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   http://www.apache.org/licenses/LICENSE-2.0

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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/simpleRequire.js"></script>
        <script src="lib/config.js"></script>
        <script src="lib/testHelper.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="http://api.map.baidu.com/api?v=2.0&ak=KOmVjPVUAey1G2E8zNhPiuQ6QiEmAwZu"></script>
        <link rel="stylesheet" href="lib/reset.css" />
    </head>
    <body>
        <style>
            h1 {
                line-height: 60px;
                height: 60px;
                background: #ddd;
                text-align: center;
                font-weight: bold;
                font-size: 14px;
            }
            .chart {
                height: 100%;
            }
            #pens {
                position: fixed;
                right: 10px;
                top: 10px;
                z-index: 9999999;
                border: 2px solid #aaa;
                text-align: center;
            }
            #pens div {
                width: 40px;
                height: 20px;
                cursor: pointer;
            }
        </style>

        <div id="pens">
            <span>free</span>
        </div>

        <div class="chart" id="grid"></div>


        <script>

            var COLORS = ["#070093", "#1c3fbf", "#1482e5", "#70b4eb", "#b4e0f3", "#ffffff"];

            function initPens(echarts, chart, data) {

                var currColorIndex = 0;
                var pens = $('#pens');

                COLORS.forEach(function (color, index) {
                    var penEl = $('<div></div>').css('background', color);
                    pens.append(penEl);
                    penEl.on('click', function () {
                        currColorIndex = index;
                    });
                });

                var drawing;
                var downing;
                chart.getZr().on('mousedown', function (e) {
                    downing = [e.offsetX, e.offsetY];
                });
                chart.getZr().on('mouseup', function (e) {
                    if (!downing) {
                        return;
                    }
                    if (Math.pow(e.offsetX - downing[0], 2) + Math.pow(e.offsetY - downing[1], 2) > 4) {
                        return;
                    }
                    drawing = !drawing;
                    $('#pens span')[0].innerHTML = !!drawing ? 'draw' : 'free';
                    downing = null;
                });
                chart.on('mousemove', function (params) {
                    if (!drawing) {
                        return;
                    }

                    var dataIndex = params.dataIndex;
                    var value = params.value;
                    data[dataIndex][2] = currColorIndex;

                    update();
                });

                var update = echarts.throttle(function () {
                    chart.setOption({
                        series: {
                            data: data
                        }
                    });
                }, 300);
            }

        </script>


        <script>

            var data;

            require([
                'echarts',
                'extension/bmap'
            ], function (echarts) {

                var lngExtent = [39.5, 40.6];
                var latExtent = [115.9, 116.8];
                var cellCount = [50, 50];
                var cellSizeCoord = [
                    (lngExtent[1] - lngExtent[0]) / cellCount[0],
                    (latExtent[1] - latExtent[0]) / cellCount[1]
                ];
                var gapSize = 0;
                data = 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,[42,41,5],[43,41,5],[44,41,5],[45,41,5],[46,41,5],[47,41,5],[48,41,5],[49,41,5],[0,42,5],[1,42,5],[2,42,5],[3,42,5],[4,42,5],[5,42,5],[6,42,5],[7,42,5],[8,42,5],[9,42,5],[10,42,5],[11,42,4],[12,42,4],[13,42,5],[14,42,5],[15,42,4],[16,42,4],[17,42,5],[18,42,5],[19,42,5],[20,42,5],[21,42,5],[22,42,5],[23,42,5],[24,42,5],[25,42,5],[26,42,5],[27,42,5],[28,42,5],[29,42,2],[30,42,5],[31,42,5],[32,42,5],[33,42,5],[34,42,5],[35,42,5],[36,42,5],[37,42,5],[38,42,5],[39,42,5],[40,42,5],[41,42,5],[42,42,5],[43,42,5],[44,42,5],[45,42,5],[46,42,5],[47,42,5],[48,42,5],[49,42,5],[0,43,5],[1,43,5],[2,43,5],[3,43,5],[4,43,5],[5,43,5],[6,43,5],[7,43,5],[8,43,5],[9,43,5],[10,43,5],[11,43,5],[12,43,5],[13,43,2],[14,43,5],[15,43,5],[16,43,5],[17,43,5],[18,43,5],[19,43,5],[20,43,5],[21,43,5],[22,43,5],[23,43,5],[24,43,5],[25,43,5],[26,43,5],[27,43,5],[28,43,5],[29,43,5],[30,43,4],[31,43,4],[32,43,4],[33,43,4],[34,43,5],[35,43,5],[36,43,5],[37,43,5],[38,43,4],[39,43,4],[40,43,4],[41,43,5],[42,43,5],[43,43,5],[44,43,5],[45,43,5],[46,43,5],[47,43,5],[48,43,5],[49,43,5],[0,44,5],[1,44,5],[2,44,5],[3,44,5],[4,44,5],[5,44,5],[6,44,5],[7,44,5],[8,44,5],[9,44,5],[10,44,5],[11,44,5],[12,44,5],[13,44,2],[14,44,5],[15,44,5],[16,44,5],[17,44,5],[18,44,5],[19,44,5],[20,44,4],[21,44,5],[22,44,5],[23,44,5],[24,44,5],[25,44,5],[26,44,5],[27,44,5],[28,44,5],[29,44,5],[30,44,2],[31,44,4],[32,44,2],[33,44,2],[34,44,2],[35,44,4],[36,44,4],[37,44,5],[38,44,5],[39,44,4],[40,44,5],[41,44,4],[42,44,5],[43,44,5],[44,44,5],[45,44,5],[46,44,5],[47,44,5],[48,44,5],[49,44,5],[0,45,5],[1,45,5],[2,45,5],[3,45,5],[4,45,5],[5,45,5],[6,45,5],[7,45,5],[8,45,5],[9,45,5],[10,45,5],[11,45,5],[12,45,5],[13,45,5],[14,45,5],[15,45,5],[16,45,5],[17,45,5],[18,45,5],[19,45,4],[20,45,5],[21,45,5],[22,45,5],[23,45,5],[24,45,5],[25,45,5],[26,45,5],[27,45,5],[28,45,5],[29,45,5],[30,45,4],[31,45,2],[32,45,2],[33,45,2],[34,45,2],[35,45,4],[36,45,4],[37,45,4],[38,45,4],[39,45,4],[40,45,5],[41,45,4],[42,45,4],[43,45,5],[44,45,5],[45,45,5],[46,45,5],[47,45,5],[48,45,5],[49,45,5],[0,46,5],[1,46,5],[2,46,5],[3,46,5],[4,46,5],[5,46,5],[6,46,5],[7,46,5],[8,46,5],[9,46,5],[10,46,5],[11,46,5],[12,46,5],[13,46,5],[14,46,5],[15,46,5],[16,46,5],[17,46,5],[18,46,5],[19,46,5],[20,46,5],[21,46,5],[22,46,5],[23,46,5],[24,46,5],[25,46,5],[26,46,5],[27,46,5],[28,46,5],[29,46,4],[30,46,4],[31,46,4],[32,46,4],[33,46,2],[34,46,2],[35,46,4],[36,46,2],[37,46,4],[38,46,5],[39,46,4],[40,46,5],[41,46,5],[42,46,5],[43,46,5],[44,46,5],[45,46,5],[46,46,5],[47,46,5],[48,46,5],[49,46,5],[0,47,5],[1,47,5],[2,47,5],[3,47,5],[4,47,5],[5,47,5],[6,47,5],[7,47,5],[8,47,5],[9,47,5],[10,47,5],[11,47,5],[12,47,5],[13,47,5],[14,47,5],[15,47,5],[16,47,5],[17,47,5],[18,47,5],[19,47,5],[20,47,5],[21,47,5],[22,47,5],[23,47,5],[24,47,5],[25,47,5],[26,47,5],[27,47,5],[28,47,5],[29,47,5],[30,47,5],[31,47,5],[32,47,4],[33,47,5],[34,47,4],[35,47,5],[36,47,5],[37,47,5],[38,47,5],[39,47,5],[40,47,4],[41,47,4],[42,47,5],[43,47,5],[44,47,5],[45,47,5],[46,47,5],[47,47,5],[48,47,5],[49,47,5],[0,48,5],[1,48,5],[2,48,5],[3,48,5],[4,48,5],[5,48,5],[6,48,5],[7,48,5],[8,48,5],[9,48,5],[10,48,5],[11,48,5],[12,48,5],[13,48,4],[14,48,5],[15,48,4],[16,48,5],[17,48,5],[18,48,5],[19,48,5],[20,48,5],[21,48,5],[22,48,5],[23,48,5],[24,48,5],[25,48,5],[26,48,5],[27,48,5],[28,48,5],[29,48,5],[30,48,5],[31,48,5],[32,48,5],[33,48,5],[34,48,5],[35,48,5],[36,48,5],[37,48,5],[38,48,5],[39,48,5],[40,48,5],[41,48,4],[42,48,4],[43,48,5],[44,48,5],[45,48,5],[46,48,5],[47,48,5],[48,48,5],[49,48,5],[0,49,5],[1,49,5],[2,49,5],[3,49,5],[4,49,5],[5,49,5],[6,49,5],[7,49,5],[8,49,5],[9,49,5],[10,49,5],[11,49,5],[12,49,5],[13,49,5],[14,49,5],[15,49,5],[16,49,5],[17,49,5],[18,49,5],[19,49,5],[20,49,5],[21,49,5],[22,49,5],[23,49,5],[24,49,5],[25,49,5],[26,49,5],[27,49,5],[28,49,5],[29,49,5],[30,49,5],[31,49,5],[32,49,5],[33,49,5],[34,49,5],[35,49,5],[36,49,5],[37,49,5],[38,49,5],[39,49,5],[40,49,5],[41,49,4],[42,49,5],[43,49,5],[44,49,5],[45,49,5],[46,49,5],[47,49,5],[48,49,5],[49,49,5]];

                data.sort(function (a, b) {
                    var dist0 = (a[0] - 25) * (a[0] - 25) + (a[1] - 25) * (a[1] - 25);
                    var dist1 = (b[0] - 25) * (b[0] - 25) + (b[1] - 25) * (b[1] - 25);

                    return dist0 - dist1;
                });

                function renderItem(params, api) {
                    var context = params.context;
                    var lngIndex = api.value(0);
                    var latIndex = api.value(1);
                    var coordLeftTop = [
                        +(latExtent[0] + lngIndex * cellSizeCoord[0]).toFixed(6),
                        +(lngExtent[0] + latIndex * cellSizeCoord[1]).toFixed(6)
                    ];
                    var lngIndex = api.value(0);
                    var latIndex = api.value(1);
                    var pointLeftTop = getCoord(params, api, lngIndex, latIndex);
                    var pointRightBottom = getCoord(params, api, lngIndex + 1, latIndex + 1);

                    return {
                        type: 'rect',
                        shape: {
                            x: pointLeftTop[0],
                            y: pointLeftTop[1],
                            width: pointRightBottom[0] - pointLeftTop[0],
                            height: pointRightBottom[1] - pointLeftTop[1]
                        },
                        style: api.style({
                            stroke: 'rgba(0,0,0,0.1)'
                        }),
                        styleEmphasis: api.styleEmphasis()
                    };
                }

                function getCoord(params, api, lngIndex, latIndex) {
                    var coords = params.context.coords || (params.context.coords = []);
                    var key = lngIndex + '-' + latIndex;

                    // bmap returns point in integer, which makes cell width unstable.
                    // So we have to use right bottom point.
                    return coords[key] || (coords[key] = api.coord([
                        +(latExtent[0] + lngIndex * cellSizeCoord[0]).toFixed(6),
                        +(lngExtent[0] + latIndex * cellSizeCoord[1]).toFixed(6)
                    ]));
                }

                option = {
                    tooltip: {},
                    visualMap: {
                        type: 'piecewise',
                        inverse: true,
                        top: 10,
                        left: 10,
                        pieces: [{
                            value: 0, color: COLORS[0]
                        }, {
                            value: 1, color: COLORS[1]
                        }, {
                            value: 2, color: COLORS[2]
                        }, {
                            value: 3, color: COLORS[3]
                        }, {
                            value: 4, color: COLORS[4]
                        }, {
                            value: 5, color: COLORS[5]
                        }],
                        borderColor: '#aaa',
                        borderWidth: 2,
                        backgroundColor: '#eee',
                        dimension: 2,
                        inRange: {
                            // color: [
                            //     '#00b358', '#5dffa6', '#b8f4f4', '#f6d791',
                            //     '#f8d782', '#f8c600', '#f3b387', '#f78b3f'
                            // ],
                            color: COLORS,
                            opacity: 0.7
                        }
                    },
                    series: [
                        {
                            type: 'custom',
                            coordinateSystem: 'bmap',
                            renderItem: renderItem,
                            animation: false,
                            itemStyle: {
                                emphasis: {
                                    color: 'yellow'
                                }
                            },
                            encode: {
                                tooltip: 2
                            },
                            data: data,
                            progressiveThreshold: 1000
                        }
                    ],
                    bmap: {
                        center: [116.46, 39.92],
                        zoom: 11.8,
                        roam: true,
                        mapStyle: {
                        styleJson: [{
                            'featureType': 'water',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#d1d1d1'
                            }
                        }, {
                            'featureType': 'land',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#f3f3f3'
                            }
                        }, {
                            'featureType': 'railway',
                            'elementType': 'all',
                            'stylers': {
                                'visibility': 'off'
                            }
                        }, {
                            'featureType': 'highway',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#999999'
                            }
                        }, {
                            'featureType': 'highway',
                            'elementType': 'labels',
                            'stylers': {
                                'visibility': 'off'
                            }
                        }, {
                            'featureType': 'arterial',
                            'elementType': 'geometry',
                            'stylers': {
                                'color': '#fefefe'
                            }
                        }, {
                            'featureType': 'arterial',
                            'elementType': 'geometry.fill',
                            'stylers': {
                                'color': '#fefefe'
                            }
                        }, {
                            'featureType': 'poi',
                            'elementType': 'all',
                            'stylers': {
                                'visibility': 'off'
                            }
                        }, {
                            'featureType': 'green',
                            'elementType': 'all',
                            'stylers': {
                                'visibility': 'off'
                            }
                        }, {
                            'featureType': 'subway',
                            'elementType': 'all',
                            'stylers': {
                                'visibility': 'off'
                            }
                        }, {
                            'featureType': 'manmade',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#d1d1d1'
                            }
                        }, {
                            'featureType': 'local',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#d1d1d1'
                            }
                        }, {
                            'featureType': 'arterial',
                            'elementType': 'labels',
                            'stylers': {
                                'visibility': 'off'
                            }
                        }, {
                            'featureType': 'boundary',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#fefefe'
                            }
                        }, {
                            'featureType': 'building',
                            'elementType': 'all',
                            'stylers': {
                                'color': '#d1d1d1'
                            }
                        }, {
                            'featureType': 'label',
                            'elementType': 'labels.text.fill',
                            'stylers': {
                                'color': 'rgba(0,0,0,0)'
                            }
                        }]
                    }
                }
            };

            var chart = testHelper.createChart(echarts, 'grid', option);


            function generateData() {
                var data = [];
                for (var i = 0; i < cellCount[1]; i++) {
                    for (var j = 0; j < cellCount[0]; j++) {
                        data.push([j, i, COLORS.length - 1]);
                    }
                }
                return data;
            }

            function generateData3() {
                var data = [];
                var min = Infinity;
                var max = -Infinity;
                var center = [
                    Math.floor(cellCount[0] * 0.45),
                    Math.floor(cellCount[1] * 0.45)
                ];

                for (var i = 0; i < cellCount[1]; i++) {
                    for (var j = 0; j < cellCount[0]; j++) {
                        var x = (j - center[0]);
                        var y = (i - center[1]);
                        var value = Math.cos(
                            Math.pow(x / center[0] * Math.PI, 2)
                            + Math.pow(y / center[1] * Math.PI, 2)
                        );

                        min = Math.min(min, value);
                        max = Math.max(max, value);
                        data.push([j, i, value]);
                    }
                }

                return {
                    data: data,
                    min: min,
                    max: max
                }
            }


            initPens(echarts, chart, data);
        });

    </script>


    </body>
</html>