jsOMS/Chart/LineChart.js

(function (jsOMS)
{
    "use strict";

    jsOMS.Chart.LineChart = function (id)
    {
        this.chart = new jsOMS.Chart.ChartAbstract(id);

        // Setting default chart values
        this.chart.margin = {top: 5, right: 0, bottom: 0, left: 0};
        /** global: d3 */
        this.chart.color = d3.scale.category10();
        this.chart.axis  = {
            x: {
                visible: true,
                label: {
                    visible: true,
                    text: 'X-Axis',
                    position: "center",
                    anchor: 'middle'
                },
                tick: {
                    prefix: '',
                    orientation: 'bottom',
                    size: 7
                },
                min: 0,
                max: 0
            },
            y: {
                visible: true,
                label: {
                    visible: true,
                    text: 'Y-Axis',
                    position: 'center',
                    anchor: 'middle'
                },
                tick: {
                    prefix: '',
                    orientation: 'bottom',
                    size: 7
                },
                min: 0,
                max: 0
            },
            y0: {
                visible: false,
                min: 0,
                max: 0
            }
        };

        this.chart.grid = {
            x: {
                visible: true
            },
            y: {
                visible: true
            }
        };

        this.chart.subtype = 'line';
    };

    jsOMS.Chart.LineChart.prototype.getChart = function ()
    {
        return this.chart;
    };

    jsOMS.Chart.LineChart.prototype.setData = function (data)
    {
        this.chart.setData(data);
    };

    jsOMS.Chart.LineChart.prototype.draw = function ()
    {
        let line, svg, x, xAxis1, xAxis2, y, yAxis1, yAxis2, xGrid, yGrid, zoom, self = this;

        this.chart.calculateDimension();

        x      = this.chart.createXScale('linear');
        y      = this.chart.createYScale('linear');
        xAxis1 = this.chart.createXAxis(x);
        yAxis1 = this.chart.createYAxis(y);
        xGrid  = this.chart.createXGrid(x);
        yGrid  = this.chart.createYGrid(y);

        x.domain([this.chart.axis.x.min, this.chart.axis.x.max + 1]);
        y.domain([this.chart.axis.y.min - 1, this.chart.axis.y.max + 1]);

        if (this.chart.subtype === 'area') {
            line = d3.svg.area().interpolate(this.chart.dataSettings.interpolate).x(function (d)
            {
                return x(d.x);
            }).y0(this.chart.getDimension().height).y1(function (d)
            {
                return y(d.y);
            });
        } else if (this.chart.subtype === 'diffarea') {
            y.domain([this.chart.axis.y0.min - 1, this.chart.axis.y.max + 1]);

            line = d3.svg.area().interpolate(this.chart.dataSettings.interpolate).x(function (d)
            {
                return x(d.x);
            }).y0(function (d) {
                return y(d.y0);
            }).y1(function (d)
            {
                return y(d.y);
            });
        } else if (this.chart.subtype === 'stacked') {
            line = d3.svg.area().interpolate(this.chart.dataSettings.interpolate).x(function (d)
            {
                return x(d.x);
            }).y0(function (d)
            {
                return y(d.y0);
            }).y1(function (d)
            {
                return y(d.y + d.y0);
            });
        } else if (this.chart.subtype === 'line') {
            line = d3.svg.line().interpolate(this.chart.dataSettings.interpolate).x(function (d)
            {
                return x(d.x);
            }).y(function (d)
            {
                return y(d.y);
            });
        } else {
            return;
        }

        zoom = d3.behavior.zoom().x(x).scaleExtent([1, 2]).on('zoom', function ()
        {
            let tx, ty;
            tx = d3.event.translate[0];
            ty = d3.event.translate[1];
            tx = Math.min(1,
                Math.max(tx,
                    self.chart.dimension.width
                    - self.chart.margin.right
                    - self.chart.margin.left
                    - Math.round(x(self.chart.axis.y.max) - x(1)),
                    self.chart.dimension.width
                    - self.chart.margin.right
                    - self.chart.margin.left
                    - Math.round(x(self.chart.axis.y.max) - x(1)) * d3.event.scale));

            zoom.translate([tx, ty]);
            svg.select('.x.axis').call(xAxis1);
            svg.select('.x.grid').call(xGrid);
            svg.selectAll('.line').attr("d", function (d)
            {
                return line(d.points);
            }).style("stroke", function (d)
            {
                return self.chart.color(d.name);
            });

            if (self.chart.subtype === 'stacked') {
                return svg.selectAll('circle.dot').attr('cy', function (d)
                {
                    return y(d.y + d.y0);
                }).attr('cx', function (d)
                {
                    return x(d.x);
                }).attr('r', 4);
            } else {
                return svg.selectAll('circle.dot').attr('cy', function (d)
                {
                    return y(d.y);
                }).attr('cx', function (d)
                {
                    return x(d.x);
                }).attr('r', 4);
            }
        });

        svg = this.chart.chartSelect.append("svg")
            .attr("width", this.chart.dimension.width)
            .attr("height", this.chart.dimension.height)
            .append("g").attr("transform", "translate("
                + (this.chart.margin.left) + ","
                + (this.chart.margin.top) + ")");

        this.chart.drawGrid(svg, xGrid, yGrid);
        this.drawZoomPanel(svg, zoom);

        zoom.scaleExtent([1, Number.MAX_VALUE]);
        //svg.selectAll('.x.grid').transition().duration(500).call(xGrid);
        //svg.selectAll('.x.axis').transition().duration(500).call(xAxis1);
        //svg.selectAll('.y.axis').transition().duration(500).call(yAxis1);

        let dataPoint      = null,
            dataPointEnter = null,
            temp           = this.drawData(svg, line, dataPointEnter, dataPoint);

        dataPointEnter = temp[0];
        dataPoint      = temp[1];

        this.chart.drawMarker(svg, x, y, dataPointEnter, dataPoint);
        this.chart.drawLegend(svg, dataPointEnter, dataPoint);
        this.chart.drawText(svg);
        this.chart.drawAxis(svg, xAxis1, yAxis1);

        if (this.chart.shouldRedraw) {
            this.redraw();
        }

        return zoom.x(x);
    };

    jsOMS.Chart.LineChart.prototype.redraw = function ()
    {
        this.chart.shouldRedraw = false;
        this.chart.chartSelect.select("*").remove();
        this.draw();
    };

    jsOMS.Chart.LineChart.prototype.drawData = function (svg, line, dataPointEnter, dataPoint)
    {
        const self = this;
        dataPoint  = svg.selectAll(".dataPoint").data(this.chart.dataset, function (c)
        {
            return c.id;
        });

        dataPointEnter = dataPoint.enter().append("g").attr("class", "dataPoint");
        dataPointEnter.append("path").attr('clip-path', 'url(#clipper1)').attr("class", self.chart.subtype);
        dataPoint.select('path').style("stroke-width", this.chart.dataSettings.style.strokewidth).transition().duration(500).attr("d", function (d)
        {
            return line(d.points);
        }).style("stroke", function (d)
        {
            return self.chart.color(d.name);
        }).style("fill", function (d)
        {
            if (self.chart.subtype === 'area' || self.chart.subtype === 'stacked') {
                return self.chart.color(d.name);
            }
        });

        return [dataPointEnter, dataPoint];
    };

    jsOMS.Chart.LineChart.prototype.drawZoomPanel = function (svg, zoom)
    {
        this.chart.position.zoompanel.top = 10;

        svg.append("rect")
            .attr('class', 'zoom-panel')
            .attr('y', this.chart.position.zoompanel.top)
            .attr("width",
                this.chart.dimension.width
                - this.chart.margin.right
                - this.chart.margin.left
            )
            .attr("height",
                this.chart.dimension.height
                - this.chart.margin.top
                - this.chart.margin.bottom - this.chart.position.zoompanel.top
            ).call(zoom);
    };
}(window.jsOMS = window.jsOMS || {}));