Question

我正在使用dojo柱形图。我想添加一个在绘图上绘制的自定义线（某种阈值线）。所以，让我们说y轴的范围从0到5.我想要一条水平线，比如4.2，在整个地块上运行。这是一个柱形图。我希望找到一些绘图API，可以帮助我在绘图上自定义绘图，但我无法弄清楚如何。我知道图表使用gfx和surface，所以如果我可以得到图表/图表面的句柄，也许我可以绘制一个自定义行？还需要数据来呈现坐标映射以实现这一目标

我当前的图表使用的代码如下：

var mychart = new dojox.charting.Chart2D("columns").
        addAxis("x", {fixLower: "minor", fixUpper: "minor", natural: true,
                            font: "normal normal 10pt Arial", 
                             labels: [{value: 1, text: "Q2 FY11"},
                                      {value: 2, text: "Q3 FY11"},
                                    {value: 3, text: "Q4 FY11"},
                                    {value: 4, text: "Q1 FY12"}]
                            }).
        addAxis("y", {vertical: true, includeZero: false, fixLower: "major", fixUpper: "major", min: 0, max: 5, font: "normal normal 10pt Arial", majorTick: {color: "black", length: 6}, minorTicks: false}).
        addPlot("default", {type: "ClusteredColumns", tension: "S", shadows: {dx: 2, dy: 2}, gap: 5, minBarSize : 14, maxBarSize:24, animate:  { duration: 1000, easing: dojo.fx.easing.linear} }).
        addSeries("Series A", [{ y: 2.3, tooltip: "FFFF"}, { y: 3.5, tooltip: "GGGG"}]).
        addSeries("Series B", [1.2, 2.5]);

Answer 1

您可以使用其他图表渲染该线条。

new dojox.charting.Chart2D("columns").
    addAxis("x", {fixLower: "minor", fixUpper: "minor", natural: true,
                        font: "normal normal 10pt Arial", 
                         labels: [{value: 1, text: "Q2 FY11"},
                                  {value: 2, text: "Q3 FY11"},
                                {value: 3, text: "Q4 FY11"},
                                {value: 4, text: "Q1 FY12"}]
                        }).
    addAxis("y", {vertical: true, includeZero: false, fixLower: "major", fixUpper: "major", min: 0, max: 5, font: "normal normal 10pt Arial", majorTick: {color: "black", length: 6}, minorTicks: false}).
    addPlot("default", {type: "ClusteredColumns", tension: "S", shadows: {dx: 2, dy: 2}, gap: 5, minBarSize : 14, maxBarSize:24, animate:  { duration: 1000, easing: dojo.fx.easing.linear} }).
    addSeries("Series A", [{ y: 2.3, tooltip: "FFFF"}, { y: 3.5, tooltip: "GGGG"}]).
    addSeries("Series B", [1.2, 2.5]).
    addPlot("threshold", { type: "Lines" }).
    addSeries("threshold", [{x: 0, y: 4.2}, {x: 4, y: 4.2}], { plot: "threshold" }).
    render();

Answer 2

另一个简单示例将max_temperature表示为Lines，将Min_temperature表示为同一图表中的列：

var chart = new Chart("chartNode");

chart.addPlot("tempMaxPlot", {
    type: "Lines",
    markers: false
});

chart.addPlot("tempMinPlot", {
    type: "Columns",
    markers: true,
    gap: 5
});

chart.addAxis("x");
chart.addAxis("y", { min: -3, max: 13, vertical: true, fixLower: "minor", fixUpper: "major" });

var chartData_tmax = [11,13,12,11,10,9,9,10];
chart.addSeries("tmax",chartData_tmax, { plot: "tempMaxPlot" });

var chartData_tmin = [1,1,2,1,0,-1,-1,0];
chart.addSeries("tmin",chartData_tmin, { plot: "tempMinPlot" });

chart.render();

Answer 3

最后但并非最不重要的是，您可以通过gfx绘图功能手动绘制线条，如下所述：

Add a line (not a series) to a dojo chart

如何在dojo柱形图上叠加一条线

3 个答案: