我的网页上有一个 Highcharts ,它是折线图。它具有缩放功能,我使用 chart.events.selection
捕获缩放事件。一切正常。
但我想连续捕获选择事件(即基本上是单击和拖动事件)以在选择的开头和结尾显示工具提示,以显示用户选择的时间。在 Highcharts 文档中找不到。任何帮助,将不胜感激。
这是我当前捕获选择事件的代码:
$(obj.id).highcharts({
chart: {
type: 'areaspline',
backgroundColor:"rgba(0,0,0,0)",
zoomType:"x",
events: {
selection: function(event){
if(!event.xAxis)
return;
.....
最佳答案
更新:
更新示例,其中标签跟随选择标记:http://jsfiddle.net/pq0wn0xx/2/
我认为没有拖动事件(不适用于点),但您可以包装拖动指针的方法。
Highcharts.wrap(Highcharts.Pointer.prototype, 'drag', function (p, e) {
p.call(this, e);
var H = Highcharts,
chart = this.chart,
selectionMarker = this.selectionMarker,
bBox,
xAxis,
labelLeft,
labelRight,
labelY,
attr,
css,
timerLeft,
timerRight;
if (selectionMarker) {
if (!chart.customLabels) {
chart.customLabels = [];
}
bBox = selectionMarker.getBBox();
xAxis = chart.xAxis[0];
labelLeft = chart.customLabels[0];
labelRight = chart.customLabels[1];
labelY = chart.plotTop + 10;
if (!labelLeft || !labelRight) {
attr = {
fill: Highcharts.getOptions().colors[0],
padding: 10,
r: 5,
zIndex: 8
};
css = {
color: '#FFFFFF'
};
labelLeft = chart.renderer.label('', 0, 0).attr(attr).css(css).add();
labelRight = chart.renderer.label('', 0, 0).attr(attr).css(css).add();
chart.customLabels.push(labelLeft, labelRight);
}
clearTimeout(timerLeft);
clearTimeout(timerRight);
labelLeft.attr({
x: bBox.x - labelLeft.getBBox().width,
y: labelY,
text: 'min: ' + H.numberFormat(xAxis.toValue(bBox.x), 2),
opacity: 1
});
labelRight.attr({
x: bBox.x + bBox.width,
y: labelY,
text: 'max: ' + H.numberFormat(xAxis.toValue(bBox.x + bBox.width), 2),
opacity: 1
});
timerLeft = setTimeout(function () {
labelLeft.fadeOut();
}, 3000);
timerRight = setTimeout(function () {
labelRight.fadeOut();
}, 3000);
}
});
旧答案:
example来自官方API 可以扩展到你需要的。
jsfiddle上的代码和例子如下:
function positionLabels(e, chart) {
if (!chart.customLabels) {
chart.customLabels = [];
}
var labelLeft,
labelRight,
attr,
css,
xAxis,
xMin,
xMax,
yAxis,
yMin,
yMax,
yMiddle,
timerLeft,
timerRight;
if (!e.resetSelection) {
labelLeft = chart.customLabels[0];
labelRight = chart.customLabels[1];
if (!labelLeft || !labelRight) {
attr = {
fill: Highcharts.getOptions().colors[0],
padding: 10,
r: 5,
zIndex: 8
};
css = {
color: '#FFFFFF'
};
labelLeft = chart.renderer.label('', 0, 0).attr(attr).css(css).add();
labelRight = chart.renderer.label('', 0, 0).attr(attr).css(css).add();
chart.customLabels.push(labelLeft, labelRight);
}
clearTimeout(timerLeft);
clearTimeout(timerRight);
xAxis = e.xAxis[0].axis;
xMin = e.xAxis[0].min;
xMax = e.xAxis[0].max;
yAxis = chart.yAxis[0];
yMin = yAxis.min;
yMax = yAxis.max;
yMiddle = (yMax - yMin) * 0.95;
labelLeft.attr({
x: xAxis.toPixels(xMin) - labelLeft.getBBox().width,
y: yAxis.toPixels(yMiddle),
text: 'min: ' + Highcharts.numberFormat(xMin, 2),
opacity: 1
});
labelRight.attr({
x: xAxis.toPixels(xMax),
y: yAxis.toPixels(yMiddle),
text: 'max: ' + Highcharts.numberFormat(xMax, 2),
opacity: 1
});
timerLeft = setTimeout(function () {
labelLeft.fadeOut();
}, 2000);
timerRight = setTimeout(function () {
labelRight.fadeOut();
}, 2000);
}
}
关于javascript - Highcharts 捕获选择,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40289020/