How to programmatically trigger a D3 drag event?

d3.js, javascript

Solution

Save the callback (the one you pass into the drag handler) in a variable and then call this variable in your other context.

var dragCallback = function(){
    console.log(d3.event.dx, d3.event.dy);
};
var dragBehavior = d3.behavior.drag()
    .on("drag", dragCallback);
myNodes.enter()
    .append("g")
    .call(dragBehavior);
    //Call drag method programmatically
dragCallback()

Problem

So i have some data binded with drag event listeners : ``` myNodes.enter() .append("svg:g") .call(d3.behavior.drag() .on("drag", function() { console.log(d3.event.dx, d3.event.dy); }) ); ``` Now I want to call this onDrag function on a certain node programmatically. I do know the same is possible with standard events by doing ``` aNode.on("click")() // works aNode.on("drag")() // doesn't work ``` Is there any way to do so ? Thanks.

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