javascript - Vis.js 不会使用 .fit() 放大到 1.0 以上

Question

我正在使用库 Vis.js 来显示网络。 对于我的应用程序，我需要全屏显示网络，节点几乎触及其容器的边界。

问题出在network.fit();它不会比比例“1.0”进一步放大

我写了一个 Fiddle 来展示这个问题: http://jsfiddle.net/v1467x1d/12/

var nodeSet = [
    {id:1,label:'big'},
    {id:2,label:'big too'} ];

var edgeSet = [ 
    {from:1, to:2} ];

var nodes = new vis.DataSet(nodeSet);
var edges = new vis.DataSet(edgeSet);

var container = document.getElementById('mynetwork');
var data = {
    nodes: nodes,
    edges: edges
};
var options = {};

var network = new vis.Network(container, data, options);
network.fit();
console.log( 'scale: '+ network.getScale() ); // Always 1

如何强制 Vis 缩放直到网络全屏显示？

Answer 1

正如 Richard 所说 - 现在，此方法无法按预期工作。您可以使用自定义方法，作为一个概念:

function bestFit() {

  network.moveTo({scale:1}); 
  network.stopSimulation();
   
  var bigBB = { top: Infinity, left: Infinity, right: -Infinity, bottom: -Infinity }
  nodes.getIds().forEach( function(i) {
    var bb = network.getBoundingBox(i);
    if (bb.top < bigBB.top) bigBB.top = bb.top;
    if (bb.left < bigBB.left) bigBB.left = bb.left;
    if (bb.right > bigBB.right) bigBB.right = bb.right;
    if (bb.bottom > bigBB.bottom) bigBB.bottom = bb.bottom;  
  })
  
  var canvasWidth = network.canvas.body.container.clientWidth;
  var canvasHeight = network.canvas.body.container.clientHeight; 

  var scaleX = canvasWidth/(bigBB.right - bigBB.left);
  var scaleY = canvasHeight/(bigBB.bottom - bigBB.top);
  var scale = scaleX;
  if (scale * (bigBB.bottom - bigBB.top) > canvasHeight ) scale = scaleY;

  if (scale>1) scale = 0.9*scale;
 
  network.moveTo({
    scale: scale,
    position: {
        x: (bigBB.right + bigBB.left)/2,
      y: (bigBB.bottom + bigBB.top)/2
    }
  })
  
}

[ http://jsfiddle.net/dv4qyeoL/]