I would like to focus on a node when it is searched for by name. I am trying to do this using a recenter method....
zoom = d3.behavior.zoom()
.scaleExtent([.05, 10])
.on("zoom", zoomed);
svg = d3.select("#graph")
.append("svg")
.attr("height", height)
.attr("width", width)
.call(zoom);
....
function zoomed(sel) {
zoomBase(d3.event.translate , d3.event.scale);
}
function zoomBase(translate, scale){
zoom.scale(scale);
zoom.translate(translate);
container.attr("transform", "translate(" + translate + ")scale(" + scale + ")");
}
function recenter(node){
var node = findNodeByName(node);
if(zoom.scale() < 0.5){
zoom.scale(0.5);
}
zoom.translate([node.x, node.y]); // Math seems to be wrong here
container.attr("transform", "translate(" + translate + ")scale(" + zoom.scale() + ")");
}
The problem is that when I am over the node in question and search for it my location shows up as [-2246.3690822841745, -846.6411913027562] but when I get the x and y off of the actual node I get [4346.868560310511, 1950.790521658118] considering I am over top of the node, is there some math or something I need here?
Lars was right this is the answer...
zoom.translate([width / 2 - zoom.scale() * node.x, height / 2 - zoom.scale() * node.y])
To break this down a bit
width / 2 (go to middle)
-
zoom.scale() * node.x (move middle to the scaled x)