On this official Highcharts demo https://www.highcharts.com/demo/gantt/with-navigation
the display starts at the end
What do I need to change, so the navigation range starts at the beginning like so?
You can use setExtremes method in load event:
chart: {
events: {
load: function() {
const xAxis = this.xAxis[0];
xAxis.setExtremes(xAxis.dataMin, xAxis.dataMin + xAxis.max - xAxis.min);
}
}
}
Live demo: https://jsfiddle.net/BlackLabel/8tk52zdw/
API Reference: https://api.highcharts.com/class-reference/Highcharts.Axis#setExtremes
Related
In this Highcharts column chart the user can drill down by clicking on the column.
This works fine, however all the data, including the data of the drilled column, needs to be available when the chart is firstly created.
What I need is to capture the drilldown event click and populate the chart with that information, sending the data only when the user clicked on a specific column. Is this possible?
Yes, it is possible and simple. You need to use drilldown event callback function, call API request in it and use addSeriesAsDrilldown method - as in the example below:
chart: {
type: 'column',
events: {
drilldown: function(e) {
if (!e.seriesOptions) {
var chart = this,
drilldowns = {
...
},
series = drilldowns[e.point.name];
// Show the loading label
chart.showLoading('Simulating Ajax ...');
setTimeout(function() {
chart.hideLoading();
chart.addSeriesAsDrilldown(e.point, series);
}, 1000);
}
}
}
}
Live demo: https://jsfiddle.net/BlackLabel/e9m74kgp/
API Reference:
https://api.highcharts.com/highcharts/chart.events.drilldown
https://api.highcharts.com/class-reference/Highcharts.Chart#addSeriesAsDrilldown
I have more than one chart in one page, all of them uses same data but in different chart types.
I would like to change all of their time with only one navigator on the top. like using it as a datepicker input, how can i achieve that?
Use afterSetExtremes event callback function and apply the same extremes on the rest charts:
xAxis: {
events: {
afterSetExtremes: function(e) {
var min = e.userMin,
max = e.userMax;
chart1.xAxis[0].setExtremes(min, max, true, false);
chart2.xAxis[0].setExtremes(min, max, true, false);
}
}
}
Live demo: http://jsfiddle.net/BlackLabel/8gc9qwsp/
API Reference:
https://api.highcharts.com/class-reference/Highcharts.Axis#setExtremes
https://api.highcharts.com/highstock/xAxis.events.afterSetExtremes
I want to show some bars' tooltip as default (not all of them) without hovering on them. is there any way to do this?
After chart is loaded, you can use onMouseOver point's method to display a tooltip.
chart: {
events: {
load: function() {
this.series[0].points[3].onMouseOver();
}
}
}
Live demo: https://jsfiddle.net/BlackLabel/dnao0rv6/
API Reference: https://api.highcharts.com/class-reference/Highcharts.Point#onMouseOver
I have created my own master-detail chart following the Highcharts docs and this example: https://www.highcharts.com/demo/dynamic-master-detail
Eveything works fine but I would like to add a feature: When the chart is loaded the last 50 data points should automatically be selected in the master chart and thus shown in the detail chart.
I tried to manually trigger the selection event but it did not work out. Any idea how to solve this?
You can fire selection event in chart load event and set correct extremes:
chart: {
...
events: {
load: function() {
var points = this.series[0].points,
xAxis = this.xAxis[0];
Highcharts.fireEvent(this, 'selection', {
xAxis: [{
min: points[points.length - 51].x,
max: points[points.length - 1].x
}],
});
},
selection: function(event) {
...
}
}
}
Live demo: https://jsfiddle.net/BlackLabel/xy8qug9h/
API: https://api.highcharts.com/highcharts/chart.events.load
In Highcharts time series currently we are able to zoom in data and we can reset zoom through button but i want something that can zoom out in steps in same manner like how we zoom in. Is there any way? Any help would be great.Thanks in advance
The idea is to find, after zooming selection, new xAxis extremes, and keep them in extremesXmin and extremesXmax arrays, then set these previous extremes after clicked resetZoomButton:
chart: {
zoomType: 'x',
events: {
selection: function(e) {
if (e.xAxis) {
extremesXmin.push(e.xAxis[0].min)
extremesXmax.push(e.xAxis[0].max)
}
zoomLevel++;
}
}
},
To control the button and set new extremes, you need to overwrite zoomOut() function inside showResetZoom() function inside Highcharts prototype:
function zoomOut() {
if (zoomLevel > 1) {
chart.xAxis[0].setExtremes(extremesXmin[extremesXmin.length - 2], extremesXmax[extremesXmax.length - 2])
extremesXmin.pop()
extremesXmax.pop()
zoomLevel--;
} else {
chart.zoomOut();
}
}
Working demo: https://jsfiddle.net/BlackLabel/h8af7L9g/