visualProject/drawMap.js at master · cyy0915/visualProject · GitHub

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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
function drawMap(data, category, time) {
    var map = L
        .map('graph1')
        .setView([47, 2], 2);   // center position + zoom

// Add a tile to the map = a background. Comes from OpenStreetmap
    L.tileLayer(
        'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a>',
            maxZoom: 6,
            noWrap: true
        }).addTo(map);

// Add a svg layer to the map
    L.svg().addTo(map);

    var svg =  d3.select('#graph1').select('svg');
    svg.attr('pointer-events', 'all');
    var viewBox = svg.attr('viewBox');
    viewBox = viewBox.split(' ');
    var width = viewBox[2]; var height = viewBox[3];
    var adjustx = viewBox[2]/width; var adjusty = viewBox[3]/height;
    //svg.attr('viewBox', `(${viewBox[0]},${viewBox[1]},${width}, ${height})`);
    function click1(d){
        if (interactPara.countrySelect.indexOf(d.iso_code)===-1){
            countrySelect(d.iso_code);
            //$(this).attr('stroke', 'black').attr('stroke-width', '2');
        }
        else{
            countryCancelSelect(d.iso_code);
            //$(this).attr('stroke-width', '0');
        }
    }
    function mousemove(d){
        $(this).attr('stroke', 'black').attr('stroke-width', '2');
    }
    function mouseout(d){
        if (interactPara.countrySelect.indexOf(d.iso_code)===-1) {
            $(this).attr('stroke-width', '0');
        }
    }
    // Function that update circle position if something change
    function update() {
        d3.selectAll("circle")
            .attr("cx", function(d){ return map.latLngToLayerPoint([d.latitude, d.longitude]).x * adjustx})
            .attr("cy", function(d){ return map.latLngToLayerPoint([d.latitude, d.longitude]).y * adjusty })
    }

    function mainStep(category, time) {
        var dataForDraw = data.timeData[time];
        var countryPosition = data.countryPosition;
        var tmp = [];
        for (var i in dataForDraw){
            var position = countryPosition[dataForDraw[i]['iso_code']];
            if (position!==undefined) {
                dataForDraw[i].latitude = Number(position.latitude);
                dataForDraw[i].longitude = Number(position.longitude);
                tmp.push(dataForDraw[i]);
            }
        }
        dataForDraw = tmp;
        var scale;
        if (category!=='Case-Fatality_Ratio') {
            scale = d3.scaleLinear().domain([0, Math.log(d3.max(data.raw, d => d[category]))]).range([2, 25]);
        }
        else{
            scale = d3.scaleLinear().domain([0, 0.2]).range([2, 25]);
        }

        svg.selectAll("circle")
            .data(dataForDraw)
            .join('circle')
            .attr("cx", function(d){ return map.latLngToLayerPoint([d.latitude, d.longitude]).x * adjustx })
            .attr("cy", function(d){ return map.latLngToLayerPoint([d.latitude, d.longitude]).y * adjusty })
            .attr("r", function (d) {
                if (category !=='Case-Fatality_Ratio') {
                    var tmp = Math.log(d[category]);
                    if (tmp >= 0) {
                        return scale(tmp);
                    } else {
                        return scale(0);
                    }
                }
                else{
                    if (d[category]>0.2){
                        return scale(0.2);
                    }
                    else{
                        return scale(d[category]);
                    }
                }
            })
            .style("fill", "steelblue")
            .attr("fill-opacity", 0.7);

        svg.selectAll('circle')
            .on('click', click1)
            .on('mousemove', mousemove)
            .on('mouseout', mouseout);
    }

    mainStep(category, time);
// If the user change the map (zoom or drag), I update circle position:
    map.on("moveend", update);

    var mG = {};
    mG.update = function (category, time) {
        mainStep(category, time);
    };

    mG.countrySelect = function (country) {
        svg.selectAll('circle')
            .attr('stroke', 'black')
            .attr('stroke-width', function (d) {
                if (interactPara.countrySelect.indexOf(d.iso_code)!==-1){
                    return '2';
                }
                else{
                    return '0';
                }
            });
        var tmp = data.countryPosition[interactPara.recentSelect];
        map.setView([tmp.latitude, tmp.longitude]);
    };
    mG.countryCancelSelect = function (country) {
        svg.selectAll('circle')
            .attr('stroke', 'black')
            .attr('stroke-width', function (d) {
                if (interactPara.countrySelect.indexOf(d.iso_code)!==-1){
                    return '2';
                }
                else{
                    return '0';
                }
            });
    };
    return mG;
}