[Feature] `data.onmove`-Callback

[michkami]

Is your feature request related to a problem? Please describe.
I'm using custom Tooltip component in my angular project and would like to replace the billboard tooltip with it.
I can show and hide it thanks to data.onover and data.onout but I am not able to update the position of the tooltip while moving the mouse around the chart.

Describe the solution you'd like
Add data.onmove-Callback which includes the current tooltip position. This way it would be possible to update custom tooltip components with the current position.

[netil]

Hi @michkami,
by using existing tooltip.position option can achieve your needs.

Update your custom tooltip component's position within tooltip.position callback with given pos object value.

bb.generate({
    data: {
    	columns: [
		["data1", 100, 200, 100, 400, 150, 250],
        ],
        type: "bar",
	onover: function() {
		// show the custom tooltip
	},
	onout: function() {
		// hide the custom tooltip
	},
  },  
  tooltip: {
	contents: () => "",  // this will take same effect to hide default tooltip
	position: function(data, width, height, element, pos) {
		// update the custom tooltip position
		// pos.x, pos.y
	}
  }
});