I finally ended as follow :
since this keyword can not be accessible to access component class methods
from the event handler, I had to keep a reference to it .
const reference = this;
xstart : number;
function dragstarted(d)
{
.. reference.xstart = d3.event.x;
}
....
d3... .on("start",dragstarted)
Le vendredi 1 février 2019 16:29:49 UTC+1, Stéphane Ancelot a écrit :
>
> Hi,
> I have got to implement drag and drop in a svg d3js component.
>
> the svg elements are created dynamically .
>
> I want to retrieve the transform attribute of the dragged element in the
> drag handler.
>
> This would mean, I would need ElementRef of these dynamically allocated
> element.
>
> I suppose , the solution needs ViewChildren , but I don't know how to
> implement it.
>
> The elements are created using the following code :
> this.g = this.svg.selectAll(".dimension")
> .data(dimensions)
> .enter().append("g")
> .attr("class", "dimension")
>
> .attr("transform", function(d) { return "translate(0," + _this.y(d
> .id) + ")"; })
>
> Regards
>
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