I'm trying to compile Nim source to JavaScript. I use a simple (partial) Nim
wrapper for Dygraphs library and I create some graphs from my Nim code. The
problem is that I don't understand ho to pass to Dygraphs an option with the
function reference. In Javascript it should be like this:
new Dygraph(
document.getElementById("div_g"),
data,
{
labels: ['X', 'Est.', 'Actual'],
animatedZooms: true,
underlayCallback: function(canvas, area, g) {
var bottom_left = g.toDomCoords(highlight_start, -20);
var top_right = g.toDomCoords(highlight_end, +20);
var left = bottom_left[0];
var right = top_right[0];
canvas.fillStyle = "rgba(255, 255, 102, 1.0)";
canvas.fillRect(left, area.y, right - left, area.h);
}
}
);
Run
How should I define underlayCallback in Nim and how should I declare this
option in wrapper?
My wrapper is here:
[https://raw.githubusercontent.com/Peter2121/noogest/master/dygraph.nim](https://raw.githubusercontent.com/Peter2121/noogest/master/dygraph.nim)
I create the graph from another module like this:
var opts = NimDygraphOpts()
...
tempGraphs[channel] = newDygraph(parent,cData,opts[])
Run
So, probably, I need to declare a new option in NimDygraphOpts object, set it
to some function pointer and then pass it to newDygraph. But I dont't
understand what type of object should I use for this option and how should I
assign it.
