JavaScript Custom Cursor Chart

This example serves as an example for creating a custom cursor for XY charts.

Custom cursors can be required for different purposes - like major structural changes or very application specific styling requirements.

If lesser changes to default cursors are required then please see read about different methods of configuring cursor behavior - Features > Cursor section in Developer documentation is a good reference.

All charts expose a simple method: setCustomCursor which can be conveniently used to firstly disable the built-in cursor and secondly trigger an automatic callback whenever the cursor should be displayed or hidden, with all information about the pointed data prepared beforehand.

Thanks to this, regardless how you want to display your custom cursor, it is extremely easy to plug it to LCJS.

ChartXY.setCustomCursor((chart, hit, hits) => {
    // hit : { x, y, series, axisX, axisY, ... }
    // hits contain information of all cursor hits in case of multi series cursors
})

In this example, the cursor is displayed using UI textboxes and a custom tick on the time axis.

More custom cursor examples can be found by looking for "cursor" tag in the Interactive Examples gallery - for example, using HTML & CSS for an animated result table or connecting to an UI framework.