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bsw@1045
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1 function util.initiative_pie(initiative, d, gap)
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bsw@1045
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2 if not initiative.issue.closed or not initiative.admitted then
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bsw@1045
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3 return
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bsw@1045
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4 end
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bsw@1045
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5
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bsw@1045
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6 if initiative.issue.voter_count == 0 or initiative.positive_votes == nil or initiative.negative_votes == nil then
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bsw@1045
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7 return
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bsw@1045
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8 end
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bsw@1045
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9
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bsw@1045
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10 local first_preference_votes = initiative.first_preference_votes
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bsw@1045
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11
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bsw@1045
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12 local d = d or 100
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bsw/jbe@1309
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13 local gap = 2
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bsw@1045
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14
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bsw@1045
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15 local r = d/2
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bsw@1045
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16 local r_circle = r - gap
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bsw@1045
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17
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bsw@1045
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18 local function circle(p)
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bsw@1045
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19 return
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bsw@1045
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20 gap + 2 * r_circle * ( 1 + math.sin( 2 * math.pi * p ) ) / 2,
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bsw@1045
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21 gap + 2 * r_circle * ( 1 - math.cos( 2 * math.pi * p ) ) / 2
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bsw@1045
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22 end
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bsw@1045
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23
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bsw@1045
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24 local function getpath(start, stop)
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bsw@1045
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25 local start_x, start_y = circle(start)
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bsw@1045
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26 local stop_x, stop_y = circle(stop)
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bsw@1045
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27 local large = stop - start > 0.5 and "1" or "0"
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bsw@1045
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28 return "M" .. r .. "," .. r .. " "
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bsw@1045
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29 .. "L" .. start_x .. ",".. start_y .. " " .. " "
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bsw@1045
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30 .. "A" .. r_circle .. "," .. r_circle .. " 0 " .. large .. ",1 " .. stop_x .. "," .. stop_y .. " "
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bsw@1045
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31 .. "z"
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bsw@1045
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32 end
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bsw@1045
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33
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bsw@1045
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34 local function uniPie(color, content)
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bsw@1045
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35 ui.tag {
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bsw@1045
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36 tag = "svg",
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bsw@1045
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37 attr = {
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bsw@1045
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38 class = "initiative_pie",
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bsw@1045
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39 width = d .. "px",
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bsw@1045
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40 height = d .. "px",
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bsw@1045
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41 },
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bsw@1045
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42 content = function ()
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bsw@1045
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43 ui.tag { tag = "circle", attr = {
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bsw@1045
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44 cx=r, cy=r, r=r_circle, fill = color, stroke = "#fff", ["stroke-width"] = "2"
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bsw@1045
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45 }, content = function () ui.tag { tag = "title", content = content } end }
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bsw@1045
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46 end
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bsw@1045
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47 }
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bsw@1045
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48 end
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bsw@1045
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49
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bsw@1045
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50 local function piePiece(path, fill, content)
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bsw@1045
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51 ui.tag {
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bsw@1045
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52 tag = "path",
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bsw@1045
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53 attr = {
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bsw@1045
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54 d = path,
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bsw@1045
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55 fill = fill,
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bsw@1045
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56 stroke = "#fff",
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bsw@1045
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57 ["stroke-width"] = "2",
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bsw@1045
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58 ["stroke-linecap"] = "butt"
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bsw@1045
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59 },
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bsw@1045
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60 content = function ()
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bsw@1045
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61 ui.tag {
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bsw@1045
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62 tag = "title",
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bsw@1045
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63 content = content
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bsw@1045
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64 }
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bsw@1045
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65 end
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bsw@1045
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66 }
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bsw@1045
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67 end
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bsw@1045
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68
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bsw@1045
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69 local function pie(args)
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bsw@1045
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70 local offset = args.offset or 0
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bsw@1045
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71 local list = {}
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bsw@1045
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72 local sum = 0
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bsw@1045
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73 for i, element in ipairs(args) do
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bsw@1045
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74 element.start = sum + offset
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bsw@1045
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75 list[#list+1] = element
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bsw@1045
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76 sum = sum + element.value
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bsw@1045
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77 end
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bsw@1045
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78
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bsw@1045
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79 for i, element in ipairs(list) do
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bsw@1045
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80 if element.value == sum then
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bsw@1045
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81 uniPie(element.fill, _(element.label, { count = element.value } ))
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bsw@1045
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82 return
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bsw@1045
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83 end
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bsw@1045
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84 end
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bsw@1045
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85 ui.tag {
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bsw@1045
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86 tag = "svg",
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bsw@1045
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87 attr = {
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bsw@1045
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88 class = "initiative_pie",
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bsw@1045
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89 width = d .. "px",
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bsw@1045
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90 height = d .. "px"
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bsw@1045
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91 },
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bsw@1045
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92 content = function ()
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bsw@1045
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93 table.sort(list, function (a, b)
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bsw@1045
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94 return a.value < b.value
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bsw@1045
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95 end )
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bsw@1045
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96 for i, element in ipairs(list) do
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bsw@1045
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97 local path = getpath(element.start / sum, (element.start + element.value) / sum)
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bsw@1045
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98 local content = _(element.label, { count = element.value })
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bsw@1045
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99 piePiece(path, element.fill, content)
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bsw@1045
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100 end
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bsw@1045
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101 end
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bsw@1045
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102 }
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bsw@1045
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103 end
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bsw@1045
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104
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bsw@1045
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105 local yes1 = first_preference_votes
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bsw@1045
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106 local yes = initiative.positive_votes - first_preference_votes
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bsw@1045
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107 local neutral = initiative.issue.voter_count - initiative.positive_votes - initiative.negative_votes
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bsw@1045
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108 local no = initiative.negative_votes
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bsw@1045
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109
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bsw@1045
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110 local sum = yes1 + yes + neutral + no
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bsw@1045
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111
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bsw@1045
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112 local q = initiative.issue.policy.direct_majority_num / initiative.issue.policy.direct_majority_den
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bsw@1045
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113
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bsw@1045
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114
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bsw@1045
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115 local maxrot = sum * 7 / 12 - no
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bsw@1045
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116
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bsw@1045
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117 local offset = 0
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bsw@1045
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118
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bsw@1045
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119 if maxrot > 0 then
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bsw@1045
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120 offset = math.min (
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bsw@1045
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121 maxrot,
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bsw@1045
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122 no * ( 1 / ( 1 / q - 1 ) -1 ) / 2
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bsw@1045
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123 )
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bsw@1045
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124 end
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bsw@1045
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125
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bsw@1045
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126 pie{
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bsw@1045
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127 { value = yes1, fill = "#0a0", label = _"#{count} Yes, first choice" },
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bsw@1045
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128 { value = yes, fill = "#6c6", label = _"#{count} Yes, alternative choice" },
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bsw@1045
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129 { value = neutral, fill = "#ccc", label = _"#{count} Neutral" },
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bsw@1045
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130 { value = no, fill = "#c00", label = _"#{count} No" },
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bsw@1045
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131 offset = - offset
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bsw@1045
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132 }
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bsw@1045
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133
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bsw/jbe@1309
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134 end
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