function to be called when clicked on the button
Optionaltag?: stringTag to be applied on the created text display (if present) returns {CCommentaire}
The text displayed by the button
Optionalx?: string | number | CValDynx coordinate of the top button zoom in svg coordinates or 10 if absent
Optionaly?: string | number | CValDyny coordinate of the top button zoom in svg coordinates or 50 if absent
adds a button on the figure launching function callBack when clicked on syntaxes
addActionButton(text, callBack),addActionButton(text, callBack, x, y)andaddActionButton(text, callBack, x, y, tag)are allowed too where callBack is the launched function when the button is clicked