Function findClosestEdge

src/traces/treemap/plot_one.js:69–91

(pt, ref, size)

    };

    var findClosestEdge = function(pt, ref, size) {
        var e = trace.tiling.pad;
        var isLeftOfRect = function(x) { return x - e <= ref.x0; };
        var isRightOfRect = function(x) { return x + e >= ref.x1; };
        var isBottomOfRect = function(y) { return y - e <= ref.y0; };
        var isTopOfRect = function(y) { return y + e >= ref.y1; };

        if(pt.x0 === ref.x0 && pt.x1 === ref.x1 && pt.y0 === ref.y0 && pt.y1 === ref.y1) {
            return {
                x0: pt.x0,
                x1: pt.x1,
                y0: pt.y0,
                y1: pt.y1
            };
        }

        return {
            x0: isLeftOfRect(pt.x0 - e) ? 0 : isRightOfRect(pt.x0 - e) ? size[0] : pt.x0,
            x1: isLeftOfRect(pt.x1 + e) ? 0 : isRightOfRect(pt.x1 + e) ? size[0] : pt.x1,
            y0: isBottomOfRect(pt.y0 - e) ? 0 : isTopOfRect(pt.y0 - e) ? size[1] : pt.y0,
            y1: isBottomOfRect(pt.y1 + e) ? 0 : isTopOfRect(pt.y1 + e) ? size[1] : pt.y1
        };
    };

    // stash of 'previous' position data used by tweening functions
    var prevEntry = null;