax \
-start $angle_bgn -extent $angle_ext \
-fill $colour -style pieslice -tag [list data segment_$segment] \
-width $config($w,slice,outlinewidth) -outline $config($w,slice,outline)
set rad [expr {($angle_bgn+0.5*$angle_ext)*3.1415926/180.0}]
# hack for label positioning 'out' or 'in':
if {$config($w,labels,placement) eq "out"} {
set xtext [expr {($pxmin+$pxmax+cos($rad)*($pxmax-$pxmin+20))/2}]
set ytext [expr {($pymin+$pymax-sin($rad)*($pymax-$pymin+20))/2}]
if { $xtext > ($pxmin+$pxmax)/2 } {
set dir w
} else {
set dir e
}
} elseif {$config($w,labels,placement) eq "in"} {
set dir c
set centerx [expr {$pxmax - ($pxmax-$pxmin)/2.0}]
set centery [expr {$pymax - ($pymax-$pymin)/2.0}]
# 33% from the center to the radius
set xtext [expr {$centerx + cos($rad)*($pxmax-$pxmin)*0.33}]
set ytext [expr {$centery - sin($rad)*($pymax-$pymin)*0.33}]
}
if { $config($w,labels,shownumbers) } {
if { $dir eq "w" && $config($w,labels,formatright) ne "" } {
set label [format $config($w,labels,formatright) $value $label]
} else {
set label [format $config($w,labels,format) $label $value]
}
}
$w create text $xtext $ytext -text $label -anchor $dir -tag segment_$segment \
-font $config($w,labels,font) -fill $config($w,labels,textcolor)
$w bind segment_$segment <ButtonPress-1> [list ::Plotchart::PieExplodeSegment $w $segment 1]
set sum [expr {$sum + $value}]
incr segment
}
}
}
# DrawSpiralPie --
# Draw the spiral pie
# Arguments:
# w Name of the canvas
# data Data series (pairs of label-value)
# Result:
# None
# Side effects:
# Pie filled
#
proc ::Plotchart::DrawSpiralPie { w data } {
variable data_series
variable scaling
variable config
set pxmin $scaling($w,pxmin)
set pymin $scaling($w,pymin)
set pxmax $scaling($w,pxmax)
set pymax $scaling($w,pymax)
set colours $scaling(${w},colours)
if {[llength ${data}] == 2} {
# use canvas create oval as arc does not fill with colour for a full circle
set colour [lindex ${colours} 0]
${w} create oval ${pxmin} ${pymin} ${pxmax} ${pymax} -fill ${colour} \
-width $config($w,slice,outlinewidth) -outline $config($w,slice,outline)
# text looks nicer at 45 degree
set rad [expr {45.0 * 3.1415926 / 180.0}]
set xtext [expr {(${pxmin}+${pxmax}+cos(${rad})*(${pxmax}-${pxmin}+20))/2}]
set ytext [expr {(${pymin}+${pymax}-sin(${rad})*(${pymax}-${pymin}+20))/2}]
foreach {label value} ${data} {
break
}
if { $config($w,labels,shownumbers) } {
if { $config($w,labels,format) ne "" } {
set label [format $config($w,labels,formatright) $value $label]
} else {
set label [format $config($w,labels,format) $label $value]
}
}
${w} create text ${xtext} ${ytext} -text ${label} -anchor w -font $config($w,labels,font)
set scaling($w,angles) {0 360}
} else {
#
# Determine the scale for the values
# (so we can draw the correct radii)
#
set maxvalue [lindex $data 1]
set newdata {}
foreach {label value} $data {
lappend newdata [list $value $label]
if { $maxvalue < $value } {
set maxvalue $value
}
}
set data $newdata
if { $config($w,labels,sorted) } {
set data [lsort -index 0 -real $newdata]
}
set factor [expr {1.0/sqrt($maxvalue)}]
set dangle [expr {360.0/[llength $data]}]
#
# Draw the line piece
#
set angle_init $config($w,slice,startangle)
set op $config($w,slice,direction)
set sum 0.0
set idx 0
set segment 0
array unset scaling ${w},angles
array unset scaling ${w},extent
set colours [CycleColours ${colours} [llength ${data}]]
foreach sublist $data {
foreach {value label} $sublist {break}
set colour [lindex $colours $idx]
incr idx
if { $value == "" } {
break
}
set angle_bgn [expr $angle_init $op $sum]
set angle_ext [expr $op $dangle]
lappend scaling(${w},angles) [expr {int(${angle_bgn})}]
lappend scaling(${w},extent) [expr {int(${angle_ext})}]
set slicexmin [expr {0.5 * ($pxmax + $pxmin - sqrt($value) * $factor * ($pxmax-$pxmin))}]
set slicexmax [expr {0.5 * ($pxmax + $pxmin + sqrt($value) * $factor * ($pxmax-$pxmin))}]
set sliceymin [expr {0.5 * ($pymax + $pymin - sqrt($value) * $factor * ($pymax-$pymin))}]
set sliceymax [expr {0.5 * ($pymax + $pymin + sqrt($value) * $factor * ($pymax-$pymin))}]
$w create arc $slicexmin $sliceymin $slicexmax $sliceymax \
-start $angle_bgn -extent $angle_ext \
-fill $colour -style pieslice -tag [list data segment_$segment] \
-width $config($w,slice,outlinewidth) -outline $config($w,slice,outline)
set rad [expr {($angle_bgn+0.5*$angle_ext)*3.1415926/180.0}]
# hack for label positioning 'out' or 'in':
if {$config($w,labels,placement) eq "out"} {
set xtext [expr {($slicexmin+$slicexmax+cos($rad)*($slicexmax-$slicexmin+20))/2}]
set ytext [expr {($sliceymin+$sliceymax-sin($rad)*($sliceymax-$sliceymin+20))/2}]
if { $xtext > ($slicexmin+$sliceymax)/2 } {
set dir w
} else {
set dir e
}
} elseif {$config($w,labels,placement) eq "in"} {
set dir c
set centerx [expr {$slicexmax - ($slicexmax-$slicexmin)/2.0}]
set centery [expr {$sliceymax - ($sliceymax-$sliceymin)/2.0}]
# 33% from the center to the radius
set xtext [expr {$centerx + cos($rad)*($slicexmax-$slicexmin)*0.33}]
set ytext [expr {$centery - sin($rad)*($sliceymax-$sliceymin)*0.33}]
}
if { $config($w,labels,shownumbers) } {
if { $dir eq "w" && $config($w,labels,formatright) ne "" } {
set label [format $config($w,labels,formatright) $value $label]
} else {
set label [format $config($w,labels,format) $label $value]
}
}
$w create text $xtext $ytext -text $label -anchor $dir -tag segment_$segment \
-font $config($w,labels,font) -fill $config($w,labels,textcolor)
$w bind segment_$segment <ButtonPress-1> [list ::Plotchart::PieExplodeSegment $w $segment 1]
set sum [expr {$sum + $dangle}]
incr segment
}
}
}
# DrawPolarData --
# Draw data given in polar coordinates
# Arguments:
# w Name of the canvas
# series Data series
# rad Next radius
# phi Next angle (in degrees)
# Result:
# None
# Side effects:
# Data drawn in canvas
#
proc ::Plotchart::DrawPolarData { w series rad phi } {
variable torad
set xcrd [expr {$rad*cos($phi*$torad)}]
set ycrd [expr {$rad*sin($phi*$torad)}]
DrawData $w $series $xcrd $ycrd
}
# DrawVertBarData --
# Draw the vertical bars
# Arguments:
# w Name of the canvas
# series Data series
# ydata Series of y data
# colour The colour to use (optional)
# dir Direction if graded colours are used (see DrawGradientBackground)
# brightness Brighten (bright) or darken (dark) the colours
# Result:
# None
# Side effects:
# Data bars drawn in canvas
#
proc ::Plotchart::DrawVertBarData { w series ydata {colour black} {dir {}} {brightness bright}} {
variable data_series
variable scaling
variable legend
variable settings
variable config
#
# Draw the bars
#
set x $scaling($w,xbase)
#
# set the colours
#
if {[llength ${colour}]} {
set colours ${colour}
} elseif {[info exists scaling(${w},colours)]} {
set colours $scaling(${w},colours)
} else {
set colours {}
}
set colours [CycleColours ${colours} [llength ${ydata}]]
#
# Legend information
#
set legendcol [lindex $colours 0]
set data_series($w,$series,-colour) $legendcol
set data_series($w,$series,-type) rectangle
if { [info exists legend($w,canvas)] } {
set legendw $legend($w,canvas)
$legendw itemconfigure $series -fill $legendcol
}
set newbase {}
set idx 0
foreach yvalue $ydata ybase $scaling($w,ybase) {
set colour [lindex ${colours} ${idx}]
incr idx
if { $yvalue == "" } {
set yvalue 0.0
}
set xnext [expr {$x+$scaling($w,barwidth)}]
set y [expr {$yvalue+$ybase}]
foreach {px1 py1} [coordsToPixel $w $x $ybase] {break}
foreach {px2 py2} [coordsToPixel $w $xnext $y ] {break}
if { $dir == {} } {
$w create rectangle $px1 $py1 $px2 $py2 \
-fill $colour -outline $config($w,bar,outline) -tag [list data $w data_$series]
} else {
if { $brightness == "dark" } {
set intensity black
} else {
set intensity white
}
DrawGradientBackground $w $colour $dir $intensity [list $px1 $py1 $px2 $py2]
}
if { $settings($w,showvalues) } {
set pxtext [expr {($px1+$px2)/2.0}]
set pytext [expr {$py2-5}]
set text [format $settings($w,valueformat) $yvalue]
if { $settings($w,valuefont) == "" } {
$w create text $pxtext $pytext -text $text -anchor s \
-fill $settings($w,valuecolour) -tag [list data $w data_$series]
} else {
$w create text $pxtext $pytext -text $text -anchor s \
-fill $settings($w,valuecolour) -tag [list data $w data_$series] \
-font $settings($w,valuefont)
}
}
$w lower [list data && $w]
set x [expr {$x+1.0}]
lappend newbase $y
}
#
# Prepare for the next series
#
if { $scaling($w,stacked) } {
set scaling($w,ybase) $newbase
}
set scaling($w,xbase) [expr {$scaling($w,xbase)+$scaling($w,xshift)}]
}
# DrawHorizBarData --
# Draw the horizontal bars
# Arguments:
# w Name of the canvas
# series Data series
# xdata Series of x data
# colour The colour to use (optional)
# dir Direction if graded colours are used (see DrawGradientBackground)
# brightness Brighten (bright) or darken (dark) the colours
# Result:
# None
# Side effects:
# Data bars drawn in canvas
#
proc ::Plotchart::DrawHorizBarData { w series xdata {colour black} {dir {}} {brightness bright}} {
variable data_series
variable scaling
variable legend
variable settings
variable config
#
# Draw the bars
#
set y $scaling($w,ybase)
#
# set the colours
#
if {[llength ${colour}]} {
set colours ${colour}
} elseif {[info exists scaling(${w},colours)]} {
set colours $scaling(${w},colours)
} else {
set colours {}
}
set colours [CycleColours ${colours} [llength ${xdata}]]
#
# Legend information
#
set legendcol [lindex $colours 0]
set data_series($w,$series,-colour) $legendcol
if { [info exists legend($w,canvas)] } {
set legendw $legend($w,canvas)
$legendw itemconfigure $series -fill $legendcol
}
set newbase {}
set idx 0
foreach xvalue $xdata xbase $scaling($w,xbase) {
set colour [lindex ${colours} ${idx}]
incr idx
if { $xvalue == "" } {
set xvalue 0.0
}
set ynext [expr {$y+$scaling($w,barwidth)}]
set x [expr {$xvalue+$xbase}]
foreach {px1 py1} [coordsToPixel $w $xbase $y ] {break}
foreach {px2 py2} [coordsToPixel $w $x $ynext] {break}
if { $dir == {} } {
$w create rectangle $px1 $py1 $px2 $py2 \
-fill $colour -outline $config($w,bar,outline) -tag [list data $w data_$series]
} else {
if { $brightness == "dark" } {
set intensity black
} else {
set intensity white
}
DrawGradientBackground $w $colour $dir $intensity [list $px1 $py1 $px2 $py2]
}
if { $settings($w,showvalues) } {
set pytext [expr {($py1+$py2)/2.0}]
set pxtext [expr {$px2+5}]
set text [format $settings($w,valueformat) $xvalue]
if { $settings($w,valuefont) == "" } {
$w create text $pxtext $pytext -text $text -anchor w \
-fill $settings($w,valuecolour) -tag [list data $w data_$series]
} else {
$w create text $pxtext $pytext -text $text -anchor w \
-fill $settings($w,valuecolour) -tag [list data $w data_$series] \
-font $settings($w,valuefont)
}
}
$w lower [list data && $w]
set y [expr {$y+1.0}]
lappend newbase $x
}
#
# Prepare for the next series
#
if { $scaling($w,stacked) } {
set scaling($w,xbase) $newbase
}
set scaling($w,ybase) [expr {$scaling($w,ybase)+$scaling($w,yshift)}]
}
# DrawHistogramData --
# Draw the vertical bars (or lines or symbols) for a histogram
# Arguments:
# w Name of the canvas
# series Data series
# xcrd X coordinate (for the righthand side of the bar)
# ycrd Y coordinate
# Result:
# None
# Side effects:
# Data bars drawn in canvas
#
proc ::Plotchart::DrawHistogramData { w series xcrd ycrd } {
variable data_series
variable scaling
#
# Check for missing values (only y-value can be missing!)
#
if { $ycrd == "" } {
set data_series($w,$series,x) $xcrd
return
}
#
# Draw the bar/line
#
set colour "black"
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
set fillcolour "black"
if { [info exists data_series($w,$series,-fillcolour)] } {
set fillcolour $data_series($w,$series,-fillcolour)
}
set width 1
if { [info exists data_series($w,$series,-width)] } {
set width $data_series($w,$series,-width)
}
set style "filled"
if { [info exists data_series($w,$series,-style)] } {
set style $data_series($w,$series,-style)
}
if { $style == "symbol" } {
set symbol "plus"
if { [info exists data_series($w,$series,-symbol)] } {
set symbol $data_series($w,$series,-symbol)
}
}
foreach {pxcrd pycrd} [coordsToPixel $w $xcrd $ycrd] {break}
if { [info exists data_series($w,$series,x)] } {
set xold $data_series($w,$series,x)
set pystair $data_series($w,$series,pystair)
} else {
set xold $scaling($w,xmin)
set pystair $scaling($w,pymax)
}
set yold $scaling($w,ymin)
foreach {pxold pyold} [coordsToPixel $w $xold $yold] {break}
switch -- $style {
"filled" {
$w create rectangle $pxold $pyold $pxcrd $pycrd \
-fill $fillcolour -outline {} -tag [list data $w data_$series]
$w create line $pxold $pystair $pxold $pycrd $pxcrd $pycrd \
-fill $colour -width $width -tag [list data $w data_$series]
}
"stair" {
$w create line $pxold $pystair $pxold $pycrd $pxcrd $pycrd \
-fill $colour -width $width -tag [list data $w data_$series]
}
"spike" {
$w create line $pxcrd $pyold $pxcrd $pycrd \
-fill $colour -width $width -tag [list data $w data_$series]
}
"plateau" {
$w create line $pxold $pycrd $pxold $pycrd $pxcrd $pycrd \
-fill $colour -width $width -tag [list data $w data_$series]
}
"symbol" {
DrawSymbolPixel $w $series $pxcrd $pycrd $symbol $colour [list data $w data_$series]
}
}
$w lower [list data && $w]
set data_series($w,$series,x) $xcrd
set data_series($w,$series,pystair) $pycrd
#
# Store the data for use in bindlast subcommand
#
set data_series($w,$series,px1) $pxold
set data_series($w,$series,py1) $pyold
set data_series($w,$series,px2) $pxcrd
set data_series($w,$series,py2) $pycrd
if { $style == "symbol" } {
set data_series($w,$series,px1) $pxcrd
set data_series($w,$series,py1) $pycrd
}
}
# DrawHistogramCumulative --
# Draw the vertical bars for a histogram - accumulate the data
# Arguments:
# w Name of the canvas
# series Data series
# xcrd X coordinate (for the righthand side of the bar)
# ycrd Y coordinate
# Result:
# None
# Side effects:
# Data bars drawn in canvas
#
proc ::Plotchart::DrawHistogramCumulative { w series xcrd ycrd } {
variable data_series
variable scaling
#
# Check for missing values (only y-value can be missing!)
#
if { $ycrd == "" } {
set data_series($w,$series,x) $xcrd
return
}
#
# Prepare the data
#
if { [info exists data_series($w,$series,y)] } {
set ycrd [expr {$data_series($w,$series,y) + $ycrd}]
}
DrawHistogramData $w $series $xcrd $ycrd
set data_series($w,$series,y) $ycrd
}
# DrawTimePeriod --
# Draw a period
# Arguments:
# w Name of the canvas
# text Text to identify the "period" item
# time_begin Start time
# time_end Stop time
# colour The colour to use (optional)
# Result:
# None
# Side effects:
# Data bars drawn in canvas
#
proc ::Plotchart::DrawTimePeriod { w text time_begin time_end {colour black}} {
variable data_series
variable scaling
#
# Draw the text first
#
set ytext [expr {$scaling($w,current)+0.5*$scaling($w,dy)}]
foreach {x y} [coordsToPixel $w $scaling($w,xmin) $ytext] {break}
$w create text 5 $y -text $text -anchor w \
-tags [list vertscroll above item_[expr {int($scaling($w,current))}]]
#
# Draw the bar to indicate the period
#
set xmin [clock scan $time_begin]
set xmax [clock scan $time_end]
set ybott [expr {$scaling($w,current)+$scaling($w,dy)}]
foreach {x1 y1} [coordsToPixel $w $xmin $scaling($w,current)] {break}
foreach {x2 y2} [coordsToPixel $w $xmax $ybott ] {break}
$w create rectangle $x1 $y1 $x2 $y2 -fill $colour \
-tags [list $w vertscroll horizscroll below item_[expr {int($scaling($w,current))}]]
ReorderChartItems $w
set scaling($w,current) [expr {$scaling($w,current)-1.0}]
RescaleChart $w
}
# DrawTimeVertLine --
# Draw a vertical line with a label
# Arguments:
# w Name of the canvas
# text Text to identify the line
# time Time for which the line is drawn
# Result:
# None
# Side effects:
# Line drawn in canvas
#
proc ::Plotchart::DrawTimeVertLine { w text time {colour black}} {
variable data_series
variable scaling
#
# Draw the text first
#
set xtime [clock scan $time]
#set ytext [expr {$scaling($w,ymax)-0.5*$scaling($w,dy)}]
set ytext $scaling($w,ymax)
foreach {x y} [coordsToPixel $w $xtime $ytext] {break}
set y [expr {$y-5}]
$w create text $x $y -text $text -anchor sw -tags [list $w horizscroll timeline]
#
# Draw the line
#
foreach {x1 y1} [coordsToPixel $w $xtime $scaling($w,ymin)] {break}
foreach {x2 y2} [coordsToPixel $w $xtime $scaling($w,ymax)] {break}
$w create line $x1 $y1 $x2 $y2 -fill black -tags [list $w horizscroll timeline tline]
$w raise topmask
}
# DrawTimeMilestone --
# Draw a "milestone"
# Arguments:
# w Name of the canvas
# text Text to identify the line
# time Time for which the milestone is drawn
# colour Optionally the colour
# Result:
# None
# Side effects:
# Line drawn in canvas
#
proc ::Plotchart::DrawTimeMilestone { w text time {colour black}} {
variable data_series
variable scaling
#
# Draw the text first
#
set ytext [expr {$scaling($w,current)+0.5*$scaling($w,dy)}]
foreach {x y} [coordsToPixel $w $scaling($w,xmin) $ytext] {break}
$w create text 5 $y -text $text -anchor w \
-tags [list vertscroll above item_[expr {int($scaling($w,current))}]]
#
# Draw an upside-down triangle to indicate the time
#
set xcentre [clock scan $time]
set ytop $scaling($w,current)
set ybott [expr {$scaling($w,current)+0.8*$scaling($w,dy)}]
foreach {x1 y1} [coordsToPixel $w $xcentre $ybott] {break}
foreach {x2 y2} [coordsToPixel $w $xcentre $ytop] {break}
set x2 [expr {$x1-0.4*($y1-$y2)}]
set x3 [expr {$x1+0.4*($y1-$y2)}]
set y3 $y2
$w create polygon $x1 $y1 $x2 $y2 $x3 $y3 -fill $colour \
-tags [list $w vertscroll horizscroll below item_[expr {int($scaling($w,current))}]]
ReorderChartItems $w
set scaling($w,current) [expr {$scaling($w,current)-1.0}]
RescaleChart $w
}
# ScaleItems --
# Scale all items by a given factor
# Arguments:
# w Name of the canvas
# xcentre X-coordinate of centre
# ycentre Y-coordinate of centre
# factor The factor to scale them by
# Result:
# None
# Side effects:
# All items are scaled by the given factor and the
# world coordinates are adjusted.
#
proc ::Plotchart::ScaleItems { w xcentre ycentre factor } {
variable scaling
$w scale all $xcentre $ycentre $factor $factor
foreach {xc yc} [pixelToCoords $w $xcentre $ycentre] {break}
set rfact [expr {1.0/$factor}]
set scaling($w,xfactor) [expr {$scaling($w,xfactor)*$factor}]
set scaling($w,yfactor) [expr {$scaling($w,yfactor)*$factor}]
set scaling($w,xmin) [expr {(1.0-$rfact)*$xc+$rfact*$scaling($w,xmin)}]
set scaling($w,xmax) [expr {(1.0-$rfact)*$xc+$rfact*$scaling($w,xmax)}]
set scaling($w,ymin) [expr {(1.0-$rfact)*$yc+$rfact*$scaling($w,ymin)}]
set scaling($w,ymax) [expr {(1.0-$rfact)*$yc+$rfact*$scaling($w,ymax)}]
}
# MoveItems --
# Move all items by a given vector
# Arguments:
# w Name of the canvas
# xmove X-coordinate of move vector
# ymove Y-coordinate of move vector
# Result:
# None
# Side effects:
# All items are moved by the given vector and the
# world coordinates are adjusted.
#
proc ::Plotchart::MoveItems { w xmove ymove } {
variable scaling
$w move all $xmove $ymove
set dx [expr {$scaling($w,xfactor)*$xmove}]
set dy [expr {$scaling($w,yfactor)*$ymove}]
set scaling($w,xmin) [expr {$scaling($w,xmin)+$dx}]
set scaling($w,xmax) [expr {$scaling($w,xmax)+$dx}]
set scaling($w,ymin) [expr {$scaling($w,ymin)+$dy}]
set scaling($w,ymax) [expr {$scaling($w,ymax)+$dy}]
}
# DrawIsometricData --
# Draw the data in an isometric plot
# Arguments:
# w Name of the canvas
# type Type of data
# args Coordinates and so on
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawIsometricData { w type args } {
variable data_series
#
# What type of data?
#
if { $type == "rectangle" } {
foreach {x1 y1 x2 y2 colour} [concat $args "black"] {break}
foreach {px1 py1} [coordsToPixel $w $x1 $y1] {break}
foreach {px2 py2} [coordsToPixel $w $x2 $y2] {break}
$w create rectangle $px1 $py1 $px2 $py2 \
-outline $colour -tag [list $w data]
$w lower data
}
if { $type == "filled-rectangle" } {
foreach {x1 y1 x2 y2 colour} [concat $args "black"] {break}
foreach {px1 py1} [coordsToPixel $w $x1 $y1] {break}
foreach {px2 py2} [coordsToPixel $w $x2 $y2] {break}
$w create rectangle $px1 $py1 $px2 $py2 \
-outline $colour -fill $colour -tag [list $w data]
$w lower [list data && $w]
}
if { $type == "filled-circle" } {
foreach {x1 y1 rad colour} [concat $args "black"] {break}
set x2 [expr {$x1+$rad}]
set y2 [expr {$y1+$rad}]
set x1 [expr {$x1-$rad}]
set y1 [expr {$y1-$rad}]
foreach {px1 py1} [coordsToPixel $w $x1 $y1] {break}
foreach {px2 py2} [coordsToPixel $w $x2 $y2] {break}
$w create oval $px1 $py1 $px2 $py2 \
-outline $colour -fill $colour -tag [list $w data]
$w lower [list data && $w]
}
if { $type == "circle" } {
foreach {x1 y1 rad colour} [concat $args "black"] {break}
set x2 [expr {$x1+$rad}]
set y2 [expr {$y1+$rad}]
set x1 [expr {$x1-$rad}]
set y1 [expr {$y1-$rad}]
foreach {px1 py1} [coordsToPixel $w $x1 $y1] {break}
foreach {px2 py2} [coordsToPixel $w $x2 $y2] {break}
$w create oval $px1 $py1 $px2 $py2 \
-outline $colour -tag [list $w data]
$w lower [list data && $w]
}
}
# BackgroundColour --
# Set the background colour or other aspects of the background
# Arguments:
# w Name of the canvas
# part Which part: axes or plot
# colour Colour to use (or if part is "image", name of the image)
# dir Direction of increasing whiteness (optional, for "gradient"
# brightness Brighten (bright) or darken (dark) the colours
#
# Result:
# None
# Side effect:
# Colour of the relevant part is changed
#
proc ::Plotchart::BackgroundColour { w part colour {dir {}} {brighten bright}} {
if { $part == "axes" } {
$w configure -highlightthickness 0
$w itemconfigure mask -fill $colour -outline $colour
}
if { $part == "plot" } {
$w configure -highlightthickness 0
$w configure -background $colour
}
if { $part == "gradient" } {
if { $brighten == "dark" } {
set intensity black
} else {
set intensity white
}
DrawGradientBackground $w $colour $dir $intensity
}
if { $part == "image" } {
DrawImageBackground $w $colour
}
}
# DrawRadialSpokes --
# Draw the spokes of the radial chart
# Arguments:
# w Name of the canvas
# names Names of the spokes
# Result:
# None
# Side effects:
# Radial chart filled in
#
proc ::Plotchart::DrawRadialSpokes { w names } {
variable settings
variable scaling
set pxmin $scaling($w,pxmin)
set pymin $scaling($w,pymin)
set pxmax $scaling($w,pxmax)
set pymax $scaling($w,pymax)
$w create oval $pxmin $pymin $pxmax $pymax -outline black
set dangle [expr {2.0 * 3.1415926 / [llength $names]}]
set angle 0.0
set xcentr [expr {($pxmin+$pxmax)/2.0}]
set ycentr [expr {($pymin+$pymax)/2.0}]
foreach name $names {
set xtext [expr {$xcentr+cos($angle)*($pxmax-$pxmin+20)/2}]
set ytext [expr {$ycentr-sin($angle)*($pymax-$pymin+20)/2}]
set xspoke [expr {$xcentr+cos($angle)*($pxmax-$pxmin)/2}]
set yspoke [expr {$ycentr-sin($angle)*($pymax-$pymin)/2}]
if { cos($angle) >= 0.0 } {
set anchor w
} else {
set anchor e
}
if { abs($xspoke-$xcentr) < 2 } {
set xspoke $xcentr
}
if { abs($yspoke-$ycentr) < 2 } {
set yspoke $ycentr
}
$w create text $xtext $ytext -text $name -anchor $anchor
$w create line $xcentr $ycentr $xspoke $yspoke -fill black
set angle [expr {$angle+$dangle}]
}
}
# DrawRadial --
# Draw the data for the radial chart
# Arguments:
# w Name of the canvas
# values Values for each spoke
# colour Colour of the line
# thickness Thickness of the line (optional)
# Result:
# None
# Side effects:
# New line drawn
#
proc ::Plotchart::DrawRadial { w values colour {thickness 1} } {
variable data_series
variable settings
variable scaling
if { [llength $values] != $settings($w,number) } {
return -code error "Incorrect number of data given - should be $settings($w,number)"
}
set pxmin $scaling($w,pxmin)
set pymin $scaling($w,pymin)
set pxmax $scaling($w,pxmax)
set pymax $scaling($w,pymax)
set dangle [expr {2.0 * 3.1415926 / [llength $values]}]
set angle 0.0
set xcentr [expr {($pxmin+$pxmax)/2.0}]
set ycentr [expr {($pymin+$pymax)/2.0}]
set coords {}
if { ! [info exists data_series($w,base)] } {
set data_series($w,base) {}
foreach value $values {
lappend data_series($w,base) 0.0
}
}
set newbase {}
foreach value $values base $data_series($w,base) {
if { $settings($w,style) != "lines" } {
set value [expr {$value+$base}]
}
set factor [expr {$value/$settings($w,scale)}]
set xspoke [expr {$xcentr+$factor*cos($angle)*($pxmax-$pxmin)/2}]
set yspoke [expr {$ycentr-$factor*sin($angle)*($pymax-$pymin)/2}]
if { abs($xspoke-$xcentr) < 2 } {
set xspoke $xcentr
}
if { abs($yspoke-$ycentr) < 2 } {
set yspoke $ycentr
}
lappend coords $xspoke $yspoke
lappend newbase $value
set angle [expr {$angle+$dangle}]
}
set data_series($w,base) $newbase
if { $settings($w,style) == "filled" } {
set fillcolour $colour
} else {
set fillcolour ""
}
set id [$w create polygon $coords -outline $colour -width $thickness -fill $fillcolour -tags [list data $w]]
$w lower $id
}
# DrawTrendLine --
# Draw a trend line based on the given data in an XY-plot
# Arguments:
# w Name of the canvas
# series Data series
# xcrd Next x coordinate
# ycrd Next y coordinate
# Result:
# None
# Side effects:
# New/updated trend line drawn in canvas
#
proc ::Plotchart::DrawTrendLine { w series xcrd ycrd } {
variable data_series
variable scaling
#
# Check for missing values
#
if { $xcrd == "" || $ycrd == "" } {
return
}
#
# Compute the coefficients of the line
#
if { [info exists data_series($w,$series,xsum)] } {
set nsum [expr {$data_series($w,$series,nsum) + 1.0}]
set xsum [expr {$data_series($w,$series,xsum) + $xcrd}]
set x2sum [expr {$data_series($w,$series,x2sum) + $xcrd*$xcrd}]
set ysum [expr {$data_series($w,$series,ysum) + $ycrd}]
set xysum [expr {$data_series($w,$series,xysum) + $ycrd*$xcrd}]
} else {
set nsum [expr {1.0}]
set xsum [expr {$xcrd}]
set x2sum [expr {$xcrd*$xcrd}]
set ysum [expr {$ycrd}]
set xysum [expr {$ycrd*$xcrd}]
}
if { $nsum*$x2sum != $xsum*$xsum } {
set a [expr {($nsum*$xysum-$xsum*$ysum)/($nsum*$x2sum - $xsum*$xsum)}]
} else {
set a 0.0
}
set b [expr {($ysum-$a*$xsum)/$nsum}]
set xmin $scaling($w,xmin)
set xmax $scaling($w,xmax)
foreach {pxmin pymin} [coordsToPixel $w $xmin [expr {$a*$xmin+$b}]] {break}
foreach {pxmax pymax} [coordsToPixel $w $xmax [expr {$a*$xmax+$b}]] {break}
#
# Draw the actual line
#
set colour "black"
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
if { [info exists data_series($w,$series,trend)] } {
$w coords $data_series($w,$series,trend) $pxmin $pymin $pxmax $pymax
} else {
set data_series($w,$series,trend) \
[$w create line $pxmin $pymin $pxmax $pymax -fill $colour -tag [list data $w data_$series]]
}
$w lower [list data && $w]
set data_series($w,$series,nsum) $nsum
set data_series($w,$series,xsum) $xsum
set data_series($w,$series,x2sum) $x2sum
set data_series($w,$series,ysum) $ysum
set data_series($w,$series,xysum) $xysum
}
# VectorConfigure --
# Set configuration options for vectors
# Arguments:
# w Name of the canvas
# series Data series (identifier for vectors)
# args Pairs of configuration options:
# -scale|-colour|-centred|-type {cartesian|polar|nautical}
# Result:
# None
# Side effects:
# Configuration options are stored
#
proc ::Plotchart::VectorConfigure { w series args } {
variable data_series
variable scaling
foreach {option value} $args {
switch -- $option {
"-scale" {
if { $value > 0.0 } {
set scaling($w,$series,vectorscale) $value
} else {
return -code error "Scale factor must be positive"
}
}
"-colour" - "-color" {
set data_series($w,$series,vectorcolour) $value
}
"-centered" - "-centred" {
set data_series($w,$series,vectorcentred) $value
}
"-type" {
if { [lsearch {cartesian polar nautical} $value] >= 0 } {
set data_series($w,$series,vectortype) $value
} else {
return -code error "Unknown vector components option: $value"
}
}
default {
return -code error "Unknown vector option: $option ($value)"
}
}
}
}
# DrawVector --
# Draw a vector at the given coordinates with the given components
# Arguments:
# w Name of the canvas
# series Data series (identifier for the vectors)
# xcrd X coordinate of start or centre
# ycrd Y coordinate of start or centre
# ucmp X component or length
# vcmp Y component or angle
# Result:
# None
# Side effects:
# New arrow drawn in canvas
#
proc ::Plotchart::DrawVector { w series xcrd ycrd ucmp vcmp } {
variable data_series
variable scaling
#
# Check for missing values
#
if { $xcrd == "" || $ycrd == "" } {
return
}
#
# Check for missing values
#
if { $ucmp == "" || $vcmp == "" } {
return
}
#
# Get the options
#
set scalef 1.0
set colour black
set centred 0
set type cartesian
if { [info exists scaling($w,$series,vectorscale)] } {
set scalef $scaling($w,$series,vectorscale)
}
if { [info exists data_series($w,$series,vectorcolour)] } {
set colour $data_series($w,$series,vectorcolour)
}
if { [info exists data_series($w,$series,vectorcentred)] } {
set centred $data_series($w,$series,vectorcentred)
}
if { [info exists data_series($w,$series,vectortype)] } {
set type $data_series($w,$series,vectortype)
}
#
# Compute the coordinates of beginning and end of the arrow
#
switch -- $type {
"polar" {
set x1 [expr {$ucmp * cos( 3.1415926 * $vcmp / 180.0 ) }]
set y1 [expr {$ucmp * sin( 3.1415926 * $vcmp / 180.0 ) }]
set ucmp $x1
set vcmp $y1
}
"nautical" {
set x1 [expr {$ucmp * sin( 3.1415926 * $vcmp / 180.0 ) }]
set y1 [expr {$ucmp * cos( 3.1415926 * $vcmp / 180.0 ) }]
set ucmp $x1
set vcmp $y1
}
}
set u1 [expr {$scalef * $ucmp}]
set v1 [expr {$scalef * $vcmp}]
foreach {x1 y1} [coordsToPixel $w $xcrd $ycrd] {break}
if { $centred } {
set x1 [expr {$x1 - 0.5 * $u1}]
set y1 [expr {$y1 + 0.5 * $v1}]
}
set x2 [expr {$x1 + $u1}]
set y2 [expr {$y1 - $v1}]
#
# Draw the arrow
#
$w create line $x1 $y1 $x2 $y2 -fill $colour -tag [list data $w data_$series] -arrow last
$w lower data
}
# DotConfigure --
# Set configuration options for dots
# Arguments:
# w Name of the canvas
# series Data series (identifier for dots)
# args Pairs of configuration options:
# -radius|-colour|-classes {value colour ...}|-outline|-scalebyvalue|
# -scale
# Result:
# None
# Side effects:
# Configuration options are stored
#
proc ::Plotchart::DotConfigure { w series args } {
variable data_series
variable scaling
foreach {option value} $args {
switch -- $option {
"-scale" {
if { $value > 0.0 } {
set scaling($w,$series,dotscale) $value
} else {
return -code error "Scale factor must be positive"
}
}
"-colour" - "-color" {
set data_series($w,$series,dotcolour) $value
}
"-radius" {
set data_series($w,$series,dotradius) $value
}
"-scalebyvalue" {
set data_series($w,$series,dotscalebyvalue) $value
}
"-outline" {
set data_series($w,$series,dotoutline) $value
}
"-classes" {
set data_series($w,$series,dotclasses) $value
}
"-3deffect" {
set data_series($w,$series,dot3deffect) $value
}
default {
return -code error "Unknown dot option: $option ($value)"
}
}
}
}
# DrawDot --
# Draw a dot at the given coordinates, size and colour based on the given value
# Arguments:
# w Name of the canvas
# series Data series (identifier for the vectors)
# xcrd X coordinate of start or centre
# ycrd Y coordinate of start or centre
# value Value to be used
# Result:
# None
# Side effects:
# New oval drawn in canvas
#
proc ::Plotchart::DrawDot { w series xcrd ycrd value } {
variable data_series
variable scaling
#
# Check for missing values
#
if { $xcrd == "" || $ycrd == "" || $value == "" } {
return
}
#
# Get the options
#
set scalef 1.0
set colour black
set usevalue 1
set outline black
set radius 3
set classes {}
set use3deffect off
if { [info exists scaling($w,$series,dotscale)] } {
set scalef $scaling($w,$series,dotscale)
}
if { [info exists data_series($w,$series,dotcolour)] } {
set colour $data_series($w,$series,dotcolour)
}
if { [info exists data_series($w,$series,dotoutline)] } {
set outline {}
if { $data_series($w,$series,dotoutline) } {
set outline black
}
}
if { [info exists data_series($w,$series,dotradius)] } {
set radius $data_series($w,$series,dotradius)
}
if { [info exists data_series($w,$series,dotclasses)] } {
set classes $data_series($w,$series,dotclasses)
}
if { [info exists data_series($w,$series,dotscalebyvalue)] } {
set usevalue $data_series($w,$series,dotscalebyvalue)
}
if { [info exists data_series($w,$series,dot3deffect)] } {
set use3deffect $data_series($w,$series,dot3deffect)
}
#
# Compute the radius and the colour
#
if { $usevalue } {
set radius [expr {$scalef * $value}]
}
if { $classes != {} } {
foreach {limit col} $classes {
if { $value < $limit } {
set colour $col
break
}
}
}
foreach {x y} [coordsToPixel $w $xcrd $ycrd] {break}
set x1 [expr {$x - $radius}]
set y1 [expr {$y - $radius}]
set x2 [expr {$x + $radius}]
set y2 [expr {$y + $radius}]
#
# Draw the oval
#
$w create oval $x1 $y1 $x2 $y2 -fill $colour -tag [list data $w data_$series] -outline $outline
#
# 3D effect
#
if { $use3deffect } {
set xcentre [expr {$x - 0.6 * $radius}]
set ycentre [expr {$y - 0.6 * $radius}]
set factor 1.0
set newradius $radius
while { $newradius > 2 } {
set factor [expr {$factor * 0.8}]
set newradius [expr {$radius * $factor}]
set newcolour [BrightenColour $colour white [expr {1.0-$factor**2}]]
set newdot [$w create oval $x1 $y1 $x2 $y2 -fill $newcolour -outline {} \
-tag [list data $w data_$series]]
$w scale $newdot $xcentre $ycentre $factor $factor
}
}
$w lower [list data && $w]
}
# DrawLog*Dot, DrawPolarDot --
# Draw a dot at the given coordinates - variants for logarithmic axes and polar axis
# Arguments:
# w Name of the canvas
# series Data series (identifier for the vectors)
# xcrd X coordinate of start or centre
# ycrd Y coordinate of start or centre
# value Value to be used
# Result:
# None
# Side effects:
# New oval drawn in canvas
#
proc ::Plotchart::DrawLogXDot { w series xcrd ycrd value } {
DrawDot $w $series [expr {log10($xcrd)}] $ycrd $value
}
proc ::Plotchart::DrawLogYDot { w series xcrd ycrd value } {
DrawDot $w $series $xcrd [expr {log10($ycrd)}] $value
}
proc ::Plotchart::DrawLogXLogYDot { w series xcrd ycrd value } {
DrawDot $w $series [expr {log10($xcrd)}] [expr {log10($ycrd)}] $value
}
proc ::Plotchart::DrawPolarDot { w series rad phi value } {
variable torad
set xcrd [expr {$rad*cos($phi*$torad)}]
set ycrd [expr {$rad*sin($phi*$torad)}]
DrawDot $w $series $xcrd $ycrd $value
}
# DrawRchart --
# Draw data together with two horizontal lines representing the
# expected range
# Arguments:
# w Name of the canvas
# series Data series
# xcrd X coordinate of the data point
# ycrd Y coordinate of the data point
# Result:
# None
# Side effects:
# New data point drawn, lines updated
#
proc ::Plotchart::DrawRchart { w series xcrd ycrd } {
variable data_series
variable scaling
#
# Check for missing values
#
if { $xcrd == "" || $ycrd == "" } {
return
}
#
# In any case, draw the data point
#
DrawData $w $series $xcrd $ycrd
#
# Compute the expected range
#
if { ! [info exists data_series($w,$series,rchart)] } {
set data_series($w,$series,rchart) $ycrd
} else {
lappend data_series($w,$series,rchart) $ycrd
if { [llength $data_series($w,$series,rchart)] < 2 } {
return
}
set filtered $data_series($w,$series,rchart)
set outside 1
while { $outside } {
set data $filtered
foreach {ymin ymax} [RchartValues $data] {break}
set filtered {}
set outside 0
foreach y $data {
if { $y < $ymin || $y > $ymax } {
set outside 1
} else {
lappend filtered $y
}
}
}
#
# Draw the limit lines
#
if { [info exists data_series($w,$series,rchartlimits)] } {
eval $w delete $data_series($w,$series,rchartlimits)
}
set colour "black"
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
set xmin $scaling($w,xmin)
set xmax $scaling($w,xmax)
foreach {pxmin pymin} [coordsToPixel $w $xmin $ymin] {break}
foreach {pxmax pymax} [coordsToPixel $w $xmax $ymax] {break}
set data_series($w,$series,rchartlimits) [list \
[$w create line $pxmin $pymin $pxmax $pymin -fill $colour -tag [list data $w data_$series]] \
[$w create line $pxmin $pymax $pxmax $pymax -fill $colour -tag [list data $w data_$series]] \
]
}
}
# RchartValues --
# Compute the expected range for a series of data
# Arguments:
# data Data to be examined
# Result:
# Expected minimum and maximum
#
proc ::Plotchart::RchartValues { data } {
set sum 0.0
set sum2 0.0
set ndata [llength $data]
if { $ndata <= 1 } {
return [list $data $data]
}
foreach v $data {
set sum [expr {$sum + $v}]
set sum2 [expr {$sum2 + $v*$v}]
}
if { $ndata < 2 } {
return [list $v $v]
}
set variance [expr {($sum2 - $sum*$sum/double($ndata))/($ndata-1.0)}]
if { $variance < 0.0 } {
set variance 0.0
}
set vmean [expr {$sum/$ndata}]
set stdev [expr {sqrt($variance)}]
set vmin [expr {$vmean - 3.0 * $stdev}]
set vmax [expr {$vmean + 3.0 * $stdev}]
return [list $vmin $vmax]
}
# ReorderChartItems --
# Rearrange the drawing order of time and Gantt chart items
# Arguments:
# w Canvas widget containing them
# Result:
# None
#
proc ::Plotchart::ReorderChartItems { w } {
$w lower above
$w lower vertmask
$w lower tline
$w lower below
$w lower lowest
}
# RescaleChart --
# Reset the scaling of the scrollbar(s) for time and Gantt charts
# Arguments:
# w Canvas widget containing them
# Result:
# None
# Note:
# To be called after scaling($w,current) has been updated
# or a new time line has been added
#
proc ::Plotchart::RescaleChart { w } {
variable scaling
if { [info exists scaling($w,vscroll)] } {
if { $scaling($w,current) >= 0.0 } {
set scaling($w,theight) $scaling($w,ymax)
$scaling($w,vscroll) set 0.0 1.0
} else {
set scaling($w,theight) [expr {$scaling($w,ymax)-$scaling($w,current)}]
$scaling($w,vscroll) set $scaling($w,curpos) \
[expr {$scaling($w,curpos) + $scaling($w,ymax)/$scaling($w,theight)}]
}
}
if { [info exists scaling($w,hscroll)] } {
foreach {xmin dummy xmax} [$w bbox $w horizscroll] {break}
set scaling($w,twidth) [expr {$xmax-$xmin}]
if { $scaling($w,twidth) < $scaling($w,pxmax)-$scaling($w,pxmin) } {
$scaling($w,hscroll) set 0.0 1.0
} else {
$scaling($w,hscroll) set $scaling($w,curhpos) \
[expr {$scaling($w,curhpos) + \
($scaling($w,pxmax)-$scaling($w,pxmin)) \
/double($scaling($w,twidth))}]
}
}
}
# ConnectVertScrollbar --
# Connect a vertical scroll bar to the chart
# Arguments:
# w Canvas widget containing them
# scrollbar Scroll bar in question
# Result:
# None
#
proc ::Plotchart::ConnectVertScrollbar { w scrollbar } {
variable scaling
$scrollbar configure -command [list ::Plotchart::VertScrollChart $w]
bind $w <4> [list ::Plotchart::VertScrollChart $w scroll -1 units]
bind $w <5> [list ::Plotchart::VertScrollChart $w scroll 1 units]
bind $w <MouseWheel> [list ::Plotchart::VertScrollChart $w scroll %D wheel]
set scaling($w,vscroll) $scrollbar
RescaleChart $w
}
# ConnectHorizScrollbar --
# Connect a horizontal scroll bar to the chart
# Arguments:
# w Canvas widget containing them
# scrollbar Scroll bar in question
# Result:
# None
#
proc ::Plotchart::ConnectHorizScrollbar { w scrollbar } {
variable scaling
$scrollbar configure -command [list ::Plotchart::HorizScrollChart $w]
set scaling($w,hscroll) $scrollbar
RescaleChart $w
}
# VertScrollChart --
# Scroll a chart using the vertical scroll bar
# Arguments:
# w Canvas widget containing them
# operation Operation to respond to
# number Number representing the size of the displacement
# unit Unit of displacement
# Result:
# None
#
proc ::Plotchart::!VertScrollChart { w operation number {unit {}}} {
variable scaling
set pixheight [expr {$scaling($w,pymax)-$scaling($w,pymin)}]
set height [expr {$pixheight*$scaling($w,theight)/$scaling($w,ymax)}]
switch -- $operation {
"moveto" {
set dy [expr {$height*($scaling($w,curpos)-$number)}]
set scaling($w,curpos) $number
}
"scroll" {
if { $unit == "units" } {
set dy [expr {-$number*$height/$scaling($w,theight)}]
set newpos [expr {$scaling($w,curpos) + $number/$scaling($w,theight)}]
} else {
set dy [expr {-$number*$pixheight}]
set newpos [expr {$scaling($w,curpos) + $number*$scaling($w,ymax)/$scaling($w,theight)}]
}
# TODO: guard against scrolling too far
#if { $newpos < 0.0 } {
# set newpos 0.0
# set dy [expr {$...}]
#}
#
#if { $newpos > 1.0 } {
# set newpos 1.0
# set dy [expr {$...}]
#}
set scaling($w,curpos) $newpos
}
}
#
# TODO: limit the position between 0 and 1
#
$w move vertscroll 0 $dy
RescaleChart $w
}
proc ::Plotchart::VertScrollChart { w operation number {unit {}}} {
variable scaling
# Get the height of the scrolling region and the current position of the slider
set height [expr {$scaling($w,pymax)-$scaling($w,pymin)}]
foreach {ts bs} [$scaling($w,vscroll) get] {break}
if { $unit == "wheel" } {
set operation "scroll"
set unit "units"
set number [expr {$number>0? 1 : -1}]
}
switch -- $operation {
"moveto" {
# No scrolling if we are already at the top or bottom
if { $number < 0.0 } {
set number 0.0
}
if { $number+($bs-$ts) > 1.0 } {
set number [expr {1.0-($bs-$ts)}]
}
set dy [expr {$height*($scaling($w,curpos)-$number)/($bs-$ts)}]
set scaling($w,curpos) $number
$w move vertscroll 0 $dy
}
"scroll" {
# Handle "units" and "pages" the same
# No scrolling if we are at the top or bottom
if {$number == -1 && $ts == 0.0} {
return
}
if {$number == 1 && $bs == 1.0} {
return
}
# Scroll 1 unit in coordinate space, converted to pixel space
foreach {x1 y1} [coordsToPixel $w 0 0.0] {break}
foreach {x2 y2} [coordsToPixel $w 0 1.0] {break}
# This is the amount to scroll based on the current height
set amt [expr {$number*($y2-$y1)/$height}]
# Handle boundary conditions, don't want to scroll too far off
# the top or bottom.
if {$number == 1 && $bs-$amt > 1.0} {
set amt [expr {$bs-1.0}]
} elseif {$number == -1 && $ts-$amt < 0.0} {
set amt $ts
}
# Set the scrolling parameters and scroll
set dy [expr {$height*($scaling($w,curpos)-($ts-$amt))/($bs-$ts)}]
set scaling($w,curpos) [expr {$ts-$amt}]
$w move vertscroll 0 $dy
}
}
RescaleChart $w
}
# HorizScrollChart --
# Scroll a chart using the horizontal scroll bar
# Arguments:
# w Canvas widget containing them
# operation Operation to respond to
# number Number representing the size of the displacement
# unit Unit of displacement
# Result:
# None
#
proc ::Plotchart::HorizScrollChart { w operation number {unit {}}} {
variable scaling
# Get the width of the scrolling region and the current position of the slider
set width [expr {double($scaling($w,pxmax)-$scaling($w,pxmin))}]
foreach {ts bs} [$scaling($w,hscroll) get] {break}
switch -- $operation {
"moveto" {
# No scrolling if we are already at the top or bottom
if { $number < 0.0 } {
set number 0.0
}
if { $number+($bs-$ts) > 1.0 } {
set number [expr {1.0-($bs-$ts)}]
}
set dx [expr {$width*($scaling($w,curhpos)-$number)/($bs-$ts)}]
set scaling($w,curhpos) $number
$w move horizscroll $dx 0
}
"scroll" {
# Handle "units" and "pages" the same
# No scrolling if we are at the top or bottom
if {$number == -1 && $ts == 0.0} {
return
}
if {$number == 1 && $bs == 1.0} {
return
}
# Scroll 1 unit in coordinate space, converted to pixel space
set dx [expr {0.1*($scaling($w,xmax)-$scaling($w,xmin))}]
foreach {x1 y1} [coordsToPixel $w 0 0.0] {break}
foreach {x2 y2} [coordsToPixel $w $dx 0.0] {break}
# This is the amount to scroll based on the current width
set amt [expr {$number*($x2-$x1)/$width}]
# Handle boundary conditions, don't want to scroll too far off
# the left or the right
if {$number == 1 && $bs-$amt > 1.0} {
set amt [expr {$bs-1.0}]
} elseif {$number == -1 && $ts-$amt < 0.0} {
set amt $ts
}
# Set the scrolling parameters and scroll
set dx [expr {$width*($scaling($w,curhpos)-($ts-$amt))/($bs-$ts)}]
set scaling($w,curhpos) [expr {$ts-$amt}]
$w move horizscroll $dx 0
}
}
RescaleChart $w
}
# DrawWindRoseData --
# Draw the data for each sector
# Arguments:
# w Name of the canvas
# data List of "sectors" data
# colour Colour to use
# Result:
# None
# Side effects:
# Data added to the wind rose
#
proc ::Plotchart::DrawWindRoseData { w data colour } {
variable data_series
set start_angle $data_series($w,start_angle)
set increment $data_series($w,increment_angle)
set width_sector $data_series($w,d_angle)
set new_cumulative {}
foreach value $data cumulative_radius $data_series($w,cumulative_radius) {
set radius [expr {$value + $cumulative_radius}]
foreach {xright ytop} [polarToPixel $w [expr {$radius*sqrt(2.0)}] 45.0] {break}
foreach {xleft ybottom} [polarToPixel $w [expr {$radius*sqrt(2.0)}] 225.0] {break}
$w create arc $xleft $ytop $xright $ybottom -style pie -fill $colour \
-tag [list $w data_$data_series($w,count_data)] -start $start_angle -extent $width_sector
lappend new_cumulative $radius
set start_angle [expr {$start_angle - $increment}]
}
$w lower [list data_$data_series($w,count_data) && $w]
set data_series($w,cumulative_radius) $new_cumulative
incr data_series($w,count_data)
}
# DrawYband --
# Draw a vertical grey band in a plot
# Arguments:
# w Name of the canvas
# xmin Lower bound of the band
# xmax Upper bound of the band
# Result:
# None
# Side effects:
# Horizontal band drawn in canvas
#
proc ::Plotchart::DrawYband { w xmin xmax } {
variable scaling
foreach {xp1 yp1} [coordsToPixel $w $xmin $scaling($w,ymin)] {break}
foreach {xp2 yp2} [coordsToPixel $w $xmax $scaling($w,ymax)] {break}
$w create rectangle $xp1 $yp1 $xp2 $yp2 -fill grey70 -outline grey70 -tag [list band $w]
$w lower [list band && $w] ;# TODO: also in "plot" method
}
# DrawXband --
# Draw a horizontal grey band in a plot
# Arguments:
# w Name of the canvas
# ymin Lower bound of the band
# ymax Upper bound of the band
# Result:
# None
# Side effects:
# Horizontal band drawn in canvas
#
proc ::Plotchart::DrawXband { w ymin ymax } {
variable scaling
foreach {xp1 yp1} [coordsToPixel $w $scaling($w,xmin) $ymin] {break}
foreach {xp2 yp2} [coordsToPixel $w $scaling($w,xmax) $ymax] {break}
$w create rectangle $xp1 $yp1 $xp2 $yp2 -fill grey70 -outline grey70 -tag [list band $w]
$w lower [list band $w] ;# TODO: also in "plot" method
}
# DrawLabelDot --
# Draw a label and a symbol (dot) in a plot
# Arguments:
# w Name of the canvas
# x X coordinate of the dot
# y Y coordinate of the dot
# text Text to be shown
# orient (Optional) orientation of the text wrt the dot
# (w, e, n, s)
#
# Result:
# None
# Side effects:
# Label and dot drawn in canvas
# Note:
# The routine uses the data series name "labeldot" to derive
# the properties
#
proc ::Plotchart::DrawLabelDot { w x y text {orient w} } {
variable scaling
foreach {xp yp} [coordsToPixel $w $x $y] {break}
switch -- [string tolower $orient] {
"w" {
set xp [expr {$xp - 5}]
set anchor e
}
"e" {
set xp [expr {$xp + 10}]
set anchor w
}
"s" {
set yp [expr {$yp + 5}]
set anchor n
}
"n" {
set yp [expr {$yp - 5}]
set anchor s
}
default {
set xp [expr {$xp - 5}]
set anchor w
}
}
$w create text $xp $yp -text $text -fill grey -tag [list data $w] -anchor $anchor
DrawData $w labeldot $x $y
}
# DrawLabelDotPolar --
# Draw a label and a symbol (dot) in a polar plot
# Arguments:
# w Name of the canvas
# rad Radial coordinate of the dot
# angle Tangential coordinate of the dot
# text Text to be shown
# orient (Optional) orientation of the text wrt the dot
# (w, e, n, s)
#
# Result:
# None
# Side effects:
# Label and dot drawn in canvas
# Note:
# The routine uses the data series name "labeldot" to derive
# the properties
#
proc ::Plotchart::DrawLabelDotPolar { w rad angle text {orient w} } {
variable torad
set xcrd [expr {$rad*cos($angle*$torad)}]
set ycrd [expr {$rad*sin($angle*$torad)}]
DrawLabelDot $w $xcrd $ycrd $text $orient
}
# ConfigBar --
# Configuration options for vertical and horizontal barcharts
# Arguments:
# w Name of the canvas
# args List of arguments
# Result:
# None
# Side effects:
# Items that are already visible will NOT be changed to the new look
#
proc ::Plotchart::ConfigBar { w args } {
variable settings
foreach {option value} $args {
set option [string range $option 1 end]
if { [lsearch {showvalues valuefont valuecolour valuecolor valueformat} \
$option] >= 0} {
if { $option == "valuecolor" } {
set option "valuecolour"
}
set settings($w,$option) $value
} else {
return -code error "Unknown barchart option: -$option"
}
}
}
# DrawFunction --
# Draw a function f(x) in an XY-plot
# Arguments:
# w Name of the canvas
# series Data series (for the colour)
# xargs List of arguments to the (anonymous) function
# function Function expression
# args All parameters in the expression
# (and possibly the option -samples x)
# Result:
# None
# Side effects:
# New data drawn in canvas
#
# Note:
# This method requires Tcl 8.5
#
# TODO:
# Check for numerical problems!
#
proc ::Plotchart::DrawFunction { w series xargs function args } {
variable data_series
variable scaling
#
# Check the number of arguments
#
if { [llength $xargs] != [llength $args] + 1 &&
[llength $xargs] + 2 != [llength $args] + 1 } {
return -code error "plotfunc: number of (extra) arguments does not match the list of variables"
}
#
# Determine the number of samples
#
set number 50
if { [llength $xargs] + 2 == [llength $args] + 1 } {
if { [lindex $args end-1] != "-samples" } {
return -code error "plotfunc: unknown option - [lindex $args end-1]"
}
if { ! [string is integer [lindex $args end]] } {
return -code error "plotfunc: number of samples must be an integer - is instead \"[lindex $args end]\""
}
set number [lindex $args end]
set args [lrange $args 0 end-2]
}
#
# Get the caller's namespace
#
set namespace [uplevel 2 {namespace current}]
#
# The actual drawing
#
set colour black
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
set width 1
if { [info exists data_series($w,$series,-width)] } {
set width $data_series($w,$series,-width)
}
set xmin $scaling($w,xmin)
set dx [expr {($scaling($w,xmax) - $xmin) / ($number - 1.0)}]
set coords {}
set lambda [string map [list XARGS $xargs FUNCTION $function NS $namespace] {{XARGS} {expr {FUNCTION}} NS}]
for { set i 0 } { $i < $number } { incr i } {
set x [expr {$xmin + $dx*$i}]
if { [catch {
set y [apply $lambda $x {*}$args]
foreach {pxcrd pycrd} [coordsToPixel $w $x $y] {break}
lappend coords $pxcrd $pycrd
} msg] } {
if { [llength $coords] > 2 } {
$w create line $coords -fill $colour -smooth 1 -width $width -tag [list data $w data_$series]
set coords {}
}
}
}
if { [llength $coords] > 2 } {
$w create line $coords -fill $colour -smooth 1 -width $width -tag [list data $w data_$series]
}
$w lower [list data && $w]
}
# ClearPlot --
# Clear the current canvas and associated data
# in order to be able to draw another plot
# and re-using the same canvas
#
# Arguments:
# w Name of the canvas
#
# Results:
# None
#
# Side effects:
# all objects on the canvas will be deleted
# and all associated data removed
#
proc ::Plotchart::ClearPlot {w} {
variable data_series
variable scaling
foreach s [array names data_series "$w,*"] {
unset data_series($s)
}
foreach s [array names scaling "$w,*"] {
unset scaling($s)
}
#$w delete $w
}
# NewPlotInCanvas --
# Determine the name for the new plot
#
# Arguments:
# c Name of the canvas
#
# Results:
# Unique name for the plot
#
proc ::Plotchart::NewPlotInCanvas {c} {
variable scaling
if { ! [info exists scaling($c,plots)] } {
set scaling($c,plots) 0
} else {
incr scaling($c,plots)
}
return [format "%02d%s" $scaling($c,plots) $c]
}
# DrawDataList --
# Draw the data contained in two lists in an XY-plot
# Arguments:
# w Name of the canvas
# series Data series
# xlist List of x coordinates
# ylist List of y coordinates
# every Draw a symbol every N data
# Result:
# None
# Side effects:
# New data drawn in canvas
#
proc ::Plotchart::DrawDataList { w series xlist ylist {every {}} } {
variable data_series
variable scaling
if { $every == {} } {
set every [expr {int(sqrt([llength $xlist]))}]
if { [llength $xlist] < 10 } {
set every 1
}
}
#
# Determine the properties
#
set colour "black"
if { [info exists data_series($w,$series,-colour)] } {
set colour $data_series($w,$series,-colour)
}
set type "line"
if { [info exists data_series($w,$series,-type)] } {
set type $data_series($w,$series,-type)
}
set filled "no"
if { [info exists data_series($w,$series,-filled)] } {
set filled $data_series($w,$series,-filled)
}
set fillcolour white
if { [info exists data_series($w,$series,-fillcolour)] } {
set fillcolour $data_series($w,$series,-fillcolour)
}
set width 1
if { [info exists data_series($w,$series,-width)] } {
set width $data_series($w,$series,-width)
}
#
# Draw all data
# For the moment: no continuation!
#
if { [info exists data_series($w,$series,x)] } {
set xold $data_series($w,$series,x)
set yold $data_series($w,$series,y)
set pcoords [coordsToPixel $w $xold $yold]
} else {
set xold {}
set yold {}
set pcoords {}
}
foreach xcrd $xlist ycrd $ylist {
#
# Check for missing values
#
if { $xcrd == "" || $ycrd == "" } {
if { $pcoords != {} } {
if { $type == "line" || $type == "both" } {
$w create line $pcoords \
-fill $colour -width $width -tag [list data $w data_$series]
}
}
set pcoords {}
continue
} else {
foreach {pxcrd pycrd} [coordsToPixel $w $xcrd $ycrd] {break}
lappend pcoords $pxcrd $pycrd
}
}
set data_series($w,$series,x) $xcrd
set data_series($w,$series,y) $ycrd
if { $pcoords != {} } {
if { $type == "line" || $type == "both" } {
$w create line $pcoords \
-fill $colour -width $width -tag [list data $w data_$series]
}
}
if { $type == "symbol" || $type == "both" } {
set symbol "dot"
if { [info exists data_series($w,$series,-symbol)] } {
set symbol $data_series($w,$series,-symbol)
}
for {set i 0} {$i < [llength $xlist]} {incr i $every} {
set xcrd [lindex $xlist $i]
set ycrd [lindex $ylist $i]
if { $xcrd != {} && $ycrd != {} } {
foreach {pxcrd pycrd} [coordsToPixel $w $xcrd $ycrd] {break}
DrawSymbolPixel $w $series $pxcrd $pycrd $symbol $colour [list data $w data_$series]
}
}
}
$w lower [list data && $w]
}
# RenderText --
# Draw the specified text into a plot using special rendering tags
# Arguments:
# w Name of the canvas
# x canvas x coordinate
# y canvas y coordinate
# args the text to render and additional text formatting information as option value pairs
# Result:
# None
# Side effects:
# Text String drawn in canvas
#
proc ::Plotchart::RenderText { w x y args } {
variable render
set render(poshoriz) $x
set render(posvert) $y
set render(items) [list]
set render(superFont) {}
set render(subFont) {}
array set options {-font {} -text {} -fill {} -anchor c -tags {}}
# specified options:
array set options $args
# options to actually use:
array set newOptions $args
array unset newOptions -text
# use this -anchor for now, correct later:
set newOptions(-anchor) sw
# do the rendering:
foreach {text tag} $options(-text) {
lassign [RenderSpecs $tag $options(-font)] xp1 yp1 xp2 yp2 advance newFont
set newOptions(-font) $newFont
RenderTextDo $w $text $xp1 $yp1 $xp2 $yp2 $advance [array get newOptions]
}
# fix the -anchor for the whole string:
set bbox [$w bbox {*}$render(items)]
lassign $bbox bx1 by1 bx2 by2
lassign {0 0} dx dy
# dy:
switch $options(-anchor) {
n - nw - ne {
set dy [expr {$by2 - $by1}]
}
w - e - c {
set dy [expr {($by2 - $by1)/2.0}]
}
}
# dx:
switch $options(-anchor) {
c - n - s {
set dx [expr {($bx1-$bx2)/2.0}]
}
ne - e - se {
set dx [expr {$bx1-$bx2}]
}
}
foreach item $render(items) {$w move $item $dx $dy}
}
# renderSpecs --
# Read a render tag and determine the position of the
# associated text string
#
# Arguments:
# tag tag to get specifications for
# font font requested by the user
#
# Result:
# List of specs with relative positions, advancing information, and the font to use
#
proc ::Plotchart::RenderSpecs {tag font} {
variable render
set advance 1
set xp1 0 ;# how much to add to x coord before drawing
set yp1 0 ;# how much to add to y coord before drawing
set xp2 0 ;# how much to add to x coord afer drawing
set yp2 0 ;# how much to add to y coord after drawing
switch -- $tag {
"_" { # Subscript
if {$render(subFont) eq ""} {
set render(subFont) [font create {*}[font configure $font]]
set fontsize [font configure $font -size]
set fontsize [expr {round($fontsize * 3.0/5.0)}]
font configure $render(subFont) -size $fontsize
} else {
set fontsize [$render(subFont) configure -size]
}
set tmpFont $render(subFont)
set yp1 [expr {round($fontsize/3.0)}]
set yp2 [expr {-1 * $yp1}]
set xp1 [expr {round($fontsize/-5.0)}]
set xp2 [expr {round($fontsize/-5.0)}]
set advance 1
}
"^" { # Superscript
if {$render(subFont) eq ""} {
set render(superFont) [font create {*}[font configure $font]]
set fontsize [font configure $font -size]
set fontsize [expr {round($fontsize * 3.0/5.0)}]
font configure $render(superFont) -size $fontsize
} else {
set fontsize [$render(superFont) configure -size]
}
set tmpFont $render(superFont)
set yp1 [expr {round($fontsize/-1.5)}]
set yp2 [expr {-1 * $yp1}]
set xp1 [expr {round($fontsize/-5.0)}]
set xp2 [expr {round($fontsize/-5.0)}]
set advance 1
}
default {
set tmpFont $font
}
}
return [list $xp1 $yp1 $xp2 $yp2 $advance $tmpFont]
}
# doRender --
# Render the given string according to the additional
# rendering information
#
# Arguments:
# canvas Canvas in which to draw
# string text to be rendered
# xp1 X-offset relative to current position before drawing
# yp1 Y-offset relative to current position before drawing
# xp2 X-offset after drawing
# yp2 Y-offset after drawing
# advance whether we should advance to the next x position
# fontOptions list of pairs with formatting info for the font to use
#
# Result:
# None
#
# Side effect:
# The token is drawn on the canvas
#
proc ::Plotchart::RenderTextDo {canvas string xp1 yp1 xp2 yp2 advance fontOptions} {
variable render
# new coords where to start drawing text:
set xpos [expr {$render(poshoriz)+$xp1}]
set ypos [expr {$render(posvert)+$yp1}]
set item [$canvas create text $xpos $ypos -text $string {*}$fontOptions]
lappend render(items) $item
set bbox [$canvas bbox $item]
set width [expr {[lindex $bbox 2]-[lindex $bbox 0]}]
set xpos [expr {$xpos+$width+$xp2}]
set ypos [expr {$ypos+$yp2}]
if {$advance} {
set render(poshoriz) $xpos
set render(posvert) $ypos
}
}
# DeleteData --
# Delete the data elements and the associated resources
#
# Arguments:
# w Name of the canvas (actually the plot)
#
# Result:
# None
# Side effects:
# The data elements in the canvas are removed and the
# last known data points are removed from the resources.
# However, the rest (legend, options for data series) is not.
# This is deliberate: you may simply want to refresh the
# data.
#
proc ::Plotchart::DeleteData {w} {
variable data_series
variable scaling
foreach elem [array names data_series $w,*,x] {
unset -nocomplain data_series($elem)
}
$w delete data
}
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