我正在尝试构建一个GANTT图表，就像在这个JSFiddle示例中一样 [http://jsfiddle.net/2xkfm87e/11/]（我现在已经使用jlbriggs＆＃39;输入下面的工作版本更新了这个小提琴。它还包括我需要的其他一些选项 - 即每个时间间隔的工具提示。）
但是，即使一个或多个类别没有任何相关数据，我也需要显示所有类别。最终用户需要知道没有与该类别相关的数据。在我的JSFiddle示例中，我能想到的最好的就是使用初始日期并创建一个点，通知用户该类别没有数据。我宁愿它是空的。
对此有任何帮助将不胜感激！
$(function () {
// Define tasks
var tasks = [{
name: 'Category 1',
intervals: [{ // From-To pairs
from: Date.UTC(2010,5, 21),
to: Date.UTC(2015, 5, 21),
label: 'Category 1'
}]
}, {
name: 'Category 2- Should be null',
intervals: [{ // From-To pairs
from: Date.UTC(2010,5, 21),
to: Date.UTC(2010, 5, 21),
label: 'Category 2- Should be null'
}]
}, {
name: 'Category 3',
intervals: [{ // From-To pairs
from: Date.UTC(2011,05,16),
to: Date.UTC(2012,03,21 ),
label: 'Category 3'
}, {
from: Date.UTC(2013,07,09),
to: Date.UTC(2015,05,22),
label: 'Category 3'
}]
}, {
name: 'Category 4',
intervals: [{ // From-To pairs
from: Date.UTC(2013,07,18 ),
to: Date.UTC(2015,05,22),
label: 'Category 4'
}]
}, {
name: 'Category 5',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 5'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 5'
}]
}, {
name: 'Category 6',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 6'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 6'
}]
}, {
name: 'Category 7',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 7'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 7'
}]
}, {
name: 'Category 8',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 8'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 8'
}]
}, {
name: 'Category 9',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 9'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 9'
}]
}];
// Define milestones
/*var milestones = [{
name: 'Get to bed',
time: Date.UTC(0, 0, 0, 22),
task: 1,
marker: {
symbol: 'triangle',
lineWidth: 1,
lineColor: 'black',
radius: 8
}
}];
*/
// re-structure the tasks into line seriesvar series = [];
var series = [];
$.each(tasks.reverse(), function(i, task) {
var item = {
name: task.name,
data: []
};
$.each(task.intervals, function(j, interval) {
item.data.push({
x: interval.from,
y: i,
label: interval.label,
from: interval.from,
to: interval.to
}, {
x: interval.to,
y: i,
from: interval.from,
to: interval.to
});
// add a null value between intervals
if (task.intervals[j + 1]) {
item.data.push(
[(interval.to + task.intervals[j + 1].from) / 2, null]
);
}
});
series.push(item);
});
// restructure the milestones
/*$.each(milestones, function(i, milestone) {
var item = Highcharts.extend(milestone, {
data: [[
milestone.time,
milestone.task
]],
type: 'scatter'
});
series.push(item);
});
*/
// create the chart
var chart = new Highcharts.Chart({
chart: {
renderTo: 'container'
},
title: {
text: 'Category History'
},
xAxis: {
type: 'datetime'
},
yAxis: {
categories: ['Category 9',
'Category 8',
'Category 7',
'Category 6',
'Category 5',
'Category 4',
'Category 3',
'Category 2',
'Category 1'],
tickInterval: 1,
tickPixelInterval: 200,
labels: {
style: {
color: '#525151',
font: '12px Helvetica',
fontWeight: 'bold'
},
/* formatter: function() {
if (tasks[this.value]) {
return tasks[this.value].name;
}
}*/
},
startOnTick: false,
endOnTick: false,
title: {
text: 'Criteria'
},
minPadding: 0.2,
maxPadding: 0.2,
fontSize:'15px'
},
legend: {
enabled: false
},
tooltip: {
formatter: function() {
return '<b>'+ tasks[this.y].name + '</b><br/>' +
Highcharts.dateFormat('%m-%d-%Y', this.point.options.from) +
' - ' + Highcharts.dateFormat('%m-%d-%Y', this.point.options.to);
}
},
plotOptions: {
line: {
lineWidth: 10,
marker: {
enabled: false
},
dataLabels: {
enabled: true,
align: 'left',
formatter: function() {
return this.point.options && this.point.options.label;
}
}
}
},
series: series
});
});
答案 0 :(得分：3)
即使没有数据，Highcharts默认行为也会显示该类别，除非它是第一个或最后一个类别。
您可以将输入数组更改为在您的情况下具有空intervals数组：
如果您需要第一个或最后一个类别为空，则需要在Y轴上设置最小值和最大值：