CZ: Elections 2017

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        <h1 class="text-center top bg-primary">
            CZECH REPUBLIC 2017: WINNING PARTIES
        </h1>

<div class="alert alert-info" id="legend" style="position:absolute;top:100px;">
            <span style="color:white">Bubble Size ~ Number of Voters</span><br />
            <span style="color:white">Winning Parties:<br />
                <span>
                <svg height="20" width="20"><circle cx="10" cy="10" r="10" fill="#261060"></svg> ANO<br />
                <svg height="20" width="20"><circle cx="10" cy="10" r="10" fill="#004494"></svg> ODS<br />
                <svg height="20" width="20"><circle cx="10" cy="10" r="10" fill="#e6ac21"></svg> KDU-ČSL<br />
                <svg height="20" width="20"><circle cx="10" cy="10" r="10" fill="#5d8c00"></svg> STAN<br />
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    var parties = ["ODS", "ŘN-VU", "CESTA", "ČSSD", "PB", "RČ", "STAN", "KSČM", "Zelení", "Rozumní", "SPDVPÚ", "Svobodní", "BPI", "ODA", "Piráti", "Občané 2011", "HAVEL", "ČNF", "REU", "TOP 09", "ANO", "DV 2016", "SPR-RSČ", "KDU-ČSL", "ČSNS", "Realisté", "SPS", "DSSS", "SPD", "SPO", "NáS"]

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               }
            }
        ]
    }
    // transform geojson coordinates into an array of L.LatLng
    var coordinates = cz.features[0].geometry.coordinates[0];
    var latLngs = [];
    for (i=0; i<coordinates.length; i++) {
        latLngs.push(new L.LatLng(coordinates[i][1], coordinates[i][0]));
    }

//svg
    var svg = d3.select(map.getPanes().overlayPane).append("svg").attr("class", "bubbles");

/* Initialize tooltip */
    var tip = changetooltip();

/* Invoke the tip in the context of your visualization */
    svg.call(tip);

// Add tooltip div
    var div = d3.select("body").append("div")
        .attr("class", "tooltip")
        .style("opacity", 1e-6);

//visualization
    d3.csv(csvm, function(geos) {
        d3.csv(csva, function(actorsar) {

geos.sort(function(a, b) {
                return parseFloat(b.population) - parseFloat(a.population);
            });

//reorder votes
            var votes = {};
            for(i=0;i<geos.length;i++) {

if (typeof(votes[geos[i]['id']]) == 'undefined') {
                    votes[geos[i]['id']] = {
                        'population': parseInt(geos[i]['population']),
                        'n': []
                    }
                }
                for (var k in parties) {
                    var p = parties[k];
                    var v = parseInt(geos[i][p]);
                    votes[geos[i]['id']]['n'].push({'n': v, 'abbreviation': p})
                }
                // sort
                votes[geos[i]['id']]['n'].sort(function(a, b) {
                    return parseFloat(b.n) - parseFloat(a.n);
                });
                // v = parseInt(votesar[i]['votes']);
                // votes[votesar[i]['municipality_id']]['population'] += v;
                // votes[votesar[i]['municipality_id']]['n'].push({'n': v, 'id': votesar[i]['actor_id']})
            }

//max population
            maxpopulation = 0
            for (var k in votes) {
                if ((typeof(votes[k].population) != 'undefined') && (votes[k].population > maxpopulation))
                    maxpopulation = votes[k].population;
            }
            if (getUrlParameter('maxdomain'))
                if (isNumeric(getUrlParameter('maxdomain')))
                    var maxdomain = getUrlParameter('maxdomain');
                else
                    var maxdomain = maxpopulation;
            else
                var maxdomain = maxpopulation;

//scale
            var radiusScale = d3.scale.sqrt().domain([0, maxdomain]).range([0, maxrange]);

//mapping
            actors = toObjectWithAbbr(actorsar);
            nodes = geos
                .map(function(d) {
                    var mpoint = projectPoint(d.latitude,d.longitude);
                    if (typeof(votes[d.id]) != 'undefined')
                        var r = radiusScale(votes[d.id].population);
                    else
                        var r = 0;
                    return {
                        x: mpoint.x,
                        y: mpoint.y,
                        r: r,
                        name: d.name,
                        value: d,  //including whole d ?
                        actors: votes[d.id]
                    }
                });

//adding circles
                var circle = svg.selectAll("svg")
                    .data(nodes)
                    .enter().append("svg:svg")
                    .append("svg:circle")
                    .attr("class","bubble")
                    .attr("cx", function (d) {return d.x})
                    .attr("cy", function (d) {return d.y})
                    .attr("r", function (d) {
                        return d.r
                    })
                    .attr("fill", function (d) {
                        if ((typeof(d.actors) != 'undefined') && (typeof(actors[d.actors.n[0].abbreviation]) != 'undefined')) {
                            if (typeof(actors[d.actors.n[0].abbreviation].color) == 'undefined') return '#ccf'; else return actors[d.actors.n[0].abbreviation].color;
                        } else {
                            return '#ccf';
                        }
                    })
                    .attr("stroke",function (d) {return actors[d.actors.n[0].abbreviation].color;})
                    .on("mouseover", tip.show)
                    .on("mouseout", tip.hide)
                    .on("click", tip.show);

//on zoom or map movement, https://leafletjs.com/reference.html#events
                map.on("viewreset", changeit);
                map.on("moveend", changeit);
                //map.on("move", hidepoints);   //not needed
                map.on("zoomstart", hidepoints);
                $(".bubbles").show(100);

});
    });

//helper function matrix to values
    function matrixVal(s) {
        return s.split('(')[1].split(')')[0].split(',');
    }

//hide points
    function hidepoints() {
        $(".bubbles").hide();
    }

// adjust points after map change (zoom, move)
    function changeit() {
        //Chromium/Chrome does not support well changes, so:
        var s = $(".leaflet-map-pane").css("-webkit-transform");  //chromium, opera
        if (typeof(s) == 'undefined')
        var s = $(".leaflet-map-pane").css("transform");  //ff
        var sar = matrixVal(s);

//if towns in svg: (not used if it is div)
        $(".bubbles").css('left',-1*parseFloat(sar[4]));
        $(".bubbles").css('top',-1*parseFloat(sar[5]));

d3.selectAll(".bubble").each(function(d,i) {
        //set correct x,y
            mpoint = projectPoint(d.value.latitude,d.value.longitude,d.value.id);
            $(this)
                .attr("r",
                d.r * Math.pow(map.getZoom(),5) / Math.pow(defaultzoom,5)	//power of 3 to show the results better in small scale
            )
            /*.attr("stroke-width",
            Math.abs(radiusScale(d.value.population.p9)-radiusScale(d.value.population.p6)) * Math.pow(map.getZoom(),3) / 729	//power of 3 to show the results better in small scale
            )*/
            .attr("cx", mpoint.x)
            .attr("cy", mpoint.y);

//Reposition the SVG to cover the features.
            //note: if towns is div, next lines are needed; if it is svg, it is different:
            $(this).attr('transform',"translate(" + sar[4] + "," + sar[5] + ")");
            /*$(this).parent().css('left',-1*parseFloat(sar[4]));
            $(this).parent().css('top',-1*parseFloat(sar[5]));*/

});
        $(".bubbles").show(300);

}

//tooltip
    function changetooltip() {
      tip = d3.tip().attr('class', 'd3-tip').html(function(d) {
        html = '<span class="stronger">' + d.name + "</span><br>";
        if (typeof(d.actors.n) != 'undefined') {
          html += "<table>"
          $.each(d.actors.n, function(i,v) {

if (i < 9) {
                  html += "<tr><td><strong>" + actors[v.abbreviation].abbreviation + '</strong><td class="d3-tip-number"> <strong>' + Math.round(1000*parseInt(v.n)/parseInt(d.actors.population))/10 +"% " +  " </strong><td class='d3-tip-number'> " + parseInt(v.n).toLocaleString();
              }
          });
          html += "</table>"
        }
        /*if (typeof(d.value.description) != 'undefined') {
          html += d.value.description;
        }*/
        /*else
          html += 'Ešte nie je rozhodnuté';*/

return html;
      });
      return tip;
    }

// Use Leaflet to implement a D3 geometric transformation.
    function projectPoint(x, y, id) {
        var point = map.latLngToLayerPoint(new L.LatLng(x, y));
        if (!isNumeric(point.x)) alert(id);
        return point;
    }

// helper function
    function toObjectWithAbbr(arr) {
      var rv = {};
      for (var i = 0; i < arr.length; ++i)
        rv[arr[i]['abbreviation']] = arr[i];
      return rv;
    }

// helper function in debugging
    function isNumeric(n) {
      return !isNaN(parseFloat(n)) && isFinite(n);
    }

//helper function for default values
    function getUrlParameter(sParam) {
        var sPageURL = decodeURIComponent(window.location.search.substring(1)),
            sURLVariables = sPageURL.split('&'),
            sParameterName,
            i;

for (i = 0; i < sURLVariables.length; i++) {
            sParameterName = sURLVariables[i].split('=');

if (sParameterName[0] === sParam) {
                return sParameterName[1] === undefined ? true : sParameterName[1];
            }
        }
    };
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