【发布时间】：2015-08-21 12:20:47
【问题描述】：
默认情况下，Highcharts 中的鼠标悬停跟踪会跟踪到 x 轴上最近的点。这适用于其他类型的图表，但是，使用我的甘特图 [http://jsfiddle.net/2xkfm87e/11/]，这会给最终用户带来不直观的结果。在下面的示例图像中，请注意光标最靠近第 8 类段。但是，类别 4 段的点 1 是 x 轴上最近的点，这是渲染的工具提示。我需要将跟踪集中在 y 轴上，以便如果光标最接近 y 轴上的某个点，则会呈现该工具提示。
这可能吗？ 感谢您的帮助！
$(function () {
// Define tasks
var tasks = [{
name: 'Category 1',
intervals: []
}, {
name: 'Category 2',
intervals: [{ // From-To pairs
from: Date.UTC(2010,5, 21),
to: Date.UTC(2015, 5, 21),
label: 'Category 2',
tooltip_data: 'this data'
}]
}, {
name: 'Category 3',
intervals: [{ // From-To pairs
from: Date.UTC(2011,05,16),
to: Date.UTC(2012,03,21 ),
label: 'Category 3',
tooltip_data: 'this data'
}, {
from: Date.UTC(2013,07,09),
to: Date.UTC(2015,05,22),
label: 'Category 3',
tooltip_data: 'this data'
}]
}, {
name: 'Category 4',
intervals: [{ // From-To pairs
from: Date.UTC(2013,07,18 ),
to: Date.UTC(2015,05,22),
label: 'Category 4',
tooltip_data: 'this data'
}]
}, {
name: 'Category 5',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 5',
tooltip_data: 'this data'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 5',
tooltip_data: 'this data'
}]
}, {
name: 'Category 6',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 6',
tooltip_data: 'this data'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 6',
tooltip_data: 'this data'
}]
}, {
name: 'Category 7',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 7',
tooltip_data: 'this data'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 7',
tooltip_data: 'this data'
}]
}, {
name: 'Category 8',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 8',
tooltip_data: 'this data'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 8',
tooltip_data: 'this data'
}]
}, {
name: 'Category 9',
intervals: [{ // From-To pairs
from: Date.UTC(2013,06,17),
to: Date.UTC(2014,04,21),
label: 'Category 9',
tooltip_data: 'this data'
}, {
from: Date.UTC(2015,01,22),
to: Date.UTC(2015,05,22),
label: 'Category 9',
tooltip_data: 'this data'
}]
}];
// re-structure the tasks into line seriesvar series = [];
var series = [];
$.each(tasks.reverse(), function(i, task) {
var item = {
name: task.name,
data: []
};
$.each(task.intervals, function(j, interval) {
item.data.push({
x: interval.from,
y: i,
label: interval.label,
from: interval.from,
to: interval.to,
tooltip_data: interval.tooltip_data
}, {
x: interval.to,
y: i,
from: interval.from,
to: interval.to,
tooltip_data: interval.tooltip_data
});
// add a null value between intervals
if (task.intervals[j + 1]) {
item.data.push(
[(interval.to + task.intervals[j + 1].from) / 2, null]
);
}
});
series.push(item);
});
// restructure the milestones
/*$.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: {
min:0,
max:8,
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'
}
},
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/>'+this.point.options.tooltip_data +'<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
});
console.log(series);
});
【问题讨论】：
标签： javascript jquery charts highcharts