Difference between revisions of "Module:Chart"

From blackwiki
Jump to navigation Jump to search
blackwiki>Ita140188
(better xtick alignment)
blackwiki>Ita140188
(reverting to previous version per talk page. I have no time to work on this further)
Line 14: Line 14:
 
     group = 'group',
 
     group = 'group',
 
     xlegend = 'x legends',
 
     xlegend = 'x legends',
 +
    yticks = 'y tick marks',
 
     tooltip = 'tooltip',
 
     tooltip = 'tooltip',
 
     accumulateTooltip = 'tooltip value accumulation',
 
     accumulateTooltip = 'tooltip value accumulation',
Line 23: Line 24:
 
     groupNames = 'group names',
 
     groupNames = 'group names',
 
     hideGroupLegends = 'hide group legends',
 
     hideGroupLegends = 'hide group legends',
    optint = 'only integer values',
 
 
     slices = 'slices',
 
     slices = 'slices',
 
     slice = 'slice',
 
     slice = 'slice',
Line 30: Line 30:
  
 
} -- here is what you want to translate
 
} -- here is what you want to translate
 
 
  
 
local defColors = require "Module:Plotter/DefaultColors"
 
local defColors = require "Module:Plotter/DefaultColors"
 
local hideGroupLegends
 
local hideGroupLegends
local optint
 
  
 
local function nulOrWhitespace( s )
 
local function nulOrWhitespace( s )
Line 59: Line 56:
 
     end
 
     end
 
end
 
end
 
  
 
function pieChart( frame )
 
function pieChart( frame )
Line 193: Line 189:
  
 
function barChart( frame )
 
function barChart( frame )
+
    local res = {}
local res = {}
 
 
     local args = frame.args -- can be changed to frame:getParent().args
 
     local args = frame.args -- can be changed to frame:getParent().args
     local values, xlegends, colors, tooltips, yscales, yscalesneg = {}, {}, {}, {} ,{}, {}, {}, {}
+
     local values, xlegends, colors, tooltips, yscales = {}, {}, {}, {} ,{}, {}, {}
 
     local groupNames, unitsSuffix, unitsPrefix, links = {}, {}, {}, {}
 
     local groupNames, unitsSuffix, unitsPrefix, links = {}, {}, {}, {}
     local width, height, stack, delimiter = 500, 350, false, args.delimiter or ':'
+
     local width, height, yticks, stack, delimiter = 500, 350, -1, false, args.delimiter or ':'
 
     local chartWidth, chartHeight, defcolor, scalePerGroup, accumulateTooltip
 
     local chartWidth, chartHeight, defcolor, scalePerGroup, accumulateTooltip
 +
  
 
     local numGroups, numValues
 
     local numGroups, numValues
 
     local scaleWidth
 
     local scaleWidth
 
table.insert( res, frame:extensionTag{ name = 'templatestyles', args = { src = 'TemplateStyles sandbox/Ita140188/styles.css'} })
 
 
function createGroupList( tab, legends, cols )
 
    if #legends > 1 and not hideGroupLegends then
 
        table.insert( tab, mw.text.tag( 'div', { style = string.format( "width:%spx;", chartWidth ) } ) )
 
        local list = {}
 
        local spanStyle = "padding:0 1em;background-color:%s;border:1px solid %s;margin-right:1em;-webkit-print-color-adjust:exact;"
 
        for gi = 1, #legends do
 
            local span = mw.text.tag( 'span', { style = string.format( spanStyle, cols[gi], cols[gi] ) }, ' ' ) .. ' '..  legends[gi]
 
            table.insert( list, mw.text.tag( 'li', {}, span ) )
 
        end
 
        table.insert( tab,
 
            mw.text.tag( 'ul',
 
                {style="width:100%;list-style:none;-webkit-column-width:12em;-moz-column-width:12em;column-width:12em;"},
 
                table.concat( list, '\n' )
 
            )
 
        )
 
        table.insert( tab, '</div>' )
 
    end
 
end
 
 
 
  
 
     function validate()
 
     function validate()
Line 249: Line 222:
 
         defcolor = defcolor or 'blue'
 
         defcolor = defcolor or 'blue'
 
         colors[1] = colors[1] or defcolor
 
         colors[1] = colors[1] or defcolor
         scaleWidth = scalePerGroup and 80 * numGroups or 30
+
         scaleWidth = scalePerGroup and 80 * numGroups or 100
 
         chartWidth = width -scaleWidth
 
         chartWidth = width -scaleWidth
 
         asGroups( 'unitsPrefix', unitsPrefix, true, true )
 
         asGroups( 'unitsPrefix', unitsPrefix, true, true )
Line 288: Line 261:
 
                 end
 
                 end
 
             elseif k == keywords.stack then stack = true
 
             elseif k == keywords.stack then stack = true
             elseif k == keywords.optint then optint = true
+
             elseif k == keywords.yticks then yticks = tonumber(v) or -1
 
             elseif k == keywords.scalePerGroup then scalePerGroup = true
 
             elseif k == keywords.scalePerGroup then scalePerGroup = true
 
             elseif k == keywords.defcolor then defcolor = v
 
             elseif k == keywords.defcolor then defcolor = v
Line 326: Line 299:
 
             end
 
             end
 
             local sum = math.max( unpack( sums ) )
 
             local sum = math.max( unpack( sums ) )
            local sumneg = math.min( unpack( sums ) )
+
             for i = 1, #values do yscales[i] = sum end
             for i = 1, #values do  
 
            yscales[i] = sum  
 
            yscalesneg[i] = 0 -- -sumneg
 
            end
 
 
         else
 
         else
             for i, group in ipairs( values ) do  
+
             for i, group in ipairs( values ) do yscales[i] = math.max( unpack( group ) ) end
            yscales[i] = math.max( unpack( group ) )  
 
            yscalesneg[i] = -math.min( unpack( group ) )
 
            end
 
 
         end
 
         end
 
         for i, scale in ipairs( yscales ) do yscales[i] = roundup( scale * 0.9999 ) end
 
         for i, scale in ipairs( yscales ) do yscales[i] = roundup( scale * 0.9999 ) end
        for i, scale in ipairs( yscalesneg ) do yscalesneg[i] = roundup( scale * 0.9999 ) end
+
         if not scalePerGroup then for i = 1, #values do yscales[i] = math.max( unpack( yscales ) ) end end
         if not scalePerGroup then for i = 1, #values do  
 
        yscales[i] = math.max( unpack( yscales ) )  
 
        yscalesneg[i] = math.max ( 0 , math.max( unpack( yscalesneg ) ) )
 
        end end
 
 
     end
 
     end
  
Line 354: Line 316:
  
 
     function calcHeights( gi, i, val )
 
     function calcHeights( gi, i, val )
    local barHeight = 0
 
    local top, base = 0, 0
 
    if  tonumber( val ) >= 0 then
 
        barHeight = math.floor( val / ( yscales[gi] + yscalesneg[gi] ) * chartHeight + 0.5 ) -- add half to make it "round" instead of "trunc"
 
        top, base = chartHeight - barHeight - yscalesneg[gi] / ( yscales[gi] + yscalesneg[gi] ) * chartHeight , 0
 
        -- barHeight = math.floor( val / yscales[gi] * chartHeight + 0.5 ) -- add half to make it "round" instead of "trunc"
 
        -- top, base = chartHeight - barHeight, 0
 
        else
 
        barHeight = math.floor( -val / ( yscales[gi] + yscalesneg[gi] ) * chartHeight + 0.5 ) -- add half to make it "round" instead of "trunc"
 
        top, base = chartHeight - yscales[gi] / ( yscales[gi] + yscalesneg[gi] ) * chartHeight, 0
 
    end
 
        if stack then
 
            local rawbase = 0
 
            for j = 1, gi - 1 do rawbase = rawbase + values[j][i] end -- sum the "i" value of all the groups below our group, gi.
 
            base = math.floor( chartHeight * rawbase / yscales[gi] ) -- normally, and especially if it's "stack", all the yscales must be equal.
 
        end
 
        return barHeight, top - base
 
    end
 
   
 
    function calcHeightsOld( gi, i, val )
 
 
         local barHeight = math.floor( val / yscales[gi] * chartHeight + 0.5 ) -- add half to make it "round" instead of "trunc"
 
         local barHeight = math.floor( val / yscales[gi] * chartHeight + 0.5 ) -- add half to make it "round" instead of "trunc"
 
         local top, base = chartHeight - barHeight, 0
 
         local top, base = chartHeight - barHeight, 0
Line 385: Line 327:
  
 
     function groupBounds( i )
 
     function groupBounds( i )
         local setWidth = ( chartWidth / numValues )
+
         local setWidth = math.floor( chartWidth / numValues )
        -- local setOffset = ( i - 1 ) * setWidth
 
 
         local setOffset = ( i - 1 ) * setWidth
 
         local setOffset = ( i - 1 ) * setWidth
 
         return setOffset, setWidth
 
         return setOffset, setWidth
Line 394: Line 335:
 
         local setOffset, setWidth = groupBounds( i )
 
         local setOffset, setWidth = groupBounds( i )
 
         if stack or numGroups == 1 then
 
         if stack or numGroups == 1 then
             local barWidth = math.min( 38, ( 0.8 * setWidth ) )
+
             local barWidth = math.min( 38, math.floor( 0.8 * setWidth ) )
 
             return setOffset + (setWidth - barWidth) / 2, barWidth
 
             return setOffset + (setWidth - barWidth) / 2, barWidth
 
         end
 
         end
 
         setWidth = 0.85 * setWidth
 
         setWidth = 0.85 * setWidth
         local barWidth = ( 0.75 * setWidth / numGroups )
+
         local barWidth = math.floor( 0.75 * setWidth / numGroups )
         local left = setOffset + ( ( gi - 1 ) / numGroups * setWidth )
+
         local left = setOffset + math.floor( ( gi - 1 ) / numGroups * setWidth )
 
         return left, barWidth
 
         return left, barWidth
 
     end
 
     end
Line 415: Line 356:
 
         local link = links[gi] and links[gi][i] or ''
 
         local link = links[gi] and links[gi][i] or ''
 
         local img = not nulOrWhitespace( link ) and mw.ustring.format( '[[File:Transparent.png|1000px|link=%s|%s]]', link, custom and tooltip or '' ) or ''
 
         local img = not nulOrWhitespace( link ) and mw.ustring.format( '[[File:Transparent.png|1000px|link=%s|%s]]', link, custom and tooltip or '' ) or ''
         table.insert( res, mw.text.tag( 'div', { style = style, title = tooltip, class = "chart2-bar" }, img ) )
+
         table.insert( res, mw.text.tag( 'div', { style = style, title = tooltip, }, img ) )
 
     end
 
     end
 
 
 
  
  
 
     function drawYScale()
 
     function drawYScale()
   
+
         function drawSingle( gi, color, width, yticks, single )
         function drawSingle( gi, color, single )
 
 
             local yscale = yscales[gi]
 
             local yscale = yscales[gi]
 
             local _, top, ordermag = roundup( yscale * 0.999 )
 
             local _, top, ordermag = roundup( yscale * 0.999 )
             local numnotches = top <= 1.5 and top * 4
+
             local numnotches = yticks >= 0 and yticks or
                    or top < 4  and top * 2
+
            (top <= 1.5 and top * 4
                     or top
+
            or top < 4  and top * 2
             local valStyleStrCntnr = 'display:block;position:relative;height:%spx;text-align:right;margin:0px;' -- SINGLE ELEMENT OF Y AXIS
+
                     or top)
            local valStyleStrValue = 'display:block;position:relative;float:right;height:%spx;text-align:right;margin:%spx 0px 0px 0px;vertical-align:middle;line-height:%spx;' -- value
+
             local valStyleStr =
            local valStyleStrNotch = 'display:block;position:relative;float:right;height:%spx;text-align:right;width:5px; border-top:1px solid black' -- notch
+
                single and 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;padding:0 2px'
                 -- or 'position:relative;height=20px;text-align:right;vertical-align:middle;max-width:%spx;top:%spx;left:3px;background-color:%s;color:white;font-weight:bold;text-shadow:-1px -1px 0 #000,1px -1px 0 #000,-1px 1px 0 #000,1px 1px 0 #000;padding:0 2px'
+
                 or 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;left:3px;background-color:%s;color:white;font-weight:bold;text-shadow:-1px -1px 0 #000,1px -1px 0 #000,-1px 1px 0 #000,1px 1px 0 #000;padding:0 2px'
             -- local notchStyleStr = 'position:absolute;height=1px;min-width:5px;top:%spx;left:%spx;border:1px solid %s;'
+
             local notchStyleStr = 'position:absolute;height=1px;min-width:5px;top:%spx;left:%spx;border:1px solid %s;'
 
             for i = 1, numnotches do
 
             for i = 1, numnotches do
                 local val = (numnotches - i + 1) / numnotches * yscale -- value of this notch
+
                 local val = i / numnotches * yscale
               
+
                 local y = chartHeight - calcHeights( gi, 1, val )
                 local y = ( 1 / numnotches * chartHeight )  --chartHeight - calcHeights( gi, 1, val ) -- height of a single notch
+
                 local div = mw.text.tag( 'div', { style = string.format( valStyleStr, width - 10, y - 10, color ) }, mw.getContentLanguage():formatNum( tonumber( val ) or 0 ) )
                 local divCntnr = mw.text.tag( 'div', { style = string.format( valStyleStrCntnr, y, color ) } )
+
                 table.insert( res, div )
                local divValue = mw.text.tag( 'div', { style = string.format( valStyleStrValue, y, -y/2, y, color ) }, mw.getContentLanguage():formatNum( tonumber( val ) or 0 ) )
+
                 div = mw.text.tag( 'div', { style = string.format( notchStyleStr, y, width - 4, color ) }, '' )
                local divNotch = mw.text.tag( 'div', { style = string.format( valStyleStrNotch, y, color ) }, '&nbsp;' )
+
                 table.insert( res, div )
                table.insert( res, divCntnr )
 
            if val~=math.floor(val) and optint then
 
               
 
                else
 
                table.insert( res, divNotch )
 
                table.insert( res, divValue )
 
            end
 
                 table.insert( res, '</div>' )
 
                 table.insert( res, '<div style="clear:right;display:block"></div>' )
 
             
 
               
 
                -- div = mw.text.tag( 'div', { style = string.format( notchStyleStr, y, width - 4, color ) }, '' )
 
                 -- table.insert( res, div )
 
 
             end
 
             end
 
         end
 
         end
  
 
         if scalePerGroup then
 
         if scalePerGroup then
             -- local colWidth = 80
+
             local colWidth = 80
             -- local colStyle = "position:absolute;height:%spx;min-width:%spx;left:%spx;border-right:1px solid %s;color:%s"
+
             local colStyle = "position:absolute;height:%spx;min-width:%spx;left:%spx;border-right:1px solid %s;color:%s"
              
+
             for gi = 1, numGroups do
           
+
                local left = ( gi - 1 ) * colWidth
            -- local colStyle = "height:%spx;border-right:1px solid %s;color:%s;display:inline-block;text-align:right"
+
                local color = colors[gi] or defcolor
            -- for gi = 1, numGroups do
+
                table.insert( res, mw.text.tag( 'div', { style = string.format( colStyle, chartHeight, colWidth, left, color, color ) } ) )
            --    -- local left = ( gi - 1 ) * colWidth
+
                drawSingle( gi, color, colWidth, yticks )
            --    local color = colors[gi] or defcolor
+
                table.insert( res, '</div>' )
            --    -- table.insert( res, mw.text.tag( 'div', { style = string.format( colStyle, chartHeight, colWidth, left, color, color ) } ) )
+
             end
            --    table.insert( res, mw.text.tag( 'div', { style = string.format( colStyle, chartHeight, color, color ) } ) )
 
            --    drawSingle( gi, color )
 
            --    table.insert( res, '</div>' )
 
             -- end
 
 
         else
 
         else
             drawSingle( 1, 'black', true ) -- gi is the id of y axis when more than 1
+
             drawSingle( 1, 'black', scaleWidth, yticks, true )
 
         end
 
         end
 
     end
 
     end
 
 
 
  
 
     function drawXlegends()
 
     function drawXlegends()
 
         local setOffset, setWidth
 
         local setOffset, setWidth
         local legendDivStyleFormat = "display:block;float:left;position:relative;vertical-align:top;width:%spx;text-align:center;margin:0px 0px 0px %spx;"
+
         local legendDivStyleFormat = "position:absolute;left:%spx;top:10px;min-width:%spx;max-width:%spx;text-align:center;vertical-align:top;"
         --local tickDivstyleFormat = "display:block;float:left;position:relative;vertical-align:top;border-left:1px solid black;width:%spx;text-align:center;margin:0px 0px 0px %spx;"
+
         local tickDivstyleFormat = "position:absolute;left:%spx;height:10px;width:1px;border-left:1px solid black;"
        local offsetleft = 0;
 
        setOffset, setWidth = groupBounds( 1 )
 
 
         for i = 1, numValues do
 
         for i = 1, numValues do
 
             if not nulOrWhitespace( xlegends[i] ) then
 
             if not nulOrWhitespace( xlegends[i] ) then
            --table.insert( res, mw.text.tag( 'div', { style = string.format( tickDivStyleFormat, setWidth/2, offsetleft+setWidth/2 ) }, xlegends[i] or '' ) )
+
                setOffset, setWidth = groupBounds( i )
                 table.insert( res, mw.text.tag( 'div', { style = string.format( legendDivStyleFormat, setWidth, offsetleft ) }, xlegends[i] or '' ) )
+
                -- setWidth = 0.85 * setWidth
                offsetleft=0;
+
                table.insert( res, mw.text.tag( 'div', { style = string.format( legendDivStyleFormat, setOffset + 5, setWidth - 10, setWidth - 10 ) }, xlegends[i] or '' ) )
            else
+
                 table.insert( res, mw.text.tag( 'div', { style = string.format( tickDivstyleFormat, setOffset + setWidth / 2 ) }, '' ) )
            offsetleft=offsetleft+setWidth;
 
 
             end
 
             end
           
 
                -- setOffset, setWidth = groupBounds( i )
 
                -- table.insert( res, mw.text.tag( 'div', { style = string.format( legendDivStyleFormat, setWidth ) }, xlegends[i] or '' ) )
 
           
 
 
         end
 
         end
 
     end
 
     end
  
function drawXticks()
+
    function drawChart()
         local setOffset, setWidth
+
         table.insert( res, mw.text.tag( 'div', { class = 'chart noresize', style = string.format( 'margin-top:1em;max-width:%spx;', width ) } ) )
        local tickDivStyleFormat = "display:block;float:left;position:relative;height:5px;vertical-align:top;border-left:1px solid black;width:%spx;text-align:center;margin:0px 0px 0px %spx;"
+
         table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;min-height:%spx;min-width:%spx;max-width:%spx;", height, width, width ) } ) )
        local offsetleft = 0;
 
        setOffset, setWidth = groupBounds( 1 )
 
         for i = 1, numValues do
 
            if not nulOrWhitespace( xlegends[i] ) then
 
            table.insert( res, mw.text.tag( 'div', { style = string.format( tickDivStyleFormat, (setWidth/2)-1, (offsetleft+setWidth/2) ) }, '' ) )
 
                offsetleft=0;
 
            else
 
            offsetleft=offsetleft+setWidth;
 
            end
 
        end
 
    end
 
  
 
+
         table.insert( res, mw.text.tag( 'div', { style = string.format("float:right;position:relative;min-height:%spx;min-width:%spx;max-width:%spx;border-left:1px black solid;border-bottom:1px black solid;", chartHeight, chartWidth, chartWidth ) } ) )
    function drawChart()
 
         table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;padding:1em 0em 1em 0em;") } ) ) -- container div
 
        table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;white-space:nowrap;" ) } ) ) -- container div
 
table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;height:%spx;display:inline-block;text-align:right;vertical-align:top;", chartHeight ) } ) )
 
        drawYScale()
 
        table.insert( res, '</div><div style="position:relative;display:inline-block">' )
 
        -- table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;display:inline-block" ) } ) ) -- right side container div (should not have space)
 
        table.insert( res, mw.text.tag( 'div', { style = string.format("height:%spx;width:%spx;border-left:1px black solid;border-bottom:1px black solid;display:block;margin:0px;padding:0px;", chartHeight, chartWidth ) } ) ) -- the actual chart
 
 
         local acum = stack and accumulateTooltip and {}
 
         local acum = stack and accumulateTooltip and {}
 
         for gi, group in pairs( values ) do
 
         for gi, group in pairs( values ) do
Line 533: Line 424:
 
         end
 
         end
 
         table.insert( res, '</div>' )
 
         table.insert( res, '</div>' )
         table.insert( res, mw.text.tag( 'div', { style = string.format( "position:relative;width:%spx;float:left;", chartWidth ) } ) ) -- X ticks
+
         table.insert( res, mw.text.tag( 'div', { style = string.format("position:absolute;height:%spx;min-width:%spx;max-width:%spx;", chartHeight, scaleWidth, scaleWidth, scaleWidth ) } ) )
         drawXticks()
+
         drawYScale()
 
         table.insert( res, '</div>' )
 
         table.insert( res, '</div>' )
         table.insert( res, mw.text.tag( 'div', { style = string.format( "position:relative;width:%spx;", chartWidth ) } ) ) -- X legends
+
         table.insert( res, mw.text.tag( 'div', { style = string.format( "position:absolute;top:%spx;left:%spx;width:%spx;", chartHeight, scaleWidth, chartWidth ) } ) )
 
         drawXlegends()
 
         drawXlegends()
        table.insert( res, '</div>' )
 
 
         table.insert( res, '</div>' )
 
         table.insert( res, '</div>' )
 
         table.insert( res, '</div>' )
 
         table.insert( res, '</div>' )

Revision as of 01:59, 20 February 2020

Module Chart exports two functions: bar chart and pie chart

Note - Template:Graph:Chart is an alternative template, that may be more suitable for your use case.

Drawing Bar charts: "bar chart"

Parameters

parameter name what it does
delimiter string to delimit multiple values when given. default to colon ( : ). normally you do not want to touch this, it's provided for the off-chance you'll want to use colon as part of one of the parameters.
width number. if provided, must be at least 200. default: 500
height number. if provided, must be at least 200. default: 350
group n (where "n" is a number. use "group 1", "group 2" etc. for as many groups as there are in the graph) the values to be charted. see below.
tooltip n tooltip to be associated with specific bar. If no tooltip for a specific bar is defined, and this bar has a link, then this link will be used as tooltip. Otherwise, the tooltip will be combined from the group name and the value, optionally with "units prefix" and "units suffix".
links n links to articles to be associated with specific bar
stack whether to stack the different groups on top of each other. do not specify to show bars side by side. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
tooltip value accumulation useful only with stack: when set to true, tooltip will show accumulated value of all blocks up to current one
colors the colors used to denote the various groups. should have exactly as many values as # of groups. can be given as standard html-recognized color names, or using #xxx or #xxxxxx notation.
x legends The legends for the X values. Wikicode, such as internal links or templates can be used.
hide group legends if set to true, group legends will not be shown below chart. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
scale per group set to use separate Y- scale for each group. leave empty to use one scale for all groups. incompatible with "stack". Note that even if some of the scales are exactly the same, they will be drawn separately when this setting is on. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
units prefix used in tooltip. e.g., $, so values will show as "$500" instead of "500" in the tooltip
units suffix ditto for units suffix. use, e.g. "Kg" so values will show as 88Kg instead of 88 in tooltip. underscore ("_") are replaced by spaces, to allow a space between the value and the suffix.
group names names of different groups
y tick marks number of tick marks on the y axis. if the value is negative or omitted, the module will attempt to automatically calculate a sensible number of tick marks.

Examples

Basic

{{ #invoke:Chart | bar chart
| group 1 = 40 : 50 : 60 : 20
| group 2 = 20 : 60 : 12 : 44
| group 3 = 55 : 14 : 33 : 5
| links 1 = Apple : McCintosh : Golden delicious
| links 2 = Banana : Apricot : Peach
| links 3 = Orange : Pear : Bear
| tooltip 2 = tooltip 1 : tooltip 2 : tooltip 3 : tooltip 4
| colors = green : yellow : orange
| group names = Apple : Banana : Orange
| x legends = Before : During : After : Post mortem
}}



Stacked

Here is the same graph, with more modest height and width, using "stack", and adding "units suffix" for good measure:

{{ #invoke:Chart | bar chart
| height = 250
| width = 300
| stack = 1
| group 1 = 40 : 50 : 60 : 20
| group 2 = 20 : 60 : 12 : 44
| group 3 = 55 : 14 : 33 : 5
| colors = green : yellow : orange
| group names = Apple : Banana : Orange
| units suffix = Kg
| x legends = Before : During : After : Post mortem
}}
25
50
75
100
125
150
Before
During
After
Post mortem
  •   Apple
  •   Banana
  •   Orange


Scale per group

This option has been disabled. It was rarely used and broke in the last code update. Here is an example with large number of groups - mainly to test how it looks with large number of legends:

{{ #invoke:Chart | bar chart
| width = 800
| height = 550
| group 1 = 1:2:3:4:5:4:3:2:1
| group 2 = 1:2:3:4:5:4:3:2:1
| group 3 = 1:2:3:4:5:4:3:2:1
| group 4 = 1:2:3:4:5:4:3:2:1
| group 5 = 1:2:3:4:5:4:3:2:1
| group 6 = 1:2:3:4:5:4:3:2:1
| group 7 = 1:2:3:4:5:4:3:2:1
| group 8 = 1:2:3:4:5:4:3:2:1
| group 9 = 1:2:3:4:5:4:3:2:1
| group 10 = 1:2:3:4:5:4:3:2:1
| group 11 = 1:2:3:4:5:4:3:2:1
| group 12 = 1:2:3:4:5:4:3:2:1
| group 13 = 1:2:3:4:5:4:3:2:1
| group 14 = 1:2:3:4:5:4:3:2:1
| group 15 = 1:2:3:4:5:4:3:2:1
| group 16 = 1:2:3:4:5:4:3:2:1
| group 17 = 1:2:3:4:5:4:3:2:1
| group 18 = 1:2:3:4:5:4:3:2:1
| group 19 = 1:2:3:4:5:4:3:2:1
| group 20 = 1:2:3:4:5:4:3:2:1
| group 21 = 1:2:3:4:5:4:3:2:1
| colors = Silver:Gray:Black:Red:Maroon:Yellow:Olive:Lime:Green:Aqua:Teal:Blue:Navy:Fuchsia:Purple:ForestGreen:Tomato:LightSeaGreen:RosyBrown:DarkOliveGreen:MediumVioletRed
| group names = Alabama:Alaska:Arizona:Arkansas:California:Colorado:Connecticut:Delaware:Florida:Georgia:Hawaii:Idaho:Illinois:Indiana:Iowa:Kansas:Kentucky:Louisiana:Maine:Maryland:Massachusetts
| x legends = 1920 : 1930 : 1940: 1950 : 1960 : 1970 : 1990 : 2000 : 2010
| units prefix = $
| units suffix = _billion
| stack = 1
}}
25
50
75
100
125
150
1920
1930
1940
1950
1960
1970
1990
2000
2010
  •   Alabama
  •   Alaska
  •   Arizona
  •   Arkansas
  •   California
  •   Colorado
  •   Connecticut
  •   Delaware
  •   Florida
  •   Georgia
  •   Hawaii
  •   Idaho
  •   Illinois
  •   Indiana
  •   Iowa
  •   Kansas
  •   Kentucky
  •   Louisiana
  •   Maine
  •   Maryland
  •   Massachusetts


If there are many values, x legends can be diluted by using delimiters with nothing in between:

{{ #invoke:Chart | bar chart
| group 1 = 1:2:3:4:5:6:7:8:9:10:11:12:13:14:15:16:17:18:19:20:21:22:23:24:25:26:27:28:29:30
:31:32:33:34:35:36:37:38:39:40:41:42:43:44:45:46:47:48:49:50:51:52:53:54:55:56:57:58:59
| units suffix = _Things
| group names = Some
| x legends = ::::1940::::::::::1950::::::::::1960::::::::::1970::::::::::1980::::::::::1990::::
}}
10
20
30
40
50
60
1940
1950
1960
1970
1980
1990

Drawing Pie charts: "pie chart"

Parameters

parameter name what it does
delimiter string to delimit multiple values when given. default to colon ( : ). normally you do not want to touch this, it's provided for the off-chance you'll want to use colon as part of one of the parameters.
radius number. The radius of the pie in pixels
slices Tuples, in parenthesis. Use delimiter inside the tuple:
( Value1 : Name1 : Color1 : Link1  ) ( Value2 : Name2 : Color2 : Link2 ) ...

The values are numbers. The numbers can be integers or decimal fractions, or using the scientific notation: 7.24e6, 7,240,000, or 7240000.00 are all acceptable for 7 Million and 240 thousands.

Names are strings. Colors are optional. you can use any Web colors, such as "red" or "#FF0000". Up to 26 default colors are defined, but if your pie has more than 26 slices, you must define the colors of slice #27 and up. Links can be external or internal links, including linking to internal anchors and paragraphs in the same article, like so: [[Article|Tooltip]] for internal link, [[#Paragraph name|Tooltip]] for linking to an anchor in same article, or [http://example.org Tooltip] for external link.

slice n alternative syntax to "slices". n is the slice number, beginning with 1. make sure not to skip: if you define "slice 1", "slice 2", "slice 4", "slice 5"..., skipping slice 3, only the first two slices will be shown. this syntax is incompatible with "slices", i.e., they should not be used in conjunction in the same invocation. Using both "slices" and "slice n" in the same invocation will cause unpredictable results. The value is like a single "tuple" as explained above, but without the parenthesis:
 | slice 1 = Value1 : Name1 : Color1 : Link1
 | slice 2 = Value2 : Name2 : Color2 : Link2
 | ...

This syntax allows you to use parenthesis in names, links, and colors.

percent if used, the percentage of each slice will be calculated and added to the legend: so if you have two slices, like so: ( 1 : Younglings ) ( 3 : elders ), and use define "percent", the legends will become "Younglings: 1 (25%)" and "Elders: 3 (75%)", instead of simply "Younglings: 1" and "Elders: 3". Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.
units prefix used in the legend. e.g., defining "units prefix=$", values will show as "$500" instead of "500" in the legends
units suffix ditto for units suffix. use, e.g. "Kg" so values will show as 88Kg instead of 88 in legend. underscore ("_") are replaced by spaces, to allow a space between the value and the suffix.
hide group legends Setting to true prevents displaying of the group legends under the chart. Any non-empty value means "yes". To say "no", simply do not supply this parameter at all, or leave the value blank.

Examples

Error: Image is invalid or non-existent.

  •   Apples: 1,000,000 Tonne (17.2%)
  •   Bananas: 2,000,000 Tonne (34.3%)
  •   Apricots: 1,440,000 Tonne (24.7%)
  •   Pears: 640,000 Tonne (11.0%)
  •   Pineapples: 750,000 Tonne (12.9%)


Error: Image is invalid or non-existent.

  •   Apples: 1,000,000 Tonne (17.2%)
  •   Bananas: 2,000,000 Tonne (34.3%)
  •   Apricots: 1,440,000 Tonne (24.7%)
  •   Pears: 640,000 Tonne (11.0%)
  •   Pineapples: 750,000 Tonne (12.9%)



Error: Image is invalid or non-existent.

  •   1: 1 Units (0.2%)
  •   7: 7 Units (1.5%)
  •   8: 8 Units (1.7%)
  •   9: 9 Units (1.9%)
  •   10: 10 Units (2.1%)
  •   11: 11 Units (2.3%)
  •   12: 12 Units (2.5%)
  •   13: 13 Units (2.7%)
  •   14: 14 Units (2.9%)
  •   15: 15 Units (3.2%)
  •   16: 16 Units (3.4%)
  •   17: 17 Units (3.6%)
  •   18: 18 Units (3.8%)
  •   19: 19 Units (4.0%)
  •   20: 20 Units (4.2%)
  •   21: 21 Units (4.4%)
  •   22: 22 Units (4.6%)
  •   23: 23 Units (4.8%)
  •   24: 24 Units (5.0%)
  •   25: 25 Units (5.3%)
  •   26: 26 Units (5.5%)
  •   27: 27 Units (5.7%)
  •   28: 28 Units (5.9%)
  •   29: 29 Units (6.1%)
  •   30: 30 Units (6.3%)
  •   31: 31 Units (6.5%)

Error: Image is invalid or non-existent.

  •   1: 1 Units (0.2%)
  •   7: 7 Units (1.5%)
  •   8: 8 Units (1.7%)
  •   9: 9 Units (1.9%)
  •   10: 10 Units (2.1%)
  •   11: 11 Units (2.3%)
  •   12: 12 Units (2.5%)
  •   13: 13 Units (2.7%)
  •   14: 14 Units (2.9%)
  •   15: 15 Units (3.2%)
  •   16: 16 Units (3.4%)
  •   17: 17 Units (3.6%)
  •   18: 18 Units (3.8%)
  •   19: 19 Units (4.0%)
  •   20: 20 Units (4.2%)
  •   21: 21 Units (4.4%)
  •   22: 22 Units (4.6%)
  •   23: 23 Units (4.8%)
  •   24: 24 Units (5.0%)
  •   25: 25 Units (5.3%)
  •   26: 26 Units (5.5%)
  •   27: 27 Units (5.7%)
  •   28: 28 Units (5.9%)
  •   29: 29 Units (6.1%)
  •   30: 30 Units (6.3%)
  •   31: 31 Units (6.5%)

--<source lang=lua>
--[[
    keywords are used for languages: they are the names of the actual
    parameters of the template
]]

local keywords = {
    barChart = 'bar chart',
    pieChart = 'pie chart',
    width = 'width',
    height = 'height',
    stack = 'stack',
    colors = 'colors',
    group = 'group',
    xlegend = 'x legends',
    yticks = 'y tick marks',
    tooltip = 'tooltip',
    accumulateTooltip = 'tooltip value accumulation',
    links = 'links',
    defcolor = 'default color',
    scalePerGroup = 'scale per group',
    unitsPrefix = 'units prefix',
    unitsSuffix = 'units suffix',
    groupNames = 'group names',
    hideGroupLegends = 'hide group legends',
    slices = 'slices',
    slice = 'slice',
    radius = 'radius',
    percent = 'percent',

} -- here is what you want to translate

local defColors = require "Module:Plotter/DefaultColors"
local hideGroupLegends

local function nulOrWhitespace( s )
    return not s or mw.text.trim( s ) == ''
end

local function createGroupList( tab, legends, cols )
    if #legends > 1 and not hideGroupLegends then
        table.insert( tab, mw.text.tag( 'div' ) )
        local list = {}
        local spanStyle = "padding:0 1em;background-color:%s;border:1px solid %s;margin-right:1em;-webkit-print-color-adjust:exact;"
        for gi = 1, #legends do
            local span = mw.text.tag( 'span', { style = string.format( spanStyle, cols[gi], cols[gi] ) }, '&nbsp;' ) .. ' '..  legends[gi]
            table.insert( list, mw.text.tag( 'li', {}, span ) )
        end
        table.insert( tab,
            mw.text.tag( 'ul',
                {style="width:100%;list-style:none;-webkit-column-width:12em;-moz-column-width:12em;column-width:12em;"},
                table.concat( list, '\n' )
            )
        )
        table.insert( tab, '</div>' )
    end
end

function pieChart( frame )
    local res, imslices, args = {}, {}, frame.args
    local radius
    local values, colors, names, legends, links = {}, {}, {}, {}, {}
    local delimiter = args.delimiter or ':'
    local lang = mw.getContentLanguage()

    function getArg( s, def, subst, with )
        local result = args[keywords[s]] or def or ''
        if subst and with then result = mw.ustring.gsub( result, subst, with ) end
        return result
    end

    function analyzeParams()
        function addSlice( i, slice )
            local value, name, color, link = unpack( mw.text.split( slice, '%s*' .. delimiter .. '%s*' ) )
            values[i] = tonumber( lang:parseFormattedNumber( value ) )
                or error( string.format( 'Slice %d: "%s", first item("%s") could not be parsed as a number', i, value or '', sliceStr ) )
            colors[i] = not nulOrWhitespace( color ) and color or defColors[i * 2]
            names[i] = name or ''
            links[i] = link
        end
        
        radius = getArg( 'radius', 150 )
        hideGroupLegends = not nulOrWhitespace( args[keywords.hideGroupLegends] )
        local slicesStr = getArg( 'slices' )
        local prefix = getArg( 'unitsPrefix', '', '_', ' ' )
        local suffix = getArg( 'unitsSuffix', '', '_', ' ' )
        local percent = args[keywords.percent]
        local sum = 0
        local i, value = 0
        for slice in mw.ustring.gmatch( slicesStr or '', "%b()" ) do
            i = i + 1
            addSlice( i, mw.ustring.match( slice, '^%(%s*(.-)%s*%)$' ) )
        end
        
        for k, v in pairs(args) do
            local ind = mw.ustring.match( k, '^' .. keywords.slice .. '%s+(%d+)$' )
            if ind then addSlice( tonumber( ind ), v ) end
        end
        
        for _, val in ipairs( values ) do sum = sum + val end
        for i, value in ipairs( values ) do
            local addprec = percent and string.format( ' (%0.1f%%)', value / sum * 100 ) or ''
            legends[i] = mw.ustring.format( '%s: %s%s%s%s', names[i], prefix, lang:formatNum( value ), suffix, addprec )
            links[i] = mw.text.trim( links[i] or mw.ustring.format( '[[#noSuchAnchor|%s]]', legends[i] ) )
        end
    end

    function addRes( ... )
        for _, v in pairs( { ... } ) do
            table.insert( res, v )
        end
    end

    function createImageMap()
        addRes( '{{#tag:imagemap|', 'Image:Circle frame.svg{{!}}' .. ( radius * 2 ) .. 'px' )
        addRes( unpack( imslices ) )
        addRes( 'desc none', '}}' )
    end

    function drawSlice( i, q, start )
        local color = colors[i]
        local angle = start * 2 * math.pi
        local sin, cos = math.abs( math.sin( angle ) ), math.abs( math.cos( angle ) )
        local wsin, wcos = sin * radius, cos * radius
        local s1, s2, w1, w2, w3, w4, width, border
        local style
        if q == 1 then
            border = 'left'
            w1, w2, w3, w4 = 0, 0, wsin, wcos
            s1, s2 = 'bottom', 'left'
        elseif q == 2 then
            border = 'bottom'
            w1, w2, w3, w4 = 0, wcos, wsin, 0
            s1, s2 = 'bottom', 'right'
        elseif q == 3 then
            border = 'right'
            w1, w2, w3, w4 = wsin, wcos, 0, 0
            s1, s2 = 'top', 'right'
        else
            border = 'top'
            w1, w2, w3, w4 = wsin, 0, 0, wcos
            s1, s2 = 'top', 'left'
        end

        local style = string.format( 'border:solid transparent;position:absolute;%s:%spx;%s:%spx;width:%spx;height:%spx', s1, radius, s2, radius, radius, radius )
        if start <= ( q - 1 ) * 0.25 then
            style = string.format( '%s;border:0;background-color:%s', style, color )
        else
            style = string.format( '%s;border-width:%spx %spx %spx %spx;border-%s-color:%s', style, w1, w2, w3, w4, border, color )
        end
        addRes( mw.text.tag( 'div', { style = style }, '' ) )
    end

    function createSlices()
        function coordsOfAngle( angle )
            return ( 100 + math.floor( 100 * math.cos( angle ) ) ) .. ' ' .. ( 100 - math.floor( 100 * math.sin( angle ) ) )
        end

        local sum, start = 0, 0
        for _, value in ipairs( values ) do sum = sum + value end
        for i, value in ipairs(values) do
            local poly = { 'poly 100 100' }
            local startC, endC =  start / sum, ( start + value ) / sum
            local startQ, endQ = math.floor( startC * 4 + 1 ), math.floor( endC * 4 + 1 )
            for q = startQ, math.min( endQ, 4 ) do drawSlice( i, q, startC ) end
            for angle = startC * 2 * math.pi, endC * 2 * math.pi, 0.02 do
                table.insert( poly,  coordsOfAngle( angle ) )
            end
            table.insert( poly, coordsOfAngle( endC * 2 * math.pi ) .. ' 100 100 ' .. links[i] )
            table.insert( imslices, table.concat( poly, ' ' ) )
            start = start + values[i]
        end
    end

    analyzeParams()
    if #values == 0 then error( "no slices found - can't draw pie chart" ) end
    addRes( mw.text.tag( 'div', { class = 'chart noresize', style = string.format( 'margin-top:0.5em;max-width:%spx;', radius * 2 ) } ) )
    addRes( mw.text.tag( 'div', { style = string.format( 'position:relative;min-width:%spx;min-height:%spx;max-width:%spx;overflow:hidden;', radius * 2, radius * 2, radius * 2 ) } ) )
    createSlices()
    addRes( mw.text.tag( 'div', { style = string.format( 'position:absolute;min-width:%spx;min-height:%spx;overflow:hidden;', radius * 2, radius * 2 ) } ) )
    createImageMap()
    addRes( '</div>' ) -- close "position:relative" div that contains slices and imagemap.
    addRes( '</div>' ) -- close "position:relative" div that contains slices and imagemap.
    createGroupList( res, legends, colors ) -- legends
    addRes( '</div>' ) -- close containing div
    return frame:preprocess( table.concat( res, '\n' ) )
end


function barChart( frame )
    local res = {}
    local args = frame.args -- can be changed to frame:getParent().args
    local values, xlegends, colors, tooltips, yscales = {}, {}, {}, {} ,{}, {}, {}
    local groupNames, unitsSuffix, unitsPrefix, links = {}, {}, {}, {}
    local width, height, yticks, stack, delimiter = 500, 350, -1, false, args.delimiter or ':'
    local chartWidth, chartHeight, defcolor, scalePerGroup, accumulateTooltip


    local numGroups, numValues
    local scaleWidth

    function validate()
        function asGroups( name, tab, toDuplicate, emptyOK )
            if #tab == 0 and not emptyOK then
                error( "must supply values for " .. keywords[name] )
            end
            if #tab == 1 and toDuplicate then
                for i = 2, numGroups do tab[i] = tab[1] end
            end
            if #tab > 0 and #tab ~= numGroups then
                error ( keywords[name] .. ' must contain the same number of items as the number of groups, but it contains ' .. #tab .. ' items and there are ' .. numGroups .. ' groups')
            end
        end

        -- do all sorts of validation here, so we can assume all params are good from now on.
        -- among other things, replace numerical values with mw.language:parseFormattedNumber() result


        chartHeight = height - 80
        numGroups = #values
        numValues = #values[1]
        defcolor = defcolor or 'blue'
        colors[1] = colors[1] or defcolor
        scaleWidth = scalePerGroup and 80 * numGroups or 100
        chartWidth = width -scaleWidth
        asGroups( 'unitsPrefix', unitsPrefix, true, true )
        asGroups( 'unitsSuffix', unitsSuffix, true, true )
        asGroups( 'colors', colors, true, true )
        asGroups( 'groupNames', groupNames, false, false )
        if stack and scalePerGroup then
            error( string.format( 'Illegal settings: %s and %s are incompatible.', keyword.stack, keyword.scalePerGroup ) )
        end
        for gi = 2, numGroups do
            if #values[gi] ~= numValues then error( keywords.group .. " " .. gi .. " does not have same number of values as " .. keywords.group .. " 1" ) end
        end
        if #xlegends ~= numValues then error( 'Illegal number of ' .. keywords.xlegend .. '. Should be exactly ' .. numValues ) end
    end

    function extractParams()
        function testone( keyword, key, val, tab )
            i = keyword == key and 0 or key:match( keyword .. "%s+(%d+)" )
            if not i then return end
            i = tonumber( i ) or error("Expect numerical index for key " .. keyword .. " instead of '" .. key .. "'")
            if i > 0 then tab[i] = {} end
            for s in mw.text.gsplit( val, '%s*' .. delimiter .. '%s*' ) do
                table.insert( i == 0 and tab or tab[i], s )
            end
            return true
        end

        for k, v in pairs( args ) do
            if k == keywords.width then
                width = tonumber( v )
                if not width or width < 200 then
                    error( 'Illegal width value (must be a number, and at least 200): ' .. v )
                end
            elseif k == keywords.height then
                height = tonumber( v )
                if not height or height < 200 then
                    error( 'Illegal height value (must be a number, and at least 200): ' .. v )
                end
            elseif k == keywords.stack then stack = true
            elseif k == keywords.yticks then yticks = tonumber(v) or -1
            elseif k == keywords.scalePerGroup then scalePerGroup = true
            elseif k == keywords.defcolor then defcolor = v
            elseif k == keywords.accumulateTooltip then accumulateTooltip = not nulOrWhitespace( v )
            elseif k == keywords.hideGroupLegends then hideGroupLegends = not nulOrWhitespace( v )
            else
                for keyword, tab in pairs( {
                    group = values,
                    xlegend = xlegends,
                    colors = colors,
                    tooltip = tooltips,
                    unitsPrefix = unitsPrefix,
                    unitsSuffix = unitsSuffix,
                    groupNames = groupNames,
                    links = links,
                    } ) do
                        if testone( keywords[keyword], k, v, tab )
                            then break
                        end
                end
            end
        end
    end

    function roundup( x ) -- returns the next round number: eg., for 30 to 39.999 will return 40, for 3000 to 3999.99 wil return 4000. for 10 - 14.999 will return 15.
        local ordermag = 10 ^ math.floor( math.log10( x ) )
        local normalized = x /  ordermag
        local top = normalized >= 1.5 and ( math.floor( normalized + 1 ) ) or 1.5
        return ordermag * top, top, ordermag
    end

    function calcHeightLimits() -- if limits were passed by user, use them, otherwise calculate. for "stack" there's only one limet.
        if stack then
            local sums = {}
            for _, group in pairs( values ) do
                for i, val in ipairs( group ) do sums[i] = ( sums[i] or 0 ) + val end
            end
            local sum = math.max( unpack( sums ) )
            for i = 1, #values do yscales[i] = sum end
        else
            for i, group in ipairs( values ) do yscales[i] = math.max( unpack( group ) ) end
        end
        for i, scale in ipairs( yscales ) do yscales[i] = roundup( scale * 0.9999 ) end
        if not scalePerGroup then for i = 1, #values do yscales[i] = math.max( unpack( yscales ) ) end end
    end

    function tooltip( gi, i, val )
        if tooltips and tooltips[gi] and not nulOrWhitespace( tooltips[gi][i] ) then return tooltips[gi][i], true end
        local groupName = not nulOrWhitespace( groupNames[gi] ) and groupNames[gi] .. ': ' or ''
        local prefix = unitsPrefix[gi] or unitsPrefix[1] or ''
        local suffix = unitsSuffix[gi] or unitsSuffix[1] or ''
        return mw.ustring.gsub(groupName .. prefix .. mw.getContentLanguage():formatNum( tonumber( val ) or 0 ) .. suffix, '_', ' '), false
    end

    function calcHeights( gi, i, val )
        local barHeight = math.floor( val / yscales[gi] * chartHeight + 0.5 ) -- add half to make it "round" instead of "trunc"
        local top, base = chartHeight - barHeight, 0
        if stack then
            local rawbase = 0
            for j = 1, gi - 1 do rawbase = rawbase + values[j][i] end -- sum the "i" value of all the groups below our group, gi.
            base = math.floor( chartHeight * rawbase / yscales[gi] ) -- normally, and especially if it's "stack", all the yscales must be equal.
        end
        return barHeight, top - base
    end

    function groupBounds( i )
        local setWidth = math.floor( chartWidth / numValues )
        local setOffset = ( i - 1 ) * setWidth
        return setOffset, setWidth
    end

    function calcx( gi, i )
        local setOffset, setWidth = groupBounds( i )
        if stack or numGroups == 1 then
            local barWidth = math.min( 38, math.floor( 0.8 * setWidth ) )
            return setOffset + (setWidth - barWidth) / 2, barWidth
        end
        setWidth = 0.85 * setWidth
        local barWidth = math.floor( 0.75 * setWidth / numGroups )
        local left = setOffset + math.floor( ( gi - 1 ) / numGroups * setWidth )
        return left, barWidth
    end

    function drawbar( gi, i, val, ttval )
        if val == '0' then return end -- do not show single line (borders....) if value is 0, or rather, '0'. see talkpage

        local color, tooltip, custom = colors[gi] or defcolor or 'blue', tooltip( gi, i, ttval or val )
        local left, barWidth = calcx( gi, i )
        local barHeight, top = calcHeights( gi, i, val )
        
        -- borders so it shows up when printing
        local style = string.format("position:absolute;left:%spx;top:%spx;height:%spx;min-width:%spx;max-width:%spx;background-color:%s;-webkit-print-color-adjust:exact;border:1px solid %s;border-bottom:none;overflow:hidden;",
                        left, top, barHeight-1, barWidth-2, barWidth-2, color, color)
        local link = links[gi] and links[gi][i] or ''
        local img = not nulOrWhitespace( link ) and mw.ustring.format( '[[File:Transparent.png|1000px|link=%s|%s]]', link, custom and tooltip or '' ) or ''
        table.insert( res, mw.text.tag( 'div', { style = style, title = tooltip, }, img ) )
    end


    function drawYScale()
        function drawSingle( gi, color, width, yticks, single )
            local yscale = yscales[gi]
            local _, top, ordermag = roundup( yscale * 0.999 )
            local numnotches = yticks >= 0 and yticks or
            		(top <= 1.5 and top * 4
            		or top < 4  and top * 2
                    or top)
            local valStyleStr =
                single and 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;padding:0 2px'
                or 'position:absolute;height=20px;text-align:right;vertical-align:middle;width:%spx;top:%spx;left:3px;background-color:%s;color:white;font-weight:bold;text-shadow:-1px -1px 0 #000,1px -1px 0 #000,-1px 1px 0 #000,1px 1px 0 #000;padding:0 2px'
            local notchStyleStr = 'position:absolute;height=1px;min-width:5px;top:%spx;left:%spx;border:1px solid %s;'
            for i = 1, numnotches do
                local val = i / numnotches * yscale
                local y = chartHeight - calcHeights( gi, 1, val )
                local div = mw.text.tag( 'div', { style = string.format( valStyleStr, width - 10, y - 10, color ) }, mw.getContentLanguage():formatNum( tonumber( val ) or 0 ) )
                table.insert( res, div )
                div = mw.text.tag( 'div', { style = string.format( notchStyleStr, y, width - 4, color ) }, '' )
                table.insert( res, div )
            end
        end

        if scalePerGroup then
            local colWidth = 80
            local colStyle = "position:absolute;height:%spx;min-width:%spx;left:%spx;border-right:1px solid %s;color:%s"
            for gi = 1, numGroups do
                local left = ( gi - 1 ) * colWidth
                local color = colors[gi] or defcolor
                table.insert( res, mw.text.tag( 'div', { style = string.format( colStyle, chartHeight, colWidth, left, color, color ) } ) )
                drawSingle( gi, color, colWidth, yticks )
                table.insert( res, '</div>' )
            end
        else
            drawSingle( 1, 'black', scaleWidth, yticks, true )
        end
    end

    function drawXlegends()
        local setOffset, setWidth
        local legendDivStyleFormat = "position:absolute;left:%spx;top:10px;min-width:%spx;max-width:%spx;text-align:center;vertical-align:top;"
        local tickDivstyleFormat = "position:absolute;left:%spx;height:10px;width:1px;border-left:1px solid black;"
        for i = 1, numValues do
            if not nulOrWhitespace( xlegends[i] ) then
                setOffset, setWidth = groupBounds( i )
                -- setWidth = 0.85 * setWidth
                table.insert( res, mw.text.tag( 'div', { style = string.format( legendDivStyleFormat, setOffset + 5, setWidth - 10, setWidth - 10 ) }, xlegends[i] or '' ) )
                table.insert( res, mw.text.tag( 'div', { style = string.format( tickDivstyleFormat, setOffset + setWidth / 2 ) }, '' ) )
            end
        end
    end

    function drawChart()
        table.insert( res, mw.text.tag( 'div', { class = 'chart noresize', style = string.format( 'margin-top:1em;max-width:%spx;', width ) } ) )
        table.insert( res, mw.text.tag( 'div', { style = string.format("position:relative;min-height:%spx;min-width:%spx;max-width:%spx;", height, width, width ) } ) )

        table.insert( res, mw.text.tag( 'div', { style = string.format("float:right;position:relative;min-height:%spx;min-width:%spx;max-width:%spx;border-left:1px black solid;border-bottom:1px black solid;", chartHeight, chartWidth, chartWidth ) } ) )
        local acum = stack and accumulateTooltip and {}
        for gi, group in pairs( values ) do
            for i, val in ipairs( group ) do
                if acum then acum[i] = ( acum[i] or 0 ) + val end
                drawbar( gi, i, val, acum and acum[i] )
            end
        end
        table.insert( res, '</div>' )
        table.insert( res, mw.text.tag( 'div', { style = string.format("position:absolute;height:%spx;min-width:%spx;max-width:%spx;", chartHeight, scaleWidth, scaleWidth, scaleWidth ) } ) )
        drawYScale()
        table.insert( res, '</div>' )
        table.insert( res, mw.text.tag( 'div', { style = string.format( "position:absolute;top:%spx;left:%spx;width:%spx;", chartHeight, scaleWidth, chartWidth ) } ) )
        drawXlegends()
        table.insert( res, '</div>' )
        table.insert( res, '</div>' )
        createGroupList( res, groupNames, colors )
        table.insert( res, '</div>' )
    end

    extractParams()
    validate()
    calcHeightLimits()
    drawChart()
    return table.concat( res, "\n" )
end

return {
    ['bar-chart'] = barChart,
    [keywords.barChart] = barChart,
    [keywords.pieChart] = pieChart,
}
--</source>