Add support for clickable hover text or a per pt onclick attribute

Users can put links inside hover labels, but when user try to click the link, the hover label obviously disappears. So perhaps we could add optional “sticky” hover labels, where you click and the hover label is persistent until you click again?

Defining what sticky means will be tricky. It probably doesn't apply to every situation. Maybe we could add it as a new layout.hovermode e.g. 'hovermode: 'sticky'.

So, maybe instead we could define a linkonclick attribute e.g. linkonclick: ['https://plot.ly/~empet/101', 'https://plot.ly', /* ... one link per data pt */] that way clicking on a data pt would open the link instead of hovering on the data pt -> move mouse over link in hover label -> click on it.

cc @jackparmer

Aucun fichier, test ou point d’entrée n’est identifié. Il faut d’abord clarifier si le comportement attendu correspond à des libellés de survol persistants ou à des liens par point au clic ; le travail est terminé lorsque l’interaction est clairement définie et qu’une implémentation correspondante est fournie.